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update to cvs head srtp

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This commit is contained in:
Anthony Minessale
2013-01-17 17:59:53 -06:00
parent aad4da5b71
commit 72e2d183c1
100 changed files with 4732 additions and 1509 deletions
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libs/srtp/include/ekt.h
+201
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@@ -0,0 +1,201 @@
/*
* ekt.h
*
* interface to Encrypted Key Transport for SRTP
*
* David McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2005 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT HOLDERS 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.
*
*/
/*
* EKT implementation strategy
*
* use stream_template approach
*
* in srtp_unprotect, when a new stream appears, check if template has
* EKT defined, and if it does, then apply EKT processing
*
* question: will we want to allow key-sharing templates in addition
* to EKT templates? could define a new ssrc_type_t that's associated
* with an EKT, e.g. ssrc_any_ekt.
*
*
*/
#ifndef EKT_H
#define EKT_H
#ifdef __cplusplus
extern "C" {
#endif
#include "srtp_priv.h"
#define EKT_CIPHER_DEFAULT 1
#define EKT_CIPHER_AES_128_ECB 1
#define EKT_CIPHER_AES_192_KEY_WRAP 2
#define EKT_CIPHER_AES_256_KEY_WRAP 3
typedef uint16_t ekt_spi_t;
unsigned
ekt_octets_after_base_tag(ekt_stream_t ekt);
/*
* an srtp_policy_t structure can contain a pointer to an
* ekt_policy_t structure
*
* this structure holds all of the high level EKT information, and it
* is passed into libsrtp to indicate what policy should be in effect
*/
typedef struct ekt_policy_ctx_t {
ekt_spi_t spi; /* security parameter index */
uint8_t ekt_cipher_type;
uint8_t *ekt_key;
struct ekt_policy_ctx_t *next_ekt_policy;
} ekt_policy_ctx_t;
/*
* an ekt_data_t structure holds the data corresponding to an ekt key,
* spi, and so on
*/
typedef struct ekt_data_t {
ekt_spi_t spi;
uint8_t ekt_cipher_type;
aes_expanded_key_t ekt_enc_key;
aes_expanded_key_t ekt_dec_key;
struct ekt_data_t *next_ekt_data;
} ekt_data_t;
/*
* an srtp_stream_ctx_t can contain an ekt_stream_ctx_t
*
* an ekt_stream_ctx_t structure holds all of the EKT information for
* a specific SRTP stream
*/
typedef struct ekt_stream_ctx_t {
ekt_data_t *data;
uint16_t isn; /* initial sequence number */
uint8_t encrypted_master_key[SRTP_MAX_KEY_LEN];
} ekt_stream_ctx_t;
err_status_t
ekt_alloc(ekt_stream_t *stream_data, ekt_policy_t policy);
err_status_t
ekt_stream_init(ekt_stream_t e,
ekt_spi_t spi,
void *ekt_key,
unsigned ekt_cipher_type);
err_status_t
ekt_stream_init_from_policy(ekt_stream_t e, ekt_policy_t p);
err_status_t
srtp_stream_init_from_ekt(srtp_stream_t stream,
const void *srtcp_hdr,
unsigned pkt_octet_len);
void
ekt_write_data(ekt_stream_t ekt,
uint8_t *base_tag,
unsigned base_tag_len,
int *packet_len,
xtd_seq_num_t pkt_index);
/*
* We handle EKT by performing some additional steps before
* authentication (copying the auth tag into a temporary location,
* zeroizing the "base tag" field in the packet)
*
* With EKT, the tag_len parameter is actually the base tag
* length
*/
err_status_t
ekt_tag_verification_preproces(uint8_t *pkt_tag,
uint8_t *pkt_tag_copy,
unsigned tag_len);
err_status_t
ekt_tag_verification_postproces(uint8_t *pkt_tag,
uint8_t *pkt_tag_copy,
unsigned tag_len);
/*
* @brief EKT pre-processing for srtcp tag generation
*
* This function does the pre-processing of the SRTCP authentication
* tag format. When EKT is used, it consists of writing the Encrypted
* Master Key, the SRTP ROC, the Initial Sequence Number, and SPI
* fields. The Base Authentication Tag field is set to the all-zero
* value
*
* When EKT is not used, this function is a no-op.
