| 1 |
/* OECrypto.c - OE crypto functions |
| 2 |
* Copyright (C) 2001, 2002, 2003, 2006 Timo Schulz |
| 3 |
* |
| 4 |
* This file is part of GPGOE. |
| 5 |
* |
| 6 |
* GPGOE is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU Lesser General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2.1 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* GPGOE 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 Lesser General Public License |
| 17 |
* along with GPGOE; if not, write to the Free Software Foundation, |
| 18 |
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#ifdef HAVE_CONFIG_H |
| 22 |
#include <config.h> |
| 23 |
#endif |
| 24 |
#include <windows.h> |
| 25 |
#include <assert.h> |
| 26 |
#include <commctrl.h> |
| 27 |
|
| 28 |
#include "resource.h" |
| 29 |
#include "gpgme.h" |
| 30 |
#include "GPGOE.h" |
| 31 |
|
| 32 |
|
| 33 |
/* Valid OpenPGP message types. */ |
| 34 |
enum { |
| 35 |
PGP_MESSAGE = 1, |
| 36 |
PGP_CLEARSIG = 2, |
| 37 |
PGP_SIG = 4, |
| 38 |
PGP_KEY = 8, |
| 39 |
}; |
| 40 |
|
| 41 |
|
| 42 |
/* Move the keyboard focus to the message window |
| 43 |
to copy the text to the clipboard. */ |
| 44 |
static void |
| 45 |
set_focus (HWND main) |
| 46 |
{ |
| 47 |
HWND doc, mime, msg; |
| 48 |
|
| 49 |
doc = FindWindowEx (main, NULL, "ME_DocHost", NULL ); |
| 50 |
mime = FindWindowEx (doc, NULL, "##MimeEdit_Server", NULL); |
| 51 |
msg = FindWindowEx (mime, NULL, "Internet Explorer_Server", NULL); |
| 52 |
|
| 53 |
AttachThreadInput (GetCurrentThreadId (), |
| 54 |
GetWindowThreadProcessId (main, NULL), |
| 55 |
TRUE); |
| 56 |
|
| 57 |
SetFocus (doc); |
| 58 |
SetFocus (mime); |
| 59 |
SetFocus (msg); |
| 60 |
|
| 61 |
AttachThreadInput (GetCurrentThreadId (), |
| 62 |
GetWindowThreadProcessId (main, NULL), |
| 63 |
FALSE); |
| 64 |
} |
| 65 |
|
| 66 |
|
| 67 |
/* Copy the message to the clipboard and then return the clipboard |
| 68 |
data (which is the message). */ |
| 69 |
static char* |
| 70 |
window_get_message (HWND main_hwnd) |
| 71 |
{ |
| 72 |
set_focus (main_hwnd); |
| 73 |
SetForegroundWindow (main_hwnd); |
| 74 |
SendMessage (main_hwnd, WM_COMMAND, MAKEWPARAM (ID_OE_SELECTALL, 0), 0); |
| 75 |
SendMessage (main_hwnd, WM_COMMAND, MAKEWPARAM (ID_OE_COPY, 0), 0); |
| 76 |
|
| 77 |
/* even so SendMessage() should wait, we wait for safety reasons. */ |
| 78 |
Sleep (200); |
| 79 |
return get_clip_text (NULL); |
| 80 |
} |
| 81 |
|
| 82 |
|
| 83 |
/* Paste the message given in @msg into the window @main_hwnd. |
| 84 |
To make sure all existing text is overwritten, "select all" |
| 85 |
is send to the window first. */ |
| 86 |
static void |
| 87 |
window_set_message (HWND main_hwnd, const char *msg) |
| 88 |
{ |
| 89 |
set_clip_text (NULL, msg, strlen (msg)); |
| 90 |
set_focus (main_hwnd); |
| 91 |
SetForegroundWindow (main_hwnd); |
| 92 |
SendMessage (main_hwnd, WM_COMMAND, MAKEWPARAM (ID_OE_SELECTALL, 0), 0); |
