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1 | /* |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2016 Rob Norris <rw_norris@hotmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but 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 this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | #include "md5_hash.h" | |
22 | #include <glib.h> | |
23 | #include <glib/gstdio.h> | |
24 | #include <string.h> | |
25 | #ifdef HAVE_CONFIG_H | |
26 | #include "config.h" | |
27 | #endif | |
28 | #ifdef HAVE_LIBNETTLE | |
29 | #include <nettle/md5-compat.h> | |
30 | #endif | |
31 | ||
32 | /** | |
33 | * Get MD5 hash of a string using a library function | |
34 | */ | |
35 | char *md5_hash(const char *message) | |
36 | { | |
37 | char *answer = NULL; | |
38 | #ifdef HAVE_LIBNETTLE | |
39 | unsigned char result[16]; | |
40 | MD5_CTX ctx; | |
41 | MD5Init ( &ctx ); | |
42 | MD5Update ( &ctx, (const unsigned char*)message, strlen(message) ); | |
43 | MD5Final ( &result[0], &ctx ); | |
44 | /* | |
45 | g_printf ( "%s: of string '%s' is: ", __FUNCTION__, message ); | |
46 | for(int i = 0; i < 16; i++) | |
47 | g_printf ( "%02x", result[i]); | |
48 | g_printf("\n"); | |
49 | */ | |
50 | // Should be nicer way of converting this but I can't think of one ATM | |
51 | answer = g_strdup_printf ( "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", | |
52 | result[0],result[1],result[2],result[3],result[4],result[5],result[6],result[7], | |
53 | result[8],result[9],result[10],result[11],result[12],result[13],result[14],result[15]); | |
54 | #else | |
55 | // Return something that might vaguely work in case you've disabled MD5 support | |
56 | // but you should know what you've doing and uses of it (such as thumbnail caching) now won't work well | |
57 | guint value = g_str_hash ( message ); | |
58 | answer = g_strdup_printf ( "%d", value ); | |
59 | #endif | |
60 | return answer; | |
61 | } |