d1_pkt.c revision 3d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30d
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); 182656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void dtls1_clear_timeouts(SSL *s); 183656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* copy buffered record into SSL structure */ 185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_copy_record(SSL *s, pitem *item) 187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_RECORD_DATA *rdata; 189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = (DTLS1_RECORD_DATA *)item->data; 191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.buf != NULL) 193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(s->s3->rbuf.buf); 194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet = rdata->packet; 196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = rdata->packet_length; 197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rbuf), &(rdata->rbuf), sizeof(SSL3_BUFFER)); 198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rrec), &(rdata->rrec), sizeof(SSL3_RECORD)); 1993d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom 2003d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom /* Set proper sequence number for mac calculation */ 2013d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom memcpy(&(s->s3->read_sequence[2]), &(rdata->packet[5]), 6); 202656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 203656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 205656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 207656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 208221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromdtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority) 209221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 210221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom DTLS1_RECORD_DATA *rdata; 211656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 212656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 21398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Limit the size of the queue to prevent DOS attacks */ 21498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (pqueue_size(queue->q) >= 100) 21598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return 0; 21698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 217656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = OPENSSL_malloc(sizeof(DTLS1_RECORD_DATA)); 218221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom item = pitem_new(priority, rdata); 219656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rdata == NULL || item == NULL) 220656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 221656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rdata != NULL) OPENSSL_free(rdata); 222656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item != NULL) pitem_free(item); 223656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 224656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); 225656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 226656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 227656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 228656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata->packet = s->packet; 229656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata->packet_length = s->packet_length; 230656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(rdata->rbuf), &(s->s3->rbuf), sizeof(SSL3_BUFFER)); 231656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(rdata->rrec), &(s->s3->rrec), sizeof(SSL3_RECORD)); 232656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 233656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item->data = rdata; 234656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 235656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* insert should not fail, since duplicates are dropped */ 236656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (pqueue_insert(queue->q, item) == NULL) 237656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 238656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(rdata); 239656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 240656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 241656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 242656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 243656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet = NULL; 244656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = 0; 245656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->s3->rbuf), 0, sizeof(SSL3_BUFFER)); 246656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->s3->rrec), 0, sizeof(SSL3_RECORD)); 247656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 248656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_setup_buffers(s)) 249656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 250656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); 251656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(rdata); 252656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 253656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 254656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 255656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 256656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 257221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 258656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 259656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 260656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 261656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue) 262656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 263656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 264656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 265656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_pop(queue->q); 266656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item) 267656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 268656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_copy_record(s, item); 269656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 270656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(item->data); 271656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 272656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 273656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 274656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 275656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 276656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 277656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 278656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 279656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 280656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* retrieve a buffered record that belongs to the new epoch, i.e., not processed 281656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * yet */ 282656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define dtls1_get_unprocessed_record(s) \ 283656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_retrieve_buffered_record((s), \ 284656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project &((s)->d1->unprocessed_rcds)) 285656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 286656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* retrieve a buffered record that belongs to the current epoch, ie, processed */ 287656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define dtls1_get_processed_record(s) \ 288656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_retrieve_buffered_record((s), \ 289656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project &((s)->d1->processed_rcds)) 290656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 291656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 292656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_process_buffered_records(SSL *s) 293656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 294656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 295656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 296656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_peek(s->d1->unprocessed_rcds.q); 297656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item) 298656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 299656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_RECORD_DATA *rdata; 300656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = (DTLS1_RECORD_DATA *)item->data; 301656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 302656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Check if epoch is current. */ 303656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->d1->unprocessed_rcds.epoch != s->d1->r_epoch) 304656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); /* Nothing to do. */ 305656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 306656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Process all the records. */ 307656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while (pqueue_peek(s->d1->unprocessed_rcds.q)) 308656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 309656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_unprocessed_record(s); 310656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( ! dtls1_process_record(s)) 311656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 312656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_buffer_record(s, &(s->d1->processed_rcds), 313221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom s->s3->rrec.seq_num); 314656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 315656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 316656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 317656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* sync epoch numbers once all the unprocessed records 318656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * have been processed */ 319656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->processed_rcds.epoch = s->d1->r_epoch; 320656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->unprocessed_rcds.epoch = s->d1->r_epoch + 1; 321656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 322656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 323656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 324656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 325656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 326656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 327656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 328656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 329656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_get_buffered_record(SSL *s) 330656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 331656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem *item; 332656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project PQ_64BIT priority = 333656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (((PQ_64BIT)s->d1->handshake_read_seq) << 32) | 334656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ((PQ_64BIT)s->d1->r_msg_hdr.frag_off); 335656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 336656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( ! SSL_in_init(s)) /* if we're not (re)negotiating, 337656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project nothing buffered */ 338656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 339656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 340656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 341656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_peek(s->d1->rcvd_records); 342656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (item && item->priority == priority) 343656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 344656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Check if we've received the record of interest. It must be 345656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * a handshake record, since data records as passed up without 346656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * buffering */ 347656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_RECORD_DATA *rdata; 348656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project item = pqueue_pop(s->d1->rcvd_records); 349656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rdata = (DTLS1_RECORD_DATA *)item->data; 350656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 351656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.buf != NULL) 352656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(s->s3->rbuf.buf); 353656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 354656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet = rdata->packet; 355656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = rdata->packet_length; 356656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rbuf), &(rdata->rbuf), sizeof(SSL3_BUFFER)); 357656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->rrec), &(rdata->rrec), sizeof(SSL3_RECORD)); 358656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 359656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_free(item->data); 360656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pitem_free(item); 361656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 362656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->d1->next_expected_seq_num++; */ 363656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 364656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 365656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 366656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 367656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 368656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 369656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 370656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 371656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 372656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_process_record(SSL *s) 373656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ 374221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int i,al; 375656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int clear=0; 376221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int enc_err; 377656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_SESSION *sess; 378221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom SSL3_RECORD *rr; 379656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int mac_size; 380656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char md[EVP_MAX_MD_SIZE]; 381656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 382656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 383656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr= &(s->s3->rrec); 384221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom sess = s->session; 385656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 386656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* At this point, s->packet_length == SSL3_RT_HEADER_LNGTH + rr->length, 387656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and we have that many bytes in s->packet 388656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 389656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->input= &(s->packet[DTLS1_RT_HEADER_LENGTH]); 390656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 391656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* ok, we can