| 93 |
SendMessage (main_hwnd, WM_COMMAND, MAKEWPARAM (ID_OE_PASTE, 0), 0); |
| 94 |
} |
| 95 |
|
| 96 |
|
| 97 |
/* Try to find the given recipient by key @key and |
| 98 |
return it (NULL in case of error). */ |
| 99 |
static recip_list_t |
| 100 |
find_recipient (recip_list_t rset, gpgme_key_t key) |
| 101 |
{ |
| 102 |
recip_list_t n; |
| 103 |
gpgme_user_id_t u; |
| 104 |
|
| 105 |
for (n = rset; n; n = n->next) { |
| 106 |
for (u = key->uids; u; u = u->next) { |
| 107 |
if (u->email && strstr (u->email, n->addr)) |
| 108 |
return n; |
| 109 |
} |
| 110 |
} |
| 111 |
return NULL; |
| 112 |
} |
| 113 |
|
| 114 |
|
| 115 |
/* Add recipient with address @addr and key @key to @rset. */ |
| 116 |
void |
| 117 |
add_recipient (recip_list_t *rset, const char *addr, gpgme_key_t key) |
| 118 |
{ |
| 119 |
recip_list_t r, n; |
| 120 |
|
| 121 |
r = xcalloc (1, sizeof *r); |
| 122 |
r->addr = xstrdup (addr); |
| 123 |
r->key = key; |
| 124 |
if (!*rset) |
| 125 |
*rset = r; |
| 126 |
else { |
| 127 |
for (n=*rset; n->next; n=n->next) |
| 128 |
; |
| 129 |
n->next = r; |
| 130 |
} |
| 131 |
} |
| 132 |
|
| 133 |
|
| 134 |
/* Release recipient list @rset. */ |
| 135 |
static void |
| 136 |
release_recipient (recip_list_t rset) |
| 137 |
{ |
| 138 |
recip_list_t n; |
| 139 |
|
| 140 |
while (rset != NULL) { |
| 141 |
n = rset->next; |
| 142 |
if (rset->key) |
| 143 |
gpgme_key_release (rset->key); |
| 144 |
free_if_alloc (rset->addr); |
| 145 |
free_if_alloc (rset); |
| 146 |
rset = n; |
| 147 |
} |
| 148 |
} |
| 149 |
|
| 150 |
|
| 151 |
/* This functions converts the OE recipient fields to GPG compatible fields. |
| 152 |
Currently the function support the following 'From' styles: |
| 153 |
John Hacker <[email protected]>; [email protected] |
| 154 |
or Foo Bar <[email protected]>, [email protected]. |
| 155 |
only the part between '<' '>' are added. |
| 156 |
*/ |
| 157 |
static int |
| 158 |
parse_recipients (plugin_ctx_t ctx, recip_list_t *rset, char *recpt) |
| 159 |
{ |
| 160 |
char *token, *p; |
| 161 |
int count = 0; |
| 162 |
char *p1, *p2; |
| 163 |
int n1, n2; |
| 164 |
|
| 165 |
assert (recpt && rset); |
| 166 |
|
| 167 |
token = strtok (recpt, ",;"); |
| 168 |
while (token != NULL ) { |
| 169 |
if ((p1=strchr (token, '<')) && (p2=strchr (token, '>')) |
| 170 |
&& strchr (token, '@')) { |
| 171 |
n1 = p1 - token + 1 ; |
| 172 |
n2 = p2 - token + 1; |
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|
| 174 |
p = xcalloc (1, strlen (token) + 1); |
| 175 |
memcpy (p, token+n1, n2-n1-1); |
| 176 |
add_recipient (rset, p, NULL); |
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count++; |
| 178 |
free_if_alloc (p); |
| 179 |
} |
| 180 |
else if (strchr (token, '@') && !strchr (token, ' ')) { |
| 181 |
p = xcalloc (1, strlen (token) + 1); |
| 182 |
memcpy (p, token, strlen (token)); |
| 183 |
add_recipient (rset, p, NULL); |
