1d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * All rights reserved. 3d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 4d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This package is an SSL implementation written 5d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * by Eric Young (eay@cryptsoft.com). 6d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The implementation was written so as to conform with Netscapes SSL. 7d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 8d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This library is free for commercial and non-commercial use as long as 9d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the following conditions are aheared to. The following conditions 10d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * apply to all code found in this distribution, be it the RC4, RSA, 11d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * included with this distribution is covered by the same copyright terms 13d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * except that the holder is Tim Hudson (tjh@cryptsoft.com). 14d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 15d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Copyright remains Eric Young's, and as such any Copyright notices in 16d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the code are not to be removed. 17d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * If this package is used in a product, Eric Young should be given attribution 18d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * as the author of the parts of the library used. 19d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This can be in the form of a textual message at program startup or 20d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * in documentation (online or textual) provided with the package. 21d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 22d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Redistribution and use in source and binary forms, with or without 23d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * modification, are permitted provided that the following conditions 24d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * are met: 25d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 1. Redistributions of source code must retain the copyright 26d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * notice, this list of conditions and the following disclaimer. 27d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 2. Redistributions in binary form must reproduce the above copyright 28d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * notice, this list of conditions and the following disclaimer in the 29d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * documentation and/or other materials provided with the distribution. 30d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 3. All advertising materials mentioning features or use of this software 31d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * must display the following acknowledgement: 32d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * "This product includes cryptographic software written by 33d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Eric Young (eay@cryptsoft.com)" 34d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The word 'cryptographic' can be left out if the rouines from the library 35d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * being used are not cryptographic related :-). 36d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 4. If you include any Windows specific code (or a derivative thereof) from 37d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the apps directory (application code) you must include an acknowledgement: 38d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 39d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 40d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * SUCH DAMAGE. 51d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 52d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The licence and distribution terms for any publically available version or 53d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * derivative of this code cannot be changed. i.e. this code cannot simply be 54d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * copied and put under another distribution licence 55d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * [including the GNU Public Licence.] 56d9e397b599b13d642138480a28c14db7a136bf0Adam Langley */ 57d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* ==================================================================== 58d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. 59d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 60d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Redistribution and use in source and binary forms, with or without 61d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * modification, are permitted provided that the following conditions 62d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * are met: 63d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 64d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 1. Redistributions of source code must retain the above copyright 65d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * notice, this list of conditions and the following disclaimer. 66d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 67d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 2. Redistributions in binary form must reproduce the above copyright 68d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * notice, this list of conditions and the following disclaimer in 69d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the documentation and/or other materials provided with the 70d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * distribution. 71d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 72d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 3. All advertising materials mentioning features or use of this 73d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * software must display the following acknowledgment: 74d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * "This product includes software developed by the OpenSSL Project 75d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 76d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 77d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 78d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * endorse or promote products derived from this software without 79d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * prior written permission. For written permission, please contact 80d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * openssl-core@openssl.org. 81d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 82d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 5. Products derived from this software may not be called "OpenSSL" 83d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * nor may "OpenSSL" appear in their names without prior written 84d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * permission of the OpenSSL Project. 