| 1 |
/* wptClipDecryptDlg.cpp - Clipboard decryption |
| 2 |
* Copyright (C) 2000-2007 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 |
#ifdef HAVE_CONFIG_H |
| 18 |
#include <config.h> |
| 19 |
#endif |
| 20 |
|
| 21 |
#include <windows.h> |
| 22 |
#include <assert.h> |
| 23 |
#include <time.h> |
| 24 |
|
| 25 |
#include "wptTypes.h" |
| 26 |
#include "wptW32API.h" |
| 27 |
#include "wptAgent.h" |
| 28 |
#include "wptNLS.h" |
| 29 |
#include "wptGPG.h" |
| 30 |
#include "wptVersion.h" |
| 31 |
#include "wptErrors.h" |
| 32 |
#include "wptCommonCtl.h" |
| 33 |
#include "wptContext.h" |
| 34 |
#include "wptDlgs.h" |
| 35 |
#include "wptKeylist.h" |
| 36 |
#include "wptUTF8.h" |
| 37 |
#include "resource.h" |
| 38 |
#include "StringBuffer.h" |
| 39 |
|
| 40 |
bool is_seckey_available (gpgme_recipient_t rset); |
| 41 |
char* get_pka_status (gpgme_signature_t sig); |
| 42 |
|
| 43 |
|
| 44 |
/* Return the primary user-ID of the key with the keyid @keyid. |
| 45 |
Caller must free string. */ |
| 46 |
char* |
| 47 |
get_key_userid (const char *keyid) |
| 48 |
{ |
| 49 |
winpt_key_s key; |
| 50 |
StringBuffer p; |
| 51 |
const char *userid; |
| 52 |
char *uid; |
| 53 |
|
| 54 |
p = "\n "; |
| 55 |
memset (&key, 0, sizeof (key)); |
| 56 |
if (winpt_get_pubkey (keyid, &key)) |
| 57 |
userid = (_("user ID not found")); |
| 58 |
else |
| 59 |
userid = key.ext->uids->uid; |
| 60 |
p = p + "\"" + userid + "\""; |
| 61 |
|
| 62 |
winpt_release_pubkey (&key); |
| 63 |
uid = p.getBufferCopy (); |
| 64 |
return uid; |
| 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 |
int is_utf8=0; |
| 78 |
|
| 79 |
err = gpg_data_utf8_new_from_clipboard (&ciph, 0, &is_utf8); |
| 80 |
if (err) |
| 81 |
return err; |
| 82 |
|
| 83 |
err = gpgme_data_new (&plain); |
| 84 |
if (err) { |
| 85 |
gpgme_data_release (ciph); |
| 86 |
return err; |
| 87 |
} |
| 88 |
|
| 89 |
err = gpgme_op_decrypt_verify (ctx, ciph, plain); |
| 90 |
if (is_utf8) |
| 91 |
gpg_data_release_utf8_to_clipboard (plain); |
| 92 |
else |
| 93 |
gpg_data_release_to_clipboard (plain, 0); |
| 94 |
gpgme_data_release (ciph); |
| 95 |
return err; |
| 96 |
} |
| 97 |
|
| 98 |
|
| 99 |
/* Return humand readable ownertrust description for verification info. */ |
| 100 |
const char* |
| 101 |
verify_get_key_ownertrust (gpgme_validity_t key_ot, int *novalid) |
| 102 |
{ |
| 103 |
const char *s; |
| 104 |
|
| 105 |
if (novalid) |
| 106 |
*novalid = 0; /* reset */ |
| 107 |
if (key_ot == GPGME_VALIDITY_FULL || |
| 108 |
key_ot == GPGME_VALIDITY_ULTIMATE) |
| 109 |
s = _("Signature status: created with a fully trusted key"); |
| 110 |
else if (key_ot == GPGME_VALIDITY_MARGINAL) |
| 111 |
s = _("Signature status: created with a marginal trusted key"); |
| 112 |
else if (key_ot == GPGME_VALIDITY_NEVER) { |
| 113 |
if (novalid) |
| 114 |
*novalid = 1; |
| 115 |
s = _("Signature status: created with an UNTRUSTED key"); |
| 116 |
} |
| 117 |
else |
| 118 |
s = _("Signature status: created with an undefined trusted key"); |
| 119 |
return s; |
| 120 |
} |
| 121 |
|
| 122 |
|
| 123 |
/* Return a signature specific header and footer for the clipboard. */ |
| 124 |
void |
| 125 |
verify_get_clip_info (gpgme_signature_t sig, char **r_header, char **r_footer) |
| 126 |
{ |
| 127 |
struct winpt_key_s pk; |
