include/nettle/sha1.h

0001 /* sha1.h
0002
0003    The sha1 hash function.
0004
0005    Copyright (C) 2001, 2012 Niels Möller
0006
0007    This file is part of GNU Nettle.
0008
0009    GNU Nettle is free software: you can redistribute it and/or
0010    modify it under the terms of either:
0011
0012      * the GNU Lesser General Public License as published by the Free
0013        Software Foundation; either version 3 of the License, or (at your
0014        option) any later version.
0015
0016    or
0017
0018      * the GNU General Public License as published by the Free
0019        Software Foundation; either version 2 of the License, or (at your
0020        option) any later version.
0021
0022    or both in parallel, as here.
0023
0024    GNU Nettle is distributed in the hope that it will be useful,
0025    but WITHOUT ANY WARRANTY; without even the implied warranty of
0026    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0027    General Public License for more details.
0028
0029    You should have received copies of the GNU General Public License and
0030    the GNU Lesser General Public License along with this program.  If
0031    not, see http://www.gnu.org/licenses/.
0032 */
0033
0034 #ifndef NETTLE_SHA1_H_INCLUDED
0035 #define NETTLE_SHA1_H_INCLUDED
0036
0037 #include "nettle-types.h"
0038
0039 #ifdef __cplusplus
0040 extern "C" {
0041 #endif
0042
0043 /* Name mangling */
0044 #define sha1_init nettle_sha1_init
0045 #define sha1_update nettle_sha1_update
0046 #define sha1_digest nettle_sha1_digest
0047 #define sha1_compress nettle_sha1_compress
0048
0049 /* SHA1 */
0050
0051 #define SHA1_DIGEST_SIZE 20
0052 #define SHA1_BLOCK_SIZE 64
0053 /* For backwards compatibility */
0054 #define SHA1_DATA_SIZE SHA1_BLOCK_SIZE
0055
0056 /* Digest is kept internally as 5 32-bit words. */
0057 #define _SHA1_DIGEST_LENGTH 5
0058
0059 struct sha1_ctx
0060 {
0061   uint32_t state[_SHA1_DIGEST_LENGTH];    /* State variables */
0062   uint64_t count;                         /* 64-bit block count */
0063   unsigned int index;                     /* index into buffer */
0064   uint8_t block[SHA1_BLOCK_SIZE];         /* SHA1 data buffer */
0065 };
0066
0067 void
0068 sha1_init(struct sha1_ctx *ctx);
0069
0070 void
0071 sha1_update(struct sha1_ctx *ctx,
0072         size_t length,
0073         const uint8_t *data);
0074
0075 void
0076 sha1_digest(struct sha1_ctx *ctx,
0077         size_t length,
0078         uint8_t *digest);
0079
0080 /* SHA1 compression function. STATE points to 5 uint32_t words,
0081    and DATA points to 64 bytes of input data, possibly unaligned. */
0082 void
0083 sha1_compress(uint32_t *state, const uint8_t *data);
0084
0085 /* Old name, for backwards compatibility. */
0086 #define _nettle_sha1_compress nettle_sha1_compress
0087
0088 #ifdef __cplusplus
0089 }
0090 #endif
0091
0092 #endif /* NETTLE_SHA1_H_INCLUDED */