trunk/Src/wptClipSignDlg.cpp

/* wptClipSignDlg.cpp - WinPT clipboard sign dialog
 *      Copyright (C) 2000-2006, 2009 Timo Schulz
 *      Copyright (C) 2005 g10 Code GmbH
 *
 * 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.
 */

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

#include <windows.h>
#include <commctrl.h>

#include "resource.h"
#include "wptTypes.h"
#include "wptAgent.h"
#include "wptNLS.h"
#include "wptCrypto.h"
#include "wptGPG.h"
#include "wptCommonCtl.h"
#include "wptRegistry.h"
#include "wptKeylist.h"
#include "wptErrors.h"
#include "wptW32API.h"
#include "wptVersion.h"
#include "wptContext.h" /* for passphrase_s */


/* Sign the clipboard contents with the key @keyid and wrap
   text lines to @wraplen (0 disable line wrapping).
   Return value: 0 on success. */
gpgme_error_t
gpg_clip_sign (gpgme_ctx_t ctx, const char *keyid, int wraplen)
{
    gpgme_error_t err;
    gpgme_data_t plain = NULL;
    gpgme_data_t sig = NULL;
    gpgme_key_t key = NULL;
    
    if (!keyid)
        return gpg_error (GPG_ERR_INV_ARG);
    
    gpgme_set_armor (ctx, 1);
    err = gpg_data_utf8_new_from_clipboard (&plain, wraplen, NULL);
    if (err)
        return err;
    err = get_pubkey (keyid, &key);
    if (err)
        goto leave;
    err = gpgme_signers_add (ctx, key);
    if (err)
        goto leave;
    err = gpgme_data_new (&sig);
    if (err)
        goto leave;
    err = gpgme_op_sign (ctx, plain, sig, GPGME_SIG_MODE_CLEAR);
    if (err)
        goto leave;
    
    gpg_data_release_to_clipboard (sig, 1);
    sig = NULL;    

leave:
    if (plain)
        gpgme_data_release (plain);
    if (sig)
        gpgme_data_release (sig);
    return err;
}


/* This function is used when only one secret key is available.
   it doesn't make sense to offer a dialog for this case. */
void
one_key_proc (HWND dlg)
{    
    gpgme_ctx_t ctx;
    gpgme_error_t err;
    passphrase_cb_s pwd;
    char *signer;
    int n = reg_prefs.word_wrap;
    
    signer = get_gnupg_default_key ();
    if (!signer) {
        msg_box (dlg, _("Could not get default key."), _("Signing"), MB_ERR);
        return;
    }
    
    err = gpgme_new (&ctx);
    if (err)
        BUG (dlg);

    set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
    err = gpg_clip_sign (ctx, signer, n);
    if (pwd.cancel)
        goto leave;

    if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE)
        agent_del_cache (pwd.keyid);
    if (err)
        msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
    else
        show_msg (dlg, 1500, _("GnuPG Status: Finished"));
leave:
    gpgme_release (ctx);
    free_if_alloc (signer);
    release_gpg_passphrase_cb (&pwd);
}


/* Count only useable secret keys. 
   Ignore expired, revoked and disabled keys.
   Return value: amount of keys. */
static DWORD
count_useable_seckeys (gpg_keycache_t kc)
{
    struct keycache_s *c;
    DWORD n = 0;

    for (c = kc->item; c; c = c->next) {
        if (c->pubpart && key_is_useable (c->pubpart->key))
            n++;
    }
    return n;
}


static keylist_ctrl_t
on_init_dialog (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    keylist_ctrl_t kl;
    gpg_keycache_t kc, sec_kc;
    int nkeys;