now read from 's->packet' data into 'rr' 392656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * rr->input points at rr->length bytes, which 393656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * need to be copied into rr->data by either 394656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the decryption or by the decompression 395656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * When the data is 'copied' into the rr->data buffer, 396656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * rr->input will be pointed at the new buffer */ 397656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 398656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* We now have - encrypted [ MAC [ compressed [ plain ] ] ] 399656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * rr->length bytes of encrypted compressed stuff. */ 400656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 401656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check is not needed I believe */ 402656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH) 403656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 404656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 405656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG); 406656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 407656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 408656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 409656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* decrypt in place in 'rr->input' */ 410656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->data=rr->input; 411656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 412656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project enc_err = s->method->ssl3_enc->enc(s,0); 413656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (enc_err <= 0) 414656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 415656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (enc_err == 0) 416656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* SSLerr() and ssl3_send_alert() have been called */ 417656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 418656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 419656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* otherwise enc_err == -1 */ 4203d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom goto err; 421656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 422656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 423656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef TLS_DEBUG 424656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectprintf("dec %d\n",rr->length); 425656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); } 426656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectprintf("\n"); 427656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 428656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 429656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* r->length is now the compressed data plus mac */ 430221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if ( (sess == NULL) || 431656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->enc_read_ctx == NULL) || 432656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->read_hash == NULL)) 433221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom clear=1; 434656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 435656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!clear) 436656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 437221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* !clear => s->read_hash != NULL => mac_size != -1 */ 438221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int t; 439221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom t=EVP_MD_CTX_size(s->read_hash); 440221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom OPENSSL_assert(t >= 0); 441221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom mac_size=t; 442656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 443656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+mac_size) 444656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 445656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 /* OK only for stream ciphers (then rr->length is visible from ciphertext anyway) */ 446656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 447656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG); 448656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 449656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#else 4503d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom goto err; 451656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 452656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 453656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check the MAC for rr->input (it's in mac_size bytes at the tail) */ 454656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length < mac_size) 455656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 456656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 /* OK only for stream ciphers */ 457656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_DECODE_ERROR; 458656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_LENGTH_TOO_SHORT); 459656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 460656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#else 4613d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom goto err; 462656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 463656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 464656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length-=mac_size; 465656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->method->ssl3_enc->mac(s,md,0); 466221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (i < 0 || memcmp(md,&(rr->data[rr->length]),mac_size) != 0) 467656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 4683d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom goto err; 469656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 470656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 471656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 472656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* r->length is now just compressed */ 473656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->expand != NULL) 474656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 475656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH) 476656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 477656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 478656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG); 479656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 480656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 481656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_do_uncompress(s)) 482656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 483656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_DECOMPRESSION_FAILURE; 484656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_BAD_DECOMPRESSION); 485656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 486656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 487656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 488656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 489656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH) 490656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 491656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_RECORD_OVERFLOW; 492656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_DATA_LENGTH_TOO_LONG); 493656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 494656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 495656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 496656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->off=0; 497656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* So at this point the following is true 498656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.type is the type of record 499656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.length == number of bytes in record 500656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.off == offset to first valid byte 501656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.data == where to take bytes from, increment 502656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * after use :-). 503656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 504656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 505656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we have pulled in a full packet so zero things */ 506656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length=0; 507221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom dtls1_record_bitmap_update(s, &(s->d1->bitmap));/* Mark receipt of record. */ 508221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return(1); 509656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 510656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectf_err: 511656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_send_alert(s,SSL3_AL_FATAL,al); 512656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 513656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 514656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 515656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 516656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 517656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Call this to get a new input record. 518656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * It will return <= 0 if more data is needed, normally due to an error 519656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * or non-blocking IO. 520656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * When it finishes, one packet has been decoded and can be found in 521656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.type - is the type of record 522656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.data, - data 523656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ssl->s3->rrec.length, - number of bytes 524656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 525656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* used only by dtls1_read_bytes */ 526656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint dtls1_get_record(SSL *s) 527656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 52898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom int ssl_major,ssl_minor; 529656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,n; 530656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_RECORD *rr; 531656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_SESSION *sess; 53298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom unsigned char *p = NULL; 533656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short version; 534656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_BITMAP *bitmap; 535656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int is_next_epoch; 536656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 537656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr= &(s->s3->rrec); 538656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project sess=s->session; 539656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 540221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* The epoch may have changed. If so, process all the 541221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom * pending records. This is a non-blocking operation. */ 5423d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom dtls1_process_buffered_records(s); 543656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 544656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* if we're renegotiating, then there may be buffered records */ 545656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dtls1_get_processed_record(s)) 546656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 547656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 548656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* get something from the wire */ 549656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectagain: 550656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check if we have the header */ 551656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( (s->rstate != SSL_ST_READ_BODY) || 552656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->packet_length < DTLS1_RT_HEADER_LENGTH)) 553656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 554656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n=ssl3_read_n(s, DTLS1_RT_HEADER_LENGTH, s->s3->rbuf.len, 0); 555656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* read timeout is handled by dtls1_read_bytes */ 556656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (n <= 0) return(n); /* error or non-blocking */ 557656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 55898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* this packet contained a partial record, dump it */ 55998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (s->packet_length != DTLS1_RT_HEADER_LENGTH) 56098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 56198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 56298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 56398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 564656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 565656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_BODY; 566656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 567656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p=s->packet; 568656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 569656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Pull apart the header into the DTLS1_RECORD */ 570656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type= *(p++); 571656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl_major= *(p++); 572656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl_minor= *(p++); 573656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project version=(ssl_major<<8)|ssl_minor; 574656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 575656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* sequence number is 64 bits, with top 2 bytes = epoch */ 576656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2s(p,rr->epoch); 577656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 578656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(&(s->s3->read_sequence[2]), p, 6); 579656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p+=6; 580656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 581656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2s(p,rr->length); 582656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 583656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Lets check version */ 584656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!s->first_packet) 585656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 586221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (version != s->version) 587656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 58898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* unexpected version, silently discard */ 58998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 59098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 59198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 592656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 593656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 