1 /* sha1.h 2 * 3 * The sha1 hash function. 4 */ 5 6 /* nettle, low-level cryptographics library 7 * 8 * Copyright (C) 2001 Niels M�ller 9 * 10 * The nettle library is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU Lesser General Public License as published by 12 * the Free Software Foundation; either version 2.1 of the License, or (at your 13 * option) any later version. 14 * 15 * The nettle library is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 17 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 18 * License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public License 21 * along with the nettle library; see the file COPYING.LIB. If not, write to 22 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, 23 * MA 02111-1307, USA. 24 */ 25 26 #ifndef NETTLE_SHA1_H_INCLUDED 27 #define NETTLE_SHA1_H_INCLUDED 28 29 #include <stdint.h> 30 31 #define SHA1_DIGEST_SIZE 20 32 #define SHA1_DATA_SIZE 64 33 34 /* Digest is kept internally as 4 32-bit words. */ 35 #define _SHA1_DIGEST_LENGTH 5 36 37 struct sha1_ctx 38 { 39 uint32_t digest[_SHA1_DIGEST_LENGTH]; /* Message digest */ 40 uint32_t count_low, count_high; /* 64-bit block count */ 41 uint8_t block[SHA1_DATA_SIZE]; /* SHA1 data buffer */ 42 unsigned int index; /* index into buffer */ 43 }; 44 45 void 46 sha1_init(struct sha1_ctx *ctx); 47 48 void 49 sha1_update(struct sha1_ctx *ctx, 50 unsigned length, 51 const uint8_t *data); 52 53 void 54 sha1_final(struct sha1_ctx *ctx); 55 56 void 57 sha1_digest(const struct sha1_ctx *ctx, 58 unsigned length, 59 uint8_t *digest); 60 61 #endif /* NETTLE_SHA1_H_INCLUDED */