1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ssl/d1_pkt.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * DTLS implementation written by Nagendra Modadugu 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ==================================================================== 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the above copyright 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the documentation and/or other materials provided with the 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * distribution. 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * software must display the following acknowledgment: 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * endorse or promote products derived from this software without 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * prior written permission. For written permission, please contact 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * openssl-core@openssl.org. 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5. Products derived from this software may not be called "OpenSSL" 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * nor may "OpenSSL" appear in their names without prior written 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * permission of the OpenSSL Project. 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 6. Redistributions of any form whatsoever must retain the following 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * acknowledgment: 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OF THE POSSIBILITY OF SUCH DAMAGE. 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ==================================================================== 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This product includes cryptographic software written by Eric Young 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (eay@cryptsoft.com). This product includes software written by Tim 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Hudson (tjh@cryptsoft.com). 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * All rights reserved. 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This package is an SSL implementation written 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * by Eric Young (eay@cryptsoft.com). 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The implementation was written so as to conform with Netscapes SSL. 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This library is free for commercial and non-commercial use as long as 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the following conditions are aheared to. The following conditions 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * apply to all code found in this distribution, be it the RC4, RSA, 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * lhash, DES, etc., code; not just the SSL code. The SSL documentation 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * included with this distribution is covered by the same copyright terms 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * except that the holder is Tim Hudson (tjh@cryptsoft.com). 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright remains Eric Young's, and as such any Copyright notices in 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the code are not to be removed. 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If this package is used in a product, Eric Young should be given attribution 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * as the author of the parts of the library used. 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This can be in the form of a textual message at program startup or 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * in documentation (online or textual) provided with the package. 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the copyright 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in the 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * documentation and/or other materials provided with the distribution. 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this software 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * must display the following acknowledgement: 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes cryptographic software written by 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Eric Young (eay@cryptsoft.com)" 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The word 'cryptographic' can be left out if the rouines from the library 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * being used are not cryptographic related :-). 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. If you include any Windows specific code (or a derivative thereof) from 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the apps directory (application code) you must include an acknowledgement: 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SUCH DAMAGE. 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The licence and distribution terms for any publically available version or 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * derivative of this code cannot be changed. i.e. this code cannot simply be 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * copied and put under another distribution licence 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * [including the GNU Public Licence.] 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdio.h> 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <errno.h> 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define USE_SOCKETS 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "ssl_locl.h" 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/evp.h> 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/buffer.h> 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/pqueue.h> 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/rand.h> 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 125221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom/* mod 128 saturating subtract of two 64-bit values in big-endian order */ 126221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromstatic int satsub64be(const unsigned char *v1,const unsigned char *v2) 127221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom{ int ret,sat,brw,i; 128221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 129221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (sizeof(long) == 8) do 130221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { const union { long one; char little; } is_endian = {1}; 131221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom long l; 132221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 133221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (is_endian.little) break; 134221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* not reached on little-endians */ 135221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* following test is redundant, because input is 136221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom * always aligned, but I take no chances... */ 137221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (((size_t)v1|(size_t)v2)&0x7) break; 138221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 139221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom l = *((long *)v1); 140221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom l -= *((long *)v2); 141221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (l>128) return 128; 142221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else if (l<-128) return -128; 143221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else return (int)l; 144221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } while (0); 145221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 146221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom ret = (int)v1[7]-(int)v2[7]; 147221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom sat = 0; 148221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom brw = ret>>8; /* brw is either 0 or -1 */ 149221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (ret & 0x80) 150221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { for (i=6;i>=0;i--) 151221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { brw += (int)v1[i]-(int)v2[i]; 152221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom sat |= ~brw; 153221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom brw >>= 8; 154221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 155221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 156221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else 157221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { for (i=6;i>=0;i--) 158221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { brw += (int)v1[i]-(int)v2[i]; 159221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom sat |= brw; 160221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom brw >>= 8; 161221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 162221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 163221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom brw <<= 8; /* brw is either 0 or -256 */ 164221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 165221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (sat&0xff) return brw | 0x80; 166221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else return brw + (ret&0xFF); 167221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom} 168221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int have_handshake_fragment(SSL *s, int type, unsigned char *buf, 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int len, int peek); 171221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromstatic int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap); 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap); 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, 174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int *is_next_epoch); 175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int dtls1_record_needs_buffering(SSL *s, SSL3_RECORD *rr, 177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short *priority, unsigned long *offset); 178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int dtls1_buffer_record(SSL *s, record_pqueue *q, 180221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom unsigned char *priority); 181656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int dtls1_process_record(SSL *s); 182e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langleystatic int do_dtls1_write(SSL *s, int type, const unsigned char *buf, 183e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langley unsigned int len); 184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* copy buffered record into SSL structure */ 186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_copy_record(SSL *s, pitem *item) 188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_RECORD_DATA *rdata; 190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = (DTLS1_RECORD_DATA *)item->data; 192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.buf != NULL) 194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(s->s3->rbuf.buf); 195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet = rdata->packet; 197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = rdata->packet_length; 198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rbuf), &(rdata->rbuf), sizeof(SSL3_BUFFER)); 199656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rrec), &(rdata->rrec), sizeof(SSL3_RECORD)); 2003d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom 2013d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom /* Set proper sequence number for mac calculation */ 2023d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom memcpy(&(s->s3->read_sequence[2]), &(rdata->packet[5]), 6); 203656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 205656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 207656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 208656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 209221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromdtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority) 210221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 211221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom DTLS1_RECORD_DATA *rdata; 212656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 213656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 21498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Limit the size of the queue to prevent DOS attacks */ 21598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (pqueue_size(queue->q) >= 100) 21698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return 0; 21798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 218656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = OPENSSL_malloc(sizeof(DTLS1_RECORD_DATA)); 219221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom item = pitem_new(priority, rdata); 220656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rdata == NULL || item == NULL) 221656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 222656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rdata != NULL) OPENSSL_free(rdata); 223656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item != NULL) pitem_free(item); 224656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 225656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); 226656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 227656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 228656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 229656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata->packet = s->packet; 230656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata->packet_length = s->packet_length; 231656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(rdata->rbuf), &(s->s3->rbuf), sizeof(SSL3_BUFFER)); 232656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(rdata->rrec), &(s->s3->rrec), sizeof(SSL3_RECORD)); 233656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 234656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item->data = rdata; 235656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 236392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 237392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Store bio_dgram_sctp_rcvinfo struct */ 238392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && 239392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom (s->state == SSL3_ST_SR_FINISHED_A || s->state == SSL3_ST_CR_FINISHED_A)) { 240392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_GET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo); 241392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 242392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 243392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 244656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet = NULL; 245656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = 0; 246656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->s3->rbuf), 0, sizeof(SSL3_BUFFER)); 247656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->s3->rrec), 0, sizeof(SSL3_RECORD)); 248656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 249656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_setup_buffers(s)) 250656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 251656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); 252656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(rdata); 253656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 254656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 255656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 25677c6be7176c48d2ce4d5979a84876d34204eedafKenny Root 25777c6be7176c48d2ce4d5979a84876d34204eedafKenny Root /* insert should not fail, since duplicates are dropped */ 25877c6be7176c48d2ce4d5979a84876d34204eedafKenny Root if (pqueue_insert(queue->q, item) == NULL) 25977c6be7176c48d2ce4d5979a84876d34204eedafKenny Root { 26077c6be7176c48d2ce4d5979a84876d34204eedafKenny Root SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); 26177c6be7176c48d2ce4d5979a84876d34204eedafKenny Root OPENSSL_free(rdata); 26277c6be7176c48d2ce4d5979a84876d34204eedafKenny Root pitem_free(item); 26377c6be7176c48d2ce4d5979a84876d34204eedafKenny Root return(0); 26477c6be7176c48d2ce4d5979a84876d34204eedafKenny Root } 26577c6be7176c48d2ce4d5979a84876d34204eedafKenny Root 266656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 267221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 268656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 269656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 270656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 271656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue) 272656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 273656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 274656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 275656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_pop(queue->q); 276656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item) 277656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 278656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_copy_record(s, item); 279656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 