tfcrypt.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2019 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 tfc_byte svctr[TF_BLOCK_SIZE];
  32
  33 static void open_log(const char *logfile)
  34 {
  35         int fd;
  36
  37         fd = open(logfile, O_WRONLY | O_CREAT | O_LARGEFILE | O_TRUNC, 0666);
  38         if (fd == -1) xerror(NO, NO, YES, "%s", logfile);
  39         xclose(2);
  40         if (dup2(fd, 2) == -1) xexit(2);
  41         xclose(fd);
  42         do_statline_dynamic = NO;
  43 }
  44
  45 static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
  46 {
  47         if (chr == '\x03') {
  48                 getps->retn = ((size_t)-2);
  49                 return 6;
  50         }
  51         return 1;
  52 }
  53
  54 static int getps_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  55 {
  56         if (chr == '\x03') {
  57                 getps->retn = ((size_t)-2);
  58                 return 6;
  59         }
  60         if (chr >= '0' && chr <= '9') return 1;
  61         if (chr >= 'a' && chr <= 'f') return 1;
  62         if (chr >= 'A' && chr <= 'F') return 1;
  63         if (chr == '\x7f' || chr == '\x08'
  64         || chr == '\x15' || chr == '\x17') return 1;
  65         return 0;
  66 }
  67
  68 static inline int isctrlchr(int c)
  69 {
  70         if (c == 9) return 0;
  71         if (c >= 0 && c <= 31) return 1;
  72         if (c == 127) return 1;
  73         return 0;
  74 }
  75
  76 static int getps_plain_filter(struct getpasswd_state *getps, char chr, size_t pos)
  77 {
  78         int x;
  79
  80         x = getps_filter(getps, chr, pos);
  81         if (x != 1) return x;
  82
  83         if (pos < getps->pwlen && !isctrlchr(chr))
  84                 write(getps->efd, &chr, sizeof(char));
  85         return 1;
  86 }
  87
  88 static int getps_plain_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  89 {
  90         int x;
  91
  92         x = getps_hex_filter(getps, chr, pos);
  93         if (x != 1) return x;
  94
  95         if (pos < getps->pwlen && !isctrlchr(chr))
  96                 write(getps->efd, &chr, sizeof(char));
  97         return 1;
  98 }
  99
 100 static void make_hint(void *hint, size_t szhint, const void *data, size_t szdata)
 101 {
 102         char t[TF_FROM_BITS(TF_MAX_BITS)];
 103
 104         skein(t, TF_MAX_BITS, NULL, data, szdata);
 105         xor_shrink(hint, szhint, t, sizeof(t));
 106         memset(t, 0, sizeof(t));
 107 }
 108
 109 static void raw_say_hint(void *hint, size_t szhint, const void *data, size_t szdata, const char *prompt)
 110 {
 111         make_hint(hint, szhint, data, szdata);
 112         if (prompt) tfc_nfsay(stderr, "%s: ", prompt);
 113         mehexdump(hint, szhint, szhint, 1);
 114         memset(hint, 0, szhint);
 115 }
 116
 117 static void say_hint(const void *data, size_t szdata, const char *prompt)
 118 {
 119         char t[TF_SIZE_UNIT];
 120         raw_say_hint(t, TF_SIZE_UNIT, data, szdata, prompt);
 121         /* t[] is erased (automatically) */
 122 }
 123
 124 int main(int argc, char **argv)
 125 {
 126         int c;
 127         double td;
 128         char *s, *d, *t, *stoi;
 129         size_t x, n;
 130         tfc_fsize rwd;
 131
 132         progname = basename(argv[0]);
 133
 134         if (!isatty(2)) do_statline_dynamic = NO;
 135
 136         s = (char *)srcblk;
 137         d = getenv("HOME");
 138         if (!d) d = "";
 139         n = PATH_MAX > sizeof(srcblk) ? sizeof(srcblk) : PATH_MAX;
 140         if (xstrlcpy(s, d, n) >= n) goto _baddfname;
 141         if (xstrlcat(s, "/.tfcrypt.defs", n) >= n) goto _baddfname;
 142         read_defaults(s, YES);
 143 _baddfname:
 144         memset(s, 0, n);
 145
 146         if (!strcmp(progname, "iotool")) {
 147                 do_edcrypt = TFC_DO_PLAIN;
 148                 password = YES;
 149                 ctr_mode = TFC_MODE_PLAIN;
 150         }
 151
 152         opterr = 0;
 153         while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:Pkzxc:l:qedn:vV:pwE:o:O:S:AmuM:R:Z:WHD:")) != -1) {
 154                 switch (c) {
 155                         case 'L':
 156                                 read_defaults(optarg, NO);
 157                                 break;
 158                         case 's':
 159                                 saltf = optarg;
 160                                 break;
 161                         case 'r':
 162                                 randsource = optarg;
 163                                 break;
 164                         case 'c':
 165                                 if (!strcasecmp(optarg, "show"))
 166                                         counter_opt = TFC_CTR_SHOW;
 167                                 else if (!strcasecmp(optarg, "head"))
 168                                         counter_opt = TFC_CTR_HEAD;
 169                                 else if (!strcasecmp(optarg, "rand"))
 170                                         counter_opt = TFC_CTR_RAND;
 171                                 else if (!strcasecmp(optarg, "zero"))
 172                                         counter_opt = TFC_CTR_ZERO;
 173                                 else if (strchr(optarg, ':')) {
 174                                         char *ss, chr;
 175
 176                                         counter_opt = TFC_CTR_SSET;
 177                                         n = sizeof(ctr);
 178
 179                                         s = d = optarg; t = NULL;
 180                                         while ((s = strtok_r(d, ",", &t))) {
 181                                                 if (d) d = NULL;
 182
 183                                                 if (n == 0) break;
 184                                                 ss = strchr(s, ':');
 185                                                 if (!ss) continue;
 186                                                 *ss = 0; ss++;
 187                                                 chr = (char)strtoul(s, &stoi, 16);
 188                                                 if (!str_empty(stoi)) continue;
 189                                                 x = (size_t)strtoul(ss, &stoi, 10);
 190                                                 if (!str_empty(stoi)) continue;
 191                                                 if (x > n) x = n;
 192                                                 memset(ctr+(sizeof(ctr)-n), (int)chr, x);
 193                                                 n -= x;
 194                                         }
 195                                 }
 196                                 else counter_file = sksum_hashlist_file = optarg;
 197                                 break;
 198                         case 'C':
 199                                 if (!strcasecmp(optarg, "ctr"))
 200                                         ctr_mode = TFC_MODE_CTR;
 201                                 else if (!strcasecmp(optarg, "stream"))
 202                                         ctr_mode = TFC_MODE_STREAM;
 203                                 else if (!strcasecmp(optarg, "cbc"))
 204                                         ctr_mode = TFC_MODE_CBC;
 205                                 else if (!strcasecmp(optarg, "ecb"))
 206                                         ctr_mode = TFC_MODE_ECB;
 207                                 else if (!strcasecmp(optarg, "xts"))
 208                                         ctr_mode = TFC_MODE_XTS;
 209                                 else if (!strcasecmp(optarg, "ocb"))
 210                                         ctr_mode = TFC_MODE_OCB;
 211                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
 212                                 break;
 213                         case 'P':
 214                                 do_edcrypt = TFC_DO_PLAIN;
 215                                 password = YES;
 216                                 ctr_mode = TFC_MODE_PLAIN;
 217                                 break;
 218                         case 'e':
 219                                 if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_ENCRYPT;
 220                                 break;
 221                         case 'd':
 222                                 if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_DECRYPT;
 223                                 break;
 224                         case 'D':
 225                                 macbits = strtoul(optarg, &stoi, 10);
 226                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 227                                 || macbits > TF_MAX_BITS || macbits % 8)
 228                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 229                                 break;
 230                         case 'n':
 231                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 232                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 233                                 break;
 234                         case 'U':
 235                                 if (!strcasecmp(optarg, "key"))