*
*/
err_status_t
srtp_stream_srtcp_auth_tag_generation_preprocess(const srtp_stream_t *s,
uint8_t *pkt_tag,
unsigned pkt_octet_len);
/* it's not clear that a tag_generation_postprocess function is needed */
err_status_t
srtcp_auth_tag_generation_postprocess(void);
#ifdef __cplusplus
}
#endif
#endif /* EKT_H */
libs/srtp/include/getopt_s.h
+60
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@@ -0,0 +1,60 @@
/*
* getopt.h
*
* interface to a minimal implementation of the getopt() function,
* written so that test applications that use that function can run on
* non-POSIX platforms
*
*/
/*
*
* Copyright (c) 2001-2006 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT HOLDERS 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.
*
*/
#ifndef GETOPT_S_H
#define GETOPT_S_H
/*
* getopt_s(), optarg_s, and optind_s are small, locally defined
* versions of the POSIX standard getopt() interface.
*/
int
getopt_s(int argc, char * const argv[], const char *optstring);
extern char *optarg_s; /* defined in getopt.c */
extern int optind_s; /* defined in getopt.c */
#endif /* GETOPT_S_H */
libs/srtp/include/rtp.h
+53 -39
View File
@@ -16,7 +16,7 @@
/*
*
* Copyright (c) 2001-2005, Cisco Systems, Inc.
* Copyright (c) 2001-2006, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -54,72 +54,86 @@
#ifndef RTP_H
#define RTP_H
#include "srtp.h"
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#elif defined HAVE_WINSOCK2_H
# include <winsock2.h>
#endif
#define rtp_header_len 12
#include "srtp.h"
typedef srtp_hdr_t rtp_hdr_t;
typedef struct rtp_sender_ctx_t *rtp_sender_t;
#define RTP_MAX_BUF_LEN 16384
typedef struct {
srtp_hdr_t header;
char body[RTP_MAX_BUF_LEN];
} rtp_msg_t;
typedef struct {
rtp_msg_t message;
int socket;
srtp_ctx_t *srtp_ctx;
struct sockaddr_in addr; /* reciever's address */
} rtp_sender_t;
typedef struct {
rtp_msg_t message;
int socket;
srtp_ctx_t *srtp_ctx;
struct sockaddr_in addr; /* receiver's address */
} rtp_receiver_t;
ssize_t
rtp_sendto(rtp_sender_t *sender, const void* msg, int len);
ssize_t
rtp_recvfrom(rtp_receiver_t *receiver, void *msg, int *len);
typedef struct rtp_receiver_ctx_t *rtp_receiver_t;
int
rtp_receiver_init(rtp_receiver_t *rcvr, int socket,
struct sockaddr_in addr, uint32_t ssrc);
rtp_sendto(rtp_sender_t sender, const void* msg, int len);
int
rtp_sender_init(rtp_sender_t *sender, int socket,
struct sockaddr_in addr, uint32_t ssrc);
rtp_recvfrom(rtp_receiver_t receiver, void *msg, int *len);
int
rtp_receiver_init(rtp_receiver_t rcvr, int sock,
struct sockaddr_in addr, unsigned int ssrc);
int
rtp_sender_init(rtp_sender_t sender, int sock,
struct sockaddr_in addr, unsigned int ssrc);
/*
* srtp_sender_init(...) initializes an rtp_sender_t
*
*/
int
srtp_sender_init(rtp_sender_t *rtp_ctx, /* structure to be init'ed */
srtp_sender_init(rtp_sender_t rtp_ctx, /* structure to be init'ed */
struct sockaddr_in name, /* socket name */
sec_serv_t security_services, /* sec. servs. to be used */
unsigned char *input_key /* master key/salt in hex */
);
int
srtp_receiver_init(rtp_receiver_t *rtp_ctx, /* structure to be init'ed */
srtp_receiver_init(rtp_receiver_t rtp_ctx, /* structure to be init'ed */
struct sockaddr_in name, /* socket name */
sec_serv_t security_services, /* sec. servs. to be used */
unsigned char *input_key /* master key/salt in hex */
);
int
rtp_sender_init_srtp(rtp_sender_t sender, const srtp_policy_t *policy);
int
rtp_sender_deinit_srtp(rtp_sender_t sender);
int
rtp_receiver_init_srtp(rtp_receiver_t sender, const srtp_policy_t *policy);
int
rtp_receiver_deinit_srtp(rtp_receiver_t sender);
rtp_sender_t
rtp_sender_alloc(void);
void
rtp_sender_dealloc(rtp_sender_t rtp_ctx);
rtp_receiver_t
rtp_receiver_alloc(void);
void
rtp_receiver_dealloc(rtp_receiver_t rtp_ctx);
/*
* RTP_HEADER_LEN indicates the size of an RTP header
*/
#define RTP_HEADER_LEN 12
/*
* RTP_MAX_BUF_LEN defines the largest RTP packet in the rtp.c implementation
*/
#define RTP_MAX_BUF_LEN 16384
#endif /* RTP_H */
libs/srtp/include/rtp_priv.h
+74
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@@ -0,0 +1,74 @@
/*
* rtp_priv.h
*
* private, internal header file for RTP
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2006 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT HOLDERS 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.
