trunk/Src/wptClipDecryptDlg.cpp

/* wptClipDecryptDlg.cpp - Clipboard decrypt dialog
 *      Copyright (C) 2000-2005 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 <windows.h>

#include "wptTypes.h"
#include "wptW32API.h"
#include "wptAgent.h"
#include "wptNLS.h"
#include "wptGPG.h"
#include "wptVersion.h"
#include "wptErrors.h"
#include "wptCommonCtl.h"
#include "wptContext.h"
#include "wptDlgs.h"
#include "wptKeylist.h"
#include "wptFileManager.h"
#include "wptCrypto.h"
#include "resource.h"

bool secret_key_available (gpgme_recipient_t rset);

/* Return the primary user-ID of the key with the keyid @keyid. 
   Caller must free string. */
char*
get_key_userid (const char *keyid)
{
    gpgme_key_t key;
    const char *s;
    char *p;

    if (get_pubkey (keyid, &key))
        return m_strdup (_("user ID not found"));
    s = key->uids->uid;
    if (!s)
        s = _("user ID not found");
    p = new char[strlen (s) + 4 + 8];
    if (!p)
        BUG (NULL);
    sprintf (p, "\n    \"%s\"", s);
    return p;
}


/* Decrypt the clipboard contents and on success
   replace the data with the plaintext.
   Return value: 0 on success. */
gpgme_error_t
gpgme_op_clip_decrypt (gpgme_ctx_t ctx)
{
    gpgme_error_t err;
    gpgme_data_t ciph = NULL;
    gpgme_data_t plain = NULL;
    
    err = gpg_data_new_from_clipboard (&ciph, 0);
    if (err)
        return err;

    err = gpgme_data_new (&plain);
    if (err) {
        gpgme_data_release (ciph);
        return err;
    }

    err = gpgme_op_decrypt_verify (ctx, ciph, plain);

    gpg_data_release_and_set_clipboard (plain, 0);
    gpgme_data_release (ciph);
    return err;
}


/* Convenient function to provide clipboard decryption.
   @hwnd is the parent window used for showing messsages.
   Return value: 0 on success. */
gpgme_error_t
clip_decrypt_dlg (HWND hwnd)
{
    gpgme_error_t err;
    gpgme_ctx_t ctx = NULL;
    gpgme_signature_t sig = NULL;
    gpgme_decrypt_result_t res;
    gpgme_verify_result_t sigres;
    passphrase_cb_s pwd;
    const char *s;
    int novalid = 0;

    /* allow to verify data generated by 'gpg -a --sign foo' */
    if (fm_assume_onepass_sig (NULL) == 0) {
        /* XXX: addtitional steps needed? */
    }

    err = gpgme_new (&ctx);
    if (err)
        BUG (NULL);
    set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_DECRYPT, hwnd, _("Decryption"));
    err = gpgme_op_clip_decrypt (ctx);
    if (pwd.cancel)
        goto leave;
    if (gpgme_err_code (err) ==  GPG_ERR_BAD_PASSPHRASE)
        agent_del_cache (pwd.keyid);

    res = gpgme_op_decrypt_result (ctx);
    if (err && res->recipients && !secret_key_available (res->recipients)) {
        gpgme_recipient_t r = res->recipients;
        char *p = get_key_userid (r->keyid+8);
        
        log_box (_("Decryption"), MB_ERR, 
                 _("Encrypted with %s key, ID %s.%s\n"
                   "Decryption failed: secret key not available."), 
                   get_key_pubalgo (r->pubkey_algo), r->keyid+8, p);
        free_if_alloc (p);
        goto leave;
    }
    else if (res->unsupported_algorithm) {
        log_box (_("Decryption"), MB_ERR, _("Unsupported algorithm: %s"), 
                 res->unsupported_algorithm);
    }
    else if (err) {
        int pgp_type;
        gpg_clip_get_pgptype (&pgp_type);
        if (gpgme_err_code (err) == GPG_ERR_NO_DATA
            && (pgp_type & PGP_MESSAGE))
            msg_box (hwnd, _("Broken OpenPGP message (maybe: quoted printable "
                             "character in armor)."),
                     _("Decryption"), MB_INFO);
        else
            msg_box (hwnd, gpgme_strerror (err), _("Decryption"), MB_ERR);
        goto leave;
    }

