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                                 do_full_key = NO;
 163                                 break;
 164                         case 'T':
 165                                 tfc_saltsz = 0;
 166                                 do_full_key = NO;
 167                                 break;
 168                         case 'l':
 169                                 if (maxlen != NOFSIZE) break;
 170
 171                                 maxlen = tfc_humanfsize(optarg, &stoi);
 172                                 if (!str_empty(stoi)) {
 173                                         maxlen = tfc_fnamesize(optarg, YES);
 174                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 175                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 176                                         "%s: invalid count value", optarg);
 177                                 }
 178                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 179                                 if (counter_opt == TFC_CTR_HEAD)
 180                                         maxlen += TF_BLOCK_SIZE;
 181                                 break;
 182                         case 'w':
 183                                 overwrite_source = YES;
 184                                 break;
 185                         case 'E':
 186                                 if (!strcmp(optarg, "xall")) {
 187                                         catch_all_errors = YES;
 188                                         break;
 189                                 }
 190                                 if (!strcmp(optarg, "xseek")) {
 191                                         ignore_seek_errors = YES;
 192                                         break;
 193                                 }
 194                                 if (!strcmp(optarg, "exit"))
 195                                         error_action = TFC_ERRACT_EXIT;
 196                                 else if (!strncmp(optarg, "cont", 4))
 197                                         error_action = TFC_ERRACT_CONT;
 198                                 else if (!strcmp(optarg, "sync"))
 199                                         error_action = TFC_ERRACT_SYNC;
 200                                 else if (!strcmp(optarg, "lsync"))
 201                                         error_action = TFC_ERRACT_LSYNC;
 202                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 203                                 break;
 204                         case 'O':
 205                                 s = d = optarg; t = NULL;
 206                                 while ((s = strtok_r(d, ",", &t))) {
 207                                         if (d) d = NULL;
 208                                         if (!strcmp(s, "sync"))
 209                                                 write_flags |= O_SYNC;
 210                                         else if (!strcmp(s, "trunc"))
 211                                                 write_flags |= O_TRUNC;
 212                                         else if (!strcmp(s, "fsync"))
 213                                                 do_fsync = YES;
 214                                         else if (!strcmp(s, "pad"))
 215                                                 do_pad = YES;
 216                                         else if (!strcmp(s, "xtime"))
 217                                                 do_preserve_time = YES;
 218                                         else if (!strcmp(s, "gibsize"))
 219                                                 do_stats_in_gibs = YES;
 220                                         else if (!strcmp(s, "plainstats"))
 221                                                 do_statline_dynamic = NO;
 222                                         else if (!strcmp(s, "statless"))
 223                                                 do_less_stats = YES;
 224                                         else if (!strcmp(s, "norepeat"))
 225                                                 no_repeat = YES;
 226                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 227                                                 pw_prompt = s+7;
 228                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 229                                                 mac_pw_prompt = s+10;
 230                                         else if (!strcmp(s, "shorthex"))
 231                                                 do_full_hexdump = NO;
 232                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 233                                                 s += 5;
 234                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 235                                                 if (!str_empty(stoi)) {
 236                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 237                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 238                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 239                                                         "%s: invalid block size value", s);
 240                                                 }
 241                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 242                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 243                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 244                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 245                                                         "%s: block size exceeds %u bytes",
 246                                                         s, TFC_U(TFC_BLKSIZE));
 247                                         }
 248                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 249                                                 s += 10;
 250                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 251                                                 if (!str_empty(stoi)) {
 252                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 253                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 254                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 255                                                         "%s: invalid blocks per xts block value", s);
 256                                                 }
 257                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 258                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 259                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 260                                                         s, TFC_U(TFC_BLKSIZE));
 261                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 262                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 263                                                         s, TFC_U(TFC_BLKSIZE));
 264                                         }
 265                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 266                                                 s += 6;
 267                                                 iseek = tfc_humanfsize(s, &stoi);
 268                                                 if (!str_empty(stoi)) {
 269                                                         iseek = tfc_fnamesize(s, YES);
