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twoaday |
220 |
/* wptClipDecryptDlg.cpp - Clipboard decryption |
| 2 |
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* Copyright (C) 2000-2006 Timo Schulz |
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werner |
36 |
* Copyright (C) 2005 g10 Code GmbH |
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* |
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* This file is part of WinPT. |
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* |
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* WinPT is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* WinPT is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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werner |
42 |
#ifdef HAVE_CONFIG_H |
| 18 |
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#include <config.h> |
| 19 |
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#endif |
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werner |
36 |
#include <windows.h> |
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twoaday |
231 |
#include <assert.h> |
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#include <time.h> |
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werner |
36 |
|
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#include "wptTypes.h" |
| 26 |
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#include "wptW32API.h" |
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#include "wptAgent.h" |
| 28 |
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#include "wptNLS.h" |
| 29 |
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#include "wptGPG.h" |
| 30 |
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#include "wptVersion.h" |
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#include "wptErrors.h" |
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#include "wptCommonCtl.h" |
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#include "wptContext.h" |
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#include "wptDlgs.h" |
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#include "wptKeylist.h" |
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twoaday |
129 |
#include "wptUTF8.h" |
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werner |
47 |
#include "resource.h" |
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werner |
36 |
|
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twoaday |
217 |
bool is_seckey_available (gpgme_recipient_t rset); |
| 40 |
twoaday |
220 |
char* get_pka_status (gpgme_signature_t sig); |
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werner |
36 |
|
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twoaday |
220 |
|
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werner |
36 |
/* Return the primary user-ID of the key with the keyid @keyid. |
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Caller must free string. */ |
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char* |
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get_key_userid (const char *keyid) |
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{ |
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twoaday |
208 |
winpt_key_s key; |
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twoaday |
256 |
const char *fmt, *userid; |
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twoaday |
208 |
char *uid; |
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werner |
36 |
|
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twoaday |
256 |
fmt = "\n \"%s\""; |
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twoaday |
208 |
memset (&key, 0, sizeof (key)); |
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if (winpt_get_pubkey (keyid, &key)) |
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twoaday |
256 |
userid = (_("user ID not found")); |
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else |
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userid = key.ext->uids->uid; |
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uid = new char[strlen (userid) + strlen (fmt)+ 2]; |
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twoaday |
129 |
if (!uid) |
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werner |
36 |
BUG (NULL); |
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twoaday |
256 |
sprintf (uid, fmt, userid); |
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twoaday |
217 |
winpt_release_pubkey (&key); |
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twoaday |
208 |
return uid; |
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werner |
36 |
} |
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/* Decrypt the clipboard contents and on success |
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replace the data with the plaintext. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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gpgme_op_clip_decrypt (gpgme_ctx_t ctx) |
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{ |
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gpgme_error_t err; |
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gpgme_data_t ciph = NULL; |
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gpgme_data_t plain = NULL; |
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err = gpg_data_new_from_clipboard (&ciph, 0); |
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if (err) |
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return err; |
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err = gpgme_data_new (&plain); |
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if (err) { |
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gpgme_data_release (ciph); |
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return err; |
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} |
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twoaday |
41 |
err = gpgme_op_decrypt_verify (ctx, ciph, plain); |
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werner |
36 |
|
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gpg_data_release_and_set_clipboard (plain, 0); |
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gpgme_data_release (ciph); |
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return err; |
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} |
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twoaday |
229 |
/* Return humand readable ownertrust description for verification info. */ |
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const char* |
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verify_get_key_ownertrust (gpgme_validity_t key_ot, int *novalid) |
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{ |
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const char *s; |
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twoaday |
273 |
if (novalid) |
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*novalid = 0; /* reset */ |
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twoaday |
229 |
if (key_ot == GPGME_VALIDITY_FULL || |
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key_ot == GPGME_VALIDITY_ULTIMATE) |
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s = _("Signature status: created with a fully trusted key"); |
