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         s = (char *)srcblk;
  66         d = getenv("HOME");
  67         if (!d) d = "";
  68         xstrlcat(s, d, PATH_MAX > sizeof(srcblk) ? sizeof(srcblk) : PATH_MAX);
  69         xstrlcat(s, "/.tfcrypt.defs", PATH_MAX > sizeof(srcblk) ? sizeof(srcblk) : PATH_MAX);
  70         read_defaults(s, YES);
  71         memset(s, 0, PATH_MAX > sizeof(srcblk) ? sizeof(srcblk) : PATH_MAX);
  72
  73         opterr = 0;
  74         while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:TPkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
  75                 switch (c) {
  76                         case 'L':
  77                                 read_defaults(optarg, NO);
  78                                 break;
  79                         case 's':
  80                                 saltf = optarg;
  81                                 break;
  82                         case 'r':
  83                                 randsource = optarg;
  84                                 break;
  85                         case 'c':
  86                                 if (!strcasecmp(optarg, "show"))
  87                                         counter_opt = TFC_CTR_SHOW;
  88                                 else if (!strcasecmp(optarg, "head"))
  89                                         counter_opt = TFC_CTR_HEAD;
  90                                 else if (!strcasecmp(optarg, "rand"))
  91                                         counter_opt = TFC_CTR_RAND;
  92                                 else counter_file = sksum_hashlist_file = optarg;
  93                                 break;
  94                         case 'C':
  95                                 if (!strcasecmp(optarg, "ctr"))
  96                                         ctr_mode = TFC_MODE_CTR;
  97                                 else if (!strcasecmp(optarg, "stream"))
  98                                         ctr_mode = TFC_MODE_STREAM;
  99                                 else if (!strcasecmp(optarg, "cbc"))
 100                                         ctr_mode = TFC_MODE_CBC;
 101                                 else if (!strcasecmp(optarg, "ecb"))
 102                                         ctr_mode = TFC_MODE_ECB;
 103                                 else if (!strcasecmp(optarg, "xts"))
 104                                         ctr_mode = TFC_MODE_XTS;
 105                                 else if (!strcasecmp(optarg, "ocb"))
 106                                         ctr_mode = TFC_MODE_OCB;
 107                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
 108                                 break;
 109                         case 'P':
 110                                 do_edcrypt = TFC_DO_PLAIN;
 111                                 password = YES;
 112                                 ctr_mode = TFC_MODE_PLAIN;
 113                                 break;
 114                         case 'e':
 115                                 do_edcrypt = TFC_DO_ENCRYPT;
 116                                 break;
 117                         case 'd':
 118                                 do_edcrypt = TFC_DO_DECRYPT;
 119                                 break;
 120                         case 'D':
 121                                 macbits = strtoul(optarg, &stoi, 10);
 122                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 123                                 || macbits > TF_MAX_BITS || macbits % 8)
 124                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 125                                 break;
 126                         case 'n':
 127                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 128                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 129                                 break;
 130                         case 'U':
 131                                 if (!strcasecmp(optarg, "key"))
 132                                         mackey_opt = TFC_MACKEY_RAWKEY;
 133                                 else if (!strcasecmp(optarg, "pwd"))
 134                                         mackey_opt = TFC_MACKEY_PASSWORD;
 135                                 else {
 136                                         mackey_opt = TFC_MACKEY_FILE;
 137                                         mackeyf = optarg;
 138                                 }
 139                                 break;
 140                         case 'p':
 141                                 password = YES;
 142                                 break;
 143                         case 'k':
 144                                 rawkey = TFC_RAWKEY_KEYFILE;
 145                                 break;
 146                         case 'z':
 147                                 rawkey = TFC_RAWKEY_ASKSTR;
 148                                 break;
 149                         case 'x':
 150                                 rawkey = TFC_RAWKEY_ASKHEX;
 151                                 break;
 152                         case 'K':
 153                                 verbose = YES;
 154                                 genkeyf = optarg;
 155                                 break;
 156                         case 't':
 157                                 tweakf = optarg;
 158                                 break;
 159                         case 'T':
 160                                 tfc_saltsz = 0;
 161                                 do_tfcrypt1 = YES;
 162                                 break;
 163                         case 'l':
 164                                 if (maxlen != NOFSIZE) break;
 165
 166                                 maxlen = tfc_humanfsize(optarg, &stoi);
 167                                 if (!str_empty(stoi)) {
 168                                         maxlen = tfc_fnamesize(optarg, YES);
 169                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 170                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 171                                         "%s: invalid count value", optarg);
 172                                 }
 173                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 174                                 if (counter_opt == TFC_CTR_HEAD)
 175                                         maxlen += TF_BLOCK_SIZE;
 176                                 break;
 177                         case 'w':
 178                                 overwrite_source = YES;
 179                                 break;
 180                         case 'E':
 181                                 if (!strcmp(optarg, "xall")) {
 182                                         catch_all_errors = YES;
 183                                         break;
 184                                 }
 185                                 if (!strcmp(optarg, "xseek")) {
 186                                         ignore_seek_errors = YES;
 187                                         break;
 188                                 }
 189                                 if (!strcmp(optarg, "exit"))
 190                                         error_action = TFC_ERRACT_EXIT;
 191                                 else if (!strncmp(optarg, "cont", 4))
 192                                         error_action = TFC_ERRACT_CONT;
 193                                 else if (!strcmp(optarg, "sync"))
 194                                         error_action = TFC_ERRACT_SYNC;
 195                                 else if (!strcmp(optarg, "lsync"))
 196                                         error_action = TFC_ERRACT_LSYNC;
 197                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 198                                 break;
 199                         case 'O':
 200                                 s = d = optarg; t = NULL;
 201                                 while ((s = strtok_r(d, ",", &t))) {
 202                                         if (d) d = NULL;
