| 1 |
/* wptClipboard.cpp - GPG related clipboard functions |
| 2 |
* Copyright (C) 2001, 2002, 2003, 2005, 2006, 2009 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 |
|
| 18 |
#ifdef HAVE_CONFIG_H |
| 19 |
#include <config.h> |
| 20 |
#endif |
| 21 |
|
| 22 |
#include <windows.h> |
| 23 |
#include <gpgme.h> |
| 24 |
|
| 25 |
#include "wptW32API.h" |
| 26 |
#include "wptCrypto.h" |
| 27 |
#include "wptVersion.h" |
| 28 |
#include "wptGPG.h" |
| 29 |
#include "wptTypes.h" |
| 30 |
#include "wptUTF8.h" |
| 31 |
#include "wptErrors.h" |
| 32 |
|
| 33 |
/* Default buffer size. */ |
| 34 |
#define BUFSIZE 192 |
| 35 |
|
| 36 |
gpgme_error_t gpg_data_wrap_lines (gpgme_data_t *r_dh, size_t wraplen); |
| 37 |
|
| 38 |
/* XXX: define clipboard errors. */ |
| 39 |
|
| 40 |
/* Check if the clipboard contains text. @r_val contains |
| 41 |
one text data is available. |
| 42 |
Return value: 0 on success. */ |
| 43 |
gpgme_error_t |
| 44 |
gpg_clip_istext_avail (int *r_val) |
| 45 |
{ |
| 46 |
HANDLE clipmem; |
| 47 |
char *clipdata; |
| 48 |
|
| 49 |
if (!r_val) |
| 50 |
return gpg_error (GPG_ERR_INV_ARG); |
| 51 |
*r_val = 0; |
| 52 |
if (OpenClipboard (NULL) == FALSE) |
| 53 |
return gpg_error (GPG_ERR_INTERNAL); |
| 54 |
|
| 55 |
clipmem = GetClipboardData (CF_TEXT); |
| 56 |
if (!clipmem) { |
| 57 |
CloseClipboard(); |
| 58 |
return gpg_error (GPG_ERR_NO_DATA); |
| 59 |
} |
| 60 |
|
| 61 |
clipdata = (char *) GlobalLock (clipmem); |
| 62 |
if (!clipdata) { |
| 63 |
CloseClipboard (); |
| 64 |
return gpg_error (GPG_ERR_INTERNAL); |
| 65 |
} |
| 66 |
|
| 67 |
if (strlen (clipdata) > 0) |
| 68 |
*r_val = 1; |
| 69 |
GlobalUnlock (clipmem); |
| 70 |
CloseClipboard (); |
| 71 |
return 0; |
| 72 |
} |
| 73 |
|
| 74 |
|
| 75 |
/* Figure out what kind of PGP data is stored in @data. |
| 76 |
@r_type contains the ORed types on success. |
| 77 |
Return value: 0 on success. */ |
| 78 |
gpgme_error_t |
| 79 |
gpg_clip_parse_pgpid (const char *data, int *r_type) |
| 80 |
{ |
| 81 |
int type; |
| 82 |
|
| 83 |
if (!data) |
| 84 |
return gpg_error (GPG_ERR_INV_ARG); |
| 85 |
if (strlen (data) < 19) { |
| 86 |
*r_type = 0; |
| 87 |
return 0; |
| 88 |
} |
| 89 |
type = 0; |
| 90 |
if (strstr (data, "BEGIN PGP MESSAGE")) |
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type |= PGP_MESSAGE; |
| 92 |
if (strstr (data, "BEGIN PGP SIGNED MESSAGE")) |
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type |= PGP_CLEARSIG; |
| 94 |
if (strstr (data, "BEGIN PGP SIGNATURE")) |
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type |= PGP_SIG; |
| 96 |
if (strstr (data, "BEGIN PGP PUBLIC KEY BLOCK")) |
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type |= PGP_PUBKEY; |
| 98 |
if (strstr (data, "BEGIN PGP PRIVATE KEY BLOCK") || |
| 99 |
strstr (data, "BEGIN PGP SECRET KEY BLOCK")) |
| 100 |
type |= PGP_SECKEY; |
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// Actually this is no type but rather a flag to |
| 102 |
// indicate the that the data is 'dash escaped' |
| 103 |
if (strstr (data, "- -----BEGIN")) |
| 104 |
type |= PGP_DASH_ESCAPED; |
| 105 |
*r_type = type; |
| 106 |
return 0; |
| 107 |
} |
| 108 |
|
| 109 |
|
| 110 |
/* Check if the clipboard is already OpenPGP protected. |
| 111 |
@r_type optional returns the type and @r_val contains |
| 112 |
1 for yes. |
| 113 |
Return value: 0 on success. */ |
| 114 |
gpgme_error_t |
| 115 |
gpg_clip_is_secured (int *r_type, int *r_val) |
| 116 |
{ |
| 117 |
HANDLE clipmem; |
| 118 |
char *clipdata; |
| 119 |
|
| 120 |
if (!r_val) |
| 121 |
return gpg_error (GPG_ERR_INV_ARG); |
| 122 |
if (OpenClipboard (NULL) == FALSE) |
| 123 |
return gpg_error (GPG_ERR_INTERNAL); |
| 124 |