 236                                         mackey_opt = TFC_MACKEY_RAWKEY;
 237                                 else if (!strcasecmp(optarg, "pwd"))
 238                                         mackey_opt = TFC_MACKEY_PASSWORD;
 239                                 else {
 240                                         mackey_opt = TFC_MACKEY_FILE;
 241                                         mackeyf = optarg;
 242                                 }
 243                                 break;
 244                         case 'p':
 245                                 password = YES;
 246                                 break;
 247                         case 'k':
 248                                 rawkey = TFC_RAWKEY_KEYFILE;
 249                                 break;
 250                         case 'z':
 251                                 rawkey = TFC_RAWKEY_ASKSTR;
 252                                 break;
 253                         case 'x':
 254                                 rawkey = TFC_RAWKEY_ASKHEX;
 255                                 break;
 256                         case 'K':
 257                                 verbose = YES;
 258                                 genkeyf = optarg;
 259                                 break;
 260                         case 't':
 261                                 tweakf = optarg;
 262                                 do_full_key = NO;
 263                                 break;
 264                         case 'l':
 265                                 if (maxlen != NOFSIZE) break;
 266
 267                                 maxlen = tfc_humanfsize(optarg, &stoi);
 268                                 if (!str_empty(stoi)) {
 269                                         maxlen = tfc_fnamesize(optarg, YES);
 270                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 271                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 272                                         "%s: invalid count value", optarg);
 273                                 }
 274                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 275                                 if (counter_opt == TFC_CTR_HEAD)
 276                                         maxlen += TF_BLOCK_SIZE;
 277                                 break;
 278                         case 'w':
 279                                 overwrite_source = YES;
 280                                 break;
 281                         case 'E':
 282                                 if (!strcmp(optarg, "xall")) {
 283                                         catch_all_errors = YES;
 284                                         break;
 285                                 }
 286                                 if (!strcmp(optarg, "xseek")) {
 287                                         ignore_seek_errors = YES;
 288                                         break;
 289                                 }
 290                                 if (!strcmp(optarg, "exit"))
 291                                         error_action = TFC_ERRACT_EXIT;
 292                                 else if (!strncmp(optarg, "cont", 4))
 293                                         error_action = TFC_ERRACT_CONT;
 294                                 else if (!strcmp(optarg, "sync"))
 295                                         error_action = TFC_ERRACT_SYNC;
 296                                 else if (!strcmp(optarg, "lsync"))
 297                                         error_action = TFC_ERRACT_LSYNC;
 298                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 299                                 break;
 300                         case 'o':
 301                                 open_log(optarg);
 302                                 break;
 303                         case 'O':
 304                                 s = d = optarg; t = NULL;
 305                                 while ((s = strtok_r(d, ",", &t))) {
 306                                         if (d) d = NULL;
 307                                         if (!strcmp(s, "sync"))
 308                                                 write_flags |= O_SYNC;
 309                                         else if (!strcmp(s, "trunc"))
 310                                                 write_flags |= O_TRUNC;
 311                                         else if (!strcmp(s, "fsync"))
 312                                                 do_fsync = YES;
 313                                         else if (!strcmp(s, "pad"))
 314                                                 do_pad = YES;
 315                                         else if (!strcmp(s, "xtime"))
 316                                                 do_preserve_time = YES;
 317                                         else if (!strcmp(s, "gibsize"))
 318                                                 do_stats_in_gibs = YES;
 319                                         else if (!strcmp(s, "plainstats"))
 320                                                 do_statline_dynamic = NO;
 321                                         else if (!strcmp(s, "statless"))
 322                                                 do_less_stats = YES;
 323                                         else if (!strcmp(s, "norepeat"))
 324                                                 no_repeat = YES;
 325                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 326                                                 pw_prompt = s+7;
 327                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 328                                                 mac_pw_prompt = s+10;
 329                                         else if (!strcmp(s, "shorthex"))
 330                                                 do_full_hexdump = NO;
 331                                         else if (!strcmp(s, "fullkey"))
 332                                                 do_full_key = YES;
 333                                         else if (!strcmp(s, "showsecrets"))
 334                                                 show_secrets = YES;
 335                                         else if (!strcmp(s, "finished"))
 336                                                 show_when_done = YES;
 337                                         else if (!strncmp(s, "logfile", 7) && *(s+7) == '=')
 338                                                 open_log(s+8);
 339                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 340                                                 s += 5;
 341                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 342                                                 if (!str_empty(stoi)) {
 343                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 344                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 345                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 346                                                         "%s: invalid block size value", s);
 347                                                 }
 348                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 349                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 350                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 351                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 352                                                         "%s: block size exceeds %u bytes",
 353                                                         s, TFC_U(TFC_BLKSIZE));
 354                                         }
 355                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 356                                                 s += 10;
 357                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 358                                                 if (!str_empty(stoi)) {
 359                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 360                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 361                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 362                                                         "%s: invalid blocks per xts block value", s);
 363                                                 }
 364                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 365                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 366                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 367                                                         s, TFC_U(TFC_BLKSIZE));
 368                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 369                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 370                                                         s, TFC_U(TFC_BLKSIZE));
 371                                         }
 372                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 373                                                 s += 6;
 374                                                 iseek = tfc_humanfsize(s, &stoi);
 375                                                 if (!str_empty(stoi)) {
