195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* 295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * DTLS implementation written by Nagendra Modadugu 395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. 495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* ==================================================================== 695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. 795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Redistribution and use in source and binary forms, with or without 995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * modification, are permitted provided that the following conditions 1095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * are met: 1195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1. Redistributions of source code must retain the above copyright 1395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * notice, this list of conditions and the following disclaimer. 1495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2. Redistributions in binary form must reproduce the above copyright 1695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * notice, this list of conditions and the following disclaimer in 1795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * the documentation and/or other materials provided with the 1895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * distribution. 1995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3. All advertising materials mentioning features or use of this 2195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * software must display the following acknowledgment: 2295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * "This product includes software developed by the OpenSSL Project 2395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 2495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 2695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * endorse or promote products derived from this software without 2795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * prior written permission. For written permission, please contact 2895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * openssl-core@openssl.org. 2995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 5. Products derived from this software may not be called "OpenSSL" 3195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * nor may "OpenSSL" appear in their names without prior written 3295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * permission of the OpenSSL Project. 3395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 6. Redistributions of any form whatsoever must retain the following 3595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * acknowledgment: 3695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * "This product includes software developed by the OpenSSL Project 3795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 3895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 4995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * OF THE POSSIBILITY OF SUCH DAMAGE. 5195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ==================================================================== 5295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 5395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * This product includes cryptographic software written by Eric Young 5495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (eay@cryptsoft.com). This product includes software written by Tim 5595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Hudson (tjh@cryptsoft.com). 5695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 5795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 5895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 5995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * All rights reserved. 6095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 6195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * This package is an SSL implementation written 6295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * by Eric Young (eay@cryptsoft.com). 6395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * The implementation was written so as to conform with Netscapes SSL. 6495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 6595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * This library is free for commercial and non-commercial use as long as 6695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * the following conditions are aheared to. The following conditions 6795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * apply to all code found in this distribution, be it the RC4, RSA, 6895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * lhash, DES, etc., code; not just the SSL code. The SSL documentation 6995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * included with this distribution is covered by the same copyright terms 7095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * except that the holder is Tim Hudson (tjh@cryptsoft.com). 7195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 7295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Copyright remains Eric Young's, and as such any Copyright notices in 7395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * the code are not to be removed. 7495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * If this package is used in a product, Eric Young should be given attribution 7595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * as the author of the parts of the library used. 7695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * This can be in the form of a textual message at program startup or 7795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * in documentation (online or textual) provided with the package. 7895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 7995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Redistribution and use in source and binary forms, with or without 8095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * modification, are permitted provided that the following conditions 8195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * are met: 8295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1. Redistributions of source code must retain the copyright 8395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * notice, this list of conditions and the following disclaimer. 8495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2. Redistributions in binary form must reproduce the above copyright 8595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * notice, this list of conditions and the following disclaimer in the 8695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * documentation and/or other materials provided with the distribution. 8795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3. All advertising materials mentioning features or use of this software 8895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * must display the following acknowledgement: 8995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * "This product includes cryptographic software written by 9095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Eric Young (eay@cryptsoft.com)" 9195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * The word 'cryptographic' can be left out if the rouines from the library 9295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * being used are not cryptographic related :-). 9395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 4. If you include any Windows specific code (or a derivative thereof) from 9495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * the apps directory (application code) you must include an acknowledgement: 9595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 9695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 9795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 9895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 9995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 10095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 10195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 10295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 10395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 10495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 10595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 10695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 10795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * SUCH DAMAGE. 10895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 10995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * The licence and distribution terms for any publically available version or 11095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * derivative of this code cannot be changed. i.e. this code cannot simply be 11195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * copied and put under another distribution licence 11295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * [including the GNU Public Licence.] */ 11395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 11495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <assert.h> 11595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <limits.h> 11695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <stdio.h> 11795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <string.h> 11895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 11995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/buf.h> 12095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/err.h> 12195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/evp.h> 12295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/mem.h> 12395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/obj.h> 12495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/rand.h> 12595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/x509.h> 12695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 12795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include "ssl_locl.h" 12895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 12995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#define RSMBLY_BITMASK_SIZE(msg_len) (((msg_len) + 7) / 8) 13095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 13195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#define RSMBLY_BITMASK_MARK(bitmask, start, end) { \ 13295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((end) - (start) <= 8) { \ 13395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley long ii; \ 13495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for (ii = (start); ii < (end); ii++) bitmask[((ii) >> 3)] |= (1 << ((ii) & 7)); \ 13595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { \ 13695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley long ii; \ 13795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley bitmask[((start) >> 3)] |= bitmask_start_values[((start) & 7)]; \ 13895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for (ii = (((start) >> 3) + 1); ii < ((((end) - 1)) >> 3); ii++) bitmask[ii] = 0xff; \ 13995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley bitmask[(((end) - 1) >> 3)] |= bitmask_end_values[((end) & 7)]; \ 14095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } } 14195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 14295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#define RSMBLY_BITMASK_IS_COMPLETE(bitmask, msg_len, is_complete) { \ 14395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley long ii; \ 14495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert((msg_len) > 0); \ 14595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley is_complete = 1; \ 14695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (bitmask[(((msg_len) - 1) >> 3)] != bitmask_end_values[((msg_len) & 7)]) is_complete = 0; \ 14795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (is_complete) for (ii = (((msg_len) - 1) >> 3) - 1; ii >= 0 ; ii--) \ 14895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (bitmask[ii] != 0xff) { is_complete = 0; break; } } 14995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 15095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#if 0 15195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#define RSMBLY_BITMASK_PRINT(bitmask, msg_len) { \ 15295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley long ii; \ 15395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley printf("bitmask: "); for (ii = 0; ii < (msg_len); ii++) \ 15495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley printf("%d ", (bitmask[ii >> 3] & (1 << (ii & 7))) >> (ii & 7)); \ 15595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley printf("\n"); } 15695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#endif 15795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 158cff6472442de2e65f95fa04893b12b1412118f60David Benjaminstatic const uint8_t bitmask_start_values[] = {0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0xc0, 0x80}; 159cff6472442de2e65f95fa04893b12b1412118f60David Benjaminstatic const uint8_t bitmask_end_values[] = {0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f}; 16095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 16195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* XDTLS: figure out the right values */ 162cff6472442de2e65f95fa04893b12b1412118f60David Benjaminstatic const unsigned int g_probable_mtu[] = {1500 - 28, 512 - 28, 256 - 28}; 16395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 16495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic unsigned int dtls1_guess_mtu(unsigned int curr_mtu); 16595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic void dtls1_fix_message_header(SSL *s, unsigned long frag_off, 16695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long frag_len); 16795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic unsigned char *dtls1_write_message_header(SSL *s, 16895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *p); 16995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic void dtls1_set_message_header_int(SSL *s, unsigned char mt, 17095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long len, unsigned short seq_num, unsigned long frag_off, 17195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long frag_len); 17295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic long dtls1_get_message_fragment(SSL *s, int stn, 17395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley long max, int *ok); 17495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 17595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic hm_fragment * 17695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_hm_fragment_new(unsigned long frag_len, int reassembly) 17795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 17895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag = NULL; 17995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *buf = NULL; 18095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *bitmask = NULL; 18195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 18295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = (hm_fragment *)OPENSSL_malloc(sizeof(hm_fragment)); 18395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( frag == NULL) 18495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return NULL; 18595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 18695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag_len) 18795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 18895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley buf = (unsigned char *)OPENSSL_malloc(frag_len); 18995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( buf == NULL) 19095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 19195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_free(frag); 19295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return NULL; 19395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 19495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 19595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 19695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* zero length fragment gets zero frag->fragment */ 19795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->fragment = buf; 19895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 19995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Initialize reassembly bitmask if necessary */ 20095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (reassembly) 20195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 20295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley bitmask = (unsigned char *)OPENSSL_malloc(RSMBLY_BITMASK_SIZE(frag_len)); 20395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (bitmask == NULL) 20495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 20595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (buf != NULL) OPENSSL_free(buf); 20695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_free(frag); 20795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return NULL; 20895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 20995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(bitmask, 0, RSMBLY_BITMASK_SIZE(frag_len)); 21095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 21195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 21295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->reassembly = bitmask; 21395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 21495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return frag; 21595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 21695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 21795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic void 21895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_hm_fragment_free(hm_fragment *frag) 21995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 22095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 22195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->msg_header.is_ccs) 22295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 22395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EVP_CIPHER_CTX_free(frag->msg_header.saved_retransmit_state.enc_write_ctx); 22495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EVP_MD_CTX_destroy(frag->msg_header.saved_retransmit_state.write_hash); 22595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 22695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->fragment) OPENSSL_free(frag->fragment); 22795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->reassembly) OPENSSL_free(frag->reassembly); 22895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_free(frag); 22995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 23095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 23195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */ 23295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint dtls1_do_write(SSL *s, int type) 23395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 23495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int ret; 23595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int curr_mtu; 23695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned int len, frag_off, mac_size, blocksize; 23795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 23895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* AHA! Figure out the MTU, and stick to the right size */ 23995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->d1->mtu < dtls1_min_mtu() && !(SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)) 24095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 24195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->mtu = 24295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL); 24395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 24495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* I've seen the kernel return bogus numbers when it doesn't know 24595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (initial write), so just make sure we have a reasonable number */ 24695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->d1->mtu < dtls1_min_mtu()) 24795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 24895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->mtu = 0; 24995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->mtu = dtls1_guess_mtu(s->d1->mtu); 25095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SET_MTU, 25195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->mtu, NULL); 25295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 25395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 25495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#if 0 25595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mtu = s->d1->mtu; 25695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 25795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf(stderr, "using MTU = %d\n", mtu); 25895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 25995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mtu -= (DTLS1_HM_HEADER_LENGTH + DTLS1_RT_HEADER_LENGTH); 26095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 26195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley curr_mtu = mtu - BIO_wpending(SSL_get_wbio(s)); 26295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 26395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( curr_mtu > 0) 26495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mtu = curr_mtu; 26595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else if ( ( ret = BIO_flush(SSL_get_wbio(s))) <= 0) 26695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return ret; 26795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 26895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( BIO_wpending(SSL_get_wbio(s)) + s->init_num >= mtu) 26995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 27095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret = BIO_flush(SSL_get_wbio(s)); 27195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( ret <= 0) 27295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return ret; 27395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mtu = s->d1->mtu - (DTLS1_HM_HEADER_LENGTH + DTLS1_RT_HEADER_LENGTH); 27495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 27595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#endif 27695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 27795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->d1->mtu >= dtls1_min_mtu()); /* should have something reasonable now */ 27895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 27995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( s->init_off == 0 && type == SSL3_RT_HANDSHAKE) 28095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->init_num == 28195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (int)s->d1->w_msg_hdr.msg_len + DTLS1_HM_HEADER_LENGTH); 28295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 28395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->write_hash) 28495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 28595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->enc_write_ctx && EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_GCM_MODE) 28695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mac_size = 0; 28795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 28895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mac_size = EVP_MD_CTX_size(s->write_hash); 28995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 29095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 29195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mac_size = 0; 29295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 29395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->enc_write_ctx && 29495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_CBC_MODE)) 29595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley blocksize = 2 * EVP_CIPHER_block_size(s->enc_write_ctx->cipher); 29695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 29795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley blocksize = 0; 29895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 29995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_off = 0; 30095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley while( s->init_num) 30195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 30295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley curr_mtu = s->d1->mtu - BIO_wpending(SSL_get_wbio(s)) - 30395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley DTLS1_RT_HEADER_LENGTH - mac_size - blocksize; 30495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 30595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( curr_mtu <= DTLS1_HM_HEADER_LENGTH) 30695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 30795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* grr.. we could get an error if MTU picked was wrong */ 30895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret = BIO_flush(SSL_get_wbio(s)); 30995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( ret <= 0) 31095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return ret; 31195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley curr_mtu = s->d1->mtu - DTLS1_RT_HEADER_LENGTH - 31295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mac_size - blocksize; 31395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 31495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 31595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( s->init_num > curr_mtu) 31695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len = curr_mtu; 31795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 31895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len = s->init_num; 31995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 32095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 32195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* XDTLS: this function is too long. split out the CCS part */ 32295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( type == SSL3_RT_HANDSHAKE) 32395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 32495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( s->init_off != 0) 32595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 32695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->init_off > DTLS1_HM_HEADER_LENGTH); 32795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_off -= DTLS1_HM_HEADER_LENGTH; 32895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num += DTLS1_HM_HEADER_LENGTH; 