 203                                         if (!strcmp(s, "sync"))
 204                                                 write_flags |= O_SYNC;
 205                                         else if (!strcmp(s, "trunc"))
 206                                                 write_flags |= O_TRUNC;
 207                                         else if (!strcmp(s, "fsync"))
 208                                                 do_fsync = YES;
 209                                         else if (!strcmp(s, "pad"))
 210                                                 do_pad = YES;
 211                                         else if (!strcmp(s, "xtime"))
 212                                                 do_preserve_time = YES;
 213                                         else if (!strcmp(s, "gibsize"))
 214                                                 do_stats_in_gibs = YES;
 215                                         else if (!strcmp(s, "plainstats"))
 216                                                 do_statline_dynamic = NO;
 217                                         else if (!strcmp(s, "statless"))
 218                                                 do_less_stats = YES;
 219                                         else if (!strcmp(s, "norepeat"))
 220                                                 no_repeat = YES;
 221                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 222                                                 pw_prompt = s+7;
 223                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 224                                                 mac_pw_prompt = s+10;
 225                                         else if (!strcmp(s, "shorthex"))
 226                                                 do_full_hexdump = NO;
 227                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 228                                                 s += 5;
 229                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 230                                                 if (!str_empty(stoi)) {
 231                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 232                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 233                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 234                                                         "%s: invalid block size value", s);
 235                                                 }
 236                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 237                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 238                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 239                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 240                                                         "%s: block size exceeds %u bytes",
 241                                                         s, TFC_U(TFC_BLKSIZE));
 242                                         }
 243                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 244                                                 s += 10;
 245                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 246                                                 if (!str_empty(stoi)) {
 247                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 248                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 249                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 250                                                         "%s: invalid blocks per xts block value", s);
 251                                                 }
 252                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 253                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 254                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 255                                                         s, TFC_U(TFC_BLKSIZE));
 256                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 257                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 258                                                         s, TFC_U(TFC_BLKSIZE));
 259                                         }
 260                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 261                                                 s += 6;
 262                                                 iseek = tfc_humanfsize(s, &stoi);
 263                                                 if (!str_empty(stoi)) {
 264                                                         iseek = tfc_fnamesize(s, YES);
 265                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 266                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 267                                                         "%s: invalid iseek value", s);
 268                                                 }
 269                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 270                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 271                                                         xerror(NO, YES, YES,
 272                                                                 "%s: not round to TF block size "
 273                                                                 "of %u bytes",
 274                                                                 s, TFC_U(TF_BLOCK_SIZE));
 275                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 276                                         }
 277                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 278                                                 s += 7;
 279                                                 iseek = tfc_humanfsize(s, &stoi);
 280                                                 if (!str_empty(stoi)) {
 281                                                         iseek = tfc_fnamesize(s, YES);
 282                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 283                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 284                                                                 "%s: invalid ixseek value", s);
 285                                                 }
 286                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 287                                         }
 288                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 289                                                 s += 5;
 290                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 291                                                 if (!str_empty(stoi)) {
 292                                                         iseek_blocks = tfc_fnamesize(s, YES);
 293                                                         if (iseek_blocks == NOFSIZE)
 294                                                                 xerror(NO, YES, YES,
 295                                                                 "%s: invalid ictr value", s);
 296                                                         iseek_blocks /= TF_BLOCK_SIZE;
 297                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 298                                                 }
 299                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 300                                         }
 301                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 302                                                 s += 6;
 303                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 304                                                 if (!str_empty(stoi)) {
 305                                                         iseek_blocks = tfc_fnamesize(s, YES);
 306                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 307                                                         if (iseek_blocks == NOFSIZE)
 308                                                                 xerror(NO, YES, YES,