clipmem = GetClipboardData (CF_TEXT); |
| 125 |
if (!clipmem) { |
| 126 |
*r_val = 0; |
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CloseClipboard(); |
| 128 |
return gpg_error (GPG_ERR_NO_DATA); |
| 129 |
} |
| 130 |
clipdata = (char *) GlobalLock (clipmem); |
| 131 |
if (!clipdata) { |
| 132 |
*r_val = 0; |
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CloseClipboard(); |
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return gpg_error (GPG_ERR_INTERNAL); |
| 135 |
} |
| 136 |
if (strlen (clipdata) > 32 && |
| 137 |
strstr (clipdata, "-----BEGIN PGP") && |
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strstr (clipdata, "-----END PGP")) |
| 139 |
*r_val = 1; |
| 140 |
GlobalUnlock (clipmem); |
| 141 |
gpg_clip_parse_pgpid (clipdata, r_type); |
| 142 |
CloseClipboard (); |
| 143 |
return gpg_error (GPG_ERR_NO_ERROR); |
| 144 |
} |
| 145 |
|
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|
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/* Return the OpenPGP data format of the clipboard in @r_type. |
| 148 |
Return 0 on success. */ |
| 149 |
gpgme_error_t |
| 150 |
gpg_clip_get_pgptype (int *r_type) |
| 151 |
{ |
| 152 |
HANDLE clipmem; |
| 153 |
char *clipdata; |
| 154 |
|
| 155 |
if (OpenClipboard (NULL) == FALSE) |
| 156 |
return gpg_error (GPG_ERR_INTERNAL); |
| 157 |
clipmem = GetClipboardData (CF_TEXT); |
| 158 |
if (!clipmem) { |
| 159 |
CloseClipboard (); |
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return gpg_error (GPG_ERR_NO_DATA); |
| 161 |
} |
| 162 |
clipdata = (char *)GlobalLock (clipmem); |
| 163 |
if (!clipdata) { |
| 164 |
CloseClipboard (); |
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return gpg_error (GPG_ERR_INTERNAL); |
| 166 |
} |
| 167 |
gpg_clip_parse_pgpid (clipdata, r_type); |
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GlobalUnlock (clipmem); |
| 169 |
CloseClipboard (); |
| 170 |
return gpg_error (GPG_ERR_NO_ERROR); |
| 171 |
} |
| 172 |
|
| 173 |
|
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/* Retrieve the text of the clipboard. |
| 175 |
Return value: the text as a string, NULL otherwise. */ |
| 176 |
static char* |
| 177 |
get_w32_clip_text (void) |
| 178 |
{ |
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char *private_clip; |
| 180 |
char *clip; |
| 181 |
size_t size; |
| 182 |
HANDLE cb; |
| 183 |
|
| 184 |
if (!OpenClipboard (NULL)) |
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return NULL; |
| 186 |
cb = GetClipboardData (CF_TEXT); |
| 187 |
if (!cb) { |
| 188 |
CloseClipboard (); |
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return NULL; |
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} |
| 191 |
private_clip = (char *)GlobalLock (cb); |
| 192 |
if (!private_clip) { |
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CloseClipboard (); |
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return NULL; |
| 195 |
} |
| 196 |
size = strlen (private_clip); |
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clip = new char[size+1]; |
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if (!clip) |
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BUG (NULL); |
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memset (clip, 0, size+1); |
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memcpy (clip, private_clip, size); |
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GlobalUnlock(cb); |
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CloseClipboard (); |
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return clip; |
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} |
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|
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|
