| 1 |
/* decrypt.c - decrypt functions |
| 2 |
* Copyright (C) 2000 Werner Koch (dd9jn) |
| 3 |
* Copyright (C) 2001-2005 Timo Schulz |
| 4 |
* |
| 5 |
* This file is part of MyGPGME. |
| 6 |
* |
| 7 |
* MyGPGME 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 |
* MyGPGME 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 this program; if not, write to the Free Software |
| 19 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 20 |
*/ |
| 21 |
|
| 22 |
#include <stdio.h> |
| 23 |
#include <stdlib.h> |
| 24 |
#include <string.h> |
| 25 |
#include <assert.h> |
| 26 |
#include <windows.h> |
| 27 |
|
| 28 |
#include "util.h" |
| 29 |
#include "context.h" |
| 30 |
#include "ops.h" |
| 31 |
|
| 32 |
struct decrypt_result_s { |
| 33 |
gpgme_sig_t sig; |
| 34 |
int no_data; |
| 35 |
int no_seckey; |
| 36 |
int no_passphrase; |
| 37 |
int idea_cipher; |
| 38 |
int okay; |
| 39 |
int sig_okay; |
| 40 |
int failed; |
| 41 |
int bad_mdc; |
| 42 |
int bad_armor; |
| 43 |
int bad_passphrase; |
| 44 |
int key_algo; |
| 45 |
int file_start; |
| 46 |
int file_done; |
| 47 |
char keyid[16+1]; |
| 48 |
char cardno[32+1]; |
| 49 |
void * last_pw_handle; |
| 50 |
char * userid_hint; |
| 51 |
char * passphrase_info; |
| 52 |
char * file_name; |
| 53 |
}; |
| 54 |
|
| 55 |
|
| 56 |
void |
| 57 |
gpgme_decrypt_get_sig_ctx (gpgme_ctx_t ctx, gpgme_sig_t * r_sig) |
| 58 |
{ |
| 59 |
if (!ctx) |
| 60 |
return; |
| 61 |
if (r_sig) |
| 62 |
*r_sig = NULL; |
| 63 |
if (ctx && ctx->result.decrypt->sig) { |
| 64 |
_gpgme_sig_ref (ctx->result.decrypt->sig); |
| 65 |
if (r_sig) |
| 66 |
*r_sig = ctx->result.decrypt->sig; |
| 67 |
} |
| 68 |
} /* gpgme_decrypt_get_sig_ctx */ |
| 69 |
|
| 70 |
|
| 71 |
void |
| 72 |
gpgme_decrypt_get_status( gpgme_ctx_t ctx, char * keyid, |
| 73 |
gpgme_op_flags_t * r_flags ) |
| 74 |
{ |
| 75 |
gpgme_op_flags_t flags = 0; |
| 76 |
_decrypt_result_t res; |
| 77 |
|
| 78 |
if( !keyid ) |
| 79 |
return; |
| 80 |
if( ctx->result_type != RESULT_TYPE_DECRYPT ) |
| 81 |
return; |
| 82 |
if( !ctx->result.decrypt->okay |
| 83 |
&& ctx->result.decrypt->no_seckey ) { |
| 84 |
strcpy( keyid, ctx->result.decrypt->keyid ); |
| 85 |
flags |= GPGME_OPFLAG_NOSECKEY; |
| 86 |
} |
| 87 |
res = ctx->result.decrypt; |
| 88 |
if (res->bad_armor) |
| 89 |
flags |= GPGME_OPFLAG_BADARMOR; |
| 90 |
if (res->bad_mdc) |
| 91 |
flags |= GPGME_OPFLAG_BADMDC; |
| 92 |
if (r_flags) |
| 93 |
*r_flags = flags; |
| 94 |
} /* gpgme_decrypt_get_status */ |
| 95 |
|
| 96 |
|
| 97 |
void |
| 98 |
_gpgme_release_decrypt_result( _decrypt_result_t res ) |
| 99 |
{ |
| 100 |
if( res ) { |
| 101 |
safe_free( res->passphrase_info ); |
| 102 |
safe_free( res->userid_hint ); |
| 103 |
gpgme_sig_release( res->sig ); |
| 104 |
safe_free( res ); |
| 105 |
} |
| 106 |
} /* _gpgme_release_decrypt_result */ |