| 184 |
count++; |
| 185 |
free_if_alloc (p); |
| 186 |
} |
| 187 |
token = strtok (NULL, ",;"); |
| 188 |
} |
| 189 |
return count; |
| 190 |
} |
| 191 |
|
| 192 |
|
| 193 |
/* Fill in the key part of the recipient list @addrs if possible. */ |
| 194 |
static int |
| 195 |
get_keys_from_addresses (recip_list_t addrs) |
| 196 |
{ |
| 197 |
gpgme_ctx_t ctx; |
| 198 |
gpgme_error_t err; |
| 199 |
gpgme_key_t pk; |
| 200 |
recip_list_t n, fnd; |
| 201 |
char *p; |
| 202 |
int nkeys=0; |
| 203 |
DWORD len=0; |
| 204 |
|
| 205 |
for (n = addrs; n; n = n->next) |
| 206 |
len += strlen (n->addr) + 3; |
| 207 |
p = xcalloc (1, len + 1); |
| 208 |
for (n = addrs; n; n = n->next) { |
| 209 |
strcat (p, n->addr); |
| 210 |
strcat (p, " "); |
| 211 |
} |
| 212 |
|
| 213 |
err = gpgme_new (&ctx); |
| 214 |
if (!err) |
| 215 |
err = gpgme_op_keylist_start (ctx, p, 0); |
| 216 |
while (!err) { |
| 217 |
err = gpgme_op_keylist_next (ctx, &pk); |
| 218 |
if (err) |
| 219 |
break; |
| 220 |
/* do not add invalid keys. */ |
| 221 |
if (pk->disabled || pk->expired || pk->revoked) |
| 222 |
continue; |
| 223 |
fnd = find_recipient (addrs, pk); |
| 224 |
if (fnd != NULL && pk->can_encrypt) { |
| 225 |
fnd->key = pk; |
| 226 |
nkeys++; |
| 227 |
} |
| 228 |
} |
| 229 |
|
| 230 |
gpgme_release (ctx); |
| 231 |
free_if_alloc (p); |
| 232 |
return nkeys; |
| 233 |
} |
| 234 |
|
| 235 |
|
| 236 |
/* Create gpgme input data object. If @encode is 1, use UTF8 conversion. */ |
| 237 |
gpgme_error_t |
| 238 |
create_in_data (gpgme_data_t *in, const char *buf, int encode) |
| 239 |
{ |
| 240 |
gpgme_error_t err; |
| 241 |
char *enc_buf; |
| 242 |
|
| 243 |
enc_buf = encode? native_to_utf8 (buf) : xstrdup (buf); |
| 244 |
err = gpgme_data_new_from_mem (in, enc_buf, strlen (enc_buf), 1); |
| 245 |
free_if_alloc (enc_buf); |
| 246 |
return err; |
| 247 |
} |
| 248 |
|
| 249 |
|
| 250 |
/* Map gpgme data object to a string. */ |
| 251 |
void |
| 252 |
map_gpgme_data (gpgme_data_t out, char **r_msg) |
| 253 |
{ |
| 254 |
size_t len = 0; |
| 255 |
char *p; |
| 256 |
|
| 257 |
p = gpgme_data_release_and_get_mem (out, &len); |
| 258 |
free_if_alloc (*r_msg); |
| 259 |
*r_msg = xcalloc (1, len+1); |
| 260 |
memcpy (*r_msg, p, len); |
| 261 |
gpgme_free (p); |
| 262 |
} |
| 263 |
|
| 264 |
|
| 265 |
/* Try to extract the needed key information and retrieve |
| 266 |
the keys if possible. */ |
| 267 |
static gpgme_error_t |
| 268 |
get_keys (plugin_ctx_t ctx, recip_list_t *r_list, gpgme_key_t **r_keys) |
| 269 |
{ |
| 270 |
gpgme_key_t *keys; |
| 271 |
recip_list_t addrs = NULL, n; |
| 272 |
int rcount = 0, nkeys = 0; |
| 273 |
int i; |
| 274 |
|
| 275 |
if (ctx->to && strlen (ctx->to) >= 3) |
| 276 |
rcount += parse_recipients (ctx, &addrs, ctx->to); |
| 277 |
if (ctx->cc && strlen (ctx->cc) >= 3) |
| 278 |
rcount += parse_recipients (ctx, &addrs, ctx->cc); |
| 279 |
if (ctx->bcc && strlen (ctx->bcc) >= 3) |