280656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(item->data); 281656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 282656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 283656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 284656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 285656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 286656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 287656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 288656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 289656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 290656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* retrieve a buffered record that belongs to the new epoch, i.e., not processed 291656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * yet */ 292656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define dtls1_get_unprocessed_record(s) \ 293656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_retrieve_buffered_record((s), \ 294656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project &((s)->d1->unprocessed_rcds)) 295656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 296656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* retrieve a buffered record that belongs to the current epoch, ie, processed */ 297656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define dtls1_get_processed_record(s) \ 298656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_retrieve_buffered_record((s), \ 299656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project &((s)->d1->processed_rcds)) 300656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 301656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 302656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_process_buffered_records(SSL *s) 303656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 304656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 305656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 306656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_peek(s->d1->unprocessed_rcds.q); 307656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item) 308656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 309656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Check if epoch is current. */ 310656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->d1->unprocessed_rcds.epoch != s->d1->r_epoch) 311656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); /* Nothing to do. */ 312656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 313656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Process all the records. */ 314656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while (pqueue_peek(s->d1->unprocessed_rcds.q)) 315656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 316656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_unprocessed_record(s); 317656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( ! dtls1_process_record(s)) 318656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 319656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_buffer_record(s, &(s->d1->processed_rcds), 320221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom s->s3->rrec.seq_num); 321656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 322656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 323656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 324656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* sync epoch numbers once all the unprocessed records 325656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * have been processed */ 326656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->processed_rcds.epoch = s->d1->r_epoch; 327656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->unprocessed_rcds.epoch = s->d1->r_epoch + 1; 328656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 329656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 330656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 331656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 332656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 333656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 334656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 335656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 336656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_get_buffered_record(SSL *s) 337656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 338656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 339656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project PQ_64BIT priority = 340656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (((PQ_64BIT)s->d1->handshake_read_seq) << 32) | 341656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ((PQ_64BIT)s->d1->r_msg_hdr.frag_off); 342656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 343656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( ! SSL_in_init(s)) /* if we're not (re)negotiating, 344656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project nothing buffered */ 345656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 346656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 347656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 348656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_peek(s->d1->rcvd_records); 349656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item && item->priority == priority) 350656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 351656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Check if we've received the record of interest. It must be 352656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * a handshake record, since data records as passed up without 353656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * buffering */ 354656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_RECORD_DATA *rdata; 355656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_pop(s->d1->rcvd_records); 356656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = (DTLS1_RECORD_DATA *)item->data; 357656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 358656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.buf != NULL) 359656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(s->s3->rbuf.buf); 360656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 361656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet = rdata->packet; 362656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = rdata->packet_length; 363656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rbuf), &(rdata->rbuf), sizeof(SSL3_BUFFER)); 364656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rrec), &(rdata->rrec), sizeof(SSL3_RECORD)); 365656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 366656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(item->data); 367656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 368656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 369656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->d1->next_expected_seq_num++; */ 370656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 371656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 372656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 373656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 374656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 375656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 376656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 377656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 378656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 379656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_process_record(SSL *s) 380656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ 381221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int i,al; 382221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int enc_err; 383656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_SESSION *sess; 384221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom SSL3_RECORD *rr; 38504ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom unsigned int mac_size, orig_len; 386656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char md[EVP_MAX_MD_SIZE]; 387656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 388656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr= &(s->s3->rrec); 389221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom sess = s->session; 390656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 391656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* At this point, s->packet_length == SSL3_RT_HEADER_LNGTH + rr->length, 392656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and we have that many bytes in s->packet 393656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 394656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->input= &(s->packet[DTLS1_RT_HEADER_LENGTH]); 395656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 396656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* ok, we can now read from 's->packet' data into 'rr' 397656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * rr->input points at rr->length bytes, which 398656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * need to be copied into rr->data by either 399656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the decryption or by the decompression 400656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * When the data is 'copied' into the rr->data buffer, 401656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * rr->input will be pointed at the new buffer */ 402656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 403656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* We now have - encrypted [ MAC [ compressed [ plain ] ] ] 404656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * rr->length bytes of encrypted compressed stuff. */ 405656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 406656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check is not needed I believe */ 407656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH) 408656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 409656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 410656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG); 411656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 412656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 413656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 414656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* decrypt in place in 'rr->input' */ 415656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->data=rr->input; 416656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 417656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project enc_err = s->method->ssl3_enc->enc(s,0); 418fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom /* enc_err is: 419fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * 0: (in non-constant time) if the record is publically invalid. 420fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * 1: if the padding is valid 421fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * -1: if the padding is invalid */ 422fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom if (enc_err == 0) 423656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 424fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom /* For DTLS we simply ignore bad packets. */ 425fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom rr->length = 0; 426fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom s->packet_length = 0; 427fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom goto err; 428656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 429656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 430656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef TLS_DEBUG 431656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectprintf("dec %d\n",rr->length); 432656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); } 433656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectprintf("\n"); 434656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 435656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 436656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* r->length is now the compressed data plus mac */ 437fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom if ((sess != NULL) && 438fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom (s->enc_read_ctx != NULL) && 439fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom (EVP_MD_CTX_md(s->read_hash) != NULL)) 440656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 441fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom /* s->read_hash != NULL => mac_size != -1 */ 442fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom unsigned char *mac = NULL; 443fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom unsigned char mac_tmp[EVP_MAX_MD_SIZE]; 444fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom mac_size=EVP_MD_CTX_size(s->read_hash); 445fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE); 446fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom 447eeffacea337ec6a275e4c496acd12ca67a244533Brian Carlstrom /* kludge: *_cbc_remove_padding passes padding length in rr->type */ 448eeffacea337ec6a275e4c496acd12ca67a244533Brian Carlstrom orig_len = rr->length+((unsigned int)rr->type>>8); 449eeffacea337ec6a275e4c496acd12ca67a244533Brian Carlstrom 450fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom /* orig_len is the length of the record before any padding was 451fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * removed. This is public information, as is the MAC in use, 452fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * therefore we can safely process the record in a different 453fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * amount of time if it's too short to possibly contain a MAC. 454fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom */ 45504ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom if (orig_len < mac_size || 456fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom /* CBC records must have a padding length byte too. */ 457fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE && 45804ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom orig_len < mac_size+1)) 459656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 460fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom al=SSL_AD_DECODE_ERROR; 46104ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_LENGTH_TOO_SHORT); 462656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 463656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 464fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom 465fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE) 466656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 467fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom /* We update the length so that the TLS header bytes 468fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * can be constructed correctly but we need to extract 469fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * the MAC in constant time from within the record, 470fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * without leaking the contents of the padding bytes. 471fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * */ 472fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom mac = mac_tmp; 47304ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom ssl3_cbc_copy_mac(mac_tmp, rr, mac_size, orig_len); 4747d3d122363e2a85d516db314892f3d6112cb1377Brian Carlstrom rr->length -= mac_size; 475656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 4767d3d122363e2a85d516db314892f3d6112cb1377Brian Carlstrom else 477656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 47804ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom /* In this case there's no padding, so |orig_len| 479fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * equals |rec->length| and we checked that there's 480fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom * enough bytes for |mac_size| above. */ 481fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom rr->length -= mac_size; 482fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom mac = &rr->data[rr->length]; 483656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 484fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom 485fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom i=s->method->ssl3_enc->mac(s,md,0 /* not send */); 486fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom if (i < 0 || mac == NULL || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0) 487fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom enc_err = -1; 488fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+mac_size) 489fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom enc_err = -1; 490656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 491656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 492fa75fdba32eae335f286afb1dc93ef1b5ec72615Brian Carlstrom if (enc_err < 0) 4937b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom { 4947b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom /* decryption failed, silently discard message */ 4957b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom rr->length = 0; 4967b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom s->packet_length = 0; 4977b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom goto err; 4987b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom } 4997b476c43f6a45574eb34697244b592e7b09f05a3Brian Carlstrom 500656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* r->length is now just compressed */ 501656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->expand != NULL) 502656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 503656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH) 504656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 505656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 506656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG); 507656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 508656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 509656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_do_uncompress(s)) 510656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 511656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_DECOMPRESSION_FAILURE; 512656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_BAD_DECOMPRESSION); 513656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 514656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 515656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 516656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 517656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH) 518656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 519656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 520656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_DATA_LENGTH_TOO_LONG); 521656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 522656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 523656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 524656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->off=0; 525656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* So at this point the following is true 526656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.type is the type of record 527656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.length == number of bytes in record 528656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.off == offset to first valid byte 529656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.data == where to take bytes from, increment 530656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * after use :-). 531656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 532656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 533656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we have pulled in a full packet so zero things */ 534656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length=0; 535221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom dtls1_record_bitmap_update(s, &(s->d1->bitmap));/* Mark receipt of record. */ 536221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return(1); 537656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 538656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectf_err: 539656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_send_alert(s,SSL3_AL_FATAL,al); 540656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 541656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 542656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 543656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 544656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 545656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Call this to get a new input record. 546656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * It will return <= 0 if more data is needed, normally due to an error 547656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * or non-blocking IO. 548656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * When it finishes, one packet has been decoded and can be found in 549656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.type - is the type of record 550656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.data, - data 551656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.length, - number of bytes 552656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 553656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* used only by dtls1_read_bytes */ 554656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint dtls1_get_record(SSL *s) 555656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 55698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom int ssl_major,ssl_minor; 557656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,n; 558656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_RECORD *rr; 55998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom unsigned char *p = NULL; 560656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short version; 561656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_BITMAP *bitmap; 562656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int is_next_epoch; 563656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 564656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr= &(s->s3->rrec); 565656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 566221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* The epoch may have changed. If so, process all the 567221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom * pending records. This is a non-blocking operation. */ 5683d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom dtls1_process_buffered_records(s); 569656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 570656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* if we're renegotiating, then there may be buffered records */ 571656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dtls1_get_processed_record(s)) 572656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 573656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 574656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* get something from the wire */ 575656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectagain: 576656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check if we have the header */ 577656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( (s->rstate != SSL_ST_READ_BODY) || 578656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->packet_length < DTLS1_RT_HEADER_LENGTH)) 579656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 580656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n=ssl3_read_n(s, DTLS1_RT_HEADER_LENGTH, s->s3->rbuf.len, 0); 581656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* read timeout is handled by dtls1_read_bytes */ 582656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (n <= 0) return(n); /* error or non-blocking */ 583656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 58498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* this packet contained a partial record, dump it */ 58598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (s->packet_length != DTLS1_RT_HEADER_LENGTH) 58698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 58798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 58898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 58998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 590656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 591656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_BODY; 592656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 593656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p=s->packet; 594656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 595656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Pull apart the header into the DTLS1_RECORD */ 596656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type= *(p++); 597656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl_major= *(p++); 598656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl_minor= *(p++); 599656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project version=(ssl_major<<8)|ssl_minor; 600656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 601656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* sequence number is 64 bits, with top 2 bytes = epoch */ 602656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2s(p,rr->epoch); 603656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 604656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->read_sequence[2]), p, 6); 605656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p+=6; 606656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 607656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2s(p,rr->length); 608656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 609656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Lets check version */ 610656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!s->first_packet) 611656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 612221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (version != s->version) 613656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 61498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* unexpected version, silently discard */ 61598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 61698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 61798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 618656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 619656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 620656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 621221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if ((version & 0xff00) != (s->version & 0xff00)) 622656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 62398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* wrong version, silently discard record */ 62498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 62598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 62698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 627656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 628656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 629656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH) 630656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 63198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* record too long, silently discard it */ 63298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 63398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 63498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 635656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 636656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 637656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now s->rstate == SSL_ST_READ_BODY */ 638656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 639656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 640656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->rstate == SSL_ST_READ_BODY, get and decode the data */ 641656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 642656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > s->packet_length-DTLS1_RT_HEADER_LENGTH) 643656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 644656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now s->packet_length == DTLS1_RT_HEADER_LENGTH */ 645656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=rr->length; 646656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n=ssl3_read_n(s,i,i,1); 647656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (n <= 0) return(n); /* error or non-blocking io */ 648656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 649656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this packet contained a partial record, dump it */ 650656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( n != i) 651656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 65298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 653656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = 0; 654656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto again; 655656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 656656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 657656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now n == rr->length, 658656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and s->packet_length == DTLS1_RT_HEADER_LENGTH + rr->length */ 659656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 660656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_HEADER; /* set state for later operations */ 661656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 662656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* match epochs. NULL means the packet is dropped on the floor */ 663656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch); 664656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( bitmap == NULL) 665221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 666221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom rr->length = 0; 667221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom s->packet_length = 0; /* dump this record */ 668221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto again; /* get another record */ 669656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 670656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 671392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 672392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Only do replay check if no SCTP bio */ 673392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (!BIO_dgram_is_sctp(SSL_get_rbio(s))) 674392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 675392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 676392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Check whether this is a repeat, or aged record. 677392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * Don't check if we're listening and this message is 678392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * a ClientHello. They can look as if they're replayed, 679392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * since they arrive from different connections and 680392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * would be dropped unnecessarily. 681392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 682392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE && 683392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom *p == SSL3_MT_CLIENT_HELLO) && 684392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom !dtls1_record_replay_check(s, bitmap)) 685392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 686392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom rr->length = 0; 687392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->packet_length=0; /* dump this record */ 688392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom goto again; /* get another record */ 689392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 690392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 691392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 692392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 693656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 694656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* just read a 0 length packet */ 695656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length == 0) goto again; 696656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 697221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* If this record is from the next epoch (either HM or ALERT), 6983d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom * and a handshake is currently in progress, buffer it since it 699ee7afb3c942c4eefef6ed06201eafaf8ec58e2e3Brian Carlstrom * cannot be processed at this time. However, do not buffer 700ee7afb3c942c4eefef6ed06201eafaf8ec58e2e3Brian Carlstrom * anything while listening. 701ee7afb3c942c4eefef6ed06201eafaf8ec58e2e3Brian Carlstrom */ 702221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (is_next_epoch) 703221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 704ee7afb3c942c4eefef6ed06201eafaf8ec58e2e3Brian Carlstrom if ((SSL_in_init(s) || s->in_handshake) && !s->d1->listen) 7053d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom { 7063d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom dtls1_buffer_record(s, &(s->d1->unprocessed_rcds), rr->seq_num); 7073d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom } 708221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom rr->length = 0; 709221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom s->packet_length = 0; 710221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto again; 711221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 712656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 7133d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom if (!dtls1_process_record(s)) 7143d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom { 7153d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom rr->length = 0; 7163d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom s->packet_length = 0; /* dump this record */ 7173d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom goto again; /* get another record */ 7183d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom } 719656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 720656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 721656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 722656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 723656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 724656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Return up to 'len' payload bytes received in 'type' records. 