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233e7676 | 1 | /* GNU Guix --- Functional package management for GNU |
ea167380 | 2 | Copyright (C) 2012, 2013 Ludovic Courtès <ludo@gnu.org> |
c2033df4 | 3 | |
233e7676 | 4 | This file is part of GNU Guix. |
c2033df4 | 5 | |
233e7676 | 6 | GNU Guix is free software; you can redistribute it and/or modify it |
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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 | ||
233e7676 | 11 | GNU Guix is distributed in the hope that it will be useful, but |
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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 | |
233e7676 | 17 | along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */ |
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18 | |
19 | #include <config.h> | |
20 | ||
21 | #include <gcrypt-hash.hh> | |
22 | #include <assert.h> | |
23 | ||
24 | extern "C" { | |
25 | ||
26 | void | |
ea167380 | 27 | guix_hash_init (struct guix_hash_context *ctx, int algo) |
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28 | { |
29 | gcry_error_t err; | |
30 | ||
31 | err = gcry_md_open (&ctx->md_handle, algo, 0); | |
32 | assert (err == GPG_ERR_NO_ERROR); | |
33 | } | |
34 | ||
35 | void | |
36 | guix_hash_update (struct guix_hash_context *ctx, const void *buffer, size_t len) | |
37 | { | |
38 | gcry_md_write (ctx->md_handle, buffer, len); | |
39 | } | |
40 | ||
41 | void | |
42 | guix_hash_final (void *resbuf, struct guix_hash_context *ctx, | |
ea167380 | 43 | int algo) |
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44 | { |
45 | memcpy (resbuf, gcry_md_read (ctx->md_handle, algo), | |
46 | gcry_md_get_algo_dlen (algo)); | |
47 | gcry_md_close (ctx->md_handle); | |
0c5028fa | 48 | ctx->md_handle = NULL; |
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49 | } |
50 | ||
51 | } |