tfcrypt.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
   6  *
   7  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  24  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "tfcrypt.h"
  30
  31 static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
  32 {
  33         if (chr == '\x03') {
  34                 getps->retn = ((size_t)-2);
  35                 return 6;
  36         }
  37         return 1;
  38 }
  39
  40 static int getps_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  41 {
  42         if (chr == '\x03') {
  43                 getps->retn = ((size_t)-2);
  44                 return 6;
  45         }
  46         if (chr >= '0' && chr <= '9') return 1;
  47         if (chr >= 'a' && chr <= 'f') return 1;
  48         if (chr >= 'A' && chr <= 'F') return 1;
  49         if (chr == '\x7f' || chr == '\x08'
  50         || chr == '\x15' || chr == '\x17') return 1;
  51         return 0;
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56         int c;
  57         double td;
  58         char *s, *d, *t, *stoi;
  59         size_t x, n;
  60
  61         progname = basename(argv[0]);
  62
  63         if (!isatty(2)) do_statline_dynamic = NO;
  64
  65         opterr = 0;
  66         while ((c = getopt(argc, argv, "s:aU:C:r:K:t:TPkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
  67                 switch (c) {
  68                         case 's':
  69                                 saltf = optarg;
  70                                 break;
  71                         case 'r':
  72                                 randsource = optarg;
  73                                 break;
  74                         case 'c':
  75                                 if (!strcasecmp(optarg, "show"))
  76                                         counter_opt = TFC_CTR_SHOW;
  77                                 else if (!strcasecmp(optarg, "head"))
  78                                         counter_opt = TFC_CTR_HEAD;
  79                                 else if (!strcasecmp(optarg, "rand"))
  80                                         counter_opt = TFC_CTR_RAND;
  81                                 else counter_file = sksum_hashlist_file = optarg;
  82                                 break;
  83                         case 'C':
  84                                 if (!strcasecmp(optarg, "ctr"))
  85                                         ctr_mode = TFC_MODE_CTR;
  86                                 else if (!strcasecmp(optarg, "stream"))
  87                                         ctr_mode = TFC_MODE_STREAM;
  88                                 else if (!strcasecmp(optarg, "cbc"))
  89                                         ctr_mode = TFC_MODE_CBC;
  90                                 else if (!strcasecmp(optarg, "ecb"))
  91                                         ctr_mode = TFC_MODE_ECB;
  92                                 else if (!strcasecmp(optarg, "xts"))
  93                                         ctr_mode = TFC_MODE_XTS;
  94                                 else if (!strcasecmp(optarg, "ocb"))
  95                                         ctr_mode = TFC_MODE_OCB;
  96                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
  97                                 break;
  98                         case 'P':
  99                                 do_edcrypt = TFC_DO_PLAIN;
 100                                 password = YES;
 101                                 ctr_mode = TFC_MODE_PLAIN;
 102                                 break;
 103                         case 'e':
 104                                 do_edcrypt = TFC_DO_ENCRYPT;
 105                                 break;
 106                         case 'd':
 107                                 do_edcrypt = TFC_DO_DECRYPT;
 108                                 break;
 109                         case 'D':
 110                                 macbits = strtoul(optarg, &stoi, 10);
 111                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 112                                 || macbits > TF_MAX_BITS || macbits % 8)
 113                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 114                                 break;
 115                         case 'n':
 116                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 117                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 118                                 break;
 119                         case 'U':
 120                                 if (!strcasecmp(optarg, "key"))
 121                                         mackey_opt = TFC_MACKEY_RAWKEY;
 122                                 else if (!strcasecmp(optarg, "pwd"))
 123                                         mackey_opt = TFC_MACKEY_PASSWORD;
 124                                 else {
 125                                         mackey_opt = TFC_MACKEY_FILE;
 126                                         mackeyf = optarg;
 127                                 }
 128                                 break;
 129                         case 'p':
 130                                 password = YES;
 131                                 break;
 132                         case 'k':
 133                                 rawkey = TFC_RAWKEY_KEYFILE;
 134                                 break;
 135                         case 'z':
 136                                 rawkey = TFC_RAWKEY_ASKSTR;
 137                                 break;
 138                         case 'x':
 139                                 rawkey = TFC_RAWKEY_ASKHEX;
 140                                 break;
 141                         case 'K':
 142                                 verbose = YES;
 143                                 genkeyf = optarg;
 144                                 break;
 145                         case 't':
 146                                 tweakf = optarg;
 147                                 break;
 148                         case 'T':
 149                                 tfc_saltsz = 0;
 150                                 do_tfcrypt1 = YES;
 151                                 break;
 152                         case 'l':
 153                                 if (maxlen != NOFSIZE) break;
 154
 155                                 maxlen = tfc_humanfsize(optarg, &stoi);
 156                                 if (!str_empty(stoi)) {
 157                                         maxlen = tfc_fnamesize(optarg, YES);
 158                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 159                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 160                                         "%s: invalid count value", optarg);
 161                                 }
 162                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 163                                 if (counter_opt == TFC_CTR_HEAD)
 164                                         maxlen += TF_BLOCK_SIZE;
 165                                 break;
 166                         case 'w':
 167                                 overwrite_source = YES;
 168                                 break;
 169                         case 'E':
 170                                 if (!strcmp(optarg, "xall")) {
 171                                         catch_all_errors = YES;
 172                                         break;
 173                                 }
 174                                 if (!strcmp(optarg, "exit"))
 175                                         error_action = TFC_ERRACT_EXIT;
 176                                 else if (!strncmp(optarg, "cont", 4))
 177                                         error_action = TFC_ERRACT_CONT;
 178                                 else if (!strcmp(optarg, "sync"))
 179                                         error_action = TFC_ERRACT_SYNC;
 180                                 else if (!strcmp(optarg, "lsync"))