    SetWindowText (dlg, _("Signing"));
    kc = keycache_get_ctx (KEYCACHE_PUB);
    sec_kc = keycache_get_ctx (KEYCACHE_PRV);

    nkeys = count_useable_seckeys (sec_kc);
    if (nkeys < 1) {
        msg_box (dlg, _("No useable signing key found"), _("Signing"), MB_ERR);
        return NULL;
    }
    else if (nkeys == 1) {
        one_key_proc (dlg);
        return NULL;
    }
    kl = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
                        KEYLIST_SIGN, KEY_SORT_USERID);
    center_window (dlg, NULL);
    SetForegroundWindow (dlg);
    return kl;
}


static const char*
lookup_key_userid (const char *patt)
{
    winpt_key_s key;

    memset (&key, 0, sizeof (key));
    if (winpt_get_pubkey (patt, &key))
        return patt;
    return key.ext->uids->uid;
}


/* Dialog box procedure for clipboard signing. */
BOOL CALLBACK 
clip_sign_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{       
    static keylist_ctrl_t kl = NULL;
    gpgme_ctx_t ctx;
    gpgme_error_t err;
    passphrase_cb_s pwd;
    int lv_idx = 0;
    int sel_signer = 0;
    char *signer = NULL;
    
    /* XXX: there seems to be a memory corruption in the code */
    
    switch (msg) {
    case WM_INITDIALOG:
        kl = on_init_dialog (dlg, msg, wparam, lparam);
        if (!kl)
            EndDialog (dlg, TRUE);
        return FALSE;   
        
    case WM_DESTROY:
        if (kl) {
            keylist_delete (kl);
            kl = NULL;
        }
        return FALSE;
        
    case WM_NOTIFY:     
        /* Wait until the dialog initialization is done */
        if (kl == NULL)
            break;
        
        NMHDR *notify;
        notify = (NMHDR *)lparam;
        if (notify && notify->code == NM_DBLCLK &&
            notify->idFrom == IDC_SIGN_KEYLIST)
            PostMessage (dlg, WM_COMMAND, MAKEWPARAM (IDOK, 0), 0);
        
        return FALSE;
        
    case WM_COMMAND:
        switch (LOWORD (wparam)) {
        case IDOK:
            sel_signer = 1;
            signer = get_gnupg_default_key ();
            if (!signer) {
                msg_box (dlg, _("Could not get default key."), _("Signing"), MB_ERR);
                return FALSE;
            }
            else if ((lv_idx = listview_get_selected_item (kl->lv)) == -1) {
                int rc = log_box (_("Signing"), MB_YESNO,
                                  _("No key was chosen.\n"
                                    "Use the GPG default key '%s'?"),
                                  lookup_key_userid (signer));
                if (rc == IDNO) {
                    free_if_alloc (signer);
                    return FALSE;
                }
                sel_signer = 0;
            }
            if (sel_signer) {
                free_if_alloc (signer);
                signer = new char[32+1];
                if (!signer)
                    BUG (NULL);
                listview_get_item_text (kl->lv, lv_idx, KM_COL_KEYID, signer, 32);
            }
            err = gpgme_new (&ctx);
            if (err)
                BUG (NULL);
            set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
            err = gpg_clip_sign (ctx, signer, reg_prefs.word_wrap);
            free_if_alloc (signer);
            release_gpg_passphrase_cb (&pwd);
            gpgme_release (ctx);
            if (pwd.cancel && gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) {
                /* The user hit the cancel button or bad passphrase */          
                return TRUE;
            }
            if (err) {
                msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
                return TRUE;
            }
            else
                show_msg (dlg, 1500, _("GnuPG Status: Finished"));
            EndDialog (dlg, TRUE);
            return TRUE;
            
        case IDCANCEL:
            EndDialog (dlg, FALSE);
            return FALSE;
        }
        break;
    }
    
