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 = tfc_fnamesize(s, YES);
 332                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 333                                                         if (maxkeylen == NOSIZE)
 334                                                                 xerror(NO, YES, YES,
 335                                                                 "%s: invalid key length value", s);
 336                                                 }
 337                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 338                                         }
 339                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 340                                                 s += 5;
 341                                                 keyoffset = tfc_humanfsize(s, &stoi);
 342                                                 if (!str_empty(stoi)) {
 343                                                         keyoffset = tfc_fnamesize(s, YES);
 344                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 345                                                         if (keyoffset == NOFSIZE)
 346                                                                 xerror(NO, YES, YES,
 347                                                                 "%s: invalid key offset value", s);
 348                                                 }
 349                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 350                                         }
 351                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 352                                                 s += 5;
 353                                                 ctrsz = tfc_humanfsize(s, &stoi);
 354                                                 if (!str_empty(stoi)) {
 355                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 356                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 357                                                         if (ctrsz == NOSIZE)
 358                                                                 xerror(NO, YES, YES,
 359                                                                 "%s: invalid counter length value", s);
 360                                                 }
 361                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 362                                                 if (ctrsz > TF_BLOCK_SIZE)
 363                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 364                                         }
 365                                         else xerror(NO, YES, YES, "invalid option %s", s);
 366                                 }
 367                                 break;
 368                         case 'S':
 369                                 do_mac = TFC_MAC_SIGN;
 370                                 if (strcasecmp(optarg, "mac") != 0)
 371                                         do_mac_file = optarg;
 372                                 break;
 373                         case 'M':
 374                                 do_mac = TFC_MAC_VRFY;
 375                                 if (!strcasecmp(optarg, "drop"))
 376                                         do_mac = TFC_MAC_DROP;
 377                                 else if (strcasecmp(optarg, "mac") != 0)
 378                                         do_mac_file = optarg;
 379                                 break;
 380                         case 'm':
 381                                 if (do_mac != TFC_MAC_VRFY)
 382                                         xerror(NO, YES, YES, "signature source was not specified");
 383                                 do_mac = TFC_MAC_JUST_VRFY;
 384                                 break;
 385                         case 'R':
 386                         case 'Z':
 387                                 if (maxlen != NOFSIZE) {
 388                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 389                                         else genrandom_nr_bytes = maxlen;
 390                                 }
 391                                 else {
 392                                         tfc_fsize t;
 393                                         if (!strcasecmp(optarg, "cbs"))
 394                                                 t = TF_BLOCK_SIZE;
 395                                         else if (!strcasecmp(optarg, "ks"))
 396                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 397                                         else if (!strcasecmp(optarg, "xks"))
 398                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 399                                         else if (!strcasecmp(optarg, "iobs"))
 400                                                 t = blksize;
 401                                         else {
 402                                                 t = tfc_humanfsize(optarg, &stoi);
 403                                                 if (!str_empty(stoi)) {
 404                                                         t = tfc_fnamesize(optarg, NO);
 405                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 406                                                 }
 407                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 408                                         }
 409                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 410                                         else genrandom_nr_bytes = maxlen = t;
 411                                 }
 412                                 break;
 413                         case 'a':
 414                                 do_preserve_time = YES;
 415                                 break;
 416                         case 'A':
 417                                 do_outfmt = TFC_OUTFMT_B64;
 418                                 break;
 419                         case 'W':
 420                                 do_outfmt = TFC_OUTFMT_RAW;
 421                                 break;
 422                         case 'H':
 423                                 do_outfmt = TFC_OUTFMT_HEX;
 424                                 break;
 425                         case 'q':
 426                                 quiet = YES;
 427                                 verbose = NO;
 428                                 status_timer = 0;
 429                                 break;