594656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 595221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if ((version & 0xff00) != (s->version & 0xff00)) 596656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 59798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* wrong version, silently discard record */ 59898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 59998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 60098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 601656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 602656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 603656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH) 604656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 60598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* record too long, silently discard it */ 60698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 60798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->packet_length = 0; 60898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto again; 609656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 610656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 6111fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu /* If we receive a valid record larger than the current buffer size, 6121fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu * allocate some memory for it. 6131fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu */ 6141fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu if (rr->length > s->s3->rbuf.len - DTLS1_RT_HEADER_LENGTH) 6151fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu { 61699ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom unsigned char *pp; 61799ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom unsigned int newlen = rr->length + DTLS1_RT_HEADER_LENGTH; 61899ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom if ((pp=OPENSSL_realloc(s->s3->rbuf.buf, newlen))==NULL) 6191fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu { 6201fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu SSLerr(SSL_F_DTLS1_GET_RECORD,ERR_R_MALLOC_FAILURE); 62199ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom return(-1); 6221fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu } 62399ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom p = pp + (p - s->s3->rbuf.buf); 62499ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom s->s3->rbuf.buf=pp; 62599ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom s->s3->rbuf.len=newlen; 6261fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu s->packet= &(s->s3->rbuf.buf[0]); 6271fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu } 6281fada29eaaa2a758ba3f68ee9ede8b6715673146Nagendra Modadugu 629656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now s->rstate == SSL_ST_READ_BODY */ 630656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 631656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 632656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->rstate == SSL_ST_READ_BODY, get and decode the data */ 633656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 634656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length > s->packet_length-DTLS1_RT_HEADER_LENGTH) 635656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 636656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now s->packet_length == DTLS1_RT_HEADER_LENGTH */ 637656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=rr->length; 638656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n=ssl3_read_n(s,i,i,1); 639656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (n <= 0) return(n); /* error or non-blocking io */ 640656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 641656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this packet contained a partial record, dump it */ 642656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( n != i) 643656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 64498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 645656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length = 0; 646656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto again; 647656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 648656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 649656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now n == rr->length, 650656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and s->packet_length == DTLS1_RT_HEADER_LENGTH + rr->length */ 651656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 652656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_HEADER; /* set state for later operations */ 653656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 654656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* match epochs. NULL means the packet is dropped on the floor */ 655656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch); 656656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( bitmap == NULL) 657221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 658221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom rr->length = 0; 659221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom s->packet_length = 0; /* dump this record */ 660221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto again; /* get another record */ 661656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 662656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 663221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* Check whether this is a repeat, or aged record. 66498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * Don't check if we're listening and this message is 66598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * a ClientHello. They can look as if they're replayed, 66698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * since they arrive from different connections and 66798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * would be dropped unnecessarily. 66898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 66998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE && 67098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom *p == SSL3_MT_CLIENT_HELLO) && 671221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom !dtls1_record_replay_check(s, bitmap)) 672656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 673e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu rr->length = 0; 674656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->packet_length=0; /* dump this record */ 675656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto again; /* get another record */ 676656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 677656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 678656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* just read a 0 length packet */ 679656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length == 0) goto again; 680656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 681221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom /* If this record is from the next epoch (either HM or ALERT), 6823d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom * and a handshake is currently in progress, buffer it since it 6833d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom * cannot be processed at this time. */ 684221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (is_next_epoch) 685221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 6863d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom if (SSL_in_init(s) || s->in_handshake) 6873d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom { 6883d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom dtls1_buffer_record(s, &(s->d1->unprocessed_rcds), rr->seq_num); 6893d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom } 690221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom rr->length = 0; 691221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom s->packet_length = 0; 692221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto again; 693221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 694656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 6953d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom if (!dtls1_process_record(s)) 6963d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom { 6973d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom rr->length = 0; 6983d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom s->packet_length = 0; /* dump this record */ 6993d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom goto again; /* get another record */ 7003d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom } 701656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 702656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_clear_timeouts(s); /* done waiting */ 703656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 704656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 705656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 706656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 707656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Return up to 'len' payload bytes received in 'type' records. 708656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 'type' is one of the following: 709656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 710656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) 711656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) 712656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - 0 (during a shutdown, no data has to be returned) 713656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 714656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If we don't have stored data to work from, read a SSL/TLS record first 715656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (possibly multiple records if we still don't have anything to return). 716656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 717656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This function must handle any surprises the peer may have for us, such as 718656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Alert records (e.g. close_notify), ChangeCipherSpec records (not really 719656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * a surprise, but handled as if it were), or renegotiation requests. 720656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Also if record payloads contain fragments too small to process, we store 721656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * them until there is enough for the respective protocol (the record protocol 722656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * may use arbitrary fragmentation and even interleaving): 723656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Change cipher spec protocol 724656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * just 1 byte needed, no need for keeping anything stored 725656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Alert protocol 726656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2 bytes needed (AlertLevel, AlertDescription) 727656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Handshake protocol 728656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4 bytes needed (HandshakeType, uint24 length) -- we just have 729656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * to detect unexpected Client Hello and Hello Request messages 730656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * here, anything else is handled by higher layers 731656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Application data protocol 732656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * none of our business 733656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 734656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek) 735656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 736656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int al,i,j,ret; 737656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int n; 738656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_RECORD *rr; 739656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project void (*cb)(const SSL *ssl,int type2,int val)=NULL; 740656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 741656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.buf == NULL) /* Not initialized yet */ 742656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_setup_buffers(s)) 743656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 744656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 745656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XXX: check what the second '&& type' is about */ 746656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((type && (type != SSL3_RT_APPLICATION_DATA) && 747656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (type != SSL3_RT_HANDSHAKE) && type) || 748656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (peek && (type != SSL3_RT_APPLICATION_DATA))) 749656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 750656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR); 751656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return -1; 752656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 753656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 754656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* check whether there's a handshake message (client hello?) waiting */ 755656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( (ret = have_handshake_fragment(s, type, buf, len, peek))) 756656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 757656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 758656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Now s->d1->handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. */ 759656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 760656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!s->in_handshake && SSL_in_init(s)) 761656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 762656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* type == SSL3_RT_APPLICATION_DATA */ 763656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 764656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 765656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 766656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 767656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 768656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 769656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 770656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 771656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 772656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstart: 773656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 774656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 775656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->s3->rrec.type - is the type of record 776656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->s3->rrec.data, - data 777656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->s3->rrec.off, - offset into 'data' for next read 778656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->s3->rrec.length, - number of bytes. */ 779656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr = &(s->s3->rrec); 780656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 78198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* We are not handshaking and have no data yet, 78298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * so process data buffered during the last handshake 78398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * in advance, if any. 78498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 78598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (s->state == SSL_ST_OK && rr->length == 0) 78698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 78798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom pitem *item; 78898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom item = pqueue_pop(s->d1->buffered_app_data.q); 78998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (item) 79098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 79198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_copy_record(s, item); 79298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 79398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom OPENSSL_free(item->data); 79498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom pitem_free(item); 79598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 79698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 79798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 79898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Check for timeout */ 79998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (dtls1_handle_timeout(s) > 0) 80098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 80198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 802656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* get new packet if necessary */ 803656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY)) 804656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 805656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret=dtls1_get_record(s); 806656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ret <= 0) 807656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 808656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = dtls1_read_failed(s, ret); 809656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* anything other than a timeout is an error */ 810656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ret <= 0) 811656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(ret); 812656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 813656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 814656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 815656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 816656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 817656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now have a packet which can be read and processed */ 818656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 819656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, 820656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * reset by ssl3_get_finished */ 821656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project && (rr->type != SSL3_RT_HANDSHAKE)) 822656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 82398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* We now have application data between CCS and Finished. 82498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * Most likely the packets were reordered on their way, so 82598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * buffer the application data for later processing rather 82698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * than dropping the connection. 82798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 8283d3a1b8fcf46ca3bdb3d8f09acd6ef604624a30dBrian Carlstrom dtls1_buffer_record(s, &(s->d1->buffered_app_data), rr->seq_num); 82998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 83098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 831656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 832656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 833656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If the other end has shut down, throw anything we read away 834656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (even in 'peek' mode) */ 835656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->shutdown & SSL_RECEIVED_SHUTDOWN) 836656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 837656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length=0; 838656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 839656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 840656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 841656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 842656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 843656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (type == rr->type) /* SSL3_RT_APPLICATION_DATA or SSL3_RT_HANDSHAKE */ 844656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 845656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* make sure that we are not getting application data when we 846656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are doing a handshake for the first time */ 847656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && 848656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->enc_read_ctx == NULL)) 849656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 850656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 851656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE); 852656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 853656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 854656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 855656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len <= 0) return(len); 856656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 857656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((unsigned int)len > rr->length) 858656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = rr->length; 859656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 860656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = (unsigned int)len; 861656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 862656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(buf,&(rr->data[rr->off]),n); 863656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!peek) 864656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 865656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length-=n; 866656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->off+=n; 867656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->length == 0) 868656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 869656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_HEADER; 870656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->off=0; 871656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 872656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 873656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(n); 874656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 875656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 876656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 877656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we get here, then type != rr->type; if we have a handshake 878656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * message, then it was unexpected (Hello Request or Client Hello). */ 879656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 880656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In case of record types for which we have 'fragment' storage, 881656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * fill that so that we can process the data at a fixed place. 882656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 883656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 884656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int k, dest_maxlen = 0; 885656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *dest = NULL; 886656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int *dest_len = NULL; 887656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 888656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->type == SSL3_RT_HANDSHAKE) 889656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 890656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_maxlen = sizeof s->d1->handshake_fragment; 891656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest = s->d1->handshake_fragment; 892656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_len = &s->d1->handshake_fragment_len; 893656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 894656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (rr->type == SSL3_RT_ALERT) 895656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 896656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_maxlen = sizeof(s->d1->alert_fragment); 897656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest = s->d1->alert_fragment; 898656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest_len = &s->d1->alert_fragment_len; 899656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 90098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* else it's a CCS message, or application data or wrong */ 90198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom else if (rr->type != SSL3_RT_CHANGE_CIPHER_SPEC) 90298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 90398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Application data while renegotiating 90498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * is allowed. Try again reading. 90598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 90698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (rr->type == SSL3_RT_APPLICATION_DATA) 90798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 90898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom BIO *bio; 90998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->s3->in_read_app_data=2; 91098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom bio=SSL_get_rbio(s); 91198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->rwstate=SSL_READING; 91298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom BIO_clear_retry_flags(bio); 91398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom BIO_set_retry_read(bio); 91498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return(-1); 91598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 916656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 91798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* Not certain if this is the right error handling */ 91898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom al=SSL_AD_UNEXPECTED_MESSAGE; 91998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD); 92098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto f_err; 92198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 922656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 923656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (dest_maxlen > 0) 924656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 925656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XDTLS: In a pathalogical case, the Client Hello 926656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * may be fragmented--don't always expect dest_maxlen bytes */ 927656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->length < dest_maxlen) 928656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 929e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 930e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu /* 931e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * for normal alerts rr->length is 2, while 932e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * dest_maxlen is 7 if we were to handle this 933e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * non-existing alert... 934e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu */ 935e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu FIX ME 936e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 937656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rstate=SSL_ST_READ_HEADER; 938656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length = 0; 939656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 940656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 941656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 942656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now move 'n' bytes: */ 943656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for ( k = 0; k < dest_maxlen; k++) 944656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 945656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dest[k] = rr->data[rr->off++]; 946656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length--; 947656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 948656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *dest_len = dest_maxlen; 949656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 950656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 951656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 952656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* s->d1->handshake_fragment_len == 12 iff rr->type == SSL3_RT_HANDSHAKE; 953656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * s->d1->alert_fragment_len == 7 iff rr->type == SSL3_RT_ALERT. 954656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) */ 955656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 956656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we are a client, check for an incoming 'Hello Request': */ 957656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((!s->server) && 958656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) && 959656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && 960656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->session != NULL) && (s->session->cipher != NULL)) 961656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 962656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_fragment_len = 0; 963656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 964656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((s->d1->handshake_fragment[1] != 0) || 965656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment[2] != 0) || 966656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->d1->handshake_fragment[3] != 0)) 967656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 968656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_DECODE_ERROR; 969656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_HELLO_REQUEST); 970656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 971656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 972656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 973656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* no need to check sequence number on HELLO REQUEST messages */ 974656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 975656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 976656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 977656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_fragment, 4, s, s->msg_callback_arg); 978656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 979656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (SSL_is_init_finished(s) && 980656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && 981656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !s->s3->renegotiate) 982656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 983656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_renegotiate(s); 984656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (ssl3_renegotiate_check(s)) 985656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 986656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 987656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 988656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 989656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 990656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 991656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 992656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 993656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 994656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!