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Add RFC5764 - SRTP key generation during DTLS handshake

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Signed-off-by: Johan Pascal <johan.pascal@belledonne-communications.com>
This commit is contained in:
Johan Pascal 2015-12-03 21:56:45 +01:00
parent 935b4f96f9
commit b62bb51aff
5 changed files with 449 additions and 0 deletions
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59
include/mbedtls/ssl.h
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@ -393,6 +393,8 @@
#define MBEDTLS_TLS_EXT_SIG_ALG 13
#define MBEDTLS_TLS_EXT_USE_SRTP 14
#define MBEDTLS_TLS_EXT_ALPN 16
#define MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC 22 /* 0x16 */
@ -409,6 +411,14 @@
#define MBEDTLS_TLS_EXT_RENEGOTIATION_INFO 0xFF01
/*
* use_srtp extension protection profiles values as defined in http://www.iana.org/assignments/srtp-protection/srtp-protection.xhtml
*/
#define MBEDTLS_SRTP_AES128_CM_HMAC_SHA1_80_IANA_VALUE 0x0001
#define MBEDTLS_SRTP_AES128_CM_HMAC_SHA1_32_IANA_VALUE 0x0002
#define MBEDTLS_SRTP_NULL_HMAC_SHA1_80_IANA_VALUE 0x0005
#define MBEDTLS_SRTP_NULL_HMAC_SHA1_32_IANA_VALUE 0x0006
/*
* Size defines
*/
@ -851,6 +861,19 @@ typedef void mbedtls_ssl_async_cancel_t( mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED &&
!MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
#if defined(MBEDTLS_SSL_DTLS_SRTP)
/*
* List of SRTP profiles for DTLS-SRTP
*/
enum mbedtls_DTLS_SRTP_protection_profiles {
MBEDTLS_SRTP_UNSET_PROFILE,
MBEDTLS_SRTP_AES128_CM_HMAC_SHA1_80,
MBEDTLS_SRTP_AES128_CM_HMAC_SHA1_32,
MBEDTLS_SRTP_NULL_HMAC_SHA1_80,
MBEDTLS_SRTP_NULL_HMAC_SHA1_32,
};
#endif /* MBEDTLS_SSL_DTLS_SRTP */
/*
* This structure is used for storing current session data.
*
@ -1298,6 +1321,17 @@ struct mbedtls_ssl_context
const char *alpn_chosen; /*!< negotiated protocol */
#endif /* MBEDTLS_SSL_ALPN */
#if defined(MBEDTLS_SSL_DTLS_SRTP)
/*
* use_srtp extension
*/
enum mbedtls_DTLS_SRTP_protection_profiles *dtls_srtp_profiles_list; /*!< ordered list of supported srtp profile */
size_t dtls_srtp_profiles_list_len; /*!< number of supported profiles */
enum mbedtls_DTLS_SRTP_protection_profiles chosen_dtls_srtp_profile; /*!< negotiated profil */
unsigned char *dtls_srtp_keys; /*<! master keys and master salt for SRTP generated during handshake */
size_t dtls_srtp_keys_len; /*<! length in bytes of master keys and master salt for SRTP generated during handshake */
#endif /* MBEDTLS_SSL_DTLS_SRTP */
/*
* Information for DTLS hello verify
*/
@ -3120,6 +3154,31 @@ int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config *conf, const char **prot
const char *mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_ALPN */
#if defined(MBEDTLS_SSL_DTLS_SRTP)
/**
* \brief Set the supported DTLS-SRTP protection profiles.
*
* \param ssl SSL context
* \param protos List of supported protection profiles,
* in decreasing preference order.
* \param profiles_number Number of supported profiles.
*
* \return 0 on success, or MBEDTLS_ERR_SSL_BAD_INPUT_DATA.
*/
int mbedtls_ssl_set_dtls_srtp_protection_profiles( mbedtls_ssl_context *ssl, const enum mbedtls_DTLS_SRTP_protection_profiles *profiles, size_t profiles_number);
/**
* \brief Get the negotiated DTLS-SRTP Protection Profile.
* This function should be called after the handshake is
* completed.
*
* \param ssl SSL context
*
* \return Protection Profile enum member, SRTP_UNSET_PROFILE if no protocol was negotiated.
*/
enum mbedtls_DTLS_SRTP_protection_profiles mbedtls_ssl_get_dtls_srtp_protection_profile( const mbedtls_ssl_context *ssl);
#endif /* MBEDTLS_SSL_DTLS_SRTP */
/**
* \brief Set the maximum supported version sent from the client side
* and/or accepted at the server side