45 #ifndef SRTP_CRYPTO_TYPES_H 46 #define SRTP_CRYPTO_TYPES_H 55 #define SRTP_NULL_CIPHER 0 64 #define SRTP_AES_ICM_128 1 73 #define SRTP_AES_ICM_192 4 82 #define SRTP_AES_ICM_256 5 90 #define SRTP_AES_GCM_128 6 98 #define SRTP_AES_GCM_256 7 106 #define SRTP_NULL_AUTH 0 114 #define SRTP_HMAC_SHA1 3