 270                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 271                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 272                                                         "%s: invalid iseek value", s);
 273                                                 }
 274                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 275                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 276                                                         xerror(NO, YES, YES,
 277                                                                 "%s: not round to TF block size "
 278                                                                 "of %u bytes",
 279                                                                 s, TFC_U(TF_BLOCK_SIZE));
 280                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 281                                         }
 282                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 283                                                 s += 7;
 284                                                 iseek = tfc_humanfsize(s, &stoi);
 285                                                 if (!str_empty(stoi)) {
 286                                                         iseek = tfc_fnamesize(s, YES);
 287                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 288                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 289                                                                 "%s: invalid ixseek value", s);
 290                                                 }
 291                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 292                                         }
 293                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 294                                                 s += 5;
 295                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 296                                                 if (!str_empty(stoi)) {
 297                                                         iseek_blocks = tfc_fnamesize(s, YES);
 298                                                         if (iseek_blocks == NOFSIZE)
 299                                                                 xerror(NO, YES, YES,
 300                                                                 "%s: invalid ictr value", s);
 301                                                         iseek_blocks /= TF_BLOCK_SIZE;
 302                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 303                                                 }
 304                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 305                                         }
 306                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 307                                                 s += 6;
 308                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 309                                                 if (!str_empty(stoi)) {
 310                                                         iseek_blocks = tfc_fnamesize(s, YES);
 311                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 312                                                         if (iseek_blocks == NOFSIZE)
 313                                                                 xerror(NO, YES, YES,
 314                                                                 "%s: invalid ixctr value", s);
 315                                                 }
 316                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 317                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 318                                                         xerror(NO, YES, YES,
 319                                                         "%s: not round to TF block size "
 320                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 321                                                 iseek_blocks /= TF_BLOCK_SIZE;
 322                                         }
 323                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 324                                                 s += 6;
 325                                                 oseek = tfc_humanfsize(s, &stoi);
 326                                                 if (!str_empty(stoi)) {
 327                                                         oseek = tfc_fnamesize(s, YES);
 328                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 329                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 330                                                         "%s: invalid oseek value", s);
 331                                                 }
 332                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 333                                         }
 334                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 335                                                 s += 6;
 336                                                 maxlen = tfc_humanfsize(s, &stoi);
 337                                                 if (!str_empty(stoi)) {
 338                                                         maxlen = tfc_fnamesize(s, YES);
 339                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 340                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 341                                                         "%s: invalid count value", s);
 342                                                 }
 343                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 344                                                 if (counter_opt == TFC_CTR_HEAD)
 345                                                         maxlen += TF_BLOCK_SIZE;
 346                                         }
 347                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 348                                                 s += 5;
 349                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 350                                                 if (!str_empty(stoi)) {
 351                                                         maxkeylen = tfc_fnamesize(s, YES);
 352                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 353                                                         if (maxkeylen == NOSIZE)
 354                                                                 xerror(NO, YES, YES,
 355                                                                 "%s: invalid key length value", s);
 356                                                 }
 357                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 358                                         }
 359                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 360                                                 s += 5;
 361                                                 keyoffset = tfc_humanfsize(s, &stoi);
 362                                                 if (!str_empty(stoi)) {
 363                                                         keyoffset = tfc_fnamesize(s, YES);
 364                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 365                                                         if (keyoffset == NOFSIZE)
