trunk/Src/wptClipVerifyDlg.cpp

/* wptClipVerifyDlg.cpp - WinPT verify dialog
 *      Copyright (C) 2001-2006 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/or the notation data of a signature. */
static void
show_notation_data (HWND dlg, gpgme_ctx_t ctx)
{
    gpgme_sig_notation_t nota;
    gpgme_sig_notation_t n;
    gpgme_verify_result_t res;
    size_t len=0;
    char *p;

    res = gpgme_op_verify_result (ctx);
    if (!res || !res->signatures || !res->signatures->notations)
        return;
    nota = res->signatures->notations;
    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);
    safe_free (p);
}


/* Ask the user whether to fetch the missing key from the keyserver. */  
static BOOL
fetch_key_from_keyserver (HWND dlg, gpgme_signature_t sig)
{
    const char *keyid;
    int id;

    if (!sig->fpr)
        return FALSE;
    keyid = get_keyid_from_fpr (sig->fpr);          
    id = 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);
    if (id == IDNO) {
        msg_box (dlg, get_gpg_sigstat (GPGME_SIGSUM_KEY_MISSING), 
                 _("Verify"), MB_WARN);
        return FALSE;
    }

    /* XXX: gpgme currently does not include to return the preferred
            keyserver that might be stored within the signature. */

    if (!hkp_recv_key (dlg, default_keyserver, default_keyserver_port, 
                        keyid, 0, 0))
        keycache_update (0, keyid);
    return TRUE;
}


/* Dialog procedure for the clipboard verification. */
BOOL CALLBACK
clip_verify_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    static verlist_ctrl_t vlv = NULL;
    static gpgme_ctx_t c = NULL;
    text_input_s *ctx;
    gpgme_error_t err;
    gpgme_signature_t sig = NULL, s;
    gpg_keycache_t kc = NULL;
    const char *det_data=NULL;
    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);
        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) {
            if (fetch_key_from_keyserver (dlg, sig)) {
                gpgme_release (c);
                EndDialog (dlg, FALSE);
                return TRUE;
            }
        }
        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 (&vlv, GetDlgItem (dlg, IDC_VERIFY_SIGLIST), 0);
        verlist_set_info_control (vlv, GetDlgItem (dlg, IDC_VERIFY_INFO));

        for (s = sig; s; s = s->next) {
            rc = verlist_add_sig (vlv, s);
            if (rc)
                msg_box (dlg, _("Could not extract key or signature information."), 
                         _("Verify"), MB_ERR);
        }
        
        if (!sig->notations)
            ShowWindow (GetDlgItem (dlg, IDC_VERIFY_SIGNOT), SW_HIDE);
        SetForegroundWindow (dlg);
        return TRUE;
        
    case WM_DESTROY:
        if (c != NULL) {
            gpgme_release (c);
            c = NULL;
        }
        if (vlv != NULL) {
            verlist_delete (vlv);
            vlv = NULL;
        }
        return FALSE;
        
    case WM_COMMAND:
        switch (LOWORD (wparam )) {
        case IDCANCEL:
            EndDialog (dlg, FALSE);
            return TRUE;

        case IDOK:
            EndDialog (dlg, TRUE);
            return TRUE;

        case IDC_VERIFY_SIGNOT:     
            show_notation_data (dlg, c);
            return TRUE;
            