| 107 |
|
| 108 |
|
| 109 |
static gpgme_error_t |
| 110 |
create_result_struct (gpgme_ctx_t ctx) |
| 111 |
{ |
| 112 |
assert( !ctx->result.decrypt ); |
| 113 |
ctx->result.decrypt = calloc( 1, sizeof * ctx->result.decrypt ); |
| 114 |
if( !ctx->result.decrypt ) |
| 115 |
return mk_error( Out_Of_Core ); |
| 116 |
ctx->result_type = RESULT_TYPE_DECRYPT; |
| 117 |
return 0; |
| 118 |
} /* create_result_struct */ |
| 119 |
|
| 120 |
|
| 121 |
static void |
| 122 |
list_status_handler( gpgme_ctx_t ctx, gpg_status_code_t code, char * args ) |
| 123 |
{ |
| 124 |
char keyid[32] = {0}; |
| 125 |
|
| 126 |
if (ctx->out_of_core) |
| 127 |
return; |
| 128 |
if (code == STATUS_ENC_TO) { |
| 129 |
keyid[0] = (char)atol (args+17); |
| 130 |
strncpy (keyid+1, args, 16); |
| 131 |
gpgme_recipients_add_name (ctx->enc_to, keyid); |
| 132 |
} |
| 133 |
} /* list_status_handler */ |
| 134 |
|
| 135 |
|
| 136 |
static gpgme_sig_t |
| 137 |
add_signature( gpgme_ctx_t ctx ) |
| 138 |
{ |
| 139 |
gpgme_sig_t sig, s; |
| 140 |
gpgme_error_t err; |
| 141 |
|
| 142 |
err = gpgme_sig_new( &sig ); |
| 143 |
if( err ) { |
| 144 |
ctx->out_of_core = 1; |
| 145 |
return NULL; |
| 146 |
} |
| 147 |
if( ctx->result.decrypt->file_name ) { |
| 148 |
sig->file_name = strdup( ctx->result.decrypt->file_name ); |
| 149 |
if( !sig->file_name ) { |
| 150 |
ctx->out_of_core = 1; |
| 151 |
safe_free( sig ); |
| 152 |
return NULL; |
| 153 |
} |
| 154 |
} |
| 155 |
if( !ctx->result.decrypt->sig ) |
| 156 |
ctx->result.decrypt->sig = sig; |
| 157 |
else { |
| 158 |
for( s = ctx->result.decrypt->sig; s->next; s=s->next ) |
| 159 |
; |
| 160 |
s->next = sig; |
| 161 |
} |
| 162 |
return sig; |
| 163 |
} /* add_signature */ |
| 164 |
|
| 165 |
|
| 166 |
static void |
| 167 |
decrypt_status_handler (gpgme_ctx_t ctx, gpg_status_code_t code, char *args) |
| 168 |
{ |
| 169 |
static gpgme_sig_t sig = NULL; |
| 170 |
static char keyid[16+1]; |
| 171 |
char *p = NULL, fpr[40+1]; |
| 172 |
int i = 0, j=0; |
| 173 |
char ch = 0; |
| 174 |
|
| 175 |
if (ctx->out_of_core) |
| 176 |
return; |
| 177 |
|
| 178 |
if (ctx->result_type == RESULT_TYPE_NONE) { |
| 179 |
if (create_result_struct (ctx)) { |
| 180 |
ctx->out_of_core = 1; |
| 181 |
return; |
| 182 |
} |
| 183 |
} |
| 184 |
|
| 185 |
assert (ctx->result_type == RESULT_TYPE_DECRYPT); |
| 186 |
|
| 187 |
if (code == STATUS_GOODSIG || code == STATUS_REVKEYSIG |
| 188 |
|| code == STATUS_EXPKEYSIG || code == STATUS_BADSIG |
| 189 |
|| code == STATUS_ERRSIG) { |
| 190 |
sig = add_signature (ctx); |
| 191 |
if (!sig || ctx->out_of_core) |
| 192 |
return; |
| 193 |
} |
| 194 |
|
| 195 |
_gpgme_nodata_status_handler (code, args, &ctx->result.decrypt->no_data); |
| 196 |
_gpgme_pass_status_handler (code, args, &ctx->result.decrypt->bad_passphrase, |
| 197 |