 366                                                                 xerror(NO, YES, YES,
 367                                                                 "%s: invalid key offset value", s);
 368                                                 }
 369                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 370                                         }
 371                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 372                                                 s += 5;
 373                                                 ctrsz = tfc_humanfsize(s, &stoi);
 374                                                 if (!str_empty(stoi)) {
 375                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 376                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 377                                                         if (ctrsz == NOSIZE)
 378                                                                 xerror(NO, YES, YES,
 379                                                                 "%s: invalid counter length value", s);
 380                                                 }
 381                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 382                                                 if (ctrsz > TF_BLOCK_SIZE)
 383                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 384                                         }
 385                                         else xerror(NO, YES, YES, "invalid option %s", s);
 386                                 }
 387                                 break;
 388                         case 'S':
 389                                 do_mac = TFC_MAC_SIGN;
 390                                 if (strcasecmp(optarg, "mac") != 0)
 391                                         do_mac_file = optarg;
 392                                 break;
 393                         case 'M':
 394                                 do_mac = TFC_MAC_VRFY;
 395                                 if (!strcasecmp(optarg, "drop"))
 396                                         do_mac = TFC_MAC_DROP;
 397                                 else if (strcasecmp(optarg, "mac") != 0)
 398                                         do_mac_file = optarg;
 399                                 break;
 400                         case 'm':
 401                                 if (do_mac != TFC_MAC_VRFY)
 402                                         xerror(NO, YES, YES, "signature source was not specified");
 403                                 do_mac = TFC_MAC_JUST_VRFY;
 404                                 break;
 405                         case 'R':
 406                         case 'Z':
 407                                 if (maxlen != NOFSIZE) {
 408                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 409                                         else genrandom_nr_bytes = maxlen;
 410                                 }
 411                                 else {
 412                                         tfc_fsize t;
 413                                         if (!strcasecmp(optarg, "cbs"))
 414                                                 t = TF_BLOCK_SIZE;
 415                                         else if (!strcasecmp(optarg, "ks"))
 416                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 417                                         else if (!strcasecmp(optarg, "xks"))
 418                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 419                                         else if (!strcasecmp(optarg, "iobs"))
 420                                                 t = blksize;
 421                                         else {
 422                                                 t = tfc_humanfsize(optarg, &stoi);
 423                                                 if (!str_empty(stoi)) {
 424                                                         t = tfc_fnamesize(optarg, NO);
 425                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 426                                                 }
 427                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 428                                         }
 429                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 430                                         else genrandom_nr_bytes = maxlen = t;
 431                                 }
 432                                 break;
 433                         case 'a':
 434                                 do_preserve_time = YES;
 435                                 break;
 436                         case 'A':
 437                                 do_outfmt = TFC_OUTFMT_B64;
 438                                 break;
 439                         case 'W':
 440                                 do_outfmt = TFC_OUTFMT_RAW;
 441                                 break;
 442                         case 'H':
 443                                 do_outfmt = TFC_OUTFMT_HEX;
 444                                 break;
 445                         case 'q':
 446                                 quiet = YES;
 447                                 verbose = NO;
 448                                 status_timer = 0;
 449                                 break;
 450                         case 'v':
 451                                 verbose = YES;
 452                                 break;
 453                         case 'V':
 454                                 td = strtod(optarg, &stoi);
 455                                 status_timer = TFC_DTOUSECS(td);
 456                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 457                                 break;
 458                         default:
 459                                 usage();
 460                                 break;
 461                 }
 462         }
 463
 464         if (!strcmp(progname, "tfbench")) {
 465                 if (!*(argv+optind)) usage();
 466
 467                 td = strtod(*(argv+optind), &stoi);
 468                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 469                         xerror(NO, YES, YES,
 470                         "%s: invalid benchmark time in seconds", *(argv+optind));
 471                 bench_timer = TFC_DTOUSECS(td);
 472                 do_benchmark(bench_timer, td);
 473         }
 474         if (genrandom_nr_bytes) {
 475                 ctr_mode = TFC_MODE_STREAM;
 476                 do_edcrypt = TFC_DO_ENCRYPT;
 477                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 478         }
 479         if (genzero_nr_bytes) {
 480                 ctr_mode = TFC_MODE_PLAIN;
 481                 do_edcrypt = TFC_DO_PLAIN;
 482                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 483         }
 484
 485         if (rawkey && password)
 486                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 487         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 488                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 489         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 490                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 491         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 492                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 493         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 494                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 495         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 496                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 497         if (ctr_mode == TFC_MODE_PLAIN
