/* * sha1.h * * interface to the Secure Hash Algorithm v.1 (SHA-1), specified in * FIPS 180-1 * * David A. McGrew * Cisco Systems, Inc.
*/
/* * * Copyright (c) 2001-2017, 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 SHA1_H #define SHA1_H
#ifdef HAVE_CONFIG_H #include <config.h> #endif
#include"err.h" #include"datatypes.h"
#ifdef __cplusplus extern"C" { #endif
typedefstruct {
uint32_t H[5]; /* state vector */
uint32_t M[16]; /* message buffer */ int octets_in_buffer; /* octets of message in buffer */
uint32_t num_bits_in_msg; /* total number of bits in message */
} srtp_sha1_ctx_t;
/* * srtp_sha1_init(&ctx) initializes the SHA1 context ctx * * srtp_sha1_update(&ctx, msg, len) hashes the len octets starting at msg * into the SHA1 context * * srtp_sha1_final(&ctx, output) performs the final processing of the SHA1 * context and writes the result to the 20 octets at output *
*/ void srtp_sha1_init(srtp_sha1_ctx_t *ctx);
void srtp_sha1_update(srtp_sha1_ctx_t *ctx, const uint8_t *M, int octets_in_msg);
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