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 if (!strcasecmp(optarg, "zero"))
  95                                         counter_opt = TFC_CTR_ZERO;
  96                                 else counter_file = sksum_hashlist_file = optarg;
  97                                 break;
  98                         case 'C':
  99                                 if (!strcasecmp(optarg, "ctr"))
 100                                         ctr_mode = TFC_MODE_CTR;
 101                                 else if (!strcasecmp(optarg, "stream"))
 102                                         ctr_mode = TFC_MODE_STREAM;
 103                                 else if (!strcasecmp(optarg, "cbc"))
 104                                         ctr_mode = TFC_MODE_CBC;
 105                                 else if (!strcasecmp(optarg, "ecb"))
 106                                         ctr_mode = TFC_MODE_ECB;
 107                                 else if (!strcasecmp(optarg, "xts"))
 108                                         ctr_mode = TFC_MODE_XTS;
 109                                 else if (!strcasecmp(optarg, "ocb"))
 110                                         ctr_mode = TFC_MODE_OCB;
 111                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
 112                                 break;
 113                         case 'P':
 114                                 do_edcrypt = TFC_DO_PLAIN;
 115                                 password = YES;
 116                                 ctr_mode = TFC_MODE_PLAIN;
 117                                 break;
 118                         case 'e':
 119                                 do_edcrypt = TFC_DO_ENCRYPT;
 120                                 break;
 121                         case 'd':
 122                                 do_edcrypt = TFC_DO_DECRYPT;
 123                                 break;
 124                         case 'D':
 125                                 macbits = strtoul(optarg, &stoi, 10);
 126                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 127                                 || macbits > TF_MAX_BITS || macbits % 8)
 128                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 129                                 break;
 130                         case 'n':
 131                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 132                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 133                                 break;
 134                         case 'U':
 135                                 if (!strcasecmp(optarg, "key"))
 136                                         mackey_opt = TFC_MACKEY_RAWKEY;
 137                                 else if (!strcasecmp(optarg, "pwd"))
 138                                         mackey_opt = TFC_MACKEY_PASSWORD;
 139                                 else {
 140                                         mackey_opt = TFC_MACKEY_FILE;
 141                                         mackeyf = optarg;
 142                                 }
 143                                 break;
 144                         case 'p':
 145                                 password = YES;
 146                                 break;
 147                         case 'k':
 148                                 rawkey = TFC_RAWKEY_KEYFILE;
 149                                 break;
 150                         case 'z':
 151                                 rawkey = TFC_RAWKEY_ASKSTR;
 152                                 break;
 153                         case 'x':
 154                                 rawkey = TFC_RAWKEY_ASKHEX;
 155                                 break;
 156                         case 'K':
 157                                 verbose = YES;
 158                                 genkeyf = optarg;
 159                                 break;
 160                         case 't':
 161                                 tweakf = optarg;
 162                                 break;
 163                         case 'T':
 164                                 tfc_saltsz = 0;
 165                                 do_tfcrypt1 = YES;
 166                                 break;
 167                         case 'l':
 168                                 if (maxlen != NOFSIZE) break;
 169
 170                                 maxlen = tfc_humanfsize(optarg, &stoi);
 171                                 if (!str_empty(stoi)) {
 172                                         maxlen = tfc_fnamesize(optarg, YES);
 173                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 174                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 175                                         "%s: invalid count value", optarg);
 176                                 }
 177                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 178                                 if (counter_opt == TFC_CTR_HEAD)
 179                                         maxlen += TF_BLOCK_SIZE;
 180                                 break;
 181                         case 'w':
 182                                 overwrite_source = YES;
 183                                 break;
 184                         case 'E':
 185                                 if (!strcmp(optarg, "xall")) {
 186                                         catch_all_errors = YES;
 187                                         break;
 188                                 }
 189                                 if (!strcmp(optarg, "xseek")) {
 190                                         ignore_seek_errors = YES;
 191                                         break;
 192                                 }
 193                                 if (!strcmp(optarg, "exit"))
 194                                         error_action = TFC_ERRACT_EXIT;
 195                                 else if (!strncmp(optarg, "cont", 4))
 196                                         error_action = TFC_ERRACT_CONT;
 197                                 else if (!strcmp(optarg, "sync"))
 198                                         error_action = TFC_ERRACT_SYNC;
 199                                 else if (!strcmp(optarg, "lsync"))
 200                                         error_action = TFC_ERRACT_LSYNC;
 201                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 202                                 break;
 203                         case 'O':
 204                                 s = d = optarg; t = NULL;
 205                                 while ((s = strtok_r(d, ",", &t))) {
 206                                         if (d) d = NULL;
 207                                         if (!strcmp(s, "sync"))
 208                                                 write_flags |= O_SYNC;
 209                                         else if (!strcmp(s, "trunc"))
 210                                                 write_flags |= O_TRUNC;
 211                                         else if (!strcmp(s, "fsync"))
 212                                                 do_fsync = YES;
 213                                         else if (!strcmp(s, "pad"))
 214                                                 do_pad = YES;
 215                                         else if (!strcmp(s, "xtime"))
 216                                                 do_preserve_time = YES;
 217                                         else if (!strcmp(s, "gibsize"))
 218                                                 do_stats_in_gibs = YES;
 219                                         else if (!strcmp(s, "plainstats"))
 220                                                 do_statline_dynamic = NO;
 221                                         else if (!strcmp(s, "statless"))
