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