--- /dev/null
+/* 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"
+
+#ifndef OPENSSL_NO_SRTP
+
+#include "srtp.h"
+
+
+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
projects / cassiopeia.git / blobdiff