    /* Too paranoid??
    if (flags & GPGME_OPFLAG_BADMDC) {
        const char *s;
        s = _("WARNING: encrypted message has been manipulated!\n"
            "\n"
            "Do *NOT* trust any text or data output from this file!\n"
            "It is likely, the data was corrupted during the transport\n"
            "but it might be also possible that this is part of an attack.");
        msg_box (hwnd, s, _("*** IMPORTANT ***"), MB_INFO);
    }*/
    

    show_msg (GetDesktopWindow (), 1500, _("GnuPG Status: Finished"));

    sigres = gpgme_op_verify_result (ctx);
    if (sigres && sigres->signatures) {
        gpgme_key_t key=NULL;
        const char *keyid;
        const char *uid;

        sig = sigres->signatures;
        if (!sig->fpr)
            BUG (NULL);
        keyid = strlen (sig->fpr) == 40? sig->fpr+24 : sig->fpr+16;

        get_pubkey (keyid, &key);
        if (key) {
            if (key->owner_trust == GPGME_VALIDITY_FULL || 
                key->owner_trust == GPGME_VALIDITY_ULTIMATE)
                s = _("Signature Status: Created with a fully trusted key");
            else if (key->owner_trust == GPGME_VALIDITY_MARGINAL)
                s = _("Signature Status: Created with a marginal trusted key");
            else if (key->owner_trust == GPGME_VALIDITY_NEVER) {
                novalid = 1;
                s =  _("Signature Status: Created with an UNTRUSTED key");
            }
            else
                s = _("Signature Status: Created with an undefined trusted key");
        }
        else
            s = "";

        if (key)
            uid = key->uids->uid;
        else
            uid = _("user ID not found");
        log_box (_("WinPT Verify"), MB_OK, 
                 _("%s\n"
                   "%s\n"
                   "Signature made %s\n"
                   "From \"%s\" using key ID 0x%s"
                   "%s %s"),
                   s, get_gpg_sigstat (sig->summary), 
                   strtimestamp (sig->timestamp),
                   uid, keyid+8, 
                   novalid? "\nPrimary key fingerprint: " : "",
                   novalid? get_key_fpr (key) : "");
    }
    
