/* ssl/d1_lib.c */ /* * DTLS implementation written by Nagendra Modadugu * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. */ /* ==================================================================== * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include <stdio.h> #include <openssl/objects.h> #include "ssl_locl.h" const char dtls1_version_str[]="DTLSv1" OPENSSL_VERSION_PTEXT; SSL3_ENC_METHOD DTLSv1_enc_data={ dtls1_enc, tls1_mac, tls1_setup_key_block, tls1_generate_master_secret, tls1_change_cipher_state, tls1_final_finish_mac, TLS1_FINISH_MAC_LENGTH, tls1_cert_verify_mac, TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE, TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE, tls1_alert_code, }; long dtls1_default_timeout(void) { /* 2 hours, the 24 hours mentioned in the DTLSv1 spec * is way too long for http, the cache would over fill */ return(60*60*2); } IMPLEMENT_dtls1_meth_func(dtlsv1_base_method, ssl_undefined_function, ssl_undefined_function, ssl_bad_method) int dtls1_new(SSL *s) { DTLS1_STATE *d1; if (!ssl3_new(s)) return(0); if ((d1=OPENSSL_malloc(sizeof *d1)) == NULL) return (0); memset(d1,0, sizeof *d1); /* d1->handshake_epoch=0; */ #if defined(OPENSSL_SYS_VMS) || defined(VMS_TEST) d1->bitmap.length=64; #else d1->bitmap.length=sizeof(d1->bitmap.map) * 8; #endif pq_64bit_init(&(d1->bitmap.map)); pq_64bit_init(&(d1->bitmap.max_seq_num)); d1->next_bitmap.length = d1->bitmap.length; pq_64bit_init(&(d1->next_bitmap.map)); pq_64bit_init(&(d1->next_bitmap.max_seq_num)); d1->unprocessed_rcds.q=pqueue_new(); d1->processed_rcds.q=pqueue_new(); d1->buffered_messages = pqueue_new(); d1->sent_messages=pqueue_new(); if ( s->server) { d1->cookie_len = sizeof(s->d1->cookie); } if( ! d1->unprocessed_rcds.q || ! d1->processed_rcds.q || ! d1->buffered_messages || ! d1->sent_messages) { if ( d1->unprocessed_rcds.q) pqueue_free(d1->unprocessed_rcds.q); if ( d1->processed_rcds.q) pqueue_free(d1->processed_rcds.q); if ( d1->buffered_messages) pqueue_free(d1->buffered_messages); if ( d1->sent_messages) pqueue_free(d1->sent_messages); OPENSSL_free(d1); return (0); } s->d1=d1; s->method->ssl_clear(s); return(1); } void dtls1_free(SSL *s) { pitem *item = NULL; hm_fragment *frag = NULL; ssl3_free(s); while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL) { OPENSSL_free(item->data); pitem_free(item); } pqueue_free(s->d1->unprocessed_rcds.q); while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL) { OPENSSL_free(item->data); pitem_free(item); } pqueue_free(s->d1->processed_rcds.q); while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL) { frag = (hm_fragment *)item->data; OPENSSL_free(frag->fragment); OPENSSL_free(frag); pitem_free(item); } pqueue_free(s->d1->buffered_messages); while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL) { frag = (hm_fragment *)item->data; OPENSSL_free(frag->fragment); OPENSSL_free(frag); pitem_free(item); } pqueue_free(s->d1->sent_messages); pq_64bit_free(&(s->d1->bitmap.map)); pq_64bit_free(&(s->d1->bitmap.max_seq_num)); pq_64bit_free(&(s->d1->next_bitmap.map)); pq_64bit_free(&(s->d1->next_bitmap.max_seq_num)); OPENSSL_free(s->d1); } void dtls1_clear(SSL *s) { ssl3_clear(s); s->version=DTLS1_VERSION; } /* * As it's impossible to use stream ciphers in "datagram" mode, this * simple filter is designed to disengage them in DTLS. Unfortunately * there is no universal way to identify stream SSL_CIPHER, so we have * to explicitly list their SSL_* codes. Currently RC4 is the only one * available, but if new ones emerge, they will have to be added... */ SSL_CIPHER *dtls1_get_cipher(unsigned int u) { SSL_CIPHER *ciph = ssl3_get_cipher(u); if (ciph != NULL) { if ((ciph->algorithms&SSL_ENC_MASK) == SSL_RC4) return NULL; } return ciph; }