tfcrypt.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
   6  *
   7  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  24  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "tfcrypt.h"
  30
  31 static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
  32 {
  33         if (chr == '\x03') {
  34                 getps->retn = ((size_t)-2);
  35                 return 6;
  36         }
  37         return 1;
  38 }
  39
  40 static int getps_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  41 {
  42         if (chr == '\x03') {
  43                 getps->retn = ((size_t)-2);
  44                 return 6;
  45         }
  46         if (chr >= '0' && chr <= '9') return 1;
  47         if (chr >= 'a' && chr <= 'f') return 1;
  48         if (chr >= 'A' && chr <= 'F') return 1;
  49         if (chr == '\x7f' || chr == '\x08'
  50         || chr == '\x15' || chr == '\x17') return 1;
  51         return 0;
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56         int c;
  57         double td;
  58         char *s, *d, *t, *stoi;
  59         size_t x, n;
  60
  61         progname = basename(argv[0]);
  62
  63         if (!isatty(2)) do_statline_dynamic = NO;
  64
  65         opterr = 0;
  66         while ((c = getopt(argc, argv, "s:aU:C:r:K:t:TPkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
  67                 switch (c) {
  68                         case 's':
  69                                 saltf = optarg;
  70                                 break;
  71                         case 'r':
  72                                 randsource = optarg;
  73                                 break;
  74                         case 'c':
  75                                 if (!strcasecmp(optarg, "show"))
  76                                         counter_opt = TFC_CTR_SHOW;
  77                                 else if (!strcasecmp(optarg, "head"))
  78                                         counter_opt = TFC_CTR_HEAD;
  79                                 else if (!strcasecmp(optarg, "rand"))
  80                                         counter_opt = TFC_CTR_RAND;
  81                                 else counter_file = sksum_hashlist_file = optarg;
  82                                 break;
  83                         case 'C':
  84                                 if (!strcasecmp(optarg, "ctr"))
  85                                         ctr_mode = TFC_MODE_CTR;
  86                                 else if (!strcasecmp(optarg, "stream"))
  87                                         ctr_mode = TFC_MODE_STREAM;
  88                                 else if (!strcasecmp(optarg, "cbc"))
  89                                         ctr_mode = TFC_MODE_CBC;
  90                                 else if (!strcasecmp(optarg, "ecb"))
  91                                         ctr_mode = TFC_MODE_ECB;
  92                                 else if (!strcasecmp(optarg, "xts"))
  93                                         ctr_mode = TFC_MODE_XTS;
  94                                 else if (!strcasecmp(optarg, "ocb"))
  95                                         ctr_mode = TFC_MODE_OCB;
  96                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
  97                                 break;
  98                         case 'P':
  99                                 do_edcrypt = TFC_DO_PLAIN;
 100                                 password = YES;
 101                                 ctr_mode = TFC_MODE_PLAIN;
 102                                 break;
 103                         case 'e':
 104                                 do_edcrypt = TFC_DO_ENCRYPT;
 105                                 break;
 106                         case 'd':
 107                                 do_edcrypt = TFC_DO_DECRYPT;
 108                                 break;
 109                         case 'D':
 110                                 macbits = strtoul(optarg, &stoi, 10);
 111                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 112                                 || macbits > TF_MAX_BITS || macbits % 8)
 113                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 114                                 break;
 115                         case 'n':
 116                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 117                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 118                                 break;
 119                         case 'U':
 120                                 if (!strcasecmp(optarg, "key"))
 121                                         mackey_opt = TFC_MACKEY_RAWKEY;
 122                                 else if (!strcasecmp(optarg, "pwd"))
 123                                         mackey_opt = TFC_MACKEY_PASSWORD;
 124                                 else {
 125                                         mackey_opt = TFC_MACKEY_FILE;
 126                                         mackeyf = optarg;
 127                                 }
 128                                 break;
 129                         case 'p':
 130                                 password = YES;
 131                                 break;
 132                         case 'k':
 133                                 rawkey = TFC_RAWKEY_KEYFILE;
 134                                 break;
 135                         case 'z':
 136                                 rawkey = TFC_RAWKEY_ASKSTR;
 137                                 break;
 138                         case 'x':
 139                                 rawkey = TFC_RAWKEY_ASKHEX;
 140                                 break;
 141                         case 'K':
 142                                 verbose = YES;
 143                                 genkeyf = optarg;
 144                                 break;
 145                         case 't':
 146                                 tweakf = optarg;
 147                                 break;
 148                         case 'T':
 149                                 tfc_saltsz = 0;
 150                                 do_tfcrypt1 = YES;
 151                                 break;
 152                         case 'l':
 153                                 if (maxlen != NOFSIZE) break;
 154
 155                                 maxlen = tfc_humanfsize(optarg, &stoi);
 156                                 if (!str_empty(stoi)) {
 157                                         maxlen = tfc_fnamesize(optarg, YES);
 158                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 159                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 160                                         "%s: invalid count value", optarg);
 161                                 }
 162                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 163                                 if (counter_opt == TFC_CTR_HEAD)
 164                                         maxlen += TF_BLOCK_SIZE;
 165                                 break;
 166                         case 'w':
 167                                 overwrite_source = YES;
 168                                 break;
 169                         case 'E':
 170                                 if (!strcmp(optarg, "xall")) {
 171                                         catch_all_errors = YES;
 172                                         break;
 173                                 }
 174                                 if (!strcmp(optarg, "exit"))
 175                                         error_action = TFC_ERRACT_EXIT;
 176                                 else if (!strncmp(optarg, "cont", 4))
 177                                         error_action = TFC_ERRACT_CONT;
 178                                 else if (!strcmp(optarg, "sync"))
