trunk/Src/wptClipSignDlg.cpp

/* wptClipSignDlg.cpp - WinPT clipboard sign dialog
 *      Copyright (C) 2000, 2001, 2002, 2003, 2005 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;

    get_pubkey (keyid, &key);
    if (key)
        err = gpgme_signers_add (ctx, key);
    else {
        err = gpg_error (GPG_ERR_NO_PUBKEY);
        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)
{
    char *signer;
    gpgme_ctx_t ctx;
    gpgme_error_t err;
    passphrase_cb_s pwd;
    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;
}


/* Return -1 if no key is selected, the index otherwise. */
static int
get_selected_key (listview_ctrl_t lv)
{
    int i;
    for (i=0; i < listview_count_items (lv, 0); i++) {
        if (listview_get_item_state (lv, i))
            return i;
    }
    return -1;
}


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 = 0;

    SetWindowText (dlg, _("Signing"));
    kc = keycache_get_ctx (KEYCACHE_PUB);
    if (!kc)
        BUG (0);
    sec_kc = keycache_get_ctx (KEYCACHE_PRV);
    if (!sec_kc)
        BUG (0);

    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;
}


/* 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, no_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_SYSCOMMAND:
        if( LOWORD (wparam) == SC_CLOSE )
            EndDialog(dlg, TRUE);
        return FALSE;
        