85d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 86d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 6. Redistributions of any form whatsoever must retain the following 87d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * acknowledgment: 88d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * "This product includes software developed by the OpenSSL Project 89d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 90d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 91d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 92d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 94d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 95d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 96d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 97d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 98d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 100d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 101d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 102d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * OF THE POSSIBILITY OF SUCH DAMAGE. 103d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ==================================================================== 104d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 105d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This product includes cryptographic software written by Eric Young 106d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * (eay@cryptsoft.com). This product includes software written by Tim 107d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Hudson (tjh@cryptsoft.com). */ 108d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 109b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root#include <openssl/ssl.h> 110b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 111d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <assert.h> 112d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <limits.h> 113d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <stdio.h> 114e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley#include <string.h> 115d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 116d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <openssl/buf.h> 117d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <openssl/err.h> 118d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <openssl/evp.h> 119d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <openssl/mem.h> 120d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <openssl/rand.h> 121d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 122e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley#include "internal.h" 123d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 124d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1254139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleystatic int do_ssl3_write(SSL *ssl, int type, const uint8_t *buf, unsigned len); 126d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 127b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root/* kMaxWarningAlerts is the number of consecutive warning alerts that will be 128b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root * processed. */ 129b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Rootstatic const uint8_t kMaxWarningAlerts = 4; 130d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 131b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root/* ssl3_get_record reads a new input record. On success, it places it in 132b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root * |ssl->s3->rrec| and returns one. Otherwise it returns <= 0 on error or if 133b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root * more data is needed. */ 134b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Rootstatic int ssl3_get_record(SSL *ssl) { 135b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root int ret; 136b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Rootagain: 137b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root /* Ensure the buffer is large enough to decrypt in-place. */ 138b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root ret = ssl_read_buffer_extend_to(ssl, ssl_record_prefix_len(ssl)); 139b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (ret <= 0) { 140b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return ret; 141b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root } 142b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root assert(ssl_read_buffer_len(ssl) >= ssl_record_prefix_len(ssl)); 143b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 144b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root uint8_t *out = ssl_read_buffer(ssl) + ssl_record_prefix_len(ssl); 145b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root size_t max_out = ssl_read_buffer_len(ssl) - ssl_record_prefix_len(ssl); 146b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root uint8_t type, alert; 147b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root size_t len, consumed; 148b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root switch (tls_open_record(ssl, &type, out, &len, &consumed, &alert, max_out, 149b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root ssl_read_buffer(ssl), ssl_read_buffer_len(ssl))) { 150b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root case ssl_open_record_success: 151b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root ssl_read_buffer_consume(ssl, consumed); 152b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 153b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (len > 0xffff) { 154b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); 155b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return -1; 156d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 157d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 158b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root SSL3_RECORD *rr = &ssl->s3->rrec; 159b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root rr->type = type; 160b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root rr->length = (uint16_t)len; 161b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root rr->data = out; 162b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return 1; 163b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 164b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root case ssl_open_record_partial: 165b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root ret = ssl_read_buffer_extend_to(ssl, consumed); 166b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (ret <= 0) { 167b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return ret; 168d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 169b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root goto again; 170d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 171b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root case ssl_open_record_discard: 172b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root ssl_read_buffer_consume(ssl, consumed); 173b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root goto again; 174d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 175b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root case ssl_open_record_error: 176b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); 177b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return -1; 178a04d78d392463df4e69a64360c952ffa5abd22f7Kenny Root } 179a04d78d392463df4e69a64360c952ffa5abd22f7Kenny Root 180b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root assert(0); 181b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 182b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return -1; 183d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 