(s->mode & SSL_MODE_AUTO_RETRY)) 995656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 996656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.left == 0) /* no read-ahead left? */ 997656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 998656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO *bio; 999656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In the case where we try to read application data, 1000656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * but we trigger an SSL handshake, we return -1 with 1001656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the retry option set. Otherwise renegotiation may 1002656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * cause nasty problems in the blocking world */ 1003656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_READING; 1004656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bio=SSL_get_rbio(s); 1005656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_clear_retry_flags(bio); 1006656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_set_retry_read(bio); 1007656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1008656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1009656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1010656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1011656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1012656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we either finished a handshake or ignored the request, 1013656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * now try again to obtain the (application) data we were asked for */ 1014656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1015656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1016656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1017656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->d1->alert_fragment_len >= DTLS1_AL_HEADER_LENGTH) 1018656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1019656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int alert_level = s->d1->alert_fragment[0]; 1020656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int alert_descr = s->d1->alert_fragment[1]; 1021656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1022656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->alert_fragment_len = 0; 1023656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1024656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1025656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(0, s->version, SSL3_RT_ALERT, 1026656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->alert_fragment, 2, s, s->msg_callback_arg); 1027656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1028656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->info_callback != NULL) 1029656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->info_callback; 1030656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (s->ctx->info_callback != NULL) 1031656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->ctx->info_callback; 1032656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1033656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (cb != NULL) 1034656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1035656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project j = (alert_level << 8) | alert_descr; 1036656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb(s, SSL_CB_READ_ALERT, j); 1037656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1038656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1039656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (alert_level == 1) /* warning */ 1040656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1041656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->warn_alert = alert_descr; 1042656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (alert_descr == SSL_AD_CLOSE_NOTIFY) 1043656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1044656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->shutdown |= SSL_RECEIVED_SHUTDOWN; 1045656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 1046656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1047656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1048656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XXX: this is a possible improvement in the future */ 1049656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now check if it's a missing record */ 1050656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (alert_descr == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) 1051656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1052656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short seq; 1053656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int frag_off; 1054656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *p = &(s->d1->alert_fragment[2]); 1055656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1056656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2s(p, seq); 1057656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2l3(p, frag_off); 1058656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 105998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_retransmit_message(s, 106098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_get_queue_priority(frag->msg_header.seq, 0), 106198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom frag_off, &found); 1062656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( ! found && SSL_in_init(s)) 1063656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1064656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* fprintf( stderr,"in init = %d\n", SSL_in_init(s)); */ 1065656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* requested a message not yet sent, 1066656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project send an alert ourselves */ 1067656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_send_alert(s,SSL3_AL_WARNING, 1068656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1069656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1070656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1071656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1072656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1073656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (alert_level == 2) /* fatal */ 1074656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1075656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project char tmp[16]; 1076656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1077656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 1078656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->fatal_alert = alert_descr; 1079656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); 1080656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_snprintf(tmp,sizeof tmp,"%d",alert_descr); 1081656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ERR_add_error_data(2,"SSL alert number ",tmp); 1082656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->shutdown|=SSL_RECEIVED_SHUTDOWN; 1083656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_CTX_remove_session(s->ctx,s->session); 1084656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 1085656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1086656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1087656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1088656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_ILLEGAL_PARAMETER; 1089656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE); 1090656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1091656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1092656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1093656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1094656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1095656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1096656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->shutdown & SSL_SENT_SHUTDOWN) /* but we have not received a shutdown */ 1097656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1098656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 1099656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length=0; 1100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(0); 1101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC) 1104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct ccs_header_st ccs_hdr; 110698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom unsigned int ccs_hdr_len = DTLS1_CCS_HEADER_LENGTH; 1107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_ccs_header(rr->data, &ccs_hdr); 1109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1110221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (s->version == DTLS1_BAD_VER) 1111221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom ccs_hdr_len = 3; 1112221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 1113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* 'Change Cipher Spec' is just a single byte, so we know 1114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * exactly what the record payload has to look like */ 1115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XDTLS: check that epoch is consistent */ 1116221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if ( (rr->length != ccs_hdr_len) || 1117221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS)) 1118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=SSL_AD_ILLEGAL_PARAMETER; 1120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC); 1121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length=0; 1125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC, 1128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->data, 1, s, s->msg_callback_arg); 1129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 113098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* We can't process a CCS now, because previous handshake 113198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * messages are still missing, so just drop it. 113298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 113398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (!s->d1->change_cipher_spec_ok) 113498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 113598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 113698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 113798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 113898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom s->d1->change_cipher_spec_ok = 0; 113998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 1140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->change_cipher_spec=1; 1141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_do_change_cipher_spec(s)) 1142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* do this whenever CCS is processed */ 1145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_reset_seq_numbers(s, SSL3_CC_READ); 1146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1147221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (s->version == DTLS1_BAD_VER) 1148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_read_seq++; 1149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Unexpected handshake message (Client Hello, or protocol violation) */ 1154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((s->d1->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) && 1155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !s->in_handshake) 1156656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1157656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct hm_header_st msg_hdr; 1158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this may just be a stale retransmit */ 1160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_message_header(rr->data, &msg_hdr); 1161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if( rr->epoch != s->d1->r_epoch) 1162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length = 0; 1164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 116798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* If we are server, we may have a repeated FINISHED of the 116898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * client here, then retransmit our CCS and FINISHED. 116998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 117098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (msg_hdr.type == SSL3_MT_FINISHED) 117198d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom { 117298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom dtls1_retransmit_buffered_messages(s); 117398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom rr->length = 0; 117498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom goto start; 117598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom } 117698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom 1177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (((s->state&SSL_ST_MASK) == SSL_ST_OK) && 1178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) 1179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1180656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 /* worked only because C operator preferences are not as expected (and 1181656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * because this is not really needed for clients except for detecting 1182656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * protocol violations): */ 1183656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->state=SSL_ST_BEFORE|(s->server) 1184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ?SSL_ST_ACCEPT 1185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project :SSL_ST_CONNECT; 1186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#else 1187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT; 1188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->new_session=1; 1190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 1192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 1193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 1194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 1196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1199656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!