release/src/router/nettle/sha2.h

   1 /* sha2.h
   2  *
   3  * The sha2 family of hash functions.
   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_SHA2_H_INCLUDED
  27 #define NETTLE_SHA2_H_INCLUDED
  28
  29 #include "nettle-types.h"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /* Name mangling */
  36 #define sha224_init nettle_sha224_init
  37 #define sha224_digest nettle_sha224_digest
  38 #define sha256_init nettle_sha256_init
  39 #define sha256_update nettle_sha256_update
  40 #define sha256_digest nettle_sha256_digest
  41 #define sha384_init nettle_sha384_init
  42 #define sha384_digest nettle_sha384_digest
  43 #define sha512_init nettle_sha512_init
  44 #define sha512_update nettle_sha512_update
  45 #define sha512_digest nettle_sha512_digest
  46
  47 /* SHA256 */
  48
  49 #define SHA256_DIGEST_SIZE 32
  50 #define SHA256_DATA_SIZE 64
  51
  52 /* Digest is kept internally as 8 32-bit words. */
  53 #define _SHA256_DIGEST_LENGTH 8
  54
  55 struct sha256_ctx
  56 {
  57   uint32_t state[_SHA256_DIGEST_LENGTH];    /* State variables */
  58   uint32_t count_low, count_high;           /* 64-bit block count */
  59   uint8_t block[SHA256_DATA_SIZE];          /* SHA256 data buffer */
  60   unsigned int index;                       /* index into buffer */
  61 };
  62
  63 void
  64 sha256_init(struct sha256_ctx *ctx);
  65
  66 void
  67 sha256_update(struct sha256_ctx *ctx,
  68               unsigned length,
  69               const uint8_t *data);
  70
  71 void
  72 sha256_digest(struct sha256_ctx *ctx,
  73               unsigned length,
  74               uint8_t *digest);
  75
  76 /* Internal compression function. STATE points to 8 uint32_t words,
  77    DATA points to 64 bytes of input data, possibly unaligned, and K
  78    points to the table of constants. */
  79 void
  80 _nettle_sha256_compress(uint32_t *state, const uint8_t *data, const uint32_t *k);
  81
  82
  83 /* SHA224, a truncated SHA256 with different initial state. */
  84
  85 #define SHA224_DIGEST_SIZE 28
  86 #define SHA224_DATA_SIZE SHA256_DATA_SIZE
  87 #define sha224_ctx sha256_ctx
  88
  89 void
  90 sha224_init(struct sha256_ctx *ctx);
  91
  92 #define sha224_update nettle_sha256_update
  93
  94 void
  95 sha224_digest(struct sha256_ctx *ctx,
  96               unsigned length,
  97               uint8_t *digest);
  98
  99
 100 /* SHA512 */
 101
 102 #define SHA512_DIGEST_SIZE 64
 103 #define SHA512_DATA_SIZE 128
 104
 105 /* Digest is kept internally as 8 64-bit words. */
 106 #define _SHA512_DIGEST_LENGTH 8
 107
 108 struct sha512_ctx
 109 {
 110   uint64_t state[_SHA512_DIGEST_LENGTH];    /* State variables */
 111   uint64_t count_low, count_high;           /* 128-bit block count */
 112   uint8_t block[SHA512_DATA_SIZE];          /* SHA512 data buffer */
 113   unsigned int index;                       /* index into buffer */
 114 };
 115
 116 void
 117 sha512_init(struct sha512_ctx *ctx);
 118
 119 void
 120 sha512_update(struct sha512_ctx *ctx,
 121               unsigned length,
 122               const uint8_t *data);
 123
 124 void
 125 sha512_digest(struct sha512_ctx *ctx,
 126               unsigned length,
 127               uint8_t *digest);
 128
 129 /* Internal compression function. STATE points to 8 uint64_t words,
 130    DATA points to 128 bytes of input data, possibly unaligned, and K
 131    points to the table of constants. */
 132 void
 133 _nettle_sha512_compress(uint64_t *state, const uint8_t *data, const uint64_t *k);
 134
 135
 136 /* SHA384, a truncated SHA512 with different initial state. */
 137
 138 #define SHA384_DIGEST_SIZE 48
 139 #define SHA384_DATA_SIZE SHA512_DATA_SIZE
 140 #define sha384_ctx sha512_ctx
 141
 142 void
 143 sha384_init(struct sha512_ctx *ctx);
 144
 145 #define sha384_update nettle_sha512_update
 146
 147 void
 148 sha384_digest(struct sha512_ctx *ctx,
 149               unsigned length,
 150               uint8_t *digest);
 151
 152 #ifdef __cplusplus
 153 }
 154 #endif
 155
 156 #endif /* NETTLE_SHA2_H_INCLUDED */