725656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 'type' is one of the following: 726656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 727656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) 728656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) 729656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - 0 (during a shutdown, no data has to be returned) 730656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 731656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If we don't have stored data to work from, read a SSL/TLS record first 732656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (possibly multiple records if we still don't have anything to return). 733656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 734656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This function must handle any surprises the peer may have for us, such as 735656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Alert records (e.g. close_notify), ChangeCipherSpec records (not really 736656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * a surprise, but handled as if it were), or renegotiation requests. 737656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Also if record payloads contain fragments too small to process, we store 738656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * them until there is enough for the respective protocol (the record protocol 739656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * may use arbitrary fragmentation and even interleaving): 740656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Change cipher spec protocol 741656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * just 1 byte needed, no need for keeping anything stored 742656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Alert protocol 743656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2 bytes needed (AlertLevel, AlertDescription) 744656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Handshake protocol 745656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4 bytes needed (HandshakeType, uint24 length) -- we just have 746656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * to detect unexpected Client Hello and Hello Request messages 747656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * here, anything else is handled by higher layers 748656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Application data protocol 749656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * none of our business 750656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 751656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek) 752656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 753656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int al,i,j,ret; 754656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int n; 755656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_RECORD *rr; 756656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project void (*cb)(const SSL *ssl,int type2,int val)=NULL; 757656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 758656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.buf == NULL) /* Not initialized yet */ 759656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_setup_buffers(s)) 760656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 761656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 762656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XXX: check what the second '&& type' is about */ 763656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((type && (type != SSL3_RT_APPLICATION_DATA) && 764656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (type != SSL3_RT_HANDSHAKE) && type) || 765656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (peek && (type != SSL3_RT_APPLICATION_DATA))) 766656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 767656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR); 768656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return -1; 769656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 770656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 771656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check whether there's a handshake message (client hello?) waiting */ 772656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( (ret = have_handshake_fragment(s, type, buf, len, peek))) 773656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 774656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 775656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Now s->d1->handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. */ 776656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 777392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 778392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Continue handshake if it had to be interrupted to read 779392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * app data with SCTP. 780392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 781392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if ((!s->in_handshake && SSL_in_init(s)) || 782392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom (BIO_dgram_is_sctp(SSL_get_rbio(s)) && 783392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK) && 784392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->s3->in_read_app_data != 2)) 785392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#else 786656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!s->in_handshake && SSL_in_init(s)) 787392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 788656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 789656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* type == SSL3_RT_APPLICATION_DATA */ 790656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 791656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 792656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 793656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 794656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 795656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 796656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 797656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 798656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 799656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstart: 800656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 801656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 802656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->s3->rrec.type - is the type of record 803656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->s3->rrec.data, - data 804656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->s3->rrec.off, - offset into 'data' for next read 805656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->s3->rrec.length, - number of bytes. */ 806656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr = &(s->s3->rrec); 807656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 80898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* We are not handshaking and have no data yet, 80998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * so process data buffered during the last handshake 81098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * in advance, if any. 81198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 81298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (s->state == SSL_ST_OK && rr->length == 0) 81398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 81498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom pitem *item; 81598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom item = pqueue_pop(s->d1->buffered_app_data.q); 81698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (item) 81798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 818392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 819392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Restore bio_dgram_sctp_rcvinfo struct */ 820392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (BIO_dgram_is_sctp(SSL_get_rbio(s))) 821392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 822392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom DTLS1_RECORD_DATA *rdata = (DTLS1_RECORD_DATA *) item->data; 823392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_SET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo); 824392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 825392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 826392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 82798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_copy_record(s, item); 82898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 82998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom OPENSSL_free(item->data); 83098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom pitem_free(item); 83198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 83298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 83398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 83498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Check for timeout */ 83598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (dtls1_handle_timeout(s) > 0) 83698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 83798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 838656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* get new packet if necessary */ 839656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY)) 840656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 841656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret=dtls1_get_record(s); 842656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ret <= 0) 843656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 844656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = dtls1_read_failed(s, ret); 845656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* anything other than a timeout is an error */ 846656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ret <= 0) 847656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(ret); 848656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 849656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 850656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 851656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 852656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 853ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root if (s->d1->listen && rr->type != SSL3_RT_HANDSHAKE) 854ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root { 855ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root rr->length = 0; 856ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root goto start; 857ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root } 858ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root 859656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now have a packet which can be read and processed */ 860656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 861656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, 862656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * reset by ssl3_get_finished */ 863656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project && (rr->type != SSL3_RT_HANDSHAKE)) 864656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 86598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* We now have application data between CCS and Finished. 86698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * Most likely the packets were reordered on their way, so 86798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * buffer the application data for later processing rather 86898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * than dropping the connection. 86998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 8703d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom dtls1_buffer_record(s, &(s->d1->buffered_app_data), rr->seq_num); 87198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 87298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 873656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 874656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 875656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If the other end has shut down, throw anything we read away 876656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (even in 'peek' mode) */ 877656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->shutdown & SSL_RECEIVED_SHUTDOWN) 878656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 879656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length=0; 880656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 881656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 882656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 883656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 884656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 885656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (type == rr->type) /* SSL3_RT_APPLICATION_DATA or SSL3_RT_HANDSHAKE */ 886656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 887656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* make sure that we are not getting application data when we 888656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are doing a handshake for the first time */ 889656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && 890656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->enc_read_ctx == NULL)) 891656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 892656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 893656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE); 894656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 895656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 896656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 897656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len <= 0) return(len); 898656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 899656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((unsigned int)len > rr->length) 900656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = rr->length; 901656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 902656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = (unsigned int)len; 903656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 904656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(buf,&(rr->data[rr->off]),n); 905656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!peek) 906656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 907656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length-=n; 908656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->off+=n; 909656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length == 0) 910656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 911656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_HEADER; 912656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->off=0; 913656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 914656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 915392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 916392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 917392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* We were about to renegotiate but had to read 918392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * belated application data first, so retry. 919392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 920392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && 921392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom rr->type == SSL3_RT_APPLICATION_DATA && 922392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK)) 923392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 924392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->rwstate=SSL_READING; 925392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_clear_retry_flags(SSL_get_rbio(s)); 926392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_set_retry_read(SSL_get_rbio(s)); 927392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 928392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 929392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* We might had to delay a close_notify alert because 930392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * of reordered app data. If there was an alert and there 931392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * is no message to read anymore, finally set shutdown. 932392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 933392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && 934392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->d1->shutdown_received && !BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) 935392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 936392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->shutdown |= SSL_RECEIVED_SHUTDOWN; 937392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom return(0); 938392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 939392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 940656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(n); 941656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 942656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 943656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 944656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we get here, then type != rr->type; if we have a handshake 945656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * message, then it was unexpected (Hello Request or Client Hello). */ 946656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 947656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In case of record types for which we have 'fragment' storage, 948656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * fill that so that we can process the data at a fixed place. 