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:
        SetWindowText (dlg, _("Verify"));
        SetDlgItemText (dlg, IDC_VERIFY_SAVE, _("&Save"));
        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, get_gpg_sigstat (GPGME_SIGSUM_KEY_MISSING), _("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);
        return TRUE;
        
    case WM_DESTROY:
        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	werner	36	/* 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	werner	42	#ifdef HAVE_CONFIG_H
21			#include <config.h>
22			#endif
23
24	werner	36	#include <windows.h>
25	twoaday	41	#include <time.h>
26	werner	36
27	werner	47	#include "resource.h"
28	werner	36	#include "wptGPG.h"
29			#include "wptTypes.h"
30			#include "wptCommonCtl.h"
31			#include "wptKeylist.h"
32			#include "wptW32API.h"
33			#include "wptKeyserver.h"
34			#include "wptNLS.h"
35			#include "wptContext.h" /* for passwd_s */
36			#include "wptDlgs.h"
37			#include "wptErrors.h"
38			#include "wptVersion.h"
39
40			/* XXX use out directly and do not use gpg_data_extract to store the plain text. */
41
42
43			/* Verify data from the clipboard. If @is_detached is set, a detached
44			signature is assumed with the data the signature was calculated over
45			in @det_data. The context is returned in @r_ctx and the signature
46			in @r_sig.
47			Return value: 0 on success. */
48			gpgme_error_t
49			gpg_clip_verify (int is_detached,
50			const char *det_data, size_t det_len,
51			gpgme_ctx_t *r_ctx,
52			gpgme_signature_t *r_sig)
53			{
54			gpgme_error_t err;
55			gpgme_ctx_t ctx;
56			gpgme_data_t dat = NULL;
57			gpgme_data_t out = NULL;
58			gpgme_data_t sig = NULL;
59			gpgme_verify_result_t res;
60
61			if (is_detached) {
62			err = gpgme_data_new_from_mem (&dat, det_data, det_len, 1);
63			if (err)
64			return err;
65			}
66
67			err = gpgme_new (&ctx);
68			if (err)
69			goto leave;
70			err = gpg_data_new_from_clipboard (&sig, 0);
71			if (err)
72			goto leave;
73			err = gpgme_data_new (&out);
74			if (err)
75			goto leave;
76
77			err = gpgme_op_verify (ctx, sig, dat, out);
78			if (err)
79			goto leave;
80			res = gpgme_op_verify_result (ctx);
81			if (!res \|\| !res->signatures) {
82			err = gpg_error (GPG_ERR_NO_DATA);
83			goto leave;
84			}
85			*r_sig = res->signatures;
86			*r_ctx = ctx;
87
88			leave:
89			if (err) {
90			gpgme_release (ctx);
91			*r_ctx = NULL;
92			}
93			if (dat)
94			gpgme_data_release (dat);
95			if (out)
96			gpgme_data_release (out);
97			gpgme_data_release (sig);
98			return err;
99			}
100
101
102			/* Display the policy URL and the notation data of a signature.
103			If @not is NULL, it is assumed there is no data.
104			@dlg is the handle to the calling dialog. */
105			static void
106	werner	47	show_notation_data (HWND dlg, gpgme_sig_notation_t nota)
107	werner	36	{
108			gpgme_sig_notation_t n;
109			size_t len=0;
110			char *p;
111
112	werner	47	for (n=nota; n; n = n->next) {
113	werner	36	if (n->name)
114			len += strlen (n->name) + 1 + 2;
115			else
116			len += strlen ("policy URL") + 1 + 2;
117			len += strlen (n->value) + 1 + 2;
118			len += 6;
119			}
120			p = (char *)calloc (1, len+64);
121			if (!p)
122			BUG (NULL);
123			strcpy (p, "Notation data:\n");
124	werner	47	for (n=nota; n; n = n->next) {
125	werner	36	if (!n->name)
126			strcat (p, "policy url: ");
127			else {
128			strcat (p, n->name);
129			strcat (p, " : ");
130			}
131			strcat (p, "\"");
132			strcat (p, n->value);
133			strcat (p, "\"\n");
134			}
135
136			msg_box (dlg, p, _("Signature Information"), MB_INFO);
137			free (p);
138			}
139
140
141			/* Dialog procedure for the clipboard verification. */
142			BOOL CALLBACK
143			clip_verify_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
144			{
145			static listview_ctrl_t lv = NULL;
146			static text_input_s *ctx = NULL;
147			gpgme_error_t err;