*
*/
#ifndef RTP_PRIV_H
#define RTP_PRIV_H
#include "srtp_priv.h"
#include "rtp.h"
typedef srtp_hdr_t rtp_hdr_t;
typedef struct {
srtp_hdr_t header;
char body[RTP_MAX_BUF_LEN];
} rtp_msg_t;
typedef struct rtp_sender_ctx_t {
rtp_msg_t message;
int socket;
srtp_ctx_t *srtp_ctx;
struct sockaddr_in addr; /* reciever's address */
} rtp_sender_ctx_t;
typedef struct rtp_receiver_ctx_t {
rtp_msg_t message;
int socket;
srtp_ctx_t *srtp_ctx;
struct sockaddr_in addr; /* receiver's address */
} rtp_receiver_ctx_t;
#endif /* RTP_PRIV_H */
libs/srtp/include/srtp.h
+212 -211
View File
@@ -8,7 +8,7 @@
*/
/*
*
* Copyright (c) 2001-2005, Cisco Systems, Inc.
* Copyright (c) 2001-2006, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -50,14 +50,7 @@
extern "C" {
#endif
#ifdef _MSC_VER
#pragma warning(disable:4214)
#endif
#include "crypto_kernel.h"
#include "rdbx.h"
#include "rdb.h"
#include "integers.h"
#include "crypto_kernel.h"
/**
* @defgroup SRTP Secure RTP
@@ -171,10 +164,22 @@ typedef enum {
typedef struct {
ssrc_type_t type; /**< The type of this particular SSRC */
uint32_t value; /**< The value of this SSRC, if it is not a wildcard */
unsigned int value; /**< The value of this SSRC, if it is not a wildcard */
} ssrc_t;
/**
* @brief points to an EKT policy
*/
typedef struct ekt_policy_ctx_t *ekt_policy_t;
/**
* @brief points to EKT stream data
*/
typedef struct ekt_stream_ctx_t *ekt_stream_t;
/**
* @brief represents the policy for an SRTP session.
*
@@ -210,8 +215,18 @@ typedef struct srtp_policy_t {
*/
crypto_policy_t rtp; /**< SRTP crypto policy. */
crypto_policy_t rtcp; /**< SRTCP crypto policy. */
uint8_t *key; /**< Pointer to the SRTP master key for
unsigned char *key; /**< Pointer to the SRTP master key for
* this stream. */
ekt_policy_t ekt; /**< Pointer to the EKT policy structure
* for this stream (if any) */
unsigned long window_size; /**< The window size to use for replay
* protection. */
int allow_repeat_tx; /**< Whether retransmissions of
* packets with the same sequence number
* are allowed. (Note that such repeated
* transmissions must have the same RTP
* payload, or a severe security weakness
* is introduced!) */
struct srtp_policy_t *next; /**< Pointer to next stream policy. */
} srtp_policy_t;
@@ -260,6 +275,15 @@ typedef struct srtp_stream_ctx_t *srtp_stream_t;
err_status_t
srtp_init(void);
/**
* @brief srtp_shutdown() de-initializes the srtp library.
*
* @warning No srtp functions may be called after calling this function.
*/
err_status_t
srtp_shutdown(void);
/**
* @brief srtp_protect() is the Secure RTP sender-side packet processing
* function.