 498         && (do_edcrypt || do_mac || rawkey
 499         || mackey_opt || counter_opt || counter_file))
 500                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 501
 502         errno = 0;
 503         do_stop = NO;
 504
 505         if (saltf) {
 506                 int saltfd;
 507
 508                 memset(tfc_salt, 0, TFC_MAX_SALT);
 509                 tfc_saltsz = 0;
 510                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 511
 512                 if (!strcmp(saltf, "-")) saltfd = 0;
 513                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 514                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 515                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 516                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 517                 tfc_saltsz = lio;
 518                 xclose(saltfd);
 519         }
 520
 521 _nosalt:
 522         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 523                 int mkfd = -1;
 524                 tfc_yesno do_stop;
 525
 526                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 527                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 528                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 529
 530                 skein_init(&sk, TFC_KEY_BITS);
 531
 532                 do_stop = NO;
 533                 while (1) {
 534                         if (do_stop) break;
 535                         pblk = tmpdata;
 536                         ldone = 0;
 537                         lrem = lblock = sizeof(tmpdata);
 538                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 539 _mkragain:              lio = xread(mkfd, pblk, lrem);
 540                         if (lio == 0) do_stop = YES;
 541                         if (lio != NOSIZE) ldone += lio;
 542                         else {
 543                                 if (errno != EIO && catch_all_errors != YES)
 544                                         xerror(NO, NO, NO, "%s", mackeyf);
 545                                 switch (error_action) {
 546                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 547                                         case TFC_ERRACT_SYNC:
 548                                         case TFC_ERRACT_LSYNC:
 549                                                 xerror(YES, NO, NO, "%s", mackeyf);
 550                                                 lio = ldone = lrem = lblock;
 551                                                 memset(tmpdata, 0, lio);
 552                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 553                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 554                                                 break;
 555                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 556                                 }
 557                         }
 558                         if (lio && lio < lrem) {
 559                                 pblk += lio;
 560                                 lrem -= lio;
 561                                 goto _mkragain;
 562                         }
 563
 564                         skein_update(&sk, tmpdata, ldone);
 565                 }
 566
 567                 skein_final(mackey, &sk);
 568
 569                 xclose(mkfd);
 570         }
 571         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 572                 memset(&getps, 0, sizeof(struct getpasswd_state));
 573                 getps.fd = getps.efd = -1;
 574                 getps.passwd = pwdask;
 575                 getps.pwlen = sizeof(pwdask)-1;
 576                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 577                 getps.charfilter = getps_filter;
 578                 getps.maskchar = 'x';
 579                 getps.flags = GETP_WAITFILL;
 580                 n = xgetpasswd(&getps);
 581                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 582                 if (n == ((size_t)-2)) xexit(1);
 583                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 584                 if (verbose) {
 585                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 586                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 587                         tfc_nfsay(stderr, "MAC password hint: ");
 588                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 589                         memset(tmpdata, 0, sizeof(tmpdata));
 590                 }
 591         }
 592
 593
 594         if ((strlen(progname) <= 9)
 595         && ((!strcmp(progname, "sksum"))
 596         || ((!memcmp(progname, "sk", 2))
 597         && (!memcmp(progname+3, "sum", 3)
 598         || !memcmp(progname+4, "sum", 3)
 599         || !memcmp(progname+5, "sum", 3)
 600         || !memcmp(progname+6, "sum", 3)))))
 601                 do_sksum(progname, argv+optind);
 602         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 603
 604         idx = optind;
 605
 606         if (argv[idx]) {
 607                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 608                 if (!strcmp(argv[idx], "-")) kfd = 0;
 609                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 610                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 611
 612                 lio = strnlen(argv[idx], PATH_MAX);
 613                 memset(argv[idx], '*', lio);
 614
 615                 idx++;
 616         }
 617         else password = YES;
 618
 619         errno = 0;
 620         if (do_full_key == NO && tweakf) {
 621                 int twfd;
 622
 623                 if (!strcmp(tweakf, "-")) twfd = 0;
 624                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 625                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 626                 lio = ldone = xread(twfd, tweak, TF_TWEAK_SIZE);
 627                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 628                 if (ldone < TF_TWEAK_SIZE)
 629                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, TF_TWEAK_SIZE);
 630                 xclose(twfd);
 631         }
 632
 633 _nokeyfd:
 634         errno = 0;
 635         if (argv[idx]) {
 636                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 637                 else {
 638                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 639                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 640                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 641                 }
 642                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 643
 644                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 645                         if (verbose) tfc_esay("%s: disabling signature verification on "
 646                                 "requested partial decryption.", progname);
 647                         do_mac = NO;