| 280 |
rcount += parse_recipients (ctx, &addrs, ctx->bcc); |
| 281 |
|
| 282 |
nkeys = get_keys_from_addresses (addrs); |
| 283 |
/* at least some keys were not found, so we offer to select them. */ |
| 284 |
if (nkeys != rcount) { |
| 285 |
ctx->rset = addrs; |
| 286 |
rcount = DialogBoxParam (mod_hinst_dll, (LPCTSTR)IDD_ENCRYPT, |
| 287 |
ctx->main_wnd, encrypt_dlg_proc, (LPARAM)ctx); |
| 288 |
if (rcount == 0) |
| 289 |
return gpg_error (GPG_ERR_NO_PUBKEY); |
| 290 |
nkeys += rcount; |
| 291 |
} |
| 292 |
|
| 293 |
keys = xcalloc (nkeys+1, sizeof *keys); |
| 294 |
for (n = addrs, i=0; n; n = n->next) { |
| 295 |
if (n->key != NULL) |
| 296 |
keys[i++] = n->key; |
| 297 |
} |
| 298 |
*r_list = addrs; |
| 299 |
*r_keys = keys; |
| 300 |
return 0; |
| 301 |
} |
| 302 |
|
| 303 |
|
| 304 |
/* Encrypt the given message @r_msg with the recipients from the |
| 305 |
To, Cc, Bcc fields. In case that a recipient was not found |
| 306 |
use the recipient dialog so the user can select the missing keys. */ |
| 307 |
static gpgme_error_t |
| 308 |
encrypt_msg (plugin_ctx_t ctx, char **r_msg) |
| 309 |
{ |
| 310 |
gpgme_error_t err; |
| 311 |
gpgme_key_t *keys = NULL; |
| 312 |
gpgme_ctx_t gctx = NULL; |
| 313 |
gpgme_data_t in = NULL, out = NULL; |
| 314 |
recip_list_t list = NULL; |
| 315 |
char *msg = *r_msg; |
| 316 |
|
| 317 |
assert (ctx); |
| 318 |
|
| 319 |
err = get_keys (ctx, &list, &keys); |
| 320 |
if (err) |
| 321 |
return err; |
| 322 |
|
| 323 |
err = gpgme_new (&gctx); |
| 324 |
if (!err) |
| 325 |
err = create_in_data (&in, msg, ctx->use_utf8); |
| 326 |
if (!err) |
| 327 |
err = gpgme_data_new (&out); |
| 328 |
if (!err) { |
| 329 |
gpgme_set_armor (gctx, 1); |
| 330 |
gpgme_set_textmode (gctx, 1); |
| 331 |
err = gpgme_op_encrypt (gctx, keys, |
| 332 |
GPGME_ENCRYPT_ALWAYS_TRUST, in, out); |
| 333 |
} |
| 334 |
|
| 335 |
gpgme_release (gctx); |
| 336 |
gpgme_data_release (in); |
| 337 |
release_recipient (list); |
| 338 |
free_if_alloc (keys); |
| 339 |
|
| 340 |
if (err) |
| 341 |
gpgme_data_release (out); |
| 342 |
else |
| 343 |
map_gpgme_data (out, r_msg); |
| 344 |
return err; |
| 345 |
} |
| 346 |
|
| 347 |
|
| 348 |
/* Sign the message given in @r_msg with the GPG default key. */ |
| 349 |
static gpgme_error_t |
| 350 |
sign_msg (plugin_ctx_t ctx, char **r_msg) |
| 351 |
{ |
| 352 |
gpgme_error_t err; |
| 353 |
gpgme_ctx_t gctx; |
| 354 |
gpgme_data_t in, out; |
| 355 |
pass_cb_t cb_val; |
| 356 |
int cancel; |
| 357 |
|
| 358 |
cb_val = new_pass_cb (ctx->main_wnd); |
| 359 |
|
| 360 |
err = gpgme_new (&gctx); |
| 361 |
if (!err) |
| 362 |
err = gpgme_data_new_from_mem (&in, *r_msg, strlen (*r_msg), 1); |
| 363 |
if (!err) |
| 364 |
err = gpgme_data_new (&out); |
| 365 |
if (!err) { |
| 366 |
gpgme_set_passphrase_cb (gctx, passphrase_cb, cb_val); |
| 367 |
err = gpgme_op_sign (gctx, in, out, GPGME_SIG_MODE_CLEAR); |