@@ -413,14 +437,13 @@ srtp_add_stream(srtp_t session,
*/
err_status_t
srtp_remove_stream(srtp_t session, uint32_t ssrc);
srtp_remove_stream(srtp_t session, unsigned int ssrc);
/**
* @brief crypto_policy_set_rtp_default() sets a crypto policy
* structure to the SRTP default policy for RTP protection.
*
* @param p is a pointer to the policy strucutre to be set to the
* default policy.
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_rtp_default(&p) sets the
* crypto_policy_t at location p to the SRTP default policy for RTP
@@ -442,8 +465,7 @@ crypto_policy_set_rtp_default(crypto_policy_t *p);
* @brief crypto_policy_set_rtcp_default() sets a crypto policy
* structure to the SRTP default policy for RTCP protection.
*
* @param p is a pointer to the policy strucutre to be set to the
* default policy.
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_rtcp_default(&p) sets the
* crypto_policy_t at location p to the SRTP default policy for RTCP
@@ -465,13 +487,12 @@ crypto_policy_set_rtcp_default(crypto_policy_t *p);
* @brief crypto_policy_set_aes_cm_128_hmac_sha1_80() sets a crypto
* policy structure to the SRTP default policy for RTP protection.
*
* @param p is a pointer to the policy strucutre to be set to the
* default policy.
* @param p is a pointer to the policy structure to be set
*
* The function crypto_policy_set_aes_cm_128_hmac_sha1_80() is a
* synonym for crypto_policy_set_rtp_default(). It conforms to the
* naming convention used in
* http://www.ietf.org/internet-drafts/draft-ietf-mmusic-sdescriptions-12.txt
* naming convention used in RFC 4568 (SDP Security Descriptions for
* Media Streams).
*
* @return void.
*
@@ -484,13 +505,12 @@ crypto_policy_set_rtcp_default(crypto_policy_t *p);
* @brief crypto_policy_set_aes_cm_128_hmac_sha1_32() sets a crypto
* policy structure to a short-authentication tag policy
*
* @param p is a pointer to the policy strucutre to be set to the
* default policy.
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_aes_cm_128_hmac_sha1_32(&p)
* sets the crypto_policy_t at location p to use policy
* AES_CM_128_HMAC_SHA1_32 as defined in
* draft-ietf-mmusic-sdescriptions-12.txt. This policy uses AES-128
* AES_CM_128_HMAC_SHA1_32 as defined in RFC 4568.
* This policy uses AES-128
* Counter Mode encryption and HMAC-SHA1 authentication, with an
* authentication tag that is only 32 bits long. This length is
* considered adequate only for protecting audio and video media that
@@ -521,8 +541,7 @@ crypto_policy_set_aes_cm_128_hmac_sha1_32(crypto_policy_t *p);
* @brief crypto_policy_set_aes_cm_128_null_auth() sets a crypto
* policy structure to an encryption-only policy
*
* @param p is a pointer to the policy strucutre to be set to the
* default policy.
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_aes_cm_128_null_auth(&p) sets
* the crypto_policy_t at location p to use the SRTP default cipher
@@ -552,8 +571,7 @@ crypto_policy_set_aes_cm_128_null_auth(crypto_policy_t *p);
* @brief crypto_policy_set_null_cipher_hmac_sha1_80() sets a crypto
* policy structure to an authentication-only policy
*
* @param p is a pointer to the policy strucutre to be set to the
* default policy.
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_null_cipher_hmac_sha1_80(&p)
* sets the crypto_policy_t at location p to use HMAC-SHA1 with an 80
@@ -577,6 +595,70 @@ crypto_policy_set_aes_cm_128_null_auth(crypto_policy_t *p);
void
crypto_policy_set_null_cipher_hmac_sha1_80(crypto_policy_t *p);
/**
* @brief crypto_policy_set_aes_cm_256_hmac_sha1_80() sets a crypto
* policy structure to a encryption and authentication policy using AES-256
* for RTP protection.
*
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_aes_cm_256_hmac_sha1_80(&p)
* sets the crypto_policy_t at location p to use policy
* AES_CM_256_HMAC_SHA1_80 as defined in
* draft-ietf-avt-srtp-big-aes-03.txt. This policy uses AES-256
* Counter Mode encryption and HMAC-SHA1 authentication, with an 80 bit
* authentication tag.