 430                         case 'v':
 431                                 verbose = YES;
 432                                 break;
 433                         case 'V':
 434                                 td = strtod(optarg, &stoi);
 435                                 status_timer = TFC_DTOUSECS(td);
 436                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 437                                 break;
 438                         default:
 439                                 usage();
 440                                 break;
 441                 }
 442         }
 443
 444         if (!strcmp(progname, "tfbench")) {
 445                 if (!*(argv+optind)) usage();
 446
 447                 td = strtod(*(argv+optind), &stoi);
 448                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 449                         xerror(NO, YES, YES,
 450                         "%s: invalid benchmark time in seconds", *(argv+optind));
 451                 bench_timer = TFC_DTOUSECS(td);
 452                 do_benchmark(bench_timer, td);
 453         }
 454         if (genrandom_nr_bytes) {
 455                 ctr_mode = TFC_MODE_STREAM;
 456                 do_edcrypt = TFC_DO_ENCRYPT;
 457                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 458         }
 459         if (genzero_nr_bytes) {
 460                 ctr_mode = TFC_MODE_PLAIN;
 461                 do_edcrypt = TFC_DO_PLAIN;
 462                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 463         }
 464
 465         if (rawkey && password)
 466                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 467         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 468                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 469         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 470                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 471         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 472                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 473         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 474                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 475         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 476                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 477         if (tweakf && do_tfcrypt1 == NO)
 478                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 479         if (ctr_mode == TFC_MODE_PLAIN
 480         && (do_edcrypt || do_mac || rawkey
 481         || mackey_opt || counter_opt || counter_file))
 482                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 483
 484         errno = 0;
 485         do_stop = NO;
 486
 487         if (saltf) {
 488                 int saltfd;
 489
 490                 memset(tfc_salt, 0, TFC_MAX_SALT);
 491                 tfc_saltsz = 0;
 492                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 493
 494                 if (!strcmp(saltf, "-")) saltfd = 0;
 495                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 496                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 497                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 498                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 499                 tfc_saltsz = lio;
 500                 xclose(saltfd);
 501         }
 502
 503 _nosalt:
 504         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 505                 int mkfd = -1;
 506                 tfc_yesno do_stop;
 507
 508                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 509                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 510                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 511
 512                 skein_init(&sk, TFC_KEY_BITS);
 513
 514                 do_stop = NO;
 515                 while (1) {
 516                         if (do_stop) break;
 517                         pblk = tmpdata;
 518                         ldone = 0;
 519                         lrem = lblock = sizeof(tmpdata);
 520                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 521 _mkragain:              lio = xread(mkfd, pblk, lrem);
 522                         if (lio == 0) do_stop = YES;
 523                         if (lio != NOSIZE) ldone += lio;
 524                         else {
 525                                 if (errno != EIO && catch_all_errors != YES)
 526                                         xerror(NO, NO, NO, "%s", mackeyf);
 527                                 switch (error_action) {
 528                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 529                                         case TFC_ERRACT_SYNC:
 530                                         case TFC_ERRACT_LSYNC:
 531                                                 xerror(YES, NO, NO, "%s", mackeyf);
 532                                                 lio = ldone = lrem = lblock;
 533                                                 memset(tmpdata, 0, lio);
 534                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 535                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 536                                                 break;
 537                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 538                                 }
 539                         }
 540                         if (lio && lio < lrem) {
 541                                 pblk += lio;
 542                                 lrem -= lio;
 543                                 goto _mkragain;
 544                         }
 545
 546                         skein_update(&sk, tmpdata, ldone);
 547                 }
 548
 549                 skein_final(mackey, &sk);
 550
 551                 xclose(mkfd);
 552         }
 553         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 554                 memset(&getps, 0, sizeof(struct getpasswd_state));
 555                 getps.fd = getps.efd = -1;
 556                 getps.passwd = pwdask;
 557                 getps.pwlen = sizeof(pwdask)-1;
 558                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 559                 getps.charfilter = getps_filter;
 560                 getps.maskchar = 'x';
 561                 getps.flags = GETP_WAITFILL;
 562                 n = xgetpasswd(&getps);
