tfcrypt.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
   6  *
   7  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  24  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "tfcrypt.h"
  30
  31 static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
  32 {
  33         if (chr == '\x03') {
  34                 getps->retn = ((size_t)-2);
  35                 return 6;
  36         }
  37         return 1;
  38 }
  39
  40 static int getps_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  41 {
  42         if (chr == '\x03') {
  43                 getps->retn = ((size_t)-2);
  44                 return 6;
  45         }
  46         if (chr >= '0' && chr <= '9') return 1;
  47         if (chr >= 'a' && chr <= 'f') return 1;
  48         if (chr >= 'A' && chr <= 'F') return 1;
  49         if (chr == '\x7f' || chr == '\x08'
  50         || chr == '\x15' || chr == '\x17') return 1;
  51         return 0;
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56         int c;
  57         double td;
  58         char *s, *d, *t, *stoi;
  59         size_t x, n;
  60
  61         progname = basename(argv[0]);
  62
  63         if (!isatty(2)) do_statline_dynamic = NO;
  64
  65         s = (char *)srcblk;
  66         d = getenv("HOME");
  67         if (!d) d = "";
  68         n = PATH_MAX > sizeof(srcblk) ? sizeof(srcblk) : PATH_MAX;
  69         if (xstrlcpy(s, d, n) >= n) goto _baddfname;
  70         if (xstrlcat(s, "/.tfcrypt.defs", n) >= n) goto _baddfname;
  71         read_defaults(s, YES);
  72 _baddfname:
  73         memset(s, 0, n);
  74
  75         opterr = 0;
  76         while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:TPkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
  77                 switch (c) {
  78                         case 'L':
  79                                 read_defaults(optarg, NO);
  80                                 break;
  81                         case 's':
  82                                 saltf = optarg;
  83                                 break;
  84                         case 'r':
  85                                 randsource = optarg;
  86                                 break;
  87                         case 'c':
  88                                 if (!strcasecmp(optarg, "show"))
  89                                         counter_opt = TFC_CTR_SHOW;
  90                                 else if (!strcasecmp(optarg, "head"))
  91                                         counter_opt = TFC_CTR_HEAD;
  92                                 else if (!strcasecmp(optarg, "rand"))
  93                                         counter_opt = TFC_CTR_RAND;
  94                                 else counter_file = sksum_hashlist_file = optarg;
  95                                 break;
  96                         case 'C':
  97                                 if (!strcasecmp(optarg, "ctr"))
  98                                         ctr_mode = TFC_MODE_CTR;
  99                                 else if (!strcasecmp(optarg, "stream"))
 100                                         ctr_mode = TFC_MODE_STREAM;
 101                                 else if (!strcasecmp(optarg, "cbc"))
 102                                         ctr_mode = TFC_MODE_CBC;
 103                                 else if (!strcasecmp(optarg, "ecb"))
 104                                         ctr_mode = TFC_MODE_ECB;
 105                                 else if (!strcasecmp(optarg, "xts"))
 106                                         ctr_mode = TFC_MODE_XTS;
 107                                 else if (!strcasecmp(optarg, "ocb"))
 108                                         ctr_mode = TFC_MODE_OCB;
 109                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
 110                                 break;
 111                         case 'P':
 112                                 do_edcrypt = TFC_DO_PLAIN;
 113                                 password = YES;
 114                                 ctr_mode = TFC_MODE_PLAIN;
 115                                 break;
 116                         case 'e':
 117                                 do_edcrypt = TFC_DO_ENCRYPT;
 118                                 break;
 119                         case 'd':
 120                                 do_edcrypt = TFC_DO_DECRYPT;
 121                                 break;
 122                         case 'D':
 123                                 macbits = strtoul(optarg, &stoi, 10);
 124                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 125                                 || macbits > TF_MAX_BITS || macbits % 8)
 126                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 127                                 break;
 128                         case 'n':
 129                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 130                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 131                                 break;
 132                         case 'U':
 133                                 if (!strcasecmp(optarg, "key"))
 134                                         mackey_opt = TFC_MACKEY_RAWKEY;
 135                                 else if (!strcasecmp(optarg, "pwd"))
 136                                         mackey_opt = TFC_MACKEY_PASSWORD;
 137                                 else {
 138                                         mackey_opt = TFC_MACKEY_FILE;
 139                                         mackeyf = optarg;
 140                                 }
 141                                 break;
 142                         case 'p':
 143                                 password = YES;
 144                                 break;
 145                         case 'k':
 146                                 rawkey = TFC_RAWKEY_KEYFILE;
 147                                 break;
 148                         case 'z':
 149                                 rawkey = TFC_RAWKEY_ASKSTR;
 150                                 break;
 151                         case 'x':
 152                                 rawkey = TFC_RAWKEY_ASKHEX;
 153                                 break;
 154                         case 'K':
 155                                 verbose = YES;
 156                                 genkeyf = optarg;
 157                                 break;
 158                         case 't':
 159                                 tweakf = optarg;
 160                                 break;
 161                         case 'T':
 162                                 tfc_saltsz = 0;
 163                                 do_tfcrypt1 = YES;
 164                                 break;
 165                         case 'l':
 166                                 if (maxlen != NOFSIZE) break;
 167
 168                                 maxlen = tfc_humanfsize(optarg, &stoi);
 169                                 if (!str_empty(stoi)) {
 170                                         maxlen = tfc_fnamesize(optarg, YES);
 171                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 172                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 173                                         "%s: invalid count value", optarg);
 174                                 }
 175                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 176                                 if (counter_opt == TFC_CTR_HEAD)
 177                                         maxlen += TF_BLOCK_SIZE;
 178                                 break;
 179                         case 'w':
 180                                 overwrite_source = YES;
 181                                 break;
 182                         case 'E':
 183                                 if (!strcmp(optarg, "xall")) {
 184                                         catch_all_errors = YES;
 185                                         break;
 186                                 }
 187                                 if (!strcmp(optarg, "xseek")) {
 188                                         ignore_seek_errors = YES;
