release/src/router/nettle/sha1.h

   1 /* sha1.h
   2  *
   3  * The sha1 hash function.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2001, 2012 Niels Möller
   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., 51 Franklin Street, Fifth Floor, Boston,
  23  * MA 02111-1301, USA.
  24  */
  25
  26 #ifndef NETTLE_SHA1_H_INCLUDED
  27 #define NETTLE_SHA1_H_INCLUDED
  28
  29 #include "nettle-types.h"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /* Name mangling */
  36 #define sha1_init nettle_sha1_init
  37 #define sha1_update nettle_sha1_update
  38 #define sha1_digest nettle_sha1_digest
  39
  40 /* SHA1 */
  41
  42 #define SHA1_DIGEST_SIZE 20
  43 #define SHA1_DATA_SIZE 64
  44
  45 /* Digest is kept internally as 5 32-bit words. */
  46 #define _SHA1_DIGEST_LENGTH 5
  47
  48 struct sha1_ctx
  49 {
  50   uint32_t state[_SHA1_DIGEST_LENGTH];    /* State variables */
  51   uint32_t count_low, count_high;         /* 64-bit block count */
  52   uint8_t block[SHA1_DATA_SIZE];          /* SHA1 data buffer */
  53   unsigned int index;                     /* index into buffer */
  54 };
  55
  56 void
  57 sha1_init(struct sha1_ctx *ctx);
  58
  59 void
  60 sha1_update(struct sha1_ctx *ctx,
  61             unsigned length,
  62             const uint8_t *data);
  63
  64 void
  65 sha1_digest(struct sha1_ctx *ctx,
  66             unsigned length,
  67             uint8_t *digest);
  68
  69 /* Internal compression function. STATE points to 5 uint32_t words,
  70    and DATA points to 64 bytes of input data, possibly unaligned. */
  71 void
  72 _nettle_sha1_compress(uint32_t *state, const uint8_t *data);
  73
  74 #ifdef __cplusplus
  75 }
  76 #endif
  77
  78 #endif /* NETTLE_SHA1_H_INCLUDED */