 309                                                                 "%s: invalid ixctr value", s);
 310                                                 }
 311                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 312                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 313                                                         xerror(NO, YES, YES,
 314                                                         "%s: not round to TF block size "
 315                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 316                                                 iseek_blocks /= TF_BLOCK_SIZE;
 317                                         }
 318                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 319                                                 s += 6;
 320                                                 oseek = tfc_humanfsize(s, &stoi);
 321                                                 if (!str_empty(stoi)) {
 322                                                         oseek = tfc_fnamesize(s, YES);
 323                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 324                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 325                                                         "%s: invalid oseek value", s);
 326                                                 }
 327                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 328                                         }
 329                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 330                                                 s += 6;
 331                                                 maxlen = tfc_humanfsize(s, &stoi);
 332                                                 if (!str_empty(stoi)) {
 333                                                         maxlen = tfc_fnamesize(s, YES);
 334                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 335                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 336                                                         "%s: invalid count value", s);
 337                                                 }
 338                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 339                                                 if (counter_opt == TFC_CTR_HEAD)
 340                                                         maxlen += TF_BLOCK_SIZE;
 341                                         }
 342                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 343                                                 s += 5;
 344                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 345                                                 if (!str_empty(stoi)) {
 346                                                         maxkeylen = tfc_fnamesize(s, YES);
 347                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 348                                                         if (maxkeylen == NOSIZE)
 349                                                                 xerror(NO, YES, YES,
 350                                                                 "%s: invalid key length value", s);
 351                                                 }
 352                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 353                                         }
 354                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 355                                                 s += 5;
 356                                                 keyoffset = tfc_humanfsize(s, &stoi);
 357                                                 if (!str_empty(stoi)) {
 358                                                         keyoffset = tfc_fnamesize(s, YES);
 359                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 360                                                         if (keyoffset == NOFSIZE)
 361                                                                 xerror(NO, YES, YES,
 362                                                                 "%s: invalid key offset value", s);
 363                                                 }
 364                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 365                                         }
 366                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 367                                                 s += 5;
 368                                                 ctrsz = tfc_humanfsize(s, &stoi);
 369                                                 if (!str_empty(stoi)) {
 370                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 371                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 372                                                         if (ctrsz == NOSIZE)
 373                                                                 xerror(NO, YES, YES,
 374                                                                 "%s: invalid counter length value", s);
 375                                                 }
 376                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 377                                                 if (ctrsz > TF_BLOCK_SIZE)
 378                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 379                                         }
 380                                         else xerror(NO, YES, YES, "invalid option %s", s);
 381                                 }
 382                                 break;
 383                         case 'S':
 384                                 do_mac = TFC_MAC_SIGN;
 385                                 if (strcasecmp(optarg, "mac") != 0)
 386                                         do_mac_file = optarg;
 387                                 break;
 388                         case 'M':
 389                                 do_mac = TFC_MAC_VRFY;
 390                                 if (!strcasecmp(optarg, "drop"))
 391                                         do_mac = TFC_MAC_DROP;
 392                                 else if (strcasecmp(optarg, "mac") != 0)
 393                                         do_mac_file = optarg;
 394                                 break;
 395                         case 'm':
 396                                 if (do_mac != TFC_MAC_VRFY)
 397                                         xerror(NO, YES, YES, "signature source was not specified");
 398                                 do_mac = TFC_MAC_JUST_VRFY;
 399                                 break;
 400                         case 'R':
 401                         case 'Z':
 402                                 if (maxlen != NOFSIZE) {
 403                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 404                                         else genrandom_nr_bytes = maxlen;
 405                                 }
 406                                 else {
 407                                         tfc_fsize t;
 408                                         if (!strcasecmp(optarg, "cbs"))
 409                                                 t = TF_BLOCK_SIZE;
 410                                         else if (!strcasecmp(optarg, "ks"))
 411                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 412                                         else if (!strcasecmp(optarg, "xks"))
 413                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 414                                         else if (!strcasecmp(optarg, "iobs"))
 415                                                 t = blksize;
 416                                         else {
 417                                                 t = tfc_humanfsize(optarg, &stoi);
 418                                                 if (!str_empty(stoi)) {
 419                                                         t = tfc_fnamesize(optarg, NO);
 420                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 421                                                 }