 179                                         error_action = TFC_ERRACT_SYNC;
 180                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 181                                 break;
 182                         case 'O':
 183                                 s = d = optarg; t = NULL;
 184                                 while ((s = strtok_r(d, ",", &t))) {
 185                                         if (d) d = NULL;
 186                                         if (!strcmp(s, "sync"))
 187                                                 write_flags |= O_SYNC;
 188                                         else if (!strcmp(s, "trunc"))
 189                                                 write_flags |= O_TRUNC;
 190                                         else if (!strcmp(s, "fsync"))
 191                                                 do_fsync = YES;
 192                                         else if (!strcmp(s, "pad"))
 193                                                 do_pad = YES;
 194                                         else if (!strcmp(s, "xtime"))
 195                                                 do_preserve_time = YES;
 196                                         else if (!strcmp(s, "gibsize"))
 197                                                 do_stats_in_gibs = YES;
 198                                         else if (!strcmp(s, "plainstats"))
 199                                                 do_statline_dynamic = NO;
 200                                         else if (!strcmp(s, "statless"))
 201                                                 do_less_stats = YES;
 202                                         else if (!strcmp(s, "norepeat"))
 203                                                 no_repeat = YES;
 204                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 205                                                 pw_prompt = s+7;
 206                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 207                                                 mac_pw_prompt = s+10;
 208                                         else if (!strcmp(s, "shorthex"))
 209                                                 do_full_hexdump = NO;
 210                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 211                                                 s += 5;
 212                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 213                                                 if (!str_empty(stoi)) {
 214                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 215                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 216                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 217                                                         "%s: invalid block size value", s);
 218                                                 }
 219                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 220                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 221                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 222                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 223                                                         "%s: block size exceeds %u bytes",
 224                                                         s, TFC_U(TFC_BLKSIZE));
 225                                         }
 226                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 227                                                 s += 10;
 228                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 229                                                 if (!str_empty(stoi)) {
 230                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 231                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 232                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 233                                                         "%s: invalid blocks per xts block value", s);
 234                                                 }
 235                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 236                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 237                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 238                                                         s, TFC_U(TFC_BLKSIZE));
 239                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 240                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 241                                                         s, TFC_U(TFC_BLKSIZE));
 242                                         }
 243                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 244                                                 s += 6;
 245                                                 iseek = tfc_humanfsize(s, &stoi);
 246                                                 if (!str_empty(stoi)) {
 247                                                         iseek = tfc_fnamesize(s, YES);
 248                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 249                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 250                                                         "%s: invalid iseek value", s);
 251                                                 }
 252                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 253                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 254                                                         xerror(NO, YES, YES,
 255                                                                 "%s: not round to TF block size "
 256                                                                 "of %u bytes",
 257                                                                 s, TFC_U(TF_BLOCK_SIZE));
 258                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 259                                         }
 260                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 261                                                 s += 7;
 262                                                 iseek = tfc_humanfsize(s, &stoi);
 263                                                 if (!str_empty(stoi)) {
 264                                                         iseek = tfc_fnamesize(s, YES);
 265                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 266                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 267                                                                 "%s: invalid ixseek value", s);
 268                                                 }
 269                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 270                                         }
 271                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 272                                                 s += 5;
 273                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 274                                                 if (!str_empty(stoi)) {
 275                                                         iseek_blocks = tfc_fnamesize(s, YES);
 276                                                         if (iseek_blocks == NOFSIZE)
 277                                                                 xerror(NO, YES, YES,
 278                                                                 "%s: invalid ictr value", s);
 279                                                         iseek_blocks /= TF_BLOCK_SIZE;
 280                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 281                                                 }
 282                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 283                                         }