 222                                                 do_less_stats = YES;
 223                                         else if (!strcmp(s, "norepeat"))
 224                                                 no_repeat = YES;
 225                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 226                                                 pw_prompt = s+7;
 227                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 228                                                 mac_pw_prompt = s+10;
 229                                         else if (!strcmp(s, "shorthex"))
 230                                                 do_full_hexdump = NO;
 231                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 232                                                 s += 5;
 233                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 234                                                 if (!str_empty(stoi)) {
 235                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 236                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 237                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 238                                                         "%s: invalid block size value", s);
 239                                                 }
 240                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 241                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 242                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 243                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 244                                                         "%s: block size exceeds %u bytes",
 245                                                         s, TFC_U(TFC_BLKSIZE));
 246                                         }
 247                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 248                                                 s += 10;
 249                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 250                                                 if (!str_empty(stoi)) {
 251                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 252                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 253                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 254                                                         "%s: invalid blocks per xts block value", s);
 255                                                 }
 256                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 257                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 258                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 259                                                         s, TFC_U(TFC_BLKSIZE));
 260                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 261                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 262                                                         s, TFC_U(TFC_BLKSIZE));
 263                                         }
 264                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 265                                                 s += 6;
 266                                                 iseek = tfc_humanfsize(s, &stoi);
 267                                                 if (!str_empty(stoi)) {
 268                                                         iseek = tfc_fnamesize(s, YES);
 269                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 270                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 271                                                         "%s: invalid iseek value", s);
 272                                                 }
 273                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 274                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 275                                                         xerror(NO, YES, YES,
 276                                                                 "%s: not round to TF block size "
 277                                                                 "of %u bytes",
 278                                                                 s, TFC_U(TF_BLOCK_SIZE));
 279                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 280                                         }
 281                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 282                                                 s += 7;
 283                                                 iseek = tfc_humanfsize(s, &stoi);
 284                                                 if (!str_empty(stoi)) {
 285                                                         iseek = tfc_fnamesize(s, YES);
 286                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 287                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 288                                                                 "%s: invalid ixseek value", s);
 289                                                 }
 290                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 291                                         }
 292                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 293                                                 s += 5;
 294                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 295                                                 if (!str_empty(stoi)) {
 296                                                         iseek_blocks = tfc_fnamesize(s, YES);
 297                                                         if (iseek_blocks == NOFSIZE)
 298                                                                 xerror(NO, YES, YES,
 299                                                                 "%s: invalid ictr value", s);
 300                                                         iseek_blocks /= TF_BLOCK_SIZE;
 301                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 302                                                 }
 303                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 304                                         }
 305                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 306                                                 s += 6;
 307                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 308                                                 if (!str_empty(stoi)) {
 309                                                         iseek_blocks = tfc_fnamesize(s, YES);
 310                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 311                                                         if (iseek_blocks == NOFSIZE)
 312                                                                 xerror(NO, YES, YES,
 313                                                                 "%s: invalid ixctr value", s);
 314                                                 }
 315                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 316                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 317                                                         xerror(NO, YES, YES,
 318                                                         "%s: not round to TF block size "
 319                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 320                                                 iseek_blocks /= TF_BLOCK_SIZE;
 321                                         }
 322                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 323                                                 s += 6;
 324                                                 oseek = tfc_humanfsize(s, &stoi);
 325                                                 if (!str_empty(stoi)) {