*
* This function is a convenience that helps to avoid dealing directly
* with the policy data structure. You are encouraged to initialize
* policy elements with this function call. Doing so may allow your
* code to be forward compatible with later versions of libSRTP that
* include more elements in the crypto_policy_t datatype.
*
* @return void.
*
*/
void crypto_policy_set_aes_cm_256_hmac_sha1_80(crypto_policy_t *p);
/**
* @brief crypto_policy_set_aes_cm_256_hmac_sha1_32() sets a crypto
* policy structure to a short-authentication tag policy using AES-256
* encryption.
*
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_aes_cm_256_hmac_sha1_32(&p)
* sets the crypto_policy_t at location p to use policy
* AES_CM_256_HMAC_SHA1_32 as defined in
* draft-ietf-avt-srtp-big-aes-03.txt. This policy uses AES-256
* Counter Mode encryption and HMAC-SHA1 authentication, with an
* authentication tag that is only 32 bits long. This length is
* considered adequate only for protecting audio and video media that
* use a stateless playback function. See Section 7.5 of RFC 3711
* (http://www.ietf.org/rfc/rfc3711.txt).
*
* This function is a convenience that helps to avoid dealing directly
* with the policy data structure. You are encouraged to initialize
* policy elements with this function call. Doing so may allow your
* code to be forward compatible with later versions of libSRTP that
* include more elements in the crypto_policy_t datatype.
*
* @warning This crypto policy is intended for use in SRTP, but not in
* SRTCP. It is recommended that a policy that uses longer
* authentication tags be used for SRTCP. See Section 7.5 of RFC 3711
* (http://www.ietf.org/rfc/rfc3711.txt).
*
* @return void.
*
*/
void
crypto_policy_set_aes_cm_256_hmac_sha1_32(crypto_policy_t *p);
/**
* @brief srtp_dealloc() deallocates storage for an SRTP session
* context.
@@ -597,70 +679,114 @@ err_status_t
srtp_dealloc(srtp_t s);
/*
* @brief identifies a particular SRTP profile
*
* An srtp_profile_t enumeration is used to identify a particular SRTP
* profile (that is, a set of algorithms and parameters). These
* profiles are defined in the DTLS-SRTP draft.
*/
typedef enum {
srtp_profile_reserved = 0,
srtp_profile_aes128_cm_sha1_80 = 1,
srtp_profile_aes128_cm_sha1_32 = 2,
srtp_profile_aes256_cm_sha1_80 = 3,
srtp_profile_aes256_cm_sha1_32 = 4,
srtp_profile_null_sha1_80 = 5,
srtp_profile_null_sha1_32 = 6,
} srtp_profile_t;
/**
* @brief crypto_policy_set_from_profile_for_rtp() sets a crypto policy
* structure to the appropriate value for RTP based on an srtp_profile_t
*
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_rtp_default(&policy, profile)
* sets the crypto_policy_t at location policy to the policy for RTP
* protection, as defined by the srtp_profile_t profile.
*
* This function is a convenience that helps to avoid dealing directly
* with the policy data structure. You are encouraged to initialize
* policy elements with this function call. Doing so may allow your
* code to be forward compatible with later versions of libSRTP that
* include more elements in the crypto_policy_t datatype.
*
* @return values
* - err_status_ok no problems were encountered
* - err_status_bad_param the profile is not supported
*
*/
err_status_t
crypto_policy_set_from_profile_for_rtp(crypto_policy_t *policy,
srtp_profile_t profile);
/**
* @brief crypto_policy_set_from_profile_for_rtcp() sets a crypto policy
* structure to the appropriate value for RTCP based on an srtp_profile_t
*
* @param p is a pointer to the policy structure to be set
*
* The function call crypto_policy_set_rtcp_default(&policy, profile)
* sets the crypto_policy_t at location policy to the policy for RTCP
* protection, as defined by the srtp_profile_t profile.
*
* This function is a convenience that helps to avoid dealing directly
* with the policy data structure. You are encouraged to initialize
* policy elements with this function call. Doing so may allow your
* code to be forward compatible with later versions of libSRTP that
* include more elements in the crypto_policy_t datatype.
