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;
}


/* 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;
    gpg_keycache_t kc, sec_kc;
    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:
        SetWindowText (dlg, _("Signing"));

        kc = keycache_get_ctx (KEYCACHE_PUB);
        if (!kc)
            BUG( NULL );
        sec_kc = keycache_get_ctx (KEYCACHE_PRV);
        if (!sec_kc)
            BUG (dlg);
        if (count_useable_seckeys (sec_kc) == 1) {
            one_key_proc (dlg);
            EndDialog (dlg, TRUE);
            return FALSE;
        }
        lv = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
                           KEYLIST_SIGN, KEY_SORT_USERID);
        center_window (dlg, NULL);
        SetForegroundWindow (dlg);
        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	werner	36	/* Dialog box procedure for clipboard signing. */
161			BOOL CALLBACK
162			clip_sign_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
163			{
164			static listview_ctrl_t lv = NULL;
165			gpg_keycache_t kc, sec_kc;
166			gpgme_ctx_t ctx;
167			gpgme_error_t err;
168			passphrase_cb_s pwd;
169			int lv_idx = 0;
170			int rc = 0, no_signer = 0;
171	twoaday	175	char *signer = NULL;
172	werner	36
173			switch( msg ) {
174			case WM_INITDIALOG:
175			SetWindowText (dlg, _("Signing"));
176
177			kc = keycache_get_ctx (KEYCACHE_PUB);
178			if (!kc)
179			BUG( NULL );
180			sec_kc = keycache_get_ctx (KEYCACHE_PRV);
181			if (!sec_kc)
182			BUG (dlg);
183	twoaday	175	if (count_useable_seckeys (sec_kc) == 1) {
184	werner	36	one_key_proc (dlg);
185			EndDialog (dlg, TRUE);
186			return FALSE;
187			}
188			lv = keylist_load (GetDlgItem (dlg, IDC_SIGN_KEYLIST), kc, sec_kc,
189			KEYLIST_SIGN, KEY_SORT_USERID);
190			center_window (dlg, NULL);
191			SetForegroundWindow (dlg);
192			return FALSE;
193
194			case WM_DESTROY:
195			if (lv) {
196			keylist_delete (lv);
197			lv = NULL;
198			}
199			return FALSE;
200
201			case WM_NOTIFY:
202			NMHDR * notify;
203			notify = (NMHDR *)lparam;
204			if( notify && notify->code == NM_DBLCLK
205			&& notify->idFrom == IDC_SIGN_KEYLIST )
206	twoaday	65	PostMessage (dlg, WM_COMMAND, MAKEWPARAM(IDOK, 0), 0);
207	werner	36	return TRUE;
208
209			case WM_SYSCOMMAND:
210			if( LOWORD (wparam) == SC_CLOSE )
211			EndDialog(dlg, TRUE);
212			return FALSE;
213
214			case WM_COMMAND:
215			switch (LOWORD (wparam)) {
216			case IDOK:
217			signer = get_gnupg_default_key ();
218			if (!signer) {
219			msg_box( dlg, _("Could not get default key."), _("Signing"), MB_ERR );
220			return FALSE;
221			}
222			if (listview_count_items (lv, 0) == 1) {
223			listview_get_item_text (lv, 0, 1, signer, sizeof signer-1);
224			no_signer = 0;
225			}
226	twoaday	175	else if ((lv_idx = get_selected_key (lv)) == -1) {
227	werner	36	rc = log_box (_("Signing"), MB_YESNO,
228			_("No key was chosen.\nUse the GPG default key '%s'?"),
229			signer);
230			if (rc == IDNO) {
231			free_if_alloc (signer);
232			return FALSE;
233			}
234			no_signer = 1;
235			}
236			if (!no_signer) {
237			free_if_alloc (signer);
238			signer = new char[32+1];
239			if (!signer)
240			BUG (NULL);
241			listview_get_item_text (lv, lv_idx, 1, signer, 32);
242			}
243			err = gpgme_new (&ctx);
244			if (err)
245			BUG (dlg);
246			set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_SIGN, dlg, _("Signing"));
247			err = gpg_clip_sign (ctx, signer, reg_prefs.word_wrap);
248			free_if_alloc (signer);
249			release_gpg_passphrase_cb (&pwd);
250
251			if (pwd.cancel && gpgme_err_code(err) == GPG_ERR_BAD_PASSPHRASE) {
252			/* The user hit the cancel button or bad passphrase */
253			gpgme_release (ctx);
254			return TRUE;
255			}
256			if (err) {
257			msg_box (dlg, gpgme_strerror (err), _("Signing"), MB_ERR);
258			gpgme_release (ctx);
259			return FALSE;
260			}
261			else
262			show_msg( dlg, 1500, _("GnuPG Status: Finished") );
263			gpgme_release (ctx);
264			EndDialog (dlg, TRUE);
265			return TRUE;
266
267			case IDCANCEL:
268			EndDialog (dlg, FALSE);
269			return FALSE;
270			}
271			break;
272			}
273
274			return FALSE;
275			}