 326                                                         oseek = tfc_fnamesize(s, YES);
 327                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 328                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 329                                                         "%s: invalid oseek value", s);
 330                                                 }
 331                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 332                                         }
 333                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 334                                                 s += 6;
 335                                                 maxlen = tfc_humanfsize(s, &stoi);
 336                                                 if (!str_empty(stoi)) {
 337                                                         maxlen = tfc_fnamesize(s, YES);
 338                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 339                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 340                                                         "%s: invalid count value", s);
 341                                                 }
 342                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 343                                                 if (counter_opt == TFC_CTR_HEAD)
 344                                                         maxlen += TF_BLOCK_SIZE;
 345                                         }
 346                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 347                                                 s += 5;
 348                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 349                                                 if (!str_empty(stoi)) {
 350                                                         maxkeylen = tfc_fnamesize(s, YES);
 351                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 352                                                         if (maxkeylen == NOSIZE)
 353                                                                 xerror(NO, YES, YES,
 354                                                                 "%s: invalid key length value", s);
 355                                                 }
 356                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 357                                         }
 358                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 359                                                 s += 5;
 360                                                 keyoffset = tfc_humanfsize(s, &stoi);
 361                                                 if (!str_empty(stoi)) {
 362                                                         keyoffset = tfc_fnamesize(s, YES);
 363                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 364                                                         if (keyoffset == NOFSIZE)
 365                                                                 xerror(NO, YES, YES,
 366                                                                 "%s: invalid key offset value", s);
 367                                                 }
 368                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 369                                         }
 370                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 371                                                 s += 5;
 372                                                 ctrsz = tfc_humanfsize(s, &stoi);
 373                                                 if (!str_empty(stoi)) {
 374                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 375                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 376                                                         if (ctrsz == NOSIZE)
 377                                                                 xerror(NO, YES, YES,
 378                                                                 "%s: invalid counter length value", s);
 379                                                 }
 380                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 381                                                 if (ctrsz > TF_BLOCK_SIZE)
 382                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 383                                         }
 384                                         else xerror(NO, YES, YES, "invalid option %s", s);
 385                                 }
 386                                 break;
 387                         case 'S':
 388                                 do_mac = TFC_MAC_SIGN;
 389                                 if (strcasecmp(optarg, "mac") != 0)
 390                                         do_mac_file = optarg;
 391                                 break;
 392                         case 'M':
 393                                 do_mac = TFC_MAC_VRFY;
 394                                 if (!strcasecmp(optarg, "drop"))
 395                                         do_mac = TFC_MAC_DROP;
 396                                 else if (strcasecmp(optarg, "mac") != 0)
 397                                         do_mac_file = optarg;
 398                                 break;
 399                         case 'm':
 400                                 if (do_mac != TFC_MAC_VRFY)
 401                                         xerror(NO, YES, YES, "signature source was not specified");
 402                                 do_mac = TFC_MAC_JUST_VRFY;
 403                                 break;
 404                         case 'R':
 405                         case 'Z':
 406                                 if (maxlen != NOFSIZE) {
 407                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 408                                         else genrandom_nr_bytes = maxlen;
 409                                 }
 410                                 else {
 411                                         tfc_fsize t;
 412                                         if (!strcasecmp(optarg, "cbs"))
 413                                                 t = TF_BLOCK_SIZE;
 414                                         else if (!strcasecmp(optarg, "ks"))
 415                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 416                                         else if (!strcasecmp(optarg, "xks"))
 417                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 418                                         else if (!strcasecmp(optarg, "iobs"))
 419                                                 t = blksize;
 420                                         else {
 421                                                 t = tfc_humanfsize(optarg, &stoi);
 422                                                 if (!str_empty(stoi)) {
 423                                                         t = tfc_fnamesize(optarg, NO);
 424                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 425                                                 }
 426                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 427                                         }
 428                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 429                                         else genrandom_nr_bytes = maxlen = t;
 430                                 }
 431                                 break;
 432                         case 'a':
 433                                 do_preserve_time = YES;
 434                                 break;
 435                         case 'A':
 436                                 do_outfmt = TFC_OUTFMT_B64;
 437                                 break;
 438                         case 'W':