 284                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 285                                                 s += 6;
 286                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 287                                                 if (!str_empty(stoi)) {
 288                                                         iseek_blocks = tfc_fnamesize(s, YES);
 289                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 290                                                         if (iseek_blocks == NOFSIZE)
 291                                                                 xerror(NO, YES, YES,
 292                                                                 "%s: invalid ixctr value", s);
 293                                                 }
 294                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 295                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 296                                                         xerror(NO, YES, YES,
 297                                                         "%s: not round to TF block size "
 298                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 299                                                 iseek_blocks /= TF_BLOCK_SIZE;
 300                                         }
 301                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 302                                                 s += 6;
 303                                                 oseek = tfc_humanfsize(s, &stoi);
 304                                                 if (!str_empty(stoi)) {
 305                                                         oseek = tfc_fnamesize(s, YES);
 306                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 307                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 308                                                         "%s: invalid oseek value", s);
 309                                                 }
 310                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 311                                         }
 312                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 313                                                 s += 6;
 314                                                 maxlen = tfc_humanfsize(s, &stoi);
 315                                                 if (!str_empty(stoi)) {
 316                                                         maxlen = tfc_fnamesize(s, YES);
 317                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 318                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 319                                                         "%s: invalid count value", s);
 320                                                 }
 321                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 322                                                 if (counter_opt == TFC_CTR_HEAD)
 323                                                         maxlen += TF_BLOCK_SIZE;
 324                                         }
 325                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 326                                                 s += 5;
 327                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 328                                                 if (!str_empty(stoi)) {
 329                                                         maxkeylen = (size_t)tfc_fnamesize(s, YES);
 330                                                         maxkeylen = (size_t)tfc_modifysize((tfc_fsize)maxkeylen, strchr(s, ':'));
 331                                                         if (maxkeylen == NOSIZE)
 332                                                                 xerror(NO, YES, YES,
 333                                                                 "%s: invalid key length value", s);
 334                                                 }
 335                                                 else maxkeylen = (size_t)tfc_modifysize((tfc_fsize)maxkeylen, strchr(s, ':'));
 336                                         }
 337                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 338                                                 s += 5;
 339                                                 ctrsz = tfc_humanfsize(s, &stoi);
 340                                                 if (!str_empty(stoi)) {
 341                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 342                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 343                                                         if (ctrsz == NOSIZE)
 344                                                                 xerror(NO, YES, YES,
 345                                                                 "%s: invalid counter length value", s);
 346                                                 }
 347                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 348                                                 if (ctrsz > TF_BLOCK_SIZE)
 349                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 350                                         }
 351                                         else xerror(NO, YES, YES, "invalid option %s", s);
 352                                 }
 353                                 break;
 354                         case 'S':
 355                                 do_mac = TFC_MAC_SIGN;
 356                                 if (strcasecmp(optarg, "mac") != 0)
 357                                         do_mac_file = optarg;
 358                                 break;
 359                         case 'M':
 360                                 do_mac = TFC_MAC_VRFY;
 361                                 if (!strcasecmp(optarg, "drop"))
 362                                         do_mac = TFC_MAC_DROP;
 363                                 else if (strcasecmp(optarg, "mac") != 0)
 364                                         do_mac_file = optarg;
 365                                 break;
 366                         case 'm':
 367                                 if (do_mac != TFC_MAC_VRFY)
 368                                         xerror(NO, YES, YES, "signature source was not specified");
 369                                 do_mac = TFC_MAC_JUST_VRFY;
 370                                 break;
 371                         case 'R':
 372                         case 'Z':
 373                                 if (maxlen != NOFSIZE) {
 374                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 375                                         else genrandom_nr_bytes = maxlen;
 376                                 }
 377                                 else {
 378                                         tfc_fsize t;
 379                                         if (!strcasecmp(optarg, "cbs"))
 380                                                 t = TF_BLOCK_SIZE;
 381                                         else if (!strcasecmp(optarg, "ks"))
 382                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 383                                         else if (!strcasecmp(optarg, "xks"))
 384                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 385                                         else if (!strcasecmp(optarg, "iobs"))
 386                                                 t = blksize;
 387                                         else {
 388                                                 t = tfc_humanfsize(optarg, &stoi);
 389                                                 if (!str_empty(stoi)) {
 390                                                         t = tfc_fnamesize(optarg, NO);
 391                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 392                                                 }