(s->mode & SSL_MODE_AUTO_RETRY)) 1200656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1201656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->rbuf.left == 0) /* no read-ahead left? */ 1202656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1203656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO *bio; 1204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In the case where we try to read application data, 1205656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * but we trigger an SSL handshake, we return -1 with 1206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the retry option set. Otherwise renegotiation may 1207656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * cause nasty problems in the blocking world */ 1208656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_READING; 1209656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bio=SSL_get_rbio(s); 1210656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_clear_retry_flags(bio); 1211656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BIO_set_retry_read(bio); 1212656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1213656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1214656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1215656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1216656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1217656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1218656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project switch (rr->type) 1219656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1220656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project default: 1221656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifndef OPENSSL_NO_TLS 1222656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* TLS just ignores unknown message types */ 1223656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->version == TLS1_VERSION) 1224656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1225656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->length = 0; 1226656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto start; 1227656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1228656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1229656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 1230656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD); 1231656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1232656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_CHANGE_CIPHER_SPEC: 1233656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_ALERT: 1234656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_HANDSHAKE: 1235656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we already handled all of these, with the possible exception 1236656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * of SSL3_RT_HANDSHAKE when s->in_handshake is set, but that 1237656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * should not happen when type != rr->type */ 1238656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 1239656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,ERR_R_INTERNAL_ERROR); 1240656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1241656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project case SSL3_RT_APPLICATION_DATA: 1242656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* At this point, we were expecting handshake data, 1243656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * but have application data. If the library was 1244656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * running inside ssl3_read() (i.e. in_read_app_data 1245656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * is set) and it makes sense to read application data 1246656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * at this point (session renegotiation not yet started), 1247656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * we will indulge it. 1248656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 1249656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->in_read_app_data && 1250656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->s3->total_renegotiations != 0) && 1251656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (( 1252656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state & SSL_ST_CONNECT) && 1253656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state >= SSL3_ST_CW_CLNT_HELLO_A) && 1254656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state <= SSL3_ST_CR_SRVR_HELLO_A) 1255656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ) || ( 1256656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state & SSL_ST_ACCEPT) && 1257656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state <= SSL3_ST_SW_HELLO_REQ_A) && 1258656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->state >= SSL3_ST_SR_CLNT_HELLO_A) 1259656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ) 1260656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project )) 1261656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1262656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->in_read_app_data=2; 1263656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1264656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1265656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1266656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1267656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project al=SSL_AD_UNEXPECTED_MESSAGE; 1268656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD); 1269656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto f_err; 1270656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1271656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1272656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* not reached */ 1273656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1274656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectf_err: 1275656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_send_alert(s,SSL3_AL_FATAL,al); 1276656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 1277656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 1278656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1279656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1280656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint 1281656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, int len) 1282656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1283656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i; 1284656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1285656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (SSL_in_init(s) && !s->in_handshake) 1286656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1287656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->handshake_func(s); 1288656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i < 0) return(i); 1289656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == 0) 1290656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1291656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE); 1292656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return -1; 1293656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1294656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1295656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 129698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (len > SSL3_RT_MAX_PLAIN_LENGTH) 1297656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 129898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,SSL_R_DTLS_MESSAGE_TOO_BIG); 129998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return -1; 1300656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1301656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 130298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom i = dtls1_write_bytes(s, type, buf_, len); 130398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom return i; 1304656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1305656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1306656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1307656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this only happens when a client hello is received and a handshake 1308656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * is started. */ 1309656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 1310656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecthave_handshake_fragment(SSL *s, int type, unsigned char *buf, 1311656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int len, int peek) 1312656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1313656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1314656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((type == SSL3_RT_HANDSHAKE) && (s->d1->handshake_fragment_len > 0)) 1315656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* (partially) satisfy request from storage */ 1316656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1317656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *src = s->d1->handshake_fragment; 1318656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *dst = buf; 1319656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int k,n; 1320656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1321656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* peek == 0 */ 1322656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = 0; 1323656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while ((len > 0) && (s->d1->handshake_fragment_len > 0)) 1324656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1325656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *dst++ = *src++; 1326656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project len--; s->d1->handshake_fragment_len--; 1327656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n++; 1328656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1329656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* move any remaining fragment bytes: */ 1330656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (k = 0; k < s->d1->handshake_fragment_len; k++) 1331656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->handshake_fragment[k] = *src++; 1332656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return n; 1333656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1334656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1335656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1336656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1337656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1338656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1339656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1340656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1341656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Call this to write data in records of type 'type' 1342656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * It will return <= 0 if not all data has been sent or non-blocking IO. 1343656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 134498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstromint dtls1_write_bytes(SSL *s, int type, const void *buf, int len) 1345656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1346656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i; 1347656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 134898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom OPENSSL_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH); 1349656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->rwstate=SSL_NOTHING; 135098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom i=do_dtls1_write(s, type, buf, len, 0); 1351e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu return i; 1352656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1353656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1354656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint do_dtls1_write(SSL *s, int type, const unsigned char *buf, unsigned int len, int create_empty_fragment) 1355656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1356656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *p,*pseq; 1357656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,mac_size,clear=0; 1358656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int prefix_len = 0; 1359656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_RECORD *wr; 1360656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL3_BUFFER *wb; 1361656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSL_SESSION *sess; 1362656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int bs; 136399ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom unsigned int len_with_overhead = len + SSL3_RT_DEFAULT_WRITE_OVERHEAD; 1364656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1365656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* first check if there is a SSL3_BUFFER still being written 1366656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * out. This will happen with non blocking IO */ 1367656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->wbuf.left != 0) 1368656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1369656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_assert(0); /* XDTLS: want to see if we ever get here */ 1370656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(ssl3_write_pending(s,type,buf,len)); 1371656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1372656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 137399ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom if (s->s3->wbuf.len < len_with_overhead) 137499ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom { 137599ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom if ((p=OPENSSL_realloc(s->s3->wbuf.buf, len_with_overhead)) == NULL) { 137699ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom SSLerr(SSL_F_DO_DTLS1_WRITE,ERR_R_MALLOC_FAILURE); 137799ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom goto err; 137899ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom } 137999ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom s->s3->wbuf.buf = p; 138099ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom s->s3->wbuf.len = len_with_overhead; 138199ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom } 138299ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom 1383656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we have an alert to send, lets send it */ 1384656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->alert_dispatch) 1385656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1386656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=s->method->ssl_dispatch_alert(s); 1387656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) 1388656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(i); 1389656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* if it went, fall through and send more stuff */ 1390656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1391656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1392656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len == 0 && !create_empty_fragment) 1393656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1394656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1395656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr= &(s->s3->wrec); 1396656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wb= &(s->s3->wbuf); 1397656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project sess=s->session; 1398656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1399656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( (sess == NULL) || 1400656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (s->enc_write_ctx == NULL) || 1401221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom (EVP_MD_CTX_md(s->write_hash) == NULL)) 1402656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project clear=1; 1403656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1404656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (clear) 1405656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project mac_size=0; 1406656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1407221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 