949656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 950656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 951656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int k, dest_maxlen = 0; 952656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *dest = NULL; 953656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int *dest_len = NULL; 954656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 955656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->type == SSL3_RT_HANDSHAKE) 956656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 957656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_maxlen = sizeof s->d1->handshake_fragment; 958656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest = s->d1->handshake_fragment; 959656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_len = &s->d1->handshake_fragment_len; 960656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 961656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (rr->type == SSL3_RT_ALERT) 962656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 963656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_maxlen = sizeof(s->d1->alert_fragment); 964656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest = s->d1->alert_fragment; 965656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_len = &s->d1->alert_fragment_len; 966656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 967392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_HEARTBEATS 968392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom else if (rr->type == TLS1_RT_HEARTBEAT) 969392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 970392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom dtls1_process_heartbeat(s); 971392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 972392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Exit and notify application to read again */ 973392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom rr->length = 0; 974392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->rwstate=SSL_READING; 975392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_clear_retry_flags(SSL_get_rbio(s)); 976392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_set_retry_read(SSL_get_rbio(s)); 977392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom return(-1); 978392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 979392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 98098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* else it's a CCS message, or application data or wrong */ 98198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom else if (rr->type != SSL3_RT_CHANGE_CIPHER_SPEC) 98298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 98398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Application data while renegotiating 98498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * is allowed. Try again reading. 98598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 98698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (rr->type == SSL3_RT_APPLICATION_DATA) 98798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 98898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom BIO *bio; 98998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->s3->in_read_app_data=2; 99098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom bio=SSL_get_rbio(s); 99198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->rwstate=SSL_READING; 99298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom BIO_clear_retry_flags(bio); 99398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom BIO_set_retry_read(bio); 99498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return(-1); 99598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 996656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 99798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Not certain if this is the right error handling */ 99898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom al=SSL_AD_UNEXPECTED_MESSAGE; 99998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD); 100098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto f_err; 100198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 1002656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1003656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest_maxlen > 0) 1004656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1005656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XDTLS: In a pathalogical case, the Client Hello 1006656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * may be fragmented--don't always expect dest_maxlen bytes */ 1007656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->length < dest_maxlen) 1008656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1009e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1010e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu /* 1011e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * for normal alerts rr->length is 2, while 1012e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * dest_maxlen is 7 if we were to handle this 1013e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * non-existing alert... 1014e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu */ 1015e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu FIX ME 1016e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 1017656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_HEADER; 1018656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length = 0; 1019656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1020656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1021656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1022656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now move 'n' bytes: */ 1023656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for ( k = 0; k < dest_maxlen; k++) 1024656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1025656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest[k] = rr->data[rr->off++]; 1026656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length--; 1027656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1028656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *dest_len = dest_maxlen; 1029656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1030656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1031656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1032656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->d1->handshake_fragment_len == 12 iff rr->type == SSL3_RT_HANDSHAKE; 1033656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->d1->alert_fragment_len == 7 iff rr->type == SSL3_RT_ALERT. 1034656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) */ 1035656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1036656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we are a client, check for an incoming 'Hello Request': */ 1037656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((!s->server) && 1038656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) && 1039656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && 1040656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->session != NULL) && (s->session->cipher != NULL)) 1041656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1042656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_fragment_len = 0; 1043656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1044656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((s->d1->handshake_fragment[1] != 0) || 1045656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment[2] != 0) || 1046656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment[3] != 0)) 1047656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1048656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_DECODE_ERROR; 1049656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_HELLO_REQUEST); 1050656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1051656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1052656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1053656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* no need to check sequence number on HELLO REQUEST messages */ 1054656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1055656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1056656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 1057656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_fragment, 4, s, s->msg_callback_arg); 1058656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1059656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (SSL_is_init_finished(s) && 1060656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && 1061656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !s->s3->renegotiate) 1062656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1063ff41a4bc41ae1e1391f9b05117623ff70b985983Kenny Root s->d1->handshake_read_seq++; 1064392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->new_session = 1; 1065656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_renegotiate(s); 1066656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ssl3_renegotiate_check(s)) 1067656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1068656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 1069656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 1070656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 1071656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1072656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 1073656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1074656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1075656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1076656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!(s->mode & SSL_MODE_AUTO_RETRY)) 1077656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1078656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.left == 0) /* no read-ahead left? */ 1079656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1080656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO *bio; 1081656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In the case where we try to read application data, 1082656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * but we trigger an SSL handshake, we return -1 with 1083656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the retry option set. Otherwise renegotiation may 1084656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * cause nasty problems in the blocking world */ 1085656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_READING; 1086656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bio=SSL_get_rbio(s); 1087656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_clear_retry_flags(bio); 1088656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_set_retry_read(bio); 1089656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1090656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1091656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1092656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1093656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1094656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we either finished a handshake or ignored the request, 1095656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * now try again to obtain the (application) data we were asked for */ 1096656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1097656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1098656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1099656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->d1->alert_fragment_len >= DTLS1_AL_HEADER_LENGTH) 1100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int alert_level = s->d1->alert_fragment[0]; 1102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int alert_descr = s->d1->alert_fragment[1]; 1103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->alert_fragment_len = 0; 1105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(0, s->version, SSL3_RT_ALERT, 1108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->alert_fragment, 2, s, s->msg_callback_arg); 1109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->info_callback != NULL) 1111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->info_callback; 1112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (s->ctx->info_callback != NULL) 1113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->ctx->info_callback; 1114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (cb != NULL) 1116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project j = (alert_level << 8) | alert_descr; 1118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb(s, SSL_CB_READ_ALERT, j); 1119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (alert_level == 1) /* warning */ 1122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->warn_alert = alert_descr; 1124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (alert_descr == SSL_AD_CLOSE_NOTIFY) 1125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1126392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 1127392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* With SCTP and streams the socket may deliver app data 1128392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * after a close_notify alert. We have to check this 1129392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * first so that nothing gets discarded. 1130392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 1131392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && 1132392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) 1133392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom { 1134392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->d1->shutdown_received = 1; 1135392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->rwstate=SSL_READING; 1136392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_clear_retry_flags(SSL_get_rbio(s)); 1137392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_set_retry_read(SSL_get_rbio(s)); 1138392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom return -1; 1139392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom } 1140392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 1141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->shutdown |= SSL_RECEIVED_SHUTDOWN; 1142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 1143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XXX: this is a possible improvement in the future */ 1146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now check if it's a missing record */ 1147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (alert_descr == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) 1148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short seq; 1150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int frag_off; 1151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *p = &(s->d1->alert_fragment[2]); 1152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2s(p, seq); 1154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2l3(p, frag_off); 1155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 115698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_retransmit_message(s, 115798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_get_queue_priority(frag->msg_header.seq, 0), 115898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom frag_off, &found); 1159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( ! found && SSL_in_init(s)) 1160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* fprintf( stderr,"in init = %d\n", SSL_in_init(s)); */ 1162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* requested a message not yet sent, 1163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project send an alert ourselves */ 1164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_send_alert(s,SSL3_AL_WARNING, 1165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (alert_level == 2) /* fatal */ 1171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project char tmp[16]; 1173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 1175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->fatal_alert = alert_descr; 1176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); 1177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_snprintf(tmp,sizeof tmp,"%d",alert_descr); 1178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ERR_add_error_data(2,"SSL alert number ",tmp); 1179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->shutdown|=SSL_RECEIVED_SHUTDOWN; 1180656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_CTX_remove_session(s->ctx,s->session); 1181656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 