 189                                         break;
 190                                 }
 191                                 if (!strcmp(optarg, "exit"))
 192                                         error_action = TFC_ERRACT_EXIT;
 193                                 else if (!strncmp(optarg, "cont", 4))
 194                                         error_action = TFC_ERRACT_CONT;
 195                                 else if (!strcmp(optarg, "sync"))
 196                                         error_action = TFC_ERRACT_SYNC;
 197                                 else if (!strcmp(optarg, "lsync"))
 198                                         error_action = TFC_ERRACT_LSYNC;
 199                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 200                                 break;
 201                         case 'O':
 202                                 s = d = optarg; t = NULL;
 203                                 while ((s = strtok_r(d, ",", &t))) {
 204                                         if (d) d = NULL;
 205                                         if (!strcmp(s, "sync"))
 206                                                 write_flags |= O_SYNC;
 207                                         else if (!strcmp(s, "trunc"))
 208                                                 write_flags |= O_TRUNC;
 209                                         else if (!strcmp(s, "fsync"))
 210                                                 do_fsync = YES;
 211                                         else if (!strcmp(s, "pad"))
 212                                                 do_pad = YES;
 213                                         else if (!strcmp(s, "xtime"))
 214                                                 do_preserve_time = YES;
 215                                         else if (!strcmp(s, "gibsize"))
 216                                                 do_stats_in_gibs = YES;
 217                                         else if (!strcmp(s, "plainstats"))
 218                                                 do_statline_dynamic = NO;
 219                                         else if (!strcmp(s, "statless"))
 220                                                 do_less_stats = YES;
 221                                         else if (!strcmp(s, "norepeat"))
 222                                                 no_repeat = YES;
 223                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 224                                                 pw_prompt = s+7;
 225                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 226                                                 mac_pw_prompt = s+10;
 227                                         else if (!strcmp(s, "shorthex"))
 228                                                 do_full_hexdump = NO;
 229                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 230                                                 s += 5;
 231                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 232                                                 if (!str_empty(stoi)) {
 233                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 234                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 235                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 236                                                         "%s: invalid block size value", s);
 237                                                 }
 238                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 239                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 240                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 241                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 242                                                         "%s: block size exceeds %u bytes",
 243                                                         s, TFC_U(TFC_BLKSIZE));
 244                                         }
 245                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 246                                                 s += 10;
 247                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 248                                                 if (!str_empty(stoi)) {
 249                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 250                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 251                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 252                                                         "%s: invalid blocks per xts block value", s);
 253                                                 }
 254                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 255                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 256                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 257                                                         s, TFC_U(TFC_BLKSIZE));
 258                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 259                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 260                                                         s, TFC_U(TFC_BLKSIZE));
 261                                         }
 262                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 263                                                 s += 6;
 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 iseek value", s);
 270                                                 }
 271                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 272                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 273                                                         xerror(NO, YES, YES,
 274                                                                 "%s: not round to TF block size "
 275                                                                 "of %u bytes",
 276                                                                 s, TFC_U(TF_BLOCK_SIZE));
 277                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 278                                         }
 279                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 280                                                 s += 7;
 281                                                 iseek = tfc_humanfsize(s, &stoi);
 282                                                 if (!str_empty(stoi)) {
 283                                                         iseek = tfc_fnamesize(s, YES);
 284                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 285                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 286                                                                 "%s: invalid ixseek value", s);
 287                                                 }
 288                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 289                                         }
 290                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 291                                                 s += 5;
 292                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 293                                                 if (!str_empty(stoi)) {
 294                                                         iseek_blocks = tfc_fnamesize(s, YES);
 295                                                         if (iseek_blocks == NOFSIZE)
 296                                                                 xerror(NO, YES, YES,
 297                                                                 "%s: invalid ictr value", s);
 298                                                         iseek_blocks /= TF_BLOCK_SIZE;
 299                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 300                                                 }
 301                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 302                                         }
 303                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 304                                                 s += 6;