 376                                                         iseek = tfc_fnamesize(s, YES);
 377                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 378                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 379                                                         "%s: invalid iseek value", s);
 380                                                 }
 381                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 382                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 383                                                         xerror(NO, YES, YES,
 384                                                                 "%s: not round to TF block size "
 385                                                                 "of %u bytes",
 386                                                                 s, TFC_U(TF_BLOCK_SIZE));
 387                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 388                                         }
 389                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 390                                                 s += 7;
 391                                                 iseek = tfc_humanfsize(s, &stoi);
 392                                                 if (!str_empty(stoi)) {
 393                                                         iseek = tfc_fnamesize(s, YES);
 394                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 395                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 396                                                                 "%s: invalid ixseek value", s);
 397                                                 }
 398                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 399                                         }
 400                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 401                                                 s += 5;
 402                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 403                                                 if (!str_empty(stoi)) {
 404                                                         iseek_blocks = tfc_fnamesize(s, YES);
 405                                                         if (iseek_blocks == NOFSIZE)
 406                                                                 xerror(NO, YES, YES,
 407                                                                 "%s: invalid ictr value", s);
 408                                                         iseek_blocks /= TF_BLOCK_SIZE;
 409                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 410                                                 }
 411                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 412                                         }
 413                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 414                                                 s += 6;
 415                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 416                                                 if (!str_empty(stoi)) {
 417                                                         iseek_blocks = tfc_fnamesize(s, YES);
 418                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 419                                                         if (iseek_blocks == NOFSIZE)
 420                                                                 xerror(NO, YES, YES,
 421                                                                 "%s: invalid ixctr value", s);
 422                                                 }
 423                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 424                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 425                                                         xerror(NO, YES, YES,
 426                                                         "%s: not round to TF block size "
 427                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 428                                                 iseek_blocks /= TF_BLOCK_SIZE;
 429                                         }
 430                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 431                                                 s += 6;
 432                                                 oseek = tfc_humanfsize(s, &stoi);
 433                                                 if (!str_empty(stoi)) {
 434                                                         oseek = tfc_fnamesize(s, YES);
 435                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 436                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 437                                                         "%s: invalid oseek value", s);
 438                                                 }
 439                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 440                                         }
 441                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 442                                                 s += 6;
 443                                                 maxlen = tfc_humanfsize(s, &stoi);
 444                                                 if (!str_empty(stoi)) {
 445                                                         maxlen = tfc_fnamesize(s, YES);
 446                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 447                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 448                                                         "%s: invalid count value", s);
 449                                                 }
 450                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 451                                                 if (counter_opt == TFC_CTR_HEAD)
 452                                                         maxlen += TF_BLOCK_SIZE;
 453                                         }
 454                                         else if (!strncmp(s, "ftrunc", 6) && *(s+6) == '=') {
 455                                                 s += 7;
 456                                                 if (!strcmp(s, "tail")) {
 457                                                         do_ftrunc = TFC_FTRUNC_TAIL;
 458                                                         ftrunc_dfd = NOFSIZE;
 459                                                 }
 460                                                 else {
 461                                                         do_ftrunc = TFC_DO_FTRUNC;
 462                                                         ftrunc_dfd = tfc_humanfsize(s, &stoi);
 463                                                         if (!str_empty(stoi)) {
 464                                                                 ftrunc_dfd = tfc_fnamesize(s, YES);
 465                                                                 ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 466                                                                 if (ftrunc_dfd == NOFSIZE) xerror(NO, YES, YES,
 467                                                                 "%s: invalid ftrunc value", s);
 468                                                         }
 469                                                         else ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 470                                                 }
 471                                         }
 472                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 473                                                 s += 5;
 474                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 475                                                 if (!str_empty(stoi)) {
 476                                                         maxkeylen = tfc_fnamesize(s, YES);
 477                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 478                                                         if (maxkeylen == NOSIZE)
 479                                                                 xerror(NO, YES, YES,
 480                                                                 "%s: invalid key length value", s);
 481                                                 }
 482                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 483                                         }
 484                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 485                                                 s += 5;
 486                                                 keyoffset = tfc_humanfsize(s, &stoi);
 487                                                 if (!str_empty(stoi)) {
 488                                                         keyoffset = tfc_fnamesize(s, YES);
 489                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 490                                                         if (keyoffset == NOFSIZE)
 491                                                                 xerror(NO, YES, YES,
 492                                                                 "%s: invalid key offset value", s);