32995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 33095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( s->init_num > curr_mtu) 33195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len = curr_mtu; 33295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 33395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len = s->init_num; 33495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 33595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 33695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_fix_message_header(s, frag_off, 33795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len - DTLS1_HM_HEADER_LENGTH); 33895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 33995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_write_message_header(s, (unsigned char *)&s->init_buf->data[s->init_off]); 34095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 34195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(len >= DTLS1_HM_HEADER_LENGTH); 34295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 34395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 34495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret=dtls1_write_bytes(s,type,&s->init_buf->data[s->init_off], 34595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len); 34695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (ret < 0) 34795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 34895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* might need to update MTU here, but we don't know 34995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * which previous packet caused the failure -- so can't 35095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * really retransmit anything. continue as if everything 35195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * is fine and wait for an alert to handle the 35295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * retransmit 35395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 35495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( BIO_ctrl(SSL_get_wbio(s), 35595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BIO_CTRL_DGRAM_MTU_EXCEEDED, 0, NULL) > 0 ) 35695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->mtu = BIO_ctrl(SSL_get_wbio(s), 35795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL); 35895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 35995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return(-1); 36095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 36195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 36295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 36395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 36495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* bad if this assert fails, only part of the handshake 36595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * message got sent. but why would this happen? */ 36695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(len == (unsigned int)ret); 36795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 36895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (type == SSL3_RT_HANDSHAKE && ! s->d1->retransmitting) 36995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 37095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* should not be done for 'Hello Request's, but in that case 37195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * we'll ignore the result anyway */ 37295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *p = (unsigned char *)&s->init_buf->data[s->init_off]; 37395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley const struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr; 37495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int xlen; 37595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 376cc23df53da503b6095d4c8d0dd5207e90ebf4580David Benjamin if (frag_off == 0) 37795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 37895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* reconstruct message header is if it 37995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * is being sent in single fragment */ 38095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *p++ = msg_hdr->type; 38195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_hdr->msg_len,p); 38295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s2n (msg_hdr->seq,p); 38395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(0,p); 38495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_hdr->msg_len,p); 38595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley p -= DTLS1_HM_HEADER_LENGTH; 38695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley xlen = ret; 38795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 38895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 38995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 39095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley p += DTLS1_HM_HEADER_LENGTH; 39195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley xlen = ret - DTLS1_HM_HEADER_LENGTH; 39295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 39395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 39495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ssl3_finish_mac(s, p, xlen); 39595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 39695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 39795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (ret == s->init_num) 39895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 39995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->msg_callback) 40095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->msg_callback(1, s->version, type, s->init_buf->data, 40195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (size_t)(s->init_off + s->init_num), s, 40295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->msg_callback_arg); 40395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 40495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_off = 0; /* done writing this message */ 40595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = 0; 40695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 40795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return(1); 40895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 40995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_off+=ret; 41095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num-=ret; 41195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_off += (ret -= DTLS1_HM_HEADER_LENGTH); 41295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 41395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 41495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return(0); 41595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 41695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 41795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 41895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* Obtain handshake message of message type 'mt' (any if mt == -1), 41995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * maximum acceptable body length 'max'. 42095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Read an entire handshake message. Handshake messages arrive in 42195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * fragments. 42295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 423590cbe970c75973f38aeba4b7146dc0b84b66348David Benjaminlong dtls1_get_message(SSL *s, int st1, int stn, int mt, long max, int hash_message, int *ok) 42495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 42595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int i, al; 42695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley struct hm_header_st *msg_hdr; 42795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *p; 42895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long msg_len; 42995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 43095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* s3->tmp is used to store messages that are unexpected, caused 43195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * by the absence of an optional handshake message */ 43295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->s3->tmp.reuse_message) 43395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 434590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin /* A SSL_GET_MESSAGE_DONT_HASH_MESSAGE call cannot be combined 435590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin * with reuse_message; the SSL_GET_MESSAGE_DONT_HASH_MESSAGE 436590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin * would have to have been applied to the previous call. */ 437590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin assert(hash_message != SSL_GET_MESSAGE_DONT_HASH_MESSAGE); 43895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->s3->tmp.reuse_message=0; 43995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 44095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 44195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley al=SSL_AD_UNEXPECTED_MESSAGE; 44295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_get_message, SSL_R_UNEXPECTED_MESSAGE); 44395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto f_err; 44495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 44595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok=1; 44651b1f7427b6e153675ae4bcb75f3f5a6b44648f4David Benjamin s->init_msg = (uint8_t*)s->init_buf->data + DTLS1_HM_HEADER_LENGTH; 44795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = (int)s->s3->tmp.message_size; 44895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return s->init_num; 44995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 45095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 45195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr = &s->d1->r_msg_hdr; 45295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(msg_hdr, 0x00, sizeof(struct hm_header_st)); 45395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 45495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyagain: 45595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = dtls1_get_message_fragment(s, stn, max, ok); 45695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( i == DTLS1_HM_BAD_FRAGMENT || 45795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i == DTLS1_HM_FRAGMENT_RETRY) /* bad fragment received */ 45895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto again; 45995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else if ( i <= 0 && !*ok) 46095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return i; 46195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 46295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley p = (unsigned char *)s->init_buf->data; 46395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_len = msg_hdr->msg_len; 46495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 46595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* reconstruct message header */ 46695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *(p++) = msg_hdr->type; 46795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_len,p); 46895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s2n (msg_hdr->seq,p); 46995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(0,p); 47095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_len,p); 471cc23df53da503b6095d4c8d0dd5207e90ebf4580David Benjamin p -= DTLS1_HM_HEADER_LENGTH; 472cc23df53da503b6095d4c8d0dd5207e90ebf4580David Benjamin msg_len += DTLS1_HM_HEADER_LENGTH; 47395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 474590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin s->init_msg = (uint8_t*)s->init_buf->data + DTLS1_HM_HEADER_LENGTH; 475590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin 476590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin if (hash_message != SSL_GET_MESSAGE_DONT_HASH_MESSAGE) 477590cbe970c75973f38aeba4b7146dc0b84b66348David Benjamin ssl3_hash_current_message(s); 47895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->msg_callback) 47995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 48095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley p, msg_len, 48195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s, s->msg_callback_arg); 48295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 48395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(msg_hdr, 0x00, sizeof(struct hm_header_st)); 48495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 48595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Don't change sequence numbers while listening */ 48695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!s->d1->listen) 48795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->handshake_read_seq++; 48895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 48995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return s->init_num; 49095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 49195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyf_err: 49295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ssl3_send_alert(s,SSL3_AL_FATAL,al); 49395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 49495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return -1; 49595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 