140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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* Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* DTLS code by Eric Rescorla <ekr@rtfm.com>
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*
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* Copyright (C) 2006, Network Resonance, Inc. Copyright (C) 2011, RTFM, Inc.
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*/
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#include <stdio.h>
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#include <openssl/objects.h>
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#include "ssl_local.h"
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#ifndef OPENSSL_NO_SRTP
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static SRTP_PROTECTION_PROFILE srtp_known_profiles[] = {
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{
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"SRTP_AES128_CM_SHA1_80",
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SRTP_AES128_CM_SHA1_80,
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},
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{
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"SRTP_AES128_CM_SHA1_32",
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SRTP_AES128_CM_SHA1_32,
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},
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{
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"SRTP_AEAD_AES_128_GCM",
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SRTP_AEAD_AES_128_GCM,
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},
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{
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"SRTP_AEAD_AES_256_GCM",
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SRTP_AEAD_AES_256_GCM,
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},
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{0}
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};
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static int find_profile_by_name(char *profile_name,
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SRTP_PROTECTION_PROFILE **pptr, size_t len)
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{
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SRTP_PROTECTION_PROFILE *p;
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p = srtp_known_profiles;
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while (p->name) {
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if ((len == strlen(p->name))
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&& strncmp(p->name, profile_name, len) == 0) {
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*pptr = p;
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return 0;
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}
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p++;
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}
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return 1;
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}
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static int ssl_ctx_make_profiles(const char *profiles_string,
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STACK_OF(SRTP_PROTECTION_PROFILE) **out)
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{
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STACK_OF(SRTP_PROTECTION_PROFILE) *profiles;
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char *col;
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char *ptr = (char *)profiles_string;
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SRTP_PROTECTION_PROFILE *p;
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if ((profiles = sk_SRTP_PROTECTION_PROFILE_new_null()) == NULL) {
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SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
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SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
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return 1;
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}
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do {
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col = strchr(ptr, ':');
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if (!find_profile_by_name(ptr, &p, col ? (size_t)(col - ptr)
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: strlen(ptr))) {
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if (sk_SRTP_PROTECTION_PROFILE_find(profiles, p) >= 0) {
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SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
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SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
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goto err;
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}
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if (!sk_SRTP_PROTECTION_PROFILE_push(profiles, p)) {
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SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
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SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
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goto err;
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}
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} else {
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SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
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SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
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goto err;
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}
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if (col)
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ptr = col + 1;
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} while (col);
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sk_SRTP_PROTECTION_PROFILE_free(*out);
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*out = profiles;
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return 0;
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err:
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sk_SRTP_PROTECTION_PROFILE_free(profiles);
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return 1;
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}
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int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles)
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{
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return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles);
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}
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int SSL_set_tlsext_use_srtp(SSL *s, const char *profiles)
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{
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return ssl_ctx_make_profiles(profiles, &s->srtp_profiles);
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}
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STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *s)
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{
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if (s != NULL) {
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if (s->srtp_profiles != NULL) {
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return s->srtp_profiles;
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} else if ((s->ctx != NULL) && (s->ctx->srtp_profiles != NULL)) {
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return s->ctx->srtp_profiles;
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}
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}
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return NULL;
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}
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SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *s)
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{
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return s->srtp_profile;
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}
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#endif
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