| 368 |
} |
| 369 |
|
| 370 |
cancel = pass_cb_cancelled (cb_val); |
| 371 |
|
| 372 |
gpgme_release (gctx); |
| 373 |
gpgme_data_release (in); |
| 374 |
free_pass_cb (cb_val); |
| 375 |
|
| 376 |
if (err || cancel) |
| 377 |
gpgme_data_release (out); |
| 378 |
else |
| 379 |
map_gpgme_data (out, r_msg); |
| 380 |
|
| 381 |
return cancel? 0 : err; |
| 382 |
} |
| 383 |
|
| 384 |
|
| 385 |
static void |
| 386 |
start_verify_dialog (HWND main_wnd, gpgme_signature_t sig, gpgme_data_t text) |
| 387 |
{ |
| 388 |
struct verify_ctx_s ctx; |
| 389 |
|
| 390 |
if (!sig) |
| 391 |
return; |
| 392 |
memset (&ctx, 0, sizeof (ctx)); |
| 393 |
ctx.sig = sig; |
| 394 |
ctx.text = text; |
| 395 |
DialogBoxParam (mod_hinst_dll, (LPCTSTR)IDD_VERIFY, main_wnd, |
| 396 |
verify_dlg_proc, (LPARAM)&ctx); |
| 397 |
} |
| 398 |
|
| 399 |
|
| 400 |
/* Sign and encrypt the message @r_msg. */ |
| 401 |
static gpgme_error_t |
| 402 |
sign_encrypt_msg (plugin_ctx_t ctx, char **r_msg) |
| 403 |
{ |
| 404 |
gpgme_ctx_t gctx; |
| 405 |
gpgme_data_t in, out; |
| 406 |
gpgme_error_t err; |
| 407 |
gpgme_key_t *keys; |
| 408 |
pass_cb_t cb_val; |
| 409 |
recip_list_t list = NULL; |
| 410 |
int cancel; |
| 411 |
|
| 412 |
err = get_keys (ctx, &list, &keys); |
| 413 |
if (err) |
| 414 |
return err; |
| 415 |
|
| 416 |
cb_val = new_pass_cb (ctx->main_wnd); |
| 417 |
|
| 418 |
err = gpgme_new (&gctx); |
| 419 |
if (!err) |
| 420 |
err = create_in_data (&in, *r_msg, ctx->use_utf8); |
| 421 |
if (!err) |
| 422 |
err = gpgme_data_new (&out); |
| 423 |
if (!err) { |
| 424 |
gpgme_set_armor (gctx, 1); |
| 425 |
gpgme_set_textmode (gctx, 1); |
| 426 |
gpgme_set_passphrase_cb (gctx, passphrase_cb, cb_val); |
| 427 |
err = gpgme_op_encrypt_sign (gctx, keys, GPGME_ENCRYPT_ALWAYS_TRUST, |
| 428 |
in, out); |
| 429 |
} |
| 430 |
|
| 431 |
cancel = pass_cb_cancelled (cb_val); |
| 432 |
|
| 433 |
gpgme_release (gctx); |
| 434 |
gpgme_data_release (in); |
| 435 |
release_recipient (list); |
| 436 |
free_if_alloc (keys); |
| 437 |
free_pass_cb (cb_val); |
| 438 |
|
| 439 |
if (err || cancel) |
| 440 |
gpgme_data_release (out); |
| 441 |
else |
| 442 |
map_gpgme_data (out, r_msg); |
| 443 |
return cancel? 0 : err; |
| 444 |
} |
| 445 |
|
| 446 |
|
| 447 |
static gpgme_error_t |
| 448 |
verify_msg (plugin_ctx_t ctx, char **r_msg) |
| 449 |
{ |
| 450 |
gpgme_error_t err; |
| 451 |
gpgme_ctx_t gctx; |
| 452 |
gpgme_data_t out = NULL; |
| 453 |
gpgme_data_t sig = NULL; |
| 454 |
gpgme_verify_result_t res; |
| 455 |
|
| 456 |
err = gpgme_new (&gctx); |
| 457 |
if (!err) |
| 458 |
err = gpgme_data_new_from_mem (&sig, *r_msg, strlen (*r_msg), 1); |
| 459 |
if (!err) |
| 460 |
err = gpgme_data_new (&out); |
| 461 |
if (!err) |
| 462 |
err = gpgme_op_verify (gctx, sig, NULL, out); |
| 463 |
if (!err) { |
| 464 |
res = gpgme_op_verify_result (gctx); |
| 465 |
if (res && res->signatures) |
| 466 |
