trunk/Src/wptClipVerifyDlg.cpp

/* wptClipVerifyDlg.cpp - WinPT verify dialog
 *      Copyright (C) 2001-2005 Timo Schulz
 *
 * 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 <time.h>

#include "resource.h"
#include "wptGPG.h"
#include "wptTypes.h"
#include "wptCommonCtl.h"
#include "wptKeylist.h"
#include "wptW32API.h"
#include "wptKeyserver.h"
#include "wptNLS.h"
#include "wptContext.h" /* for passwd_s */
#include "wptDlgs.h"
#include "wptErrors.h"
#include "wptVersion.h"

/* XXX use out directly and do not use gpg_data_extract to store the plain text. */


/* Verify data from the clipboard. If @is_detached is set, a detached
   signature is assumed with the data the signature was calculated over
   in @det_data. The context is returned in @r_ctx and the signature
   in @r_sig.
   Return value: 0 on success. */
gpgme_error_t
gpg_clip_verify (int is_detached,
                 const char *det_data, size_t det_len,
                 gpgme_ctx_t *r_ctx,
                 gpgme_signature_t *r_sig)
{
    gpgme_error_t err;
    gpgme_ctx_t ctx;
    gpgme_data_t dat = NULL;
    gpgme_data_t out = NULL;
    gpgme_data_t sig = NULL;
    gpgme_verify_result_t res;

    if (is_detached) {
        err = gpgme_data_new_from_mem (&dat, det_data, det_len, 1);
        if (err)
            return err;
    }
    
    err = gpgme_new (&ctx);
    if (err)
        goto leave;
    err = gpg_data_new_from_clipboard (&sig, 0);
    if (err)
        goto leave;
    err = gpgme_data_new (&out);
    if (err)
        goto leave;
    
    err = gpgme_op_verify (ctx, sig, dat, out);
    if (err)
        goto leave;
    res = gpgme_op_verify_result (ctx);
    if (!res || !res->signatures) {
        err = gpg_error (GPG_ERR_NO_DATA);
        goto leave;
    }
    *r_sig = res->signatures;
    *r_ctx = ctx;

leave:
    if (err) {
        gpgme_release (ctx);
        *r_ctx = NULL;
    }
    if (dat)
        gpgme_data_release (dat);
    if (out)
        gpgme_data_release (out);
    gpgme_data_release (sig);
    return err;
}


/* Display the policy URL and the notation data of a signature.
   If @not is NULL, it is assumed there is no data. 
   @dlg is the handle to the calling dialog. */
static void
show_notation_data (HWND dlg, gpgme_sig_notation_t nota)
{
    gpgme_sig_notation_t n;
    size_t len=0;
    char *p;

    for (n=nota; n; n = n->next) {
        if (n->name)
            len += strlen (n->name) + 1 + 2;
        else
            len += strlen ("policy URL") + 1 + 2;
        len += strlen (n->value) + 1 + 2;
        len += 6;
    }
    p = (char *)calloc (1, len+64);
    if (!p)
        BUG (NULL);
    strcpy (p, "Notation data:\n");
    for (n=nota; n; n = n->next) {
        if (!n->name)
            strcat (p, "policy url: ");
        else {
            strcat (p, n->name);
            strcat (p, " : ");
        }
        strcat (p, "\"");
        strcat (p, n->value);
        strcat (p, "\"\n");
    }

    msg_box (dlg, p, _("Signature Information"), MB_INFO);
    free (p);
}


/* Dialog procedure for the clipboard verification. */
BOOL CALLBACK
clip_verify_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    static listview_ctrl_t lv = NULL;
    static text_input_s *ctx = NULL;
    gpgme_error_t err;
    gpgme_signature_t sig = NULL, s;
    gpg_keycache_t kc = NULL;
    gpgme_ctx_t c=NULL;
    const char *det_data=NULL;
    u16 port = HKP_PORT;
    int rc = 0, det_len=0;
    
    switch( msg ) {
    case WM_INITDIALOG:
    #ifndef LANG_DE
        SetWindowText (dlg, _("Verify"));
    #endif
        kc = keycache_get_ctx (KEYCACHE_PUB);
        if (!kc)
            BUG (NULL);
        ctx = (text_input_s *)lparam;
        if (ctx) {
            det_data = ctx->data;
            det_len = ctx->length;
        }
        err = gpg_clip_verify (ctx && ctx->length > 0, 
                               det_data, det_len, &c, &sig);
        if (err) {
            msg_box (dlg, gpgme_strerror (err), _("Verify"), MB_ERR);
            if (c)
                gpgme_release (c);
            EndDialog (dlg, FALSE);
            return FALSE;
        }