&ctx->result.decrypt->no_data, |
| 198 |
&ctx->result.decrypt->passphrase_info); |
| 199 |
if (sig && (code >= STATUS_TRUST_UNDEFINED && code <= STATUS_TRUST_ULTIMATE)) { |
| 200 |
_gpgme_sigtrust_status_handler (code, args, &sig->trust); |
| 201 |
DEBUG1("sig_trust: %d", sig->trust); |
| 202 |
} |
| 203 |
|
| 204 |
switch (code) { |
| 205 |
case STATUS_EOF: |
| 206 |
break; |
| 207 |
|
| 208 |
case STATUS_USERID_HINT: |
| 209 |
safe_free (ctx->result.decrypt->userid_hint); |
| 210 |
p = ctx->result.decrypt->userid_hint = strdup (args); |
| 211 |
if (!p) { |
| 212 |
ctx->out_of_core = 1; |
| 213 |
return; |
| 214 |
} |
| 215 |
break; |
| 216 |
|
| 217 |
case STATUS_DECRYPTION_OKAY: |
| 218 |
ctx->result.decrypt->okay = 1; |
| 219 |
break; |
| 220 |
|
| 221 |
case STATUS_DECRYPTION_FAILED: |
| 222 |
ctx->result.decrypt->failed = 1; |
| 223 |
break; |
| 224 |
|
| 225 |
case STATUS_RSA_OR_IDEA: |
| 226 |
ctx->result.decrypt->idea_cipher = 1; |
| 227 |
break; |
| 228 |
|
| 229 |
case STATUS_SIG_ID: |
| 230 |
DEBUG0 ("Plaintext was signed!\n"); |
| 231 |
break; |
| 232 |
|
| 233 |
case STATUS_NO_SECKEY: |
| 234 |
ctx->result.decrypt->no_seckey++; |
| 235 |
strncpy (ctx->result.decrypt->keyid, args, 16); |
| 236 |
break; |
| 237 |
|
| 238 |
case STATUS_NO_PUBKEY: |
| 239 |
sig->sigstat = GPGME_SIG_STAT_NOKEY; |
| 240 |
break; |
| 241 |
|
| 242 |
case STATUS_VALIDSIG: |
| 243 |
p = fpr; |
| 244 |
for( i = 0; i < DIM(fpr) && args[i] && args[i] != ' ' ; i++ ) |
| 245 |
*p++ = args[i]; |
| 246 |
*p = 0; |
| 247 |
/* skip the formatted date */ |
| 248 |
while ( args[i] && args[i] == ' ') |
| 249 |
i++; |
| 250 |
while ( args[i] && args[i] != ' ') |
| 251 |
i++; |
| 252 |
/* and get the timestamp */ |
| 253 |
sig->created = strtoul( args + i, NULL, 10 ); |
| 254 |
ctx->result.decrypt->sig_okay = 1; |
| 255 |
break; |
| 256 |
|
| 257 |
case STATUS_GOODSIG: |
| 258 |
case STATUS_BADSIG: |
| 259 |
if (code == STATUS_GOODSIG) |
| 260 |
sig->sigstat = GPGME_SIG_STAT_GOOD; |
| 261 |
else |
| 262 |
sig->sigstat = GPGME_SIG_STAT_BAD; |
| 263 |
strncpy( sig->id, args, 16 ); |
| 264 |
sig->user_id = p = calloc (1, strlen (args + 16) + 2); |
| 265 |
if (!p) |
| 266 |
{ |
| 267 |
ctx->out_of_core = 1; |
| 268 |
return; |
| 269 |
} |
| 270 |
strcpy (p, args + 16); |
| 271 |
break; |
| 272 |
|
| 273 |
case STATUS_EXPKEYSIG: |
| 274 |
case STATUS_REVKEYSIG: |
| 275 |
if( code == STATUS_EXPKEYSIG ) |
| 276 |
sig->sigstat = GPGME_SIG_STAT_E_GOOD; |
| 277 |
else if( code == STATUS_REVKEYSIG ) |
| 278 |
sig->sigstat = GPGME_SIG_STAT_R_GOOD; |
| 279 |
for( i=0, p=sig->id; args[i] && args[i] != ' '; i++ ) |
| 280 |
*p++ = args[i]; |
| 281 |
*p = '\0'; |
| 282 |
p = sig->user_id = calloc( 1, strlen( args+i ) + 2 ); |
| 283 |
if( !p ) { |
| 284 |
ctx->out_of_core = 1; |
| 285 |
return; |
| 286 |
} |