start_verify_dialog (ctx->main_wnd, res->signatures, out); |
| 467 |
} |
| 468 |
|
| 469 |
gpgme_release (gctx); |
| 470 |
gpgme_data_release (sig); |
| 471 |
|
| 472 |
if (!err) |
| 473 |
map_gpgme_data (out, r_msg); |
| 474 |
else |
| 475 |
gpgme_data_release (out); |
| 476 |
return err; |
| 477 |
} |
| 478 |
|
| 479 |
|
| 480 |
/* Detailed error message when the decryption failed. */ |
| 481 |
static void |
| 482 |
store_decrypt_info (char *buf, size_t buflen, |
| 483 |
gpgme_decrypt_result_t res) |
| 484 |
{ |
| 485 |
gpgme_key_t key = NULL; |
| 486 |
gpgme_ctx_t ctx; |
| 487 |
int algo; |
| 488 |
|
| 489 |
if (!res->recipients) |
| 490 |
return; |
| 491 |
|
| 492 |
if (!gpgme_new (&ctx)) { |
| 493 |
gpgme_get_key (ctx, res->recipients->keyid, &key, 0); |
| 494 |
gpgme_release (ctx); |
| 495 |
} |
| 496 |
|
| 497 |
algo = res->recipients->pubkey_algo; |
| 498 |
if (!key) |
| 499 |
_snprintf (buf, buflen, _("encrypted with %s key, ID %s\n" |
| 500 |
"decryption failed: secret key not available"), |
| 501 |
algo == 1? "RSA" : algo==16? "ELG": "???", |
| 502 |
res->recipients->keyid+8); |
| 503 |
else { |
| 504 |
char *uid = utf8_to_native (key->uids->uid); |
| 505 |
_snprintf (buf, buflen, _("encrypted with %d-bit %s key, ID %s\n" |
| 506 |
"\t\"%s\"\n" |
| 507 |
"decryption failed: secret key not available"), |
| 508 |
key->subkeys->length, |
| 509 |
algo == 1? "RSA" : algo==16? "ELG": "???", |
| 510 |
key->subkeys->keyid+8, uid); |
| 511 |
free_if_alloc (uid); |
| 512 |
} |
| 513 |
if (key) |
| 514 |
gpgme_key_release (key); |
| 515 |
} |
| 516 |
|
| 517 |
|
| 518 |
/* Decrypt the message given in @r_msg. |
| 519 |
The old message will be freed and replaced with the plaintext. */ |
| 520 |
gpgme_error_t |
| 521 |
oe_decrypt_msg (HWND main_wnd, char **r_msg) |
| 522 |
{ |
| 523 |
gpgme_ctx_t gctx = NULL; |
| 524 |
gpgme_data_t in = NULL, out = NULL; |
| 525 |
gpgme_error_t err; |
| 526 |
pass_cb_t cb_val; |
| 527 |
int cancel; |
| 528 |
char *msg = *r_msg; |
| 529 |
|
| 530 |
cb_val = new_pass_cb (main_wnd); |
| 531 |
err = gpgme_new (&gctx); |
| 532 |
if (!err) |
| 533 |
err = gpgme_data_new_from_mem (&in, msg, strlen (msg), 1); |
| 534 |
if (!err) |
| 535 |
err = gpgme_data_new (&out); |
| 536 |
if (!err) { |
| 537 |
gpgme_set_passphrase_cb (gctx, passphrase_cb, cb_val); |
| 538 |
err = gpgme_op_decrypt (gctx, in, out); |
| 539 |
} |
| 540 |
|
| 541 |
cancel = pass_cb_cancelled (cb_val); |
| 542 |
|
| 543 |
gpgme_release (gctx); |
| 544 |
gpgme_data_release (in); |
| 545 |
free_pass_cb (cb_val); |
| 546 |
|
| 547 |
if (err || cancel) |
| 548 |
gpgme_data_release (out); |
| 549 |
else |
| 550 |
map_gpgme_data (out, r_msg); |
| 551 |
|
| 552 |
return cancel? 0 : err; |
| 553 |
} |
| 554 |
|
| 555 |
|
| 556 |
/* Decrypt the message @r_msg. If the type @type is actually a signature, |
| 557 |
the verify function is called instead of decryption. */ |
| 558 |
