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https://origsvn.digium.com/svn/asterisk/branches/1.8 ........ r284477 | twilson | 2010-09-01 13:44:36 -0500 (Wed, 01 Sep 2010) | 17 lines Fix SRTP for changing SSRC and multiple a=crypto SDP lines Adding code to Asterisk that changed the SSRC during bridges and masquerades broke SRTP functionality. Also broken was handling the situation where an incoming INVITE had more than one crypto offer. This patch caches the SRTP policies the we use so that we can change the ssrc and inform libsrtp of the new streams. It also uses the first acceptable a=crypto line from the incoming INVITE. (closes issue #17563) Reported by: Alexcr Patches: srtp.diff uploaded by twilson (license 396) Tested by: twilson Review: https://reviewboard.asterisk.org/r/878/ ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@284479 65c4cc65-6c06-0410-ace0-fbb531ad65f3
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2010 FIXME
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief SRTP resource
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*/
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#ifndef _ASTERISK_RES_SRTP_H
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#define _ASTERISK_RES_SRTP_H
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struct ast_srtp;
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struct ast_srtp_policy;
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struct ast_rtp_instance;
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struct ast_srtp_cb {
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int (*no_ctx)(struct ast_rtp_instance *rtp, unsigned long ssrc, void *data);
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};
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struct ast_srtp_res {
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int (*create)(struct ast_srtp **srtp, struct ast_rtp_instance *rtp, struct ast_srtp_policy *policy);
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void (*destroy)(struct ast_srtp *srtp);
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int (*add_stream)(struct ast_srtp *srtp, struct ast_srtp_policy *policy);
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int (*change_source)(struct ast_srtp *srtp, unsigned int from_ssrc, unsigned int to_ssrc);
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void (*set_cb)(struct ast_srtp *srtp, const struct ast_srtp_cb *cb, void *data);
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int (*unprotect)(struct ast_srtp *srtp, void *buf, int *size, int rtcp);
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int (*protect)(struct ast_srtp *srtp, void **buf, int *size, int rtcp);
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int (*get_random)(unsigned char *key, size_t len);
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};
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/* Crypto suites */
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enum ast_srtp_suite {
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AST_AES_CM_128_HMAC_SHA1_80 = 1,
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AST_AES_CM_128_HMAC_SHA1_32 = 2,
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AST_F8_128_HMAC_SHA1_80 = 3
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};
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struct ast_srtp_policy_res {
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struct ast_srtp_policy *(*alloc)(void);
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void (*destroy)(struct ast_srtp_policy *policy);
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int (*set_suite)(struct ast_srtp_policy *policy, enum ast_srtp_suite suite);
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int (*set_master_key)(struct ast_srtp_policy *policy, const unsigned char *key, size_t key_len, const unsigned char *salt, size_t salt_len);
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void (*set_ssrc)(struct ast_srtp_policy *policy, unsigned long ssrc, int inbound);
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};
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#endif /* _ASTERISK_RES_SRTP_H */
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