trunk/Gnupg/md.c

/* md.c - message digest wrapper
 *        Copyright (C) 2003, 2004 Timo Schulz
 *
 * This file is part of GPGLIB.
 *
 * GPGLIB is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GPGLIB is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GPGLIB; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <windows.h>
#include <stdio.h>
#include <malloc.h>
#include <sys/types.h>

#include "openpgp.h"
#include "md.h"

struct gpgm_md_s {
    void * ctx;
    int algo;
    void (*write)( void *ctx, unsigned char *inbuf, size_t inlen );
};


gpg_md_t
gpg_md_open( int algo )
{
    gpg_md_t md;

    if (algo != MD_SHA1 && algo != MD_MD5 && algo != MD_RMD160)
        return NULL;
    md = calloc (1, sizeof * md);
    if (!md)
        return NULL;
    switch (algo) {
    case MD_MD5:
        md->ctx = calloc( 1, sizeof (MD5_CONTEXT) );
        if( !md->ctx ) {
            free( md );
            return NULL;
        }
        md5_init( (MD5_CONTEXT *)md->ctx );
        md->write = md5_write;
        break;

    case MD_SHA1:
        md->ctx = calloc( 1, sizeof (SHA1_CONTEXT) );
        if( !md->ctx ) {
            free( md );
            return NULL;
        }
        sha1_init( (SHA1_CONTEXT *)md->ctx );
        md->write = sha1_write;
        break;

    case MD_RMD160:
        md->ctx = calloc( 1, sizeof (RMD160_CONTEXT) );
        if( !md->ctx ) {
            free( md );
            return NULL;
        }
        rmd160_init( (RMD160_CONTEXT *)md->ctx );
        md->write = rmd160_write;
        break;
        
    default:
        free( md );
        return NULL;
    }
    md->algo = algo;
    return md;
}


void
gpg_md_close( gpg_md_t md )
{
    if( md ) {
        md->algo = 0;
        md->write = NULL;
        free( md->ctx ); md->ctx = NULL;
        free( md );
    }
}


void
gpg_md_final( gpg_md_t md )
{
    switch( md->algo ) {
    case MD_MD5   : md5_final( (MD5_CONTEXT *)md->ctx ); break;
    case MD_SHA1  : sha1_final( (SHA1_CONTEXT *) md->ctx ); break;
    case MD_RMD160: rmd160_final( (RMD160_CONTEXT *) md->ctx ); break;
    }
}


const unsigned char *
gpg_md_read (gpg_md_t md)
{
    switch( md->algo ) {
    case MD_MD5   : return md5_read( (MD5_CONTEXT *)md->ctx ); break;
    case MD_SHA1  : return sha1_read( (SHA1_CONTEXT *)md->ctx ); break;
    case MD_RMD160: return rmd160_read( (RMD160_CONTEXT *)md->ctx ); break;
    }
    return NULL;
}


void
gpg_md_putc( gpg_md_t md, int c )
{
    unsigned char buf[1];
    buf[0] = c & 0xff;
    md->write( md->ctx, buf, 1 );
}


size_t
_md_get_digest_len (gpg_md_t md)
{
    switch (md->algo) {
    case MD_MD5:
        return 16;
    case MD_SHA1:
    case MD_RMD160:
        return 20;
    }
    return 0;
}


void
gpg_md_write( gpg_md_t md, unsigned char *inbuf, size_t len )
{
    if( md )
        md->write( md->ctx, inbuf, len );
}
1	/* md.c - message digest wrapper
2	* Copyright (C) 2003, 2004 Timo Schulz
3	*
4	* This file is part of GPGLIB.
5	*
6	* GPGLIB 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	* GPGLIB 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 GPGLIB; if not, write to the Free Software Foundation,
18	* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	#ifdef HAVE_CONFIG_H
22	#include <config.h>
23	#endif
24
25	#include <windows.h>
26	#include <windows.h>
27	#include <stdio.h>
28	#include <malloc.h>
29	#include <sys/types.h>
30
31	#include "openpgp.h"
32	#include "md.h"
33
34	struct gpgm_md_s {
35	void * ctx;
36	int algo;
37	void (write)( void ctx, unsigned char *inbuf, size_t inlen );
38	};
39
40
41	gpg_md_t
42	gpg_md_open( int algo )
43	{
44	gpg_md_t md;
45
46	if (algo != MD_SHA1 && algo != MD_MD5 && algo != MD_RMD160)
47	return NULL;
48	md = calloc (1, sizeof * md);
49	if (!md)
50	return NULL;
51	switch (algo) {
52	case MD_MD5:
53	md->ctx = calloc( 1, sizeof (MD5_CONTEXT) );
54	if( !md->ctx ) {
55	free( md );
56	return NULL;
57	}
58	md5_init( (MD5_CONTEXT *)md->ctx );
59	md->write = md5_write;
60	break;
61
62	case MD_SHA1:
63	md->ctx = calloc( 1, sizeof (SHA1_CONTEXT) );
64	if( !md->ctx ) {
65	free( md );
66	return NULL;
67	}
68	sha1_init( (SHA1_CONTEXT *)md->ctx );
69	md->write = sha1_write;
70	break;
71
72	case MD_RMD160:
73	md->ctx = calloc( 1, sizeof (RMD160_CONTEXT) );
74	if( !md->ctx ) {
75	free( md );
76	return NULL;
77	}
78	rmd160_init( (RMD160_CONTEXT *)md->ctx );
79	md->write = rmd160_write;
80	break;
81
82	default:
83	free( md );
84	return NULL;
85	}
86	md->algo = algo;
87	return md;
88	}
89
90
91	void
92	gpg_md_close( gpg_md_t md )
93	{
94	if( md ) {
95	md->algo = 0;
96	md->write = NULL;
97	free( md->ctx ); md->ctx = NULL;
98	free( md );
99	}
100	}
101
102
103	void
104	gpg_md_final( gpg_md_t md )
105	{
106	switch( md->algo ) {
107	case MD_MD5 : md5_final( (MD5_CONTEXT *)md->ctx ); break;
108	case MD_SHA1 : sha1_final( (SHA1_CONTEXT *) md->ctx ); break;
109	case MD_RMD160: rmd160_final( (RMD160_CONTEXT *) md->ctx ); break;
110	}
111	}
112
113
114	const unsigned char *
115	gpg_md_read (gpg_md_t md)
116	{
117	switch( md->algo ) {
118	case MD_MD5 : return md5_read( (MD5_CONTEXT *)md->ctx ); break;
119	case MD_SHA1 : return sha1_read( (SHA1_CONTEXT *)md->ctx ); break;
120	case MD_RMD160: return rmd160_read( (RMD160_CONTEXT *)md->ctx ); break;
121	}
122	return NULL;
123	}
124
125
126	void
127	gpg_md_putc( gpg_md_t md, int c )
128	{
129	unsigned char buf[1];
130	buf[0] = c & 0xff;
131	md->write( md->ctx, buf, 1 );
132	}
133
134
135	size_t
136	_md_get_digest_len (gpg_md_t md)
137	{
138	switch (md->algo) {
139	case MD_MD5:
140	return 16;
141	case MD_SHA1:
142	case MD_RMD160:
143	return 20;
144	}
145	return 0;
146	}
147
148
149	void
150	gpg_md_write( gpg_md_t md, unsigned char *inbuf, size_t len )
151	{
152	if( md )
153	md->write( md->ctx, inbuf, len );
154	}