1182656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1183656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_ILLEGAL_PARAMETER; 1186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE); 1187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->shutdown & SSL_SENT_SHUTDOWN) /* but we have not received a shutdown */ 1194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 1196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length=0; 1197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 1198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1199656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1200656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC) 1201656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1202656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct ccs_header_st ccs_hdr; 120398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom unsigned int ccs_hdr_len = DTLS1_CCS_HEADER_LENGTH; 1204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1205656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_ccs_header(rr->data, &ccs_hdr); 1206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1207221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (s->version == DTLS1_BAD_VER) 1208221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom ccs_hdr_len = 3; 1209221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 1210656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* 'Change Cipher Spec' is just a single byte, so we know 1211656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * exactly what the record payload has to look like */ 1212656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XDTLS: check that epoch is consistent */ 1213221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if ( (rr->length != ccs_hdr_len) || 1214221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS)) 1215656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1216656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=SSL_AD_ILLEGAL_PARAMETER; 1217656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC); 1218656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1219656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1220656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1221656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length=0; 1222656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1223656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1224656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC, 1225656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->data, 1, s, s->msg_callback_arg); 1226656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 122798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* We can't process a CCS now, because previous handshake 122898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * messages are still missing, so just drop it. 122998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 123098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (!s->d1->change_cipher_spec_ok) 123198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 123298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 123398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 123498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 123598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->d1->change_cipher_spec_ok = 0; 123698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 1237656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->change_cipher_spec=1; 1238656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_do_change_cipher_spec(s)) 1239656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1240656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1241656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* do this whenever CCS is processed */ 1242656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_reset_seq_numbers(s, SSL3_CC_READ); 1243656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1244221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (s->version == DTLS1_BAD_VER) 1245656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_read_seq++; 1246656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1247392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 1248392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Remember that a CCS has been received, 1249392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * so that an old key of SCTP-Auth can be 1250392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * deleted when a CCS is sent. Will be ignored 1251392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * if no SCTP is used 1252392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 1253392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL); 1254392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 1255392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom 1256656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1257656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1258656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1259656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Unexpected handshake message (Client Hello, or protocol violation) */ 1260656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((s->d1->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) && 1261656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !s->in_handshake) 1262656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1263656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct hm_header_st msg_hdr; 1264656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1265656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this may just be a stale retransmit */ 1266656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_message_header(rr->data, &msg_hdr); 1267656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if( rr->epoch != s->d1->r_epoch) 1268656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1269656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length = 0; 1270656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1271656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1272656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 127398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* If we are server, we may have a repeated FINISHED of the 127498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * client here, then retransmit our CCS and FINISHED. 127598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 127698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (msg_hdr.type == SSL3_MT_FINISHED) 127798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 127821c841450af61d0a9119cdc863e93d019127bfe1Brian Carlstrom if (dtls1_check_timeout_num(s) < 0) 127921c841450af61d0a9119cdc863e93d019127bfe1Brian Carlstrom return -1; 128021c841450af61d0a9119cdc863e93d019127bfe1Brian Carlstrom 128198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_retransmit_buffered_messages(s); 128298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 128398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 128498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 128598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 1286656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (((s->state&SSL_ST_MASK) == SSL_ST_OK) && 1287656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) 1288656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1289656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 /* worked only because C operator preferences are not as expected (and 1290656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * because this is not really needed for clients except for detecting 1291656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * protocol violations): */ 1292656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->state=SSL_ST_BEFORE|(s->server) 1293656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ?SSL_ST_ACCEPT 1294656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project :SSL_ST_CONNECT; 1295656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#else 1296656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT; 1297656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1298392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom s->renegotiate=1; 1299656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->new_session=1; 1300656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1301656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 1302656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 1303656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 1304656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1305656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 1306656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1307656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1308656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1309656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!(s->mode & SSL_MODE_AUTO_RETRY)) 1310656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1311656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.left == 0) /* no read-ahead left? */ 1312656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1313656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO *bio; 1314656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In the case where we try to read application data, 1315656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * but we trigger an SSL handshake, we return -1 with 1316656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the retry option set. Otherwise renegotiation may 1317656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * cause nasty problems in the blocking world */ 1318656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_READING; 1319656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bio=SSL_get_rbio(s); 1320656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_clear_retry_flags(bio); 1321656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_set_retry_read(bio); 1322656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1323656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1324656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1325656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1326656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1327656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1328656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project switch (rr->type) 1329656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1330656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project default: 1331656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifndef OPENSSL_NO_TLS 1332656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* TLS just ignores unknown message types */ 1333656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->version == TLS1_VERSION) 1334656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1335656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length = 0; 1336656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1337656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1338656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1339656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 1340656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD); 1341656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1342656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_CHANGE_CIPHER_SPEC: 1343656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_ALERT: 1344656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_HANDSHAKE: 1345656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we already handled all of these, with the possible exception 1346656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * of SSL3_RT_HANDSHAKE when s->in_handshake is set, but that 1347656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * should not happen when type != rr->type */ 1348656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 1349656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,ERR_R_INTERNAL_ERROR); 1350656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1351656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_APPLICATION_DATA: 1352656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* At this point, we were expecting handshake data, 1353656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * but have application data. If the library was 1354656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * running inside ssl3_read() (i.e. in_read_app_data 1355656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * is set) and it makes sense to read application data 1356656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * at this point (session renegotiation not yet started), 1357656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * we will indulge it. 1358656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 1359656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->in_read_app_data && 1360656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->s3->total_renegotiations != 0) && 1361656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (( 1362656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state & SSL_ST_CONNECT) && 1363656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state >= SSL3_ST_CW_CLNT_HELLO_A) && 1364656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state <= SSL3_ST_CR_SRVR_HELLO_A) 1365656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ) || ( 1366656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state & SSL_ST_ACCEPT) && 1367656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state <= SSL3_ST_SW_HELLO_REQ_A) && 1368656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state >= SSL3_ST_SR_CLNT_HELLO_A) 1369656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ) 1370656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project )) 1371656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1372656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->in_read_app_data=2; 1373656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1374656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1375656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1376656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1377656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 1378656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD); 1379656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1380656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1381656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1382656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* not reached */ 1383656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1384656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectf_err: 1385656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_send_alert(s,SSL3_AL_FATAL,al); 1386656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 1387656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1388656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1389656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1390656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint 1391656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, int len) 1392656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1393656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i; 1394656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1395392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#ifndef OPENSSL_NO_SCTP 1396392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom /* Check if we have to continue an interrupted handshake 1397392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom * for reading belated app data with SCTP. 1398392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom */ 1399392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if ((SSL_in_init(s) && !s->in_handshake) || 1400392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom (BIO_dgram_is_sctp(SSL_get_wbio(s)) && 1401392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK))) 1402392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#else 1403392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom if (SSL_in_init(s) && !s->in_handshake) 1404392aa7cc7d2b122614c5393c3e357da07fd07af3Brian Carlstrom#endif 1405656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1406656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 1407656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 1408656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 1409656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1410656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 1411656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return -1; 1412656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1413656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1414656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 141598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (len > SSL3_RT_MAX_PLAIN_LENGTH) 1416656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 141798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,SSL_R_DTLS_MESSAGE_TOO_BIG); 141898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return -1; 