Add GChecksum, a generic wrapper around various hashing algorithms. At the
[platform/upstream/glib.git] / glib / gchecksum.h
1 /* gchecksum.h - data hashing functions
2  *
3  * Copyright (C) 2007  Emmanuele Bassi  <ebassi@gnome.org>
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Library General Public License for more details.
14  *
15  * You should have received a copy of the GNU Library General Public
16  * License along with this library; if not, write to the
17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18  * Boston, MA 02111-1307, USA.
19  */
20
21 #ifndef __G_CHECKSUM_H__
22 #define __G_CHECKSUM_H__
23
24 #include <glib/gtypes.h>
25
26 G_BEGIN_DECLS
27
28 /**
29  * GChecksumType:
30  * @G_CHECKSUM_MD5: Use the MD5 hashing algorithm
31  * @G_CHECKSUM_SHA1: Use the SHA-1 hashing algorithm
32  * @G_CHECKSUM_SHA256: Use the SHA-256 hashing algorithm
33  *
34  * The hashing algorithm to be used by #GChecksum when performing the
35  * digest of some data.
36  *
37  * The #GChecksumType enumeration can be extended at later date to include
38  * new hashing algorithm types.
39  *
40  * Since: 2.16
41  */
42 typedef enum {
43   G_CHECKSUM_MD5,
44   G_CHECKSUM_SHA1,
45   G_CHECKSUM_SHA256
46 } GChecksumType;
47
48 typedef struct _GChecksum       GChecksum;
49
50 GChecksum *           g_checksum_new        (GChecksumType     checksum_type);
51 GChecksum *           g_checksum_copy       (const GChecksum  *checksum);
52 void                  g_checksum_free       (GChecksum        *checksum);
53 void                  g_checksum_update     (GChecksum        *checksum,
54                                              const guchar     *data,
55                                              gsize             length);
56 G_CONST_RETURN gchar *g_checksum_get_string (GChecksum        *checksum);
57 void                  g_checksum_get_digest (GChecksum        *checksum,
58                                              guint8          **digest,
59                                              gsize            *digest_len);
60
61 gchar *g_compute_checksum_for_data   (GChecksumType  checksum_type,
62                                       const guchar  *data,
63                                       gsize          length);
64 gchar *g_compute_checksum_for_string (GChecksumType  checksum_type,
65                                       const gchar   *str,
66                                       gsize          length);
67
68 G_END_DECLS
69
70 #endif /* __G_CHECKSUM_H__ */