1408221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom mac_size=EVP_MD_CTX_size(s->write_hash); 1409221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (mac_size < 0) 1410221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto err; 1411221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 1412656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1413656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* DTLS implements explicit IV, so no need for empty fragments */ 1414656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1415656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* 'create_empty_fragment' is true only when this function calls itself */ 1416656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done 141798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom && SSL_version(s) != DTLS1_VERSION && SSL_version(s) != DTLS1_BAD_VER) 1418656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1419656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* countermeasure against known-IV weakness in CBC ciphersuites 1420656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (see http://www.openssl.org/~bodo/tls-cbc.txt) 1421656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 1422656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1423656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) 1424656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1425656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* recursive function call with 'create_empty_fragment' set; 1426656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * this prepares and buffers the data for an empty fragment 1427656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (these 'prefix_len' bytes are sent out later 1428656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * together with the actual payload) */ 1429656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project prefix_len = s->method->do_ssl_write(s, type, buf, 0, 1); 1430656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (prefix_len <= 0) 1431656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1432656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 143399ed67e397c4f2d3e0e65fa714a416bb73a0d108Brian Carlstrom if (s->s3->wbuf.len < (size_t)prefix_len + SSL3_RT_MAX_PACKET_SIZE) 1434656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1435656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* insufficient space */ 1436656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DO_DTLS1_WRITE, ERR_R_INTERNAL_ERROR); 1437656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1438656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1439656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1440656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1441656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->empty_fragment_done = 1; 1442656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1443656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1444656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p = wb->buf + prefix_len; 1445656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1446656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* write the header */ 1447656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1448656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *(p++)=type&0xff; 1449656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->type=type; 1450656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1451221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom *(p++)=(s->version>>8); 1452221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom *(p++)=s->version&0xff; 1453656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1454656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* field where we are to write out packet epoch, seq num and len */ 1455656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pseq=p; 1456656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p+=10; 1457656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1458656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* lets setup the record stuff. */ 1459656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1460656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Make space for the explicit IV in case of CBC. 1461656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (this is a bit of a boundary violation, but what the heck). 1462656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 1463656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( s->enc_write_ctx && 1464656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (EVP_CIPHER_mode( s->enc_write_ctx->cipher ) & EVP_CIPH_CBC_MODE)) 1465656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bs = EVP_CIPHER_block_size(s->enc_write_ctx->cipher); 1466656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1467656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bs = 0; 1468656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1469656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->data=p + bs; /* make room for IV in case of CBC */ 1470656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length=(int)len; 1471656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->input=(unsigned char *)buf; 1472656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1473656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now 'read' from wr->input, wr->length bytes into 1474656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->data */ 1475656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1476656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* first we compress */ 1477656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->compress != NULL) 1478656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1479656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (!ssl3_do_compress(s)) 1480656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1481656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project SSLerr(SSL_F_DO_DTLS1_WRITE,SSL_R_COMPRESSION_FAILURE); 1482656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project goto err; 1483656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1484656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1485656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1486656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1487656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(wr->data,wr->input,wr->length); 1488656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->input=wr->data; 1489656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1490656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1491656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we should still have the output to wr->data and the input 1492656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * from wr->input. Length should be wr->length. 1493656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->data still points in the wb->buf */ 1494656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1495656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (mac_size != 0) 1496656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1497221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if(s->method->ssl3_enc->mac(s,&(p[wr->length + bs]),1) < 0) 1498221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom goto err; 1499656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length+=mac_size; 1500656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1501656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1502656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this is true regardless of mac size */ 1503656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->input=p; 1504656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->data=p; 1505656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1506656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1507656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* ssl3_enc can only have an error on read */ 1508656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (bs) /* bs != 0 in case of CBC */ 1509656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1510656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project RAND_pseudo_bytes(p,bs); 1511656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* master IV and last CBC residue stand for 1512656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the rest of randomness */ 1513656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length += bs; 1514656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1515656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1516656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->method->ssl3_enc->enc(s,1); 1517656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1518656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* record length after mac and block padding */ 1519656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* if (type == SSL3_RT_APPLICATION_DATA || 1520656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (type == SSL3_RT_ALERT && ! SSL_in_init(s))) */ 1521656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1522656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* there's only one epoch between handshake and app data */ 1523656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1524656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->w_epoch, pseq); 1525656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1526656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* XDTLS: ?? */ 1527656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* else 1528656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->handshake_epoch, pseq); */ 1529656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1530656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(pseq, &(s->s3->write_sequence[2]), 6); 1531656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project pseq+=6; 1532656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(wr->length,pseq); 1533656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1534656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we should now have 1535656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->data pointing to the encrypted data, which is 1536656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * wr->length long */ 1537656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->type=type; /* not needed but helps for debugging */ 1538656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wr->length+=DTLS1_RT_HEADER_LENGTH; 1539656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1540656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 /* this is now done at the message layer */ 1541656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* buffer the record, making it easy to handle retransmits */ 1542656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( type == SSL3_RT_HANDSHAKE || type == SSL3_RT_CHANGE_CIPHER_SPEC) 1543656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_buffer_record(s, wr->data, wr->length, 1544656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *((PQ_64BIT *)&(s->s3->write_sequence[0]))); 1545656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1546656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1547656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ssl3_record_sequence_update(&(s->s3->write_sequence[0])); 1548656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1549656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (create_empty_fragment) 1550656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1551656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we are in a recursive call; 1552656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * just return the length, don't write out anything here 1553656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 1554656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return wr->length; 1555656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1556656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1557656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* now let's set up wb */ 1558656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wb->left = prefix_len + wr->length; 1559656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project wb->offset = 0; 1560656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1561656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* memorize arguments so that ssl3_write_pending can detect bad write retries later */ 1562656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_tot=len; 1563656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_buf=buf; 1564656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_type=type; 1565656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->wpend_ret=len; 1566656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1567656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now just need to write the buffer */ 1568656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ssl3_write_pending(s,type,buf,len); 1569656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 1570656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return -1; 1571656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1572656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1573656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1574656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1575221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromstatic int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap) 1576656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1577221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int cmp; 1578221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom unsigned int shift; 1579221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom const unsigned char *seq = s->s3->read_sequence; 1580656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1581221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom cmp = satsub64be(seq,bitmap->max_seq_num); 1582221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (cmp > 0) 1583656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1584221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy (s->s3->rrec.seq_num,seq,8); 1585221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return 1; /* this record in new */ 1586656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1587221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom shift = -cmp; 1588221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (shift >= sizeof(bitmap->map)*8) 1589221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return 0; /* stale, outside the window */ 1590221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else if (bitmap->map & (1UL<<shift)) 1591656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; /* record previously received */ 1592221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 1593221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy (s->s3->rrec.seq_num,seq,8); 1594656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 1595656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1596656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1597656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1598656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap) 