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 
 */

#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	/* 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	#include <sys/types.h>
22	#include <windows.h>
23
24	#include "../resource.h"
25	#include "wptNLS.h"
26	#include "wptGPG.h"
27	#include "wptErrors.h"
28	#include "wptTypes.h"
29	#include "wptW32API.h"
30	#include "wptVersion.h"
31	#include "wptCommonCtl.h"
32	#include "wptContext.h"
33	#include "wptRegistry.h"
34	#include "wptDlgs.h"
35
36	#include "openpgp.h"
37
38	BOOL CALLBACK keycache_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam);
39	void progress_cleanup (progress_filter_s * pfx);
40
41	static gpg_keycache_t pub = NULL;
42	static gpg_keycache_t sec = NULL;
43	static unsigned int reload = 0;
44	static char *gpg_secring = NULL;
45
46
47	/* Reload the key cache. */
48	void
49	keycache_reload (HWND dlg)
50	{
51	refresh_cache_s rcs;
52
53	memset (&rcs, 0, sizeof rcs);
54	rcs.kr_reload = rcs.kr_update = 1;
55	rcs.tr_update = 0;
56	DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,
57	keycache_dlg_proc, (LPARAM)&rcs);
58	}
59
60
61	/* Release both key cache objects. If @cleanup is 1,
62	also release other global structs. */
63	void
64	keycache_release (int cleanup)
65	{
66	int n = gpg_keycache_get_size (pub);
67	char tmpbuf[64];
68
69	/* XXX: update the value when the cache has changed. */
70	sprintf (tmpbuf, "%d", n);
71	set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
72
73	if (pub) {
74	gpg_keycache_release (pub);
75	pub = NULL;
76	}
77	if (sec) {
78	gpg_keycache_release (sec);
79	sec = NULL;
80	}
81	if (cleanup) {
82	if (gpg_secring)
83	free (gpg_secring);
84	gpg_secring = NULL;
85	}
86	}
87
88
89	/* Update the key with the keyid @keyid in the key cache.
90	If @is_sec is 1, the secret key cache is used. */
91	gpgme_error_t
92	keycache_update (int is_sec, const char *keyid)
93	{
94	gpg_keycache_t ctx = pub;
95	gpgme_error_t err;
96
97	if (is_sec)
98	ctx = sec;
99	err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
100	if (is_sec)
101	gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
102	return err;
103	}
104
105	/* XXX: cache_keyring_names must be called then the GPG homedir changes! */
106
107	/* Initialize both cache contexts. Use @pubring for the public
108	keyring and @secring for the secret keyring. */
109	gpgme_error_t
110	keycache_init (const char pubring, const char secring)
111	{
112	struct progress_filter_s pfx;
113	gpgme_error_t err;
114	int val = 0;
115	char *p;
116
117	if (secring != NULL) {
118	free_if_alloc (gpg_secring);
119	gpg_secring = get_gnupg_keyring (0, NO_STRICT);
120	}
121
122	if (reload) {
123	keycache_release (0);
124	reload = 0;
125	}
126	p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
127	if (p && *p != ' ') {
128	val = atoi (p);
129	free_if_alloc (p);
130	memset (&pfx, 0, sizeof (pfx));
131	}
132
133	err = gpg_keycache_new (&pub);
134	if (err)
135	return err;
136	if (val != 0)
137	gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
138	err = gpg_keycache_new (&sec);
139	if (!err)
140	err = gpg_keycache_init (pub, NULL, 0);
141	if (!err)
142	err = gpg_keycache_init( sec, NULL, 1 );
143	if( !err && pubring && *pubring )
144	err = gpg_keycache_prepare( pub, pubring, NULL );
145	if( !err && secring && * secring )
146	err = gpg_keycache_prepare( sec, NULL, secring );
147	if (!err)
148	gpg_keycache_sync (pub, sec);
149	if (val != 0)
150	progress_cleanup (&pfx);