 648                 }
 649
 650                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 651                         maxlen = tfc_fdsize(sfd);
 652                         if (maxlen == NOFSIZE)
 653                                 xerror(NO, YES, YES,
 654                                 "Cannot verify embedded MAC with non-seekable source!");
 655                         maxlen -= TF_FROM_BITS(macbits);
 656                 }
 657                 srcfname = argv[idx];
 658                 idx++;
 659         }
 660
 661         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 662                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 663
 664         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 665         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 666
 667         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 668         errno = 0;
 669         if (counter_file) {
 670                 int ctrfd;
 671
 672                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 673                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 674                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 675                 lio = xread(ctrfd, ctr, ctrsz);
 676                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 677                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 678                 xclose(ctrfd);
 679         }
 680         else if (counter_opt == TFC_CTR_HEAD) {
 681                 pblk = ctr;
 682                 ldone = 0;
 683                 lrem = lblock = ctrsz;
 684                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 685 _ctrragain:     lio = xread(sfd, pblk, lrem);
 686                 if (lio != NOSIZE) ldone += lio;
 687                 else {
 688                         if (errno != EIO && catch_all_errors != YES)
 689                                 xerror(NO, NO, NO, "%s", srcfname);
 690                         switch (error_action) {
 691                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 692                                 case TFC_ERRACT_SYNC:
 693                                 case TFC_ERRACT_LSYNC:
 694                                         xerror(YES, NO, NO, "%s", srcfname);
 695                                         lio = ldone = lrem = lblock;
 696                                         memset(ctr, 0, lio);
 697                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 698                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 699                                         break;
 700                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 701                         }
 702                 }
 703                 if (lio && lio < lrem) {
 704                         pblk += lio;
 705                         lrem -= lio;
 706                         goto _ctrragain;
 707                 }
 708                 total_processed_src += ldone;
 709         }
 710
 711 _ctrskip1:
 712         if (iseek) {
 713                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 714                         iseek += ctrsz;
 715                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 716                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 717         }
 718
 719         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 720
 721         if (verbose) tfc_esay("%s: hashing password", progname);
 722
 723         if (rawkey == TFC_RAWKEY_KEYFILE) {
 724                 tfc_yesno xtskeyset = NO;
 725
 726                 pblk = key;
 727 _xts2key:       ldone = 0;
 728                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 729                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 730 _keyragain:     lio = xread(kfd, pblk, lrem);
 731                 if (lio != NOSIZE) ldone += lio;
 732                 else {
 733                         if (errno != EIO && catch_all_errors != YES)
 734                                 xerror(NO, NO, NO, "reading key");
 735                         switch (error_action) {
 736                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 737                                 case TFC_ERRACT_SYNC:
 738                                 case TFC_ERRACT_LSYNC:
 739                                         xerror(YES, NO, NO, "reading key");
 740                                         lio = ldone = lrem = lblock;
 741                                         memset(key, 0, lio);
 742                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 743                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 744                                         break;
 745                                 default: xerror(NO, NO, NO, "reading key"); break;
 746                         }
 747                 }
 748                 if (lio && lio < lrem) {
 749                         pblk += lio;
 750                         lrem -= lio;
 751                         goto _keyragain;
 752                 }
 753                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 754
 755                 if (ctr_mode == TFC_MODE_XTS) {
 756                         if (xtskeyset == NO) {
 757                                 pblk = xtskey;
 758                                 xtskeyset = YES;
 759                                 goto _xts2key;
 760                         }
 761                 }
 762         }
 763         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 764                 tfc_yesno xtskeyset = NO;
 765
 766                 pblk = key; n = sizeof(key);
 767 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 768                 getps.fd = getps.efd = -1;
 769                 getps.passwd = (char *)pblk;
 770                 getps.pwlen = n;
 771                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 772                 getps.charfilter = getps_filter;
 773                 getps.maskchar = 'x';
 774                 getps.flags = GETP_WAITFILL;
 775                 n = xgetpasswd(&getps);
 776                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 777                 if (n == ((size_t)-2)) xexit(1);
 778                 if (ctr_mode == TFC_MODE_XTS) {
 779                         if (xtskeyset == NO) {
 780                                 pblk = xtskey; n = sizeof(xtskey);
 781                                 xtskeyset = YES;
 782                                 goto _xts2keyaskstr;
 783                         }
 784                 }
 785         }
 786         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 787                 tfc_yesno xtskeyset = NO;
 788
 789                 pblk = key;
 790 _rawkey_hex_again:
 791                 memset(&getps, 0, sizeof(struct getpasswd_state));
 792                 getps.fd = getps.efd = -1;
 793                 getps.passwd = pwdask;
 794                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 795                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 796                 getps.charfilter = getps_hex_filter;
 797                 getps.maskchar = 'x';
 798                 getps.flags = GETP_WAITFILL;
 799                 n = xgetpasswd(&getps);