 181                                         error_action = TFC_ERRACT_LSYNC;
 182                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 183                                 break;
 184                         case 'O':
 185                                 s = d = optarg; t = NULL;
 186                                 while ((s = strtok_r(d, ",", &t))) {
 187                                         if (d) d = NULL;
 188                                         if (!strcmp(s, "sync"))
 189                                                 write_flags |= O_SYNC;
 190                                         else if (!strcmp(s, "trunc"))
 191                                                 write_flags |= O_TRUNC;
 192                                         else if (!strcmp(s, "fsync"))
 193                                                 do_fsync = YES;
 194                                         else if (!strcmp(s, "pad"))
 195                                                 do_pad = YES;
 196                                         else if (!strcmp(s, "xtime"))
 197                                                 do_preserve_time = YES;
 198                                         else if (!strcmp(s, "gibsize"))
 199                                                 do_stats_in_gibs = YES;
 200                                         else if (!strcmp(s, "plainstats"))
 201                                                 do_statline_dynamic = NO;
 202                                         else if (!strcmp(s, "statless"))
 203                                                 do_less_stats = YES;
 204                                         else if (!strcmp(s, "norepeat"))
 205                                                 no_repeat = YES;
 206                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 207                                                 pw_prompt = s+7;
 208                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 209                                                 mac_pw_prompt = s+10;
 210                                         else if (!strcmp(s, "shorthex"))
 211                                                 do_full_hexdump = NO;
 212                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 213                                                 s += 5;
 214                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 215                                                 if (!str_empty(stoi)) {
 216                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 217                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 218                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 219                                                         "%s: invalid block size value", s);
 220                                                 }
 221                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 222                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 223                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 224                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 225                                                         "%s: block size exceeds %u bytes",
 226                                                         s, TFC_U(TFC_BLKSIZE));
 227                                         }
 228                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 229                                                 s += 10;
 230                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 231                                                 if (!str_empty(stoi)) {
 232                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 233                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 234                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 235                                                         "%s: invalid blocks per xts block value", s);
 236                                                 }
 237                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 238                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 239                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 240                                                         s, TFC_U(TFC_BLKSIZE));
 241                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 242                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 243                                                         s, TFC_U(TFC_BLKSIZE));
 244                                         }
 245                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 246                                                 s += 6;
 247                                                 iseek = tfc_humanfsize(s, &stoi);
 248                                                 if (!str_empty(stoi)) {
 249                                                         iseek = tfc_fnamesize(s, YES);
 250                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 251                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 252                                                         "%s: invalid iseek value", s);
 253                                                 }
 254                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 255                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 256                                                         xerror(NO, YES, YES,
 257                                                                 "%s: not round to TF block size "
 258                                                                 "of %u bytes",
 259                                                                 s, TFC_U(TF_BLOCK_SIZE));
 260                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 261                                         }
 262                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 263                                                 s += 7;
 264                                                 iseek = tfc_humanfsize(s, &stoi);
 265                                                 if (!str_empty(stoi)) {
 266                                                         iseek = tfc_fnamesize(s, YES);
 267                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 268                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 269                                                                 "%s: invalid ixseek value", s);
 270                                                 }
 271                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 272                                         }
 273                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 274                                                 s += 5;
 275                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 276                                                 if (!str_empty(stoi)) {
 277                                                         iseek_blocks = tfc_fnamesize(s, YES);
 278                                                         if (iseek_blocks == NOFSIZE)
 279                                                                 xerror(NO, YES, YES,
 280                                                                 "%s: invalid ictr value", s);
 281                                                         iseek_blocks /= TF_BLOCK_SIZE;
 282                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 283                                                 }
 284                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 285                                         }
 286                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 287                                                 s += 6;