 393                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 394                                         }
 395                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 396                                         else genrandom_nr_bytes = maxlen = t;
 397                                 }
 398                                 break;
 399                         case 'a':
 400                                 do_preserve_time = YES;
 401                                 break;
 402                         case 'A':
 403                                 do_outfmt = TFC_OUTFMT_B64;
 404                                 break;
 405                         case 'W':
 406                                 do_outfmt = TFC_OUTFMT_RAW;
 407                                 break;
 408                         case 'H':
 409                                 do_outfmt = TFC_OUTFMT_HEX;
 410                                 break;
 411                         case 'q':
 412                                 quiet = YES;
 413                                 verbose = NO;
 414                                 status_timer = 0;
 415                                 break;
 416                         case 'v':
 417                                 verbose = YES;
 418                                 break;
 419                         case 'V':
 420                                 td = strtod(optarg, &stoi);
 421                                 status_timer = TFC_DTOUSECS(td);
 422                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 423                                 break;
 424                         default:
 425                                 usage();
 426                                 break;
 427                 }
 428         }
 429
 430         if (!strcmp(progname, "tfbench")) {
 431                 if (!*(argv+optind)) usage();
 432
 433                 td = strtod(*(argv+optind), &stoi);
 434                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 435                         xerror(NO, YES, YES,
 436                         "%s: invalid benchmark time in seconds", *(argv+optind));
 437                 bench_timer = TFC_DTOUSECS(td);
 438                 do_benchmark(bench_timer, td);
 439         }
 440         if (genrandom_nr_bytes) {
 441                 ctr_mode = TFC_MODE_STREAM;
 442                 do_edcrypt = TFC_DO_ENCRYPT;
 443                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 444         }
 445         if (genzero_nr_bytes) {
 446                 ctr_mode = TFC_MODE_PLAIN;
 447                 do_edcrypt = TFC_DO_PLAIN;
 448                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 449         }
 450
 451         if (rawkey && password)
 452                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 453         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 454                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 455         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 456                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 457         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 458                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 459         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 460                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 461         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 462                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 463         if (tweakf && do_tfcrypt1 == NO)
 464                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 465         if (ctr_mode == TFC_MODE_PLAIN
 466         && (do_edcrypt || do_mac || rawkey
 467         || mackey_opt || counter_opt || counter_file))
 468                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 469
 470         errno = 0;
 471         do_stop = NO;
 472
 473         if (saltf) {
 474                 int saltfd;
 475
 476                 memset(tfc_salt, 0, TFC_MAX_SALT);
 477                 tfc_saltsz = 0;
 478                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 479
 480                 if (!strcmp(saltf, "-")) saltfd = 0;
 481                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 482                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 483                 lio = read(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 484                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 485                 tfc_saltsz = lio;
 486                 xclose(saltfd);
 487         }
 488
 489 _nosalt:
 490         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 491                 int mkfd = -1;
 492                 tfc_yesno do_stop;
 493
 494                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 495                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 496                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 497
 498                 skein_init(&sk, TFC_KEY_BITS);
 499
 500                 do_stop = NO;
 501                 while (1) {
 502                         if (do_stop) break;
 503                         pblk = tmpdata;
 504                         ldone = 0;
 505                         lrem = lblock = sizeof(tmpdata);
 506 _mkragain:              lio = read(mkfd, pblk, lrem);
 507                         if (lio == 0) do_stop = YES;
 508                         if (lio != NOSIZE) ldone += lio;
 509                         else {
 510                                 if (errno != EIO && catch_all_errors != YES)
 511                                         xerror(NO, NO, NO, "%s", mackeyf);
 512                                 switch (error_action) {
 513                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 514                                         case TFC_ERRACT_SYNC:
 515                                                 xerror(YES, NO, NO, "%s", mackeyf);
 516                                                 lio = ldone = lrem = lblock;
 517                                                 memset(tmpdata, 0, lio);
 518                                                 lseek(mkfd, lio, SEEK_CUR);
 519                                                 break;
 520                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 521                                 }
 522                         }
 523                         if (lio && lio < lrem) {
 524                                 pblk += lio;
 525                                 lrem -= lio;
 526                                 goto _mkragain;
 527                         }
 528
 529                         skein_update(&sk, tmpdata, ldone);
 530                 }
 531
 532                 skein_final(mackey, &sk);
 533
 534                 xclose(mkfd);
 535         }
 536         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 537                 memset(&getps, 0, sizeof(struct getpasswd_state));
 538                 getps.fd = getps.efd = -1;
 539                 getps.passwd = pwdask;
 540                 getps.pwlen = sizeof(pwdask)-1;
 541                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 542                 getps.charfilter = getps_filter;
 543                 getps.maskchar = 'x';
 544                 getps.flags = GETP_WAITFILL;
 545                 n = xgetpasswd(&getps);
 546                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 547                 if (n == ((size_t)-2)) xexit(1);
 548                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 549                 if (verbose) {