1419656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1420656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 142198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom i = dtls1_write_bytes(s, type, buf_, len); 142298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return i; 1423656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1424656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1425656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1426656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this only happens when a client hello is received and a handshake 1427656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * is started. */ 1428656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 1429656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecthave_handshake_fragment(SSL *s, int type, unsigned char *buf, 1430656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int len, int peek) 1431656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1432656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1433656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((type == SSL3_RT_HANDSHAKE) && (s->d1->handshake_fragment_len > 0)) 1434656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* (partially) satisfy request from storage */ 1435656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1436656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *src = s->d1->handshake_fragment; 1437656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *dst = buf; 1438656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int k,n; 1439656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1440656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* peek == 0 */ 1441656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = 0; 1442656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while ((len > 0) && (s->d1->handshake_fragment_len > 0)) 1443656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1444656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *dst++ = *src++; 1445656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project len--; s->d1->handshake_fragment_len--; 1446656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n++; 1447656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1448656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* move any remaining fragment bytes: */ 1449656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (k = 0; k < s->d1->handshake_fragment_len; k++) 1450656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_fragment[k] = *src++; 1451656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return n; 1452656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1453656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1454656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1455656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1456656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1457656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1458656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1459656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1460656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Call this to write data in records of type 'type' 1461656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * It will return <= 0 if not all data has been sent or non-blocking IO. 1462656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 146398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstromint dtls1_write_bytes(SSL *s, int type, const void *buf, int len) 1464656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1465656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i; 1466656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 146798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom OPENSSL_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH); 1468656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 1469e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langley i=do_dtls1_write(s, type, buf, len); 1470e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu return i; 1471656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1472656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1473e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langleystatic int do_dtls1_write(SSL *s, int type, const unsigned char *buf, 1474e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langley unsigned int len) 1475656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1476656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *p,*pseq; 1477656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,mac_size,clear=0; 1478656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int prefix_len = 0; 1479656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_RECORD *wr; 1480656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_BUFFER *wb; 1481656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_SESSION *sess; 1482656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int bs; 1483656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1484656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* first check if there is a SSL3_BUFFER still being written 1485656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * out. This will happen with non blocking IO */ 1486656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->wbuf.left != 0) 1487656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1488656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_assert(0); /* XDTLS: want to see if we ever get here */ 1489656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(ssl3_write_pending(s,type,buf,len)); 1490656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1491656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1492656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we have an alert to send, lets send it */ 1493656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->alert_dispatch) 1494656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1495656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->method->ssl_dispatch_alert(s); 1496656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) 1497656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(i); 1498656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* if it went, fall through and send more stuff */ 1499656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1500656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1501e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langley if (len == 0) 1502656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1503656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1504656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr= &(s->s3->wrec); 1505656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wb= &(s->s3->wbuf); 1506656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project sess=s->session; 1507656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1508656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( (sess == NULL) || 1509656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->enc_write_ctx == NULL) || 1510221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom (EVP_MD_CTX_md(s->write_hash) == NULL)) 1511656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project clear=1; 1512656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1513656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (clear) 1514656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project mac_size=0; 1515656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1516221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 1517221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom mac_size=EVP_MD_CTX_size(s->write_hash); 1518221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (mac_size < 0) 1519221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto err; 1520221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 1521656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1522656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p = wb->buf + prefix_len; 1523656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1524656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* write the header */ 1525656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1526656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *(p++)=type&0xff; 1527656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->type=type; 1528656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1529221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom *(p++)=(s->version>>8); 1530221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom *(p++)=s->version&0xff; 1531656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1532656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* field where we are to write out packet epoch, seq num and len */ 1533656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pseq=p; 1534656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p+=10; 1535656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1536656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* lets setup the record stuff. */ 1537656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1538656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Make space for the explicit IV in case of CBC. 1539656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (this is a bit of a boundary violation, but what the heck). 1540656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 1541656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( s->enc_write_ctx && 1542656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (EVP_CIPHER_mode( s->enc_write_ctx->cipher ) & EVP_CIPH_CBC_MODE)) 1543656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bs = EVP_CIPHER_block_size(s->enc_write_ctx->cipher); 1544656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1545656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bs = 0; 1546656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1547656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->data=p + bs; /* make room for IV in case of CBC */ 1548656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length=(int)len; 1549656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->input=(unsigned char *)buf; 1550656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1551656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now 'read' from wr->input, wr->length bytes into 1552656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->data */ 1553656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1554656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* first we compress */ 1555656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->compress != NULL) 1556656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1557656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_do_compress(s)) 1558656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1559656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DO_DTLS1_WRITE,SSL_R_COMPRESSION_FAILURE); 1560656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1561656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1562656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1563656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1564656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1565656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(wr->data,wr->input,wr->length); 1566656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->input=wr->data; 1567656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1568656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1569656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we should still have the output to wr->data and the input 1570656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * from wr->input. Length should be wr->length. 1571656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->data still points in the wb->buf */ 1572656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1573656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (mac_size != 0) 1574656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1575221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if(s->method->ssl3_enc->mac(s,&(p[wr->length + bs]),1) < 0) 1576221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto err; 1577656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length+=mac_size; 1578656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1579656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1580656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this is true regardless of mac size */ 1581656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->input=p; 1582656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->data=p; 1583656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1584656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1585656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* ssl3_enc can only have an error on read */ 1586656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (bs) /* bs != 0 in case of CBC */ 1587656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1588656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project RAND_pseudo_bytes(p,bs); 1589656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* master IV and last CBC residue stand for 1590656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the rest of randomness */ 1591656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length += bs; 1592656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1593656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1594656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->method->ssl3_enc->enc(s,1); 1595656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1596656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* record length after mac and block padding */ 1597656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* if (type == SSL3_RT_APPLICATION_DATA || 1598656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (type == SSL3_RT_ALERT && ! SSL_in_init(s))) */ 1599656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1600656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* there's only one epoch between handshake and app data */ 1601656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1602656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->w_epoch, pseq); 1603656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1604656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XDTLS: ?? */ 1605656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* else 1606656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->handshake_epoch, pseq); */ 1607656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1608656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(pseq, &(s->s3->write_sequence[2]), 6); 1609656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pseq+=6; 1610656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(wr->length,pseq); 1611656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1612656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we should now have 1613656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->data pointing to the encrypted data, which is 1614656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->length long */ 1615656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->type=type; /* not needed but helps for debugging */ 1616656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length+=DTLS1_RT_HEADER_LENGTH; 1617656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1618656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 /* this is now done at the message layer */ 1619656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* buffer the record, making it easy to handle retransmits */ 1620656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( type == SSL3_RT_HANDSHAKE || type == SSL3_RT_CHANGE_CIPHER_SPEC) 1621656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_buffer_record(s, wr->data, wr->length, 1622656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *((PQ_64BIT *)&(s->s3->write_sequence[0]))); 1623656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1624656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1625656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_record_sequence_update(&(s->s3->write_sequence[0])); 1626656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1627656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now let's set up wb */ 1628656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wb->left = prefix_len + wr->length; 1629656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wb->offset = 0; 1630656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1631656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* memorize arguments so that ssl3_write_pending can detect bad write retries later */ 1632656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_tot=len; 1633656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_buf=buf; 1634656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_type=type; 1635656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_ret=len; 1636656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1637656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now just need to write the buffer */ 1638656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ssl3_write_pending(s,type,buf,len); 