1599656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1600221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int cmp; 1601656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int shift; 1602221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom const unsigned char *seq = s->s3->read_sequence; 1603656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1604221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom cmp = satsub64be(seq,bitmap->max_seq_num); 1605221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (cmp > 0) 1606656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1607221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom shift = cmp; 1608221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (shift < sizeof(bitmap->map)*8) 1609221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom bitmap->map <<= shift, bitmap->map |= 1UL; 1610221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else 1611221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom bitmap->map = 1UL; 1612221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy(bitmap->max_seq_num,seq,8); 1613656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1614221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom else { 1615221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom shift = -cmp; 1616221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (shift < sizeof(bitmap->map)*8) 1617221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom bitmap->map |= 1UL<<shift; 1618656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1619656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1620656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1621656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1622656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint dtls1_dispatch_alert(SSL *s) 1623656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1624656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,j; 1625656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project void (*cb)(const SSL *ssl,int type,int val)=NULL; 1626e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu unsigned char buf[DTLS1_AL_HEADER_LENGTH]; 1627656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *ptr = &buf[0]; 1628656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1629656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->alert_dispatch=0; 1630656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1631656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(buf, 0x00, sizeof(buf)); 1632656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *ptr++ = s->s3->send_alert[0]; 1633656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *ptr++ = s->s3->send_alert[1]; 1634656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1635e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1636656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) 1637656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1638656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->handshake_read_seq, ptr); 1639656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1640656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( s->d1->r_msg_hdr.frag_off == 0) /* waiting for a new msg */ 1641656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1642656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1643656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s2n(s->d1->r_msg_hdr.seq, ptr); /* partial msg read */ 1644656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1645656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1646656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1647656d9c7f52f88b3a3daccafa7655dec086c4756eThe 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); 1648656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1649656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project l2n3(s->d1->r_msg_hdr.frag_off, ptr); 1650656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1651e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 1652656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1653656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0); 1654656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) 1655656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1656656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->s3->alert_dispatch=1; 1657656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* fprintf( stderr, "not done with alert\n" ); */ 1658656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1659656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1660656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1661e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu if (s->s3->send_alert[0] == SSL3_AL_FATAL 1662e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1663e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 1664e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 1665221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom ) 1666656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (void)BIO_flush(s->wbio); 1667656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1668656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->msg_callback) 1669656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 1670656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 2, s, s->msg_callback_arg); 1671656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1672656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s->info_callback != NULL) 1673656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->info_callback; 1674656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (s->ctx->info_callback != NULL) 1675656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb=s->ctx->info_callback; 1676656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1677656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (cb != NULL) 1678656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1679656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1]; 1680656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cb(s,SSL_CB_WRITE_ALERT,j); 1681656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1682656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1683656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(i); 1684656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1685656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1686656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1687656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic DTLS1_BITMAP * 1688656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch) 1689656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1690656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1691656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *is_next_epoch = 0; 1692656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1693656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* In current epoch, accept HM, CCS, DATA, & ALERT */ 1694656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->epoch == s->d1->r_epoch) 1695656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return &s->d1->bitmap; 1696656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1697656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Only HM and ALERT messages can be from the next epoch */ 1698656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if (rr->epoch == (unsigned long)(s->d1->r_epoch + 1) && 1699656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (rr->type == SSL3_RT_HANDSHAKE || 1700656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type == SSL3_RT_ALERT)) 1701656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1702656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *is_next_epoch = 1; 1703656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return &s->d1->next_bitmap; 1704656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1705656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1706656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 1707656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1708656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1709656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#if 0 1710656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int 1711656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_record_needs_buffering(SSL *s, SSL3_RECORD *rr, unsigned short *priority, 1712656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned long *offset) 1713656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1714656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1715656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* alerts are passed up immediately */ 1716656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->type == SSL3_RT_APPLICATION_DATA || 1717656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type == SSL3_RT_ALERT) 1718656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1719656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1720656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Only need to buffer if a handshake is underway. 1721656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (this implies that Hello Request and Client Hello are passed up 1722656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * immediately) */ 1723656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( SSL_in_init(s)) 1724656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1725656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *data = rr->data; 1726656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* need to extract the HM/CCS sequence number here */ 1727656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->type == SSL3_RT_HANDSHAKE || 1728656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rr->type == SSL3_RT_CHANGE_CIPHER_SPEC) 1729656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1730656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned short seq_num; 1731656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct hm_header_st msg_hdr; 1732656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct ccs_header_st ccs_hdr; 1733656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1734656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rr->type == SSL3_RT_HANDSHAKE) 1735656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1736656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_message_header(data, &msg_hdr); 1737656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq_num = msg_hdr.seq; 1738656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *offset = msg_hdr.frag_off; 1739656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1740656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1741656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1742656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project dtls1_get_ccs_header(data, &ccs_hdr); 1743656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq_num = ccs_hdr.seq; 1744656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *offset = 0; 1745656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1746656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1747656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this is either a record we're waiting for, or a 1748656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * retransmit of something we happened to previously 1749656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * receive (higher layers will drop the repeat silently */ 1750656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( seq_num < s->d1->handshake_read_seq) 1751656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1752656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (rr->type == SSL3_RT_HANDSHAKE && 1753656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq_num == s->d1->handshake_read_seq && 1754656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project msg_hdr.frag_off < s->d1->r_msg_hdr.frag_off) 1755656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1756656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else if ( seq_num == s->d1->handshake_read_seq && 1757656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC || 1758656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project msg_hdr.frag_off == s->d1->r_msg_hdr.frag_off)) 1759656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1760656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1761656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1762656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *priority = seq_num; 1763656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 1764656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1765656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1766656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else /* unknown record type */ 1767656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1768656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1769656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1770656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 1771656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1772656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 1773656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1774656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectvoid 1775656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_reset_seq_numbers(SSL *s, int rw) 1776656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1777656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *seq; 1778656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned int seq_bytes = sizeof(s->s3->read_sequence); 1779656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1780656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ( rw & SSL3_CC_READ) 1781656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1782656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq = s->s3->read_sequence; 1783656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->r_epoch++; 1784221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom memcpy(&(s->d1->bitmap), &(s->d1->next_bitmap), sizeof(DTLS1_BITMAP)); 1785656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->d1->next_bitmap), 0x00, sizeof(DTLS1_BITMAP)); 1786656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1787656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 1788656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1789656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project seq = s->s3->write_sequence; 179098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom memcpy(s->d1->last_write_sequence, seq, sizeof(s->s3->write_sequence)); 1791656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s->d1->w_epoch++; 1792656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1793656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1794656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(seq, 0x00, seq_bytes); 1795656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1796656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1797656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 1798656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void 1799656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectdtls1_clear_timeouts(SSL *s) 1800656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 1801656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memset(&(s->d1->timeout), 0x00, sizeof(struct dtls1_timeout_st)); 1802656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 1803