91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* sha1.h
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*
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* interface to the Secure Hash Algorithm v.1 (SHA-1), specified in
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* FIPS 180-1
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*
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* David A. McGrew
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* Cisco Systems, Inc.
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*/
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/*
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*
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* Copyright (c) 2001-2017, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef SHA1_H
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#define SHA1_H
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "err.h"
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#include "datatypes.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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uint32_t H[5]; /* state vector */
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uint32_t M[16]; /* message buffer */
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int octets_in_buffer; /* octets of message in buffer */
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uint32_t num_bits_in_msg; /* total number of bits in message */
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} srtp_sha1_ctx_t;
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/*
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* srtp_sha1_init(&ctx) initializes the SHA1 context ctx
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*
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* srtp_sha1_update(&ctx, msg, len) hashes the len octets starting at msg
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* into the SHA1 context
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*
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* srtp_sha1_final(&ctx, output) performs the final processing of the SHA1
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* context and writes the result to the 20 octets at output
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*
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*/
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void srtp_sha1_init(srtp_sha1_ctx_t *ctx);
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void srtp_sha1_update(srtp_sha1_ctx_t *ctx,
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const uint8_t *M,
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int octets_in_msg);
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void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t output[5]);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SHA1_H */
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