 288                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 289                                                 if (!str_empty(stoi)) {
 290                                                         iseek_blocks = tfc_fnamesize(s, YES);
 291                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 292                                                         if (iseek_blocks == NOFSIZE)
 293                                                                 xerror(NO, YES, YES,
 294                                                                 "%s: invalid ixctr value", s);
 295                                                 }
 296                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 297                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 298                                                         xerror(NO, YES, YES,
 299                                                         "%s: not round to TF block size "
 300                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 301                                                 iseek_blocks /= TF_BLOCK_SIZE;
 302                                         }
 303                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 304                                                 s += 6;
 305                                                 oseek = tfc_humanfsize(s, &stoi);
 306                                                 if (!str_empty(stoi)) {
 307                                                         oseek = tfc_fnamesize(s, YES);
 308                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 309                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 310                                                         "%s: invalid oseek value", s);
 311                                                 }
 312                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 313                                         }
 314                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 315                                                 s += 6;
 316                                                 maxlen = tfc_humanfsize(s, &stoi);
 317                                                 if (!str_empty(stoi)) {
 318                                                         maxlen = tfc_fnamesize(s, YES);
 319                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 320                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 321                                                         "%s: invalid count value", s);
 322                                                 }
 323                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 324                                                 if (counter_opt == TFC_CTR_HEAD)
 325                                                         maxlen += TF_BLOCK_SIZE;
 326                                         }
 327                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 328                                                 s += 5;
 329                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 330                                                 if (!str_empty(stoi)) {
 331                                                         maxkeylen = (size_t)tfc_fnamesize(s, YES);
 332                                                         maxkeylen = (size_t)tfc_modifysize((tfc_fsize)maxkeylen, strchr(s, ':'));
 333                                                         if (maxkeylen == NOSIZE)
 334                                                                 xerror(NO, YES, YES,
 335                                                                 "%s: invalid key length value", s);
 336                                                 }
 337                                                 else maxkeylen = (size_t)tfc_modifysize((tfc_fsize)maxkeylen, strchr(s, ':'));
 338                                         }
 339                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 340                                                 s += 5;
 341                                                 ctrsz = tfc_humanfsize(s, &stoi);
 342                                                 if (!str_empty(stoi)) {
 343                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 344                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 345                                                         if (ctrsz == NOSIZE)
 346                                                                 xerror(NO, YES, YES,
 347                                                                 "%s: invalid counter length value", s);
 348                                                 }
 349                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 350                                                 if (ctrsz > TF_BLOCK_SIZE)
 351                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 352                                         }
 353                                         else xerror(NO, YES, YES, "invalid option %s", s);
 354                                 }
 355                                 break;
 356                         case 'S':
 357                                 do_mac = TFC_MAC_SIGN;
 358                                 if (strcasecmp(optarg, "mac") != 0)
 359                                         do_mac_file = optarg;
 360                                 break;
 361                         case 'M':
 362                                 do_mac = TFC_MAC_VRFY;
 363                                 if (!strcasecmp(optarg, "drop"))
 364                                         do_mac = TFC_MAC_DROP;
 365                                 else if (strcasecmp(optarg, "mac") != 0)
 366                                         do_mac_file = optarg;
 367                                 break;
 368                         case 'm':
 369                                 if (do_mac != TFC_MAC_VRFY)
 370                                         xerror(NO, YES, YES, "signature source was not specified");
 371                                 do_mac = TFC_MAC_JUST_VRFY;
 372                                 break;
 373                         case 'R':
 374                         case 'Z':
 375                                 if (maxlen != NOFSIZE) {
 376                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 377                                         else genrandom_nr_bytes = maxlen;
 378                                 }
 379                                 else {
 380                                         tfc_fsize t;
 381                                         if (!strcasecmp(optarg, "cbs"))
 382                                                 t = TF_BLOCK_SIZE;
 383                                         else if (!strcasecmp(optarg, "ks"))
 384                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 385                                         else if (!strcasecmp(optarg, "xks"))
 386                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 387                                         else if (!strcasecmp(optarg, "iobs"))
 388                                                 t = blksize;
 389                                         else {
 390                                                 t = tfc_humanfsize(optarg, &stoi);
 391                                                 if (!str_empty(stoi)) {
 392                                                         t = tfc_fnamesize(optarg, NO);
 393                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 394                                                 }
 395                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 396                                         }
 397                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 398                                         else genrandom_nr_bytes = maxlen = t;