*
* @return values
* - err_status_ok no problems were encountered
* - err_status_bad_param the profile is not supported
*
*/
err_status_t
crypto_policy_set_from_profile_for_rtcp(crypto_policy_t *policy,
srtp_profile_t profile);
/**
* @brief returns the master key length for a given SRTP profile
*/
unsigned int
srtp_profile_get_master_key_length(srtp_profile_t profile);
/**
* @brief returns the master salt length for a given SRTP profile
*/
unsigned int
srtp_profile_get_master_salt_length(srtp_profile_t profile);
/**
* @brief appends the salt to the key
*
* The function call append_salt_to_key(k, klen, s, slen)
* copies the string s to the location at klen bytes following
* the location k.
*
* @warning There must be at least bytes_in_salt + bytes_in_key bytes
* available at the location pointed to by key.
*
*/
void
append_salt_to_key(unsigned char *key, unsigned int bytes_in_key,
unsigned char *salt, unsigned int bytes_in_salt);
/**
* @}
*/
/*
* the following declarations are libSRTP internal functions
*/
/*
* srtp_get_stream(ssrc) returns a pointer to the stream corresponding
* to ssrc, or NULL if no stream exists for that ssrc
*/
srtp_stream_t
srtp_get_stream(srtp_t srtp, uint32_t ssrc);
/*
* libsrtp internal datatypes
*/
typedef enum direction_t {
dir_unknown = 0,
dir_srtp_sender = 1,
dir_srtp_receiver = 2
} direction_t;
/*
* an srtp_stream_t has its own SSRC, encryption key, authentication
* key, sequence number, and replay database
*
* note that the keys might not actually be unique, in which case the
* cipher_t and auth_t pointers will point to the same structures
*/
typedef struct srtp_stream_ctx_t {
uint32_t ssrc;
cipher_t *rtp_cipher;
auth_t *rtp_auth;
rdbx_t rtp_rdbx;
sec_serv_t rtp_services;
cipher_t *rtcp_cipher;
auth_t *rtcp_auth;
rdb_t rtcp_rdb;
sec_serv_t rtcp_services;
key_limit_ctx_t *limit;
direction_t direction;
struct srtp_stream_ctx_t *next; /* linked list of streams */
} srtp_stream_ctx_t;
/*
* an srtp_ctx_t holds a stream list and a service description
*/
typedef struct srtp_ctx_t {
srtp_stream_ctx_t *stream_list; /* linked list of streams */
srtp_stream_ctx_t *stream_template; /* act as template for other streams */
} srtp_ctx_t;
/**
* @defgroup SRTCP Secure RTCP
@@ -867,137 +993,12 @@ srtp_install_event_handler(srtp_event_handler_func_t func);
/**
* @}
*/
/*
* srtp_handle_event(srtp, srtm, evnt) calls the event handling
* function, if there is one.
*
* This macro is not included in the documentation as it is
* an internal-only function.
*/
#define srtp_handle_event(srtp, strm, evnt) \
if(srtp_event_handler) { \
srtp_event_data_t data; \
data.session = srtp; \
data.stream = strm; \
data.event = evnt; \
srtp_event_handler(&data); \
}
/*
* an srtp_hdr_t represents the srtp header
*
* in this implementation, an srtp_hdr_t is assumed to be 32-bit aligned
*
* (note that this definition follows that of RFC 1889 Appendix A, but
* is not identical)
*/
#ifdef _MSC_VER
#pragma pack(push, r1, 1)
#endif
#ifndef WORDS_BIGENDIAN
typedef struct {
unsigned cc:4; /* CSRC count */
unsigned x:1; /* header extension flag */
unsigned p:1; /* padding flag */
unsigned version:2; /* protocol version */
unsigned pt:7; /* payload type */
unsigned m:1; /* marker bit */
