1 /* ssl/d1_lib.c */ 2 /* 3 * DTLS implementation written by Nagendra Modadugu 4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. 5 */ 6 /* ==================================================================== 7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * openssl-core@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59 60 #include <stdio.h> 61 #include <openssl/objects.h> 62 #include "ssl_locl.h" 63 64 const char dtls1_version_str[]="DTLSv1" OPENSSL_VERSION_PTEXT; 65 66 SSL3_ENC_METHOD DTLSv1_enc_data={ 67 dtls1_enc, 68 tls1_mac, 69 tls1_setup_key_block, 70 tls1_generate_master_secret, 71 tls1_change_cipher_state, 72 tls1_final_finish_mac, 73 TLS1_FINISH_MAC_LENGTH, 74 tls1_cert_verify_mac, 75 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE, 76 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE, 77 tls1_alert_code, 78 }; 79 80 long dtls1_default_timeout(void) 81 { 82 /* 2 hours, the 24 hours mentioned in the DTLSv1 spec 83 * is way too long for http, the cache would over fill */ 84 return(60*60*2); 85 } 86 87 IMPLEMENT_dtls1_meth_func(dtlsv1_base_method, 88 ssl_undefined_function, 89 ssl_undefined_function, 90 ssl_bad_method) 91 92 int dtls1_new(SSL *s) 93 { 94 DTLS1_STATE *d1; 95 96 if (!ssl3_new(s)) return(0); 97 if ((d1=OPENSSL_malloc(sizeof *d1)) == NULL) return (0); 98 memset(d1,0, sizeof *d1); 99 100 /* d1->handshake_epoch=0; */ 101 #if defined(OPENSSL_SYS_VMS) || defined(VMS_TEST) 102 d1->bitmap.length=64; 103 #else 104 d1->bitmap.length=sizeof(d1->bitmap.map) * 8; 105 #endif 106 pq_64bit_init(&(d1->bitmap.map)); 107 pq_64bit_init(&(d1->bitmap.max_seq_num)); 108 109 pq_64bit_init(&(d1->next_bitmap.map)); 110 pq_64bit_init(&(d1->next_bitmap.max_seq_num)); 111 112 d1->unprocessed_rcds.q=pqueue_new(); 113 d1->processed_rcds.q=pqueue_new(); 114 d1->buffered_messages = pqueue_new(); 115 d1->sent_messages=pqueue_new(); 116 117 if ( s->server) 118 { 119 d1->cookie_len = sizeof(s->d1->cookie); 120 } 121 122 if( ! d1->unprocessed_rcds.q || ! d1->processed_rcds.q 123 || ! d1->buffered_messages || ! d1->sent_messages) 124 { 125 if ( d1->unprocessed_rcds.q) pqueue_free(d1->unprocessed_rcds.q); 126 if ( d1->processed_rcds.q) pqueue_free(d1->processed_rcds.q); 127 if ( d1->buffered_messages) pqueue_free(d1->buffered_messages); 128 if ( d1->sent_messages) pqueue_free(d1->sent_messages); 129 OPENSSL_free(d1); 130 return (0); 131 } 132 133 s->d1=d1; 134 s->method->ssl_clear(s); 135 return(1); 136 } 137 138 void dtls1_free(SSL *s) 139 { 140 pitem *item = NULL; 141 hm_fragment *frag = NULL; 142 143 ssl3_free(s); 144 145 while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL) 146 { 147 OPENSSL_free(item->data); 148 pitem_free(item); 149 } 150 pqueue_free(s->d1->unprocessed_rcds.q); 151 152 while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL) 153 { 154 OPENSSL_free(item->data); 155 pitem_free(item); 156 } 157 pqueue_free(s->d1->processed_rcds.q); 158 159 while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL) 160 { 161 frag = (hm_fragment *)item->data; 162 OPENSSL_free(frag->fragment); 163 OPENSSL_free(frag); 164 pitem_free(item); 165 } 166 pqueue_free(s->d1->buffered_messages); 167 168 while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL) 169 { 170 frag = (hm_fragment *)item->data; 171 OPENSSL_free(frag->fragment); 172 OPENSSL_free(frag); 173 pitem_free(item); 174 } 175 pqueue_free(s->d1->sent_messages); 176 177 pq_64bit_free(&(s->d1->bitmap.map)); 178 pq_64bit_free(&(s->d1->bitmap.max_seq_num)); 179 180 pq_64bit_free(&(s->d1->next_bitmap.map)); 181 pq_64bit_free(&(s->d1->next_bitmap.max_seq_num)); 182 183 OPENSSL_free(s->d1); 184 } 185 186 void dtls1_clear(SSL *s) 187 { 188 ssl3_clear(s); 189 s->version=DTLS1_VERSION; 190 } 191