148			gpgme_signature_t sig = NULL, s;
149			gpg_keycache_t kc = NULL;
150			gpgme_ctx_t c=NULL;
151			const char *det_data=NULL;
152			u16 port = HKP_PORT;
153			int rc = 0, det_len=0;
154
155			switch( msg ) {
156			case WM_INITDIALOG:
157			SetWindowText (dlg, _("Verify"));
158	twoaday	85	SetDlgItemText (dlg, IDC_VERIFY_SAVE, _("&Save"));
159	werner	36	kc = keycache_get_ctx (KEYCACHE_PUB);
160			if (!kc)
161			BUG (NULL);
162			ctx = (text_input_s *)lparam;
163			if (ctx) {
164			det_data = ctx->data;
165			det_len = ctx->length;
166			}
167			err = gpg_clip_verify (ctx && ctx->length > 0,
168			det_data, det_len, &c, &sig);
169			if (err) {
170			msg_box (dlg, gpgme_strerror (err), _("Verify"), MB_ERR);
171			if (c)
172			gpgme_release (c);
173			EndDialog (dlg, FALSE);
174			return FALSE;
175			}
176
177			if (gpgme_err_code (sig->status) == GPG_ERR_NO_PUBKEY) {
178	twoaday	41	const char *keyid;
179			const char *kserv;
180			if (!sig->fpr)
181			BUG (NULL);
182			if (strlen (sig->fpr) == 40)
183			keyid = sig->fpr+24;
184			else
185			keyid = sig->fpr+16;
186	werner	36	rc = log_box (_("Verify"), MB_INFO\|MB_YESNO,
187			_("Signature made %s using %s key ID 0x%s\n"
188			"Cannot check signature: public key not found\n\n"
189			"Do you want to try to retrieve the key from the keyserver?"),
190			strtimestamp (sig->timestamp),
191	twoaday	41	get_key_pubalgo (sig->pubkey_algo), keyid+8);
192	werner	36	if (rc == IDNO) {
193	twoaday	109	msg_box (dlg, get_gpg_sigstat (GPGME_SIGSUM_KEY_MISSING), _("Verify"), MB_WARN);
194	werner	36	gpgme_release (c);
195			EndDialog (dlg, FALSE);
196			return FALSE;
197			}
198			if (0) {
199			/* FIXME: does GPGME include the keyserver status
200			kserv = gpgme_sig_get_string_attr (sig, GPGME_ATTR_KEYSERVER);
201			if (kserv && strncmp (kserv, "hkp://", 6)) {
202			rc = log_box (_("Verify"), MB_INFO\|MB_YESNO,
203			_("The users preferred keyserver is '%s'.\n"
204			"Do you want to use it to fetch the key?"), kserv);
205			if (rc == IDNO) {
206			kserv = default_keyserver;
207			port = default_keyserver_port;
208			}*/
209			}
210			else {
211			kserv = default_keyserver;
212			port = default_keyserver_port;
213			}
214	twoaday	41	if (!hkp_recv_key (dlg, kserv, port, keyid+8, 0, 0)) {
215	werner	36	keycache_reload (dlg);
216			kc = keycache_get_ctx (KEYCACHE_PUB);
217			if (!kc)
218			BUG (dlg);
219			}
220			}
221	twoaday	41	else if (gpgme_err_code (sig->status) == GPG_ERR_BAD_SIGNATURE &&
222			!sig->timestamp)
223	werner	36	;
224	twoaday	76	else if (!sig->timestamp) {
225	werner	36	msg_box (dlg, _("Invalid signature state."), _("Verify"), MB_ERR);
226			gpgme_release (c);
227			EndDialog (dlg, FALSE);
228			return FALSE;
229			}
230			verlist_build (&lv, GetDlgItem (dlg, IDC_VERIFY_SIGLIST), 0);
231
232			for (s = sig; s; s = s->next) {
233			rc = verlist_add_sig (lv, s);
234			if (rc)
235			msg_box (dlg, _("Could not extract key or signature information."),
236			_("Verify"), MB_ERR);
237			}
238			if (sig->exp_timestamp > (DWORD)time (NULL))
239			SetDlgItemText( dlg, IDC_VERIFY_INFO, _("The signature is expired!") );
240			if (sig->notations)
241			show_notation_data (dlg, sig->notations);
242			gpgme_release (c);
243			SetForegroundWindow (dlg);
244			return TRUE;
245
246			case WM_DESTROY:
247			if (lv) {
248			listview_release (lv);
249			lv = NULL;
250			}
251			return FALSE;
252
253			case WM_SYSCOMMAND:
254			if (LOWORD (wparam) == SC_CLOSE)
255			EndDialog (dlg, TRUE);
256			return FALSE;
257
258			case WM_COMMAND:
259			switch (LOWORD (wparam )) {
260			case IDOK:
261			EndDialog (dlg, TRUE);
262			return FALSE;
263
264			case IDC_VERIFY_SAVE:
265			dialog_box_param (glob_hinst, (LPCTSTR)IDD_WINPT_FILE_SAVE, dlg,
266	twoaday	73	file_save_dlg_proc, 0, _("Save Plaintext"),
267	werner	36	IDS_WINPT_FILE_SAVE);
268			break;
269			}
270			break;
271			}
272
273			return FALSE;
274			}
275