 493                                                 }
 494                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 495                                         }
 496                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 497                                                 s += 5;
 498                                                 ctrsz = tfc_humanfsize(s, &stoi);
 499                                                 if (!str_empty(stoi)) {
 500                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 501                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 502                                                         if (ctrsz == NOSIZE)
 503                                                                 xerror(NO, YES, YES,
 504                                                                 "%s: invalid counter length value", s);
 505                                                 }
 506                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 507                                                 if (ctrsz > TF_BLOCK_SIZE)
 508                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 509                                         }
 510                                         else xerror(NO, YES, YES, "invalid option %s", s);
 511                                 }
 512                                 break;
 513                         case 'S':
 514                                 do_mac = TFC_MAC_SIGN;
 515                                 if (strcasecmp(optarg, "mac") != 0)
 516                                         do_mac_file = optarg;
 517                                 break;
 518                         case 'M':
 519                                 do_mac = TFC_MAC_VRFY;
 520                                 if (!strcasecmp(optarg, "drop"))
 521                                         do_mac = TFC_MAC_DROP;
 522                                 else if (strcasecmp(optarg, "mac") != 0)
 523                                         do_mac_file = optarg;
 524                                 break;
 525                         case 'm':
 526                         case 'u':
 527                                 if (do_mac != TFC_MAC_VRFY)
 528                                         xerror(NO, YES, YES, "signature source was not specified");
 529                                 do_mac = TFC_MAC_JUST_VRFY;
 530                                 if (c == 'u') do_mac = TFC_MAC_JUST_VRFY2;
 531                                 break;
 532                         case 'R':
 533                         case 'Z':
 534                                 if (maxlen != NOFSIZE) {
 535                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 536                                         else genrandom_nr_bytes = maxlen;
 537                                 }
 538                                 else {
 539                                         tfc_fsize t;
 540                                         if (!strcasecmp(optarg, "cbs"))
 541                                                 t = TF_BLOCK_SIZE;
 542                                         else if (!strcasecmp(optarg, "ks"))
 543                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 544                                         else if (!strcasecmp(optarg, "xks"))
 545                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 546                                         else if (!strcasecmp(optarg, "iobs"))
 547                                                 t = blksize;
 548                                         else {
 549                                                 t = tfc_humanfsize(optarg, &stoi);
 550                                                 if (!str_empty(stoi)) {
 551                                                         t = tfc_fnamesize(optarg, NO);
 552                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 553                                                 }
 554                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 555                                         }
 556                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 557                                         else genrandom_nr_bytes = maxlen = t;
 558                                 }
 559                                 break;
 560                         case 'a':
 561                                 do_preserve_time = YES;
 562                                 break;
 563                         case 'A':
 564                                 do_outfmt = TFC_OUTFMT_B64;
 565                                 break;
 566                         case 'W':
 567                                 do_outfmt = TFC_OUTFMT_RAW;
 568                                 break;
 569                         case 'H':
 570                                 do_outfmt = TFC_OUTFMT_HEX;
 571                                 break;
 572                         case 'q':
 573                                 quiet = YES;
 574                                 verbose = NO;
 575                                 do_full_hexdump = NO;
 576                                 status_timer = 0;
 577                                 break;
 578                         case 'v':
 579                                 verbose = YES;
 580                                 break;
 581                         case 'V':
 582                                 td = strtod(optarg, &stoi);
 583                                 status_timer = TFC_DTOUSECS(td);
 584                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 585                                 break;
 586                         default:
 587                                 usage();
 588                                 break;
 589                 }
 590         }
 591
 592         if (!strcmp(progname, "tfbench")) {
 593                 if (!*(argv+optind)) usage();
 594
 595                 td = strtod(*(argv+optind), &stoi);
 596                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 597                         xerror(NO, YES, YES,
 598                         "%s: invalid benchmark time in seconds", *(argv+optind));
 599                 bench_timer = TFC_DTOUSECS(td);
 600                 do_benchmark(bench_timer, td);
 601         }
 602         if (genrandom_nr_bytes) {
 603                 ctr_mode = TFC_MODE_STREAM;
 604                 do_edcrypt = TFC_DO_ENCRYPT;
 605                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 606         }
 607         if (genzero_nr_bytes) {
 608                 ctr_mode = TFC_MODE_PLAIN;
 609                 do_edcrypt = TFC_DO_PLAIN;
 610                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 611         }
 612
 613         if (rawkey && password)
 614                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 615         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 616                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 617         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 618                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 619         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 620                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 621         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 622                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 623         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 624                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 625         if (ctr_mode == TFC_MODE_PLAIN
 626         && (do_edcrypt || do_mac || rawkey
 627         || mackey_opt || counter_opt || counter_file))
 628                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 629
 630         errno = 0;
 631         do_stop = NO;
 632
 633         if (saltf) {
 634                 int saltfd;
 635
 636                 memset(tfc_salt, 0, TFC_MAX_SALT);
 637                 tfc_saltsz = 0;
 638                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 639
 640                 if (!strcmp(saltf, "-")) saltfd = 0;
 641                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 642                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 643                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 644                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 645                 tfc_saltsz = lio;
 646                 xclose(saltfd);
 647         }
 648
 649 _nosalt:
 650         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 651                 int mkfd = -1;
 652                 tfc_yesno do_stop;
 653
 654                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 655                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 656                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 657
 658                 skein_init(&sk, TFC_KEY_BITS);
 659
 660                 do_stop = NO;
 661                 while (1) {
 662                         if (do_stop) break;