| 287 |
j=0; |
| 288 |
while (args[i]) |
| 289 |
p[j++] = args[i++]; |
| 290 |
p[j++] = '\0'; |
| 291 |
break; |
| 292 |
|
| 293 |
case STATUS_ERRSIG: |
| 294 |
sig->sigstat = GPGME_SIG_STAT_ERROR; |
| 295 |
break; |
| 296 |
|
| 297 |
case STATUS_BADMDC: |
| 298 |
ctx->result.decrypt->bad_mdc = 1; |
| 299 |
break; |
| 300 |
|
| 301 |
case STATUS_BADARMOR: |
| 302 |
ctx->result.decrypt->bad_armor = 1; |
| 303 |
break; |
| 304 |
|
| 305 |
case STATUS_FILE_START: |
| 306 |
if (*args == '3') { |
| 307 |
safe_free (ctx->result.decrypt->file_name); |
| 308 |
p = ctx->result.decrypt->file_name = strdup (args+2); |
| 309 |
if( !p ) { |
| 310 |
ctx->out_of_core = 1; |
| 311 |
return; |
| 312 |
} |
| 313 |
} |
| 314 |
ctx->result.decrypt->file_start++; |
| 315 |
if (ctx->cb.interactiv) |
| 316 |
ctx->cb.interactiv (ctx->cb.interactiv_value, code, NULL, args+2); |
| 317 |
break; |
| 318 |
|
| 319 |
case STATUS_FILE_DONE: |
| 320 |
ctx->result.decrypt->file_done++; |
| 321 |
if( ctx->cb.interactiv ) |
| 322 |
ctx->cb.interactiv( ctx->cb.interactiv_value, code, NULL, NULL ); |
| 323 |
break; |
| 324 |
|
| 325 |
case STATUS_CARDCTRL: |
| 326 |
ch = args[i++]; |
| 327 |
if (ch == '4') { |
| 328 |
ctx->result.decrypt->no_seckey = -1; |
| 329 |
break; |
| 330 |
} |
| 331 |
if (ch != '3') |
| 332 |
break; |
| 333 |
i++; |
| 334 |
p = ctx->result.decrypt->cardno; |
| 335 |
for (; i-1 < DIM (ctx->result.decrypt->cardno) && args[i]; i++) |
| 336 |
*p++ = args[i]; |
| 337 |
*p = 0; |
| 338 |
break; |
| 339 |
|
| 340 |
default: |
| 341 |
break; /* ignore all other codes */ |
| 342 |
} |
| 343 |
} /* decrypt_status_handler */ |
| 344 |
|
| 345 |
|
| 346 |
static const char * |
| 347 |
decrypt_command_handler (void * opaque, gpg_status_code_t code, const char * key) |
| 348 |
{ |
| 349 |
gpgme_ctx_t c = opaque; |
| 350 |
|
| 351 |
if (!code) { |
| 352 |
/* We have been called for cleanup */ |
| 353 |
if (c->cb.passphrase) { |
| 354 |
c->cb.passphrase (c->cb.passphrase_value, NULL, |
| 355 |
&c->result.decrypt->last_pw_handle); |
| 356 |
} |
| 357 |
return NULL; |
| 358 |
} |
| 359 |
|
| 360 |
if (!key || !c->cb.passphrase) |
| 361 |
return NULL; |
| 362 |
|
| 363 |
if (c->result_type == RESULT_TYPE_NONE) { |
| 364 |
if (create_result_struct (c)) { |
| 365 |
c->out_of_core = 1; |
| 366 |
return NULL; |
| 367 |
} |
| 368 |
} |
| 369 |
|
| 370 |
if( code == STATUS_GET_HIDDEN |
| 371 |
&& (!strcmp( key, "passphrase.enter" ) |
| 372 |
|| !strcmp( key, "passphrase.pin.ask" )) ) { |
| 373 |
const char * userid_hint = c->result.decrypt->userid_hint; |
| 374 |
const char * passphrase_info = c->result.decrypt->passphrase_info; |
| 375 |
const char * cardno = c->result.decrypt->cardno; |
| 376 |
int bad_passphrase = c->result.decrypt->bad_passphrase; |
| 377 |
int is_card=0; |
| 378 |
char * buf; |
