trunk/Src/wptGPGME.cpp

/* wptGPGME.cpp - WinPT GPGME interface
 *      Copyright (C) 2001-2005 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT 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.
 *  
 * WinPT 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 WinPT; 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 <sys/types.h>
#include <sys/types.h>
#include <windows.h>

#include "resource.h"
#include "wptNLS.h"
#include "wptGPG.h"
#include "wptErrors.h"
#include "wptTypes.h"
#include "wptW32API.h"
#include "wptVersion.h"
#include "wptCommonCtl.h"
#include "wptContext.h"
#include "wptRegistry.h"
#include "wptDlgs.h"

#include "openpgp.h"

BOOL CALLBACK  keycache_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam);
void progress_cleanup (progress_filter_s * pfx);

static gpg_keycache_t pub = NULL;
static gpg_keycache_t sec = NULL;
static unsigned int reload = 0;
static char *gpg_secring = NULL;


/* Reload the key cache. */
void
keycache_reload (HWND dlg) 
{       
    refresh_cache_s rcs;

    memset (&rcs, 0, sizeof rcs);
    rcs.kr_reload = rcs.kr_update = 1;
    rcs.tr_update = 0;
    DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                        
                    keycache_dlg_proc, (LPARAM)&rcs);
}


/* Release both key cache objects. If @cleanup is 1,
   also release other global structs. */
void
keycache_release (int cleanup)
{
    int n = gpg_keycache_get_size (pub);
    char tmpbuf[64];

    /* XXX: update the value when the cache has changed. */
    sprintf (tmpbuf, "%d", n);
    set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);

    if (pub) {
        gpg_keycache_release (pub); 
        pub = NULL;
    }
    if (sec) {
        gpg_keycache_release (sec);
        sec = NULL;
    }
    if (cleanup) {
        if (gpg_secring)
            free (gpg_secring);
        gpg_secring = NULL;
    }
}


/* Update the key with the keyid @keyid in the key cache.
   If @is_sec is 1, the secret key cache is used. */
gpgme_error_t
keycache_update (int is_sec, const char *keyid)
{
    gpg_keycache_t ctx = pub;
    gpgme_error_t err;

    if (is_sec)
        ctx = sec;
    err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
    if (is_sec)
        gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
    return err;
}

/* XXX: cache_keyring_names must be called then the GPG homedir changes! */

/* Initialize both cache contexts. Use @pubring for the public
   keyring and @secring for the secret keyring. */
gpgme_error_t
keycache_init (const char *pubring, const char *secring)
{
    struct progress_filter_s pfx;
    gpgme_error_t err;
    int val = 0;
    char *p;

    if (secring != NULL) {
        free_if_alloc (gpg_secring);
        gpg_secring = get_gnupg_keyring (0, NO_STRICT);
    }

    if (reload) {
        keycache_release (0);
        reload = 0;
    }
    p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
    if (p && *p != ' ') {
        val = atoi (p);
        free_if_alloc (p);
        memset (&pfx, 0, sizeof (pfx));
    }

    err = gpg_keycache_new (&pub);
    if (err)
        return err;
    if (val != 0)
        gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
    err = gpg_keycache_new (&sec);
    if (!err)
        err = gpg_keycache_init (pub, NULL, 0);
    if (!err)
        err = gpg_keycache_init( sec, NULL, 1 );
    if( !err && pubring && *pubring )
        err = gpg_keycache_prepare( pub, pubring, NULL );
    if( !err && secring && * secring )
        err = gpg_keycache_prepare( sec, NULL, secring );
    if (!err)
        gpg_keycache_sync (pub, sec);
    if (val != 0)
        progress_cleanup (&pfx);
    return err;
}


/* If @val = 1 indicate to reload the cache. */
void
keycache_set_reload (int val)
{
    reload = val;
}


/* Return the reload cache flag. */
int
keycache_get_reload (void)
{
    return reload;
}


/* Return the public cache context if @is_pub is set
   the secre cache context otherwise. */
gpg_keycache_t
keycache_get_ctx (int is_pub)
{
    return is_pub? pub : sec;
}


/* Get the GPG key with keyid @keyid from the cache. Return it 
   in @r_key on success. */
static int
get_key_from_cache (const char *keyid, gpgme_key_t *r_key, 
                    struct keycache_s **c, int secret)
{
    gpg_keycache_t cache;
    gpgme_error_t err;
    int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;

    if (!keyid)
        return WPTERR_GENERAL;
    if (r_key)
        *r_key = NULL;
    cache = keycache_get_ctx (mode);
    if (!cache)
        BUG( NULL );
    if (!c)
        err = gpg_keycache_find_key (cache, keyid, 0, r_key);
    else
        err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
    return err? WPTERR_GENERAL : 0;
}


/* Get GPG key with keyid @keyid directly from GPG and return
   it in @r_key on success. */
static int
get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)
{
    gpgme_ctx_t ctx;
    gpgme_error_t err;

    err = gpgme_new (&ctx);
    if (err)
        return WPTERR_GENERAL;
    err = gpgme_get_key (ctx, keyid, r_key, secret);
    gpgme_release (ctx);
    return err? WPTERR_GENERAL : 0;
}