184d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 185f4e427204234da139fd0585def4b4e22502e33f0Adam Langleyint ssl3_write_app_data(SSL *ssl, const void *buf, int len) { 186f4e427204234da139fd0585def4b4e22502e33f0Adam Langley return ssl3_write_bytes(ssl, SSL3_RT_APPLICATION_DATA, buf, len); 187f4e427204234da139fd0585def4b4e22502e33f0Adam Langley} 188f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 189d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Call this to write data in records of type |type|. It will return <= 0 if 190d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * not all data has been sent or non-blocking IO. */ 1914139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_write_bytes(SSL *ssl, int type, const void *buf_, int len) { 192d9e397b599b13d642138480a28c14db7a136bf0Adam Langley const uint8_t *buf = buf_; 193d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unsigned int tot, n, nw; 194d9e397b599b13d642138480a28c14db7a136bf0Adam Langley int i; 195d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1964139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->rwstate = SSL_NOTHING; 1974139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley assert(ssl->s3->wnum <= INT_MAX); 1984139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley tot = ssl->s3->wnum; 1994139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wnum = 0; 200d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 2014139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (!ssl->in_handshake && SSL_in_init(ssl) && !SSL_in_false_start(ssl)) { 2024139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley i = ssl->handshake_func(ssl); 203d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i < 0) { 204d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return i; 205d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 206d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i == 0) { 207b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_HANDSHAKE_FAILURE); 208d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 209d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 210d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 211d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 212d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* Ensure that if we end up with a smaller value of data to write out than 213d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the the original len from a write which didn't complete for non-blocking 214d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * I/O and also somehow ended up avoiding the check for this in 215d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be possible to 216d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * end up with (len-tot) as a large number that will then promptly send 217d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * beyond the end of the users buffer ... so we trap and report the error in 218d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * a way the user will notice. */ 219d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (len < 0 || (size_t)len < tot) { 220b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_LENGTH); 221d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 222d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 223d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 224d9e397b599b13d642138480a28c14db7a136bf0Adam Langley n = (len - tot); 225d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for (;;) { 226d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* max contains the maximum number of bytes that we can put into a 227d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * record. */ 2284139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley unsigned max = ssl->max_send_fragment; 229d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (n > max) { 230d9e397b599b13d642138480a28c14db7a136bf0Adam Langley nw = max; 231d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 232d9e397b599b13d642138480a28c14db7a136bf0Adam Langley nw = n; 233d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 234d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 2354139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley i = do_ssl3_write(ssl, type, &buf[tot], nw); 236d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i <= 0) { 2374139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wnum = tot; 238d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return i; 239d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 240d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 241d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i == (int)n || (type == SSL3_RT_APPLICATION_DATA && 2424139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley (ssl->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { 243d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return tot + i; 244d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 245d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 246d9e397b599b13d642138480a28c14db7a136bf0Adam Langley n -= i; 247d9e397b599b13d642138480a28c14db7a136bf0Adam Langley tot += i; 248d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 249d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 250d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 2514139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleystatic int ssl3_write_pending(SSL *ssl, int type, const uint8_t *buf, 252fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley unsigned int len) { 2534139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->s3->wpend_tot > (int)len || 2544139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley (ssl->s3->wpend_buf != buf && 2554139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley !(ssl->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) || 2564139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wpend_type != type) { 257fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_WRITE_RETRY); 258fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley return -1; 259fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley } 260fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley 2614139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley int ret = ssl_write_buffer_flush(ssl); 262fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley if (ret <= 0) { 263fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley return ret; 264fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley } 2654139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return ssl->s3->wpend_ret; 266fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley} 267fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley 268b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root/* do_ssl3_write writes an SSL record of the given type. */ 2694139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleystatic int do_ssl3_write(SSL *ssl, int type, const uint8_t *buf, unsigned len) { 270b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root /* If there is still data from the previous record, flush it. */ 2714139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl_write_buffer_is_pending(ssl)) { 2724139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return ssl3_write_pending(ssl, type, buf, len); 273d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 274d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 