| 379 |
const char *s; |
| 380 |
|
| 381 |
c->result.decrypt->bad_passphrase = 0; |
| 382 |
is_card = !strcmp (key, "passphrase.pin.ask"); |
| 383 |
if (!userid_hint) |
| 384 |
userid_hint = "[User ID hint missing]"; |
| 385 |
if (!passphrase_info) |
| 386 |
passphrase_info = "[passphrase info missing]"; |
| 387 |
buf = malloc (20 + strlen (userid_hint) |
| 388 |
+ strlen (passphrase_info) + 3); |
| 389 |
if( !buf ) { |
| 390 |
c->out_of_core = 1; |
| 391 |
return NULL; |
| 392 |
} |
| 393 |
sprintf (buf, "%s\n%s\n%s", bad_passphrase? "TRY_AGAIN":"ENTER_PASSPHRASE", |
| 394 |
userid_hint, passphrase_info); |
| 395 |
s = c->cb.passphrase (c->cb.passphrase_value, is_card? cardno : buf, |
| 396 |
&c->result.decrypt->last_pw_handle); |
| 397 |
safe_free (buf); |
| 398 |
return s; |
| 399 |
} |
| 400 |
else if( (code == STATUS_GET_BOOL |
| 401 |
&& !strcmp( key, "openfile.overwrite.okay" )) |
| 402 |
|| (code == STATUS_GET_LINE && !strcmp( key, "openfile.askoutname" )) ) |
| 403 |
if (c->cb.interactiv) |
| 404 |
return c->cb.interactiv( c->cb.interactiv_value, code, key, NULL ); |
| 405 |
|
| 406 |
return NULL; |
| 407 |
} /* decrypt_command_handler */ |
| 408 |
|
| 409 |
|
| 410 |
static gpgme_error_t |
| 411 |
list_keys_start( gpgme_ctx_t ctx, gpgme_data_t ciph, const char * file, |
| 412 |
gpgme_recipients_t * r_keys ) |
| 413 |
{ |
| 414 |
gpgme_error_t rc; |
| 415 |
gpgme_recipients_t keys; |
| 416 |
FILE * fp; |
| 417 |
const char * s; |
| 418 |
char * p; |
| 419 |
|
| 420 |
if (!r_keys) |
| 421 |
return mk_error (Invalid_Value); |
| 422 |
if (ciph && file || !ciph && !file) |
| 423 |
return mk_error (Invalid_Mode); |
| 424 |
|
| 425 |
*r_keys = NULL; |
| 426 |
fail_on_pending_request( ctx ); |
| 427 |
ctx->pending = 1; |
| 428 |
|
| 429 |
_gpgme_gpg_release( &ctx->gpg ); |
| 430 |
rc = _gpgme_gpg_new( &ctx->gpg ); |
| 431 |
if( rc ) |
| 432 |
return rc; |
| 433 |
|
| 434 |
if( ciph ) { |
| 435 |
p = _gpgme_data_get_as_string( ciph ); |
| 436 |
if( !p ) |
| 437 |
return mk_error( Out_Of_Core ); |
| 438 |
|
| 439 |
s = _gpgme_get_tmpfile( 0 ); |
| 440 |
fp = fopen( s, "wb" ); |
| 441 |
if( !fp ) { |
| 442 |
safe_free( p ); |
| 443 |
return mk_error( File_Error ); |
| 444 |
} |
| 445 |
fwrite (p, 1, strlen (p), fp); |
| 446 |
fclose (fp); |
| 447 |
safe_free (p); |
| 448 |
} |
| 449 |
else |
| 450 |
s = file; |
| 451 |
|
| 452 |
rc = gpgme_recipients_new( &keys ); |
| 453 |
if( rc ) |
| 454 |
return rc; |
| 455 |
ctx->enc_to = keys; |
| 456 |
|
| 457 |
_gpgme_gpg_set_status_handler( ctx->gpg, list_status_handler, ctx ); |
| 458 |
_gpgme_gpg_add_arg( ctx->gpg, "--list-only" ); |
| 459 |
_gpgme_gpg_add_arg( ctx->gpg, s ); |
| 460 |
|
| 461 |
rc = _gpgme_gpg_spawn( ctx->gpg, ctx ); |
| 462 |
if( rc ) { |
| 463 |
ctx->pending = 0; |
| 464 |
_gpgme_gpg_release( &ctx->gpg ); |
