diff options
Diffstat (limited to 'thirdparty/openssl/ssl/d1_srtp.c')
| -rw-r--r-- | thirdparty/openssl/ssl/d1_srtp.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/thirdparty/openssl/ssl/d1_srtp.c b/thirdparty/openssl/ssl/d1_srtp.c new file mode 100644 index 0000000000..64d0634a38 --- /dev/null +++ b/thirdparty/openssl/ssl/d1_srtp.c @@ -0,0 +1,448 @@ +/* ssl/t1_lib.c */ +/* 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 <ekr@rtfm.com> + * + * Copyright (C) 2006, Network Resonance, Inc. Copyright (C) 2011, RTFM, Inc. + */ + +#include <stdio.h> +#include <openssl/objects.h> +#include "ssl_locl.h" +#include "srtp.h" + +#ifndef OPENSSL_NO_SRTP + +static 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, + }, +# if 0 + { + "SRTP_NULL_SHA1_80", + SRTP_NULL_SHA1_80, + }, + { + "SRTP_NULL_SHA1_32", + SRTP_NULL_SHA1_32, + }, +# endif + {0} +}; + +static int find_profile_by_name(char *profile_name, + SRTP_PROTECTION_PROFILE **pptr, unsigned len) +{ + 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; +} + +static int ssl_ctx_make_profiles(const char *profiles_string, + STACK_OF(SRTP_PROTECTION_PROFILE) **out) +{ + STACK_OF(SRTP_PROTECTION_PROFILE) *profiles; + + char *col; + char *ptr = (char *)profiles_string; + + SRTP_PROTECTION_PROFILE *p; + + if (!(profiles = sk_SRTP_PROTECTION_PROFILE_new_null())) { + SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES, + SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES); + return 1; + } + + do { + col = strchr(ptr, ':'); + + if (!find_profile_by_name(ptr, &p, + col ? col - ptr : (int)strlen(ptr))) { + if (sk_SRTP_PROTECTION_PROFILE_find(profiles, p) >= 0) { + SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + sk_SRTP_PROTECTION_PROFILE_free(profiles); + return 1; + } + + sk_SRTP_PROTECTION_PROFILE_push(profiles, p); + } else { + SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES, + SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE); + sk_SRTP_PROTECTION_PROFILE_free(profiles); + return 1; + } + + if (col) + ptr = col + 1; + } while (col); + + *out = profiles; + + return 0; +} + +int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles) +{ + return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles); +} + +int SSL_set_tlsext_use_srtp(SSL *s, const char *profiles) +{ + return ssl_ctx_make_profiles(profiles, &s->srtp_profiles); +} + +STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *s) +{ + if (s != NULL) { + if (s->srtp_profiles != NULL) { + return s->srtp_profiles; + } else if ((s->ctx != NULL) && (s->ctx->srtp_profiles != NULL)) { + return s->ctx->srtp_profiles; + } + } + + return NULL; +} + +SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *s) +{ + return s->srtp_profile; +} + +/* + * Note: this function returns 0 length if there are no profiles specified + */ +int ssl_add_clienthello_use_srtp_ext(SSL *s, unsigned char *p, int *len, + int maxlen) +{ + int ct = 0; + int i; + STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = 0; + SRTP_PROTECTION_PROFILE *prof; + + clnt = SSL_get_srtp_profiles(s); + ct = sk_SRTP_PROTECTION_PROFILE_num(clnt); /* -1 if clnt == 0 */ + + if (p) { + if (ct == 0) { + SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT, + SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST); + return 1; + } + + if ((2 + ct * 2 + 1) > maxlen) { + SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT, + SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG); + return 1; + } + + /* Add the length */ + s2n(ct * 2, p); + for (i = 0; i < ct; i++) { + prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); + s2n(prof->id, p); + } + + /* Add an empty use_mki value */ + *p++ = 0; + } + + *len = 2 + ct * 2 + 1; + + return 0; +} + +int ssl_parse_clienthello_use_srtp_ext(SSL *s, unsigned char *d, int len, + int *al) +{ + SRTP_PROTECTION_PROFILE *sprof; + STACK_OF(SRTP_PROTECTION_PROFILE) *srvr; + int ct; + int mki_len; + int i, srtp_pref; + unsigned int id; + + /* Length value + the MKI length */ + if (len < 3) { + SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + /* Pull off the length of the cipher suite list */ + n2s(d, ct); + len -= 2; + + /* Check that it is even */ + if (ct % 2) { + SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + /* Check that lengths are consistent */ + if (len < (ct + 1)) { + SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + srvr = SSL_get_srtp_profiles(s); + s->srtp_profile = NULL; + /* Search all profiles for a match initially */ + srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr); + + while (ct) { + n2s(d, id); + ct -= 2; + len -= 2; + + /* + * Only look for match in profiles of higher preference than + * current match. + * If no profiles have been have been configured then this + * does nothing. + */ + for (i = 0; i < srtp_pref; i++) { + sprof = sk_SRTP_PROTECTION_PROFILE_value(srvr, i); + if (sprof->id == id) { + s->srtp_profile = sprof; + srtp_pref = i; + break; + } + } + } + + /* + * Now extract the MKI value as a sanity check, but discard it for now + */ + mki_len = *d; + d++; + len--; + + if (mki_len != len) { + SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_MKI_VALUE); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + return 0; +} + +int ssl_add_serverhello_use_srtp_ext(SSL *s, unsigned char *p, int *len, + int maxlen) +{ + if (p) { + if (maxlen < 5) { + SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT, + SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG); + return 1; + } + + if (s->srtp_profile == 0) { + SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT, + SSL_R_USE_SRTP_NOT_NEGOTIATED); + return 1; + } + s2n(2, p); + s2n(s->srtp_profile->id, p); + *p++ = 0; + } + *len = 5; + + return 0; +} + +int ssl_parse_serverhello_use_srtp_ext(SSL *s, unsigned char *d, int len, + int *al) +{ + unsigned id; + int i; + int ct; + + STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; + SRTP_PROTECTION_PROFILE *prof; + + if (len != 5) { + SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + n2s(d, ct); + if (ct != 2) { + SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + n2s(d, id); + if (*d) { /* Must be no MKI, since we never offer one */ + SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_MKI_VALUE); + *al = SSL_AD_ILLEGAL_PARAMETER; + return 1; + } + + clnt = SSL_get_srtp_profiles(s); + + /* Throw an error if the server gave us an unsolicited extension */ + if (clnt == NULL) { + SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT, + SSL_R_NO_SRTP_PROFILES); + *al = SSL_AD_DECODE_ERROR; + return 1; + } + + /* + * Check to see if the server gave us something we support (and + * presumably offered) + */ + for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { + prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); + + if (prof->id == id) { + s->srtp_profile = prof; + *al = 0; + return 0; + } + } + + SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT, + SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); + *al = SSL_AD_DECODE_ERROR; + return 1; +} + +#endif |