        if (gpgme_err_code (sig->status) == GPG_ERR_NO_PUBKEY) {
            const char *keyid;
            const char *kserv;
            if (!sig->fpr)
                BUG (NULL);
            if (strlen (sig->fpr) == 40)
                keyid = sig->fpr+24;
            else
                keyid = sig->fpr+16;
            rc = log_box (_("Verify"), MB_INFO|MB_YESNO,
                          _("Signature made %s using %s key ID 0x%s\n"
                          "Cannot check signature: public key not found\n\n"
                          "Do you want to try to retrieve the key from the keyserver?"),
                          strtimestamp (sig->timestamp),
                          get_key_pubalgo (sig->pubkey_algo), keyid+8);
            if (rc == IDNO) {
                msg_box (dlg, gpg_sigstat[GPGME_SIG_STAT_NOKEY], _("Verify"), MB_WARN);
                gpgme_release (c);
                EndDialog (dlg, FALSE);
                return FALSE;
            }
            if (0) {
            /* FIXME: does GPGME include the keyserver status
            kserv = gpgme_sig_get_string_attr (sig, GPGME_ATTR_KEYSERVER);
            if (kserv && strncmp (kserv, "hkp://", 6)) {
                rc = log_box (_("Verify"), MB_INFO|MB_YESNO,
                              _("The users preferred keyserver is '%s'.\n"
                                "Do you want to use it to fetch the key?"), kserv);
                if (rc == IDNO) {
                    kserv = default_keyserver;
                    port = default_keyserver_port;
                }*/
            }
            else {
                kserv = default_keyserver;
                port = default_keyserver_port;
            }
            if (!hkp_recv_key (dlg, kserv, port, keyid+8, 0, 0)) {
                keycache_reload (dlg);
                kc = keycache_get_ctx (KEYCACHE_PUB);
                if (!kc)
                    BUG (dlg);
            }
        }
        else if (gpgme_err_code (sig->status) == GPG_ERR_BAD_SIGNATURE && 
                 !sig->timestamp)
                 ;
        else if (!sig->timestamp) {
            msg_box (dlg, _("Invalid signature state."), _("Verify"), MB_ERR);
            gpgme_release (c);
            EndDialog (dlg, FALSE);
            return FALSE;
        }
        verlist_build (&lv, GetDlgItem (dlg, IDC_VERIFY_SIGLIST), 0);

        for (s = sig; s; s = s->next) {
            rc = verlist_add_sig (lv, s);
            if (rc)
                msg_box (dlg, _("Could not extract key or signature information."), 
                         _("Verify"), MB_ERR);
        }
        if (sig->exp_timestamp > (DWORD)time (NULL))
            SetDlgItemText( dlg, IDC_VERIFY_INFO, _("The signature is expired!") );
        if (sig->notations)
            show_notation_data (dlg, sig->notations);
        gpgme_release (c);
        SetForegroundWindow (dlg);
        set_active_window (dlg);
        return TRUE;
        
    case WM_DESTROY:
        reset_active_window ();
        if (lv) {
            listview_release (lv);
            lv = NULL;
        }
        return FALSE;
        
    case WM_SYSCOMMAND:
        if (LOWORD (wparam) == SC_CLOSE)
            EndDialog (dlg, TRUE);
        return FALSE;
        
    case WM_COMMAND:
        switch (LOWORD (wparam )) {
        case IDOK:
            EndDialog (dlg, TRUE);
            return FALSE;
            
        case IDC_VERIFY_SAVE:
            dialog_box_param (glob_hinst, (LPCTSTR)IDD_WINPT_FILE_SAVE, dlg,
                              file_save_dlg_proc, 0, _("Save Plaintext"), 
                              IDS_WINPT_FILE_SAVE);
            break;
        }
        break;
    }
    
