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/*
* Secure RTP with libgcrypt
* Copyright (C) 2007 Rémi Denis-Courmont
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
****************************************************************************/
#ifndef LIBVLC_SRTP_H
# define LIBVLC_SRTP_H 1
#include <stdint.h>
typedef struct srtp_session_t srtp_session_t;
enum
{
SRTP_UNENCRYPTED=0x1, //< do not encrypt SRTP packets
SRTCP_UNENCRYPTED=0x2, //< do not encrypt SRTCP packets
SRTP_UNAUTHENTICATED=0x4, //< authenticate only SRTCP packets
SRTP_RCC_MODE1=0x10, //< use Roll-over-Counter Carry mode 1
SRTP_RCC_MODE2=0x20, //< use Roll-over-Counter Carry mode 2
SRTP_RCC_MODE3=0x30, //< use Roll-over-Counter Carry mode 3 (insecure)
SRTP_FLAGS_MASK=0x37 //< mask for valid flags
};
/** SRTP encryption algorithms (ciphers); same values as MIKEY */
enum
{
SRTP_ENCR_NULL=0, //< no encryption
SRTP_ENCR_AES_CM=1, //< AES counter mode
SRTP_ENCR_AES_F8=2, //< AES F8 mode (not implemented)
};
/** SRTP authenticaton algorithms; same values as MIKEY */
enum
{
SRTP_AUTH_NULL=0, //< no authentication code
SRTP_AUTH_HMAC_SHA1=1, //< HMAC-SHA1
};
/** SRTP pseudo random function; same values as MIKEY */
enum
{
SRTP_PRF_AES_CM=0, //< AES counter mode
};
# ifdef __cplusplus
extern "C" {
# endif
srtp_session_t *srtp_create (int encr, int auth, unsigned tag_len, int prf,
unsigned flags);
void srtp_destroy (srtp_session_t *s);
int srtp_setkey (srtp_session_t *s, const void *key, size_t keylen,
const void *salt, size_t saltlen);
int srtp_setkeystring (srtp_session_t *s, const char *key, const char *salt);
void srtp_setrcc_rate (srtp_session_t *s, uint16_t rate);
int srtp_send (srtp_session_t *s, uint8_t *buf, size_t *lenp, size_t maxsize);
int srtp_recv (srtp_session_t *s, uint8_t *buf, size_t *lenp);
int srtcp_send (srtp_session_t *s, uint8_t *buf, size_t *lenp, size_t maxsiz);
int srtcp_recv (srtp_session_t *s, uint8_t *buf, size_t *lenp);
# ifdef __cplusplus
}
# endif
#endif
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