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else if (key_ot == GPGME_VALIDITY_MARGINAL) |
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s = _("Signature status: created with a marginal trusted key"); |
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else if (key_ot == GPGME_VALIDITY_NEVER) { |
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twoaday |
273 |
if (novalid) |
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*novalid = 1; |
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twoaday |
229 |
s = _("Signature status: created with an UNTRUSTED key"); |
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} |
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else |
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s = _("Signature status: created with an undefined trusted key"); |
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return s; |
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} |
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/* Return a signature specific header and footer for the clipboard. */ |
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void |
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verify_get_clip_info (gpgme_signature_t sig, char **r_header, char **r_footer) |
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{ |
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struct winpt_key_s pk; |
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twoaday |
231 |
const char *head = _("*** PGP SIGNATURE VERIFICATION ***\r\n" |
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"*** Signature made: %s\r\n" |
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"*** Signature verfied: %s\r\n" |
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"*** %s\r\n" |
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"*** Signature result: %s\r\n" |
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"*** Signer: %s (0x%s)\r\n" |
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"*** BEGIN PGP DECRYPTED TEXT ***\r\n"); |
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const char *foot = _("\r\n*** END PGP DECRYPTED TEXT ***"); |
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twoaday |
273 |
const char *s, *ver, *ot, *uid; |
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twoaday |
256 |
char *p, *made; |
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twoaday |
229 |
|
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twoaday |
273 |
if (winpt_get_pubkey (sig->fpr, &pk)) { |
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uid = _("user ID not found"); |
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ot = verify_get_key_ownertrust (GPGME_VALIDITY_UNDEFINED, NULL); |
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} |
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else { |
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uid = pk.ext->uids->uid; |
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ot = verify_get_key_ownertrust (pk.ctx->owner_trust, NULL); |
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} |
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twoaday |
256 |
made = m_strdup (strtimestamp (sig->timestamp)); |
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twoaday |
231 |
ver = strtimestamp (time (NULL)); |
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twoaday |
229 |
s = get_gpg_sigstat (sig->summary); |
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p = new char[strlen (head) + strlen (s) + strlen (made) + |
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twoaday |
231 |
strlen (sig->fpr) + strlen (ot) + strlen (ver) + |
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twoaday |
273 |
strlen (uid) + 1]; |
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twoaday |
229 |
if (!p) |
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BUG (0); |
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twoaday |
273 |
sprintf (p, head, made, ver, ot, s, uid, get_keyid_from_fpr (sig->fpr)); |
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twoaday |
229 |
*r_header = p; |
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*r_footer = m_strdup (foot); |
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twoaday |
256 |
free_if_alloc (made); |
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twoaday |
229 |
} |
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twoaday |
220 |
/* Show a human readable description of the given signature @sig. */ |
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void |
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verify_show_signature_state (gpgme_signature_t sig) |
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{ |
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winpt_key_s key; |
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const char *keyid, *uid; |
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const char *s; |
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char *pka_info = NULL; |
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int novalid = 0; |
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twoaday |
231 |
assert (sig->fpr != NULL); |
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twoaday |
220 |
|
| 171 |
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keyid = get_keyid_from_fpr (sig->fpr); |
| 172 |
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memset (&key, 0, sizeof (key)); |
| 173 |
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if (!winpt_get_pubkey (keyid, &key)) { |
| 174 |
twoaday |
229 |
s = verify_get_key_ownertrust (key.ctx->owner_trust, &novalid); |
| 175 |
twoaday |
220 |
uid = key.ext->uids->uid; |
| 176 |
twoaday |
231 |
} |
| 177 |
twoaday |
220 |
else { |
| 178 |
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s = ""; |
| 179 |
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uid = _("user ID not found"); |
| 180 |
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} |
| 181 |
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| 182 |
twoaday |
229 |
pka_info = get_pka_status (sig); |
| 183 |
twoaday |
220 |
log_box (_("Decrypt Verify"), novalid? MB_WARN : MB_OK, |
| 184 |
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_("%s\n" |
| 185 |
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"%s\n" |
| 186 |
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"Signature made: %s\n" |
| 187 |
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"From \"%s\" using key ID 0x%s" |
| 188 |
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"%s %s\n%s"), |
| 189 |
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s, get_gpg_sigstat (sig->summary), |
| 190 |
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strtimestamp (sig->timestamp), |
| 191 |
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uid, keyid, |
| 192 |
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novalid? "\nPrimary key fingerprint: " : "", |
| 193 |
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novalid? get_key_fpr (key.ctx) : "", |
| 194 |
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pka_info? pka_info : "" |
| 195 |
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); |
| 196 |
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free_if_alloc (pka_info); |
| 197 |