 663                         pblk = tmpdata;
 664                         ldone = 0;
 665                         lrem = lblock = sizeof(tmpdata);
 666                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 667 _mkragain:              lio = xread(mkfd, pblk, lrem);
 668                         if (lio == 0 && do_stop == NO) do_stop = YES;
 669                         if (lio != NOSIZE) ldone += lio;
 670                         else {
 671                                 if (errno != EIO && catch_all_errors != YES)
 672                                         xerror(NO, NO, NO, "%s", mackeyf);
 673                                 switch (error_action) {
 674                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 675                                         case TFC_ERRACT_SYNC:
 676                                         case TFC_ERRACT_LSYNC:
 677                                                 xerror(YES, NO, NO, "%s", mackeyf);
 678                                                 lio = ldone = lrem = lblock;
 679                                                 memset(tmpdata, 0, lio);
 680                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 681                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 682                                                 break;
 683                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 684                                 }
 685                         }
 686                         if (lio && lio < lrem) {
 687                                 pblk += lio;
 688                                 lrem -= lio;
 689                                 goto _mkragain;
 690                         }
 691
 692                         skein_update(&sk, tmpdata, ldone);
 693                 }
 694
 695                 skein_final(mackey, &sk);
 696
 697                 xclose(mkfd);
 698         }
 699         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 700                 memset(&getps, 0, sizeof(struct getpasswd_state));
 701                 getps.fd = getps.efd = -1;
 702                 getps.passwd = pwdask;
 703                 getps.pwlen = sizeof(pwdask)-1;
 704                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 705                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 706                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 707                 getps.flags = GETP_WAITFILL;
 708                 n = xgetpasswd(&getps);
 709                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 710                 if (n == ((size_t)-2)) xexit(1);
 711                 if (verbose) say_hint(pwdask, n, "MAC password hint");
 712                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 713         }
 714
 715
 716         if ((strlen(progname) <= 9)
 717         && ((!strcmp(progname, "sksum"))
 718         || ((!memcmp(progname, "sk", 2))
 719         && (!memcmp(progname+3, "sum", 3)
 720         || !memcmp(progname+4, "sum", 3)
 721         || !memcmp(progname+5, "sum", 3)
 722         || !memcmp(progname+6, "sum", 3)))))
 723                 do_sksum(progname, argv+optind);
 724         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 725
 726         idx = optind;
 727
 728         if (argv[idx]) {
 729                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 730                 if (!strcmp(argv[idx], "-")) kfd = 0;
 731                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 732                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 733
 734                 lio = strnlen(argv[idx], PATH_MAX);
 735                 memset(argv[idx], '*', lio);
 736
 737                 idx++;
 738         }
 739         else password = YES;
 740
 741         errno = 0;
 742         if (do_full_key == NO && tweakf) {
 743                 int twfd;
 744
 745                 if (!strcmp(tweakf, "-")) twfd = 0;
 746                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 747                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 748                 lio = ldone = xread(twfd, tweak, TF_TWEAK_SIZE);
 749                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 750                 if (ldone < TF_TWEAK_SIZE)
 751                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, TF_TWEAK_SIZE);
 752                 xclose(twfd);
 753         }
 754
 755 _nokeyfd:
 756         errno = 0;
 757         if (argv[idx]) {
 758                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 759                 else {
 760                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 761                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 762                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 763                 }
 764                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 765
 766                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 767                         if (verbose) tfc_esay("%s: disabling signature verification on "
 768                                 "requested partial decryption.", progname);
 769                         do_mac = NO;
 770                 }
 771
 772                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 773                         maxlen = tfc_fdsize(sfd);
 774                         if (maxlen == NOFSIZE)
 775                                 xerror(NO, YES, YES,
 776                                 "Cannot verify embedded MAC with non-seekable source!");
 777                         maxlen -= TF_FROM_BITS(macbits);
 778                 }
 779                 srcfname = argv[idx];
 780                 idx++;
 781         }
 782
 783         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 784                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 785
 786         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 787         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 788
 789         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 790         errno = 0;
 791         if (counter_file) {
 792                 int ctrfd;
 793
 794                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 795                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 796                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 797                 lio = xread(ctrfd, ctr, ctrsz);
 798                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 799                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 800                 xclose(ctrfd);
 801         }
 802         else if (counter_opt == TFC_CTR_HEAD) {
 803                 pblk = ctr;
 804                 ldone = 0;
 805                 lrem = lblock = ctrsz;
 806                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 807 _ctrragain:     lio = xread(sfd, pblk, lrem);
 808                 if (lio != NOSIZE) ldone += lio;
 809                 else {
 810                         if (errno != EIO && catch_all_errors != YES)
 811                                 xerror(NO, NO, NO, "%s", srcfname);
 812                         switch (error_action) {
 813                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 814                                 case TFC_ERRACT_SYNC:
 815                                 case TFC_ERRACT_LSYNC:
 816                                         xerror(YES, NO, NO, "%s", srcfname);
 817                                         lio = ldone = lrem = lblock;
 818                                         memset(ctr, 0, lio);
 819                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 820                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 821                                         break;
 822                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 823                         }
 824                 }
 825                 if (lio && lio < lrem) {
 826                         pblk += lio;
 827                         lrem -= lio;
 828                         goto _ctrragain;
 829                 }
 830                 total_processed_src += ldone;
 831         }
 832
 833 _ctrskip1:
 834         if (iseek) {
 835                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 836                         iseek += ctrsz;
 837                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 838                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 839         }
 840
 841         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 842
 843         if (verbose) tfc_esay("%s: hashing password", progname);
 844
 845         if (rawkey == TFC_RAWKEY_KEYFILE) {
 846                 tfc_yesno xtskeyset = NO;
 847
 848                 pblk = key;
 849 _xts2key:       ldone = 0;
 850                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 851                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 852 _keyragain:     lio = xread(kfd, pblk, lrem);
 853                 if (lio != NOSIZE) ldone += lio;