275d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* If we have an alert to send, lets send it */ 2764139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->s3->alert_dispatch) { 2774139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley int ret = ssl->method->ssl_dispatch_alert(ssl); 278e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley if (ret <= 0) { 279e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley return ret; 280d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 281d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* if it went, fall through and send more stuff */ 282d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 283d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 284b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (len > SSL3_RT_MAX_PLAIN_LENGTH) { 285b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 286d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 287d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 288d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 289d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (len == 0) { 290d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 291d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 292d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 2934139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley size_t max_out = len + ssl_max_seal_overhead(ssl); 294b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (max_out < len) { 295b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); 296b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root return -1; 297d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 298b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root uint8_t *out; 299e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley size_t ciphertext_len; 3004139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (!ssl_write_buffer_init(ssl, &out, max_out) || 3014139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley !tls_seal_record(ssl, out, &ciphertext_len, max_out, type, buf, len)) { 302e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley return -1; 303d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 3044139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl_write_buffer_set_len(ssl, ciphertext_len); 305d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 306d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* memorize arguments so that ssl3_write_pending can detect bad write retries 307d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * later */ 3084139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wpend_tot = len; 3094139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wpend_buf = buf; 3104139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wpend_type = type; 3114139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->wpend_ret = len; 312d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 313d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* we now just need to write the buffer */ 3144139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return ssl3_write_pending(ssl, type, buf, len); 315d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 316d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 3174139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_read_app_data(SSL *ssl, uint8_t *buf, int len, int peek) { 3184139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return ssl3_read_bytes(ssl, SSL3_RT_APPLICATION_DATA, buf, len, peek); 3194139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley} 3204139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley 3214139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_read_change_cipher_spec(SSL *ssl) { 3224139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley uint8_t byte; 3234139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley int ret = ssl3_read_bytes(ssl, SSL3_RT_CHANGE_CIPHER_SPEC, &byte, 1 /* len */, 3244139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley 0 /* no peek */); 3254139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ret <= 0) { 3264139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return ret; 327d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 3284139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley assert(ret == 1); 329d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 3304139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->s3->rrec.length != 0 || byte != SSL3_MT_CCS) { 3314139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_CHANGE_CIPHER_SPEC); 3324139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); 3334139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return -1; 3344139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley } 335d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 3364139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->msg_callback != NULL) { 3374139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->msg_callback(0, ssl->version, SSL3_RT_CHANGE_CIPHER_SPEC, &byte, 1, 3384139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl, ssl->msg_callback_arg); 3394139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley } 3404139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley 3414139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return 1; 342f4e427204234da139fd0585def4b4e22502e33f0Adam Langley} 343f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 344f4e427204234da139fd0585def4b4e22502e33f0Adam Langleyvoid ssl3_read_close_notify(SSL *ssl) { 345f4e427204234da139fd0585def4b4e22502e33f0Adam Langley ssl3_read_bytes(ssl, 0, NULL, 0, 0); 346f4e427204234da139fd0585def4b4e22502e33f0Adam Langley} 347f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 348e99801b603dea8893dcc61c70b327ef2d00b652cKenny Rootstatic int ssl3_can_renegotiate(SSL *ssl) { 349e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root switch (ssl->renegotiate_mode) { 350e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root case ssl_renegotiate_never: 351e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root return 0; 352e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root case ssl_renegotiate_once: 353e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root return ssl->s3->total_renegotiations == 0; 354e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root case ssl_renegotiate_freely: 355e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root return 1; 356fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley case ssl_renegotiate_ignore: 357fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley return 1; 358e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root } 359e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root 360e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root assert(0); 361e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root return 0; 362e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root} 363e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root 364d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Return up to 'len' payload bytes received in 'type' records. 