 439                                 do_outfmt = TFC_OUTFMT_RAW;
 440                                 break;
 441                         case 'H':
 442                                 do_outfmt = TFC_OUTFMT_HEX;
 443                                 break;
 444                         case 'q':
 445                                 quiet = YES;
 446                                 verbose = NO;
 447                                 status_timer = 0;
 448                                 break;
 449                         case 'v':
 450                                 verbose = YES;
 451                                 break;
 452                         case 'V':
 453                                 td = strtod(optarg, &stoi);
 454                                 status_timer = TFC_DTOUSECS(td);
 455                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 456                                 break;
 457                         default:
 458                                 usage();
 459                                 break;
 460                 }
 461         }
 462
 463         if (!strcmp(progname, "tfbench")) {
 464                 if (!*(argv+optind)) usage();
 465
 466                 td = strtod(*(argv+optind), &stoi);
 467                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 468                         xerror(NO, YES, YES,
 469                         "%s: invalid benchmark time in seconds", *(argv+optind));
 470                 bench_timer = TFC_DTOUSECS(td);
 471                 do_benchmark(bench_timer, td);
 472         }
 473         if (genrandom_nr_bytes) {
 474                 ctr_mode = TFC_MODE_STREAM;
 475                 do_edcrypt = TFC_DO_ENCRYPT;
 476                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 477         }
 478         if (genzero_nr_bytes) {
 479                 ctr_mode = TFC_MODE_PLAIN;
 480                 do_edcrypt = TFC_DO_PLAIN;
 481                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 482         }
 483
 484         if (rawkey && password)
 485                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 486         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 487                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 488         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 489                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 490         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 491                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 492         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 493                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 494         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 495                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 496         if (tweakf && do_tfcrypt1 == NO)
 497                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 498         if (ctr_mode == TFC_MODE_PLAIN
 499         && (do_edcrypt || do_mac || rawkey
 500         || mackey_opt || counter_opt || counter_file))
 501                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 502
 503         errno = 0;
 504         do_stop = NO;
 505
 506         if (saltf) {
 507                 int saltfd;
 508
 509                 memset(tfc_salt, 0, TFC_MAX_SALT);
 510                 tfc_saltsz = 0;
 511                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 512
 513                 if (!strcmp(saltf, "-")) saltfd = 0;
 514                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 515                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 516                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 517                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 518                 tfc_saltsz = lio;
 519                 xclose(saltfd);
 520         }
 521
 522 _nosalt:
 523         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 524                 int mkfd = -1;
 525                 tfc_yesno do_stop;
 526
 527                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 528                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 529                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 530
 531                 skein_init(&sk, TFC_KEY_BITS);
 532
 533                 do_stop = NO;
 534                 while (1) {
 535                         if (do_stop) break;
 536                         pblk = tmpdata;
 537                         ldone = 0;
 538                         lrem = lblock = sizeof(tmpdata);
 539                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 540 _mkragain:              lio = xread(mkfd, pblk, lrem);
 541                         if (lio == 0) do_stop = YES;
 542                         if (lio != NOSIZE) ldone += lio;
 543                         else {
 544                                 if (errno != EIO && catch_all_errors != YES)
 545                                         xerror(NO, NO, NO, "%s", mackeyf);
 546                                 switch (error_action) {
 547                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 548                                         case TFC_ERRACT_SYNC:
 549                                         case TFC_ERRACT_LSYNC:
 550                                                 xerror(YES, NO, NO, "%s", mackeyf);
 551                                                 lio = ldone = lrem = lblock;
 552                                                 memset(tmpdata, 0, lio);
 553                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 554                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 555                                                 break;
 556                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 557                                 }
 558                         }
 559                         if (lio && lio < lrem) {
 560                                 pblk += lio;
 561                                 lrem -= lio;
 562                                 goto _mkragain;
 563                         }
 564
 565                         skein_update(&sk, tmpdata, ldone);
 566                 }
 567
 568                 skein_final(mackey, &sk);
 569
 570                 xclose(mkfd);
 571         }
 572         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 573                 memset(&getps, 0, sizeof(struct getpasswd_state));
 574                 getps.fd = getps.efd = -1;
 575                 getps.passwd = pwdask;
 576                 getps.pwlen = sizeof(pwdask)-1;
 577                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 578                 getps.charfilter = getps_filter;
 579                 getps.maskchar = 'x';
 580                 getps.flags = GETP_WAITFILL;
 581                 n = xgetpasswd(&getps);
 582                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 583                 if (n == ((size_t)-2)) xexit(1);
 584                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 585                 if (verbose) {
 586                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 587                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 588                         tfc_nfsay(stderr, "MAC password hint: ");
 589                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 590                         memset(tmpdata, 0, sizeof(tmpdata));
 591                 }
 592         }
 593
 594
 595         if ((strlen(progname) <= 9)
 596         && ((!strcmp(progname, "sksum"))
 597         || ((!memcmp(progname, "sk", 2))
 598         && (!memcmp(progname+3, "sum", 3)
