/* $OpenBSD: d1_srtp.c,v 1.29 2021/06/11 15:28:13 landry Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * 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 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 acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS 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 AUTHOR OR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2006 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). * */ /* * DTLS code by Eric Rescorla * * Copyright (C) 2006, Network Resonance, Inc. * Copyright (C) 2011, RTFM, Inc. */ #include #include #include #ifndef OPENSSL_NO_SRTP #include "bytestring.h" #include "dtls_locl.h" #include "ssl_locl.h" #include "srtp.h" static const SRTP_PROTECTION_PROFILE srtp_known_profiles[] = { { "SRTP_AES128_CM_SHA1_80", SRTP_AES128_CM_SHA1_80, }, { "SRTP_AES128_CM_SHA1_32", SRTP_AES128_CM_SHA1_32, }, { "SRTP_AEAD_AES_128_GCM", SRTP_AEAD_AES_128_GCM, }, { "SRTP_AEAD_AES_256_GCM", SRTP_AEAD_AES_256_GCM, }, {0} }; int srtp_find_profile_by_name(const char *profile_name, const SRTP_PROTECTION_PROFILE **pptr, unsigned int len) { const SRTP_PROTECTION_PROFILE *p; p = srtp_known_profiles; while (p->name) { if ((len == strlen(p->name)) && !strncmp(p->name, profile_name, len)) { *pptr = p; return 0; } p++; } return 1; } int srtp_find_profile_by_num(unsigned int profile_num, const SRTP_PROTECTION_PROFILE **pptr) { const SRTP_PROTECTION_PROFILE *p; p = srtp_known_profiles; while (p->name) { if (p->id == profile_num) { *pptr = p; return 0; } p++; } return 1; } static int ssl_ctx_make_profiles(const char *profiles_string, STACK_OF(SRTP_PROTECTION_PROFILE) **out) { STACK_OF(SRTP_PROTECTION_PROFILE) *profiles; char *col; const char *ptr = profiles_string; const SRTP_PROTECTION_PROFILE *p; if (!(profiles = sk_SRTP_PROTECTION_PROFILE_new_null())) { SSLerrorx(SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES); return 1; } do { col = strchr(ptr, ':'); if (!srtp_find_profile_by_name(ptr, &p, col ? col - ptr : (int)strlen(ptr))) { sk_SRTP_PROTECTION_PROFILE_push(profiles, p); } else { SSLerrorx(SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE); sk_SRTP_PROTECTION_PROFILE_free(profiles); return 1; } if (col) ptr = col + 1; } while (col); sk_SRTP_PROTECTION_PROFILE_free(*out); *out = profiles; return 0; } int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles) { return ssl_ctx_make_profiles(profiles, &ctx->internal->srtp_profiles); } int SSL_set_tlsext_use_srtp(SSL *s, const char *profiles) { return ssl_ctx_make_profiles(profiles, &s->internal->srtp_profiles); } STACK_OF(SRTP_PROTECTION_PROFILE) * SSL_get_srtp_profiles(SSL *s) { if (s != NULL) { if (s->internal->srtp_profiles != NULL) { return s->internal->srtp_profiles; } else if ((s->ctx != NULL) && (s->ctx->internal->srtp_profiles != NULL)) { return s->ctx->internal->srtp_profiles; } } return NULL; } SRTP_PROTECTION_PROFILE * SSL_get_selected_srtp_profile(SSL *s) { /* XXX cast away the const */ return (SRTP_PROTECTION_PROFILE *)s->internal->srtp_profile; } #endif