| 465 |
gpgme_recipients_release( keys ); keys = NULL; |
| 466 |
} |
| 467 |
*r_keys = keys; |
| 468 |
return rc; |
| 469 |
} /* list_keys_start */ |
| 470 |
|
| 471 |
|
| 472 |
/* It either works with a file or a data object but not with both! */ |
| 473 |
gpgme_error_t |
| 474 |
gpgme_op_list_keys( gpgme_data_t ciph, const char * file, |
| 475 |
gpgme_recipients_t * r_rset ) |
| 476 |
{ |
| 477 |
gpgme_ctx_t ctx = NULL; |
| 478 |
gpgme_error_t err; |
| 479 |
|
| 480 |
if( !r_rset ) |
| 481 |
return mk_error (Invalid_Value); |
| 482 |
*r_rset = NULL; |
| 483 |
err = gpgme_new( &ctx ); |
| 484 |
if( !err ) |
| 485 |
err = list_keys_start( ctx, ciph, file, r_rset ); |
| 486 |
if( !err ) { |
| 487 |
gpgme_wait( ctx, 1 ); |
| 488 |
ctx->pending = 0; |
| 489 |
} |
| 490 |
gpgme_release( ctx ); |
| 491 |
return err; |
| 492 |
} /* gpgme_op_list_keys */ |
| 493 |
|
| 494 |
|
| 495 |
static gpgme_error_t |
| 496 |
file_decrypt_start( gpgme_ctx_t ctx, const char ** input, size_t nfiles, |
| 497 |
const char * output ) |
| 498 |
{ |
| 499 |
gpgme_error_t rc; |
| 500 |
|
| 501 |
if( !input ) |
| 502 |
return mk_error( Invalid_Value ); |
| 503 |
|
| 504 |
fail_on_pending_request( ctx ); |
| 505 |
ctx->pending = 1; |
| 506 |
|
| 507 |
_gpgme_gpg_release( &ctx->gpg ); |
| 508 |
rc = _gpgme_gpg_new( &ctx->gpg ); |
| 509 |
if( rc ) |
| 510 |
return rc; |
| 511 |
|
| 512 |
_gpgme_gpg_set_status_handler( ctx->gpg, decrypt_status_handler, ctx ); |
| 513 |
if( !ctx->use_pass_fd ) |
| 514 |
_gpgme_gpg_set_command_handler( ctx->gpg, decrypt_command_handler, ctx ); |
| 515 |
else { |
| 516 |
rc = _gpgme_add_passphrase( ctx ); |
| 517 |
if( rc ) { |
| 518 |
_gpgme_gpg_release( &ctx->gpg ); |
| 519 |
return rc; |
| 520 |
} |
| 521 |
} |
| 522 |
|
| 523 |
if( !ctx->cb.interactiv ) |
| 524 |
_gpgme_gpg_add_arg( ctx->gpg, "--yes" ); |
| 525 |
if( nfiles > 1 || !output ) |
| 526 |
_gpgme_gpg_add_arg( ctx->gpg, "--no-mangle-dos-filenames" ); |
| 527 |
if( ctx->pipemode || nfiles > 1 ) |
| 528 |
_gpgme_gpg_add_arg( ctx->gpg, "--decrypt-files" ); |
| 529 |
else |
| 530 |
_gpgme_gpg_add_arg( ctx->gpg, "--decrypt" ); |
| 531 |
|
| 532 |
/* cannot use --output with --decrypt-files */ |
| 533 |
if( nfiles == 1 && !ctx->pipemode && output ) { |
| 534 |
_gpgme_gpg_add_arg( ctx->gpg, "--output" ); |
| 535 |
_gpgme_gpg_add_arg( ctx->gpg, output ); |
| 536 |
} |
| 537 |
|
| 538 |
while( nfiles-- ) |
| 539 |
_gpgme_gpg_add_arg( ctx->gpg, *input++ ); |
| 540 |
|
| 541 |
rc = _gpgme_gpg_spawn( ctx->gpg, ctx ); |
| 542 |
if( rc ) { |
| 543 |
ctx->pending = 0; |
| 544 |
_gpgme_gpg_release( &ctx->gpg ); |
| 545 |
} |
| 546 |
|
| 547 |
return rc; |
| 548 |
} /* file_decrypt_start */ |
| 549 |
|
| 550 |
|
| 551 |
static gpgme_error_t |
| 552 |
decrypt_start( gpgme_ctx_t ctx, gpgme_data_t ciph, gpgme_data_t plain ) |