    return FALSE;
}

1	/* wptClipVerifyDlg.cpp - WinPT verify dialog
2	* Copyright (C) 2001-2005 Timo Schulz
3	*
4	* This file is part of WinPT.
5	*
6	* WinPT is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* WinPT is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with WinPT; if not, write to the Free Software Foundation,
18	* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19	*/
20
21	#ifdef HAVE_CONFIG_H
22	#include <config.h>
23	#endif
24
25	#include <windows.h>
26	#include <time.h>
27
28	#include "resource.h"
29	#include "wptGPG.h"
30	#include "wptTypes.h"
31	#include "wptCommonCtl.h"
32	#include "wptKeylist.h"
33	#include "wptW32API.h"
34	#include "wptKeyserver.h"
35	#include "wptNLS.h"
36	#include "wptContext.h" /* for passwd_s */
37	#include "wptDlgs.h"
38	#include "wptErrors.h"
39	#include "wptVersion.h"
40
41	/* XXX use out directly and do not use gpg_data_extract to store the plain text. */
42
43
44	/* Verify data from the clipboard. If @is_detached is set, a detached
45	signature is assumed with the data the signature was calculated over
46	in @det_data. The context is returned in @r_ctx and the signature
47	in @r_sig.
48	Return value: 0 on success. */
49	gpgme_error_t
50	gpg_clip_verify (int is_detached,
51	const char *det_data, size_t det_len,
52	gpgme_ctx_t *r_ctx,
53	gpgme_signature_t *r_sig)
54	{
55	gpgme_error_t err;
56	gpgme_ctx_t ctx;
57	gpgme_data_t dat = NULL;
58	gpgme_data_t out = NULL;
59	gpgme_data_t sig = NULL;
60	gpgme_verify_result_t res;
61
62	if (is_detached) {
63	err = gpgme_data_new_from_mem (&dat, det_data, det_len, 1);
64	if (err)
65	return err;
66	}
67
68	err = gpgme_new (&ctx);
69	if (err)
70	goto leave;
71	err = gpg_data_new_from_clipboard (&sig, 0);
72	if (err)
73	goto leave;
74	err = gpgme_data_new (&out);
75	if (err)
76	goto leave;
77
78	err = gpgme_op_verify (ctx, sig, dat, out);
79	if (err)
80	goto leave;
81	res = gpgme_op_verify_result (ctx);
82	if (!res \|\| !res->signatures) {
83	err = gpg_error (GPG_ERR_NO_DATA);
84	goto leave;
85	}
86	*r_sig = res->signatures;
87	*r_ctx = ctx;
88
89	leave:
90	if (err) {
91	gpgme_release (ctx);
92	*r_ctx = NULL;
93	}
94	if (dat)
95	gpgme_data_release (dat);
96	if (out)
97	gpgme_data_release (out);
98	gpgme_data_release (sig);
99	return err;
100	}
101
102
103	/* Display the policy URL and the notation data of a signature.
104	If @not is NULL, it is assumed there is no data.
105	@dlg is the handle to the calling dialog. */
106	static void
107	show_notation_data (HWND dlg, gpgme_sig_notation_t nota)
108	{
109	gpgme_sig_notation_t n;
110	size_t len=0;
111	char *p;
112
113	for (n=nota; n; n = n->next) {
114	if (n->name)
115	len += strlen (n->name) + 1 + 2;
116	else
117	len += strlen ("policy URL") + 1 + 2;
118	len += strlen (n->value) + 1 + 2;
119	len += 6;
120	}
121	p = (char *)calloc (1, len+64);
122	if (!p)
123	BUG (NULL);
124	strcpy (p, "Notation data:\n");
125	for (n=nota; n; n = n->next) {
126	if (!n->name)
127	strcat (p, "policy url: ");
128	else {
129	strcat (p, n->name);
130	strcat (p, " : ");
131	}
132	strcat (p, "\"");
133	strcat (p, n->value);
134	strcat (p, "\"\n");
135	}
136
137	msg_box (dlg, p, _("Signature Information"), MB_INFO);
138	free (p);
139	}
140
141
142	/* Dialog procedure for the clipboard verification. */
143	BOOL CALLBACK
144	clip_verify_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
145	{
146	static listview_ctrl_t lv = NULL;
147	static text_input_s *ctx = NULL;
148	gpgme_error_t err;
149	gpgme_signature_t sig = NULL, s;