static gpgme_error_t |
| 559 |
decrypt_msg (plugin_ctx_t ctx, char **r_msg, int *type, int *r_cancel) |
| 560 |
{ |
| 561 |
gpgme_ctx_t gctx = NULL; |
| 562 |
gpgme_data_t in = NULL, out = NULL; |
| 563 |
gpgme_error_t err; |
| 564 |
gpgme_verify_result_t res; |
| 565 |
pass_cb_t cb_val; |
| 566 |
char *msg = *r_msg; |
| 567 |
|
| 568 |
if ((*type & PGP_SIG) || (*type & PGP_CLEARSIG)) |
| 569 |
return verify_msg (ctx, r_msg); |
| 570 |
|
| 571 |
cb_val = new_pass_cb (ctx->main_wnd); |
| 572 |
|
| 573 |
err = gpgme_new (&gctx); |
| 574 |
if (!err) |
| 575 |
err = gpgme_data_new_from_mem (&in, msg, strlen (msg), 1); |
| 576 |
if (!err) |
| 577 |
err = gpgme_data_new (&out); |
| 578 |
if (!err) { |
| 579 |
gpgme_set_passphrase_cb (gctx, passphrase_cb, cb_val); |
| 580 |
err = gpgme_op_decrypt_verify (gctx, in, out); |
| 581 |
res = gpgme_op_verify_result (gctx); |
| 582 |
if (res && res->signatures) { |
| 583 |
start_verify_dialog (ctx->main_wnd, res->signatures, out); |
| 584 |
*type |= PGP_SIG; |
| 585 |
} |
| 586 |
} |
| 587 |
*r_cancel = pass_cb_cancelled (cb_val); |
| 588 |
|
| 589 |
if (!*r_cancel && err) { |
| 590 |
gpgme_decrypt_result_t r = gpgme_op_decrypt_result (gctx); |
| 591 |
store_decrypt_info (ctx->errbuf, sizeof (ctx->errbuf)-1, r); |
| 592 |
} |
| 593 |
|
| 594 |
gpgme_release (gctx); |
| 595 |
gpgme_data_release (in); |
| 596 |
free_pass_cb (cb_val); |
| 597 |
|
| 598 |
if (err || *r_cancel) |
| 599 |
gpgme_data_release (out); |
| 600 |
else |
| 601 |
map_gpgme_data (out, r_msg); |
| 602 |
|
| 603 |
return *r_cancel? 0 : err; |
| 604 |
} |
| 605 |
|
| 606 |
|
| 607 |
/* Return what kind of OpenPGP message @msg is. */ |
| 608 |
static int |
| 609 |
parse_pgp_id (const char *msg) |
| 610 |
{ |
| 611 |
int id = 0; |
| 612 |
|
| 613 |
if (strstr (msg, "BEGIN PGP MESSAGE")) |
| 614 |
id |= PGP_MESSAGE; |
| 615 |
if (strstr (msg, "BEGIN PGP PUBLIC KEY") || |
| 616 |
strstr (msg, "BEGIN PGP SECRET KEY") || |
| 617 |
strstr (msg, "BEGIN PGP PRIVATE KEY")) |
| 618 |
id |= PGP_KEY; |
| 619 |
if (strstr (msg, "BEGIN PGP SIGNED MESSAGE")) |
| 620 |
id |= PGP_CLEARSIG; |
| 621 |
return id; |
| 622 |
} |
| 623 |
|
| 624 |
|
| 625 |
static int |
| 626 |
winpt_key_import (void) |
| 627 |
{ |
| 628 |
HWND winpt; |
| 629 |
|
| 630 |
winpt = FindWindow ("WinPT", "WinPT"); |
| 631 |
if (winpt != NULL) { |
| 632 |
PostMessage (winpt, WM_COMMAND, 40014, 0); |
| 633 |
return 0; |
| 634 |
} |
| 635 |
return -1; |
| 636 |
} |
| 637 |
|
| 638 |
|
| 639 |
/* Try to decrypt a PGP/MIME message. */ |
| 640 |
static gpgme_error_t |
| 641 |
oe_handle_pgp_mime_mail (plugin_ctx_t ctx) |
| 642 |
{ |
| 643 |
SetEvent (plugin_active); |
| 644 |
|
| 645 |
/* Select attachment number 0. */ |
| 646 |
AttachThreadInput (GetCurrentThreadId (), |
| 647 |
GetWindowThreadProcessId (ctx->main_wnd, NULL), |
| 648 |
TRUE); |
| 649 |
|
| 650 |
SetFocus (ctx->addr_wnd); |
| 651 |