365d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 'type' is one of the following: 366d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 367d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) 3684139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * - SSL3_RT_CHANGE_CIPHER_SPEC (when ssl3_read_change_cipher_spec calls us) 3694139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * - SSL3_RT_APPLICATION_DATA (when ssl3_read_app_data calls us) 370d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * - 0 (during a shutdown, no data has to be returned) 371d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 372d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * If we don't have stored data to work from, read a SSL/TLS record first 373d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * (possibly multiple records if we still don't have anything to return). 374d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 375d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This function must handle any surprises the peer may have for us, such as 3764139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * Alert records (e.g. close_notify) or renegotiation requests. */ 3774139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_read_bytes(SSL *ssl, int type, uint8_t *buf, int len, int peek) { 378e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley int al, i, ret; 379d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unsigned int n; 380d9e397b599b13d642138480a28c14db7a136bf0Adam Langley SSL3_RECORD *rr; 381e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root void (*cb)(const SSL *ssl, int type, int value) = NULL; 382d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 3834139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if ((type && type != SSL3_RT_APPLICATION_DATA && type != SSL3_RT_HANDSHAKE && 3844139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley type != SSL3_RT_CHANGE_CIPHER_SPEC) || 385d9e397b599b13d642138480a28c14db7a136bf0Adam Langley (peek && type != SSL3_RT_APPLICATION_DATA)) { 386b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 387d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 388d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 389d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 390e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley /* This may require multiple iterations. False Start will cause 3914139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * |ssl->handshake_func| to signal success one step early, but the handshake 392e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley * must be completely finished before other modes are accepted. 393e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley * 394e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley * TODO(davidben): Move this check up to a higher level. */ 3954139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley while (!ssl->in_handshake && SSL_in_init(ssl)) { 396e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley assert(type == SSL3_RT_APPLICATION_DATA); 3974139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley i = ssl->handshake_func(ssl); 398d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i < 0) { 399d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return i; 400d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 401d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i == 0) { 402b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_HANDSHAKE_FAILURE); 403d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 404d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 405d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 406d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 407d9e397b599b13d642138480a28c14db7a136bf0Adam Langleystart: 4084139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->rwstate = SSL_NOTHING; 409d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 4104139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley /* ssl->s3->rrec.type - is the type of record 4114139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * ssl->s3->rrec.data - data 4124139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * ssl->s3->rrec.off - offset into 'data' for next read 4134139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * ssl->s3->rrec.length - number of bytes. */ 4144139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley rr = &ssl->s3->rrec; 415d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 416d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* get new packet if necessary */ 417b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (rr->length == 0) { 4184139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ret = ssl3_get_record(ssl); 419d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (ret <= 0) { 420d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return ret; 421d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 422d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 423d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 424d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* we now have a packet which can be read and processed */ 425d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 426d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* If the other end has shut down, throw anything we read away (even in 427d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 'peek' mode) */ 4284139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->shutdown & SSL_RECEIVED_SHUTDOWN) { 429d9e397b599b13d642138480a28c14db7a136bf0Adam Langley rr->length = 0; 4304139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->rwstate = SSL_NOTHING; 431d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 432d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 433d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 434b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (type != 0 && type == rr->type) { 4354139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->warning_alert_count = 0; 436b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 4374139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley /* Make sure that we are not getting application data when we are doing a 4384139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * handshake for the first time. */ 4394139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (SSL_in_init(ssl) && type == SSL3_RT_APPLICATION_DATA && 4404139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->aead_read_ctx == NULL) { 441d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* TODO(davidben): Is this check redundant with the handshake_func 442d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * check? */ 443d9e397b599b13d642138480a28c14db7a136bf0Adam Langley al = SSL_AD_UNEXPECTED_MESSAGE; 444b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_APP_DATA_IN_HANDSHAKE); 445d9e397b599b13d642138480a28c14db7a136bf0Adam Langley goto f_err; 446d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 447d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 448b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root /* Discard empty records. */ 449b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root if (rr->length == 0) { 450b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root goto start; 451b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root } 452b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 453d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (len <= 0) { 454d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return len; 455d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 456d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 457d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ((unsigned int)len > rr->length) { 