 422                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 423                                         }
 424                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 425                                         else genrandom_nr_bytes = maxlen = t;
 426                                 }
 427                                 break;
 428                         case 'a':
 429                                 do_preserve_time = YES;
 430                                 break;
 431                         case 'A':
 432                                 do_outfmt = TFC_OUTFMT_B64;
 433                                 break;
 434                         case 'W':
 435                                 do_outfmt = TFC_OUTFMT_RAW;
 436                                 break;
 437                         case 'H':
 438                                 do_outfmt = TFC_OUTFMT_HEX;
 439                                 break;
 440                         case 'q':
 441                                 quiet = YES;
 442                                 verbose = NO;
 443                                 status_timer = 0;
 444                                 break;
 445                         case 'v':
 446                                 verbose = YES;
 447                                 break;
 448                         case 'V':
 449                                 td = strtod(optarg, &stoi);
 450                                 status_timer = TFC_DTOUSECS(td);
 451                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 452                                 break;
 453                         default:
 454                                 usage();
 455                                 break;
 456                 }
 457         }
 458
 459         if (!strcmp(progname, "tfbench")) {
 460                 if (!*(argv+optind)) usage();
 461
 462                 td = strtod(*(argv+optind), &stoi);
 463                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 464                         xerror(NO, YES, YES,
 465                         "%s: invalid benchmark time in seconds", *(argv+optind));
 466                 bench_timer = TFC_DTOUSECS(td);
 467                 do_benchmark(bench_timer, td);
 468         }
 469         if (genrandom_nr_bytes) {
 470                 ctr_mode = TFC_MODE_STREAM;
 471                 do_edcrypt = TFC_DO_ENCRYPT;
 472                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 473         }
 474         if (genzero_nr_bytes) {
 475                 ctr_mode = TFC_MODE_PLAIN;
 476                 do_edcrypt = TFC_DO_PLAIN;
 477                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 478         }
 479
 480         if (rawkey && password)
 481                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 482         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 483                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 484         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 485                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 486         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 487                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 488         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 489                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 490         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 491                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 492         if (tweakf && do_tfcrypt1 == NO)
 493                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 494         if (ctr_mode == TFC_MODE_PLAIN
 495         && (do_edcrypt || do_mac || rawkey
 496         || mackey_opt || counter_opt || counter_file))
 497                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 498
 499         errno = 0;
 500         do_stop = NO;
 501
 502         if (saltf) {
 503                 int saltfd;
 504
 505                 memset(tfc_salt, 0, TFC_MAX_SALT);
 506                 tfc_saltsz = 0;
 507                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 508
 509                 if (!strcmp(saltf, "-")) saltfd = 0;
 510                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 511                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 512                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 513                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 514                 tfc_saltsz = lio;
 515                 xclose(saltfd);
 516         }
 517
 518 _nosalt:
 519         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 520                 int mkfd = -1;
 521                 tfc_yesno do_stop;
 522
 523                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 524                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 525                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 526
 527                 skein_init(&sk, TFC_KEY_BITS);
 528
 529                 do_stop = NO;
 530                 while (1) {
 531                         if (do_stop) break;
 532                         pblk = tmpdata;
 533                         ldone = 0;
 534                         lrem = lblock = sizeof(tmpdata);
 535                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 536 _mkragain:              lio = xread(mkfd, pblk, lrem);
 537                         if (lio == 0) do_stop = YES;
 538                         if (lio != NOSIZE) ldone += lio;
 539                         else {
 540                                 if (errno != EIO && catch_all_errors != YES)
 541                                         xerror(NO, NO, NO, "%s", mackeyf);
 542                                 switch (error_action) {
 543                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 544                                         case TFC_ERRACT_SYNC:
 545                                         case TFC_ERRACT_LSYNC:
 546                                                 xerror(YES, NO, NO, "%s", mackeyf);
 547                                                 lio = ldone = lrem = lblock;
 548                                                 memset(tmpdata, 0, lio);
 549                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 550                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 551                                                 break;
 552                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 553                                 }
 554                         }
 555                         if (lio && lio < lrem) {
 556                                 pblk += lio;
 557                                 lrem -= lio;
 558                                 goto _mkragain;
 559                         }
 560
 561                         skein_update(&sk, tmpdata, ldone);
 562                 }
 563
 564                 skein_final(mackey, &sk);
 565
 566                 xclose(mkfd);
 567         }
 568         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 569                 memset(&getps, 0, sizeof(struct getpasswd_state));
 570                 getps.fd = getps.efd = -1;
 571                 getps.passwd = pwdask;
 572                 getps.pwlen = sizeof(pwdask)-1;
 573                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 574                 getps.charfilter = getps_filter;
 575                 getps.maskchar = 'x';
 576                 getps.flags = GETP_WAITFILL;
 577                 n = xgetpasswd(&getps);
 578                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 579                 if (n == ((size_t)-2)) xexit(1);
 580                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 581                 if (verbose) {