 305                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 306                                                 if (!str_empty(stoi)) {
 307                                                         iseek_blocks = tfc_fnamesize(s, YES);
 308                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 309                                                         if (iseek_blocks == NOFSIZE)
 310                                                                 xerror(NO, YES, YES,
 311                                                                 "%s: invalid ixctr value", s);
 312                                                 }
 313                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 314                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 315                                                         xerror(NO, YES, YES,
 316                                                         "%s: not round to TF block size "
 317                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 318                                                 iseek_blocks /= TF_BLOCK_SIZE;
 319                                         }
 320                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 321                                                 s += 6;
 322                                                 oseek = tfc_humanfsize(s, &stoi);
 323                                                 if (!str_empty(stoi)) {
 324                                                         oseek = tfc_fnamesize(s, YES);
 325                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 326                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 327                                                         "%s: invalid oseek value", s);
 328                                                 }
 329                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 330                                         }
 331                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 332                                                 s += 6;
 333                                                 maxlen = tfc_humanfsize(s, &stoi);
 334                                                 if (!str_empty(stoi)) {
 335                                                         maxlen = tfc_fnamesize(s, YES);
 336                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 337                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 338                                                         "%s: invalid count value", s);
 339                                                 }
 340                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 341                                                 if (counter_opt == TFC_CTR_HEAD)
 342                                                         maxlen += TF_BLOCK_SIZE;
 343                                         }
 344                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 345                                                 s += 5;
 346                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 347                                                 if (!str_empty(stoi)) {
 348                                                         maxkeylen = tfc_fnamesize(s, YES);
 349                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 350                                                         if (maxkeylen == NOSIZE)
 351                                                                 xerror(NO, YES, YES,
 352                                                                 "%s: invalid key length value", s);
 353                                                 }
 354                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 355                                         }
 356                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 357                                                 s += 5;
 358                                                 keyoffset = tfc_humanfsize(s, &stoi);
 359                                                 if (!str_empty(stoi)) {
 360                                                         keyoffset = tfc_fnamesize(s, YES);
 361                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 362                                                         if (keyoffset == NOFSIZE)
 363                                                                 xerror(NO, YES, YES,
 364                                                                 "%s: invalid key offset value", s);
 365                                                 }
 366                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 367                                         }
 368                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 369                                                 s += 5;
 370                                                 ctrsz = tfc_humanfsize(s, &stoi);
 371                                                 if (!str_empty(stoi)) {
 372                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 373                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 374                                                         if (ctrsz == NOSIZE)
 375                                                                 xerror(NO, YES, YES,
 376                                                                 "%s: invalid counter length value", s);
 377                                                 }
 378                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 379                                                 if (ctrsz > TF_BLOCK_SIZE)
 380                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 381                                         }
 382                                         else xerror(NO, YES, YES, "invalid option %s", s);
 383                                 }
 384                                 break;
 385                         case 'S':
 386                                 do_mac = TFC_MAC_SIGN;
 387                                 if (strcasecmp(optarg, "mac") != 0)
 388                                         do_mac_file = optarg;
 389                                 break;
 390                         case 'M':
 391                                 do_mac = TFC_MAC_VRFY;
 392                                 if (!strcasecmp(optarg, "drop"))
 393                                         do_mac = TFC_MAC_DROP;
 394                                 else if (strcasecmp(optarg, "mac") != 0)
 395                                         do_mac_file = optarg;
 396                                 break;
 397                         case 'm':
 398                                 if (do_mac != TFC_MAC_VRFY)
 399                                         xerror(NO, YES, YES, "signature source was not specified");
 400                                 do_mac = TFC_MAC_JUST_VRFY;
 401                                 break;
 402                         case 'R':
 403                         case 'Z':
 404                                 if (maxlen != NOFSIZE) {
 405                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 406                                         else genrandom_nr_bytes = maxlen;
 407                                 }
 408                                 else {
 409                                         tfc_fsize t;
 410                                         if (!strcasecmp(optarg, "cbs"))
 411                                                 t = TF_BLOCK_SIZE;
 412                                         else if (!strcasecmp(optarg, "ks"))
 413                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 414                                         else if (!strcasecmp(optarg, "xks"))
 415                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 416                                         else if (!strcasecmp(optarg, "iobs"))