 399                                 }
 400                                 break;
 401                         case 'a':
 402                                 do_preserve_time = YES;
 403                                 break;
 404                         case 'A':
 405                                 do_outfmt = TFC_OUTFMT_B64;
 406                                 break;
 407                         case 'W':
 408                                 do_outfmt = TFC_OUTFMT_RAW;
 409                                 break;
 410                         case 'H':
 411                                 do_outfmt = TFC_OUTFMT_HEX;
 412                                 break;
 413                         case 'q':
 414                                 quiet = YES;
 415                                 verbose = NO;
 416                                 status_timer = 0;
 417                                 break;
 418                         case 'v':
 419                                 verbose = YES;
 420                                 break;
 421                         case 'V':
 422                                 td = strtod(optarg, &stoi);
 423                                 status_timer = TFC_DTOUSECS(td);
 424                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 425                                 break;
 426                         default:
 427                                 usage();
 428                                 break;
 429                 }
 430         }
 431
 432         if (!strcmp(progname, "tfbench")) {
 433                 if (!*(argv+optind)) usage();
 434
 435                 td = strtod(*(argv+optind), &stoi);
 436                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 437                         xerror(NO, YES, YES,
 438                         "%s: invalid benchmark time in seconds", *(argv+optind));
 439                 bench_timer = TFC_DTOUSECS(td);
 440                 do_benchmark(bench_timer, td);
 441         }
 442         if (genrandom_nr_bytes) {
 443                 ctr_mode = TFC_MODE_STREAM;
 444                 do_edcrypt = TFC_DO_ENCRYPT;
 445                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 446         }
 447         if (genzero_nr_bytes) {
 448                 ctr_mode = TFC_MODE_PLAIN;
 449                 do_edcrypt = TFC_DO_PLAIN;
 450                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 451         }
 452
 453         if (rawkey && password)
 454                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 455         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 456                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 457         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 458                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 459         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 460                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 461         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 462                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 463         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 464                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 465         if (tweakf && do_tfcrypt1 == NO)
 466                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 467         if (ctr_mode == TFC_MODE_PLAIN
 468         && (do_edcrypt || do_mac || rawkey
 469         || mackey_opt || counter_opt || counter_file))
 470                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 471
 472         errno = 0;
 473         do_stop = NO;
 474
 475         if (saltf) {
 476                 int saltfd;
 477
 478                 memset(tfc_salt, 0, TFC_MAX_SALT);
 479                 tfc_saltsz = 0;
 480                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 481
 482                 if (!strcmp(saltf, "-")) saltfd = 0;
 483                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 484                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 485                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 486                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 487                 tfc_saltsz = lio;
 488                 xclose(saltfd);
 489         }
 490
 491 _nosalt:
 492         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 493                 int mkfd = -1;
 494                 tfc_yesno do_stop;
 495
 496                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 497                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 498                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 499
 500                 skein_init(&sk, TFC_KEY_BITS);
 501
 502                 do_stop = NO;
 503                 while (1) {
 504                         if (do_stop) break;
 505                         pblk = tmpdata;
 506                         ldone = 0;
 507                         lrem = lblock = sizeof(tmpdata);
 508                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 509 _mkragain:              lio = xread(mkfd, pblk, lrem);
 510                         if (lio == 0) do_stop = YES;
 511                         if (lio != NOSIZE) ldone += lio;
 512                         else {
 513                                 if (errno != EIO && catch_all_errors != YES)
 514                                         xerror(NO, NO, NO, "%s", mackeyf);
 515                                 switch (error_action) {
 516                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 517                                         case TFC_ERRACT_SYNC:
 518                                         case TFC_ERRACT_LSYNC:
 519                                                 xerror(YES, NO, NO, "%s", mackeyf);
 520                                                 lio = ldone = lrem = lblock;
 521                                                 memset(tmpdata, 0, lio);
 522                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 523                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 524                                                 break;
 525                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 526                                 }
 527                         }
 528                         if (lio && lio < lrem) {
 529                                 pblk += lio;
 530                                 lrem -= lio;
 531                                 goto _mkragain;
 532                         }
 533
 534                         skein_update(&sk, tmpdata, ldone);
 535                 }
 536
 537                 skein_final(mackey, &sk);
 538
 539                 xclose(mkfd);
 540         }
 541         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 542                 memset(&getps, 0, sizeof(struct getpasswd_state));
 543                 getps.fd = getps.efd = -1;
 544                 getps.passwd = pwdask;
 545                 getps.pwlen = sizeof(pwdask)-1;
 546                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 547                 getps.charfilter = getps_filter;
 548                 getps.maskchar = 'x';
 549                 getps.flags = GETP_WAITFILL;
 550                 n = xgetpasswd(&getps);
 551                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 552                 if (n == ((size_t)-2)) xexit(1);
 553                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 554                 if (verbose) {
 555                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 556                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 557                         tfc_nfsay(stderr, "MAC password hint: ");
 558                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 559                         memset(tmpdata, 0, sizeof(tmpdata));
 560                 }