 599         || !memcmp(progname+4, "sum", 3)
 600         || !memcmp(progname+5, "sum", 3)
 601         || !memcmp(progname+6, "sum", 3)))))
 602                 do_sksum(progname, argv+optind);
 603         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 604
 605         idx = optind;
 606
 607         if (argv[idx]) {
 608                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 609                 if (!strcmp(argv[idx], "-")) kfd = 0;
 610                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 611                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 612
 613                 lio = strnlen(argv[idx], PATH_MAX);
 614                 memset(argv[idx], '*', lio);
 615
 616                 idx++;
 617         }
 618         else password = YES;
 619
 620         errno = 0;
 621         if (do_tfcrypt1 == YES && tweakf) {
 622                 int twfd;
 623
 624                 if (!strcmp(tweakf, "-")) twfd = 0;
 625                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 626                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 627                 lio = ldone = xread(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 628                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 629                 if (ldone < 2*TF_SIZE_UNIT)
 630                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 631                 xclose(twfd);
 632         }
 633
 634 _nokeyfd:
 635         errno = 0;
 636         if (argv[idx]) {
 637                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 638                 else {
 639                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 640                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 641                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 642                 }
 643                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 644
 645                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 646                         if (verbose) tfc_esay("%s: disabling signature verification on "
 647                                 "requested partial decryption.", progname);
 648                         do_mac = NO;
 649                 }
 650
 651                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 652                         maxlen = tfc_fdsize(sfd);
 653                         if (maxlen == NOFSIZE)
 654                                 xerror(NO, YES, YES,
 655                                 "Cannot verify embedded MAC with non-seekable source!");
 656                         maxlen -= TF_FROM_BITS(macbits);
 657                 }
 658                 srcfname = argv[idx];
 659                 idx++;
 660         }
 661
 662         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 663                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 664
 665         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 666         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 667
 668         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 669         errno = 0;
 670         if (counter_file) {
 671                 int ctrfd;
 672
 673                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 674                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 675                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 676                 lio = xread(ctrfd, ctr, ctrsz);
 677                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 678                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 679                 xclose(ctrfd);
 680         }
 681         else if (counter_opt == TFC_CTR_HEAD) {
 682                 pblk = ctr;
 683                 ldone = 0;
 684                 lrem = lblock = ctrsz;
 685                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 686 _ctrragain:     lio = xread(sfd, pblk, lrem);
 687                 if (lio != NOSIZE) ldone += lio;
 688                 else {
 689                         if (errno != EIO && catch_all_errors != YES)
 690                                 xerror(NO, NO, NO, "%s", srcfname);
 691                         switch (error_action) {
 692                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 693                                 case TFC_ERRACT_SYNC:
 694                                 case TFC_ERRACT_LSYNC:
 695                                         xerror(YES, NO, NO, "%s", srcfname);
 696                                         lio = ldone = lrem = lblock;
 697                                         memset(ctr, 0, lio);
 698                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 699                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 700                                         break;
 701                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 702                         }
 703                 }
 704                 if (lio && lio < lrem) {
 705                         pblk += lio;
 706                         lrem -= lio;
 707                         goto _ctrragain;
 708                 }
 709                 total_processed_src += ldone;
 710         }
 711
 712 _ctrskip1:
 713         if (iseek) {
 714                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 715                         iseek += ctrsz;
 716                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 717                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 718         }
 719
 720         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 721
 722         if (verbose) tfc_esay("%s: hashing password", progname);
 723
 724         if (rawkey == TFC_RAWKEY_KEYFILE) {
 725                 tfc_yesno xtskeyset = NO;
 726
 727                 pblk = key;
 728 _xts2key:       ldone = 0;
 729                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 730                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 731 _keyragain:     lio = xread(kfd, pblk, lrem);
 732                 if (lio != NOSIZE) ldone += lio;
 733                 else {
 734                         if (errno != EIO && catch_all_errors != YES)
 735                                 xerror(NO, NO, NO, "reading key");
 736                         switch (error_action) {
 737                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 738                                 case TFC_ERRACT_SYNC:
 739                                 case TFC_ERRACT_LSYNC:
 740                                         xerror(YES, NO, NO, "reading key");
 741                                         lio = ldone = lrem = lblock;
 742                                         memset(key, 0, lio);
 743                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 744                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 745                                         break;
 746                                 default: xerror(NO, NO, NO, "reading key"); break;
 747                         }
 748                 }
 749                 if (lio && lio < lrem) {
 750                         pblk += lio;
 751                         lrem -= lio;
 752                         goto _keyragain;
 753                 }
 754                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 755
 756                 if (ctr_mode == TFC_MODE_XTS) {
 757                         if (xtskeyset == NO) {
 758                                 pblk = xtskey;
 759                                 xtskeyset = YES;
 760                                 goto _xts2key;
 761                         }
 762                 }
 763         }