    return FALSE;
}
1	/* wptClipSignDlg.cpp - WinPT clipboard sign dialog
2	* Copyright (C) 2000-2006, 2009 Timo Schulz
3	* Copyright (C) 2005 g10 Code GmbH
4	*
5	* This file is part of WinPT.
6	*
7	* WinPT is free software; you can redistribute it and/or modify
8	* it under the terms of the GNU General Public License as published by
9	* the Free Software Foundation; either version 2 of the License, or
10	* (at your option) any later version.
11	*
12	* WinPT is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*/
17
18	#ifdef HAVE_CONFIG_H
19	#include <config.h>
20	#endif
21
22	#include <windows.h>
23	#include <commctrl.h>
24
25	#include "resource.h"
26	#include "wptTypes.h"
27	#include "wptAgent.h"
28	#include "wptNLS.h"
29	#include "wptCrypto.h"
30	#include "wptGPG.h"
31	#include "wptCommonCtl.h"
32	#include "wptRegistry.h"
33	#include "wptKeylist.h"
34	#include "wptErrors.h"
35	#include "wptW32API.h"
36	#include "wptVersion.h"
37	#include "wptContext.h" /* for passphrase_s */
38
39
40	/* Sign the clipboard contents with the key @keyid and wrap
41	text lines to @wraplen (0 disable line wrapping).
42	Return value: 0 on success. */
43	gpgme_error_t
44	gpg_clip_sign (gpgme_ctx_t ctx, const char *keyid, int wraplen)
45	{
46	gpgme_error_t err;
47	gpgme_data_t plain = NULL;
48	gpgme_data_t sig = NULL;
49	gpgme_key_t key = NULL;
50
51	if (!keyid)
52	return gpg_error (GPG_ERR_INV_ARG);
53
54	gpgme_set_armor (ctx, 1);
55	err = gpg_data_utf8_new_from_clipboard (&plain, wraplen, NULL);
56	if (err)
57	return err;
58	err = get_pubkey (keyid, &key);
59	if (err)
60	goto leave;
61	err = gpgme_signers_add (ctx, key);
62	if (err)
63	goto leave;
64	err = gpgme_data_new (&sig);
65	if (err)
66	goto leave;
67	err = gpgme_op_sign (ctx, plain, sig, GPGME_SIG_MODE_CLEAR);
68	if (err)
69	goto leave;
70
71	gpg_data_release_to_clipboard (sig, 1);
72	sig = NULL;
73
74	leave:
75	if (plain)
76	gpgme_data_release (plain);
77	if (sig)
78	gpgme_data_release (sig);
79	return err;
80	}
81
82
83	/* This function is used when only one secret key is available.
84	it doesn't make sense to offer a dialog for this case. */
85	void
86	one_key_proc (HWND dlg)
87	{
88	gpgme_ctx_t ctx;
89	gpgme_error_t err;
90	passphrase_cb_s pwd;
91	char *signer;
92	int n = reg_prefs.word_wrap;
93
94	signer = get_gnupg_default_key ();
95	if (!signer) {
96	msg_box (dlg, _("Could not get default key."), _("Signing"), MB_ERR);
97	return;
98	}
99
100	err = gpgme_new (&ctx);
101	if (err)
102	BUG (dlg);
103
104	set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
105	err = gpg_clip_sign (ctx, signer, n);
106	if (pwd.cancel)
107	goto leave;
108
109	if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE)
110	agent_del_cache (pwd.keyid);
111	if (err)
112	msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
113	else
114	show_msg (dlg, 1500, _("GnuPG Status: Finished"));
115	leave:
116	gpgme_release (ctx);
117	free_if_alloc (signer);
118	release_gpg_passphrase_cb (&pwd);
119	}
120
121
122	/* Count only useable secret keys.
123	Ignore expired, revoked and disabled keys.
124	Return value: amount of keys. */
125	static DWORD
126	count_useable_seckeys (gpg_keycache_t kc)
127	{
128	struct keycache_s *c;
129	DWORD n = 0;
130
131	for (c = kc->item; c; c = c->next) {
132	if (c->pubpart && key_is_useable (c->pubpart->key))
133	n++;
134	}
135	return n;
136	}
137
138
139	static keylist_ctrl_t