 561         }
 562
 563
 564         if ((strlen(progname) <= 9)
 565         && ((!strcmp(progname, "sksum"))
 566         || ((!memcmp(progname, "sk", 2))
 567         && (!memcmp(progname+3, "sum", 3)
 568         || !memcmp(progname+4, "sum", 3)
 569         || !memcmp(progname+5, "sum", 3)
 570         || !memcmp(progname+6, "sum", 3)))))
 571                 do_sksum(progname, argv+optind);
 572         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 573
 574         idx = optind;
 575
 576         if (argv[idx]) {
 577                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 578                 if (!strcmp(argv[idx], "-")) kfd = 0;
 579                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 580                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 581
 582                 lio = strnlen(argv[idx], PATH_MAX);
 583                 memset(argv[idx], '*', lio);
 584
 585                 idx++;
 586         }
 587         else password = YES;
 588
 589         errno = 0;
 590         if (do_tfcrypt1 == YES && tweakf) {
 591                 int twfd;
 592
 593                 if (!strcmp(tweakf, "-")) twfd = 0;
 594                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 595                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 596                 lio = ldone = xread(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 597                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 598                 if (ldone < 2*TF_SIZE_UNIT)
 599                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 600                 xclose(twfd);
 601         }
 602
 603 _nokeyfd:
 604         errno = 0;
 605         if (argv[idx]) {
 606                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 607                 else {
 608                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 609                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 610                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 611                 }
 612                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 613
 614                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 615                         if (verbose) tfc_esay("%s: disabling signature verification on "
 616                                 "requested partial decryption.", progname);
 617                         do_mac = NO;
 618                 }
 619
 620                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 621                         maxlen = tfc_fdsize(sfd);
 622                         if (maxlen == NOFSIZE)
 623                                 xerror(NO, YES, YES,
 624                                 "Cannot verify embedded MAC with non-seekable source!");
 625                         maxlen -= TF_FROM_BITS(macbits);
 626                 }
 627                 srcfname = argv[idx];
 628                 idx++;
 629         }
 630
 631         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 632                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 633
 634         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 635         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 636
 637         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 638         errno = 0;
 639         if (counter_file) {
 640                 int ctrfd;
 641
 642                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 643                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 644                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 645                 lio = xread(ctrfd, ctr, ctrsz);
 646                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 647                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 648                 xclose(ctrfd);
 649         }
 650         else if (counter_opt == TFC_CTR_HEAD) {
 651                 pblk = ctr;
 652                 ldone = 0;
 653                 lrem = lblock = ctrsz;
 654                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 655 _ctrragain:     lio = xread(sfd, pblk, lrem);
 656                 if (lio != NOSIZE) ldone += lio;
 657                 else {
 658                         if (errno != EIO && catch_all_errors != YES)
 659                                 xerror(NO, NO, NO, "%s", srcfname);
 660                         switch (error_action) {
 661                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 662                                 case TFC_ERRACT_SYNC:
 663                                 case TFC_ERRACT_LSYNC:
 664                                         xerror(YES, NO, NO, "%s", srcfname);
 665                                         lio = ldone = lrem = lblock;
 666                                         memset(ctr, 0, lio);
 667                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 668                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 669                                         break;
 670                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 671                         }
 672                 }
 673                 if (lio && lio < lrem) {
 674                         pblk += lio;
 675                         lrem -= lio;
 676                         goto _ctrragain;
 677                 }
 678                 total_processed_src += ldone;
 679         }
 680
 681 _ctrskip1:
 682         if (iseek) {
 683                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 684                         iseek += ctrsz;
 685                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 686                         xerror(YES, NO, NO, "%s: seek failed", srcfname);
 687         }
 688
 689         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 690
 691         if (verbose) tfc_esay("%s: hashing password", progname);
 692
 693         if (rawkey == TFC_RAWKEY_KEYFILE) {
 694                 tfc_yesno xtskeyset = NO;
 695
 696                 pblk = key;
 697 _xts2key:       ldone = 0;
 698                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 699                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 700 _keyragain:     lio = xread(kfd, pblk, lrem);
 701                 if (lio != NOSIZE) ldone += lio;
 702                 else {
 703                         if (errno != EIO && catch_all_errors != YES)
 704                                 xerror(NO, NO, NO, "reading key");
 705                         switch (error_action) {
 706                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 707                                 case TFC_ERRACT_SYNC:
 708                                 case TFC_ERRACT_LSYNC:
 709                                         xerror(YES, NO, NO, "reading key");
 710                                         lio = ldone = lrem = lblock;
 711                                         memset(key, 0, lio);
 712                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 713                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 714                                         break;
 715                                 default: xerror(NO, NO, NO, "reading key"); break;
 716                         }
 717                 }
 718                 if (lio && lio < lrem) {
 719                         pblk += lio;
 720                         lrem -= lio;
 721                         goto _keyragain;
 722                 }
 723                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 724
 725                 if (ctr_mode == TFC_MODE_XTS) {
 726                         if (xtskeyset == NO) {
 727                                 pblk = xtskey;
 728                                 xtskeyset = YES;
 729                                 goto _xts2key;
 730                         }
 731                 }
 732         }