 550                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 551                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 552                         tfc_nfsay(stderr, "MAC password hint: ");
 553                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 554                         memset(tmpdata, 0, sizeof(tmpdata));
 555                 }
 556         }
 557
 558
 559         if ((strlen(progname) <= 9)
 560         && ((!strcmp(progname, "sksum"))
 561         || ((!memcmp(progname, "sk", 2))
 562         && (!memcmp(progname+3, "sum", 3)
 563         || !memcmp(progname+4, "sum", 3)
 564         || !memcmp(progname+5, "sum", 3)
 565         || !memcmp(progname+6, "sum", 3)))))
 566                 do_sksum(progname, argv+optind);
 567         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 568
 569         idx = optind;
 570
 571         if (argv[idx]) {
 572                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 573                 if (!strcmp(argv[idx], "-")) kfd = 0;
 574                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 575                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 576
 577                 lio = strnlen(argv[idx], PATH_MAX);
 578                 memset(argv[idx], '*', lio);
 579
 580                 idx++;
 581         }
 582         else password = YES;
 583
 584         errno = 0;
 585         if (do_tfcrypt1 == YES && tweakf) {
 586                 int twfd;
 587
 588                 if (!strcmp(tweakf, "-")) twfd = 0;
 589                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 590                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 591                 lio = ldone = read(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 592                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 593                 if (ldone < 2*TF_SIZE_UNIT)
 594                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 595                 xclose(twfd);
 596         }
 597
 598 _nokeyfd:
 599         errno = 0;
 600         if (argv[idx]) {
 601                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 602                 else {
 603                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 604                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 605                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 606                 }
 607                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 608
 609                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 610                         if (verbose) tfc_esay("%s: disabling signature verification on "
 611                                 "requested partial decryption.", progname);
 612                         do_mac = NO;
 613                 }
 614
 615                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 616                         maxlen = tfc_fdsize(sfd);
 617                         if (maxlen == NOFSIZE)
 618                                 xerror(NO, YES, YES,
 619                                 "Cannot verify embedded MAC with non-seekable source!");
 620                         maxlen -= TF_FROM_BITS(macbits);
 621                 }
 622                 srcfname = argv[idx];
 623                 idx++;
 624         }
 625
 626         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 627                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 628
 629         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 630         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 631
 632         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 633         errno = 0;
 634         if (counter_file) {
 635                 int ctrfd;
 636
 637                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 638                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 639                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 640                 lio = read(ctrfd, ctr, ctrsz);
 641                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 642                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 643                 xclose(ctrfd);
 644         }
 645         else if (counter_opt == TFC_CTR_HEAD) {
 646                 pblk = ctr;
 647                 ldone = 0;
 648                 lrem = lblock = ctrsz;
 649 _ctrragain:     lio = read(sfd, pblk, lrem);
 650                 if (lio != NOSIZE) ldone += lio;
 651                 else {
 652                         if (errno != EIO && catch_all_errors != YES)
 653                                 xerror(NO, NO, NO, "%s", srcfname);
 654                         switch (error_action) {
 655                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 656                                 case TFC_ERRACT_SYNC:
 657                                         xerror(YES, NO, NO, "%s", srcfname);
 658                                         lio = ldone = lrem = lblock;
 659                                         memset(ctr, 0, lio);
 660                                         lseek(sfd, lio, SEEK_CUR);
 661                                         break;
 662                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 663                         }
 664                 }
 665                 if (lio && lio < lrem) {
 666                         pblk += lio;
 667                         lrem -= lio;
 668                         goto _ctrragain;
 669                 }
 670                 total_processed_src += ldone;
 671         }
 672
 673 _ctrskip1:
 674         if (iseek) {
 675                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 676                         iseek += ctrsz;
 677                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 678                         xerror(YES, NO, NO, "%s: seek failed", srcfname);
 679         }
 680
 681         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 682
 683         if (verbose) tfc_esay("%s: hashing password", progname);
 684
 685         if (rawkey == TFC_RAWKEY_KEYFILE) {
 686                 tfc_yesno xtskeyset = NO;
 687
 688                 pblk = key;
 689 _xts2key:       ldone = 0;
 690                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 691 _keyragain:     lio = read(kfd, pblk, lrem);
 692                 if (lio != NOSIZE) ldone += lio;
 693                 else {
 694                         if (errno != EIO && catch_all_errors != YES)
 695                                 xerror(NO, NO, NO, "reading key");
 696                         switch (error_action) {
 697                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 698                                 case TFC_ERRACT_SYNC:
 699                                         xerror(YES, NO, NO, "reading key");
 700                                         lio = ldone = lrem = lblock;
 701                                         memset(key, 0, lio);
 702                                         lseek(kfd, lio, SEEK_CUR);
 703                                         break;
 704                                 default: xerror(NO, NO, NO, "reading key"); break;
 705                         }
 706                 }
 707                 if (lio && lio < lrem) {
 708                         pblk += lio;
 709                         lrem -= lio;
 710                         goto _keyragain;
 711                 }
 712                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 713
 714                 if (ctr_mode == TFC_MODE_XTS) {
 715                         if (xtskeyset == NO) {
 716                                 pblk = xtskey;
 717                                 xtskeyset = YES;
 718                                 goto _xts2key;
 719                         }
 720                 }
 721         }