458d9e397b599b13d642138480a28c14db7a136bf0Adam Langley n = rr->length; 459d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 460d9e397b599b13d642138480a28c14db7a136bf0Adam Langley n = (unsigned int)len; 461d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 462d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 4634139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley memcpy(buf, rr->data, n); 464d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (!peek) { 465d9e397b599b13d642138480a28c14db7a136bf0Adam Langley rr->length -= n; 4664139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley rr->data += n; 467d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (rr->length == 0) { 468b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root /* The record has been consumed, so we may now clear the buffer. */ 4694139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl_read_buffer_discard(ssl); 470d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 471d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 472d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 473d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return n; 474d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 475d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 476f4e427204234da139fd0585def4b4e22502e33f0Adam Langley /* Process unexpected records. */ 477d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 4784139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (type == SSL3_RT_APPLICATION_DATA && rr->type == SSL3_RT_HANDSHAKE) { 479e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley /* If peer renegotiations are disabled, all out-of-order handshake records 480f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * are fatal. Renegotiations as a server are never supported. */ 4814139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->server || !ssl3_can_renegotiate(ssl)) { 482e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley al = SSL_AD_NO_RENEGOTIATION; 483b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_NO_RENEGOTIATION); 484e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley goto f_err; 485e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley } 486e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley 4874139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley /* This must be a HelloRequest, possibly fragmented over multiple records. 4884139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley * Consume data from the handshake protocol until it is complete. */ 4894139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley static const uint8_t kHelloRequest[] = {SSL3_MT_HELLO_REQUEST, 0, 0, 0}; 4904139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley while (ssl->s3->hello_request_len < sizeof(kHelloRequest)) { 4914139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (rr->length == 0) { 4924139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley /* Get a new record. */ 4934139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley goto start; 4944139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley } 4954139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (rr->data[0] != kHelloRequest[ssl->s3->hello_request_len]) { 4964139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley al = SSL_AD_DECODE_ERROR; 4974139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_HELLO_REQUEST); 4984139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley goto f_err; 4994139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley } 5004139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley rr->data++; 5014139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley rr->length--; 5024139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->hello_request_len++; 503d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 5044139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->hello_request_len = 0; 505d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 5064139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->msg_callback) { 5074139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->msg_callback(0, ssl->version, SSL3_RT_HANDSHAKE, kHelloRequest, 5084139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley sizeof(kHelloRequest), ssl, ssl->msg_callback_arg); 509d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 510d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 5114139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (!SSL_is_init_finished(ssl) || !ssl->s3->initial_handshake_complete) { 512f4e427204234da139fd0585def4b4e22502e33f0Adam Langley /* This cannot happen. If a handshake is in progress, |type| must be 513f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * |SSL3_RT_HANDSHAKE|. */ 514f4e427204234da139fd0585def4b4e22502e33f0Adam Langley assert(0); 515b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 516f4e427204234da139fd0585def4b4e22502e33f0Adam Langley goto err; 517f4e427204234da139fd0585def4b4e22502e33f0Adam Langley } 518f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 5194139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->renegotiate_mode == ssl_renegotiate_ignore) { 520fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley goto start; 521fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley } 522fad6327e4112082b1e77e89a995723f26bd5a9aaAdam Langley 523f4e427204234da139fd0585def4b4e22502e33f0Adam Langley /* Renegotiation is only supported at quiescent points in the application 524f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * protocol, namely in HTTPS, just before reading the HTTP response. Require 525f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * the record-layer be idle and avoid complexities of sending a handshake 526f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * record while an application_data record is being written. */ 5274139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl_write_buffer_is_pending(ssl)) { 528f4e427204234da139fd0585def4b4e22502e33f0Adam Langley al = SSL_AD_NO_RENEGOTIATION; 529b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_NO_RENEGOTIATION); 530f4e427204234da139fd0585def4b4e22502e33f0Adam Langley goto f_err; 531f4e427204234da139fd0585def4b4e22502e33f0Adam Langley } 532f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 533f4e427204234da139fd0585def4b4e22502e33f0Adam Langley /* Begin a new handshake. */ 5344139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->total_renegotiations++; 5354139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->state = SSL_ST_CONNECT; 5364139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley i = ssl->handshake_func(ssl); 537f4e427204234da139fd0585def4b4e22502e33f0Adam Langley if (i < 0) { 538f4e427204234da139fd0585def4b4e22502e33f0Adam Langley return i; 539f4e427204234da139fd0585def4b4e22502e33f0Adam Langley } 540f4e427204234da139fd0585def4b4e22502e33f0Adam Langley if (i == 0) { 541b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_HANDSHAKE_FAILURE); 542f4e427204234da139fd0585def4b4e22502e33f0Adam Langley return -1; 543d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 544f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 545f4e427204234da139fd0585def4b4e22502e33f0Adam Langley /* The handshake completed synchronously. Continue reading records. */ 546d9e397b599b13d642138480a28c14db7a136bf0Adam Langley goto start; 547d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 