 764         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 765                 tfc_yesno xtskeyset = NO;
 766
 767                 pblk = key; n = sizeof(key);
 768 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 769                 getps.fd = getps.efd = -1;
 770                 getps.passwd = (char *)pblk;
 771                 getps.pwlen = n;
 772                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 773                 getps.charfilter = getps_filter;
 774                 getps.maskchar = 'x';
 775                 getps.flags = GETP_WAITFILL;
 776                 n = xgetpasswd(&getps);
 777                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 778                 if (n == ((size_t)-2)) xexit(1);
 779                 if (ctr_mode == TFC_MODE_XTS) {
 780                         if (xtskeyset == NO) {
 781                                 pblk = xtskey; n = sizeof(xtskey);
 782                                 xtskeyset = YES;
 783                                 goto _xts2keyaskstr;
 784                         }
 785                 }
 786         }
 787         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 788                 tfc_yesno xtskeyset = NO;
 789
 790                 pblk = key;
 791 _rawkey_hex_again:
 792                 memset(&getps, 0, sizeof(struct getpasswd_state));
 793                 getps.fd = getps.efd = -1;
 794                 getps.passwd = pwdask;
 795                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 796                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 797                 getps.charfilter = getps_hex_filter;
 798                 getps.maskchar = 'x';
 799                 getps.flags = GETP_WAITFILL;
 800                 n = xgetpasswd(&getps);
 801                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 802                 if (n == ((size_t)-2)) xexit(1);
 803                 if (n % 2) {
 804                         tfc_esay("Please input even number of hex digits!");
 805                         goto _rawkey_hex_again;
 806                 }
 807                 hex2bin(pblk, pwdask);
 808                 memset(pwdask, 0, sizeof(pwdask));
 809                 if (ctr_mode == TFC_MODE_XTS) {
 810                         if (xtskeyset == NO) {
 811                                 pblk = xtskey;
 812                                 xtskeyset = YES;
 813                                 goto _rawkey_hex_again;
 814                         }
 815                 }
 816         }
 817         else if (password) {
 818 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 819                 getps.fd = getps.efd = -1;
 820                 getps.passwd = pwdask;
 821                 getps.pwlen = sizeof(pwdask)-1;
 822                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 823                 getps.charfilter = getps_filter;
 824                 getps.maskchar = 'x';
 825                 getps.flags = GETP_WAITFILL;
 826                 n = xgetpasswd(&getps);
 827                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 828                 if (n == ((size_t)-2)) xexit(1);
 829                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 830                         getps.fd = getps.efd = -1;
 831                         getps.passwd = pwdagain;
 832                         getps.pwlen = sizeof(pwdagain)-1;
 833                         getps.echo = "Enter it again: ";
 834                         getps.flags = GETP_WAITFILL;
 835                         n = xgetpasswd(&getps);
 836                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 837                         if (n == ((size_t)-2)) xexit(1);
 838                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 839                                 tfc_esay("Passwords are different, try again");
 840                                 goto _pwdagain;
 841                         }
 842                 }
 843                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 844                 memset(pwdask, 0, sizeof(pwdask));
 845                 memset(pwdagain, 0, sizeof(pwdagain));
 846         }
 847         else {
 848                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 849                         xerror(NO, NO, YES, "hashing key");
 850         }
 851
 852         if (rawkey == NO) {
 853                 if (tfc_saltsz > 0) {
 854                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 855                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 856                 }
 857                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 858                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 859                 memset(tfc_salt, 0, TFC_MAX_SALT);
 860         }
 861
 862         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 863                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 864         }
 865
 866         if (genkeyf) {
 867                 int krfd;
 868                 tfc_yesno xtskeyset = NO;
 869
 870                 pblk = key;
 871                 if (!strcmp(genkeyf, "-")) krfd = 1;
 872                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 873                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 874 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 875                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 876                 if (verbose && xtskeyset == NO) {
 877                         tfc_esay("%s: password hashing done", progname);
 878                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 879                         tfc_esay("%s: Have a nice day!", progname);
 880                 }
 881
 882                 if (ctr_mode == TFC_MODE_XTS) {
 883                         if (xtskeyset == NO) {
 884                                 pblk = xtskey;
 885                                 xtskeyset = YES;
 886                                 goto _xts2genkey;
 887                         }
 888                 }
 889
 890                 fchmod(krfd, 0600);
 891                 xclose(krfd);
 892                 xexit(0);
 893         }
 894
 895         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 896                 if (verbose) tfc_esay("%s: disabling signature verification on "
 897                         "requested partial decryption.", progname);
 898                 do_mac = NO;
 899         }
 900
 901         if (do_mac != NO) {
 902                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 903                 if (ctr_mode < TFC_MODE_OCB) {
 904                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 905                                 "will be slower.", progname);
 906                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 907                         else skein_init(&sk, macbits);
 908                 }
 909         }
 910
 911         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 912                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 913         }
 914
 915         tf_convkey(key);
 916         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 917         if (do_tfcrypt1 == YES) {
 918                 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));
 919                 tf_key_tweak_compat(key);
 920         }
 921         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 922         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 923         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 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                 case TFC_CTR_ZERO: memset(ctr, 0, ctrsz); break;
 935         }
 936
 937 _ctrskip2:
 938         if (kfd != -1) {