 722         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 723                 tfc_yesno xtskeyset = NO;
 724
 725                 pblk = key; n = sizeof(key);
 726 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 727                 getps.fd = getps.efd = -1;
 728                 getps.passwd = (char *)pblk;
 729                 getps.pwlen = n;
 730                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 731                 getps.charfilter = getps_filter;
 732                 getps.maskchar = 'x';
 733                 getps.flags = GETP_WAITFILL;
 734                 n = xgetpasswd(&getps);
 735                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 736                 if (n == ((size_t)-2)) xexit(1);
 737                 if (ctr_mode == TFC_MODE_XTS) {
 738                         if (xtskeyset == NO) {
 739                                 pblk = xtskey; n = sizeof(xtskey);
 740                                 xtskeyset = YES;
 741                                 goto _xts2keyaskstr;
 742                         }
 743                 }
 744         }
 745         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 746                 tfc_yesno xtskeyset = NO;
 747
 748                 pblk = key;
 749 _rawkey_hex_again:
 750                 memset(&getps, 0, sizeof(struct getpasswd_state));
 751                 getps.fd = getps.efd = -1;
 752                 getps.passwd = pwdask;
 753                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 754                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 755                 getps.charfilter = getps_hex_filter;
 756                 getps.maskchar = 'x';
 757                 getps.flags = GETP_WAITFILL;
 758                 n = xgetpasswd(&getps);
 759                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 760                 if (n == ((size_t)-2)) xexit(1);
 761                 if (n % 2) {
 762                         tfc_esay("Please input even number of hex digits!");
 763                         goto _rawkey_hex_again;
 764                 }
 765                 hex2bin(pblk, pwdask);
 766                 memset(pwdask, 0, sizeof(pwdask));
 767                 if (ctr_mode == TFC_MODE_XTS) {
 768                         if (xtskeyset == NO) {
 769                                 pblk = xtskey;
 770                                 xtskeyset = YES;
 771                                 goto _rawkey_hex_again;
 772                         }
 773                 }
 774         }
 775         else if (password) {
 776 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 777                 getps.fd = getps.efd = -1;
 778                 getps.passwd = pwdask;
 779                 getps.pwlen = sizeof(pwdask)-1;
 780                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 781                 getps.charfilter = getps_filter;
 782                 getps.maskchar = 'x';
 783                 getps.flags = GETP_WAITFILL;
 784                 n = xgetpasswd(&getps);
 785                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 786                 if (n == ((size_t)-2)) xexit(1);
 787                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 788                         getps.fd = getps.efd = -1;
 789                         getps.passwd = pwdagain;
 790                         getps.pwlen = sizeof(pwdagain)-1;
 791                         getps.echo = "Enter it again: ";
 792                         getps.flags = GETP_WAITFILL;
 793                         n = xgetpasswd(&getps);
 794                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 795                         if (n == ((size_t)-2)) xexit(1);
 796                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 797                                 tfc_esay("Passwords are different, try again");
 798                                 goto _pwdagain;
 799                         }
 800                 }
 801                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 802                 memset(pwdask, 0, sizeof(pwdask));
 803                 memset(pwdagain, 0, sizeof(pwdagain));
 804         }
 805         else {
 806                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, maxkeylen) != YES)
 807                         xerror(NO, NO, YES, "hashing key");
 808         }
 809
 810         if (rawkey == NO) {
 811                 if (tfc_saltsz > 0) {
 812                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 813                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 814                 }
 815                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 816                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 817                 memset(tfc_salt, 0, TFC_MAX_SALT);
 818         }
 819
 820         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 821                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 822         }
 823
 824         if (genkeyf) {
 825                 int krfd;
 826                 tfc_yesno xtskeyset = NO;
 827
 828                 pblk = key;
 829                 if (!strcmp(genkeyf, "-")) krfd = 1;
 830                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 831                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 832 _xts2genkey:    if (write(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 833                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 834                 if (verbose && xtskeyset == NO) {
 835                         tfc_esay("%s: password hashing done", progname);
 836                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 837                         tfc_esay("%s: Have a nice day!", progname);
 838                 }
 839
 840                 if (ctr_mode == TFC_MODE_XTS) {
 841                         if (xtskeyset == NO) {
 842                                 pblk = xtskey;
 843                                 xtskeyset = YES;
 844                                 goto _xts2genkey;
 845                         }
 846                 }
 847
 848                 fchmod(krfd, 0600);
 849                 xclose(krfd);
 850                 xexit(0);
 851         }
 852
 853         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 854                 if (verbose) tfc_esay("%s: disabling signature verification on "
 855                         "requested partial decryption.", progname);
 856                 do_mac = NO;
 857         }
 858
 859         if (do_mac != NO) {
 860                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 861                 if (ctr_mode < TFC_MODE_OCB) {
 862                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 863                                 "will be slower.", progname);
 864                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 865                         else skein_init(&sk, macbits);
 866                 }
 867         }
 868
 869         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 870                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 871         }
 872
 873         tf_convkey(key);
 874         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 875         if (do_tfcrypt1 == YES) {
 876                 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));
 877                 tf_key_tweak_compat(key);
 878         }
 879         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 880         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 881         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 882         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 883
 884         switch (counter_opt) {