 417                                                 t = blksize;
 418                                         else {
 419                                                 t = tfc_humanfsize(optarg, &stoi);
 420                                                 if (!str_empty(stoi)) {
 421                                                         t = tfc_fnamesize(optarg, NO);
 422                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 423                                                 }
 424                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 425                                         }
 426                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 427                                         else genrandom_nr_bytes = maxlen = t;
 428                                 }
 429                                 break;
 430                         case 'a':
 431                                 do_preserve_time = YES;
 432                                 break;
 433                         case 'A':
 434                                 do_outfmt = TFC_OUTFMT_B64;
 435                                 break;
 436                         case 'W':
 437                                 do_outfmt = TFC_OUTFMT_RAW;
 438                                 break;
 439                         case 'H':
 440                                 do_outfmt = TFC_OUTFMT_HEX;
 441                                 break;
 442                         case 'q':
 443                                 quiet = YES;
 444                                 verbose = NO;
 445                                 status_timer = 0;
 446                                 break;
 447                         case 'v':
 448                                 verbose = YES;
 449                                 break;
 450                         case 'V':
 451                                 td = strtod(optarg, &stoi);
 452                                 status_timer = TFC_DTOUSECS(td);
 453                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 454                                 break;
 455                         default:
 456                                 usage();
 457                                 break;
 458                 }
 459         }
 460
 461         if (!strcmp(progname, "tfbench")) {
 462                 if (!*(argv+optind)) usage();
 463
 464                 td = strtod(*(argv+optind), &stoi);
 465                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 466                         xerror(NO, YES, YES,
 467                         "%s: invalid benchmark time in seconds", *(argv+optind));
 468                 bench_timer = TFC_DTOUSECS(td);
 469                 do_benchmark(bench_timer, td);
 470         }
 471         if (genrandom_nr_bytes) {
 472                 ctr_mode = TFC_MODE_STREAM;
 473                 do_edcrypt = TFC_DO_ENCRYPT;
 474                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 475         }
 476         if (genzero_nr_bytes) {
 477                 ctr_mode = TFC_MODE_PLAIN;
 478                 do_edcrypt = TFC_DO_PLAIN;
 479                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 480         }
 481
 482         if (rawkey && password)
 483                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 484         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 485                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 486         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 487                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 488         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 489                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 490         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 491                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 492         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 493                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 494         if (tweakf && do_tfcrypt1 == NO)
 495                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 496         if (ctr_mode == TFC_MODE_PLAIN
 497         && (do_edcrypt || do_mac || rawkey
 498         || mackey_opt || counter_opt || counter_file))
 499                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 500
 501         errno = 0;
 502         do_stop = NO;
 503
 504         if (saltf) {
 505                 int saltfd;
 506
 507                 memset(tfc_salt, 0, TFC_MAX_SALT);
 508                 tfc_saltsz = 0;
 509                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 510
 511                 if (!strcmp(saltf, "-")) saltfd = 0;
 512                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 513                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 514                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 515                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 516                 tfc_saltsz = lio;
 517                 xclose(saltfd);
 518         }
 519
 520 _nosalt:
 521         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 522                 int mkfd = -1;
 523                 tfc_yesno do_stop;
 524
 525                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 526                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 527                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 528
 529                 skein_init(&sk, TFC_KEY_BITS);
 530
 531                 do_stop = NO;
 532                 while (1) {
 533                         if (do_stop) break;
 534                         pblk = tmpdata;
 535                         ldone = 0;
 536                         lrem = lblock = sizeof(tmpdata);
 537                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 538 _mkragain:              lio = xread(mkfd, pblk, lrem);
 539                         if (lio == 0) do_stop = YES;
 540                         if (lio != NOSIZE) ldone += lio;
 541                         else {
 542                                 if (errno != EIO && catch_all_errors != YES)
 543                                         xerror(NO, NO, NO, "%s", mackeyf);
 544                                 switch (error_action) {
 545                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 546                                         case TFC_ERRACT_SYNC:
 547                                         case TFC_ERRACT_LSYNC:
 548                                                 xerror(YES, NO, NO, "%s", mackeyf);
 549                                                 lio = ldone = lrem = lblock;
 550                                                 memset(tmpdata, 0, lio);
 551                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 552                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 553                                                 break;
 554                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 555                                 }
 556                         }
 557                         if (lio && lio < lrem) {
 558                                 pblk += lio;
 559                                 lrem -= lio;
 560                                 goto _mkragain;
 561                         }
 562
 563                         skein_update(&sk, tmpdata, ldone);
 564                 }
 565
 566                 skein_final(mackey, &sk);
 567
 568                 xclose(mkfd);
 569         }
 570         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 571                 memset(&getps, 0, sizeof(struct getpasswd_state));
 572                 getps.fd = getps.efd = -1;
 573                 getps.passwd = pwdask;
 574                 getps.pwlen = sizeof(pwdask)-1;
 575                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 576                 getps.charfilter = getps_filter;
 577                 getps.maskchar = 'x';
 578                 getps.flags = GETP_WAITFILL;
 579                 n = xgetpasswd(&getps);