 563                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 564                 if (n == ((size_t)-2)) xexit(1);
 565                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 566                 if (verbose) {
 567                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 568                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 569                         tfc_nfsay(stderr, "MAC password hint: ");
 570                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 571                         memset(tmpdata, 0, sizeof(tmpdata));
 572                 }
 573         }
 574
 575
 576         if ((strlen(progname) <= 9)
 577         && ((!strcmp(progname, "sksum"))
 578         || ((!memcmp(progname, "sk", 2))
 579         && (!memcmp(progname+3, "sum", 3)
 580         || !memcmp(progname+4, "sum", 3)
 581         || !memcmp(progname+5, "sum", 3)
 582         || !memcmp(progname+6, "sum", 3)))))
 583                 do_sksum(progname, argv+optind);
 584         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 585
 586         idx = optind;
 587
 588         if (argv[idx]) {
 589                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 590                 if (!strcmp(argv[idx], "-")) kfd = 0;
 591                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 592                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 593
 594                 lio = strnlen(argv[idx], PATH_MAX);
 595                 memset(argv[idx], '*', lio);
 596
 597                 idx++;
 598         }
 599         else password = YES;
 600
 601         errno = 0;
 602         if (do_tfcrypt1 == YES && tweakf) {
 603                 int twfd;
 604
 605                 if (!strcmp(tweakf, "-")) twfd = 0;
 606                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 607                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 608                 lio = ldone = xread(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 609                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 610                 if (ldone < 2*TF_SIZE_UNIT)
 611                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 612                 xclose(twfd);
 613         }
 614
 615 _nokeyfd:
 616         errno = 0;
 617         if (argv[idx]) {
 618                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 619                 else {
 620                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 621                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 622                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 623                 }
 624                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 625
 626                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 627                         if (verbose) tfc_esay("%s: disabling signature verification on "
 628                                 "requested partial decryption.", progname);
 629                         do_mac = NO;
 630                 }
 631
 632                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 633                         maxlen = tfc_fdsize(sfd);
 634                         if (maxlen == NOFSIZE)
 635                                 xerror(NO, YES, YES,
 636                                 "Cannot verify embedded MAC with non-seekable source!");
 637                         maxlen -= TF_FROM_BITS(macbits);
 638                 }
 639                 srcfname = argv[idx];
 640                 idx++;
 641         }
 642
 643         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 644                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 645
 646         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 647         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 648
 649         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 650         errno = 0;
 651         if (counter_file) {
 652                 int ctrfd;
 653
 654                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 655                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 656                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 657                 lio = xread(ctrfd, ctr, ctrsz);
 658                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 659                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 660                 xclose(ctrfd);
 661         }
 662         else if (counter_opt == TFC_CTR_HEAD) {
 663                 pblk = ctr;
 664                 ldone = 0;
 665                 lrem = lblock = ctrsz;
 666                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 667 _ctrragain:     lio = xread(sfd, pblk, lrem);
 668                 if (lio != NOSIZE) ldone += lio;
 669                 else {
 670                         if (errno != EIO && catch_all_errors != YES)
 671                                 xerror(NO, NO, NO, "%s", srcfname);
 672                         switch (error_action) {
 673                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 674                                 case TFC_ERRACT_SYNC:
 675                                 case TFC_ERRACT_LSYNC:
 676                                         xerror(YES, NO, NO, "%s", srcfname);
 677                                         lio = ldone = lrem = lblock;
 678                                         memset(ctr, 0, lio);
 679                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 680                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 681                                         break;
 682                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 683                         }
 684                 }
 685                 if (lio && lio < lrem) {
 686                         pblk += lio;
 687                         lrem -= lio;
 688                         goto _ctrragain;
 689                 }
 690                 total_processed_src += ldone;
 691         }
 692
 693 _ctrskip1:
 694         if (iseek) {
 695                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 696                         iseek += ctrsz;
 697                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 698                         xerror(YES, NO, NO, "%s: seek failed", srcfname);
 699         }
 700
 701         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 702