 885                 case TFC_CTR_SHOW:
 886                         switch (do_outfmt) {
 887                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 888                                 case TFC_OUTFMT_RAW: write(2, ctr, ctrsz); break;
 889                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 890                         }
 891                         break;
 892                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 893         }
 894
 895 _ctrskip2:
 896         if (kfd != -1) {
 897                 xclose(kfd);
 898                 kfd = -1;
 899         }
 900         if (verbose) tfc_esay("%s: password hashing done", progname);
 901
 902         if (overwrite_source && srcfname) argv[idx] = srcfname;
 903
 904 _plain:
 905         if (argv[idx]) {
 906                 if (!strcmp(argv[idx], "-")) dfd = 1;
 907                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 908                 if (dfd == -1) {
 909                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 910                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 911                 }
 912                 dstfname = argv[idx];
 913                 idx++;
 914         }
 915
 916         if (oseek) {
 917                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 918                         xerror(YES, NO, NO, "%s: seek failed", dstfname);
 919         }
 920
 921         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 922         memset(&sigact, 0, sizeof(sigact));
 923         sigact.sa_flags = SA_RESTART;
 924         sigact.sa_handler = print_crypt_status;
 925         sigaction(SIGUSR1, &sigact, NULL);
 926         sigaction(SIGTSTP, &sigact, NULL);
 927         sigaction(SIGALRM, &sigact, NULL);
 928         if (status_timer) setup_next_alarm(status_timer);
 929         sigact.sa_handler = change_status_width;
 930         sigaction(SIGQUIT, &sigact, NULL);
 931         sigact.sa_handler = change_status_timer;
 932         sigaction(SIGUSR2, &sigact, NULL);
 933         if (quiet == NO) {
 934                 sigact.sa_handler = print_crypt_status;
 935                 sigaction(SIGINT, &sigact, NULL);
 936                 sigaction(SIGTERM, &sigact, NULL);
 937         }
 938         else {
 939                 sigact.sa_handler = exit_sigterm;
 940                 sigaction(SIGINT, &sigact, NULL);
 941                 sigaction(SIGTERM, &sigact, NULL);
 942         }
 943         memset(&sigact, 0, sizeof(struct sigaction));
 944
 945         tfc_getcurtime(&delta_time);
 946
 947         errno = 0;
 948         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 949                 pblk = ctr;
 950                 lio = lrem = ctrsz;
 951                 ldone = 0;
 952 _ctrwagain:     lio = write(dfd, pblk, lrem);
 953                 if (lio != NOSIZE) ldone += lio;
 954                 else xerror(NO, NO, NO, "%s", dstfname);
 955                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 956                 if (lio < lrem) {
 957                         pblk += lio;
 958                         lrem -= lio;
 959                         goto _ctrwagain;
 960                 }
 961                 total_processed_dst += ldone;
 962                 delta_processed += ldone;
 963         }
 964
 965         errno = 0;
 966         do_stop = NO;
 967         while (1) {
 968                 if (do_stop) break;
 969                 pblk = srcblk;
 970                 ldone = 0;
 971                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
 972 _ragain:        lio = read(sfd, pblk, lrem);
 973                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
 974                 if (lio != NOSIZE) ldone += lio;
 975                 else {
 976                         if (errno != EIO && catch_all_errors != YES)
 977                                 xerror(NO, NO, NO, "%s", srcfname);
 978                         switch (error_action) {
 979                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
 980                                 case TFC_ERRACT_SYNC:
 981                                         xerror(YES, NO, NO, "%s", srcfname);
 982                                         lio = ldone = lrem = lblock;
 983                                         memset(srcblk, 0, lio);
 984                                         lseek(sfd, lio, SEEK_CUR);
 985                                         break;
 986                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 987                         }
 988                 }
 989                 if (lio && lio < lrem) {
 990                         pblk += lio;
 991                         lrem -= lio;
 992                         goto _ragain;
 993                 }
 994                 total_processed_src += ldone;
 995
 996                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
 997                         size_t orig = ldone;
 998                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
 999                         if (ldone > blksize) ldone = blksize;
1000                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1001                 }
1002
1003                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1004                         skein_update(&sk, srcblk, ldone);
1005
1006                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1007                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1008                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1009                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1010                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1011                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1012                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1013                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1014                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1015                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1016                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1017                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1018                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1019                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1020
1021                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1022                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1023                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1024                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1025
1026                 else if (ctr_mode == TFC_MODE_PLAIN)
1027                         memcpy(dstblk, srcblk, ldone);
1028
1029                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1030                         skein_update(&sk, dstblk, ldone);
1031                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1032
1033                 pblk = dstblk;
1034                 lrem = ldone;
1035                 ldone = 0;
1036 _wagain:        lio = write(dfd, pblk, lrem);
1037                 if (lio != NOSIZE) ldone += lio;
1038                 else xerror(NO, NO, NO, "%s", dstfname);
1039                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1040                 if (lio < lrem) {
1041                         pblk += lio;
1042                         lrem -= lio;
1043                         goto _wagain;
1044                 }
1045 _nowrite:       total_processed_dst += ldone;
1046                 delta_processed += ldone;
1047
1048                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1049         }
1050
1051         if (do_stop == TFC_STOP_FULL) goto _nomac;
1052