 580                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 581                 if (n == ((size_t)-2)) xexit(1);
 582                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 583                 if (verbose) {
 584                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 585                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 586                         tfc_nfsay(stderr, "MAC password hint: ");
 587                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 588                         memset(tmpdata, 0, sizeof(tmpdata));
 589                 }
 590         }
 591
 592
 593         if ((strlen(progname) <= 9)
 594         && ((!strcmp(progname, "sksum"))
 595         || ((!memcmp(progname, "sk", 2))
 596         && (!memcmp(progname+3, "sum", 3)
 597         || !memcmp(progname+4, "sum", 3)
 598         || !memcmp(progname+5, "sum", 3)
 599         || !memcmp(progname+6, "sum", 3)))))
 600                 do_sksum(progname, argv+optind);
 601         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 602
 603         idx = optind;
 604
 605         if (argv[idx]) {
 606                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 607                 if (!strcmp(argv[idx], "-")) kfd = 0;
 608                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 609                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 610
 611                 lio = strnlen(argv[idx], PATH_MAX);
 612                 memset(argv[idx], '*', lio);
 613
 614                 idx++;
 615         }
 616         else password = YES;
 617
 618         errno = 0;
 619         if (do_tfcrypt1 == YES && tweakf) {
 620                 int twfd;
 621
 622                 if (!strcmp(tweakf, "-")) twfd = 0;
 623                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 624                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 625                 lio = ldone = xread(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 626                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 627                 if (ldone < 2*TF_SIZE_UNIT)
 628                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 629                 xclose(twfd);
 630         }
 631
 632 _nokeyfd:
 633         errno = 0;
 634         if (argv[idx]) {
 635                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 636                 else {
 637                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 638                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 639                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 640                 }
 641                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 642
 643                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 644                         if (verbose) tfc_esay("%s: disabling signature verification on "
 645                                 "requested partial decryption.", progname);
 646                         do_mac = NO;
 647                 }
 648
 649                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 650                         maxlen = tfc_fdsize(sfd);
 651                         if (maxlen == NOFSIZE)
 652                                 xerror(NO, YES, YES,
 653                                 "Cannot verify embedded MAC with non-seekable source!");
 654                         maxlen -= TF_FROM_BITS(macbits);
 655                 }
 656                 srcfname = argv[idx];
 657                 idx++;
 658         }
 659
 660         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 661                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 662
 663         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 664         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 665
 666         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 667         errno = 0;
 668         if (counter_file) {
 669                 int ctrfd;
 670
 671                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 672                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 673                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 674                 lio = xread(ctrfd, ctr, ctrsz);
 675                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 676                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 677                 xclose(ctrfd);
 678         }
 679         else if (counter_opt == TFC_CTR_HEAD) {
 680                 pblk = ctr;
 681                 ldone = 0;
 682                 lrem = lblock = ctrsz;
 683                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 684 _ctrragain:     lio = xread(sfd, pblk, lrem);
 685                 if (lio != NOSIZE) ldone += lio;
 686                 else {
 687                         if (errno != EIO && catch_all_errors != YES)
 688                                 xerror(NO, NO, NO, "%s", srcfname);
 689                         switch (error_action) {
 690                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 691                                 case TFC_ERRACT_SYNC:
 692                                 case TFC_ERRACT_LSYNC:
 693                                         xerror(YES, NO, NO, "%s", srcfname);
 694                                         lio = ldone = lrem = lblock;
 695                                         memset(ctr, 0, lio);
 696                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 697                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 698                                         break;
 699                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 700                         }
 701                 }
 702                 if (lio && lio < lrem) {
 703                         pblk += lio;
 704                         lrem -= lio;
 705                         goto _ctrragain;
 706                 }
 707                 total_processed_src += ldone;
 708         }
 709
 710 _ctrskip1:
 711         if (iseek) {
 712                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 713                         iseek += ctrsz;
 714                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 715                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 716         }
 717
 718         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 719
 720         if (verbose) tfc_esay("%s: hashing password", progname);
 721
 722         if (rawkey == TFC_RAWKEY_KEYFILE) {
 723                 tfc_yesno xtskeyset = NO;
 724
 725                 pblk = key;
 726 _xts2key:       ldone = 0;
 727                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 728                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 729 _keyragain:     lio = xread(kfd, pblk, lrem);
 730                 if (lio != NOSIZE) ldone += lio;
 731                 else {
 732                         if (errno != EIO && catch_all_errors != YES)
 733                                 xerror(NO, NO, NO, "reading key");
 734                         switch (error_action) {
 735                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 736                                 case TFC_ERRACT_SYNC:
 737                                 case TFC_ERRACT_LSYNC:
 738                                         xerror(YES, NO, NO, "reading key");
 739                                         lio = ldone = lrem = lblock;
 740                                         memset(key, 0, lio);
 741                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 742                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 743                                         break;
 744                                 default: xerror(NO, NO, NO, "reading key"); break;
 745                         }
 746                 }
 747                 if (lio && lio < lrem) {
 748                         pblk += lio;
 749                         lrem -= lio;