| 128 |
const char *head = _("*** PGP SIGNATURE VERIFICATION ***\r\n" |
| 129 |
"*** Signature made: %s\r\n" |
| 130 |
"*** Signature verfied: %s\r\n" |
| 131 |
"*** %s\r\n" |
| 132 |
"*** Signature result: %s\r\n" |
| 133 |
"*** Signer: %s (0x%s)\r\n" |
| 134 |
"*** BEGIN PGP DECRYPTED TEXT ***\r\n"); |
| 135 |
const char *foot = _("\r\n*** END PGP DECRYPTED TEXT ***"); |
| 136 |
const char *stat, *ot, *uid, *keyid; |
| 137 |
char made[128], ver[128]; |
| 138 |
char *p; |
| 139 |
|
| 140 |
if (winpt_get_pubkey (sig->fpr, &pk)) { |
| 141 |
uid = _("user ID not found"); |
| 142 |
ot = verify_get_key_ownertrust (GPGME_VALIDITY_UNDEFINED, NULL); |
| 143 |
} |
| 144 |
else { |
| 145 |
uid = pk.ext->uids->uid; |
| 146 |
ot = verify_get_key_ownertrust (pk.ctx->owner_trust, NULL); |
| 147 |
} |
| 148 |
|
| 149 |
if (!get_locale_timedate (sig->timestamp, made, DIM (made)-1)) |
| 150 |
_snprintf (made, DIM (made)-1, "'unknown time'"); |
| 151 |
if (!get_locale_timedate (time (NULL), ver, DIM (ver)-1)) |
| 152 |
_snprintf (ver, DIM (ver)-1, "'unknown time'"); |
| 153 |
stat = get_gpg_sigstat (sig->summary); |
| 154 |
p = new char[strlen (head) + strlen (stat) + strlen (made) + |
| 155 |
strlen (sig->fpr) + strlen (ot) + strlen (ver) + |
| 156 |
strlen (uid) + 1]; |
| 157 |
if (!p) |
| 158 |
BUG (0); |
| 159 |
if (strlen (sig->fpr) == 32) { /* RSA:MD5 */ |
| 160 |
if (pk.ext != NULL) |
| 161 |
keyid = pk.ext->key->subkeys->keyid+8; |
| 162 |
else |
| 163 |
keyid = sig->fpr; /* show the fingerprint in case of problems. */ |
| 164 |
} |
| 165 |
else |
| 166 |
keyid = get_keyid_from_fpr (sig->fpr); |
| 167 |
sprintf (p, head, made, ver, ot, stat, uid, keyid); |
| 168 |
*r_header = p; |
| 169 |
*r_footer = m_strdup (foot); |
| 170 |
} |
| 171 |
|
| 172 |
|
| 173 |
/* Show a human readable description of the given signature @sig. */ |
| 174 |
void |
| 175 |
verify_show_signature_state (gpgme_signature_t sig) |
| 176 |
{ |
| 177 |
winpt_key_s key; |
| 178 |
const char *keyid, *uid; |
| 179 |
const char *s; |
| 180 |
char *pka_info = NULL, timebuf[128]; |
| 181 |
int novalid = 0; |
| 182 |
|
| 183 |
assert (sig->fpr != NULL); |
| 184 |
|
| 185 |
memset (&key, 0, sizeof (key)); |
| 186 |
if (!winpt_get_pubkey (sig->fpr, &key)) { |
| 187 |
s = verify_get_key_ownertrust (key.ctx->owner_trust, &novalid); |
| 188 |
uid = key.ext->uids->uid; |
| 189 |
} |
| 190 |
else { |
| 191 |
s = ""; |
| 192 |
uid = _("user ID not found"); |
| 193 |
} |
| 194 |
|
| 195 |
if (!get_locale_timedate (sig->timestamp, timebuf, DIM (timebuf)-1)) |
| 196 |
_snprintf (timebuf, DIM (timebuf)-1, "'unknown time'"); |
| 197 |
|
| 198 |
if (strlen (sig->fpr) == 32) { |
| 199 |
if (key.ctx != NULL) |
| 200 |
keyid = key.ctx->subkeys->keyid+8; |
| 201 |
else |
| 202 |
keyid = sig->fpr; /* in case of problems show the fingerprint. */ |
| 203 |
} |
| 204 |
else |
| 205 |
keyid = get_keyid_from_fpr (sig->fpr); |
| 206 |
|
| 207 |
pka_info = get_pka_status (sig); |
| 208 |
log_box (_("Decrypt Verify"), novalid? MB_WARN : MB_OK, |
| 209 |
_("%s\n" |
| 210 |
"%s\n" |
| 211 |
"Signature made: %s\n" |
| 212 |
"From \"%s\" using key ID 0x%s" |
| 213 |
"%s %s\n%s"), |
| 214 |
s, get_gpg_sigstat (sig->summary), |
| 215 |
timebuf, uid, keyid, |
| 216 |
novalid? "\nPrimary key fingerprint: " : "", |