 854                 else {
 855                         if (errno != EIO && catch_all_errors != YES)
 856                                 xerror(NO, NO, NO, "reading key");
 857                         switch (error_action) {
 858                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 859                                 case TFC_ERRACT_SYNC:
 860                                 case TFC_ERRACT_LSYNC:
 861                                         xerror(YES, NO, NO, "reading key");
 862                                         lio = ldone = lrem = lblock;
 863                                         memset(key, 0, lio);
 864                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 865                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 866                                         break;
 867                                 default: xerror(NO, NO, NO, "reading key"); break;
 868                         }
 869                 }
 870                 if (lio && lio < lrem) {
 871                         pblk += lio;
 872                         lrem -= lio;
 873                         goto _keyragain;
 874                 }
 875                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 876
 877                 if (ctr_mode == TFC_MODE_XTS) {
 878                         if (xtskeyset == NO) {
 879                                 pblk = xtskey;
 880                                 xtskeyset = YES;
 881                                 goto _xts2key;
 882                         }
 883                 }
 884         }
 885         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 886                 tfc_yesno xtskeyset = NO;
 887
 888                 pblk = key; n = sizeof(key);
 889 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 890                 getps.fd = getps.efd = -1;
 891                 getps.passwd = (char *)pblk;
 892                 getps.pwlen = n;
 893                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 894                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 895                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 896                 getps.flags = GETP_WAITFILL;
 897                 n = xgetpasswd(&getps);
 898                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 899                 if (n == ((size_t)-2)) xexit(1);
 900                 if (verbose) say_hint(pblk, n, "Raw string key hint");
 901                 if (ctr_mode == TFC_MODE_XTS) {
 902                         if (xtskeyset == NO) {
 903                                 pblk = xtskey; n = sizeof(xtskey);
 904                                 xtskeyset = YES;
 905                                 goto _xts2keyaskstr;
 906                         }
 907                 }
 908         }
 909         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 910                 tfc_yesno xtskeyset = NO;
 911
 912                 pblk = key;
 913 _rawkey_hex_again:
 914                 memset(&getps, 0, sizeof(struct getpasswd_state));
 915                 getps.fd = getps.efd = -1;
 916                 getps.passwd = pwdask;
 917                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 918                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 919                 getps.charfilter = (show_secrets == YES) ? getps_plain_hex_filter : getps_hex_filter;
 920                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 921                 getps.flags = GETP_WAITFILL;
 922                 n = xgetpasswd(&getps);
 923                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 924                 if (n == ((size_t)-2)) xexit(1);
 925                 if (n % 2) {
 926                         tfc_esay("Please input even number of hex digits!");
 927                         goto _rawkey_hex_again;
 928                 }
 929                 hex2bin(pblk, pwdask);
 930                 memset(pwdask, 0, sizeof(pwdask));
 931                 if (verbose) say_hint(pblk, n/2, "Raw hex key hint");
 932                 if (ctr_mode == TFC_MODE_XTS) {
 933                         if (xtskeyset == NO) {
 934                                 pblk = xtskey;
 935                                 xtskeyset = YES;
 936                                 goto _rawkey_hex_again;
 937                         }
 938                 }
 939         }
 940         else if (password) {
 941 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 942                 getps.fd = getps.efd = -1;
 943                 getps.passwd = pwdask;
 944                 getps.pwlen = sizeof(pwdask)-1;
 945                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 946                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 947                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 948                 getps.flags = GETP_WAITFILL;
 949                 n = xgetpasswd(&getps);
 950                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 951                 if (n == ((size_t)-2)) xexit(1);
 952                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 953                         getps.fd = getps.efd = -1;
 954                         getps.passwd = pwdagain;
 955                         getps.pwlen = sizeof(pwdagain)-1;
 956                         getps.echo = "Enter it again: ";
 957                         getps.flags = GETP_WAITFILL;
 958                         n = xgetpasswd(&getps);
 959                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 960                         if (n == ((size_t)-2)) xexit(1);
 961                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 962                                 tfc_esay("Passwords are different, try again");
 963                                 goto _pwdagain;
 964                         }
 965                 }
 966                 if (verbose) say_hint(pwdask, n, "Password hint");
 967                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 968                 memset(pwdask, 0, sizeof(pwdask));
 969                 memset(pwdagain, 0, sizeof(pwdagain));
 970         }
 971         else {
 972                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 973                         xerror(NO, NO, YES, "hashing key");
 974         }
 975
 976         if (rawkey == NO) {
 977                 if (tfc_saltsz > 0) {
 978                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 979                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 980                 }
 981                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 982                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 983                 memset(tfc_salt, 0, TFC_MAX_SALT);
 984         }
 985
 986         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 987                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 988         }
 989
 990         if (genkeyf) {
 991                 int krfd;
 992                 tfc_yesno xtskeyset = NO;
 993
 994                 pblk = key;
 995                 if (!strcmp(genkeyf, "-")) krfd = 1;
 996                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 997                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 998 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 999                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
1000                 if (verbose && xtskeyset == NO) {
1001                         tfc_esay("%s: password hashing done", progname);
1002                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
1003                         tfc_esay("%s: Have a nice day!", progname);
1004                 }
1005
1006                 if (ctr_mode == TFC_MODE_XTS) {
1007                         if (xtskeyset == NO) {
1008                                 pblk = xtskey;
1009                                 xtskeyset = YES;
1010                                 goto _xts2genkey;
1011                         }
1012                 }
1013
1014                 fchmod(krfd, 0600);
1015                 xclose(krfd);
1016                 xexit(0);
1017         }
1018
1019         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
1020                 if (verbose) tfc_esay("%s: disabling signature verification on "
1021                         "requested partial decryption.", progname);
1022                 do_mac = NO;
1023         }
1024
1025         if (do_mac != NO) {
1026                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
1027                 if (ctr_mode < TFC_MODE_OCB) {
1028                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
1029                                 "will be slower.", progname);
1030                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
1031                         else skein_init(&sk, macbits);
1032                 }
1033         }
1034
1035         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
1036                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