| 553 |
{ |
| 554 |
int rc = 0; |
| 555 |
|
| 556 |
fail_on_pending_request( ctx ); |
| 557 |
ctx->pending = 1; |
| 558 |
|
| 559 |
_gpgme_release_result( ctx ); |
| 560 |
ctx->out_of_core = 0; |
| 561 |
|
| 562 |
/* create a process object */ |
| 563 |
_gpgme_gpg_release( &ctx->gpg ); |
| 564 |
rc = _gpgme_gpg_new( &ctx->gpg ); |
| 565 |
if( rc ) |
| 566 |
goto leave; |
| 567 |
|
| 568 |
_gpgme_gpg_set_status_handler( ctx->gpg, decrypt_status_handler, ctx ); |
| 569 |
if( ctx->use_logging ) |
| 570 |
_gpgme_gpg_set_logging_handler( ctx->gpg, ctx ); |
| 571 |
if( ctx->cb.passphrase ) { |
| 572 |
rc = _gpgme_gpg_set_command_handler( ctx->gpg, decrypt_command_handler, ctx ); |
| 573 |
if ( rc ) |
| 574 |
goto leave; |
| 575 |
} |
| 576 |
else if( ctx->passphrase_value ) { |
| 577 |
rc = _gpgme_add_passphrase( ctx ); |
| 578 |
if( rc ) |
| 579 |
goto leave; |
| 580 |
} |
| 581 |
|
| 582 |
/* build the commandline */ |
| 583 |
_gpgme_gpg_add_arg( ctx->gpg, "--decrypt" ); |
| 584 |
/* Check the supplied data */ |
| 585 |
if( !ciph || gpgme_data_get_type( ciph ) == GPGME_DATA_TYPE_NONE ) { |
| 586 |
rc = mk_error( No_Data ); |
| 587 |
goto leave; |
| 588 |
} |
| 589 |
_gpgme_data_set_mode( ciph, GPGME_DATA_MODE_OUT ); |
| 590 |
if( gpgme_data_get_type( plain ) != GPGME_DATA_TYPE_NONE ) { |
| 591 |
rc = mk_error( Invalid_Value ); |
| 592 |
goto leave; |
| 593 |
} |
| 594 |
_gpgme_data_set_mode( plain, GPGME_DATA_MODE_IN ); |
| 595 |
|
| 596 |
/* Tell the gpg object about the data */ |
| 597 |
_gpgme_gpg_add_arg ( ctx->gpg, "--output" ); |
| 598 |
_gpgme_gpg_add_arg ( ctx->gpg, "-" ); |
| 599 |
_gpgme_gpg_add_data( ctx->gpg, plain, 1 ); |
| 600 |
_gpgme_gpg_add_data( ctx->gpg, ciph, 0 ); |
| 601 |
|
| 602 |
/* and kick off the process */ |
| 603 |
rc = _gpgme_gpg_spawn( ctx->gpg, ctx ); |
| 604 |
|
| 605 |
leave: |
| 606 |
if( rc ) { |
| 607 |
ctx->pending = 0; |
| 608 |
_gpgme_gpg_release( &ctx->gpg ); |
| 609 |
} |
| 610 |
return rc; |
| 611 |
} /* decrypt_start */ |
| 612 |
|
| 613 |
|
| 614 |
static gpgme_error_t |
| 615 |
get_decrypt_result( gpgme_ctx_t ctx ) |
| 616 |
{ |
| 617 |
gpgme_error_t err; |
| 618 |
struct decrypt_result_s * res; |
| 619 |
|
| 620 |
assert( ctx->result.decrypt ); |
| 621 |
res = ctx->result.decrypt; |
| 622 |
if( ctx->result_type != RESULT_TYPE_DECRYPT ) |
| 623 |
err = mk_error( General_Error ); |
| 624 |
else if (res->okay || res->sig_okay) |
| 625 |
err = 0; |
| 626 |
else if( ctx->out_of_core ) |
| 627 |
err = mk_error( Out_Of_Core ); |
| 628 |
else if( res->no_passphrase ) |
| 629 |
err = mk_error( No_Passphrase ); |
| 630 |
else if( res->bad_passphrase ) |
| 631 |
err = mk_error( Bad_Passphrase ); |
| 632 |
else if( res->no_seckey) |
| 633 |
err = mk_error( No_Seckey ); |
| 634 |
else if( res->idea_cipher ) |
