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