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static gpgme_error_t |
| 209 |
set_clip_text(wchar_t *data, size_t size) |
| 210 |
{ |
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if (!OpenClipboard(NULL)) |
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return gpg_error(GPG_ERR_INTERNAL); |
| 213 |
|
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HANDLE cb = GlobalAlloc(GHND, size * sizeof(wchar_t)); |
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wchar_t *ptr = (wchar_t*)GlobalLock(cb); |
| 216 |
if (ptr != NULL) { |
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EmptyClipboard(); |
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memcpy(ptr, data, size * sizeof(wchar_t)); |
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SetClipboardData(CF_UNICODETEXT, cb); |
| 220 |
GlobalUnlock(ptr); |
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} |
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CloseClipboard(); |
| 223 |
GlobalFree(cb); |
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return gpg_error(GPG_ERR_NO_ERROR); |
| 225 |
} |
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|
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|
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/* Set the new clipboard data to @data. */ |
| 229 |
static gpgme_error_t |
| 230 |
set_w32_clip_text (const char *data, int size) |
| 231 |
{ |
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HANDLE cb; |
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char *private_data; |
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|
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if (!OpenClipboard(NULL)) |
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return gpg_error(GPG_ERR_INTERNAL); |
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cb = GlobalAlloc (GHND, size+1); |
| 238 |
if (!cb) |
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BUG (NULL); |
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private_data = (char*)GlobalLock (cb); |
| 241 |
if (private_data != NULL) { |
| 242 |
EmptyClipboard (); |
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memset (private_data, 0, size+1); |
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memcpy (private_data, data, size); |
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SetClipboardData (CF_TEXT, cb); |
| 246 |
GlobalUnlock (cb); |
| 247 |
} |
| 248 |
|
| 249 |
CloseClipboard (); |
| 250 |
GlobalFree (cb); |
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return gpg_error(GPG_ERR_NO_ERROR); |
| 252 |
} |
| 253 |
|
| 254 |
|
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/* Search for the armor header 'Version:' in @r_dh and |
| 256 |
add the WinPT version. On success @r_dh is replaced |
| 257 |
with the modified data. |
| 258 |
Return value: 0 on success. */ |
| 259 |
gpgme_error_t |
| 260 |
gpg_data_change_version (gpgme_data_t *r_dh) |
| 261 |
{ |
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gpgme_error_t err; |
| 263 |
gpgme_data_t mdh; |
| 264 |
const char *s; |
| 265 |
char line[BUFSIZE+256]; |
| 266 |
int found_version, hash_seen; |
| 267 |
int n; |
| 268 |
|
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if (!r_dh) |
| 270 |
return gpg_error (GPG_ERR_INV_ARG); |
| 271 |
|
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err = gpgme_data_new (&mdh); |
| 273 |
if (err) |
| 274 |
return err; |
| 275 |
|
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found_version = 0; |
| 277 |
hash_seen = 0; |
| 278 |
/* Pattern we search for. */ |
| 279 |
s = "Version: GnuPG"; |
| 280 |
gpgme_data_rewind (*r_dh); |
| 281 |
while ((n = gpg_data_readline (*r_dh, line, BUFSIZE-1)) > 0) { |
