1 /* GNU Guix --- Functional package management for GNU
2 Copyright (C) 2012, 2013 Ludovic Courtès <ludo@gnu.org>
4 This file is part of GNU Guix.
6 GNU 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.
11 GNU 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.
16 You should have received a copy of the GNU General Public License
17 along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
19 /* An OpenSSL-like interface to GNU libgcrypt cryptographic hash
26 struct guix_hash_context
28 /* This copy constructor is needed in 'HashSink::currentHash()' where we
29 expect the copy of a 'Ctx' object to yield a truly different context. */
30 guix_hash_context (guix_hash_context
&ref
)
32 if (ref
.md_handle
== NULL
)
35 gcry_md_copy (&md_handle
, ref
.md_handle
);
38 /* Make sure 'md_handle' is always initialized. */
39 guix_hash_context (): md_handle (NULL
) { };
41 gcry_md_hd_t md_handle
;
45 extern void guix_hash_init (struct guix_hash_context
*ctx
, int algo
);
46 extern void guix_hash_update (struct guix_hash_context
*ctx
, const void *buffer
,
48 extern void guix_hash_final (void *resbuf
, struct guix_hash_context
*ctx
,