1053         errno = 0;
1054         if (do_mac >= TFC_MAC_VRFY) {
1055                 if (!do_mac_file) {
1056                         pblk = macvrfy;
1057                         ldone = 0;
1058                         lrem = lblock = TF_FROM_BITS(macbits);
1059 _macragain:             lio = read(sfd, pblk, lrem);
1060                         if (lio != NOSIZE) ldone += lio;
1061                         else {
1062                                 if (errno != EIO && catch_all_errors != YES)
1063                                         xerror(NO, NO, NO, "%s", srcfname);
1064                                 switch (error_action) {
1065                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1066                                         case TFC_ERRACT_SYNC:
1067                                                 xerror(YES, NO, NO, "%s", srcfname);
1068                                                 lio = ldone = lrem = lblock;
1069                                                 memset(macvrfy, 0, lio);
1070                                                 lseek(sfd, lio, SEEK_CUR);
1071                                                 break;
1072                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1073                                 }
1074                         }
1075                         if (lio && lio < lrem) {
1076                                 pblk += lio;
1077                                 lrem -= lio;
1078                                 goto _macragain;
1079                         }
1080                         total_processed_src += ldone;
1081                 }
1082                 else {
1083                         int mfd;
1084
1085                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1086                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1087                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1088                         lio = ldone = read(mfd, tmpdata, sizeof(tmpdata));
1089                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1090                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1091                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1092                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1093                                 lio = TF_FROM_BITS(macbits);
1094                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1095                         }
1096                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1097                         xclose(mfd);
1098                 }
1099
1100                 if (ldone < TF_FROM_BITS(macbits)) {
1101                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1102                                 "not verifying", progname, ldone);
1103                         exitcode = 1;
1104                         goto _shortmac;
1105                 }
1106
1107                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1108                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1109
1110                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1111                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1112                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1113                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1114                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1115                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1116
1117                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1118                         if (quiet == NO) {
1119                                 tfc_esay("%s: signature is good", progname);
1120                                 if (verbose) {
1121                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1122                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1123                                 }
1124                         }
1125                 }
1126                 else {
1127                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1128                                 "wrong password, key, mode, or file is not signed", progname);
1129                         exitcode = 1;
1130                 }
1131
1132 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1133                 memset(macresult, 0, sizeof(macresult));
1134                 memset(tmpdata, 0, sizeof(tmpdata));
1135         }
1136
1137         else if (do_mac == TFC_MAC_SIGN) {
1138                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1139                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1140
1141                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1142                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1143                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1144                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1145                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1146                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1147                 memset(macresult, 0, sizeof(macresult));
1148
1149                 if (!do_mac_file) {
1150                         pblk = tmpdata;
1151                         lio = lrem = TF_FROM_BITS(macbits);
1152                         ldone = 0;
1153 _macwagain:             lio = write(dfd, pblk, lrem);
1154                         if (lio != NOSIZE) ldone += lio;
1155                         else xerror(NO, NO, NO, "%s", dstfname);
1156                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1157                         if (lio < lrem) {
1158                                 pblk += lio;
1159                                 lrem -= lio;
1160                                 goto _macwagain;
1161                         }
1162                         total_processed_dst += ldone;
1163                         delta_processed += ldone;
1164                 }
1165                 else {
1166                         int mfd;
1167
1168                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1169                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1170                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1171                         if (do_outfmt == TFC_OUTFMT_B64) {
1172                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1173                                 memset(tmpdata, 0, TFC_TMPSIZE);
1174                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1175                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1176                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1177                                 if (lrem) {
1178                                         tmpdata[lrem] = '\n';
1179                                         lrem++;
1180                                 }
1181                                 lio = write(mfd, tmpdata, lrem);
1182                         }
1183                         else lio = write(mfd, tmpdata, TF_FROM_BITS(macbits));
1184                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1185                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1186                         xclose(mfd);
1187                 }
1188
1189                 memset(macvrfy, 0, sizeof(macvrfy));
1190                 memset(macresult, 0, sizeof(macresult));
1191                 memset(tmpdata, 0, sizeof(tmpdata));
1192         }
1193
1194 _nomac:
1195         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1196
1197         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1198         xclose(sfd);
1199         xclose(dfd);
1200
1201         xexit(exitcode);
1202         return -1;
1203 }