/* Search the public key with @keyid as the keyid in the cache and
   return the item in @k. */
int
winpt_get_pubkey (const char *keyid, winpt_key_s *k)
{
    int rc;
    
    rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
    if (rc)
        return rc;
    k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA && 
                strlen (k->ctx->subkeys->fpr) == 32;
    k->is_protected = k->ext->gloflags.is_protected;
    k->keyid = k->ctx->subkeys->keyid;
    k->uid = k->ctx->uids->uid;
    return rc;
}


int
winpt_get_seckey (const char *keyid, winpt_key_s *k)
{
    int rc;
    rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
    if (rc)
        return rc;
    k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA && 
                strlen (k->ctx->subkeys->fpr) == 32;
    k->is_protected = k->ext->gloflags.is_protected;
    k->keyid = k->ctx->subkeys->keyid;
    k->uid = k->ctx->uids->uid;
    return rc;
}


int
get_pubkey (const char *keyid, gpgme_key_t *ret_key)
{
    int rc;

    if (pub && sec)
        rc = get_key_from_cache (keyid, ret_key, NULL, 0);
    else
        rc = get_key_directly (keyid, ret_key, 0);
    return rc;
}


int
get_seckey (const char *keyid, gpgme_key_t *ret_skey)
{
    int rc;

    if (pub && sec)
        rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
    else
        rc = get_key_directly (keyid, ret_skey, 1);
    return rc;
}


/* Search for insecure ElGamal keys and return the
   number of founded keys. */
int
count_insecure_elgkeys (void)
{
    gpg_keycache_t pc;
    gpgme_key_t key;
    int n=0;

