/usr/include/srtp/hmac.h is in libsrtp0-dev 1.4.4+20100615~dfsg-1build1.
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* hmac.h
*
* interface to hmac auth_type_t
*
* 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 HMAC_H
#define HMAC_H
#include "auth.h"
#include "sha1.h"
typedef struct {
uint8_t opad[64];
sha1_ctx_t ctx;
sha1_ctx_t init_ctx;
} hmac_ctx_t;
err_status_t
hmac_alloc(auth_t **a, int key_len, int out_len);
err_status_t
hmac_dealloc(auth_t *a);
err_status_t
hmac_init(hmac_ctx_t *state, const uint8_t *key, int key_len);
err_status_t
hmac_start(hmac_ctx_t *state);
err_status_t
hmac_update(hmac_ctx_t *state, const uint8_t *message, int msg_octets);
err_status_t
hmac_compute(hmac_ctx_t *state, const void *message,
int msg_octets, int tag_len, uint8_t *result);
#endif /* HMAC_H */
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