leave:
    release_gpg_passphrase_cb (&pwd);
    gpgme_release (ctx);
    return err;
}
1	werner	36	/* wptClipDecryptDlg.cpp - Clipboard decrypt dialog
2			* Copyright (C) 2000-2005 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
22	werner	42	#ifdef HAVE_CONFIG_H
23			#include <config.h>
24			#endif
25
26	werner	36	#include <windows.h>
27	werner	42	#include <windows.h>
28	werner	36
29			#include "wptTypes.h"
30			#include "wptW32API.h"
31			#include "wptAgent.h"
32			#include "wptNLS.h"
33			#include "wptGPG.h"
34			#include "wptVersion.h"
35			#include "wptErrors.h"
36			#include "wptCommonCtl.h"
37			#include "wptContext.h"
38			#include "wptDlgs.h"
39			#include "wptKeylist.h"
40			#include "wptFileManager.h"
41	werner	47	#include "wptCrypto.h"
42			#include "resource.h"
43	werner	36
44			bool secret_key_available (gpgme_recipient_t rset);
45
46			/* Return the primary user-ID of the key with the keyid @keyid.
47			Caller must free string. */
48			char*
49			get_key_userid (const char *keyid)
50			{
51			gpgme_key_t key;
52			const char *s;
53			char *p;
54
55			if (get_pubkey (keyid, &key))
56			return m_strdup (_("user ID not found"));
57			s = key->uids->uid;
58			if (!s)
59			s = _("user ID not found");
60			p = new char[strlen (s) + 4 + 8];
61			if (!p)
62			BUG (NULL);
63			sprintf (p, "\n \"%s\"", s);
64			return p;
65			}
66
67
68			/* Decrypt the clipboard contents and on success
69			replace the data with the plaintext.
70			Return value: 0 on success. */
71			gpgme_error_t
72			gpgme_op_clip_decrypt (gpgme_ctx_t ctx)
73			{
74			gpgme_error_t err;
75			gpgme_data_t ciph = NULL;
76			gpgme_data_t plain = NULL;
77
78			err = gpg_data_new_from_clipboard (&ciph, 0);
79			if (err)
80			return err;
81
82			err = gpgme_data_new (&plain);
83			if (err) {
84			gpgme_data_release (ciph);
85			return err;
86			}
87
88	twoaday	41	err = gpgme_op_decrypt_verify (ctx, ciph, plain);
89	werner	36
90			gpg_data_release_and_set_clipboard (plain, 0);
91			gpgme_data_release (ciph);
92			return err;
93			}
94
95
96			/* Convenient function to provide clipboard decryption.
97			@hwnd is the parent window used for showing messsages.
98			Return value: 0 on success. */
99			gpgme_error_t
100			clip_decrypt_dlg (HWND hwnd)
101			{
102			gpgme_error_t err;
103			gpgme_ctx_t ctx = NULL;
104			gpgme_signature_t sig = NULL;
105			gpgme_decrypt_result_t res;
106			gpgme_verify_result_t sigres;
107			passphrase_cb_s pwd;
108	twoaday	41	const char *s;
109	werner	36	int novalid = 0;
110
111			/* allow to verify data generated by 'gpg -a --sign foo' */
112			if (fm_assume_onepass_sig (NULL) == 0) {
113			/* XXX: addtitional steps needed? */
114			}
115
116			err = gpgme_new (&ctx);
117			if (err)
118			BUG (NULL);
119			set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_DECRYPT, hwnd, _("Decryption"));
120			err = gpgme_op_clip_decrypt (ctx);
121			if (pwd.cancel)
122			goto leave;
123			if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE)
124			agent_del_cache (pwd.keyid);
125
126			res = gpgme_op_decrypt_result (ctx);
127			if (err && res->recipients && !secret_key_available (res->recipients)) {
128			gpgme_recipient_t r = res->recipients;
129			char *p = get_key_userid (r->keyid+8);
130
131			log_box (_("Decryption"), MB_ERR,
132			_("Encrypted with %s key, ID %s.%s\n"
133			"Decryption failed: secret key not available."),
134			get_key_pubalgo (r->pubkey_algo), r->keyid+8, p);
135			free_if_alloc (p);
136			goto leave;
137			}
138	twoaday	41	else if (res->unsupported_algorithm) {
139			log_box (_("Decryption"), MB_ERR, _("Unsupported algorithm: %s"),
140			res->unsupported_algorithm);
141			}
142	werner	36	else if (err) {
143			int pgp_type;
144			gpg_clip_get_pgptype (&pgp_type);
145	werner	47	if (gpgme_err_code (err) == GPG_ERR_NO_DATA
146			&& (pgp_type & PGP_MESSAGE))
147	werner	36	msg_box (hwnd, _("Broken OpenPGP message (maybe: quoted printable "
148	werner	47	"character in armor)."),
149			_("Decryption"), MB_INFO);
150	werner	36	else
151			msg_box (hwnd, gpgme_strerror (err), _("Decryption"), MB_ERR);
152			goto leave;
153			}
154
155			/* Too paranoid??
156			if (flags & GPGME_OPFLAG_BADMDC) {
157			const char *s;
158			s = _("WARNING: encrypted message has been manipulated!\n"
159			"\n"
160			"Do NOT trust any text or data output from this file!\n"
161			"It is likely, the data was corrupted during the transport\n"
162			"but it might be also possible that this is part of an attack.");
163			msg_box (hwnd, s, _("* IMPORTANT *"), MB_INFO);
164			}*/
165
166
167			show_msg (GetDesktopWindow (), 1500, _("GnuPG Status: Finished"));
168
169			sigres = gpgme_op_verify_result (ctx);
170			if (sigres && sigres->signatures) {
171	twoaday	41	gpgme_key_t key=NULL;
172			const char *keyid;
173			const char *uid;
174	werner	36
175			sig = sigres->signatures;
176			if (!sig->fpr)
177	twoaday	41	BUG (NULL);
178			keyid = strlen (sig->fpr) == 40? sig->fpr+24 : sig->fpr+16;
179	werner	36
180			get_pubkey (keyid, &key);
181	twoaday	41	if (key) {
182			if (key->owner_trust == GPGME_VALIDITY_FULL \|\|
183			key->owner_trust == GPGME_VALIDITY_ULTIMATE)
184			s = _("Signature Status: Created with a fully trusted key");
185			else if (key->owner_trust == GPGME_VALIDITY_MARGINAL)
186			s = _("Signature Status: Created with a marginal trusted key");
187			else if (key->owner_trust == GPGME_VALIDITY_NEVER) {
188			novalid = 1;
189			s = _("Signature Status: Created with an UNTRUSTED key");
190			}
191			else
192			s = _("Signature Status: Created with an undefined trusted key");
193	werner	36	}
194			else
195	twoaday	41	s = "";
196	werner	36
197			if (key)
198	twoaday	41	uid = key->uids->uid;
199	werner	36	else
200	twoaday	41	uid = _("user ID not found");
201	werner	36	log_box (_("WinPT Verify"), MB_OK,
202			_("%s\n"
203			"%s\n"
204			"Signature made %s\n"
205			"From \"%s\" using key ID 0x%s"
206			"%s %s"),
207	twoaday	41	s, get_gpg_sigstat (sig->summary),
208			strtimestamp (sig->timestamp),
209			uid, keyid+8,
210	werner	36	novalid? "\nPrimary key fingerprint: " : "",
211			novalid? get_key_fpr (key) : "");
212			}
213
214			leave:
215			release_gpg_passphrase_cb (&pwd);
216			gpgme_release (ctx);
217			return err;
218			}