| 282 |
if (found_version == 0 && !strncmp (line, "Hash:", 5)) { |
| 283 |
// If we found a cleartext signature, we do not add a |
| 284 |
// charset header in the signed area since it would broke |
| 285 |
// the signature |
| 286 |
hash_seen = 1; |
| 287 |
} |
| 288 |
|
| 289 |
if (!strncmp (line, "\r\n", 2) && found_version == 0 && |
| 290 |
hash_seen == 0) { |
| 291 |
// If the user decided she will not tell what client she |
| 292 |
// used, we will also omit the version and just output |
| 293 |
// the charset info |
| 294 |
line[strlen (line)- 2]=0; |
| 295 |
strcat (line, /*"Version: WinPT "PGM_VERSION"\r\n"*/ |
| 296 |
"Charset: UTF-8\r\n" |
| 297 |
"\r\n"); |
| 298 |
found_version = 1; |
| 299 |
} |
| 300 |
if (strlen (line) > strlen (s) && |
| 301 |
!strncmp (line, s, strlen (s)) && |
| 302 |
!stristr (line, "WinPT "PGM_VERSION)) { |
| 303 |
/* Do not assume a \r\n sequence. */ |
| 304 |
if (strstr (line, "\r\n")) |
| 305 |
line[strlen (line) - 2] = '\0'; |
| 306 |
if (strstr (line, "\n")) |
| 307 |
line[strlen (line) - 1] = '\0'; |
| 308 |
// We add a charset header to indicate that the application |
| 309 |
// on the recipients side is able to properly decode it |
| 310 |
strcat (line, " - WinPT "PGM_VERSION"\r\n" |
| 311 |
"Charset: UTF-8\r\n"); |
| 312 |
found_version = 1; |
| 313 |
} |
| 314 |
gpgme_data_write (mdh, line, strlen (line)); |
| 315 |
} |
| 316 |
|
| 317 |
gpgme_data_write (mdh, "", 1); |
| 318 |
gpgme_data_rewind (mdh); |
| 319 |
gpgme_data_release (*r_dh); |
| 320 |
*r_dh = mdh; |
| 321 |
return err; |
| 322 |
} |
| 323 |
|
| 324 |
|
| 325 |
/* The problem is, that it might be also possible that we |
| 326 |
received an ciphertext which is not encoded with UTF-8. |
| 327 |
Thus, we check explicitly for the 'Charset: UTF-8' header. |
| 328 |
If it is not found, we assume a different encoding and |
| 329 |
no decoding is performed. */ |
| 330 |
static int |
| 331 |
has_utf8_charset (gpgme_data_t dh) |
| 332 |
{ |
| 333 |
char buf[BUFSIZE+1]; |
| 334 |
int found = 0; |
| 335 |
|
| 336 |
for (;;) { |
| 337 |
int n = gpg_data_readline (dh, buf, BUFSIZE); |
| 338 |
if (n < 1) |
| 339 |
break; |
| 340 |
// Read until the first blank line, if the |
| 341 |
// header has not been found yet, it does not exist |
| 342 |
if ((n == 1 && buf[0] == '\n') || |
| 343 |
(n == 2 && buf[0] == '\r')) |
| 344 |
break; |
| 345 |
if (!memcmp (buf, "Charset:", 8) && strstr (buf, "UTF-8")) { |
| 346 |
found = 1; |
| 347 |
break; |
| 348 |
} |
| 349 |
} |
| 350 |
|
| 351 |
gpgme_data_rewind (dh); |
| 352 |
return found; |
| 353 |
} |
| 354 |
|
| 355 |
|
| 356 |
/* Retrieve the clipboard data and create a new gpgme |
| 357 |
data object @r_dh and return it. If @wraplen is > 0 |
| 358 |
wrap lines of the buffer. |
| 359 |
Return value: 0 on success. */ |
| 360 |
gpgme_error_t |
| 361 |
gpg_data_new_from_clipboard (gpgme_data_t *r_dh, int wraplen) |
| 362 |
{ |
| 363 |
gpgme_error_t err; |
| 364 |
gpgme_data_t dh; |
| 365 |
char *clip_text = NULL; |
| 366 |
|
| 367 |
if (!r_dh) |
| 368 |
return gpg_error (GPG_ERR_INV_ARG); |
| 369 |
*r_dh = NULL; |
| 370 |
clip_text = get_w32_clip_text (); |
| 371 |
if (!clip_text) |
| 372 |
return gpg_error (GPG_ERR_NO_DATA); |
| 373 |
err = gpgme_data_new_from_mem (&dh, clip_text, strlen (clip_text), 1); |
| 374 |
if (clip_text) |
| 375 |
free (clip_text); |
| 376 |
if (wraplen > 0) |
| 377 |
gpg_data_wrap_lines (&dh, wraplen); |
| 378 |
|
| 379 |
*r_dh = dh; |
| 380 |
return err; |
| 381 |
} |
| 382 |
|
| 383 |
/* Retrieve the clipboard data and create a new gpgme |
| 384 |
data object @r_dh and return it. If @wraplen is > 0 |
| 385 |
wrap lines of the buffer. |
| 386 |
