lib/sha256.h

   1 /*
   2  *      BIRD Library -- SHA-256 and SHA-224 Hash Functions
   3  *
   4  *      (c) 2015 CZ.NIC z.s.p.o.
   5  *
   6  *      Based on the code from libgcrypt-1.6.0, which is
   7  *      (c) 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
   8  *
   9  *      Can be freely distributed and used under the terms of the GNU GPL.
  10  */
  11
  12 #ifndef _BIRD_SHA256_H_
  13 #define _BIRD_SHA256_H_
  14
  15 #include "nest/bird.h"
  16
  17
  18 #define SHA224_SIZE             28
  19 #define SHA224_HEX_SIZE         57
  20 #define SHA224_BLOCK_SIZE       64
  21
  22 #define SHA256_SIZE             32
  23 #define SHA256_HEX_SIZE         65
  24 #define SHA256_BLOCK_SIZE       64
  25
  26
  27 struct hash_context;
  28
  29 struct sha256_context {
  30   u32  h0, h1, h2, h3, h4, h5, h6, h7;
  31   byte buf[SHA256_BLOCK_SIZE];
  32   uint nblocks;
  33   uint count;
  34 };
  35
  36 #define sha224_context sha256_context
  37
  38
  39 void sha256_init(struct hash_context *ctx);
  40 void sha224_init(struct hash_context *ctx);
  41
  42 void sha256_update(struct hash_context *ctx, const byte *buf, uint len);
  43 #define sha224_update sha256_update
  44
  45 byte *sha256_final(struct hash_context *ctx);
  46 #define sha224_final sha256_final
  47
  48
  49 #endif /* _BIRD_SHA256_H_ */