| 217 |
novalid? get_key_fpr (key.ctx) : "", |
| 218 |
pka_info? pka_info : "" |
| 219 |
); |
| 220 |
free_if_alloc (pka_info); |
| 221 |
winpt_release_pubkey (&key); |
| 222 |
} |
| 223 |
|
| 224 |
|
| 225 |
/* Convenient function to provide clipboard decryption. |
| 226 |
@hwnd is the parent window used for showing messsages. |
| 227 |
Return value: 0 on success. */ |
| 228 |
gpgme_error_t |
| 229 |
clip_decrypt_dlg (HWND hwnd, int use_viewer) |
| 230 |
{ |
| 231 |
gpgme_error_t err; |
| 232 |
gpgme_ctx_t ctx = NULL; |
| 233 |
gpgme_decrypt_result_t res; |
| 234 |
gpgme_verify_result_t sigres; |
| 235 |
passphrase_cb_s pwd; |
| 236 |
int pgp_type = 0; |
| 237 |
|
| 238 |
/* allow to verify data generated by 'gpg -a --sign foo' */ |
| 239 |
if (fm_assume_onepass_sig (NULL) == 1) { |
| 240 |
dialog_box_param (glob_hinst, (LPCSTR)IDD_WINPT_VERIFY, hwnd, |
| 241 |
clip_verify_dlg_proc, 0, |
| 242 |
_("Verify"), IDS_WINPT_VERIFY); |
| 243 |
return 0; |
| 244 |
} |
| 245 |
|
| 246 |
err = gpgme_new (&ctx); |
| 247 |
if (err) |
| 248 |
BUG (NULL); |
| 249 |
set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_DECRYPT, hwnd, _("Decryption")); |
| 250 |
gpg_get_recipients (NULL, &pwd.recipients); |
| 251 |
|
| 252 |
err = gpgme_op_clip_decrypt (ctx); |
| 253 |
if (pwd.cancel) |
| 254 |
goto leave; |
| 255 |
if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) |
| 256 |
agent_del_cache (pwd.keyid); |
| 257 |
|
| 258 |
res = gpgme_op_decrypt_result (ctx); |
| 259 |
if (err && res->recipients && !is_seckey_available (res->recipients)) { |
| 260 |
gpgme_recipient_t r = res->recipients; |
| 261 |
char *u = get_key_userid (r->keyid+8); |
| 262 |
log_box (_("Decryption"), MB_ERR, |
| 263 |
_("Encrypted with %s key, ID 0x%s.%s\n" |
| 264 |
"Decryption failed: secret key not available."), |
| 265 |
get_key_pubalgo (r->pubkey_algo), r->keyid+8, u); |
| 266 |
free_if_alloc (u); |
| 267 |
goto leave; |
| 268 |
} |
| 269 |
else if (res->unsupported_algorithm) { |
| 270 |
log_box (_("Decryption"), MB_ERR, _("Unsupported algorithm: %s"), |
| 271 |
res->unsupported_algorithm); |
| 272 |
} |
| 273 |
else if (err) { |
| 274 |
gpg_clip_get_pgptype (&pgp_type); |
| 275 |
if (gpgme_err_code (err) == GPG_ERR_NO_DATA && (pgp_type & PGP_MESSAGE)) |
| 276 |
msg_box (hwnd, _("Broken OpenPGP message (maybe: quoted printable " |
| 277 |
"character in armor)."), _("Decryption"), MB_INFO); |
| 278 |
else |
| 279 |
msg_box (hwnd, gpgme_strerror (err), _("Decryption"), MB_ERR); |
| 280 |
goto leave; |
| 281 |
} |
| 282 |
|
| 283 |
show_msg (GetDesktopWindow (), 1500, _("GnuPG Status: Finished")); |
| 284 |
|
| 285 |
sigres = gpgme_op_verify_result (ctx); |
| 286 |
if (sigres && sigres->signatures) { |
| 287 |
if (!use_viewer) |
| 288 |
verify_show_signature_state (sigres->signatures); |
| 289 |
else |
| 290 |
DialogBoxParam (glob_hinst, (LPCTSTR)IDD_WINPT_CLIPEDIT, |
| 291 |
hwnd, clip_edit_dlg_proc, |
| 292 |
(LPARAM)sigres->signatures); |
| 293 |
} |
| 294 |
else if (use_viewer) |
| 295 |
DialogBoxParam (glob_hinst, (LPCTSTR)IDD_WINPT_CLIPEDIT, |
| 296 |
hwnd, clip_edit_dlg_proc, 0); |
| 297 |
|
| 298 |
leave: |
| 299 |
release_gpg_passphrase_cb (&pwd); |
| 300 |
gpgme_release (ctx); |
| 301 |
return err; |
| 302 |
} |
Parent Directory
| 
Revision Log