49695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 49795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 49895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic int dtls1_preprocess_fragment(SSL *s,struct hm_header_st *msg_hdr,int max) 49995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 50095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley size_t frag_off,frag_len,msg_len; 50195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 50295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_len = msg_hdr->msg_len; 50395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_off = msg_hdr->frag_off; 50495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_len = msg_hdr->frag_len; 50595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 50695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* sanity checking */ 50795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( (frag_off+frag_len) > msg_len) 50895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 50995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_preprocess_fragment, SSL_R_EXCESSIVE_MESSAGE_SIZE); 51095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return SSL_AD_ILLEGAL_PARAMETER; 51195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 51295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 51395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( (frag_off+frag_len) > (unsigned long)max) 51495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 51595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_preprocess_fragment, SSL_R_EXCESSIVE_MESSAGE_SIZE); 51695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return SSL_AD_ILLEGAL_PARAMETER; 51795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 51895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 51995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( s->d1->r_msg_hdr.frag_off == 0) /* first fragment */ 52095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 52195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* msg_len is limited to 2^24, but is effectively checked 52295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * against max above */ 52395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!BUF_MEM_grow_clean(s->init_buf,msg_len+DTLS1_HM_HEADER_LENGTH)) 52495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 52595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_preprocess_fragment, ERR_R_BUF_LIB); 52695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return SSL_AD_INTERNAL_ERROR; 52795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 52895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 52995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->s3->tmp.message_size = msg_len; 53095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->r_msg_hdr.msg_len = msg_len; 53195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->s3->tmp.message_type = msg_hdr->type; 53295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->r_msg_hdr.type = msg_hdr->type; 53395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->r_msg_hdr.seq = msg_hdr->seq; 53495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 53595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else if (msg_len != s->d1->r_msg_hdr.msg_len) 53695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 53795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* They must be playing with us! BTW, failure to enforce 53895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * upper limit would open possibility for buffer overrun. */ 53995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_preprocess_fragment, SSL_R_EXCESSIVE_MESSAGE_SIZE); 54095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return SSL_AD_ILLEGAL_PARAMETER; 54195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 54295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 54395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; /* no error */ 54495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 54595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 54695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 54795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic int 54895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_retrieve_buffered_fragment(SSL *s, long max, int *ok) 54995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 55095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* (0) check whether the desired fragment is available 55195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * if so: 55295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (1) copy over the fragment to s->init_buf->data[] 55395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (2) update s->init_num 55495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 55595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item; 55695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag; 55795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int al; 55895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 55995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 56095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pqueue_peek(s->d1->buffered_messages); 56195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( item == NULL) 56295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; 56395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 56495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = (hm_fragment *)item->data; 56595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 56695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Don't return if reassembly still in progress */ 56795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->reassembly != NULL) 56895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; 56995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 57095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( s->d1->handshake_read_seq == frag->msg_header.seq) 57195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 57295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long frag_len = frag->msg_header.frag_len; 57395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pqueue_pop(s->d1->buffered_messages); 57495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 57595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley al=dtls1_preprocess_fragment(s,&frag->msg_header,max); 57695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 57795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (al==0) /* no alert */ 57895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 57995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *p = (unsigned char *)s->init_buf->data+DTLS1_HM_HEADER_LENGTH; 58095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(&p[frag->msg_header.frag_off], 58195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->fragment,frag->msg_header.frag_len); 58295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 58395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 58495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_hm_fragment_free(frag); 58595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem_free(item); 58695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 58795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (al==0) 58895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 58995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 1; 59095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return frag_len; 59195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 59295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 59395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ssl3_send_alert(s,SSL3_AL_FATAL,al); 59495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = 0; 59595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 59695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return -1; 59795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 59895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 59995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; 60095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 60195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6022306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell/* dtls1_max_handshake_message_len returns the maximum number of bytes 6032306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell * permitted in a DTLS handshake message for |s|. The minimum is 16KB, but may 6042306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell * be greater if the maximum certificate list size requires it. */ 6052306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswellstatic unsigned long dtls1_max_handshake_message_len(const SSL *s) 6062306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell { 6072306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell unsigned long max_len = DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH; 6082306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell if (max_len < (unsigned long)s->max_cert_list) 6092306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell return s->max_cert_list; 6102306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell return max_len; 6112306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell } 61295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 61395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic int 614abae631fb9af14c60834c58769ef57979ff35eeeAdam Langleydtls1_reassemble_fragment(SSL *s, const struct hm_header_st* msg_hdr, int *ok) 61595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 61695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag = NULL; 61795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item = NULL; 61895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int i = -1, is_complete; 61995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char seq64be[8]; 6202306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell unsigned long frag_len = msg_hdr->frag_len; 62195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6222306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell if ((msg_hdr->frag_off+frag_len) > msg_hdr->msg_len || 6232306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell msg_hdr->msg_len > dtls1_max_handshake_message_len(s)) 62495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 62595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 626e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley if (frag_len == 0) 627e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley return DTLS1_HM_FRAGMENT_RETRY; 628e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley 62995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Try to find item in queue */ 63095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(seq64be,0,sizeof(seq64be)); 63195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[6] = (unsigned char) (msg_hdr->seq>>8); 63295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[7] = (unsigned char) msg_hdr->seq; 63395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pqueue_find(s->d1->buffered_messages, seq64be); 63495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 63595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (item == NULL) 63695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 63795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = dtls1_hm_fragment_new(msg_hdr->msg_len, 1); 63895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( frag == NULL) 63995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 64095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr)); 64195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.frag_len = frag->msg_header.msg_len; 64295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.frag_off = 0; 64395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 64495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 645bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley { 64695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = (hm_fragment*) item->data; 647bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley if (frag->msg_header.msg_len != msg_hdr->msg_len) 648bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley { 649bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley item = NULL; 650bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley frag = NULL; 651bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley goto err; 652bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley } 653bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley } 654bed2214b3ee623f0b817fddb1042f9b0d8735243Adam Langley 65595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* If message is already reassembled, this must be a 6563873f6f33d3faa5ff5cd34d4b094978862da2f6dMatt Caswell * retransmit and can be dropped. In this case item != NULL and so frag 6573873f6f33d3faa5ff5cd34d4b094978862da2f6dMatt Caswell * does not need to be freed. */ 65895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->reassembly == NULL) 65995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 66095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char devnull [256]; 66195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6623873f6f33d3faa5ff5cd34d4b094978862da2f6dMatt Caswell assert(item != NULL); 66395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley while (frag_len) 66495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 66595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 66695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley devnull, 66795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_len>sizeof(devnull)?sizeof(devnull):frag_len,0); 66895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (i<=0) goto err; 66995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_len -= i; 67095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 67195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return DTLS1_HM_FRAGMENT_RETRY; 67295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 67395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 67495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* read the body of the fragment (header has already been read */ 67595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 67695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->fragment + msg_hdr->frag_off,frag_len,0); 677e24f686e31e40013f7222e745facd9f18e56f4deMatt Caswell if ((unsigned long)i!