140	on_init_dialog (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
141	{
142	keylist_ctrl_t kl;
143	gpg_keycache_t kc, sec_kc;
144	int nkeys;
145
146	SetWindowText (dlg, _("Signing"));
147	kc = keycache_get_ctx (KEYCACHE_PUB);
148	sec_kc = keycache_get_ctx (KEYCACHE_PRV);
149
150	nkeys = count_useable_seckeys (sec_kc);
151	if (nkeys < 1) {
152	msg_box (dlg, _("No useable signing key found"), _("Signing"), MB_ERR);
153	return NULL;
154	}
155	else if (nkeys == 1) {
156	one_key_proc (dlg);
157	return NULL;
158	}
159	kl = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
160	KEYLIST_SIGN, KEY_SORT_USERID);
161	center_window (dlg, NULL);
162	SetForegroundWindow (dlg);
163	return kl;
164	}
165
166
167	static const char*
168	lookup_key_userid (const char *patt)
169	{
170	winpt_key_s key;
171
172	memset (&key, 0, sizeof (key));
173	if (winpt_get_pubkey (patt, &key))
174	return patt;
175	return key.ext->uids->uid;
176	}
177
178
179	/* Dialog box procedure for clipboard signing. */
180	BOOL CALLBACK
181	clip_sign_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
182	{
183	static keylist_ctrl_t kl = NULL;
184	gpgme_ctx_t ctx;
185	gpgme_error_t err;
186	passphrase_cb_s pwd;
187	int lv_idx = 0;
188	int sel_signer = 0;
189	char *signer = NULL;
190
191	/* XXX: there seems to be a memory corruption in the code */
192
193	switch (msg) {
194	case WM_INITDIALOG:
195	kl = on_init_dialog (dlg, msg, wparam, lparam);
196	if (!kl)
197	EndDialog (dlg, TRUE);
198	return FALSE;
199
200	case WM_DESTROY:
201	if (kl) {
202	keylist_delete (kl);
203	kl = NULL;
204	}
205	return FALSE;
206
207	case WM_NOTIFY:
208	/* Wait until the dialog initialization is done */
209	if (kl == NULL)
210	break;
211
212	NMHDR *notify;
213	notify = (NMHDR *)lparam;
214	if (notify && notify->code == NM_DBLCLK &&
215	notify->idFrom == IDC_SIGN_KEYLIST)
216	PostMessage (dlg, WM_COMMAND, MAKEWPARAM (IDOK, 0), 0);
217
218	return FALSE;
219
220	case WM_COMMAND:
221	switch (LOWORD (wparam)) {
222	case IDOK:
223	sel_signer = 1;
224	signer = get_gnupg_default_key ();
225	if (!signer) {
226	msg_box (dlg, _("Could not get default key."), _("Signing"), MB_ERR);
227	return FALSE;
228	}
229	else if ((lv_idx = listview_get_selected_item (kl->lv)) == -1) {
230	int rc = log_box (_("Signing"), MB_YESNO,
231	_("No key was chosen.\n"
232	"Use the GPG default key '%s'?"),
233	lookup_key_userid (signer));
234	if (rc == IDNO) {
235	free_if_alloc (signer);
236	return FALSE;
237	}
238	sel_signer = 0;
239	}
240	if (sel_signer) {
241	free_if_alloc (signer);
242	signer = new char[32+1];
243	if (!signer)
244	BUG (NULL);
245	listview_get_item_text (kl->lv, lv_idx, KM_COL_KEYID, signer, 32);
246	}
247	err = gpgme_new (&ctx);
248	if (err)
249	BUG (NULL);
250	set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
251	err = gpg_clip_sign (ctx, signer, reg_prefs.word_wrap);
252	free_if_alloc (signer);
253	release_gpg_passphrase_cb (&pwd);
254	gpgme_release (ctx);
255	if (pwd.cancel && gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) {
256	/* The user hit the cancel button or bad passphrase */
257	return TRUE;
258	}
259	if (err) {
260	msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
261	return TRUE;
262	}
263	else
264	show_msg (dlg, 1500, _("GnuPG Status: Finished"));
265	EndDialog (dlg, TRUE);
266	return TRUE;
267
268	case IDCANCEL:
269	EndDialog (dlg, FALSE);
270	return FALSE;
271	}
272	break;
273	}
274
275	return FALSE;
276	}