    pc = keycache_get_ctx (1);
    if (!pc)
        BUG (0);
    while (!gpg_keycache_next_key (pc, 0, &key)) {
        if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
            n++;
    }
    gpg_keycache_rewind (pc);
    return n;
}
1	werner	36	/* wptGPGME.cpp - WinPT GPGME interface
2			* Copyright (C) 2001-2005 Timo Schulz
3			*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* WinPT 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 GNU
14			* General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with WinPT; 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 <sys/types.h>
26			#include <sys/types.h>
27			#include <windows.h>
28
29	werner	47	#include "resource.h"
30	werner	36	#include "wptNLS.h"
31			#include "wptGPG.h"
32			#include "wptErrors.h"
33			#include "wptTypes.h"
34			#include "wptW32API.h"
35			#include "wptVersion.h"
36			#include "wptCommonCtl.h"
37			#include "wptContext.h"
38			#include "wptRegistry.h"
39			#include "wptDlgs.h"
40
41			#include "openpgp.h"
42
43			BOOL CALLBACK keycache_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam);
44			void progress_cleanup (progress_filter_s * pfx);
45
46			static gpg_keycache_t pub = NULL;
47			static gpg_keycache_t sec = NULL;
48			static unsigned int reload = 0;
49			static char *gpg_secring = NULL;
50
51
52			/* Reload the key cache. */
53			void
54			keycache_reload (HWND dlg)
55			{
56			refresh_cache_s rcs;
57
58			memset (&rcs, 0, sizeof rcs);
59			rcs.kr_reload = rcs.kr_update = 1;
60			rcs.tr_update = 0;
61			DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,
62			keycache_dlg_proc, (LPARAM)&rcs);
63			}
64
65
66			/* Release both key cache objects. If @cleanup is 1,
67			also release other global structs. */
68			void
69			keycache_release (int cleanup)
70			{
71			int n = gpg_keycache_get_size (pub);
72			char tmpbuf[64];
73
74			/* XXX: update the value when the cache has changed. */
75			sprintf (tmpbuf, "%d", n);
76			set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
77
78			if (pub) {
79			gpg_keycache_release (pub);
80			pub = NULL;
81			}
82			if (sec) {
83			gpg_keycache_release (sec);
84			sec = NULL;
85			}
86			if (cleanup) {
87			if (gpg_secring)
88			free (gpg_secring);
89			gpg_secring = NULL;
90			}
91			}
92
93
94			/* Update the key with the keyid @keyid in the key cache.
95			If @is_sec is 1, the secret key cache is used. */
96			gpgme_error_t
97			keycache_update (int is_sec, const char *keyid)
98			{
99			gpg_keycache_t ctx = pub;
100			gpgme_error_t err;
101
102			if (is_sec)
103			ctx = sec;
104			err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
105			if (is_sec)
106			gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
107			return err;
108			}
109
110			/* XXX: cache_keyring_names must be called then the GPG homedir changes! */
111
112			/* Initialize both cache contexts. Use @pubring for the public
113			keyring and @secring for the secret keyring. */
114			gpgme_error_t
115			keycache_init (const char pubring, const char secring)
116			{
117			struct progress_filter_s pfx;
118			gpgme_error_t err;
119			int val = 0;
120			char *p;
121
122			if (secring != NULL) {
123			free_if_alloc (gpg_secring);
124			gpg_secring = get_gnupg_keyring (0, NO_STRICT);
125			}
126
127			if (reload) {
128			keycache_release (0);
129			reload = 0;
130			}
131			p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
132			if (p && *p != ' ') {
133			val = atoi (p);
134			free_if_alloc (p);
135			memset (&pfx, 0, sizeof (pfx));
136			}
137
138			err = gpg_keycache_new (&pub);
139			if (err)
140			return err;
141			if (val != 0)
142			gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
143			err = gpg_keycache_new (&sec);
144			if (!err)
145			err = gpg_keycache_init (pub, NULL, 0);
146			if (!err)
147			err = gpg_keycache_init( sec, NULL, 1 );
148			if( !err && pubring && *pubring )
149			err = gpg_keycache_prepare( pub, pubring, NULL );
150			if( !err && secring && * secring )
151			err = gpg_keycache_prepare( sec, NULL, secring );
152			if (!err)
153			gpg_keycache_sync (pub, sec);
154			if (val != 0)
155			progress_cleanup (&pfx);
156			return err;
157			}
158
159
160			/* If @val = 1 indicate to reload the cache. */
161			void
162			keycache_set_reload (int val)
163			{
164			reload = val;
165			}
166
167
168			/* Return the reload cache flag. */
169			int
170			keycache_get_reload (void)
171			{
172			return reload;
173			}
174
175
176			/* Return the public cache context if @is_pub is set
177			the secre cache context otherwise. */
178			gpg_keycache_t
179			keycache_get_ctx (int is_pub)
180			{
181			return is_pub? pub : sec;
182			}
183
184
185			/* Get the GPG key with keyid @keyid from the cache. Return it
186			in @r_key on success. */
187			static int
188			get_key_from_cache (const char keyid, gpgme_key_t r_key,
189			struct keycache_s **c, int secret)
190			{
191			gpg_keycache_t cache;
192			gpgme_error_t err;
193			int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
194
195			if (!keyid)
196			return WPTERR_GENERAL;
197			if (r_key)
198			*r_key = NULL;
199			cache = keycache_get_ctx (mode);
200			if (!cache)
201			BUG( NULL );
202			if (!c)
203			err = gpg_keycache_find_key (cache, keyid, 0, r_key);
204			else
205			err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
206			return err? WPTERR_GENERAL : 0;
207			}
208
209
210			/* Get GPG key with keyid @keyid directly from GPG and return
211			it in @r_key on success. */
212			static int
213			get_key_directly (const char keyid, gpgme_key_t r_key, int secret)
214			{
215			gpgme_ctx_t ctx;
216			gpgme_error_t err;
217
218			err = gpgme_new (&ctx);
219			if (err)
220			return WPTERR_GENERAL;
221			err = gpgme_get_key (ctx, keyid, r_key, secret);
222			gpgme_release (ctx);
223			return err? WPTERR_GENERAL : 0;
224			}
225
226
227			/* Search the public key with @keyid as the keyid in the cache and
228			return the item in @k. */
229			int
230			winpt_get_pubkey (const char keyid, winpt_key_s k)
231			{
232			int rc;
233
234			rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
235			if (rc)
236			return rc;
237			k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
238			strlen (k->ctx->subkeys->fpr) == 32;
239			k->is_protected = k->ext->gloflags.is_protected;
240			k->keyid = k->ctx->subkeys->keyid;
241			k->uid = k->ctx->uids->uid;
242			return rc;
243			}
244
245
246			int
247			winpt_get_seckey (const char keyid, winpt_key_s k)
248			{
249			int rc;
250			rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
251			if (rc)
252			return rc;
253			k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
254			strlen (k->ctx->subkeys->fpr) == 32;
255			k->is_protected = k->ext->gloflags.is_protected;
256			k->keyid = k->ctx->subkeys->keyid;
257			k->uid = k->ctx->uids->uid;
258			return rc;
259			}
260
261
262			int
263			get_pubkey (const char keyid, gpgme_key_t ret_key)
264			{
265			int rc;
266
267			if (pub && sec)
268			rc = get_key_from_cache (keyid, ret_key, NULL, 0);
269			else
270			rc = get_key_directly (keyid, ret_key, 0);
271			return rc;
272			}
273
274
275			int
276			get_seckey (const char keyid, gpgme_key_t ret_skey)
277			{
278			int rc;
279
280			if (pub && sec)
281			rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
282			else
283			rc = get_key_directly (keyid, ret_skey, 1);
284			return rc;
285			}
286
287
288			/* Search for insecure ElGamal keys and return the
289			number of founded keys. */
290			int
291			count_insecure_elgkeys (void)
292			{
293			gpg_keycache_t pc;
294			gpgme_key_t key;
295			int n=0;
296
297			pc = keycache_get_ctx (1);
298			if (!pc)
299			BUG (0);
300			while (!gpg_keycache_next_key (pc, 0, &key)) {
301			if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
302			n++;
303			}
304			gpg_keycache_rewind (pc);
305			return n;
306			}