trunk/Src/wptClipSignDlg.cpp

/* wptClipSignDlg.cpp - WinPT clipboard sign dialog
 *      Copyright (C) 2000-2006 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.
 *
 * 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 <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 */
#include "wptDlgs.h"


/* 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_new_from_clipboard (&plain, wraplen);
    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_and_set_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 listview_ctrl_t
on_init_dialog (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    listview_ctrl_t lv;
    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;
    }
    lv = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
                        KEYLIST_SIGN, KEY_SORT_USERID);
    center_window (dlg, NULL);
    SetForegroundWindow (dlg);
    return lv;
}


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 listview_ctrl_t lv = NULL;    
    gpgme_ctx_t ctx;
    gpgme_error_t err;
    passphrase_cb_s pwd;
    int lv_idx = 0;
    int rc = 0, sel_signer = 0;
    char *signer = NULL;
    
    switch (msg) {
    case WM_INITDIALOG:
        lv = on_init_dialog (dlg, msg, wparam, lparam);
        if (!lv)
            EndDialog (dlg, TRUE);
        return FALSE;   
        
    case WM_DESTROY:
        if (lv) {
            keylist_delete (lv);
            lv = NULL;
        }
        return FALSE;
        
    case WM_NOTIFY:
        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 TRUE;
        
    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 (lv)) == -1) {
                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 (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);

            if (pwd.cancel && gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) {
                /* The user hit the cancel button or bad passphrase */
                gpgme_release (ctx);
                return TRUE;
            }
            if (err) {
                msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
                gpgme_release (ctx);
                return TRUE;
            }
            else
                show_msg (dlg, 1500, _("GnuPG Status: Finished"));
            gpgme_release (ctx);
            EndDialog (dlg, TRUE);
            return TRUE;
            
        case IDCANCEL:
            EndDialog (dlg, FALSE);
            return FALSE;
        }
        break;
    }
    