 703         if (verbose) tfc_esay("%s: hashing password", progname);
 704
 705         if (rawkey == TFC_RAWKEY_KEYFILE) {
 706                 tfc_yesno xtskeyset = NO;
 707
 708                 pblk = key;
 709 _xts2key:       ldone = 0;
 710                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 711                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 712 _keyragain:     lio = xread(kfd, pblk, lrem);
 713                 if (lio != NOSIZE) ldone += lio;
 714                 else {
 715                         if (errno != EIO && catch_all_errors != YES)
 716                                 xerror(NO, NO, NO, "reading key");
 717                         switch (error_action) {
 718                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 719                                 case TFC_ERRACT_SYNC:
 720                                 case TFC_ERRACT_LSYNC:
 721                                         xerror(YES, NO, NO, "reading key");
 722                                         lio = ldone = lrem = lblock;
 723                                         memset(key, 0, lio);
 724                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 725                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 726                                         break;
 727                                 default: xerror(NO, NO, NO, "reading key"); break;
 728                         }
 729                 }
 730                 if (lio && lio < lrem) {
 731                         pblk += lio;
 732                         lrem -= lio;
 733                         goto _keyragain;
 734                 }
 735                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 736
 737                 if (ctr_mode == TFC_MODE_XTS) {
 738                         if (xtskeyset == NO) {
 739                                 pblk = xtskey;
 740                                 xtskeyset = YES;
 741                                 goto _xts2key;
 742                         }
 743                 }
 744         }
 745         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 746                 tfc_yesno xtskeyset = NO;
 747
 748                 pblk = key; n = sizeof(key);
 749 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 750                 getps.fd = getps.efd = -1;
 751                 getps.passwd = (char *)pblk;
 752                 getps.pwlen = n;
 753                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 754                 getps.charfilter = getps_filter;
 755                 getps.maskchar = 'x';
 756                 getps.flags = GETP_WAITFILL;
 757                 n = xgetpasswd(&getps);
 758                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 759                 if (n == ((size_t)-2)) xexit(1);
 760                 if (ctr_mode == TFC_MODE_XTS) {
 761                         if (xtskeyset == NO) {
 762                                 pblk = xtskey; n = sizeof(xtskey);
 763                                 xtskeyset = YES;
 764                                 goto _xts2keyaskstr;
 765                         }
 766                 }
 767         }
 768         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 769                 tfc_yesno xtskeyset = NO;
 770
 771                 pblk = key;
 772 _rawkey_hex_again:
 773                 memset(&getps, 0, sizeof(struct getpasswd_state));
 774                 getps.fd = getps.efd = -1;
 775                 getps.passwd = pwdask;
 776                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 777                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 778                 getps.charfilter = getps_hex_filter;
 779                 getps.maskchar = 'x';
 780                 getps.flags = GETP_WAITFILL;
 781                 n = xgetpasswd(&getps);
 782                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 783                 if (n == ((size_t)-2)) xexit(1);
 784                 if (n % 2) {
 785                         tfc_esay("Please input even number of hex digits!");
 786                         goto _rawkey_hex_again;
 787                 }
 788                 hex2bin(pblk, pwdask);
 789                 memset(pwdask, 0, sizeof(pwdask));
 790                 if (ctr_mode == TFC_MODE_XTS) {
 791                         if (xtskeyset == NO) {
 792                                 pblk = xtskey;
 793                                 xtskeyset = YES;
 794                                 goto _rawkey_hex_again;
 795                         }
 796                 }
 797         }
 798         else if (password) {
 799 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 800                 getps.fd = getps.efd = -1;
 801                 getps.passwd = pwdask;
 802                 getps.pwlen = sizeof(pwdask)-1;
 803                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 804                 getps.charfilter = getps_filter;
 805                 getps.maskchar = 'x';
 806                 getps.flags = GETP_WAITFILL;
 807                 n = xgetpasswd(&getps);
 808                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 809                 if (n == ((size_t)-2)) xexit(1);
 810                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 811                         getps.fd = getps.efd = -1;
 812                         getps.passwd = pwdagain;
 813                         getps.pwlen = sizeof(pwdagain)-1;
 814                         getps.echo = "Enter it again: ";
 815                         getps.flags = GETP_WAITFILL;
 816                         n = xgetpasswd(&getps);
 817                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 818                         if (n == ((size_t)-2)) xexit(1);
 819                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 820                                 tfc_esay("Passwords are different, try again");
 821                                 goto _pwdagain;
 822                         }
 823                 }
 824                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 825                 memset(pwdask, 0, sizeof(pwdask));
 826                 memset(pwdagain, 0, sizeof(pwdagain));
 827         }
 828         else {
 829                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 830                         xerror(NO, NO, YES, "hashing key");
 831         }
 832
