nix/libutil/gcrypt-hash.hh

   1 /* Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
   2    Copyright (C) 2012  Ludovic Courtès <ludo@gnu.org>
   3
   4    This file is part of Guix.
   5
   6    Guix is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or (at
   9    your option) any later version.
  10
  11    Guix is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Guix.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* An OpenSSL-like interface to GNU libgcrypt cryptographic hash
  20    functions.  */
  21
  22 #pragma once
  23 #include <gcrypt.h>
  24 #include <unistd.h>
  25
  26 extern "C" {
  27
  28 struct guix_hash_context
  29 {
  30   gcry_md_hd_t md_handle;
  31 };
  32
  33 extern void guix_hash_init (struct guix_hash_context *ctx, gcry_md_algo_t algo);
  34 extern void guix_hash_update (struct guix_hash_context *ctx, const void *buffer,
  35                               size_t len);
  36 extern void guix_hash_final (void *resbuf, struct guix_hash_context *ctx,
  37                              gcry_md_algo_t algo);
  38
  39 }