 800                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 801                 if (n == ((size_t)-2)) xexit(1);
 802                 if (n % 2) {
 803                         tfc_esay("Please input even number of hex digits!");
 804                         goto _rawkey_hex_again;
 805                 }
 806                 hex2bin(pblk, pwdask);
 807                 memset(pwdask, 0, sizeof(pwdask));
 808                 if (ctr_mode == TFC_MODE_XTS) {
 809                         if (xtskeyset == NO) {
 810                                 pblk = xtskey;
 811                                 xtskeyset = YES;
 812                                 goto _rawkey_hex_again;
 813                         }
 814                 }
 815         }
 816         else if (password) {
 817 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 818                 getps.fd = getps.efd = -1;
 819                 getps.passwd = pwdask;
 820                 getps.pwlen = sizeof(pwdask)-1;
 821                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 822                 getps.charfilter = getps_filter;
 823                 getps.maskchar = 'x';
 824                 getps.flags = GETP_WAITFILL;
 825                 n = xgetpasswd(&getps);
 826                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 827                 if (n == ((size_t)-2)) xexit(1);
 828                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 829                         getps.fd = getps.efd = -1;
 830                         getps.passwd = pwdagain;
 831                         getps.pwlen = sizeof(pwdagain)-1;
 832                         getps.echo = "Enter it again: ";
 833                         getps.flags = GETP_WAITFILL;
 834                         n = xgetpasswd(&getps);
 835                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 836                         if (n == ((size_t)-2)) xexit(1);
 837                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 838                                 tfc_esay("Passwords are different, try again");
 839                                 goto _pwdagain;
 840                         }
 841                 }
 842                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 843                 memset(pwdask, 0, sizeof(pwdask));
 844                 memset(pwdagain, 0, sizeof(pwdagain));
 845         }
 846         else {
 847                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 848                         xerror(NO, NO, YES, "hashing key");
 849         }
 850
 851         if (rawkey == NO) {
 852                 if (tfc_saltsz > 0) {
 853                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 854                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 855                 }
 856                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 857                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 858                 memset(tfc_salt, 0, TFC_MAX_SALT);
 859         }
 860
 861         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 862                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 863         }
 864
 865         if (genkeyf) {
 866                 int krfd;
 867                 tfc_yesno xtskeyset = NO;
 868
 869                 pblk = key;
 870                 if (!strcmp(genkeyf, "-")) krfd = 1;
 871                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 872                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 873 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 874                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 875                 if (verbose && xtskeyset == NO) {
 876                         tfc_esay("%s: password hashing done", progname);
 877                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 878                         tfc_esay("%s: Have a nice day!", progname);
 879                 }
 880
 881                 if (ctr_mode == TFC_MODE_XTS) {
 882                         if (xtskeyset == NO) {
 883                                 pblk = xtskey;
 884                                 xtskeyset = YES;
 885                                 goto _xts2genkey;
 886                         }
 887                 }
 888
 889                 fchmod(krfd, 0600);
 890                 xclose(krfd);
 891                 xexit(0);
 892         }
 893
 894         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 895                 if (verbose) tfc_esay("%s: disabling signature verification on "
 896                         "requested partial decryption.", progname);
 897                 do_mac = NO;
 898         }
 899
 900         if (do_mac != NO) {
 901                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 902                 if (ctr_mode < TFC_MODE_OCB) {
 903                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 904                                 "will be slower.", progname);
 905                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 906                         else skein_init(&sk, macbits);
 907                 }
 908         }
 909
 910         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 911                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 912         }
 913
 914         tf_convkey(key);
 915         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 916         if (do_full_key == NO) {
 917                 if (!tweakf) skein(tweak, TF_NR_TWEAK_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 918                 tf_tweak_set(key, tweak);
 919         }
 920         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 921         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 922         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 923
 924         switch (counter_opt) {
 925                 case TFC_CTR_SHOW:
 926                         switch (do_outfmt) {
 927                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 928                                 case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
 929                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 930                         }
 931                         break;
 932                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 933                 case TFC_CTR_ZERO: memset(ctr, 0, ctrsz); break;
 934         }
 935
 936 _ctrskip2:
 937         if (kfd != -1) {
 938                 xclose(kfd);
 939                 kfd = -1;
 940         }
 941         if (verbose) tfc_esay("%s: password hashing done", progname);
 942
 943         if (overwrite_source && srcfname) argv[idx] = srcfname;
 944
 945 _plain:
 946         if (argv[idx]) {
 947                 if (!strcmp(argv[idx], "-")) dfd = 1;
 948                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 949                 if (dfd == -1) {
 950                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 951                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 952                 }
 953                 dstfname = argv[idx];
 954                 idx++;
 955         }
 956
 957         if (oseek) {
 958                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 959                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
