libSRTP 1.4.3 Overview and Reference Manual - SourceForge

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libSRTP 5.1 Secure RTP • struct srtp_policy_t represents the policy for an SRTP session. Defines • #define SRTP_MAX_TRAILER_LEN SRTP_MAX_TAG_LEN the maximum number of octets added by srtp_protect(). • #define crypto_policy_set_aes_cm_128_hmac_sha1_80(p) crypto_policy_set_rtp_default(p) crypto_policy_set_aes_cm_128_hmac_sha1_80() sets a crypto policy structure to the SRTP default policy for RTP protection. Typedefs • typedef crypto_policy_t crypto_policy_t crypto_policy_t describes a particular crypto policy that can be applied to an SRTP stream. • typedef srtp_policy_t srtp_policy_t represents the policy for an SRTP session. • typedef srtp_ctx_t ∗ srtp_t An srtp_t points to an SRTP session structure. • typedef srtp_stream_ctx_t ∗ srtp_stream_t An srtp_stream_t points to an SRTP stream structure. Enumerations • enum sec_serv_t { sec_serv_none = 0, sec_serv_conf = 1, sec_serv_auth = 2, sec_serv_conf_and_auth = 3 } sec_serv_t describes a set of security services. • enum ssrc_type_t { ssrc_undefined = 0, ssrc_specific = 1, ssrc_any_inbound = 2, ssrc_any_outbound = 3 } ssrc_type_t describes the type of an SSRC. 16
libSRTP Functions 5.1 Secure RTP • err_status_t srtp_init (void) srtp_init() initializes the srtp library. • err_status_t srtp_protect (srtp_t ctx, void ∗rtp_hdr, int ∗len_ptr) srtp_protect() is the Secure RTP sender-side packet processing function. • err_status_t srtp_unprotect (srtp_t ctx, void ∗srtp_hdr, int ∗len_ptr) srtp_unprotect() is the Secure RTP receiver-side packet processing function. • err_status_t srtp_create (srtp_t ∗session, const srtp_policy_t ∗policy) srtp_create() allocates and initializes an SRTP session. • err_status_t srtp_add_stream (srtp_t session, const srtp_policy_t ∗policy) srtp_add_stream() allocates and initializes an SRTP stream within a given SRTP session. • err_status_t srtp_remove_stream (srtp_t session, uint32_t ssrc) srtp_remove_stream() deallocates an SRTP stream. • void crypto_policy_set_rtp_default (crypto_policy_t ∗p) crypto_policy_set_rtp_default() sets a crypto policy structure to the SRTP default policy for RTP protection. • void crypto_policy_set_rtcp_default (crypto_policy_t ∗p) crypto_policy_set_rtcp_default() sets a crypto policy structure to the SRTP default policy for RTCP protection. • void crypto_policy_set_aes_cm_128_hmac_sha1_32 (crypto_policy_t ∗p) crypto_policy_set_aes_cm_128_hmac_sha1_32() sets a crypto policy structure to a short-authentication tag policy • void crypto_policy_set_aes_cm_128_null_auth (crypto_policy_t ∗p) crypto_policy_set_aes_cm_128_null_auth() sets a crypto policy structure to an encryption-only policy • void crypto_policy_set_null_cipher_hmac_sha1_80 (crypto_policy_t ∗p) crypto_policy_set_null_cipher_hmac_sha1_80() sets a crypto policy structure to an authentication-only policy • err_status_t srtp_dealloc (srtp_t s) srtp_dealloc() deallocates storage for an SRTP session context. • err_status_t crypto_policy_set_from_profile_for_rtp (crypto_policy_t ∗policy, srtp_profile_t profile) crypto_policy_set_from_profile_for_rtp() sets a crypto policy structure to the appropriate value for RTP based on an srtp_profile_t • err_status_t crypto_policy_set_from_profile_for_rtcp (crypto_policy_t ∗policy, srtp_profile_t profile) 17
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Page 5 and 6: libSRTP CONTENTS Contents 1 Introdu
Page 7: libSRTP CONTENTS 7.4 ssrc_t Struct
Page 10 and 11: libSRTP 1.2 Supported Features •
Page 12 and 13: 1.4 Applications libSRTP 1.4 Applic
Page 14 and 15: libSRTP 1.6 libSRTP Overview be dis
Page 16 and 17: libSRTP 1.8 ISMA Encryption Support
Page 18 and 19: libSRTP 2.1 libSRTP Modules 10
Page 20 and 21: libSRTP 3.1 libSRTP Directories 12
Page 22 and 23: libSRTP 4.1 libSRTP Data Structures
Page 26 and 27: libSRTP 5.1 Secure RTP crypto_polic
Page 28 and 29: libSRTP 5.1 Secure RTP An SRTP sess
Page 30 and 31: Returns: void. libSRTP 5.1 Secure R
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Page 36 and 37: 5.2 Secure RTCP libSRTP 5.2 Secure
Page 38 and 39: libSRTP 5.3 SRTP events and callbac
Page 40 and 41: libSRTP Enumerator: event_ssrc_coll
Page 42 and 43: 5.5 Cipher Types libSRTP 5.5 Cipher
Page 44 and 45: libSRTP 5.5 Cipher Types encryption
Page 46 and 47: libSRTP 5.6.2 Define Documentation
Page 48 and 49: libSRTP 5.7 Error Codes err_status_
Page 50 and 51: 5.9 Ciphers libSRTP 5.9 Ciphers A g
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Page 54 and 55: libSRTP 6.2 /Users/mcgrew/Code/july
Page 56 and 57: libSRTP 6.3 /Users/mcgrew/Code/july
Page 58 and 59: libSRTP 7.1.2 Field Documentation 7
Page 60 and 61: libSRTP 7.3 srtp_policy_t Struct Re
Page 62 and 63: libSRTP 7.4 ssrc_t Struct Reference
Page 64 and 65: libSRTP INDEX SRTP, 23 crypto_polic
Page 66: libSRTP INDEX SRTP, 25 srtp_dealloc

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