 582                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 583                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 584                         tfc_nfsay(stderr, "MAC password hint: ");
 585                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 586                         memset(tmpdata, 0, sizeof(tmpdata));
 587                 }
 588         }
 589
 590
 591         if ((strlen(progname) <= 9)
 592         && ((!strcmp(progname, "sksum"))
 593         || ((!memcmp(progname, "sk", 2))
 594         && (!memcmp(progname+3, "sum", 3)
 595         || !memcmp(progname+4, "sum", 3)
 596         || !memcmp(progname+5, "sum", 3)
 597         || !memcmp(progname+6, "sum", 3)))))
 598                 do_sksum(progname, argv+optind);
 599         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 600
 601         idx = optind;
 602
 603         if (argv[idx]) {
 604                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 605                 if (!strcmp(argv[idx], "-")) kfd = 0;
 606                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 607                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 608
 609                 lio = strnlen(argv[idx], PATH_MAX);
 610                 memset(argv[idx], '*', lio);
 611
 612                 idx++;
 613         }
 614         else password = YES;
 615
 616         errno = 0;
 617         if (do_tfcrypt1 == YES && tweakf) {
 618                 int twfd;
 619
 620                 if (!strcmp(tweakf, "-")) twfd = 0;
 621                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 622                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 623                 lio = ldone = xread(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 624                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 625                 if (ldone < 2*TF_SIZE_UNIT)
 626                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 627                 xclose(twfd);
 628         }
 629
 630 _nokeyfd:
 631         errno = 0;
 632         if (argv[idx]) {
 633                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 634                 else {
 635                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 636                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 637                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 638                 }
 639                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 640
 641                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 642                         if (verbose) tfc_esay("%s: disabling signature verification on "
 643                                 "requested partial decryption.", progname);
 644                         do_mac = NO;
 645                 }
 646
 647                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 648                         maxlen = tfc_fdsize(sfd);
 649                         if (maxlen == NOFSIZE)
 650                                 xerror(NO, YES, YES,
 651                                 "Cannot verify embedded MAC with non-seekable source!");
 652                         maxlen -= TF_FROM_BITS(macbits);
 653                 }
 654                 srcfname = argv[idx];
 655                 idx++;
 656         }
 657
 658         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 659                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 660
 661         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 662         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 663
 664         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 665         errno = 0;
 666         if (counter_file) {
 667                 int ctrfd;
 668
 669                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 670                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 671                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 672                 lio = xread(ctrfd, ctr, ctrsz);
 673                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 674                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 675                 xclose(ctrfd);
 676         }
 677         else if (counter_opt == TFC_CTR_HEAD) {
 678                 pblk = ctr;
 679                 ldone = 0;
 680                 lrem = lblock = ctrsz;
 681                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 682 _ctrragain:     lio = xread(sfd, pblk, lrem);
 683                 if (lio != NOSIZE) ldone += lio;
 684                 else {
 685                         if (errno != EIO && catch_all_errors != YES)
 686                                 xerror(NO, NO, NO, "%s", srcfname);
 687                         switch (error_action) {
 688                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 689                                 case TFC_ERRACT_SYNC:
 690                                 case TFC_ERRACT_LSYNC:
 691                                         xerror(YES, NO, NO, "%s", srcfname);
 692                                         lio = ldone = lrem = lblock;
 693                                         memset(ctr, 0, lio);
 694                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 695                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 696                                         break;
 697                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 698                         }
 699                 }
 700                 if (lio && lio < lrem) {
 701                         pblk += lio;
 702                         lrem -= lio;
 703                         goto _ctrragain;
 704                 }
 705                 total_processed_src += ldone;
 706         }
 707
 708 _ctrskip1:
 709         if (iseek) {
 710                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 711                         iseek += ctrsz;
 712                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 713                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 714         }
 715
 716         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 717
 718         if (verbose) tfc_esay("%s: hashing password", progname);
 719
 720         if (rawkey == TFC_RAWKEY_KEYFILE) {
 721                 tfc_yesno xtskeyset = NO;
 722
 723                 pblk = key;
 724 _xts2key:       ldone = 0;
 725                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 726                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 727 _keyragain:     lio = xread(kfd, pblk, lrem);
 728                 if (lio != NOSIZE) ldone += lio;
 729                 else {
 730                         if (errno != EIO && catch_all_errors != YES)
 731                                 xerror(NO, NO, NO, "reading key");
 732                         switch (error_action) {
 733                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 734                                 case TFC_ERRACT_SYNC:
 735                                 case TFC_ERRACT_LSYNC:
 736                                         xerror(YES, NO, NO, "reading key");
 737                                         lio = ldone = lrem = lblock;
 738                                         memset(key, 0, lio);
 739                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 740                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 741                                         break;
 742                                 default: xerror(NO, NO, NO, "reading key"); break;
 743                         }
 744                 }
 745                 if (lio && lio < lrem) {
 746                         pblk += lio;
 747                         lrem -= lio;
 748                         goto _keyragain;
 749                 }
 750                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 751
 752                 if (ctr_mode == TFC_MODE_XTS) {
 753                         if (xtskeyset == NO) {