=frag_len) 678e24f686e31e40013f7222e745facd9f18e56f4deMatt Caswell i=-1; 679e24f686e31e40013f7222e745facd9f18e56f4deMatt Caswell if (i<=0) 68095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 68195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 68295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley RSMBLY_BITMASK_MARK(frag->reassembly, (long)msg_hdr->frag_off, 68395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (long)(msg_hdr->frag_off + frag_len)); 68495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 68595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley RSMBLY_BITMASK_IS_COMPLETE(frag->reassembly, (long)msg_hdr->msg_len, 68695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley is_complete); 68795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 68895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (is_complete) 68995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 69095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_free(frag->reassembly); 69195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->reassembly = NULL; 69295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 69395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 69495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (item == NULL) 69595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 69695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pitem_new(seq64be, frag); 69795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (item == NULL) 69895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 69995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = -1; 700f10a63b050f353aea217cbc5da6c26b51d0bc2c0Adam Langley goto err; 70195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 70295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 703e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley item = pqueue_insert(s->d1->buffered_messages, item); 704e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley /* pqueue_insert fails iff a duplicate item is inserted. 705e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * However, |item| cannot be a duplicate. If it were, 706e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * |pqueue_find|, above, would have returned it and control 707e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * would never have reached this branch. */ 708e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley assert(item != NULL); 70995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 71095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 71195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return DTLS1_HM_FRAGMENT_RETRY; 71295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 71395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyerr: 714d06afe40ab84e3a99b90302399092ec4691a4fc1Adam Langley if (frag != NULL && item == NULL) dtls1_hm_fragment_free(frag); 71595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 71695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return i; 71795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 71895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 71995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 72095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic int 721abae631fb9af14c60834c58769ef57979ff35eeeAdam Langleydtls1_process_out_of_seq_message(SSL *s, const struct hm_header_st* msg_hdr, int *ok) 72295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ 72395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int i=-1; 72495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag = NULL; 72595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item = NULL; 72695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char seq64be[8]; 72795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long frag_len = msg_hdr->frag_len; 72895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 72995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((msg_hdr->frag_off+frag_len) > msg_hdr->msg_len) 73095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 73195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 73295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Try to find item in queue, to prevent duplicate entries */ 73395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(seq64be,0,sizeof(seq64be)); 73495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[6] = (unsigned char) (msg_hdr->seq>>8); 73595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[7] = (unsigned char) msg_hdr->seq; 73695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pqueue_find(s->d1->buffered_messages, seq64be); 73795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 73895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* If we already have an entry and this one is a fragment, 73995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * don't discard it and rather try to reassemble it. 74095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 741abae631fb9af14c60834c58769ef57979ff35eeeAdam Langley if (item != NULL && frag_len != msg_hdr->msg_len) 74295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = NULL; 74395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 74495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Discard the message if sequence number was already there, is 74595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * too far in the future, already in the queue or if we received 74695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * a FINISHED before the SERVER_HELLO, which then must be a stale 74795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * retransmit. 74895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 74995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (msg_hdr->seq <= s->d1->handshake_read_seq || 75095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->seq > s->d1->handshake_read_seq + 10 || item != NULL || 75195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (s->d1->handshake_read_seq == 0 && msg_hdr->type == SSL3_MT_FINISHED)) 75295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 75395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char devnull [256]; 75495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 75595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley while (frag_len) 75695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 75795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 75895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley devnull, 75995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_len>sizeof(devnull)?sizeof(devnull):frag_len,0); 76095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (i<=0) goto err; 76195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_len -= i; 76295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 76395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 76495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 76595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 766abae631fb9af14c60834c58769ef57979ff35eeeAdam Langley if (frag_len != msg_hdr->msg_len) 76795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return dtls1_reassemble_fragment(s, msg_hdr, ok); 76895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 7692306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell if (frag_len > dtls1_max_handshake_message_len(s)) 7702306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell goto err; 7712306fe5ff5611ea98f95405dc429bda0f29bcac1Matt Caswell 77295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = dtls1_hm_fragment_new(frag_len, 0); 77395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( frag == NULL) 77495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 77595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 77695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr)); 77795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 77895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag_len) 77995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 78095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* read the body of the fragment (header has already been read */ 78195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 78295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->fragment,frag_len,0); 7838506609ca38110eeda86d40416de7ebf3e6f9035Adam Langley if ((unsigned long)i!=frag_len) 7848506609ca38110eeda86d40416de7ebf3e6f9035Adam Langley i = -1; 7858506609ca38110eeda86d40416de7ebf3e6f9035Adam Langley if (i<=0) 78695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 78795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 78895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 78995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pitem_new(seq64be, frag); 79095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( item == NULL) 79195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 79295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 793e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley item = pqueue_insert(s->d1->buffered_messages, item); 794e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley /* pqueue_insert fails iff a duplicate item is inserted. 795e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * However, |item| cannot be a duplicate. If it were, 796e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * |pqueue_find|, above, would have returned it. Then, either 797e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * |frag_len| != |msg_hdr->msg_len| in which case |item| is set 798e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * to NULL and it will have been processed with 799e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * |dtls1_reassemble_fragment|, above, or the record will have 800e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley * been discarded. */ 801e951ff4fc3fe9582561f7f25ad793ab7e23da785Adam Langley assert(item != NULL); 80295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 80395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 80495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return DTLS1_HM_FRAGMENT_RETRY; 80595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 80695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyerr: 807d06afe40ab84e3a99b90302399092ec4691a4fc1Adam Langley if (frag != NULL && item == NULL) dtls1_hm_fragment_free(frag); 80895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 80995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return i; 81095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 81195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 81295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 81395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic long 81495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_get_message_fragment(SSL *s, int stn, long max, int *ok) 81595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 81695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char wire[DTLS1_HM_HEADER_LENGTH]; 81795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long len, frag_off, frag_len; 81895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int i,al; 81995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley struct hm_header_st msg_hdr; 82095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 821895780572b7895784ed7088248ecb2ed5dd0c97aAdam Langley redo: 82295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* see if we have the required fragment already */ 82395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((frag_len = dtls1_retrieve_buffered_fragment(s,max,ok)) || *ok) 82495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 82595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (*ok) s->init_num = frag_len; 82695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return frag_len; 82795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 82895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 82995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* read handshake message header */ 83095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,wire, 83195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley DTLS1_HM_HEADER_LENGTH, 0); 83295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (i <= 0) /* nbio, or an error */ 83395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 83495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->rwstate=SSL_READING; 83595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 83695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return i; 83795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 83895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Handshake fails if message header is incomplete */ 83995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (i != DTLS1_HM_HEADER_LENGTH) 84095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 84195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley al=SSL_AD_UNEXPECTED_MESSAGE; 84295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_get_message_fragment, SSL_R_UNEXPECTED_MESSAGE); 84395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto f_err; 84495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 84595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 84695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* parse the message fragment header */ 84795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_get_message_header(wire, &msg_hdr); 84895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 84995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* 85095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * if this is a future (or stale) message it gets buffered 85195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (or dropped)--no further processing at this time 85295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * While listening, we accept seq 1 (ClientHello with cookie) 85395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * although we're still expecting seq 0 (ClientHello) 85495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 85595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (msg_hdr.seq != s->d1->handshake_read_seq && !(s->d1->listen && msg_hdr.seq == 1)) 85695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return dtls1_process_out_of_seq_message(s, &msg_hdr, ok); 85795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 85895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len = msg_hdr.msg_len; 85995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_off = msg_hdr.frag_off; 86095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_len = msg_hdr.frag_len; 86195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 86295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag_len && frag_len < len) 86395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return dtls1_reassemble_fragment(s, &msg_hdr, ok); 86495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 86595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!s->server && s->d1->r_msg_hdr.frag_off == 0 && 86695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley wire[0] == SSL3_MT_HELLO_REQUEST) 86795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 86895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* The server may always send 'Hello Request' messages -- 86995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * we are doing a handshake anyway now, so ignore them 87095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * if their format is correct. Does not count for 87195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 'Finished' MAC. */ 87295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (wire[1] == 0 && wire[2] == 0 && wire[3] == 0) 87395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 87495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->msg_callback) 87595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 87695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley wire, DTLS1_HM_HEADER_LENGTH, s, 87795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->msg_callback_arg); 87895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 87995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = 0; 880895780572b7895784ed7088248ecb2ed5dd0c97aAdam Langley goto redo; 88195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 88295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else /* Incorrectly formated Hello request */ 88395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 88495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley al=SSL_AD_UNEXPECTED_MESSAGE; 88595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_get_message_fragment, SSL_R_UNEXPECTED_MESSAGE); 88695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto f_err; 88795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 88895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 88995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 89095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((al=dtls1_preprocess_fragment(s,&msg_hdr,max))) 89195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto f_err; 89295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 89395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* XDTLS: ressurect this when restart is in place */ 89495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->state=stn; 89595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 89695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( frag_len > 0) 89795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 89895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *p=(unsigned char *)s->init_buf->data+DTLS1_HM_HEADER_LENGTH; 89995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 90095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 90195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley &p[frag_off],frag_len,0); 90295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* XDTLS: fix this--message fragments cannot span multiple packets */ 90395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (i <= 0) 90495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 90595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->rwstate=SSL_READING; 90695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 0; 90795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return i; 90895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 90995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 91095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 91195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley i = 0; 91295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 91395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* XDTLS: an incorrectly formatted fragment should cause the 91495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * handshake to fail */ 91595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (i != (int)frag_len) 91695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 91795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley al=SSL3_AD_ILLEGAL_PARAMETER; 91895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(SSL, dtls1_get_message_fragment, SSL3_AD_ILLEGAL_PARAMETER); 91995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto f_err; 92095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 92195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 92295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok = 1; 92395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 92495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Note that s->init_num is *not* used as current offset in 92595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * s->init_buf->data, but as a counter summing up fragments' 92695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * lengths: as soon as they sum up to handshake packet 92795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * length, we assume we have got all the fragments. */ 92895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = frag_len; 92995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return frag_len; 93095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 93195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyf_err: 93295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ssl3_send_alert(s,SSL3_AL_FATAL,al); 93395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = 0; 93495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 93595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *ok=0; 93695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return(-1); 93795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 93895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 93995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* for these 2 messages, we need to 94095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ssl->enc_read_ctx re-init 94195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ssl->s3->read_sequence zero 94295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ssl->s3->read_mac_secret re-init 94395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ssl->session->read_sym_enc assign 94495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ssl->session->read_compression assign 94595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ssl->session->read_hash assign 94695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 94795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint dtls1_send_change_cipher_spec(SSL *s, int a, int b) 94895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 94995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char *p; 95095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 95195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (s->state == a) 95295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 95395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley p=(unsigned char *)s->init_buf->data; 95495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *p++=SSL3_MT_CCS; 95595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->handshake_write_seq = s->d1->next_handshake_write_seq; 95695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num=DTLS1_CCS_HEADER_LENGTH; 95795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 95895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_off=0; 95995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 96095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_set_message_header_int(s, SSL3_MT_CCS, 0, 96195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->handshake_write_seq, 0, 0); 96295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 96395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* buffer the message to handle re-xmits */ 96495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_buffer_message(s, 1); 96595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 96695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->state=b; 96795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 96895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 96995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* SSL3_ST_CW_CHANGE_B */ 97095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return(dtls1_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 97195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 97295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 97395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint dtls1_read_failed(SSL *s, int code) 97495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 97595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( code > 0) 97695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 97795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf( stderr, "invalid state reached %s:%d", __FILE__, __LINE__); 97895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 1; 97995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 98095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 98195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!dtls1_is_timer_expired(s)) 98295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 98395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* not a timeout, none of our business, 98495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley let higher layers handle this. in fact it's probably an error */ 98595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return code; 98695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 98795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 98895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!SSL_in_init(s)) /* done, no need to send a retransmit */ 98995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 99095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BIO_set_flags(SSL_get_rbio(s), BIO_FLAGS_READ); 99195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return code; 99295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 99395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 99495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#if 0 /* for now, each alert contains only one record number */ 99595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pqueue_peek(state->rcvd_records); 99695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( item ) 99795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 99895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* send an alert immediately for all the missing records */ 99995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 100095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 100195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#endif 100295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 100395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#if 0 /* no more alert sending, just retransmit the last set of messages */ 100495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( state->timeout.read_timeouts >= DTLS1_TMO_READ_COUNT) 100595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ssl3_send_alert(s,SSL3_AL_WARNING, 100695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 100795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#endif 100895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 100995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return dtls1_handle_timeout(s); 101095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 101195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 101295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint 101395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_get_queue_priority(unsigned short seq, int is_ccs) 101495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 101595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* The index of the retransmission queue actually is the message sequence number, 101695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * since the queue only contains messages of a single handshake. However, the 101795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ChangeCipherSpec has no message sequence number and so using only the sequence 101895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * will result in the CCS and Finished having the same index. To prevent this, 101995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * the sequence number is multiplied by 2. In case of a CCS 1 is subtracted. 