 960         }
 961
 962         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 963         memset(&sigact, 0, sizeof(sigact));
 964         sigact.sa_flags = SA_RESTART;
 965         sigact.sa_handler = print_crypt_status;
 966         sigaction(SIGUSR1, &sigact, NULL);
 967         sigaction(SIGTSTP, &sigact, NULL);
 968         sigaction(SIGALRM, &sigact, NULL);
 969         if (status_timer) setup_next_alarm(status_timer);
 970         sigact.sa_handler = change_status_width;
 971         sigaction(SIGQUIT, &sigact, NULL);
 972         sigact.sa_handler = change_status_timer;
 973         sigaction(SIGUSR2, &sigact, NULL);
 974         if (quiet == NO) {
 975                 sigact.sa_handler = print_crypt_status;
 976                 sigaction(SIGINT, &sigact, NULL);
 977                 sigaction(SIGTERM, &sigact, NULL);
 978         }
 979         else {
 980                 sigact.sa_handler = exit_sigterm;
 981                 sigaction(SIGINT, &sigact, NULL);
 982                 sigaction(SIGTERM, &sigact, NULL);
 983         }
 984         memset(&sigact, 0, sizeof(struct sigaction));
 985
 986         tfc_getcurtime(&delta_time);
 987
 988         errno = 0;
 989         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 990                 pblk = ctr;
 991                 lio = lrem = ctrsz;
 992                 ldone = 0;
 993 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
 994                 if (lio != NOSIZE) ldone += lio;
 995                 else xerror(NO, NO, NO, "%s", dstfname);
 996                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 997                 if (lio < lrem) {
 998                         pblk += lio;
 999                         lrem -= lio;
1000                         goto _ctrwagain;
1001                 }
1002                 total_processed_dst += ldone;
1003                 delta_processed += ldone;
1004         }
1005
1006         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
1007
1008         errno = 0;
1009         do_stop = NO;
1010         while (1) {
1011                 if (do_stop) break;
1012                 pblk = srcblk;
1013                 ldone = 0;
1014                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1015                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1016 _ragain:        lio = xread(sfd, pblk, lrem);
1017                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
1018                 if (lio != NOSIZE) ldone += lio;
1019                 else {
1020                         if (errno != EIO && catch_all_errors != YES)
1021                                 xerror(NO, NO, NO, "%s", srcfname);
1022                         switch (error_action) {
1023                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1024                                 case TFC_ERRACT_SYNC:
1025                                 case TFC_ERRACT_LSYNC:
1026                                         xerror(YES, NO, NO, "%s", srcfname);
1027                                         lio = ldone = lrem = lblock;
1028                                         memset(srcblk, 0, lio);
1029                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1030                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1031                                         break;
1032                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1033                         }
1034                 }
1035                 if (lio && lio < lrem) {
1036                         pblk += lio;
1037                         lrem -= lio;
1038                         goto _ragain;
1039                 }
1040                 total_processed_src += ldone;
1041
1042                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1043                         size_t orig = ldone;
1044                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1045                         if (ldone > blksize) ldone = blksize;
1046                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1047                 }
1048
1049                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1050                         skein_update(&sk, srcblk, ldone);
1051
1052                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1053                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1054                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1055                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1056                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1057                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1058                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1059                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1060                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1061                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1062                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1063                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1064                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1065                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1066
1067                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1068                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1069                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1070                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1071
1072                 else if (ctr_mode == TFC_MODE_PLAIN)
1073                         memcpy(dstblk, srcblk, ldone);
1074
1075                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1076                         skein_update(&sk, dstblk, ldone);
1077                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1078
1079                 pblk = dstblk;
1080                 lrem = ldone;
1081                 ldone = 0;
1082 _wagain:        lio = xwrite(dfd, pblk, lrem);
1083                 if (lio != NOSIZE) ldone += lio;
1084                 else xerror(NO, NO, NO, "%s", dstfname);
1085                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1086                 if (lio < lrem) {
1087                         pblk += lio;
1088                         lrem -= lio;
1089                         goto _wagain;
1090                 }
1091 _nowrite:       total_processed_dst += ldone;
1092                 delta_processed += ldone;
1093
1094                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1095         }
1096
1097         if (do_stop == TFC_STOP_FULL) goto _nomac;
1098
1099         errno = 0;
1100         if (do_mac >= TFC_MAC_VRFY) {
1101                 if (!do_mac_file) {
1102                         pblk = macvrfy;
1103                         ldone = 0;
1104                         lrem = lblock = TF_FROM_BITS(macbits);
1105                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1106 _macragain:             lio = xread(sfd, pblk, lrem);
1107                         if (lio != NOSIZE) ldone += lio;
1108                         else {
1109                                 if (errno != EIO && catch_all_errors != YES)
1110                                         xerror(NO, NO, NO, "%s", srcfname);