 733         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 734                 tfc_yesno xtskeyset = NO;
 735
 736                 pblk = key; n = sizeof(key);
 737 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 738                 getps.fd = getps.efd = -1;
 739                 getps.passwd = (char *)pblk;
 740                 getps.pwlen = n;
 741                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 742                 getps.charfilter = getps_filter;
 743                 getps.maskchar = 'x';
 744                 getps.flags = GETP_WAITFILL;
 745                 n = xgetpasswd(&getps);
 746                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 747                 if (n == ((size_t)-2)) xexit(1);
 748                 if (ctr_mode == TFC_MODE_XTS) {
 749                         if (xtskeyset == NO) {
 750                                 pblk = xtskey; n = sizeof(xtskey);
 751                                 xtskeyset = YES;
 752                                 goto _xts2keyaskstr;
 753                         }
 754                 }
 755         }
 756         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 757                 tfc_yesno xtskeyset = NO;
 758
 759                 pblk = key;
 760 _rawkey_hex_again:
 761                 memset(&getps, 0, sizeof(struct getpasswd_state));
 762                 getps.fd = getps.efd = -1;
 763                 getps.passwd = pwdask;
 764                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 765                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 766                 getps.charfilter = getps_hex_filter;
 767                 getps.maskchar = 'x';
 768                 getps.flags = GETP_WAITFILL;
 769                 n = xgetpasswd(&getps);
 770                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 771                 if (n == ((size_t)-2)) xexit(1);
 772                 if (n % 2) {
 773                         tfc_esay("Please input even number of hex digits!");
 774                         goto _rawkey_hex_again;
 775                 }
 776                 hex2bin(pblk, pwdask);
 777                 memset(pwdask, 0, sizeof(pwdask));
 778                 if (ctr_mode == TFC_MODE_XTS) {
 779                         if (xtskeyset == NO) {
 780                                 pblk = xtskey;
 781                                 xtskeyset = YES;
 782                                 goto _rawkey_hex_again;
 783                         }
 784                 }
 785         }
 786         else if (password) {
 787 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 788                 getps.fd = getps.efd = -1;
 789                 getps.passwd = pwdask;
 790                 getps.pwlen = sizeof(pwdask)-1;
 791                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 792                 getps.charfilter = getps_filter;
 793                 getps.maskchar = 'x';
 794                 getps.flags = GETP_WAITFILL;
 795                 n = xgetpasswd(&getps);
 796                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 797                 if (n == ((size_t)-2)) xexit(1);
 798                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 799                         getps.fd = getps.efd = -1;
 800                         getps.passwd = pwdagain;
 801                         getps.pwlen = sizeof(pwdagain)-1;
 802                         getps.echo = "Enter it again: ";
 803                         getps.flags = GETP_WAITFILL;
 804                         n = xgetpasswd(&getps);
 805                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 806                         if (n == ((size_t)-2)) xexit(1);
 807                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 808                                 tfc_esay("Passwords are different, try again");
 809                                 goto _pwdagain;
 810                         }
 811                 }
 812                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 813                 memset(pwdask, 0, sizeof(pwdask));
 814                 memset(pwdagain, 0, sizeof(pwdagain));
 815         }
 816         else {
 817                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, maxkeylen) != YES)
 818                         xerror(NO, NO, YES, "hashing key");
 819         }
 820
 821         if (rawkey == NO) {
 822                 if (tfc_saltsz > 0) {
 823                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 824                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 825                 }
 826                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 827                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 828                 memset(tfc_salt, 0, TFC_MAX_SALT);
 829         }
 830
 831         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 832                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 833         }
 834
 835         if (genkeyf) {
 836                 int krfd;
 837                 tfc_yesno xtskeyset = NO;
 838
 839                 pblk = key;
 840                 if (!strcmp(genkeyf, "-")) krfd = 1;
 841                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 842                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 843 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 844                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 845                 if (verbose && xtskeyset == NO) {
 846                         tfc_esay("%s: password hashing done", progname);
 847                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 848                         tfc_esay("%s: Have a nice day!", progname);
 849                 }
 850
 851                 if (ctr_mode == TFC_MODE_XTS) {
 852                         if (xtskeyset == NO) {
 853                                 pblk = xtskey;
 854                                 xtskeyset = YES;
 855                                 goto _xts2genkey;
 856                         }
 857                 }
 858
 859                 fchmod(krfd, 0600);
 860                 xclose(krfd);
 861                 xexit(0);
 862         }
 863
 864         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 865                 if (verbose) tfc_esay("%s: disabling signature verification on "
 866                         "requested partial decryption.", progname);
 867                 do_mac = NO;
 868         }
 869
 870         if (do_mac != NO) {
 871                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 872                 if (ctr_mode < TFC_MODE_OCB) {
 873                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 874                                 "will be slower.", progname);
 875                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 876                         else skein_init(&sk, macbits);
 877                 }
 878         }
 879
 880         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 881                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 882         }
 883
 884         tf_convkey(key);
 885         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 886         if (do_tfcrypt1 == YES) {
 887                 if (!tweakf) skein(key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_UNIT_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 888                 tf_key_tweak_compat(key);
 889         }
 890         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 891         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 892         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 893         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 894
 895         switch (counter_opt) {
 896                 case TFC_CTR_SHOW:
 897                         switch (do_outfmt) {