150	gpg_keycache_t kc = NULL;
151	gpgme_ctx_t c=NULL;
152	const char *det_data=NULL;
153	u16 port = HKP_PORT;
154	int rc = 0, det_len=0;
155
156	switch( msg ) {
157	case WM_INITDIALOG:
158	#ifndef LANG_DE
159	SetWindowText (dlg, _("Verify"));
160	#endif
161	kc = keycache_get_ctx (KEYCACHE_PUB);
162	if (!kc)
163	BUG (NULL);
164	ctx = (text_input_s *)lparam;
165	if (ctx) {
166	det_data = ctx->data;
167	det_len = ctx->length;
168	}
169	err = gpg_clip_verify (ctx && ctx->length > 0,
170	det_data, det_len, &c, &sig);
171	if (err) {
172	msg_box (dlg, gpgme_strerror (err), _("Verify"), MB_ERR);
173	if (c)
174	gpgme_release (c);
175	EndDialog (dlg, FALSE);
176	return FALSE;
177	}
178
179	if (gpgme_err_code (sig->status) == GPG_ERR_NO_PUBKEY) {
180	const char *keyid;
181	const char *kserv;
182	if (!sig->fpr)
183	BUG (NULL);
184	if (strlen (sig->fpr) == 40)
185	keyid = sig->fpr+24;
186	else
187	keyid = sig->fpr+16;
188	rc = log_box (_("Verify"), MB_INFO\|MB_YESNO,
189	_("Signature made %s using %s key ID 0x%s\n"
190	"Cannot check signature: public key not found\n\n"
191	"Do you want to try to retrieve the key from the keyserver?"),
192	strtimestamp (sig->timestamp),
193	get_key_pubalgo (sig->pubkey_algo), keyid+8);
194	if (rc == IDNO) {
195	msg_box (dlg, gpg_sigstat[GPGME_SIG_STAT_NOKEY], _("Verify"), MB_WARN);
196	gpgme_release (c);
197	EndDialog (dlg, FALSE);
198	return FALSE;
199	}
200	if (0) {
201	/* FIXME: does GPGME include the keyserver status
202	kserv = gpgme_sig_get_string_attr (sig, GPGME_ATTR_KEYSERVER);
203	if (kserv && strncmp (kserv, "hkp://", 6)) {
204	rc = log_box (_("Verify"), MB_INFO\|MB_YESNO,
205	_("The users preferred keyserver is '%s'.\n"
206	"Do you want to use it to fetch the key?"), kserv);
207	if (rc == IDNO) {
208	kserv = default_keyserver;
209	port = default_keyserver_port;
210	}*/
211	}
212	else {
213	kserv = default_keyserver;
214	port = default_keyserver_port;
215	}
216	if (!hkp_recv_key (dlg, kserv, port, keyid+8, 0, 0)) {
217	keycache_reload (dlg);
218	kc = keycache_get_ctx (KEYCACHE_PUB);
219	if (!kc)
220	BUG (dlg);
221	}
222	}
223	else if (gpgme_err_code (sig->status) == GPG_ERR_BAD_SIGNATURE &&
224	!sig->timestamp)
225	;
226	else if (!sig->timestamp) {
227	msg_box (dlg, _("Invalid signature state."), _("Verify"), MB_ERR);
228	gpgme_release (c);
229	EndDialog (dlg, FALSE);
230	return FALSE;
231	}
232	verlist_build (&lv, GetDlgItem (dlg, IDC_VERIFY_SIGLIST), 0);
233
234	for (s = sig; s; s = s->next) {
235	rc = verlist_add_sig (lv, s);
236	if (rc)
237	msg_box (dlg, _("Could not extract key or signature information."),
238	_("Verify"), MB_ERR);
239	}
240	if (sig->exp_timestamp > (DWORD)time (NULL))
241	SetDlgItemText( dlg, IDC_VERIFY_INFO, _("The signature is expired!") );
242	if (sig->notations)
243	show_notation_data (dlg, sig->notations);
244	gpgme_release (c);
245	SetForegroundWindow (dlg);
246	set_active_window (dlg);
247	return TRUE;
248
249	case WM_DESTROY:
250	reset_active_window ();
251	if (lv) {
252	listview_release (lv);
253	lv = NULL;
254	}
255	return FALSE;
256
257	case WM_SYSCOMMAND:
258	if (LOWORD (wparam) == SC_CLOSE)
259	EndDialog (dlg, TRUE);
260	return FALSE;
261
262	case WM_COMMAND:
263	switch (LOWORD (wparam )) {
264	case IDOK:
265	EndDialog (dlg, TRUE);
266	return FALSE;
267
268	case IDC_VERIFY_SAVE:
269	dialog_box_param (glob_hinst, (LPCTSTR)IDD_WINPT_FILE_SAVE, dlg,
270	file_save_dlg_proc, 0, _("Save Plaintext"),
271	IDS_WINPT_FILE_SAVE);
272	break;
273	}
274	break;
275	}
276
277	return FALSE;
278	}
279