 939                 xclose(kfd);
 940                 kfd = -1;
 941         }
 942         if (verbose) tfc_esay("%s: password hashing done", progname);
 943
 944         if (overwrite_source && srcfname) argv[idx] = srcfname;
 945
 946 _plain:
 947         if (argv[idx]) {
 948                 if (!strcmp(argv[idx], "-")) dfd = 1;
 949                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 950                 if (dfd == -1) {
 951                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 952                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 953                 }
 954                 dstfname = argv[idx];
 955                 idx++;
 956         }
 957
 958         if (oseek) {
 959                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 960                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
 961         }
 962
 963         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 964         memset(&sigact, 0, sizeof(sigact));
 965         sigact.sa_flags = SA_RESTART;
 966         sigact.sa_handler = print_crypt_status;
 967         sigaction(SIGUSR1, &sigact, NULL);
 968         sigaction(SIGTSTP, &sigact, NULL);
 969         sigaction(SIGALRM, &sigact, NULL);
 970         if (status_timer) setup_next_alarm(status_timer);
 971         sigact.sa_handler = change_status_width;
 972         sigaction(SIGQUIT, &sigact, NULL);
 973         sigact.sa_handler = change_status_timer;
 974         sigaction(SIGUSR2, &sigact, NULL);
 975         if (quiet == NO) {
 976                 sigact.sa_handler = print_crypt_status;
 977                 sigaction(SIGINT, &sigact, NULL);
 978                 sigaction(SIGTERM, &sigact, NULL);
 979         }
 980         else {
 981                 sigact.sa_handler = exit_sigterm;
 982                 sigaction(SIGINT, &sigact, NULL);
 983                 sigaction(SIGTERM, &sigact, NULL);
 984         }
 985         memset(&sigact, 0, sizeof(struct sigaction));
 986
 987         tfc_getcurtime(&delta_time);
 988
 989         errno = 0;
 990         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 991                 pblk = ctr;
 992                 lio = lrem = ctrsz;
 993                 ldone = 0;
 994 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
 995                 if (lio != NOSIZE) ldone += lio;
 996                 else xerror(NO, NO, NO, "%s", dstfname);
 997                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 998                 if (lio < lrem) {
 999                         pblk += lio;
1000                         lrem -= lio;
1001                         goto _ctrwagain;
1002                 }
1003                 total_processed_dst += ldone;
1004                 delta_processed += ldone;
1005         }
1006
1007         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
1008
1009         errno = 0;
1010         do_stop = NO;
1011         while (1) {
1012                 if (do_stop) break;
1013                 pblk = srcblk;
1014                 ldone = 0;
1015                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1016                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1017 _ragain:        lio = xread(sfd, pblk, lrem);
1018                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
1019                 if (lio != NOSIZE) ldone += lio;
1020                 else {
1021                         if (errno != EIO && catch_all_errors != YES)
1022                                 xerror(NO, NO, NO, "%s", srcfname);
1023                         switch (error_action) {
1024                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1025                                 case TFC_ERRACT_SYNC:
1026                                 case TFC_ERRACT_LSYNC:
1027                                         xerror(YES, NO, NO, "%s", srcfname);
1028                                         lio = ldone = lrem = lblock;
1029                                         memset(srcblk, 0, lio);
1030                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1031                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1032                                         break;
1033                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1034                         }
1035                 }
1036                 if (lio && lio < lrem) {
1037                         pblk += lio;
1038                         lrem -= lio;
1039                         goto _ragain;
1040                 }
1041                 total_processed_src += ldone;
1042
1043                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1044                         size_t orig = ldone;
1045                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1046                         if (ldone > blksize) ldone = blksize;
1047                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1048                 }
1049
1050                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1051                         skein_update(&sk, srcblk, ldone);
1052
1053                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1054                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1055                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1056                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1057                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1058                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1059                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1060                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1061                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1062                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1063                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1064                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1065                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1066                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1067
1068                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1069                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1070                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1071                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1072
1073                 else if (ctr_mode == TFC_MODE_PLAIN)
1074                         memcpy(dstblk, srcblk, ldone);
1075
1076                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1077                         skein_update(&sk, dstblk, ldone);
1078                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1079
1080                 pblk = dstblk;
1081                 lrem = ldone;
1082                 ldone = 0;
1083 _wagain:        lio = xwrite(dfd, pblk, lrem);
1084                 if (lio != NOSIZE) ldone += lio;
1085                 else xerror(NO, NO, NO, "%s", dstfname);
1086                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1087                 if (lio < lrem) {
1088                         pblk += lio;
1089                         lrem -= lio;
1090                         goto _wagain;
1091                 }
1092 _nowrite:       total_processed_dst += ldone;
1093                 delta_processed += ldone;
1094
1095                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1096         }
1097
1098         if (do_stop == TFC_STOP_FULL) goto _nomac;
1099
1100         errno = 0;
1101         if (do_mac >= TFC_MAC_VRFY) {
1102                 if (!do_mac_file) {
1103                         pblk = macvrfy;
1104                         ldone = 0;