548d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 549e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley /* If an alert record, process one alert out of the record. Note that we allow 550e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley * a single record to contain multiple alerts. */ 551d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (rr->type == SSL3_RT_ALERT) { 552e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley /* Alerts may not be fragmented. */ 553e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley if (rr->length < 2) { 554e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley al = SSL_AD_DECODE_ERROR; 555b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ALERT); 556e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley goto f_err; 557e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley } 558d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 5594139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->msg_callback) { 5604139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->msg_callback(0, ssl->version, SSL3_RT_ALERT, rr->data, 2, ssl, 5614139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->msg_callback_arg); 562d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 5634139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley const uint8_t alert_level = rr->data[0]; 5644139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley const uint8_t alert_descr = rr->data[1]; 565e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley rr->length -= 2; 5664139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley rr->data += 2; 567d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 5684139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->info_callback != NULL) { 5694139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley cb = ssl->info_callback; 5704139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley } else if (ssl->ctx->info_callback != NULL) { 5714139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley cb = ssl->ctx->info_callback; 572d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 573d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 574d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (cb != NULL) { 575e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley uint16_t alert = (alert_level << 8) | alert_descr; 5764139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley cb(ssl, SSL_CB_READ_ALERT, alert); 577d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 578d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 579e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley if (alert_level == SSL3_AL_WARNING) { 5804139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->warn_alert = alert_descr; 581d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (alert_descr == SSL_AD_CLOSE_NOTIFY) { 5824139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->shutdown |= SSL_RECEIVED_SHUTDOWN; 583d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 584d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 585d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 586d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* This is a warning but we receive it if we requested renegotiation and 587d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the peer denied it. Terminate with a fatal alert because if 588d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * application tried to renegotiatie it presumably had a good reason and 589d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * expects it to succeed. 590d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 591d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * In future we might have a renegotiation where we don't care if the 592d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * peer refused it where we carry on. */ 593d9e397b599b13d642138480a28c14db7a136bf0Adam Langley else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { 594d9e397b599b13d642138480a28c14db7a136bf0Adam Langley al = SSL_AD_HANDSHAKE_FAILURE; 595b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_NO_RENEGOTIATION); 596b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root goto f_err; 597b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root } 598b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root 5994139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->warning_alert_count++; 6004139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->s3->warning_alert_count > kMaxWarningAlerts) { 601b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root al = SSL_AD_UNEXPECTED_MESSAGE; 602b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_TOO_MANY_WARNING_ALERTS); 603d9e397b599b13d642138480a28c14db7a136bf0Adam Langley goto f_err; 604d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 605e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley } else if (alert_level == SSL3_AL_FATAL) { 606d9e397b599b13d642138480a28c14db7a136bf0Adam Langley char tmp[16]; 607d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6084139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->rwstate = SSL_NOTHING; 6094139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->fatal_alert = alert_descr; 610b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_AD_REASON_OFFSET + alert_descr); 611d9e397b599b13d642138480a28c14db7a136bf0Adam Langley BIO_snprintf(tmp, sizeof(tmp), "%d", alert_descr); 612d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ERR_add_error_data(2, "SSL alert number ", tmp); 6134139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->shutdown |= SSL_RECEIVED_SHUTDOWN; 6144139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley SSL_CTX_remove_session(ssl->ctx, ssl->session); 615d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 616d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 617d9e397b599b13d642138480a28c14db7a136bf0Adam Langley al = SSL_AD_ILLEGAL_PARAMETER; 618b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_ALERT_TYPE); 619d9e397b599b13d642138480a28c14db7a136bf0Adam Langley goto f_err; 620d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 621d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 622d9e397b599b13d642138480a28c14db7a136bf0Adam Langley goto start; 623d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 624d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6254139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->shutdown & SSL_SENT_SHUTDOWN) { 626b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root /* close_notify has been sent, so discard all records other than alerts. */ 627d9e397b599b13d642138480a28c14db7a136bf0Adam Langley rr->length = 0; 628b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root goto start; 629d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 630d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 631e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley al = SSL_AD_UNEXPECTED_MESSAGE; 632b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_RECORD); 633d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 634d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyf_err: 6354139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl3_send_alert(ssl, SSL3_AL_FATAL, al); 636d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyerr: 637d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 638d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 