 750                         goto _keyragain;
 751                 }
 752                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 753
 754                 if (ctr_mode == TFC_MODE_XTS) {
 755                         if (xtskeyset == NO) {
 756                                 pblk = xtskey;
 757                                 xtskeyset = YES;
 758                                 goto _xts2key;
 759                         }
 760                 }
 761         }
 762         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 763                 tfc_yesno xtskeyset = NO;
 764
 765                 pblk = key; n = sizeof(key);
 766 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 767                 getps.fd = getps.efd = -1;
 768                 getps.passwd = (char *)pblk;
 769                 getps.pwlen = n;
 770                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 771                 getps.charfilter = getps_filter;
 772                 getps.maskchar = 'x';
 773                 getps.flags = GETP_WAITFILL;
 774                 n = xgetpasswd(&getps);
 775                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 776                 if (n == ((size_t)-2)) xexit(1);
 777                 if (ctr_mode == TFC_MODE_XTS) {
 778                         if (xtskeyset == NO) {
 779                                 pblk = xtskey; n = sizeof(xtskey);
 780                                 xtskeyset = YES;
 781                                 goto _xts2keyaskstr;
 782                         }
 783                 }
 784         }
 785         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 786                 tfc_yesno xtskeyset = NO;
 787
 788                 pblk = key;
 789 _rawkey_hex_again:
 790                 memset(&getps, 0, sizeof(struct getpasswd_state));
 791                 getps.fd = getps.efd = -1;
 792                 getps.passwd = pwdask;
 793                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 794                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 795                 getps.charfilter = getps_hex_filter;
 796                 getps.maskchar = 'x';
 797                 getps.flags = GETP_WAITFILL;
 798                 n = xgetpasswd(&getps);
 799                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 800                 if (n == ((size_t)-2)) xexit(1);
 801                 if (n % 2) {
 802                         tfc_esay("Please input even number of hex digits!");
 803                         goto _rawkey_hex_again;
 804                 }
 805                 hex2bin(pblk, pwdask);
 806                 memset(pwdask, 0, sizeof(pwdask));
 807                 if (ctr_mode == TFC_MODE_XTS) {
 808                         if (xtskeyset == NO) {
 809                                 pblk = xtskey;
 810                                 xtskeyset = YES;
 811                                 goto _rawkey_hex_again;
 812                         }
 813                 }
 814         }
 815         else if (password) {
 816 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 817                 getps.fd = getps.efd = -1;
 818                 getps.passwd = pwdask;
 819                 getps.pwlen = sizeof(pwdask)-1;
 820                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 821                 getps.charfilter = getps_filter;
 822                 getps.maskchar = 'x';
 823                 getps.flags = GETP_WAITFILL;
 824                 n = xgetpasswd(&getps);
 825                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 826                 if (n == ((size_t)-2)) xexit(1);
 827                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 828                         getps.fd = getps.efd = -1;
 829                         getps.passwd = pwdagain;
 830                         getps.pwlen = sizeof(pwdagain)-1;
 831                         getps.echo = "Enter it again: ";
 832                         getps.flags = GETP_WAITFILL;
 833                         n = xgetpasswd(&getps);
 834                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 835                         if (n == ((size_t)-2)) xexit(1);
 836                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 837                                 tfc_esay("Passwords are different, try again");
 838                                 goto _pwdagain;
 839                         }
 840                 }
 841                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 842                 memset(pwdask, 0, sizeof(pwdask));
 843                 memset(pwdagain, 0, sizeof(pwdagain));
 844         }
 845         else {
 846                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 847                         xerror(NO, NO, YES, "hashing key");
 848         }
 849
 850         if (rawkey == NO) {
 851                 if (tfc_saltsz > 0) {
 852                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 853                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 854                 }
 855                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 856                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 857                 memset(tfc_salt, 0, TFC_MAX_SALT);
 858         }
 859
 860         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 861                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 862         }
 863
 864         if (genkeyf) {
 865                 int krfd;
 866                 tfc_yesno xtskeyset = NO;
 867
 868                 pblk = key;
 869                 if (!strcmp(genkeyf, "-")) krfd = 1;
 870                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 871                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 872 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 873                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 874                 if (verbose && xtskeyset == NO) {
 875                         tfc_esay("%s: password hashing done", progname);
 876                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 877                         tfc_esay("%s: Have a nice day!", progname);
 878                 }
 879
 880                 if (ctr_mode == TFC_MODE_XTS) {
 881                         if (xtskeyset == NO) {
 882                                 pblk = xtskey;
 883                                 xtskeyset = YES;
 884                                 goto _xts2genkey;
 885                         }
 886                 }
 887
 888                 fchmod(krfd, 0600);
 889                 xclose(krfd);
 890                 xexit(0);
 891         }
 892
 893         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 894                 if (verbose) tfc_esay("%s: disabling signature verification on "
 895                         "requested partial decryption.", progname);
 896                 do_mac = NO;
 897         }
 898
 899         if (do_mac != NO) {
 900                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 901                 if (ctr_mode < TFC_MODE_OCB) {
 902                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 903                                 "will be slower.", progname);
 904                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 905                         else skein_init(&sk, macbits);
 906                 }
 907         }
 908
 909         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 910                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 911         }
 912
 913         tf_convkey(key);
 914         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 915         if (do_tfcrypt1 == YES) {
 916                 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));
 917                 tf_key_tweak_compat(key);
 918         }
 919         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 920         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 921         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 922