| 635 |
err = mk_error( Cipher_IDEA ); |
| 636 |
else if( res->failed || (res->file_start != res->file_done) ) |
| 637 |
err = mk_error( Decryption_Failed ); |
| 638 |
else if( !res->okay || !res->no_data ) |
| 639 |
err = mk_error( No_Data ); |
| 640 |
else if( gpgme_get_process_rc( ctx ) ) |
| 641 |
err = mk_error( Internal_GPG_Problem ); |
| 642 |
return err; |
| 643 |
} /* get_decrypt_result */ |
| 644 |
|
| 645 |
|
| 646 |
/** |
| 647 |
* gpgme_op_decrypt: |
| 648 |
* @c: The context |
| 649 |
* @ciph: ciphertext input |
| 650 |
* @plain: plaintext output |
| 651 |
* |
| 652 |
* This function decrypts @in to @out. |
| 653 |
* Other parameters are take from the context @c. |
| 654 |
* The function does wait for the result. |
| 655 |
* |
| 656 |
* Return value: 0 on success or an errorcode. |
| 657 |
**/ |
| 658 |
gpgme_error_t |
| 659 |
gpgme_op_decrypt( gpgme_ctx_t ctx, gpgme_data_t ciph, gpgme_data_t plain ) |
| 660 |
|
| 661 |
{ |
| 662 |
gpgme_error_t err; |
| 663 |
|
| 664 |
err = decrypt_start( ctx, ciph, plain ); |
| 665 |
if( !err ) { |
| 666 |
gpgme_wait( ctx, 1 ); |
| 667 |
ctx->pending = 0; |
| 668 |
err = get_decrypt_result( ctx ); |
| 669 |
} |
| 670 |
return err; |
| 671 |
} /* gpgme_op_decrypt */ |
| 672 |
|
| 673 |
|
| 674 |
gpgme_error_t |
| 675 |
gpgme_op_file_decrypt( gpgme_ctx_t ctx, const char * ciph, const char * plain ) |
| 676 |
{ |
| 677 |
gpgme_error_t err; |
| 678 |
const char * files[1]; |
| 679 |
|
| 680 |
files[0] = ciph; |
| 681 |
|
| 682 |
err = file_decrypt_start( ctx, files, 1, plain ); |
| 683 |
if( !err ) { |
| 684 |
gpgme_wait( ctx, 1 ); |
| 685 |
err = get_decrypt_result( ctx ); |
| 686 |
ctx->pending = 0; |
| 687 |
} |
| 688 |
return err; |
| 689 |
} /* gpgme_op_file_decrypt */ |
| 690 |
|
| 691 |
|
| 692 |
gpgme_error_t |
| 693 |
gpgme_op_files_decrypt( gpgme_ctx_t ctx, const char ** files, size_t nfiles ) |
| 694 |
{ |
| 695 |
gpgme_error_t err; |
| 696 |
|
| 697 |
err = file_decrypt_start( ctx, files, nfiles, NULL ); |
| 698 |
if( !err ) { |
| 699 |
gpgme_wait( ctx, 1 ); |
| 700 |
err = get_decrypt_result( ctx ); |
| 701 |
ctx->pending = 0; |
| 702 |
} |
| 703 |
return err; |
| 704 |
} |
| 705 |
|
| 706 |
|
| 707 |
gpgme_error_t |
| 708 |
gpgme_op_clip_decrypt( gpgme_ctx_t ctx ) |
| 709 |
{ |
| 710 |
gpgme_error_t err; |
| 711 |
gpgme_data_t ciph = NULL; |
| 712 |
gpgme_data_t plain = NULL; |
| 713 |
|
| 714 |
err = gpgme_data_new_from_clipboard (&ciph); |
| 715 |
if( !err ) |
| 716 |
err = gpgme_data_new( &plain ); |
| 717 |
if( !err ) |
| 718 |
err = gpgme_op_decrypt( ctx, ciph, plain ); |
| 719 |
|
| 720 |
gpgme_data_release_and_set_clipboard( plain ); |
| 721 |
gpgme_data_release( ciph ); |
| 722 |
|
| 723 |
return err; |
| 724 |
} /* gpgme_op_clip_decrypt */ |
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