    return FALSE;
}
1	werner	36	/* wptClipSignDlg.cpp - WinPT clipboard sign dialog
2	twoaday	256	* Copyright (C) 2000-2006 Timo Schulz
3	werner	36	* 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			* You should have received a copy of the GNU General Public License
18			* along with WinPT; if not, write to the Free Software Foundation,
19			* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
20			*/
21	twoaday	23
22	werner	36	#ifdef HAVE_CONFIG_H
23			#include <config.h>
24			#endif
25
26			#include <windows.h>
27			#include <commctrl.h>
28
29	werner	47	#include "resource.h"
30	werner	36	#include "wptTypes.h"
31			#include "wptAgent.h"
32			#include "wptNLS.h"
33			#include "wptCrypto.h"
34			#include "wptGPG.h"
35			#include "wptCommonCtl.h"
36			#include "wptRegistry.h"
37			#include "wptKeylist.h"
38			#include "wptErrors.h"
39			#include "wptW32API.h"
40			#include "wptVersion.h"
41			#include "wptContext.h" /* for passphrase_s */
42			#include "wptDlgs.h"
43
44
45			/* Sign the clipboard contents with the key @keyid and wrap
46			text lines to @wraplen (0 disable line wrapping).
47			Return value: 0 on success. */
48			gpgme_error_t
49			gpg_clip_sign (gpgme_ctx_t ctx, const char *keyid, int wraplen)
50			{
51			gpgme_error_t err;
52			gpgme_data_t plain = NULL;
53			gpgme_data_t sig = NULL;
54			gpgme_key_t key = NULL;
55
56			if (!keyid)
57			return gpg_error (GPG_ERR_INV_ARG);
58
59			gpgme_set_armor (ctx, 1);
60			err = gpg_data_new_from_clipboard (&plain, wraplen);
61			if (err)
62			return err;
63	twoaday	212	err = get_pubkey (keyid, &key);
64			if (err)
65	werner	36	goto leave;
66	twoaday	212	err = gpgme_signers_add (ctx, key);
67			if (err)
68			goto leave;
69	werner	36	err = gpgme_data_new (&sig);
70			if (err)
71	twoaday	256	goto leave;
72	werner	36	err = gpgme_op_sign (ctx, plain, sig, GPGME_SIG_MODE_CLEAR);
73			if (err)
74			goto leave;
75
76			gpg_data_release_and_set_clipboard (sig, 1);
77			sig = NULL;
78
79			leave:
80			if (plain)
81			gpgme_data_release (plain);
82			if (sig)
83			gpgme_data_release (sig);
84			return err;
85			}
86
87
88			/* This function is used when only one secret key is available.
89	twoaday	77	it doesn't make sense to offer a dialog for this case. */
90	werner	36	void
91			one_key_proc (HWND dlg)
92	twoaday	256	{
93	werner	36	gpgme_ctx_t ctx;
94			gpgme_error_t err;
95			passphrase_cb_s pwd;
96	twoaday	256	char *signer;
97	werner	36	int n = reg_prefs.word_wrap;
98
99			signer = get_gnupg_default_key ();
100			if (!signer) {
101			msg_box (dlg, _("Could not get default key."), _("Signing"), MB_ERR);
102			return;
103			}
104
105			err = gpgme_new (&ctx);
106			if (err)
107			BUG (dlg);
108
109			set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
110	twoaday	77	err = gpg_clip_sign (ctx, signer, n);
111	twoaday	175	if (pwd.cancel)
112			goto leave;
113
114	werner	36	if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE)
115			agent_del_cache (pwd.keyid);
116			if (err)
117			msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
118			else
119			show_msg (dlg, 1500, _("GnuPG Status: Finished"));
120	twoaday	175	leave:
121	werner	36	gpgme_release (ctx);
122			free_if_alloc (signer);
123	twoaday	77	release_gpg_passphrase_cb (&pwd);
124	werner	36	}
125
126
127	twoaday	175	/* Count only useable secret keys.
128			Ignore expired, revoked and disabled keys.
129			Return value: amount of keys. */
130			static DWORD
131			count_useable_seckeys (gpg_keycache_t kc)
132			{
133			struct keycache_s *c;
134			DWORD n=0;
135
136			for (c = kc->item; c; c=c->next) {
137			if (c->pubpart && key_is_useable (c->pubpart->key))
138			n++;
139			}
140			return n;
141			}
142
143
144	twoaday	188	static listview_ctrl_t
145			on_init_dialog (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
146			{
147			listview_ctrl_t lv;
148			gpg_keycache_t kc, sec_kc;
149	twoaday	225	int nkeys;
150	twoaday	188
151			SetWindowText (dlg, _("Signing"));
152			kc = keycache_get_ctx (KEYCACHE_PUB);
153			sec_kc = keycache_get_ctx (KEYCACHE_PRV);
154
155			nkeys = count_useable_seckeys (sec_kc);
156			if (nkeys < 1) {
157			msg_box (dlg, _("No useable signing key found"), _("Signing"), MB_ERR);
158			return NULL;
159			}
160			else if (nkeys == 1) {
161			one_key_proc (dlg);
162			return NULL;
163			}
164			lv = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
165			KEYLIST_SIGN, KEY_SORT_USERID);
166			center_window (dlg, NULL);
167			SetForegroundWindow (dlg);
168			return lv;
169			}
170
171
172	twoaday	225	static const char*
173			lookup_key_userid (const char *patt)
174			{
175			winpt_key_s key;
176
177			memset (&key, 0, sizeof (key));
178			if (winpt_get_pubkey (patt, &key))
179			return patt;
180			return key.ext->uids->uid;
181			}
182
183
184	werner	36	/* Dialog box procedure for clipboard signing. */
185			BOOL CALLBACK
186			clip_sign_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
187			{
188	twoaday	188	static listview_ctrl_t lv = NULL;
189	werner	36	gpgme_ctx_t ctx;
190			gpgme_error_t err;
191			passphrase_cb_s pwd;
192			int lv_idx = 0;
193	twoaday	225	int rc = 0, sel_signer = 0;
194	twoaday	175	char *signer = NULL;
195	werner	36
196	twoaday	188	switch (msg) {
197	werner	36	case WM_INITDIALOG:
198	twoaday	188	lv = on_init_dialog (dlg, msg, wparam, lparam);
199			if (!lv)
200			EndDialog (dlg, TRUE);
201	werner	36	return FALSE;
202
203			case WM_DESTROY:
204			if (lv) {
205			keylist_delete (lv);
206			lv = NULL;
207			}
208			return FALSE;
209
210			case WM_NOTIFY:
211	twoaday	225	NMHDR *notify;
212	werner	36	notify = (NMHDR *)lparam;
213	twoaday	225	if (notify && notify->code == NM_DBLCLK
214			&& notify->idFrom == IDC_SIGN_KEYLIST)
215			PostMessage (dlg, WM_COMMAND, MAKEWPARAM (IDOK, 0), 0);
216	werner	36	return TRUE;
217
218			case WM_COMMAND:
219			switch (LOWORD (wparam)) {
220			case IDOK:
221	twoaday	225	sel_signer = 1;
222	werner	36	signer = get_gnupg_default_key ();
223			if (!signer) {
224	twoaday	225	msg_box (dlg, _("Could not get default key."),
225			_("Signing"), MB_ERR);
226	werner	36	return FALSE;
227			}
228	twoaday	193	else if ((lv_idx = listview_get_selected_item (lv)) == -1) {
229	werner	36	rc = log_box (_("Signing"), MB_YESNO,
230	twoaday	225	_("No key was chosen.\n"
231			"Use the GPG default key '%s'?"),
232			lookup_key_userid (signer));
233	werner	36	if (rc == IDNO) {
234			free_if_alloc (signer);
235			return FALSE;
236			}
237	twoaday	225	sel_signer = 0;
238	werner	36	}
239	twoaday	225	if (sel_signer) {
240	werner	36	free_if_alloc (signer);
241			signer = new char[32+1];
242			if (!signer)
243			BUG (NULL);
244	twoaday	225	listview_get_item_text (lv, lv_idx, KM_COL_KEYID, signer, 32);
245	werner	36	}
246			err = gpgme_new (&ctx);
247			if (err)
248	twoaday	225	BUG (NULL);
249	werner	36	set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
250			err = gpg_clip_sign (ctx, signer, reg_prefs.word_wrap);
251			free_if_alloc (signer);
252			release_gpg_passphrase_cb (&pwd);
253
254	twoaday	256	if (pwd.cancel && gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) {
255	werner	36	/* The user hit the cancel button or bad passphrase */
256			gpgme_release (ctx);
257			return TRUE;
258			}
259			if (err) {
260			msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
261			gpgme_release (ctx);
262	twoaday	225	return TRUE;
263	werner	36	}
264	twoaday	225	else
265			show_msg (dlg, 1500, _("GnuPG Status: Finished"));
266	werner	36	gpgme_release (ctx);
267			EndDialog (dlg, TRUE);
268			return TRUE;
269
270			case IDCANCEL:
271			EndDialog (dlg, FALSE);
272			return FALSE;
273			}
274			break;
275			}
276
277			return FALSE;
278			}