SetFocus (ctx->attach); |
| 652 |
ListView_SetItemState (ctx->attach, 0, LVIS_SELECTED|LVIS_FOCUSED, |
| 653 |
LVIS_FOCUSED|LVIS_SELECTED); |
| 654 |
|
| 655 |
AttachThreadInput (GetCurrentThreadId (), |
| 656 |
GetWindowThreadProcessId (ctx->main_wnd, NULL), |
| 657 |
FALSE); |
| 658 |
|
| 659 |
SendMessage (ctx->addr_wnd, WM_COMMAND, ID_OE_SAVE_ATT, 0); |
| 660 |
|
| 661 |
ResetEvent (plugin_active); |
| 662 |
|
| 663 |
return 0; |
| 664 |
} |
| 665 |
|
| 666 |
|
| 667 |
/* This function can be use for all kind of OE messages. |
| 668 |
It automatically choose the right procedure to handle the data. */ |
| 669 |
gpgme_error_t |
| 670 |
oe_handle_mail (plugin_ctx_t ctx) |
| 671 |
{ |
| 672 |
gpgme_error_t rc = 0; |
| 673 |
char *msg; |
| 674 |
int msg_type = 0; |
| 675 |
int cancel; |
| 676 |
|
| 677 |
assert (ctx); |
| 678 |
|
| 679 |
msg = window_get_message (ctx->main_wnd); |
| 680 |
#if 0 |
| 681 |
if ((!msg || strlen (msg)) < 2 && |
| 682 |
ctx->attach && ListView_GetItemCount (ctx->attach) == 2) { |
| 683 |
free_if_alloc (msg); |
| 684 |
return oe_handle_pgp_mime_mail (ctx); |
| 685 |
} |
| 686 |
#endif |
| 687 |
if (!msg || strlen (msg) == 2) { |
| 688 |
free_if_alloc (msg); |
| 689 |
return 0; |
| 690 |
} |
| 691 |
|
| 692 |
if (strstr (msg, "-----BEGIN PGP") && |
| 693 |
strstr (msg, "-----END PGP")) |
| 694 |
msg_type = parse_pgp_id (msg); |
| 695 |
|
| 696 |
if (msg_type & PGP_KEY) { |
| 697 |
if (winpt_key_import ()) |
| 698 |
MessageBox (ctx->main_wnd, |
| 699 |
_("This mail contains one or more public or secret keys.\n\n" |
| 700 |
"Please save the mail text in a file to use WinPT to import them."), |
| 701 |
_("GPG Plug-in Info"), MB_ICONINFORMATION|MB_OK); |
| 702 |
} |
| 703 |
else if (msg_type) { |
| 704 |
rc = decrypt_msg (ctx, &msg, &msg_type, &cancel); |
| 705 |
SendMessage (ctx->msg_wnd, WM_CLEAR, 0, 0); |
| 706 |
SendMessage (ctx->msg_wnd, WM_UNDO, 0, 0); |
| 707 |
if (!cancel && !rc && (msg_type & PGP_MESSAGE) && !(msg_type & PGP_SIG) |
| 708 |
&& msg && strlen (msg) > 0) { |
| 709 |
struct viewer_ctx_s viewer; |
| 710 |
viewer.msg = msg; |
| 711 |
viewer.main_wnd = ctx->main_wnd; |
| 712 |
DialogBoxParam (mod_hinst_dll, (LPCTSTR)IDD_VIEWER, ctx->main_wnd, |
| 713 |
viewer_dlg_proc, (LPARAM)&viewer); |
| 714 |
} |
| 715 |
} |
| 716 |
else if (ctx->sign || ctx->encrypt) { |
| 717 |
if (!ctx->to && !ctx->cc && !ctx->bcc) { |
| 718 |
free_if_alloc (msg); |
| 719 |
return gpg_error (GPG_ERR_NO_DATA); |
| 720 |
} |
| 721 |
if (ctx->sign && ctx->encrypt) |
| 722 |
rc = sign_encrypt_msg (ctx, &msg); |
| 723 |
else if (ctx->sign) |
| 724 |
rc = sign_msg (ctx, &msg); |
| 725 |
else if (ctx->encrypt) |
| 726 |
rc = encrypt_msg (ctx, &msg); |
| 727 |
window_set_message (ctx->main_wnd, msg); |
| 728 |
} |
| 729 |
|
| 730 |
free_if_alloc (msg); |
| 731 |
return rc; |
| 732 |
} |
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