Return value: 0 on success. */ |
| 387 |
gpgme_error_t |
| 388 |
gpg_data_utf8_new_from_clipboard (gpgme_data_t *r_dh, |
| 389 |
int wraplen, int *r_is_utf8) |
| 390 |
{ |
| 391 |
gpgme_error_t err = gpg_error (GPG_ERR_NO_ERROR); |
| 392 |
gpgme_data_t dh; |
| 393 |
char *clip_text, *utf8_text; |
| 394 |
|
| 395 |
if (!r_dh) |
| 396 |
return gpg_error (GPG_ERR_INV_ARG); |
| 397 |
*r_dh = NULL; |
| 398 |
clip_text = get_w32_clip_text (); |
| 399 |
if (!clip_text) |
| 400 |
return gpg_error (GPG_ERR_NO_DATA); |
| 401 |
|
| 402 |
|
| 403 |
/* We automatically encode all clipboard data |
| 404 |
into the UTF-8 format for a portable transportation. */ |
| 405 |
utf8_text = native_to_utf8 (clip_text); |
| 406 |
free_if_alloc (clip_text); clip_text = utf8_text; |
| 407 |
|
| 408 |
err = gpgme_data_new_from_mem (&dh, clip_text, strlen (clip_text), 1); |
| 409 |
free_if_alloc (clip_text); |
| 410 |
if (wraplen > 0) |
| 411 |
gpg_data_wrap_lines (&dh, wraplen); |
| 412 |
|
| 413 |
// for ARMORED data find out if the Charset header is set to UTF8 |
| 414 |
if (r_is_utf8) |
| 415 |
*r_is_utf8 = has_utf8_charset (dh); |
| 416 |
|
| 417 |
*r_dh = dh; |
| 418 |
return err; |
| 419 |
} |
| 420 |
|
| 421 |
|
| 422 |
|
| 423 |
wchar_t* utf8_to_utf16(const char *string, size_t *retlen); |
| 424 |
|
| 425 |
gpgme_error_t |
| 426 |
gpg_data_release_utf8_to_clipboard (gpgme_data_t dh) |
| 427 |
{ |
| 428 |
//char *clip_text; |
| 429 |
char *utf8_text; |
| 430 |
size_t n; |
| 431 |
|
| 432 |
if (!dh) |
| 433 |
return gpg_error (GPG_ERR_INV_ARG); |
| 434 |
|
| 435 |
gpgme_data_write (dh, "", 1); // make sure it's a string! |
| 436 |
utf8_text = gpgme_data_release_and_get_mem (dh, &n); |
| 437 |
if (!utf8_text) |
| 438 |
return gpg_error (GPG_ERR_INV_VALUE); |
| 439 |
if (n < 0) { |
| 440 |
gpgme_free (utf8_text); |
| 441 |
return gpg_error (GPG_ERR_NO_DATA); |
| 442 |
} |
| 443 |
|
| 444 |
/* We assume that all data from GPG is in UTF-8 and |
| 445 |
need to be decoded. If the charset is US-ASCII, |
| 446 |
this wouldn't do any harm, but if the data is ISO-XXX-XX |
| 447 |
we get scrambled output. */ |
| 448 |
utf8_text[n] = '\0'; |
| 449 |
|
| 450 |
size_t nlen = 0; |
| 451 |
wchar_t *dat = utf8_to_utf16(utf8_text, &nlen); |
| 452 |
set_clip_text(dat, nlen); |
| 453 |
wipememory(dat, nlen); |
| 454 |
free_if_alloc(dat); |
| 455 |
|
| 456 |
#if 0 /* old utf8 code */ |
| 457 |
clip_text = utf8_to_native (utf8_text); |
| 458 |
n = strlen(clip_text); |
| 459 |
//set_w32_clip_text (clip_text, n); |
| 460 |
wipememory (clip_text, n); |
| 461 |
free_if_alloc (clip_text); |
| 462 |
#endif |
| 463 |
|
| 464 |
wipememory(utf8_text, n); |
| 465 |
gpgme_free(utf8_text); |
| 466 |
|
| 467 |
return gpg_error (GPG_ERR_NO_ERROR); |
| 468 |
} |
| 469 |
|
| 470 |
|
| 471 |
/* Release a gpgme data object @dh and write the contents of |
| 472 |
the object to the clipboard. If @change_version is set, modify the |
| 473 |
Version: header and add WinPT information. */ |
| 474 |
gpgme_error_t |
| 475 |
gpg_data_release_to_clipboard (gpgme_data_t dh, int change_version) |
| 476 |
{ |
| 477 |
gpgme_data_t in; |
| 478 |
char *clip_text; |
| 479 |
size_t n; |
| 480 |
|
| 481 |
if (!dh) |
| 482 |
return gpg_error (GPG_ERR_INV_ARG); |
| 483 |
|
| 484 |
in = dh; |
| 485 |
if (change_version) |
| 486 |
gpg_data_change_version (&in); |
| 487 |
|
| 488 |
clip_text = gpgme_data_release_and_get_mem (in, &n); |
| 489 |
if (clip_text && *clip_text) { |
| 490 |
set_w32_clip_text (clip_text, n); |
| 491 |
wipememory (clip_text, n); |
| 492 |
gpgme_free (clip_text); |
| 493 |
} |
| 494 |
|
| 495 |
return gpg_error (GPG_ERR_NO_ERROR); |
| 496 |
} |
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