1639656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 1640656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return -1; 1641656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1642656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1643656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1644656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1645221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromstatic int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap) 1646656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1647221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int cmp; 1648221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom unsigned int shift; 1649221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom const unsigned char *seq = s->s3->read_sequence; 1650656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1651221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom cmp = satsub64be(seq,bitmap->max_seq_num); 1652221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (cmp > 0) 1653656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1654221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy (s->s3->rrec.seq_num,seq,8); 1655221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return 1; /* this record in new */ 1656656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1657221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom shift = -cmp; 1658221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (shift >= sizeof(bitmap->map)*8) 1659221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return 0; /* stale, outside the window */ 1660221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else if (bitmap->map & (1UL<<shift)) 1661656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; /* record previously received */ 1662221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 1663221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy (s->s3->rrec.seq_num,seq,8); 1664656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 1665656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1666656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1667656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1668656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap) 1669656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1670221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int cmp; 1671656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int shift; 1672221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom const unsigned char *seq = s->s3->read_sequence; 1673656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1674221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom cmp = satsub64be(seq,bitmap->max_seq_num); 1675221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (cmp > 0) 1676656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1677221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom shift = cmp; 1678221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (shift < sizeof(bitmap->map)*8) 1679221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom bitmap->map <<= shift, bitmap->map |= 1UL; 1680221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else 1681221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom bitmap->map = 1UL; 1682221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy(bitmap->max_seq_num,seq,8); 1683656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1684221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else { 1685221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom shift = -cmp; 1686221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (shift < sizeof(bitmap->map)*8) 1687221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom bitmap->map |= 1UL<<shift; 1688656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1689656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1690656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1691656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1692656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint dtls1_dispatch_alert(SSL *s) 1693656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1694656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,j; 1695656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project void (*cb)(const SSL *ssl,int type,int val)=NULL; 1696e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu unsigned char buf[DTLS1_AL_HEADER_LENGTH]; 1697656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *ptr = &buf[0]; 1698656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1699656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->alert_dispatch=0; 1700656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1701656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(buf, 0x00, sizeof(buf)); 1702656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *ptr++ = s->s3->send_alert[0]; 1703656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *ptr++ = s->s3->send_alert[1]; 1704656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1705e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1706656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) 1707656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1708656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->handshake_read_seq, ptr); 1709656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1710656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( s->d1->r_msg_hdr.frag_off == 0) /* waiting for a new msg */ 1711656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1712656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1713656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->r_msg_hdr.seq, ptr); /* partial msg read */ 1714656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1715656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1716656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1717656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project fprintf(stderr, "s->d1->handshake_read_seq = %d, s->d1->r_msg_hdr.seq = %d\n",s->d1->handshake_read_seq,s->d1->r_msg_hdr.seq); 1718656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1719656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project l2n3(s->d1->r_msg_hdr.frag_off, ptr); 1720656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1721e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 1722656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1723e6443cd9084e98ea362375c3f177a0eab7aa8fdcAdam Langley i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf)); 1724656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) 1725656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1726656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->alert_dispatch=1; 1727656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* fprintf( stderr, "not done with alert\n" ); */ 1728656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1729656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1730656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1731e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu if (s->s3->send_alert[0] == SSL3_AL_FATAL 1732e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1733e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1734e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 1735221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom ) 1736656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (void)BIO_flush(s->wbio); 1737656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1738656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1739656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 1740656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 2, s, s->msg_callback_arg); 1741656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1742656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->info_callback != NULL) 1743656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->info_callback; 1744656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (s->ctx->info_callback != NULL) 1745656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->ctx->info_callback; 1746656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1747656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (cb != NULL) 1748656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1749656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1]; 1750656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb(s,SSL_CB_WRITE_ALERT,j); 1751656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1752656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1753656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(i); 1754656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1755656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1756656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1757656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic DTLS1_BITMAP * 1758656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch) 1759656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1760656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1761656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *is_next_epoch = 0; 1762656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1763656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In current epoch, accept HM, CCS, DATA, & ALERT */ 1764656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->epoch == s->d1->r_epoch) 1765656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return &s->d1->bitmap; 1766656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1767656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Only HM and ALERT messages can be from the next epoch */ 1768656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (rr->epoch == (unsigned long)(s->d1->r_epoch + 1) && 1769656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (rr->type == SSL3_RT_HANDSHAKE || 1770656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type == SSL3_RT_ALERT)) 1771656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1772656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *is_next_epoch = 1; 1773656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return &s->d1->next_bitmap; 1774656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1775656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1776656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 1777656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1778656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1779656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1780656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 1781656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_record_needs_buffering(SSL *s, SSL3_RECORD *rr, unsigned short *priority, 1782656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned long *offset) 1783656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1784656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1785656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* alerts are passed up immediately */ 1786656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->type == SSL3_RT_APPLICATION_DATA || 1787656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type == SSL3_RT_ALERT) 1788656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1789656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1790656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Only need to buffer if a handshake is underway. 1791656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (this implies that Hello Request and Client Hello are passed up 1792656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * immediately) */ 1793656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( SSL_in_init(s)) 1794656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1795656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *data = rr->data; 1796656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* need to extract the HM/CCS sequence number here */ 1797656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->type == SSL3_RT_HANDSHAKE || 1798656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type == SSL3_RT_CHANGE_CIPHER_SPEC) 1799656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1800656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short seq_num; 1801656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct hm_header_st msg_hdr; 1802656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct ccs_header_st ccs_hdr; 1803656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1804656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->type == SSL3_RT_HANDSHAKE) 1805656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1806656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_message_header(data, &msg_hdr); 1807656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq_num = msg_hdr.seq; 1808656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *offset = msg_hdr.frag_off; 1809656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1810656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1811656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1812656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_ccs_header(data, &ccs_hdr); 1813656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq_num = ccs_hdr.seq; 1814656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *offset = 0; 1815656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1816656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1817656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this is either a record we're waiting for, or a 1818656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * retransmit of something we happened to previously 1819656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * receive (higher layers will drop the repeat silently */ 1820656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( seq_num < s->d1->handshake_read_seq) 1821656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1822656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->type == SSL3_RT_HANDSHAKE && 1823656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq_num == s->d1->handshake_read_seq && 1824656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project msg_hdr.frag_off < s->d1->r_msg_hdr.frag_off) 1825656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1826656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if ( seq_num == s->d1->handshake_read_seq && 1827656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC || 1828656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project msg_hdr.frag_off == s->d1->r_msg_hdr.frag_off)) 1829656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1830656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1831656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1832656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *priority = seq_num; 1833656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 1834656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1835656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1836656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else /* unknown record type */ 1837656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1838656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1839656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1840656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1841656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1842656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1843656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1844656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectvoid 1845656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_reset_seq_numbers(SSL *s, int rw) 1846656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1847656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *seq; 1848656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int seq_bytes = sizeof(s->s3->read_sequence); 1849656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1850656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rw & SSL3_CC_READ) 1851656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1852656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq = s->s3->read_sequence; 1853656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->r_epoch++; 1854221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy(&(s->d1->bitmap), &(s->d1->next_bitmap), sizeof(DTLS1_BITMAP)); 1855656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->d1->next_bitmap), 0x00, sizeof(DTLS1_BITMAP)); 1856656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1857656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1858656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1859656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq = s->s3->write_sequence; 186098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom memcpy(s->d1->last_write_sequence, seq, sizeof(s->s3->write_sequence)); 1861656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->w_epoch++; 1862656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1863656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1864656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(seq, 0x00, seq_bytes); 1865656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1866