102095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * This does not only differ CSS and Finished, it also maintains the order of the 102195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * index (important for priority queues) and fits in the unsigned short variable. 102295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 102395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return seq * 2 - is_ccs; 102495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 102595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 102695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint 102795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_retransmit_buffered_messages(SSL *s) 102895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 102995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pqueue sent = s->d1->sent_messages; 103095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley piterator iter; 103195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item; 103295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag; 103395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int found = 0; 103495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 103595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley iter = pqueue_iterator(sent); 103695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 103795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for ( item = pqueue_next(&iter); item != NULL; item = pqueue_next(&iter)) 103895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 103995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = (hm_fragment *)item->data; 104095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( dtls1_retransmit_message(s, 104195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (unsigned short)dtls1_get_queue_priority(frag->msg_header.seq, frag->msg_header.is_ccs), 104295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 0, &found) <= 0 && found) 104395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 104495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf(stderr, "dtls1_retransmit_message() failed\n"); 104595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return -1; 104695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 104795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 104895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 104995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 1; 105095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 105195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 105295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint 105395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_buffer_message(SSL *s, int is_ccs) 105495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 105595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item; 105695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag; 105795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char seq64be[8]; 105895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 105995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* this function is called immediately after a message has 106095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * been serialized */ 106195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->init_off == 0); 106295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 106395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = dtls1_hm_fragment_new(s->init_num, 0); 1064e044fe4bc773061589d40bf56011843570fd63aaAdam Langley if (!frag) 1065e044fe4bc773061589d40bf56011843570fd63aaAdam Langley return 0; 106695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 106795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(frag->fragment, s->init_buf->data, s->init_num); 106895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 106995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( is_ccs) 107095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 107195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->d1->w_msg_hdr.msg_len + 107295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley DTLS1_CCS_HEADER_LENGTH == (unsigned int)s->init_num); 107395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 107495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 107595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 107695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->d1->w_msg_hdr.msg_len + 107795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley DTLS1_HM_HEADER_LENGTH == (unsigned int)s->init_num); 107895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 107995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 108095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.msg_len = s->d1->w_msg_hdr.msg_len; 108195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.seq = s->d1->w_msg_hdr.seq; 108295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.type = s->d1->w_msg_hdr.type; 108395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.frag_off = 0; 108495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.frag_len = s->d1->w_msg_hdr.msg_len; 108595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.is_ccs = is_ccs; 108695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 108795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* save current state*/ 108895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.saved_retransmit_state.enc_write_ctx = s->enc_write_ctx; 108995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.saved_retransmit_state.write_hash = s->write_hash; 109095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.saved_retransmit_state.session = s->session; 109195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.saved_retransmit_state.epoch = s->d1->w_epoch; 109295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 109395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(seq64be,0,sizeof(seq64be)); 109495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[6] = (unsigned char)(dtls1_get_queue_priority(frag->msg_header.seq, 109595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.is_ccs)>>8); 109695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[7] = (unsigned char)(dtls1_get_queue_priority(frag->msg_header.seq, 109795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.is_ccs)); 109895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 109995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pitem_new(seq64be, frag); 110095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( item == NULL) 110195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 110295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_hm_fragment_free(frag); 110395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; 110495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 110595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 110695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#if 0 110795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf( stderr, "buffered messge: \ttype = %xx\n", msg_buf->type); 110895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf( stderr, "\t\t\t\t\tlen = %d\n", msg_buf->len); 110995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf( stderr, "\t\t\t\t\tseq_num = %d\n", msg_buf->seq_num); 111095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#endif 111195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 111295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pqueue_insert(s->d1->sent_messages, item); 111395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 1; 111495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 111595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 111695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint 111795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_retransmit_message(SSL *s, unsigned short seq, unsigned long frag_off, 111895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int *found) 111995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 112095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int ret; 112195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* XDTLS: for now assuming that read/writes are blocking */ 112295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item; 112395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley hm_fragment *frag ; 112495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long header_length; 112595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char seq64be[8]; 112695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley struct dtls1_retransmit_state saved_state; 112795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned char save_write_sequence[8]; 112895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 112995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* 113095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->init_num == 0); 113195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley assert(s->init_off == 0); 113295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 113395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 113495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* XDTLS: the requested message ought to be found, otherwise error */ 113595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(seq64be,0,sizeof(seq64be)); 113695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[6] = (unsigned char)(seq>>8); 113795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley seq64be[7] = (unsigned char)seq; 113895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 113995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item = pqueue_find(s->d1->sent_messages, seq64be); 114095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( item == NULL) 114195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 114295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley fprintf(stderr, "retransmit: message %d non-existant\n", seq); 114395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *found = 0; 114495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; 114595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 114695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 114795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *found = 1; 114895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag = (hm_fragment *)item->data; 114995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 115095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( frag->msg_header.is_ccs) 115195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley header_length = DTLS1_CCS_HEADER_LENGTH; 115295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else 115395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley header_length = DTLS1_HM_HEADER_LENGTH; 115495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 115595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(s->init_buf->data, frag->fragment, 115695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.msg_len + header_length); 115795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->init_num = frag->msg_header.msg_len + header_length; 115895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 115995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_set_message_header_int(s, frag->msg_header.type, 116095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.msg_len, frag->msg_header.seq, 0, 