 923         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 924
 925         switch (counter_opt) {
 926                 case TFC_CTR_SHOW:
 927                         switch (do_outfmt) {
 928                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 929                                 case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
 930                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 931                         }
 932                         break;
 933                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 934         }
 935
 936 _ctrskip2:
 937         if (kfd != -1) {
 938                 xclose(kfd);
 939                 kfd = -1;
 940         }
 941         if (verbose) tfc_esay("%s: password hashing done", progname);
 942
 943         if (overwrite_source && srcfname) argv[idx] = srcfname;
 944
 945 _plain:
 946         if (argv[idx]) {
 947                 if (!strcmp(argv[idx], "-")) dfd = 1;
 948                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 949                 if (dfd == -1) {
 950                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 951                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 952                 }
 953                 dstfname = argv[idx];
 954                 idx++;
 955         }
 956
 957         if (oseek) {
 958                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 959                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
 960         }
 961
 962         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 963         memset(&sigact, 0, sizeof(sigact));
 964         sigact.sa_flags = SA_RESTART;
 965         sigact.sa_handler = print_crypt_status;
 966         sigaction(SIGUSR1, &sigact, NULL);
 967         sigaction(SIGTSTP, &sigact, NULL);
 968         sigaction(SIGALRM, &sigact, NULL);
 969         if (status_timer) setup_next_alarm(status_timer);
 970         sigact.sa_handler = change_status_width;
 971         sigaction(SIGQUIT, &sigact, NULL);
 972         sigact.sa_handler = change_status_timer;
 973         sigaction(SIGUSR2, &sigact, NULL);
 974         if (quiet == NO) {
 975                 sigact.sa_handler = print_crypt_status;
 976                 sigaction(SIGINT, &sigact, NULL);
 977                 sigaction(SIGTERM, &sigact, NULL);
 978         }
 979         else {
 980                 sigact.sa_handler = exit_sigterm;
 981                 sigaction(SIGINT, &sigact, NULL);
 982                 sigaction(SIGTERM, &sigact, NULL);
 983         }
 984         memset(&sigact, 0, sizeof(struct sigaction));
 985
 986         tfc_getcurtime(&delta_time);
 987
 988         errno = 0;
 989         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 990                 pblk = ctr;
 991                 lio = lrem = ctrsz;
 992                 ldone = 0;
 993 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
 994                 if (lio != NOSIZE) ldone += lio;
 995                 else xerror(NO, NO, NO, "%s", dstfname);
 996                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 997                 if (lio < lrem) {
 998                         pblk += lio;
 999                         lrem -= lio;
1000                         goto _ctrwagain;
1001                 }
1002                 total_processed_dst += ldone;
1003                 delta_processed += ldone;
1004         }
1005
1006         errno = 0;
1007         do_stop = NO;
1008         while (1) {
1009                 if (do_stop) break;
1010                 pblk = srcblk;
1011                 ldone = 0;
1012                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1013                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1014 _ragain:        lio = xread(sfd, pblk, lrem);
1015                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
1016                 if (lio != NOSIZE) ldone += lio;
1017                 else {
1018                         if (errno != EIO && catch_all_errors != YES)
1019                                 xerror(NO, NO, NO, "%s", srcfname);
1020                         switch (error_action) {
1021                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1022                                 case TFC_ERRACT_SYNC:
1023                                 case TFC_ERRACT_LSYNC:
1024                                         xerror(YES, NO, NO, "%s", srcfname);
1025                                         lio = ldone = lrem = lblock;
1026                                         memset(srcblk, 0, lio);
1027                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1028                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1029                                         break;
1030                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1031                         }
1032                 }
1033                 if (lio && lio < lrem) {
1034                         pblk += lio;
1035                         lrem -= lio;
1036                         goto _ragain;
1037                 }
1038                 total_processed_src += ldone;
1039
1040                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1041                         size_t orig = ldone;
1042                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1043                         if (ldone > blksize) ldone = blksize;
1044                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1045                 }
1046
1047                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1048                         skein_update(&sk, srcblk, ldone);
1049
1050                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1051                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1052                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1053                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1054                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1055                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1056                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1057                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1058                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1059                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1060                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1061                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1062                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1063                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1064
1065                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1066                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1067                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1068                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1069
1070                 else if (ctr_mode == TFC_MODE_PLAIN)
1071                         memcpy(dstblk, srcblk, ldone);
1072
1073                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1074                         skein_update(&sk, dstblk, ldone);
1075                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1076
1077                 pblk = dstblk;
1078                 lrem = ldone;
1079                 ldone = 0;
1080 _wagain:        lio = xwrite(dfd, pblk, lrem);
1081                 if (lio != NOSIZE) ldone += lio;
1082                 else xerror(NO, NO, NO, "%s", dstfname);
1083                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1084                 if (lio < lrem) {
1085                         pblk += lio;
1086                         lrem -= lio;
1087                         goto _wagain;
1088                 }
1089 _nowrite:       total_processed_dst += ldone;
1090                 delta_processed += ldone;
1091
1092                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1093         }