unsigned seq:16; /* sequence number */
unsigned ts:32; /* timestamp */
unsigned ssrc:32; /* synchronization source */
} srtp_hdr_t;
#else /* BIG_ENDIAN */
typedef struct {
unsigned version:2; /* protocol version */
unsigned p:1; /* padding flag */
unsigned x:1; /* header extension flag */
unsigned cc:4; /* CSRC count */
unsigned m:1; /* marker bit */
unsigned pt:7; /* payload type */
unsigned seq:16; /* sequence number */
unsigned ts:32; /* timestamp */
unsigned ssrc:32; /* synchronization source */
} srtp_hdr_t;
#endif
typedef struct {
uint16_t profile_specific; /* profile-specific info */
uint16_t length; /* number of 32-bit words in extension */
} srtp_hdr_xtnd_t;
/*
* srtcp_hdr_t represents a secure rtcp header
*
* in this implementation, an srtcp header is assumed to be 32-bit
* alinged
*/
#ifndef WORDS_BIGENDIAN
typedef struct {
unsigned rc:5; /* reception report count */
unsigned p:1; /* padding flag */
unsigned version:2; /* protocol version */
unsigned pt:8; /* payload type */
unsigned len:16; /* length */
unsigned ssrc:32; /* synchronization source */
} srtcp_hdr_t;
typedef struct {
unsigned int index:31; /* srtcp packet index in network order! */
unsigned int e:1; /* encrypted? 1=yes */
/* optional mikey/etc go here */
/* and then the variable-length auth tag */
} srtcp_trailer_t;
#else /* BIG_ENDIAN */
typedef struct {
unsigned version:2; /* protocol version */
unsigned p:1; /* padding flag */
unsigned rc:5; /* reception report count */
unsigned pt:8; /* payload type */
unsigned len:16; /* length */
unsigned ssrc:32; /* synchronization source */
} srtcp_hdr_t;
typedef struct {
unsigned int version:2; /* protocol version */
unsigned int p:1; /* padding flag */
unsigned int count:5; /* varies by packet type */
unsigned int pt:8; /* payload type */
unsigned length:16; /* len of uint32s of packet less header */
} rtcp_common_t;
typedef struct {
unsigned int e:1; /* encrypted? 1=yes */
unsigned int index:31; /* srtcp packet index */
/* optional mikey/etc go here */
/* and then the variable-length auth tag */
} srtcp_trailer_t;
#endif
/* in host order, so outside the #if */
#define SRTCP_E_BIT 0x80000000
/* for byte-access */
#define SRTCP_E_BYTE_BIT 0x80
#define SRTCP_INDEX_MASK 0x7fffffff
#ifdef _MSC_VER
#pragma pack(pop, r1)
#endif
#ifdef __cplusplus
}
#endif
libs/srtp/include/srtp_priv.h
+256
View File
@@ -0,0 +1,256 @@
/*
* srtp_priv.h
*
* private internal data structures and functions for libSRTP
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2006 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT HOLDERS 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.
*
*/
#ifndef SRTP_PRIV_H
#define SRTP_PRIV_H
#include "srtp.h"
#include "rdbx.h"
#include "rdb.h"
#include "integers.h"
/*
* an srtp_hdr_t represents the srtp header
*
* in this implementation, an srtp_hdr_t is assumed to be 32-bit aligned
*
* (note that this definition follows that of RFC 1889 Appendix A, but
* is not identical)
*/
#ifndef WORDS_BIGENDIAN
/*
* srtp_hdr_t represents an RTP or SRTP header. The bit-fields in
* this structure should be declared "unsigned int" instead of
* "unsigned char", but doing so causes the MS compiler to not
* fully pack the bit fields.