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winpt_release_pubkey (&key); |
| 198 |
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} |
| 199 |
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| 200 |
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| 201 |
werner |
36 |
/* Convenient function to provide clipboard decryption. |
| 202 |
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@hwnd is the parent window used for showing messsages. |
| 203 |
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Return value: 0 on success. */ |
| 204 |
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gpgme_error_t |
| 205 |
twoaday |
229 |
clip_decrypt_dlg (HWND hwnd, int use_viewer) |
| 206 |
werner |
36 |
{ |
| 207 |
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gpgme_error_t err; |
| 208 |
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gpgme_ctx_t ctx = NULL; |
| 209 |
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gpgme_decrypt_result_t res; |
| 210 |
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gpgme_verify_result_t sigres; |
| 211 |
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passphrase_cb_s pwd; |
| 212 |
twoaday |
179 |
int pgp_type = 0; |
| 213 |
werner |
36 |
|
| 214 |
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/* allow to verify data generated by 'gpg -a --sign foo' */ |
| 215 |
twoaday |
214 |
if (fm_assume_onepass_sig (NULL) == 1) { |
| 216 |
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dialog_box_param (glob_hinst, (LPCSTR)IDD_WINPT_VERIFY, hwnd, |
| 217 |
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clip_verify_dlg_proc, 0, |
| 218 |
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_("Verify"), IDS_WINPT_VERIFY); |
| 219 |
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return 0; |
| 220 |
werner |
36 |
} |
| 221 |
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| 222 |
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err = gpgme_new (&ctx); |
| 223 |
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if (err) |
| 224 |
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BUG (NULL); |
| 225 |
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set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_DECRYPT, hwnd, _("Decryption")); |
| 226 |
twoaday |
179 |
gpg_get_recipients (NULL, &pwd.recipients); |
| 227 |
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| 228 |
werner |
36 |
err = gpgme_op_clip_decrypt (ctx); |
| 229 |
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if (pwd.cancel) |
| 230 |
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goto leave; |
| 231 |
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if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) |
| 232 |
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agent_del_cache (pwd.keyid); |
| 233 |
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| 234 |
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res = gpgme_op_decrypt_result (ctx); |
| 235 |
twoaday |
217 |
if (err && res->recipients && !is_seckey_available (res->recipients)) { |
| 236 |
werner |
36 |
gpgme_recipient_t r = res->recipients; |
| 237 |
twoaday |
208 |
char *u = get_key_userid (r->keyid+8); |
| 238 |
werner |
36 |
log_box (_("Decryption"), MB_ERR, |
| 239 |
twoaday |
256 |
_("Encrypted with %s key, ID 0x%s.%s\n" |
| 240 |
werner |
36 |
"Decryption failed: secret key not available."), |
| 241 |
twoaday |
208 |
get_key_pubalgo (r->pubkey_algo), r->keyid+8, u); |
| 242 |
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free_if_alloc (u); |
| 243 |
werner |
36 |
goto leave; |
| 244 |
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} |
| 245 |
twoaday |
41 |
else if (res->unsupported_algorithm) { |
| 246 |
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log_box (_("Decryption"), MB_ERR, _("Unsupported algorithm: %s"), |
| 247 |
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res->unsupported_algorithm); |
| 248 |
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} |
| 249 |
werner |
36 |
else if (err) { |
| 250 |
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gpg_clip_get_pgptype (&pgp_type); |
| 251 |
twoaday |
129 |
if (gpgme_err_code (err) == GPG_ERR_NO_DATA && (pgp_type & PGP_MESSAGE)) |
| 252 |
werner |
36 |
msg_box (hwnd, _("Broken OpenPGP message (maybe: quoted printable " |
| 253 |
twoaday |
129 |
"character in armor)."), _("Decryption"), MB_INFO); |
| 254 |
werner |
36 |
else |
| 255 |
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msg_box (hwnd, gpgme_strerror (err), _("Decryption"), MB_ERR); |
| 256 |
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goto leave; |
| 257 |
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} |
| 258 |
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| 259 |
twoaday |
236 |
#if 0 |
| 260 |
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if (status_bad_mdc) { /* XXX: Bad MDC */ |
| 261 |
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const char *s = |
| 262 |
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_("WARNING: encrypted message has been manipulated!\n" |
| 263 |
werner |
36 |
"\n" |
| 264 |
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"Do *NOT* trust any text or data output from this file!\n" |
| 265 |
twoaday |
248 |
"It is likely that the data was corrupted in transport\n" |
| 266 |
werner |
36 |
"but it might be also possible that this is part of an attack."); |
| 267 |
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msg_box (hwnd, s, _("*** IMPORTANT ***"), MB_INFO); |
| 268 |
twoaday |
179 |
} |
| 269 |
twoaday |
236 |
#endif |
| 270 |
werner |
36 |
|
| 271 |
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show_msg (GetDesktopWindow (), 1500, _("GnuPG Status: Finished")); |
| 272 |
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| 273 |
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sigres = gpgme_op_verify_result (ctx); |
| 274 |
twoaday |
229 |
if (sigres && sigres->signatures) { |
| 275 |
|
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if (!use_viewer) |
| 276 |
|
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verify_show_signature_state (sigres->signatures); |
| 277 |
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else |
| 278 |
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DialogBoxParam (glob_hinst, (LPCTSTR)IDD_WINPT_CLIPEDIT, |
| 279 |
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hwnd, clip_edit_dlg_proc, |
| 280 |
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(LPARAM)sigres->signatures); |
| 281 |
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} |
| 282 |
twoaday |
236 |
else if (use_viewer) |
| 283 |
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DialogBoxParam (glob_hinst, (LPCTSTR)IDD_WINPT_CLIPEDIT, |
| 284 |
|
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hwnd, clip_edit_dlg_proc, 0); |
| 285 |
twoaday |
229 |
|
| 286 |
werner |
36 |
leave: |
| 287 |
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release_gpg_passphrase_cb (&pwd); |
| 288 |
|
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gpgme_release (ctx); |
| 289 |
|
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return err; |
| 290 |
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} |
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