1105                         lrem = lblock = TF_FROM_BITS(macbits);
1106                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1107 _macragain:             lio = xread(sfd, pblk, lrem);
1108                         if (lio != NOSIZE) ldone += lio;
1109                         else {
1110                                 if (errno != EIO && catch_all_errors != YES)
1111                                         xerror(NO, NO, NO, "%s", srcfname);
1112                                 switch (error_action) {
1113                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1114                                         case TFC_ERRACT_SYNC:
1115                                         case TFC_ERRACT_LSYNC:
1116                                                 xerror(YES, NO, NO, "%s", srcfname);
1117                                                 lio = ldone = lrem = lblock;
1118                                                 memset(macvrfy, 0, lio);
1119                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1120                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1121                                                 break;
1122                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1123                                 }
1124                         }
1125                         if (lio && lio < lrem) {
1126                                 pblk += lio;
1127                                 lrem -= lio;
1128                                 goto _macragain;
1129                         }
1130                         total_processed_src += ldone;
1131                 }
1132                 else {
1133                         int mfd;
1134
1135                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1136                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1137                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1138                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1139                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1140                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1141                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1142                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1143                                 lio = TF_FROM_BITS(macbits);
1144                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1145                         }
1146                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1147                         xclose(mfd);
1148                 }
1149
1150                 if (ldone < TF_FROM_BITS(macbits)) {
1151                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1152                                 "not verifying", progname, ldone);
1153                         exitcode = 1;
1154                         goto _shortmac;
1155                 }
1156
1157                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1158                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1159
1160                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1161                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1162                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1163                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1164                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1165                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1166
1167                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1168                         if (quiet == NO) {
1169                                 tfc_esay("%s: signature is good", progname);
1170                                 if (verbose) {
1171                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1172                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1173                                 }
1174                         }
1175                 }
1176                 else {
1177                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1178                                 "wrong password, key, mode, or file is not signed", progname);
1179                         exitcode = 1;
1180                 }
1181
1182 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1183                 memset(macresult, 0, sizeof(macresult));
1184                 memset(tmpdata, 0, sizeof(tmpdata));
1185         }
1186
1187         else if (do_mac == TFC_MAC_SIGN) {
1188                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1189                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1190
1191                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1192                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1193                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1194                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1195                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1196                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1197                 memset(macresult, 0, sizeof(macresult));
1198
1199                 if (!do_mac_file) {
1200                         pblk = tmpdata;
1201                         lio = lrem = TF_FROM_BITS(macbits);
1202                         ldone = 0;
1203 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1204                         if (lio != NOSIZE) ldone += lio;
1205                         else xerror(NO, NO, NO, "%s", dstfname);
1206                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1207                         if (lio < lrem) {
1208                                 pblk += lio;
1209                                 lrem -= lio;
1210                                 goto _macwagain;
1211                         }
1212                         total_processed_dst += ldone;
1213                         delta_processed += ldone;
1214                 }
1215                 else {
1216                         int mfd;
1217
1218                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1219                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1220                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1221                         if (do_outfmt == TFC_OUTFMT_B64) {
1222                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1223                                 memset(tmpdata, 0, TFC_TMPSIZE);
1224                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1225                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1226                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1227                                 if (lrem) {
1228                                         tmpdata[lrem] = '\n';
1229                                         lrem++;
1230                                 }
1231                                 lio = xwrite(mfd, tmpdata, lrem);
1232                         }
1233                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1234                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1235                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1236                         xclose(mfd);
1237                 }
1238
1239                 memset(macvrfy, 0, sizeof(macvrfy));
1240                 memset(macresult, 0, sizeof(macresult));
1241                 memset(tmpdata, 0, sizeof(tmpdata));
1242         }
1243
1244 _nomac:
1245         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1246
1247         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1248         xclose(sfd);
1249         xclose(dfd);
1250
1251         xexit(exitcode);
1252         return -1;
1253 }