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 */


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