    case WM_COMMAND:
        switch (LOWORD (wparam)) {
        case IDOK:
            signer = get_gnupg_default_key ();
            if (!signer) {
                msg_box( dlg, _("Could not get default key."), _("Signing"), MB_ERR );
                return FALSE;
            }
            if (listview_count_items (lv, 0) == 1) {
                listview_get_item_text (lv, 0, 1, signer, sizeof signer-1);
                no_signer = 0;
            }
            else if ((lv_idx = get_selected_key (lv)) == -1) {
                rc = log_box (_("Signing"), MB_YESNO,
                              _("No key was chosen.\nUse the GPG default key '%s'?"),
                              signer);
                if (rc == IDNO) {
                    free_if_alloc (signer);
                    return FALSE;
                }
                no_signer = 1;
            }
            if (!no_signer) {
                free_if_alloc (signer);
                signer = new char[32+1];
                if (!signer)
                    BUG (NULL);
                listview_get_item_text (lv, lv_idx, 1, signer, 32);
            }
            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, 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 FALSE;
            }
            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			* Copyright (C) 2000, 2001, 2002, 2003, 2005 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			* 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
61			err = gpg_data_new_from_clipboard (&plain, wraplen);
62			if (err)
63			return err;
64
65			get_pubkey (keyid, &key);
66			if (key)
67			err = gpgme_signers_add (ctx, key);
68			else {
69			err = gpg_error (GPG_ERR_NO_PUBKEY);
70			goto leave;
71			}
72			err = gpgme_data_new (&sig);
73			if (err)
74			goto leave;
75			err = gpgme_op_sign (ctx, plain, sig, GPGME_SIG_MODE_CLEAR);
76			if (err)
77			goto leave;
78
79			gpg_data_release_and_set_clipboard (sig, 1);
80			sig = NULL;
81
82			leave:
83			if (plain)
84			gpgme_data_release (plain);
85			if (sig)
86			gpgme_data_release (sig);
87			return err;
88			}
89
90
91			/* This function is used when only one secret key is available.
92	twoaday	77	it doesn't make sense to offer a dialog for this case. */
93	werner	36	void
94			one_key_proc (HWND dlg)
95			{
96	twoaday	77	char *signer;
97	werner	36	gpgme_ctx_t ctx;
98			gpgme_error_t err;
99			passphrase_cb_s pwd;
100			int n = reg_prefs.word_wrap;
101
102			signer = get_gnupg_default_key ();
103			if (!signer) {
104			msg_box (dlg, _("Could not get default key."), _("Signing"), MB_ERR);
105			return;
106			}
107
108			err = gpgme_new (&ctx);
109			if (err)
110			BUG (dlg);
111
112			set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
113	twoaday	77	err = gpg_clip_sign (ctx, signer, n);
114	twoaday	175	if (pwd.cancel)
115			goto leave;
116
117	werner	36	if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE)
118			agent_del_cache (pwd.keyid);
119			if (err)
120			msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
121			else
122			show_msg (dlg, 1500, _("GnuPG Status: Finished"));
123	twoaday	175	leave:
124	werner	36	gpgme_release (ctx);
125			free_if_alloc (signer);
126	twoaday	77	release_gpg_passphrase_cb (&pwd);
127	werner	36	}
128
129
130	twoaday	175	/* Count only useable secret keys.
131			Ignore expired, revoked and disabled keys.
132			Return value: amount of keys. */
133			static DWORD
134			count_useable_seckeys (gpg_keycache_t kc)
135			{
136			struct keycache_s *c;
137			DWORD n=0;
138
139			for (c = kc->item; c; c=c->next) {
140			if (c->pubpart && key_is_useable (c->pubpart->key))
141			n++;
142			}
143			return n;
144			}
145
146
147			/* Return -1 if no key is selected, the index otherwise. */
148			static int
149			get_selected_key (listview_ctrl_t lv)
150			{
151			int i;
152			for (i=0; i < listview_count_items (lv, 0); i++) {
153			if (listview_get_item_state (lv, i))
154			return i;
155			}
156			return -1;
157			}
158
159
160	twoaday	188	static listview_ctrl_t
161			on_init_dialog (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
162			{
163			listview_ctrl_t lv;
164			gpg_keycache_t kc, sec_kc;
165			int nkeys = 0;
166
167			SetWindowText (dlg, _("Signing"));
168			kc = keycache_get_ctx (KEYCACHE_PUB);
169			if (!kc)
170			BUG (0);
171			sec_kc = keycache_get_ctx (KEYCACHE_PRV);
172			if (!sec_kc)
173			BUG (0);
174
175			nkeys = count_useable_seckeys (sec_kc);
176			if (nkeys < 1) {
177			msg_box (dlg, _("No useable signing key found"), _("Signing"), MB_ERR);
178			return NULL;
179			}
180			else if (nkeys == 1) {
181			one_key_proc (dlg);
182			return NULL;
183			}
184			lv = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
185			KEYLIST_SIGN, KEY_SORT_USERID);
186			center_window (dlg, NULL);
187			SetForegroundWindow (dlg);
188			return lv;
189			}
190
191
192	werner	36	/* Dialog box procedure for clipboard signing. */
193			BOOL CALLBACK
194			clip_sign_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
195			{
196	twoaday	188	static listview_ctrl_t lv = NULL;
197	werner	36	gpgme_ctx_t ctx;
198			gpgme_error_t err;
199			passphrase_cb_s pwd;
200			int lv_idx = 0;
201			int rc = 0, no_signer = 0;
202	twoaday	175	char *signer = NULL;
203	werner	36
204	twoaday	188	switch (msg) {
205	werner	36	case WM_INITDIALOG:
206	twoaday	188	lv = on_init_dialog (dlg, msg, wparam, lparam);
207			if (!lv)
208			EndDialog (dlg, TRUE);
209	werner	36	return FALSE;
210
211			case WM_DESTROY:
212			if (lv) {
213			keylist_delete (lv);
214			lv = NULL;
215			}
216			return FALSE;
217
218			case WM_NOTIFY:
219			NMHDR * notify;
220			notify = (NMHDR *)lparam;
221			if( notify && notify->code == NM_DBLCLK
222			&& notify->idFrom == IDC_SIGN_KEYLIST )
223	twoaday	65	PostMessage (dlg, WM_COMMAND, MAKEWPARAM(IDOK, 0), 0);
224	werner	36	return TRUE;
225
226			case WM_SYSCOMMAND:
227			if( LOWORD (wparam) == SC_CLOSE )
228			EndDialog(dlg, TRUE);
229			return FALSE;
230
231			case WM_COMMAND:
232			switch (LOWORD (wparam)) {
233			case IDOK:
234			signer = get_gnupg_default_key ();
235			if (!signer) {
236			msg_box( dlg, _("Could not get default key."), _("Signing"), MB_ERR );
237			return FALSE;
238			}
239			if (listview_count_items (lv, 0) == 1) {
240			listview_get_item_text (lv, 0, 1, signer, sizeof signer-1);
241			no_signer = 0;
242			}
243	twoaday	175	else if ((lv_idx = get_selected_key (lv)) == -1) {
244	werner	36	rc = log_box (_("Signing"), MB_YESNO,
245			_("No key was chosen.\nUse the GPG default key '%s'?"),
246			signer);
247			if (rc == IDNO) {
248			free_if_alloc (signer);
249			return FALSE;
250			}
251			no_signer = 1;
252			}
253			if (!no_signer) {
254			free_if_alloc (signer);
255			signer = new char[32+1];
256			if (!signer)
257			BUG (NULL);
258			listview_get_item_text (lv, lv_idx, 1, signer, 32);
259			}
260			err = gpgme_new (&ctx);
261			if (err)
262			BUG (dlg);
263			set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
264			err = gpg_clip_sign (ctx, signer, reg_prefs.word_wrap);
265			free_if_alloc (signer);
266			release_gpg_passphrase_cb (&pwd);
267
268			if (pwd.cancel && gpgme_err_code(err) == GPG_ERR_BAD_PASSPHRASE) {
269			/* The user hit the cancel button or bad passphrase */
270			gpgme_release (ctx);
271			return TRUE;
272			}
273			if (err) {
274			msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
275			gpgme_release (ctx);
276			return FALSE;
277			}
278			else
279			show_msg( dlg, 1500, _("GnuPG Status: Finished") );
280			gpgme_release (ctx);
281			EndDialog (dlg, TRUE);
282			return TRUE;
283
284			case IDCANCEL:
285			EndDialog (dlg, FALSE);
286			return FALSE;
287			}
288			break;
289			}
290
291			return FALSE;
292			}