 898                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 899                                 case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
 900                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 901                         }
 902                         break;
 903                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 904         }
 905
 906 _ctrskip2:
 907         if (kfd != -1) {
 908                 xclose(kfd);
 909                 kfd = -1;
 910         }
 911         if (verbose) tfc_esay("%s: password hashing done", progname);
 912
 913         if (overwrite_source && srcfname) argv[idx] = srcfname;
 914
 915 _plain:
 916         if (argv[idx]) {
 917                 if (!strcmp(argv[idx], "-")) dfd = 1;
 918                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 919                 if (dfd == -1) {
 920                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 921                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 922                 }
 923                 dstfname = argv[idx];
 924                 idx++;
 925         }
 926
 927         if (oseek) {
 928                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 929                         xerror(YES, NO, NO, "%s: seek failed", dstfname);
 930         }
 931
 932         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 933         memset(&sigact, 0, sizeof(sigact));
 934         sigact.sa_flags = SA_RESTART;
 935         sigact.sa_handler = print_crypt_status;
 936         sigaction(SIGUSR1, &sigact, NULL);
 937         sigaction(SIGTSTP, &sigact, NULL);
 938         sigaction(SIGALRM, &sigact, NULL);
 939         if (status_timer) setup_next_alarm(status_timer);
 940         sigact.sa_handler = change_status_width;
 941         sigaction(SIGQUIT, &sigact, NULL);
 942         sigact.sa_handler = change_status_timer;
 943         sigaction(SIGUSR2, &sigact, NULL);
 944         if (quiet == NO) {
 945                 sigact.sa_handler = print_crypt_status;
 946                 sigaction(SIGINT, &sigact, NULL);
 947                 sigaction(SIGTERM, &sigact, NULL);
 948         }
 949         else {
 950                 sigact.sa_handler = exit_sigterm;
 951                 sigaction(SIGINT, &sigact, NULL);
 952                 sigaction(SIGTERM, &sigact, NULL);
 953         }
 954         memset(&sigact, 0, sizeof(struct sigaction));
 955
 956         tfc_getcurtime(&delta_time);
 957
 958         errno = 0;
 959         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 960                 pblk = ctr;
 961                 lio = lrem = ctrsz;
 962                 ldone = 0;
 963 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
 964                 if (lio != NOSIZE) ldone += lio;
 965                 else xerror(NO, NO, NO, "%s", dstfname);
 966                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 967                 if (lio < lrem) {
 968                         pblk += lio;
 969                         lrem -= lio;
 970                         goto _ctrwagain;
 971                 }
 972                 total_processed_dst += ldone;
 973                 delta_processed += ldone;
 974         }
 975
 976         errno = 0;
 977         do_stop = NO;
 978         while (1) {
 979                 if (do_stop) break;
 980                 pblk = srcblk;
 981                 ldone = 0;
 982                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
 983                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 984 _ragain:        lio = xread(sfd, pblk, lrem);
 985                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
 986                 if (lio != NOSIZE) ldone += lio;
 987                 else {
 988                         if (errno != EIO && catch_all_errors != YES)
 989                                 xerror(NO, NO, NO, "%s", srcfname);
 990                         switch (error_action) {
 991                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
 992                                 case TFC_ERRACT_SYNC:
 993                                 case TFC_ERRACT_LSYNC:
 994                                         xerror(YES, NO, NO, "%s", srcfname);
 995                                         lio = ldone = lrem = lblock;
 996                                         memset(srcblk, 0, lio);
 997                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 998                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 999                                         break;
1000                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1001                         }
1002                 }
1003                 if (lio && lio < lrem) {
1004                         pblk += lio;
1005                         lrem -= lio;
1006                         goto _ragain;
1007                 }
1008                 total_processed_src += ldone;
1009
1010                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1011                         size_t orig = ldone;
1012                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1013                         if (ldone > blksize) ldone = blksize;
1014                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1015                 }
1016
1017                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1018                         skein_update(&sk, srcblk, ldone);
1019
1020                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1021                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1022                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1023                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1024                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1025                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1026                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1027                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1028                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1029                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1030                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1031                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1032                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1033                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1034
1035                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1036                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1037                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1038                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1039
1040                 else if (ctr_mode == TFC_MODE_PLAIN)
1041                         memcpy(dstblk, srcblk, ldone);
1042
1043                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1044                         skein_update(&sk, dstblk, ldone);
1045                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1046
1047                 pblk = dstblk;
1048                 lrem = ldone;
1049                 ldone = 0;
1050 _wagain:        lio = xwrite(dfd, pblk, lrem);
1051                 if (lio != NOSIZE) ldone += lio;
1052                 else xerror(NO, NO, NO, "%s", dstfname);
1053                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1054                 if (lio < lrem) {
1055                         pblk += lio;
1056                         lrem -= lio;
1057                         goto _wagain;
1058                 }
1059 _nowrite:       total_processed_dst += ldone;
1060                 delta_processed += ldone;
1061
1062                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1063         }
1064
1065         if (do_stop == TFC_STOP_FULL) goto _nomac;
1066
1067         errno = 0;