 754                                 pblk = xtskey;
 755                                 xtskeyset = YES;
 756                                 goto _xts2key;
 757                         }
 758                 }
 759         }
 760         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 761                 tfc_yesno xtskeyset = NO;
 762
 763                 pblk = key; n = sizeof(key);
 764 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 765                 getps.fd = getps.efd = -1;
 766                 getps.passwd = (char *)pblk;
 767                 getps.pwlen = n;
 768                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 769                 getps.charfilter = getps_filter;
 770                 getps.maskchar = 'x';
 771                 getps.flags = GETP_WAITFILL;
 772                 n = xgetpasswd(&getps);
 773                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 774                 if (n == ((size_t)-2)) xexit(1);
 775                 if (ctr_mode == TFC_MODE_XTS) {
 776                         if (xtskeyset == NO) {
 777                                 pblk = xtskey; n = sizeof(xtskey);
 778                                 xtskeyset = YES;
 779                                 goto _xts2keyaskstr;
 780                         }
 781                 }
 782         }
 783         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 784                 tfc_yesno xtskeyset = NO;
 785
 786                 pblk = key;
 787 _rawkey_hex_again:
 788                 memset(&getps, 0, sizeof(struct getpasswd_state));
 789                 getps.fd = getps.efd = -1;
 790                 getps.passwd = pwdask;
 791                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 792                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 793                 getps.charfilter = getps_hex_filter;
 794                 getps.maskchar = 'x';
 795                 getps.flags = GETP_WAITFILL;
 796                 n = xgetpasswd(&getps);
 797                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 798                 if (n == ((size_t)-2)) xexit(1);
 799                 if (n % 2) {
 800                         tfc_esay("Please input even number of hex digits!");
 801                         goto _rawkey_hex_again;
 802                 }
 803                 hex2bin(pblk, pwdask);
 804                 memset(pwdask, 0, sizeof(pwdask));
 805                 if (ctr_mode == TFC_MODE_XTS) {
 806                         if (xtskeyset == NO) {
 807                                 pblk = xtskey;
 808                                 xtskeyset = YES;
 809                                 goto _rawkey_hex_again;
 810                         }
 811                 }
 812         }
 813         else if (password) {
 814 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 815                 getps.fd = getps.efd = -1;
 816                 getps.passwd = pwdask;
 817                 getps.pwlen = sizeof(pwdask)-1;
 818                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 819                 getps.charfilter = getps_filter;
 820                 getps.maskchar = 'x';
 821                 getps.flags = GETP_WAITFILL;
 822                 n = xgetpasswd(&getps);
 823                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 824                 if (n == ((size_t)-2)) xexit(1);
 825                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 826                         getps.fd = getps.efd = -1;
 827                         getps.passwd = pwdagain;
 828                         getps.pwlen = sizeof(pwdagain)-1;
 829                         getps.echo = "Enter it again: ";
 830                         getps.flags = GETP_WAITFILL;
 831                         n = xgetpasswd(&getps);
 832                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 833                         if (n == ((size_t)-2)) xexit(1);
 834                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 835                                 tfc_esay("Passwords are different, try again");
 836                                 goto _pwdagain;
 837                         }
 838                 }
 839                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 840                 memset(pwdask, 0, sizeof(pwdask));
 841                 memset(pwdagain, 0, sizeof(pwdagain));
 842         }
 843         else {
 844                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 845                         xerror(NO, NO, YES, "hashing key");
 846         }
 847
 848         if (rawkey == NO) {
 849                 if (tfc_saltsz > 0) {
 850                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 851                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 852                 }
 853                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 854                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 855                 memset(tfc_salt, 0, TFC_MAX_SALT);
 856         }
 857
 858         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 859                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 860         }
 861
 862         if (genkeyf) {
 863                 int krfd;
 864                 tfc_yesno xtskeyset = NO;
 865
 866                 pblk = key;
 867                 if (!strcmp(genkeyf, "-")) krfd = 1;
 868                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 869                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 870 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 871                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 872                 if (verbose && xtskeyset == NO) {
 873                         tfc_esay("%s: password hashing done", progname);
 874                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 875                         tfc_esay("%s: Have a nice day!", progname);
 876                 }
 877
 878                 if (ctr_mode == TFC_MODE_XTS) {
 879                         if (xtskeyset == NO) {
 880                                 pblk = xtskey;
 881                                 xtskeyset = YES;
 882                                 goto _xts2genkey;
 883                         }
 884                 }
 885
 886                 fchmod(krfd, 0600);
 887                 xclose(krfd);
 888                 xexit(0);
 889         }
 890
 891         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 892                 if (verbose) tfc_esay("%s: disabling signature verification on "
 893                         "requested partial decryption.", progname);
 894                 do_mac = NO;
 895         }
 896
 897         if (do_mac != NO) {
 898                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 899                 if (ctr_mode < TFC_MODE_OCB) {
 900                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 901                                 "will be slower.", progname);
 902                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 903                         else skein_init(&sk, macbits);
 904                 }
 905         }
 906
 907         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 908                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 909         }
 910
 911         tf_convkey(key);
 912         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 913         if (do_tfcrypt1 == YES) {
 914                 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));
 915                 tf_key_tweak_compat(key);
 916         }
 917         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 918         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 919         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 920
 921         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 922
 923         switch (counter_opt) {
 924                 case TFC_CTR_SHOW:
 925                         switch (do_outfmt) {
 926                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 927                                 case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
 928                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 929                         }
 930                         break;
 931                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 932         }
 933
 934 _ctrskip2:
 935         if (kfd != -1) {
 936                 xclose(kfd);
 937                 kfd = -1;
 938         }
 939         if (verbose) tfc_esay("%s: password hashing done", progname);
 940
 941         if (overwrite_source && srcfname) argv[idx] = srcfname;
 942
 943 _plain:
 944         if (argv[idx]) {
 945                 if (!strcmp(argv[idx], "-")) dfd = 1;
 946                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 947                 if (dfd == -1) {
 948                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 949                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 950                 }
 951                 dstfname = argv[idx];
 952                 idx++;
 953         }
 954
 955         if (oseek) {
 956                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 957                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
 958         }
 959
 960         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 961         memset(&sigact, 0, sizeof(sigact));
 962         sigact.sa_flags = SA_RESTART;
 963         sigact.sa_handler = print_crypt_status;
 964         sigaction(SIGUSR1, &sigact, NULL);
 965         sigaction(SIGTSTP, &sigact, NULL);
 966         sigaction(SIGALRM, &sigact, NULL);
 967         if (status_timer) setup_next_alarm(status_timer);
 968         sigact.sa_handler = change_status_width;
 969         sigaction(SIGQUIT, &sigact, NULL);
 970         sigact.sa_handler = change_status_timer;
 971         sigaction(SIGUSR2, &sigact, NULL);
 972         if (quiet == NO) {
 973                 sigact.sa_handler = print_crypt_status;
 974                 sigaction(SIGINT, &sigact, NULL);
 975                 sigaction(SIGTERM, &sigact, NULL);
 976         }
 977         else {
 978                 sigact.sa_handler = exit_sigterm;
 979                 sigaction(SIGINT, &sigact, NULL);
 980                 sigaction(SIGTERM, &sigact, NULL);
 981         }
 982         memset(&sigact, 0, sizeof(struct sigaction));
 983
 984         tfc_getcurtime(&delta_time);
 985
 986         errno = 0;
 987         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 988                 pblk = ctr;
 989                 lio = lrem = ctrsz;
 990                 ldone = 0;
 991 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
 992                 if (lio != NOSIZE) ldone += lio;
 993                 else xerror(NO, NO, NO, "%s", dstfname);
 994                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 995                 if (lio < lrem) {
 996                         pblk += lio;
 997                         lrem -= lio;
 998                         goto _ctrwagain;
 999                 }
1000                 total_processed_dst += ldone;
1001                 delta_processed += ldone;
1002         }
1003
1004         errno = 0;
1005         do_stop = NO;
1006         while (1) {
1007                 if (do_stop) break;
1008                 pblk = srcblk;
1009                 ldone = 0;
1010                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1011                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1012 _ragain:        lio = xread(sfd, pblk, lrem);
1013                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
1014                 if (lio != NOSIZE) ldone += lio;
1015                 else {
1016                         if (errno != EIO && catch_all_errors != YES)
1017                                 xerror(NO, NO, NO, "%s", srcfname);
1018                         switch (error_action) {
1019                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1020                                 case TFC_ERRACT_SYNC:
1021                                 case TFC_ERRACT_LSYNC:
1022                                         xerror(YES, NO, NO, "%s", srcfname);
1023                                         lio = ldone = lrem = lblock;
1024                                         memset(srcblk, 0, lio);
1025                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1026                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1027                                         break;
1028                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1029                         }
1030                 }
1031                 if (lio && lio < lrem) {
1032                         pblk += lio;
1033                         lrem -= lio;
1034                         goto _ragain;
1035                 }
1036                 total_processed_src += ldone;
1037
1038                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1039                         size_t orig = ldone;
1040                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1041                         if (ldone > blksize) ldone = blksize;
1042                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1043                 }
1044
1045                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1046                         skein_update(&sk, srcblk, ldone);
1047
1048                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1049                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1050                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1051                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1052                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1053                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1054                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1055                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1056                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1057                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1058                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1059                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1060                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1061                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1062
1063                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1064                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1065                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1066                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1067
1068                 else if (ctr_mode == TFC_MODE_PLAIN)
1069                         memcpy(dstblk, srcblk, ldone);
1070
1071                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1072                         skein_update(&sk, dstblk, ldone);
1073                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1074
1075                 pblk = dstblk;
1076                 lrem = ldone;
1077                 ldone = 0;
1078 _wagain:        lio = xwrite(dfd, pblk, lrem);
1079                 if (lio != NOSIZE) ldone += lio;
1080                 else xerror(NO, NO, NO, "%s", dstfname);
1081                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1082                 if (lio < lrem) {
1083                         pblk += lio;
1084                         lrem -= lio;
1085                         goto _wagain;
1086                 }
1087 _nowrite:       total_processed_dst += ldone;
1088                 delta_processed += ldone;
1089
1090                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1091         }
1092
1093         if (do_stop == TFC_STOP_FULL) goto _nomac;