        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	twoaday	256	* Copyright (C) 2001-2006 Timo Schulz
3	werner	36	*
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	twoaday	256	/* XXX use @out directly and do not use gpg_data_extract to store the plain text. */
41	werner	36
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			err = gpgme_op_verify (ctx, sig, dat, out);
77			if (err)
78			goto leave;
79			res = gpgme_op_verify_result (ctx);
80			if (!res \|\| !res->signatures) {
81			err = gpg_error (GPG_ERR_NO_DATA);
82			goto leave;
83			}
84			*r_sig = res->signatures;
85			*r_ctx = ctx;
86
87			leave:
88			if (err) {
89			gpgme_release (ctx);
90			*r_ctx = NULL;
91			}
92			if (dat)
93			gpgme_data_release (dat);
94			if (out)
95			gpgme_data_release (out);
96			gpgme_data_release (sig);
97			return err;
98			}
99
100
101	twoaday	256	/* Display the policy URL and/or the notation data of a signature. */
102	werner	36	static void
103	twoaday	225	show_notation_data (HWND dlg, gpgme_ctx_t ctx)
104	werner	36	{
105	twoaday	225	gpgme_sig_notation_t nota;
106	werner	36	gpgme_sig_notation_t n;
107	twoaday	225	gpgme_verify_result_t res;
108	werner	36	size_t len=0;
109			char *p;
110
111	twoaday	225	res = gpgme_op_verify_result (ctx);
112			if (!res \|\| !res->signatures \|\| !res->signatures->notations)
113			return;
114			nota = res->signatures->notations;
115	werner	47	for (n=nota; n; n = n->next) {
116	werner	36	if (n->name)
117			len += strlen (n->name) + 1 + 2;
118			else
119			len += strlen ("policy URL") + 1 + 2;
120			len += strlen (n->value) + 1 + 2;
121			len += 6;
122			}
123			p = (char *)calloc (1, len+64);
124			if (!p)
125			BUG (NULL);
126			strcpy (p, "Notation data:\n");
127	werner	47	for (n=nota; n; n = n->next) {
128	werner	36	if (!n->name)
129			strcat (p, "policy url: ");
130			else {
131			strcat (p, n->name);
132			strcat (p, " : ");
133			}
134			strcat (p, "\"");
135			strcat (p, n->value);
136			strcat (p, "\"\n");
137			}
138
139			msg_box (dlg, p, _("Signature Information"), MB_INFO);
140	twoaday	225	safe_free (p);
141	werner	36	}
142
143
144	twoaday	225	/* Ask the user whether to fetch the missing key from the keyserver. */
145			static BOOL
146			fetch_key_from_keyserver (HWND dlg, gpgme_signature_t sig)
147			{
148			const char *keyid;
149			int id;
150
151			if (!sig->fpr)
152			return FALSE;
153			keyid = get_keyid_from_fpr (sig->fpr);
154			id = log_box (_("Verify"), MB_INFO\|MB_YESNO,
155			_("Signature made %s using %s key ID 0x%s\n"
156			"Cannot check signature: public key not found\n\n"
157			"Do you want to try to retrieve the key from the keyserver?"),
158			strtimestamp (sig->timestamp),
159			get_key_pubalgo (sig->pubkey_algo), keyid);
160			if (id == IDNO) {
161			msg_box (dlg, get_gpg_sigstat (GPGME_SIGSUM_KEY_MISSING),
162			_("Verify"), MB_WARN);
163			return FALSE;
164			}
165
166			/* XXX: gpgme currently does not include to return the preferred
167			keyserver that might be stored within the signature. */
168
169	twoaday	256	if (!hkp_recv_key (dlg, default_keyserver, default_keyserver_port,
170			keyid, 0, 0))
171			keycache_update (0, keyid);
172	twoaday	225	return TRUE;
173			}
174
175
176	werner	36	/* Dialog procedure for the clipboard verification. */
177			BOOL CALLBACK
178			clip_verify_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
179			{
180	twoaday	219	static verlist_ctrl_t vlv = NULL;
181	twoaday	225	static gpgme_ctx_t c = NULL;
182	twoaday	219	text_input_s *ctx;
183	werner	36	gpgme_error_t err;
184			gpgme_signature_t sig = NULL, s;
185			gpg_keycache_t kc = NULL;
186			const char *det_data=NULL;
187			int rc = 0, det_len=0;
188
189	twoaday	201	switch (msg) {
190	werner	36	case WM_INITDIALOG:
191			SetWindowText (dlg, _("Verify"));
192	twoaday	85	SetDlgItemText (dlg, IDC_VERIFY_SAVE, _("&Save"));
193	werner	36	kc = keycache_get_ctx (KEYCACHE_PUB);
194			ctx = (text_input_s *)lparam;
195			if (ctx) {
196			det_data = ctx->data;
197			det_len = ctx->length;
198			}
199	twoaday	225	err = gpg_clip_verify (ctx && ctx->length > 0,
200	werner	36	det_data, det_len, &c, &sig);
201			if (err) {
202			msg_box (dlg, gpgme_strerror (err), _("Verify"), MB_ERR);
203			if (c)
204			gpgme_release (c);
205			EndDialog (dlg, FALSE);
206			return FALSE;
207			}
208
209			if (gpgme_err_code (sig->status) == GPG_ERR_NO_PUBKEY) {
210	twoaday	225	if (fetch_key_from_keyserver (dlg, sig)) {
211	werner	36	gpgme_release (c);
212	twoaday	225	EndDialog (dlg, FALSE);
213			return TRUE;
214	werner	36	}
215	twoaday	225	}
216	twoaday	41	else if (gpgme_err_code (sig->status) == GPG_ERR_BAD_SIGNATURE &&
217			!sig->timestamp)
218	werner	36	;
219	twoaday	76	else if (!sig->timestamp) {
220	werner	36	msg_box (dlg, _("Invalid signature state."), _("Verify"), MB_ERR);
221			gpgme_release (c);
222			EndDialog (dlg, FALSE);
223			return FALSE;
224			}
225	twoaday	219	verlist_build (&vlv, GetDlgItem (dlg, IDC_VERIFY_SIGLIST), 0);
226			verlist_set_info_control (vlv, GetDlgItem (dlg, IDC_VERIFY_INFO));
227	werner	36
228			for (s = sig; s; s = s->next) {
229	twoaday	219	rc = verlist_add_sig (vlv, s);
230	werner	36	if (rc)
231			msg_box (dlg, _("Could not extract key or signature information."),
232			_("Verify"), MB_ERR);
233			}
234	twoaday	219
235	twoaday	225	if (!sig->notations)
236			ShowWindow (GetDlgItem (dlg, IDC_VERIFY_SIGNOT), SW_HIDE);
237	werner	36	SetForegroundWindow (dlg);
238			return TRUE;
239
240			case WM_DESTROY:
241	twoaday	225	if (c != NULL) {
242			gpgme_release (c);
243			c = NULL;
244			}
245			if (vlv != NULL) {
246	twoaday	219	verlist_delete (vlv);
247			vlv = NULL;
248	werner	36	}
249			return FALSE;
250
251			case WM_COMMAND:
252			switch (LOWORD (wparam )) {
253	twoaday	219	case IDCANCEL:
254			EndDialog (dlg, FALSE);
255	twoaday	225	return TRUE;
256	twoaday	219
257	werner	36	case IDOK:
258			EndDialog (dlg, TRUE);
259	twoaday	225	return TRUE;
260
261			case IDC_VERIFY_SIGNOT:
262			show_notation_data (dlg, c);
263			return TRUE;
264	werner	36
265			case IDC_VERIFY_SAVE:
266			dialog_box_param (glob_hinst, (LPCTSTR)IDD_WINPT_FILE_SAVE, dlg,
267	twoaday	73	file_save_dlg_proc, 0, _("Save Plaintext"),
268	werner	36	IDS_WINPT_FILE_SAVE);
269			break;
270			}
271			break;
272			}
273
274			return FALSE;
275			}