 833         if (rawkey == NO) {
 834                 if (tfc_saltsz > 0) {
 835                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 836                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 837                 }
 838                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 839                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 840                 memset(tfc_salt, 0, TFC_MAX_SALT);
 841         }
 842
 843         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 844                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 845         }
 846
 847         if (genkeyf) {
 848                 int krfd;
 849                 tfc_yesno xtskeyset = NO;
 850
 851                 pblk = key;
 852                 if (!strcmp(genkeyf, "-")) krfd = 1;
 853                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 854                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 855 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 856                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 857                 if (verbose && xtskeyset == NO) {
 858                         tfc_esay("%s: password hashing done", progname);
 859                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 860                         tfc_esay("%s: Have a nice day!", progname);
 861                 }
 862
 863                 if (ctr_mode == TFC_MODE_XTS) {
 864                         if (xtskeyset == NO) {
 865                                 pblk = xtskey;
 866                                 xtskeyset = YES;
 867                                 goto _xts2genkey;
 868                         }
 869                 }
 870
 871                 fchmod(krfd, 0600);
 872                 xclose(krfd);
 873                 xexit(0);
 874         }
 875
 876         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 877                 if (verbose) tfc_esay("%s: disabling signature verification on "
 878                         "requested partial decryption.", progname);
 879                 do_mac = NO;
 880         }
 881
 882         if (do_mac != NO) {
 883                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 884                 if (ctr_mode < TFC_MODE_OCB) {
 885                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 886                                 "will be slower.", progname);
 887                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 888                         else skein_init(&sk, macbits);
 889                 }
 890         }
 891
 892         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 893                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 894         }
 895
 896         tf_convkey(key);
 897         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 898         if (do_tfcrypt1 == YES) {
 899                 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));
 900                 tf_key_tweak_compat(key);
 901         }
 902         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 903         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 904         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 905         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 906
 907         switch (counter_opt) {
 908                 case TFC_CTR_SHOW:
 909                         switch (do_outfmt) {
 910                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 911                                 case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
 912                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 913                         }
 914                         break;
 915                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 916         }
 917
 918 _ctrskip2:
 919         if (kfd != -1) {
 920                 xclose(kfd);
 921                 kfd = -1;
 922         }
 923         if (verbose) tfc_esay("%s: password hashing done", progname);
 924
 925         if (overwrite_source && srcfname) argv[idx] = srcfname;
 926
 927 _plain:
 928         if (argv[idx]) {
 929                 if (!strcmp(argv[idx], "-")) dfd = 1;
 930                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 931                 if (dfd == -1) {
 932                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 933                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 934                 }
 935                 dstfname = argv[idx];
 936                 idx++;
 937         }
 938
 939         if (oseek) {
 940                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 941                         xerror(YES, NO, NO, "%s: seek failed", dstfname);
 942         }
 943
 944         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 945         memset(&sigact, 0, sizeof(sigact));
 946         sigact.sa_flags = SA_RESTART;
 947         sigact.sa_handler = print_crypt_status;
 948         sigaction(SIGUSR1, &sigact, NULL);
 949         sigaction(SIGTSTP, &sigact, NULL);
 950         sigaction(SIGALRM, &sigact, NULL);
 951         if (status_timer) setup_next_alarm(status_timer);
 952         sigact.sa_handler = change_status_width;
 953         sigaction(SIGQUIT, &sigact, NULL);
 954         sigact.sa_handler = change_status_timer;
 955         sigaction(SIGUSR2, &sigact, NULL);
 956         if (quiet == NO) {
 957                 sigact.sa_handler = print_crypt_status;
 958                 sigaction(SIGINT, &sigact, NULL);
 959                 sigaction(SIGTERM, &sigact, NULL);
 960         }
 961         else {
 962                 sigact.sa_handler = exit_sigterm;
 963                 sigaction(SIGINT, &sigact, NULL);
 964                 sigaction(SIGTERM, &sigact, NULL);
 965         }
 966         memset(&sigact, 0, sizeof(struct sigaction));
 967
 968         tfc_getcurtime(&delta_time);
 969
 970         errno = 0;
 971         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 972                 pblk = ctr;
 973                 lio = lrem = ctrsz;
 974                 ldone = 0;
 975 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
 976                 if (lio != NOSIZE) ldone += lio;
 977                 else xerror(NO, NO, NO, "%s", dstfname);
 978                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 979                 if (lio < lrem) {
 980                         pblk += lio;
