lib/hmac.h

   1 /* hmac.h -- hashed message authentication codes
   2    Copyright (C) 2005, 2009-2020 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Simon Josefsson.  */
  18
  19 #ifndef HMAC_H
  20 # define HMAC_H 1
  21
  22 #include <stddef.h>
  23
  24 /* Compute Hashed Message Authentication Code with MD5, as described
  25    in RFC 2104, over BUFFER data of BUFLEN bytes using the KEY of
  26    KEYLEN bytes, writing the output to pre-allocated 16 byte minimum
  27    RESBUF buffer.  Return 0 on success.  */
  28 int
  29 hmac_md5 (const void *key, size_t keylen,
  30           const void *buffer, size_t buflen, void *restrict resbuf);
  31
  32 /* Compute Hashed Message Authentication Code with SHA-1, over BUFFER
  33    data of BUFLEN bytes using the KEY of KEYLEN bytes, writing the
  34    output to pre-allocated 20 byte minimum RESBUF buffer.  Return 0 on
  35    success.  */
  36 int
  37 hmac_sha1 (const void *key, size_t keylen,
  38            const void *in, size_t inlen, void *restrict resbuf);
  39
  40 /* Compute Hashed Message Authentication Code with SHA-256, over BUFFER
  41    data of BUFLEN bytes using the KEY of KEYLEN bytes, writing the
  42    output to pre-allocated 32 byte minimum RESBUF buffer.  Return 0 on
  43    success.  */
  44 int
  45 hmac_sha256 (const void *key, size_t keylen,
  46              const void *in, size_t inlen, void *restrict resbuf);
  47
  48 /* Compute Hashed Message Authentication Code with SHA-512, over BUFFER
  49    data of BUFLEN bytes using the KEY of KEYLEN bytes, writing the
  50    output to pre-allocated 64 byte minimum RESBUF buffer.  Return 0 on
  51    success.  */
  52 int
  53 hmac_sha512 (const void *key, size_t keylen,
  54              const void *in, size_t inlen, void *restrict resbuf);
  55
  56 #endif /* HMAC_H */