*/
typedef struct {
unsigned cc:4; /* CSRC count */
unsigned x:1; /* header extension flag */
unsigned p:1; /* padding flag */
unsigned version:2; /* protocol version */
unsigned pt:7; /* payload type */
unsigned m:1; /* marker bit */
unsigned seq:16; /* sequence number */
unsigned ts:32; /* timestamp */
unsigned ssrc:32; /* synchronization source */
} srtp_hdr_t;
#else /* BIG_ENDIAN */
typedef struct {
unsigned char version:2; /* protocol version */
unsigned char p:1; /* padding flag */
unsigned char x:1; /* header extension flag */
unsigned char cc:4; /* CSRC count */
unsigned char m:1; /* marker bit */
unsigned pt:7; /* payload type */
unsigned seq:16; /* sequence number */
unsigned ts:32; /* timestamp */
unsigned ssrc:32; /* synchronization source */
} srtp_hdr_t;
#endif
typedef struct {
uint16_t profile_specific; /* profile-specific info */
uint16_t length; /* number of 32-bit words in extension */
} srtp_hdr_xtnd_t;
/*
* srtcp_hdr_t represents a secure rtcp header
*
* in this implementation, an srtcp header is assumed to be 32-bit
* alinged
*/
#ifndef WORDS_BIGENDIAN
typedef struct {
unsigned rc:5; /* reception report count */
unsigned p:1; /* padding flag */
unsigned version:2; /* protocol version */
unsigned pt:8; /* payload type */
unsigned len:16; /* length */
unsigned ssrc:32; /* synchronization source */
} srtcp_hdr_t;
typedef struct {
unsigned int index:31; /* srtcp packet index in network order! */
unsigned int e:1; /* encrypted? 1=yes */
/* optional mikey/etc go here */
/* and then the variable-length auth tag */
} srtcp_trailer_t;
#else /* BIG_ENDIAN */
typedef struct {
unsigned char version:2; /* protocol version */
unsigned char p:1; /* padding flag */
unsigned char rc:5; /* reception report count */
unsigned char pt:8; /* payload type */
uint16_t len; /* length */
uint32_t ssrc; /* synchronization source */
} srtcp_hdr_t;
typedef struct {
unsigned int version:2; /* protocol version */
unsigned int p:1; /* padding flag */
unsigned int count:5; /* varies by packet type */
unsigned int pt:8; /* payload type */
uint16_t length; /* len of uint32s of packet less header */
} rtcp_common_t;
typedef struct {
unsigned int e:1; /* encrypted? 1=yes */
unsigned int index:31; /* srtcp packet index */
/* optional mikey/etc go here */
/* and then the variable-length auth tag */
} srtcp_trailer_t;
#endif
/*
* the following declarations are libSRTP internal functions
*/
/*
* srtp_get_stream(ssrc) returns a pointer to the stream corresponding
* to ssrc, or NULL if no stream exists for that ssrc
*/
srtp_stream_t
srtp_get_stream(srtp_t srtp, uint32_t ssrc);
/*
* srtp_stream_init_keys(s, k) (re)initializes the srtp_stream_t s by
* deriving all of the needed keys using the KDF and the key k.
*/
err_status_t
srtp_stream_init_keys(srtp_stream_t srtp, const void *key);
/*
* srtp_stream_init(s, p) initializes the srtp_stream_t s to
* use the policy at the location p
*/
err_status_t
srtp_stream_init(srtp_stream_t srtp,
const srtp_policy_t *p);
/*
* libsrtp internal datatypes
*/
typedef enum direction_t {
dir_unknown = 0,
dir_srtp_sender = 1,
dir_srtp_receiver = 2
} direction_t;
/*
* an srtp_stream_t has its own SSRC, encryption key, authentication
* key, sequence number, and replay database
*
* note that the keys might not actually be unique, in which case the
* cipher_t and auth_t pointers will point to the same structures
*/
typedef struct srtp_stream_ctx_t {
uint32_t ssrc;
cipher_t *rtp_cipher;
auth_t *rtp_auth;
rdbx_t rtp_rdbx;
sec_serv_t rtp_services;
cipher_t *rtcp_cipher;
auth_t *rtcp_auth;
rdb_t rtcp_rdb;
sec_serv_t rtcp_services;
key_limit_ctx_t *limit;
direction_t direction;
int allow_repeat_tx;
ekt_stream_t ekt;
struct srtp_stream_ctx_t *next; /* linked list of streams */
} srtp_stream_ctx_t;
/*
* an srtp_ctx_t holds a stream list and a service description
*/
typedef struct srtp_ctx_t {
srtp_stream_ctx_t *stream_list; /* linked list of streams */
srtp_stream_ctx_t *stream_template; /* act as template for other streams */
} srtp_ctx_t;
/*
* srtp_handle_event(srtp, srtm, evnt) calls the event handling
* function, if there is one.
*
* This macro is not included in the documentation as it is
* an internal-only function.
*/
#define srtp_handle_event(srtp, strm, evnt) \
if(srtp_event_handler) { \
srtp_event_data_t data; \
data.session = srtp; \
data.stream = strm; \
data.event = evnt; \
srtp_event_handler(&data); \
}
#endif /* SRTP_PRIV_H */
libs/srtp/include/ut_sim.h
+1 -1
View File
@@ -10,7 +10,7 @@
/*
*
* Copyright (c) 2001-2005, Cisco Systems, Inc.
* Copyright (c) 2001-2006, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without