1111                                 switch (error_action) {
1112                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1113                                         case TFC_ERRACT_SYNC:
1114                                         case TFC_ERRACT_LSYNC:
1115                                                 xerror(YES, NO, NO, "%s", srcfname);
1116                                                 lio = ldone = lrem = lblock;
1117                                                 memset(macvrfy, 0, lio);
1118                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1119                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1120                                                 break;
1121                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1122                                 }
1123                         }
1124                         if (lio && lio < lrem) {
1125                                 pblk += lio;
1126                                 lrem -= lio;
1127                                 goto _macragain;
1128                         }
1129                         total_processed_src += ldone;
1130                 }
1131                 else {
1132                         int mfd;
1133
1134                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1135                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1136                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1137                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1138                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1139                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1140                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1141                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1142                                 lio = TF_FROM_BITS(macbits);
1143                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1144                         }
1145                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1146                         xclose(mfd);
1147                 }
1148
1149                 if (ldone < TF_FROM_BITS(macbits)) {
1150                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1151                                 "not verifying", progname, ldone);
1152                         exitcode = 1;
1153                         goto _shortmac;
1154                 }
1155
1156                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1157                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1158
1159                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1160                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1161                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1162                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1163                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1164                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1165
1166                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1167                         if (quiet == NO) {
1168                                 tfc_esay("%s: signature is good", progname);
1169                                 if (verbose) {
1170                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1171                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1172                                 }
1173                         }
1174                 }
1175                 else {
1176                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1177                                 "wrong password, key, mode, or file is not signed", progname);
1178                         exitcode = 1;
1179                 }
1180
1181 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1182                 memset(macresult, 0, sizeof(macresult));
1183                 memset(tmpdata, 0, sizeof(tmpdata));
1184         }
1185
1186         else if (do_mac == TFC_MAC_SIGN) {
1187                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1188                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1189
1190                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1191                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1192                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1193                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1194                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1195                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1196                 memset(macresult, 0, sizeof(macresult));
1197
1198                 if (!do_mac_file) {
1199                         pblk = tmpdata;
1200                         lio = lrem = TF_FROM_BITS(macbits);
1201                         ldone = 0;
1202 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1203                         if (lio != NOSIZE) ldone += lio;
1204                         else xerror(NO, NO, NO, "%s", dstfname);
1205                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1206                         if (lio < lrem) {
1207                                 pblk += lio;
1208                                 lrem -= lio;
1209                                 goto _macwagain;
1210                         }
1211                         total_processed_dst += ldone;
1212                         delta_processed += ldone;
1213                 }
1214                 else {
1215                         int mfd;
1216
1217                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1218                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1219                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1220                         if (do_outfmt == TFC_OUTFMT_B64) {
1221                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1222                                 memset(tmpdata, 0, TFC_TMPSIZE);
1223                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1224                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1225                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1226                                 if (lrem) {
1227                                         tmpdata[lrem] = '\n';
1228                                         lrem++;
1229                                 }
1230                                 lio = xwrite(mfd, tmpdata, lrem);
1231                         }
1232                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1233                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1234                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1235                         xclose(mfd);
1236                 }
1237
1238                 memset(macvrfy, 0, sizeof(macvrfy));
1239                 memset(macresult, 0, sizeof(macresult));
1240                 memset(tmpdata, 0, sizeof(tmpdata));
1241         }
1242
1243 _nomac:
1244         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1245
1246         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1247         xclose(sfd);
1248         xclose(dfd);
1249
1250         xexit(exitcode);
1251         return -1;
1252 }