 981                         lrem -= lio;
 982                         goto _ctrwagain;
 983                 }
 984                 total_processed_dst += ldone;
 985                 delta_processed += ldone;
 986         }
 987
 988         errno = 0;
 989         do_stop = NO;
 990         while (1) {
 991                 if (do_stop) break;
 992                 pblk = srcblk;
 993                 ldone = 0;
 994                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
 995                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 996 _ragain:        lio = xread(sfd, pblk, lrem);
 997                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
 998                 if (lio != NOSIZE) ldone += lio;
 999                 else {
1000                         if (errno != EIO && catch_all_errors != YES)
1001                                 xerror(NO, NO, NO, "%s", srcfname);
1002                         switch (error_action) {
1003                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1004                                 case TFC_ERRACT_SYNC:
1005                                 case TFC_ERRACT_LSYNC:
1006                                         xerror(YES, NO, NO, "%s", srcfname);
1007                                         lio = ldone = lrem = lblock;
1008                                         memset(srcblk, 0, lio);
1009                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1010                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1011                                         break;
1012                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1013                         }
1014                 }
1015                 if (lio && lio < lrem) {
1016                         pblk += lio;
1017                         lrem -= lio;
1018                         goto _ragain;
1019                 }
1020                 total_processed_src += ldone;
1021
1022                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1023                         size_t orig = ldone;
1024                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1025                         if (ldone > blksize) ldone = blksize;
1026                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1027                 }
1028
1029                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1030                         skein_update(&sk, srcblk, ldone);
1031
1032                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1033                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1034                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1035                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1036                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1037                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1038                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1039                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1040                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1041                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1042                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1043                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1044                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1045                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1046
1047                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1048                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1049                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1050                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1051
1052                 else if (ctr_mode == TFC_MODE_PLAIN)
1053                         memcpy(dstblk, srcblk, ldone);
1054
1055                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1056                         skein_update(&sk, dstblk, ldone);
1057                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1058
1059                 pblk = dstblk;
1060                 lrem = ldone;
1061                 ldone = 0;
1062 _wagain:        lio = xwrite(dfd, pblk, lrem);
1063                 if (lio != NOSIZE) ldone += lio;
1064                 else xerror(NO, NO, NO, "%s", dstfname);
1065                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1066                 if (lio < lrem) {
1067                         pblk += lio;
1068                         lrem -= lio;
1069                         goto _wagain;
1070                 }
1071 _nowrite:       total_processed_dst += ldone;
1072                 delta_processed += ldone;
1073
1074                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1075         }
1076
1077         if (do_stop == TFC_STOP_FULL) goto _nomac;
1078
1079         errno = 0;
1080         if (do_mac >= TFC_MAC_VRFY) {
1081                 if (!do_mac_file) {
1082                         pblk = macvrfy;
1083                         ldone = 0;
1084                         lrem = lblock = TF_FROM_BITS(macbits);
1085                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1086 _macragain:             lio = xread(sfd, pblk, lrem);
1087                         if (lio != NOSIZE) ldone += lio;
1088                         else {
1089                                 if (errno != EIO && catch_all_errors != YES)
1090                                         xerror(NO, NO, NO, "%s", srcfname);
1091                                 switch (error_action) {
1092                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1093                                         case TFC_ERRACT_SYNC:
1094                                         case TFC_ERRACT_LSYNC:
1095                                                 xerror(YES, NO, NO, "%s", srcfname);
1096                                                 lio = ldone = lrem = lblock;
1097                                                 memset(macvrfy, 0, lio);
1098                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1099                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1100                                                 break;
1101                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1102                                 }
1103                         }