1037         }
1038
1039         tf_convkey(key);
1040         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
1041         if (do_full_key == NO) {
1042                 if (!tweakf) skein(tweak, TF_NR_TWEAK_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
1043                 tf_tweak_set(key, tweak);
1044         }
1045         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
1046
1047         if (counter_opt == TFC_CTR_ZERO) memset(ctr, 0, ctrsz);
1048
1049         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
1050         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
1051         if (do_mac == TFC_MAC_JUST_VRFY2) memcpy(svctr, ctr, TF_BLOCK_SIZE);
1052
1053         if (counter_opt == TFC_CTR_SHOW) {
1054                 switch (do_outfmt) {
1055                         case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
1056                         case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
1057                         case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
1058                 }
1059         }
1060         else if (counter_opt == TFC_CTR_RAND) tfc_getrandom(ctr, ctrsz);
1061
1062 _ctrskip2:
1063         if (kfd != -1) {
1064                 xclose(kfd);
1065                 kfd = -1;
1066         }
1067         if (verbose) tfc_esay("%s: password hashing done", progname);
1068
1069         if (overwrite_source && srcfname) argv[idx] = srcfname;
1070
1071 _plain:
1072         if (argv[idx]) {
1073                 if (!strcmp(argv[idx], "-")) dfd = 1;
1074                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
1075                 if (dfd == -1) {
1076                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1077                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
1078                 }
1079                 dstfname = argv[idx];
1080                 idx++;
1081         }
1082
1083         if (oseek) {
1084                 if (lseek(dfd, oseek, SEEK_SET) == -1)
1085                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
1086         }
1087
1088         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
1089         memset(&sigact, 0, sizeof(sigact));
1090         sigact.sa_flags = SA_RESTART;
1091         sigact.sa_handler = print_crypt_status;
1092         sigaction(SIGUSR1, &sigact, NULL);
1093         sigaction(SIGALRM, &sigact, NULL);
1094         if (status_timer) setup_next_alarm(status_timer > 1000000 ? 1000000 : status_timer);
1095         sigact.sa_handler = change_status_width;
1096         sigaction(SIGQUIT, &sigact, NULL);
1097         sigact.sa_handler = change_status_timer;
1098         sigaction(SIGUSR2, &sigact, NULL);
1099         if (quiet == NO) {
1100                 sigact.sa_handler = print_crypt_status;
1101                 sigaction(SIGINT, &sigact, NULL);
1102                 sigaction(SIGTERM, &sigact, NULL);
1103                 sigaction(SIGTSTP, &sigact, NULL);
1104         }
1105         else {
1106                 sigact.sa_handler = exit_sigterm;
1107                 sigaction(SIGINT, &sigact, NULL);
1108                 sigaction(SIGTERM, &sigact, NULL);
1109                 sigact.sa_handler = handle_sigtstp;
1110                 sigaction(SIGTSTP, &sigact, NULL);
1111         }
1112         memset(&sigact, 0, sizeof(struct sigaction));
1113
1114         tfc_getcurtime(&delta_time);
1115
1116         errno = 0;
1117         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
1118                 pblk = ctr;
1119                 lio = lrem = ctrsz;
1120                 ldone = 0;
1121 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
1122                 if (lio != NOSIZE) ldone += lio;
1123                 else xerror(NO, NO, NO, "%s", dstfname);
1124                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1125                 if (lio < lrem) {
1126                         pblk += lio;
1127                         lrem -= lio;
1128                         goto _ctrwagain;
1129                 }
1130                 total_processed_dst += ldone;
1131                 delta_processed += ldone;
1132         }
1133
1134         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
1135
1136         if (do_mac == TFC_MAC_JUST_VRFY2) {
1137                 rwd = tfc_fdgetpos(sfd);
1138                 if (rwd == NOFSIZE) {
1139                         tfc_esay("%s: WARNING: input is not seekable, disabling MAC testing mode", progname);
1140                         do_mac = TFC_MAC_VRFY;
1141                 }
1142                 goto _nodecrypt_again_vrfy2;
1143
1144 _decrypt_again_vrfy2:
1145                 if (lseek(sfd, (off_t)rwd, SEEK_SET) == ((off_t)-1)) {
1146                         xerror(ignore_seek_errors, NO, YES, "MAC testing seek failed");
1147                 }
1148                 total_processed_src = rwd;
1149                 memcpy(ctr, svctr, TF_BLOCK_SIZE);
1150                 memset(svctr, 0, TF_BLOCK_SIZE);
1151         }
1152
1153 _nodecrypt_again_vrfy2:
1154         errno = 0;
1155         do_stop = NO;
1156         while (1) {
1157                 if (do_stop) break;
1158                 pblk = srcblk;
1159                 ldone = 0;
1160                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1161                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1162 _ragain:        lio = xread(sfd, pblk, lrem);
1163                 if (lio == 0) do_stop = YES;
1164                 if (lio != NOSIZE) ldone += lio;
1165                 else {
1166                         if (errno != EIO && catch_all_errors != YES)
1167                                 xerror(NO, NO, NO, "%s", srcfname);
1168                         switch (error_action) {
1169                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1170                                 case TFC_ERRACT_SYNC:
1171                                 case TFC_ERRACT_LSYNC:
1172                                         xerror(YES, NO, NO, "%s", srcfname);
1173                                         lio = ldone = lrem = lblock;
1174                                         memset(srcblk, 0, lio);
1175                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1176                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1177                                         break;
1178                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1179                         }
1180                 }
1181                 if (lio && lio < lrem) {
1182                         pblk += lio;
1183                         lrem -= lio;
1184                         goto _ragain;
1185                 }
1186                 total_processed_src += ldone;
1187
1188                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1189                         size_t orig = ldone;
1190                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1191                         if (ldone > blksize) ldone = blksize;
1192                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1193                 }
1194
1195                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1196                         skein_update(&sk, srcblk, ldone);
1197
1198                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1199                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1200                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1201                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1202                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1203                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1204                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1205                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1206                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1207                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1208                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1209                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1210                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1211                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1212
1213                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1214                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1215                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1216                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1217
1218                 else if (ctr_mode == TFC_MODE_PLAIN)
1219                         memcpy(dstblk, srcblk, ldone);
1220
1221                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1222                         skein_update(&sk, dstblk, ldone);
1223                 if (do_mac >= TFC_MAC_JUST_VRFY) goto _nowrite;
1224
1225                 pblk = dstblk;
1226                 lrem = ldone;
1227                 ldone = 0;
1228 _wagain:        lio = xwrite(dfd, pblk, lrem);
1229                 if (lio != NOSIZE) ldone += lio;