639d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6404139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_do_change_cipher_spec(SSL *ssl) { 641d9e397b599b13d642138480a28c14db7a136bf0Adam Langley int i; 642d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6434139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->state & SSL_ST_ACCEPT) { 644d9e397b599b13d642138480a28c14db7a136bf0Adam Langley i = SSL3_CHANGE_CIPHER_SERVER_READ; 645d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 646d9e397b599b13d642138480a28c14db7a136bf0Adam Langley i = SSL3_CHANGE_CIPHER_CLIENT_READ; 647d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 648d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6494139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->s3->tmp.key_block == NULL) { 6504139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->session == NULL || ssl->session->master_key_length == 0) { 651d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* might happen if dtls1_read_bytes() calls this */ 652b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root OPENSSL_PUT_ERROR(SSL, SSL_R_CCS_RECEIVED_EARLY); 653d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 654d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 655d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6564139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->session->cipher = ssl->s3->tmp.new_cipher; 6574139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (!ssl->enc_method->setup_key_block(ssl)) { 658d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 659d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 660d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 661d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6624139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (!ssl->enc_method->change_cipher_state(ssl, i)) { 663d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 0; 664d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 665d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 666d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return 1; 667d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 668d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6694139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_send_alert(SSL *ssl, int level, int desc) { 670d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* Map tls/ssl alert value to correct one */ 6714139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley desc = ssl->enc_method->alert_value(desc); 6724139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION) { 673d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* SSL 3.0 does not have protocol_version alerts */ 674d9e397b599b13d642138480a28c14db7a136bf0Adam Langley desc = SSL_AD_HANDSHAKE_FAILURE; 675d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 676d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (desc < 0) { 677d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 678d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 679d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 680d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* If a fatal one, remove from cache */ 6814139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (level == 2 && ssl->session != NULL) { 6824139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley SSL_CTX_remove_session(ssl->ctx, ssl->session); 683d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 684d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6854139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->alert_dispatch = 1; 6864139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->send_alert[0] = level; 6874139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->send_alert[1] = desc; 6884139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (!ssl_write_buffer_is_pending(ssl)) { 689b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root /* Nothing is being written out, so the alert may be dispatched 690b8494591d1b1a143f3b192d845c238bbf3bc629dKenny Root * immediately. */ 6914139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley return ssl->method->ssl_dispatch_alert(ssl); 692d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 693d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 694d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* else data is still being written out, we will get written some time in the 695d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * future */ 696d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return -1; 697d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 698d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 6994139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langleyint ssl3_dispatch_alert(SSL *ssl) { 700d9e397b599b13d642138480a28c14db7a136bf0Adam Langley int i, j; 701e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root void (*cb)(const SSL *ssl, int type, int value) = NULL; 702d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 7034139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->alert_dispatch = 0; 7044139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley i = do_ssl3_write(ssl, SSL3_RT_ALERT, &ssl->s3->send_alert[0], 2); 705d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (i <= 0) { 7064139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->s3->alert_dispatch = 1; 707d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 708d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* Alert sent to BIO. If it is important, flush it now. If the message 709d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * does not get sent due to non-blocking IO, we will not worry too much. */ 7104139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->s3->send_alert[0] == SSL3_AL_FATAL) { 7114139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley BIO_flush(ssl->wbio); 712d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 713d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 7144139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->msg_callback) { 7154139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl->msg_callback(1, ssl->version, SSL3_RT_ALERT, ssl->s3->send_alert, 2, 7164139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley ssl, ssl->msg_callback_arg); 717d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 718d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 7194139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley if (ssl->info_callback != NULL) { 7204139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley cb = ssl->info_callback; 7214139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley } else if (ssl->ctx->info_callback != NULL) { 7224139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley cb = ssl->ctx->info_callback; 723d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 724d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 725d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (cb != NULL) { 7264139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley j = (ssl->s3->send_alert[0] << 8) | ssl->s3->send_alert[1]; 7274139edb02e59e7ad48e0a8f4c02e45923bc8a344Adam Langley cb(ssl, SSL_CB_WRITE_ALERT, j); 728d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 729d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 730d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 731d9e397b599b13d642138480a28c14db7a136bf0Adam Langley return i; 732d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 733