116195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag->msg_header.frag_len); 116295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 116395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* save current state */ 116495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley saved_state.enc_write_ctx = s->enc_write_ctx; 116595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley saved_state.write_hash = s->write_hash; 116695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley saved_state.session = s->session; 116795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley saved_state.epoch = s->d1->w_epoch; 116895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 116995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->retransmitting = 1; 117095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 117195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* restore state in which the message was originally sent */ 117295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->enc_write_ctx = frag->msg_header.saved_retransmit_state.enc_write_ctx; 117395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->write_hash = frag->msg_header.saved_retransmit_state.write_hash; 117495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->session = frag->msg_header.saved_retransmit_state.session; 117595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->w_epoch = frag->msg_header.saved_retransmit_state.epoch; 117695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 117795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->msg_header.saved_retransmit_state.epoch == saved_state.epoch - 1) 117895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 117995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(save_write_sequence, s->s3->write_sequence, sizeof(s->s3->write_sequence)); 118095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(s->s3->write_sequence, s->d1->last_write_sequence, sizeof(s->s3->write_sequence)); 118195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 118295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 118395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret = dtls1_do_write(s, frag->msg_header.is_ccs ? 118495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley SSL3_RT_CHANGE_CIPHER_SPEC : SSL3_RT_HANDSHAKE); 118595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 118695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* restore current state */ 118795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->enc_write_ctx = saved_state.enc_write_ctx; 118895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->write_hash = saved_state.write_hash; 118995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->session = saved_state.session; 119095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->w_epoch = saved_state.epoch; 119195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 119295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag->msg_header.saved_retransmit_state.epoch == saved_state.epoch - 1) 119395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 119495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(s->d1->last_write_sequence, s->s3->write_sequence, sizeof(s->s3->write_sequence)); 119595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(s->s3->write_sequence, save_write_sequence, sizeof(s->s3->write_sequence)); 119695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 119795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 119895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->retransmitting = 0; 119995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 120095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (void)BIO_flush(SSL_get_wbio(s)); 120195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return ret; 120295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 120395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 120495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* call this function when the buffered messages are no longer needed */ 120595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyvoid 120695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_clear_record_buffer(SSL *s) 120795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 120895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem *item; 120995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 121095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for(item = pqueue_pop(s->d1->sent_messages); 121195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley item != NULL; item = pqueue_pop(s->d1->sent_messages)) 121295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 121395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_hm_fragment_free((hm_fragment *)item->data); 121495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley pitem_free(item); 121595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 121695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 121795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 121895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 121995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyunsigned char * 122095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_set_message_header(SSL *s, unsigned char *p, unsigned char mt, 122195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long len, unsigned long frag_off, unsigned long frag_len) 122295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 122395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* Don't change sequence numbers while listening */ 122495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (frag_off == 0 && !s->d1->listen) 122595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 122695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->handshake_write_seq = s->d1->next_handshake_write_seq; 122795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s->d1->next_handshake_write_seq++; 122895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 122995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 123095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley dtls1_set_message_header_int(s, mt, len, s->d1->handshake_write_seq, 123195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley frag_off, frag_len); 123295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 123395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return p += DTLS1_HM_HEADER_LENGTH; 123495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 123595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 123695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 123795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* don't actually do the writing, wait till the MTU has been retrieved */ 123895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic void 123995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_set_message_header_int(SSL *s, unsigned char mt, 124095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long len, unsigned short seq_num, unsigned long frag_off, 124195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long frag_len) 124295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 124395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr; 124495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 124595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->type = mt; 124695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->msg_len = len; 124795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->seq = seq_num; 124895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->frag_off = frag_off; 124995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->frag_len = frag_len; 125095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 125195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 125295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic void 125395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_fix_message_header(SSL *s, unsigned long frag_off, 125495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned long frag_len) 125595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 125695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr; 125795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 125895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->frag_off = frag_off; 125995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->frag_len = frag_len; 126095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 126195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 126295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic unsigned char * 126395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_write_message_header(SSL *s, unsigned char *p) 126495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 126595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr; 126695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 126795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley *p++ = msg_hdr->type; 126895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_hdr->msg_len, p); 126995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 127095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley s2n(msg_hdr->seq, p); 127195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_hdr->frag_off, p); 127295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley l2n3(msg_hdr->frag_len, p); 127395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 127495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return p; 127595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 127695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 127795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyunsigned int 127895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_min_mtu(void) 127995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 128095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return (g_probable_mtu[(sizeof(g_probable_mtu) / 128195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sizeof(g_probable_mtu[0])) - 1]); 128295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 128395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 128495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleystatic unsigned int 128595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_guess_mtu(unsigned int curr_mtu) 128695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 128795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned int i; 128895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 128995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( curr_mtu == 0 ) 129095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return g_probable_mtu[0] ; 129195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 129295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for ( i = 0; i < sizeof(g_probable_mtu)/sizeof(g_probable_mtu[0]); i++) 129395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ( curr_mtu > g_probable_mtu[i]) 129495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return g_probable_mtu[i]; 129595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 129695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return curr_mtu; 129795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 129895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 129995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyvoid 130095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_get_message_header(unsigned char *data, struct hm_header_st *msg_hdr) 130195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 130295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(msg_hdr, 0x00, sizeof(struct hm_header_st)); 130395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley msg_hdr->type = *(data++); 130495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley n2l3(data, msg_hdr->msg_len); 130595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 130695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley n2s(data, msg_hdr->seq); 130795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley n2l3(data, msg_hdr->frag_off); 130895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley n2l3(data, msg_hdr->frag_len); 130995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 131095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 131195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyvoid 131295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydtls1_get_ccs_header(unsigned char *data, struct ccs_header_st *ccs_hdr) 131395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 131495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(ccs_hdr, 0x00, sizeof(struct ccs_header_st)); 131595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 131695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ccs_hdr->type = *(data++); 131795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 131895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 131995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint dtls1_shutdown(SSL *s) 132095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { 132195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int ret; 132295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret = ssl3_shutdown(s); 132395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return ret; 132495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 1325