1230                 else xerror(NO, NO, NO, "%s", dstfname);
1231                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1232                 if (lio < lrem) {
1233                         pblk += lio;
1234                         lrem -= lio;
1235                         goto _wagain;
1236                 }
1237                 total_written_dst += ldone;
1238 _nowrite:       total_processed_dst += ldone;
1239                 delta_processed += ldone;
1240
1241                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) {
1242                         do_stop = YES;
1243                         break;
1244                 }
1245         }
1246
1247         errno = 0;
1248         if (do_mac >= TFC_MAC_VRFY) {
1249                 if (!do_mac_file) {
1250                         pblk = macvrfy;
1251                         ldone = 0;
1252                         lrem = lblock = TF_FROM_BITS(macbits);
1253                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1254 _macragain:             lio = xread(sfd, pblk, lrem);
1255                         if (lio != NOSIZE) ldone += lio;
1256                         else {
1257                                 if (errno != EIO && catch_all_errors != YES)
1258                                         xerror(NO, NO, NO, "%s", srcfname);
1259                                 switch (error_action) {
1260                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1261                                         case TFC_ERRACT_SYNC:
1262                                         case TFC_ERRACT_LSYNC:
1263                                                 xerror(YES, NO, NO, "%s", srcfname);
1264                                                 lio = ldone = lrem = lblock;
1265                                                 memset(macvrfy, 0, lio);
1266                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1267                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1268                                                 break;
1269                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1270                                 }
1271                         }
1272                         if (lio && lio < lrem) {
1273                                 pblk += lio;
1274                                 lrem -= lio;
1275                                 goto _macragain;
1276                         }
1277                         total_processed_src += ldone;
1278                 }
1279                 else {
1280                         int mfd;
1281
1282                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1283                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1284                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1285                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1286                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1287                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1288                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1289                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1290                                 lio = TF_FROM_BITS(macbits);
1291                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1292                         }
1293                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1294                         xclose(mfd);
1295                 }
1296
1297                 if (ldone < TF_FROM_BITS(macbits)) {
1298                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1299                                 "not verifying", progname, ldone);
1300                         exitcode = 1;
1301                         goto _shortmac;
1302                 }
1303
1304                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1305                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1306
1307                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1308                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1309                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1310                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1311                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1312                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1313
1314                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1315                         if (quiet == NO) {
1316                                 tfc_esay("%s: signature is good", progname);
1317                                 if (verbose) {
1318                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1319                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1320                                 }
1321                         }
1322                         if (do_mac == TFC_MAC_JUST_VRFY2) {
1323                                 if (verbose) tfc_esay("%s: -u: MAC signature is valid, proceeding with decrypting it again", progname);
1324                                 do_mac = TFC_MAC_DROP;
1325                                 goto _decrypt_again_vrfy2;
1326                         }
1327                 }
1328                 else {
1329                         if (quiet == NO) {
1330                                 tfc_esay("%s: signature is BAD: "
1331                                 "wrong password, key, mode, or file is not signed", progname);
1332                                 if (do_mac == TFC_MAC_JUST_VRFY2) tfc_esay("%s: -u: MAC signature is invalid, not decrypting it again", progname);
1333                         }
1334                         exitcode = 1;
1335                 }
1336
1337 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1338                 memset(macresult, 0, sizeof(macresult));
1339                 memset(tmpdata, 0, sizeof(tmpdata));
1340         }
1341
1342         else if (do_mac == TFC_MAC_SIGN) {
1343                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1344                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1345
1346                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1347                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1348                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1349                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1350                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1351                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1352                 memset(macresult, 0, sizeof(macresult));
1353
1354                 if (!do_mac_file) {
1355                         pblk = tmpdata;
1356                         lio = lrem = TF_FROM_BITS(macbits);
1357                         ldone = 0;
1358 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1359                         if (lio != NOSIZE) ldone += lio;
1360                         else xerror(NO, NO, NO, "%s", dstfname);
1361                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1362                         if (lio < lrem) {
1363                                 pblk += lio;
1364                                 lrem -= lio;
1365                                 goto _macwagain;
1366                         }
1367                         total_processed_dst += ldone;
1368                         delta_processed += ldone;
1369                 }
1370                 else {
1371                         int mfd;
1372
1373                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1374                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1375                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1376                         if (do_outfmt == TFC_OUTFMT_B64) {
1377                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1378                                 memset(tmpdata, 0, TFC_TMPSIZE);
1379                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1380                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1381                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1382                                 if (lrem) {
1383                                         tmpdata[lrem] = '\n';
1384                                         lrem++;
1385                                 }
1386                                 lio = xwrite(mfd, tmpdata, lrem);
1387                         }
1388                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1389                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1390                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1391                         xclose(mfd);
1392                 }
1393
1394                 memset(macvrfy, 0, sizeof(macvrfy));
1395                 memset(macresult, 0, sizeof(macresult));
1396                 memset(tmpdata, 0, sizeof(tmpdata));
1397         }
1398
1399         if (verbose || status_timer || (do_stop == YES && quiet == NO)) print_crypt_status(0);
1400
1401         xexit(exitcode);
1402         return -1;
1403 }