151	return err;
152	}
153
154
155	/* If @val = 1 indicate to reload the cache. */
156	void
157	keycache_set_reload (int val)
158	{
159	reload = val;
160	}
161
162
163	/* Return the reload cache flag. */
164	int
165	keycache_get_reload (void)
166	{
167	return reload;
168	}
169
170
171	/* Return the public cache context if @is_pub is set
172	the secre cache context otherwise. */
173	gpg_keycache_t
174	keycache_get_ctx (int is_pub)
175	{
176	return is_pub? pub : sec;
177	}
178
179
180	/* Get the GPG key with keyid @keyid from the cache. Return it
181	in @r_key on success. */
182	static int
183	get_key_from_cache (const char keyid, gpgme_key_t r_key,
184	struct keycache_s **c, int secret)
185	{
186	gpg_keycache_t cache;
187	gpgme_error_t err;
188	int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
189
190	if (!keyid)
191	return WPTERR_GENERAL;
192	if (r_key)
193	*r_key = NULL;
194	cache = keycache_get_ctx (mode);
195	if (!cache)
196	BUG( NULL );
197	if (!c)
198	err = gpg_keycache_find_key (cache, keyid, 0, r_key);
199	else
200	err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
201	return err? WPTERR_GENERAL : 0;
202	}
203
204
205	/* Get GPG key with keyid @keyid directly from GPG and return
206	it in @r_key on success. */
207	static int
208	get_key_directly (const char keyid, gpgme_key_t r_key, int secret)
209	{
210	gpgme_ctx_t ctx;
211	gpgme_error_t err;
212
213	err = gpgme_new (&ctx);
214	if (err)
215	return WPTERR_GENERAL;
216	err = gpgme_get_key (ctx, keyid, r_key, secret);
217	gpgme_release (ctx);
218	return err? WPTERR_GENERAL : 0;
219	}
220
221
222	/* Search the public key with @keyid as the keyid in the cache and
223	return the item in @k. */
224	int
225	winpt_get_pubkey (const char keyid, winpt_key_s k)
226	{
227	int rc;
228
229	rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
230	if (rc)
231	return rc;
232	k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
233	strlen (k->ctx->subkeys->fpr) == 32;
234	k->is_protected = k->ext->gloflags.is_protected;
235	k->keyid = k->ctx->subkeys->keyid;
236	k->uid = k->ctx->uids->uid;
237	return rc;
238	}
239
240
241	int
242	winpt_get_seckey (const char keyid, winpt_key_s k)
243	{
244	int rc;
245	rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
246	if (rc)
247	return rc;
248	k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
249	strlen (k->ctx->subkeys->fpr) == 32;
250	k->is_protected = k->ext->gloflags.is_protected;
251	k->keyid = k->ctx->subkeys->keyid;
252	k->uid = k->ctx->uids->uid;
253	return rc;
254	}
255
256
257	int
258	get_pubkey (const char keyid, gpgme_key_t ret_key)
259	{
260	int rc;
261
262	if (pub && sec)
263	rc = get_key_from_cache (keyid, ret_key, NULL, 0);
264	else
265	rc = get_key_directly (keyid, ret_key, 0);
266	return rc;
267	}
268
269
270	int
271	get_seckey (const char keyid, gpgme_key_t ret_skey)
272	{
273	int rc;
274
275	if (pub && sec)
276	rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
277	else
278	rc = get_key_directly (keyid, ret_skey, 1);
279	return rc;
280	}
281
282
283	/* Search for insecure ElGamal keys and return the
284	number of founded keys. */
285	int
286	count_insecure_elgkeys (void)
287	{
288	gpg_keycache_t pc;
289	gpgme_key_t key;
290	int n=0;
291
292	pc = keycache_get_ctx (1);
293	if (!pc)
294	BUG (0);
295	while (!gpg_keycache_next_key (pc, 0, &key)) {
296	if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
297	n++;
298	}
299	gpg_keycache_rewind (pc);
300	return n;
301	}