1094
1095         if (do_stop == TFC_STOP_FULL) goto _nomac;
1096
1097         errno = 0;
1098         if (do_mac >= TFC_MAC_VRFY) {
1099                 if (!do_mac_file) {
1100                         pblk = macvrfy;
1101                         ldone = 0;
1102                         lrem = lblock = TF_FROM_BITS(macbits);
1103                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1104 _macragain:             lio = xread(sfd, pblk, lrem);
1105                         if (lio != NOSIZE) ldone += lio;
1106                         else {
1107                                 if (errno != EIO && catch_all_errors != YES)
1108                                         xerror(NO, NO, NO, "%s", srcfname);
1109                                 switch (error_action) {
1110                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1111                                         case TFC_ERRACT_SYNC:
1112                                         case TFC_ERRACT_LSYNC:
1113                                                 xerror(YES, NO, NO, "%s", srcfname);
1114                                                 lio = ldone = lrem = lblock;
1115                                                 memset(macvrfy, 0, lio);
1116                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1117                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1118                                                 break;
1119                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1120                                 }
1121                         }
1122                         if (lio && lio < lrem) {
1123                                 pblk += lio;
1124                                 lrem -= lio;
1125                                 goto _macragain;
1126                         }
1127                         total_processed_src += ldone;
1128                 }
1129                 else {
1130                         int mfd;
1131
1132                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1133                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1134                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1135                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1136                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1137                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1138                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1139                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1140                                 lio = TF_FROM_BITS(macbits);
1141                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1142                         }
1143                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1144                         xclose(mfd);
1145                 }
1146
1147                 if (ldone < TF_FROM_BITS(macbits)) {
1148                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1149                                 "not verifying", progname, ldone);
1150                         exitcode = 1;
1151                         goto _shortmac;
1152                 }
1153
1154                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1155                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1156
1157                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1158                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1159                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1160                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1161                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1162                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1163
1164                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1165                         if (quiet == NO) {
1166                                 tfc_esay("%s: signature is good", progname);
1167                                 if (verbose) {
1168                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1169                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1170                                 }
1171                         }
1172                 }
1173                 else {
1174                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1175                                 "wrong password, key, mode, or file is not signed", progname);
1176                         exitcode = 1;
1177                 }
1178
1179 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1180                 memset(macresult, 0, sizeof(macresult));
1181                 memset(tmpdata, 0, sizeof(tmpdata));
1182         }
1183
1184         else if (do_mac == TFC_MAC_SIGN) {
1185                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1186                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1187
1188                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1189                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1190                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1191                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1192                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1193                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1194                 memset(macresult, 0, sizeof(macresult));
1195
1196                 if (!do_mac_file) {
1197                         pblk = tmpdata;
1198                         lio = lrem = TF_FROM_BITS(macbits);
1199                         ldone = 0;
1200 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1201                         if (lio != NOSIZE) ldone += lio;
1202                         else xerror(NO, NO, NO, "%s", dstfname);
1203                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1204                         if (lio < lrem) {
1205                                 pblk += lio;
1206                                 lrem -= lio;
1207                                 goto _macwagain;
1208                         }
1209                         total_processed_dst += ldone;
1210                         delta_processed += ldone;
1211                 }
1212                 else {
1213                         int mfd;
1214
1215                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1216                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1217                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1218                         if (do_outfmt == TFC_OUTFMT_B64) {
1219                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1220                                 memset(tmpdata, 0, TFC_TMPSIZE);
1221                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1222                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1223                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1224                                 if (lrem) {
1225                                         tmpdata[lrem] = '\n';
1226                                         lrem++;
1227                                 }
1228                                 lio = xwrite(mfd, tmpdata, lrem);
1229                         }
1230                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1231                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1232                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1233                         xclose(mfd);
1234                 }
1235
1236                 memset(macvrfy, 0, sizeof(macvrfy));
1237                 memset(macresult, 0, sizeof(macresult));
1238                 memset(tmpdata, 0, sizeof(tmpdata));
1239         }
1240
1241 _nomac:
1242         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1243
1244         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1245         xclose(sfd);
1246         xclose(dfd);
1247
1248         xexit(exitcode);
1249         return -1;
1250 }