1094
1095         errno = 0;
1096         if (do_mac >= TFC_MAC_VRFY) {
1097                 if (!do_mac_file) {
1098                         pblk = macvrfy;
1099                         ldone = 0;
1100                         lrem = lblock = TF_FROM_BITS(macbits);
1101                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1102 _macragain:             lio = xread(sfd, pblk, lrem);
1103                         if (lio != NOSIZE) ldone += lio;
1104                         else {
1105                                 if (errno != EIO && catch_all_errors != YES)
1106                                         xerror(NO, NO, NO, "%s", srcfname);
1107                                 switch (error_action) {
1108                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1109                                         case TFC_ERRACT_SYNC:
1110                                         case TFC_ERRACT_LSYNC:
1111                                                 xerror(YES, NO, NO, "%s", srcfname);
1112                                                 lio = ldone = lrem = lblock;
1113                                                 memset(macvrfy, 0, lio);
1114                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1115                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1116                                                 break;
1117                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1118                                 }
1119                         }
1120                         if (lio && lio < lrem) {
1121                                 pblk += lio;
1122                                 lrem -= lio;
1123                                 goto _macragain;
1124                         }
1125                         total_processed_src += ldone;
1126                 }
1127                 else {
1128                         int mfd;
1129
1130                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1131                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1132                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1133                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1134                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1135                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1136                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1137                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1138                                 lio = TF_FROM_BITS(macbits);
1139                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1140                         }
1141                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1142                         xclose(mfd);
1143                 }
1144
1145                 if (ldone < TF_FROM_BITS(macbits)) {
1146                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1147                                 "not verifying", progname, ldone);
1148                         exitcode = 1;
1149                         goto _shortmac;
1150                 }
1151
1152                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1153                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1154
1155                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1156                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1157                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1158                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1159                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1160                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1161
1162                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1163                         if (quiet == NO) {
1164                                 tfc_esay("%s: signature is good", progname);
1165                                 if (verbose) {
1166                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1167                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1168                                 }
1169                         }
1170                 }
1171                 else {
1172                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1173                                 "wrong password, key, mode, or file is not signed", progname);
1174                         exitcode = 1;
1175                 }
1176
1177 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1178                 memset(macresult, 0, sizeof(macresult));
1179                 memset(tmpdata, 0, sizeof(tmpdata));
1180         }
1181
1182         else if (do_mac == TFC_MAC_SIGN) {
1183                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1184                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1185
1186                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1187                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1188                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1189                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1190                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1191                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1192                 memset(macresult, 0, sizeof(macresult));
1193
1194                 if (!do_mac_file) {
1195                         pblk = tmpdata;
1196                         lio = lrem = TF_FROM_BITS(macbits);
1197                         ldone = 0;
1198 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1199                         if (lio != NOSIZE) ldone += lio;
1200                         else xerror(NO, NO, NO, "%s", dstfname);
1201                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1202                         if (lio < lrem) {
1203                                 pblk += lio;
1204                                 lrem -= lio;
1205                                 goto _macwagain;
1206                         }
1207                         total_processed_dst += ldone;
1208                         delta_processed += ldone;
1209                 }
1210                 else {
1211                         int mfd;
1212
1213                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1214                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1215                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1216                         if (do_outfmt == TFC_OUTFMT_B64) {
1217                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1218                                 memset(tmpdata, 0, TFC_TMPSIZE);
1219                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1220                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1221                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1222                                 if (lrem) {
1223                                         tmpdata[lrem] = '\n';
1224                                         lrem++;
1225                                 }
1226                                 lio = xwrite(mfd, tmpdata, lrem);
1227                         }
1228                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1229                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1230                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1231                         xclose(mfd);
1232                 }
1233
1234                 memset(macvrfy, 0, sizeof(macvrfy));
1235                 memset(macresult, 0, sizeof(macresult));
1236                 memset(tmpdata, 0, sizeof(tmpdata));
1237         }
1238
1239 _nomac:
1240         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1241
1242         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1243         xclose(sfd);
1244         xclose(dfd);
1245
1246         xexit(exitcode);
1247         return -1;
1248 }