1068         if (do_mac >= TFC_MAC_VRFY) {
1069                 if (!do_mac_file) {
1070                         pblk = macvrfy;
1071                         ldone = 0;
1072                         lrem = lblock = TF_FROM_BITS(macbits);
1073                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1074 _macragain:             lio = xread(sfd, pblk, lrem);
1075                         if (lio != NOSIZE) ldone += lio;
1076                         else {
1077                                 if (errno != EIO && catch_all_errors != YES)
1078                                         xerror(NO, NO, NO, "%s", srcfname);
1079                                 switch (error_action) {
1080                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1081                                         case TFC_ERRACT_SYNC:
1082                                         case TFC_ERRACT_LSYNC:
1083                                                 xerror(YES, NO, NO, "%s", srcfname);
1084                                                 lio = ldone = lrem = lblock;
1085                                                 memset(macvrfy, 0, lio);
1086                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1087                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1088                                                 break;
1089                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1090                                 }
1091                         }
1092                         if (lio && lio < lrem) {
1093                                 pblk += lio;
1094                                 lrem -= lio;
1095                                 goto _macragain;
1096                         }
1097                         total_processed_src += ldone;
1098                 }
1099                 else {
1100                         int mfd;
1101
1102                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1103                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1104                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1105                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1106                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1107                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1108                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1109                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1110                                 lio = TF_FROM_BITS(macbits);
1111                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1112                         }
1113                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1114                         xclose(mfd);
1115                 }
1116
1117                 if (ldone < TF_FROM_BITS(macbits)) {
1118                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1119                                 "not verifying", progname, ldone);
1120                         exitcode = 1;
1121                         goto _shortmac;
1122                 }
1123
1124                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1125                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1126
1127                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1128                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1129                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1130                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1131                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1132                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1133
1134                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1135                         if (quiet == NO) {
1136                                 tfc_esay("%s: signature is good", progname);
1137                                 if (verbose) {
1138                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1139                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1140                                 }
1141                         }
1142                 }
1143                 else {
1144                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1145                                 "wrong password, key, mode, or file is not signed", progname);
1146                         exitcode = 1;
1147                 }
1148
1149 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1150                 memset(macresult, 0, sizeof(macresult));
1151                 memset(tmpdata, 0, sizeof(tmpdata));
1152         }
1153
1154         else if (do_mac == TFC_MAC_SIGN) {
1155                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1156                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1157
1158                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1159                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1160                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1161                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1162                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1163                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1164                 memset(macresult, 0, sizeof(macresult));
1165
1166                 if (!do_mac_file) {
1167                         pblk = tmpdata;
1168                         lio = lrem = TF_FROM_BITS(macbits);
1169                         ldone = 0;
1170 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1171                         if (lio != NOSIZE) ldone += lio;
1172                         else xerror(NO, NO, NO, "%s", dstfname);
1173                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1174                         if (lio < lrem) {
1175                                 pblk += lio;
1176                                 lrem -= lio;
1177                                 goto _macwagain;
1178                         }
1179                         total_processed_dst += ldone;
1180                         delta_processed += ldone;
1181                 }
1182                 else {
1183                         int mfd;
1184
1185                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1186                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1187                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1188                         if (do_outfmt == TFC_OUTFMT_B64) {
1189                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1190                                 memset(tmpdata, 0, TFC_TMPSIZE);
1191                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1192                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1193                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1194                                 if (lrem) {
1195                                         tmpdata[lrem] = '\n';
1196                                         lrem++;
1197                                 }
1198                                 lio = xwrite(mfd, tmpdata, lrem);
1199                         }
1200                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1201                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1202                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1203                         xclose(mfd);
1204                 }
1205
1206                 memset(macvrfy, 0, sizeof(macvrfy));
1207                 memset(macresult, 0, sizeof(macresult));
1208                 memset(tmpdata, 0, sizeof(tmpdata));
1209         }
1210
1211 _nomac:
1212         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1213
1214         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1215         xclose(sfd);
1216         xclose(dfd);
1217
1218         xexit(exitcode);
1219         return -1;
1220 }