1104                         if (lio && lio < lrem) {
1105                                 pblk += lio;
1106                                 lrem -= lio;
1107                                 goto _macragain;
1108                         }
1109                         total_processed_src += ldone;
1110                 }
1111                 else {
1112                         int mfd;
1113
1114                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1115                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1116                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1117                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1118                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1119                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1120                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1121                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1122                                 lio = TF_FROM_BITS(macbits);
1123                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1124                         }
1125                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1126                         xclose(mfd);
1127                 }
1128
1129                 if (ldone < TF_FROM_BITS(macbits)) {
1130                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1131                                 "not verifying", progname, ldone);
1132                         exitcode = 1;
1133                         goto _shortmac;
1134                 }
1135
1136                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1137                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1138
1139                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1140                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1141                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1142                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1143                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1144                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1145
1146                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1147                         if (quiet == NO) {
1148                                 tfc_esay("%s: signature is good", progname);
1149                                 if (verbose) {
1150                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1151                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1152                                 }
1153                         }
1154                 }
1155                 else {
1156                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1157                                 "wrong password, key, mode, or file is not signed", progname);
1158                         exitcode = 1;
1159                 }
1160
1161 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1162                 memset(macresult, 0, sizeof(macresult));
1163                 memset(tmpdata, 0, sizeof(tmpdata));
1164         }
1165
1166         else if (do_mac == TFC_MAC_SIGN) {
1167                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1168                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1169
1170                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1171                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1172                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1173                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1174                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1175                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1176                 memset(macresult, 0, sizeof(macresult));
1177
1178                 if (!do_mac_file) {
1179                         pblk = tmpdata;
1180                         lio = lrem = TF_FROM_BITS(macbits);
1181                         ldone = 0;
1182 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1183                         if (lio != NOSIZE) ldone += lio;
1184                         else xerror(NO, NO, NO, "%s", dstfname);
1185                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1186                         if (lio < lrem) {
1187                                 pblk += lio;
1188                                 lrem -= lio;
1189                                 goto _macwagain;
1190                         }
1191                         total_processed_dst += ldone;
1192                         delta_processed += ldone;
1193                 }
1194                 else {
1195                         int mfd;
1196
1197                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1198                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1199                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1200                         if (do_outfmt == TFC_OUTFMT_B64) {
1201                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1202                                 memset(tmpdata, 0, TFC_TMPSIZE);
1203                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1204                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1205                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1206                                 if (lrem) {
1207                                         tmpdata[lrem] = '\n';
1208                                         lrem++;
1209                                 }
1210                                 lio = xwrite(mfd, tmpdata, lrem);
1211                         }
1212                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1213                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1214                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1215                         xclose(mfd);
1216                 }
1217
1218                 memset(macvrfy, 0, sizeof(macvrfy));
1219                 memset(macresult, 0, sizeof(macresult));
1220                 memset(tmpdata, 0, sizeof(tmpdata));
1221         }
1222
1223 _nomac:
1224         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1225
1226         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1227         xclose(sfd);
1228         xclose(dfd);
1229
1230         xexit(exitcode);
1231         return -1;
1232 }