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) xerror(NO, NO, YES, "dup2(%d, 2) for %s", fd, logfile);
  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 (!strncmp(s, "logfile", 7) && *(s+7) == '=')
 336                                                 open_log(s+8);
 337                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 338                                                 s += 5;
 339                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 340                                                 if (!str_empty(stoi)) {
 341                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 342                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 343                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 344                                                         "%s: invalid block size value", s);
 345                                                 }
 346                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 347                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 348                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 349                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 350                                                         "%s: block size exceeds %u bytes",
 351                                                         s, TFC_U(TFC_BLKSIZE));
 352                                         }
 353                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 354                                                 s += 10;
 355                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 356                                                 if (!str_empty(stoi)) {
 357                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 358                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 359                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 360                                                         "%s: invalid blocks per xts block value", s);
 361                                                 }
 362                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 363                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 364                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 365                                                         s, TFC_U(TFC_BLKSIZE));
 366                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 367                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 368                                                         s, TFC_U(TFC_BLKSIZE));
 369                                         }
 370                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 371                                                 s += 6;
 372                                                 iseek = tfc_humanfsize(s, &stoi);
 373                                                 if (!str_empty(stoi)) {
 374                                                         iseek = tfc_fnamesize(s, YES);
 375                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 376                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 377                                                         "%s: invalid iseek value", s);
 378                                                 }
 379                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 380                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 381                                                         xerror(NO, YES, YES,
 382                                                                 "%s: not round to TF block size "
 383                                                                 "of %u bytes",
 384                                                                 s, TFC_U(TF_BLOCK_SIZE));
 385                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 386                                         }
 387                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 388                                                 s += 7;
 389                                                 iseek = tfc_humanfsize(s, &stoi);
 390                                                 if (!str_empty(stoi)) {
 391                                                         iseek = tfc_fnamesize(s, YES);
 392                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 393                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 394                                                                 "%s: invalid ixseek value", s);
 395                                                 }
 396                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 397                                         }
 398                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 399                                                 s += 5;
 400                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 401                                                 if (!str_empty(stoi)) {
 402                                                         iseek_blocks = tfc_fnamesize(s, YES);
 403                                                         if (iseek_blocks == NOFSIZE)
 404                                                                 xerror(NO, YES, YES,
 405                                                                 "%s: invalid ictr value", s);
 406                                                         iseek_blocks /= TF_BLOCK_SIZE;
 407                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 408                                                 }
 409                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 410                                         }
 411                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 412                                                 s += 6;
 413                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 414                                                 if (!str_empty(stoi)) {
 415                                                         iseek_blocks = tfc_fnamesize(s, YES);
 416                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 417                                                         if (iseek_blocks == NOFSIZE)
 418                                                                 xerror(NO, YES, YES,
 419                                                                 "%s: invalid ixctr value", s);
 420                                                 }
 421                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 422                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 423                                                         xerror(NO, YES, YES,
 424                                                         "%s: not round to TF block size "
 425                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 426                                                 iseek_blocks /= TF_BLOCK_SIZE;
 427                                         }
 428                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 429                                                 s += 6;
 430                                                 oseek = tfc_humanfsize(s, &stoi);
 431                                                 if (!str_empty(stoi)) {
 432                                                         oseek = tfc_fnamesize(s, YES);
 433                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 434                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 435                                                         "%s: invalid oseek value", s);
 436                                                 }
 437                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 438                                         }
 439                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 440                                                 s += 6;
 441                                                 maxlen = tfc_humanfsize(s, &stoi);
 442                                                 if (!str_empty(stoi)) {
 443                                                         maxlen = tfc_fnamesize(s, YES);
 444                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 445                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 446                                                         "%s: invalid count value", s);
 447                                                 }
 448                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 449                                                 if (counter_opt == TFC_CTR_HEAD)
 450                                                         maxlen += TF_BLOCK_SIZE;
 451                                         }
 452                                         else if (!strncmp(s, "ftrunc", 6) && *(s+6) == '=') {
 453                                                 s += 7;
 454                                                 if (!strcmp(s, "tail")) {
 455                                                         do_ftrunc = TFC_FTRUNC_TAIL;
 456                                                         ftrunc_dfd = NOFSIZE;
 457                                                 }
 458                                                 else {
 459                                                         do_ftrunc = TFC_DO_FTRUNC;
 460                                                         ftrunc_dfd = tfc_humanfsize(s, &stoi);
 461                                                         if (!str_empty(stoi)) {
 462                                                                 ftrunc_dfd = tfc_fnamesize(s, YES);
 463                                                                 ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 464                                                                 if (ftrunc_dfd == NOFSIZE) xerror(NO, YES, YES,
 465                                                                 "%s: invalid ftrunc value", s);
 466                                                         }
 467                                                         else ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 468                                                 }
 469                                         }
 470                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 471                                                 s += 5;
 472                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 473                                                 if (!str_empty(stoi)) {
 474                                                         maxkeylen = tfc_fnamesize(s, YES);
 475                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 476                                                         if (maxkeylen == NOSIZE)
 477                                                                 xerror(NO, YES, YES,
 478                                                                 "%s: invalid key length value", s);
 479                                                 }
 480                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 481                                         }
 482                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 483                                                 s += 5;
 484                                                 keyoffset = tfc_humanfsize(s, &stoi);
 485                                                 if (!str_empty(stoi)) {
 486                                                         keyoffset = tfc_fnamesize(s, YES);
 487                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 488                                                         if (keyoffset == NOFSIZE)
 489                                                                 xerror(NO, YES, YES,
 490                                                                 "%s: invalid key offset value", s);
 491                                                 }
 492                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 493                                         }
 494                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 495                                                 s += 5;
 496                                                 ctrsz = tfc_humanfsize(s, &stoi);
 497                                                 if (!str_empty(stoi)) {
 498                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 499                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 500                                                         if (ctrsz == NOSIZE)
 501                                                                 xerror(NO, YES, YES,
 502                                                                 "%s: invalid counter length value", s);
 503                                                 }
 504                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 505                                                 if (ctrsz > TF_BLOCK_SIZE)
 506                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 507                                         }
 508                                         else xerror(NO, YES, YES, "invalid option %s", s);
 509                                 }
 510                                 break;
 511                         case 'S':
 512                                 do_mac = TFC_MAC_SIGN;
 513                                 if (strcasecmp(optarg, "mac") != 0)
 514                                         do_mac_file = optarg;
 515                                 break;
 516                         case 'M':
 517                                 do_mac = TFC_MAC_VRFY;
 518                                 if (!strcasecmp(optarg, "drop"))
 519                                         do_mac = TFC_MAC_DROP;
 520                                 else if (strcasecmp(optarg, "mac") != 0)
 521                                         do_mac_file = optarg;
 522                                 break;
 523                         case 'm':
 524                         case 'u':
 525                                 if (do_mac != TFC_MAC_VRFY)
 526                                         xerror(NO, YES, YES, "signature source was not specified");
 527                                 do_mac = TFC_MAC_JUST_VRFY;
 528                                 if (c == 'u') do_mac = TFC_MAC_JUST_VRFY2;
 529                                 break;
 530                         case 'R':
 531                         case 'Z':
 532                                 if (maxlen != NOFSIZE) {
 533                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 534                                         else genrandom_nr_bytes = maxlen;
 535                                 }
 536                                 else {
 537                                         tfc_fsize t;
 538                                         if (!strcasecmp(optarg, "cbs"))
 539                                                 t = TF_BLOCK_SIZE;
 540                                         else if (!strcasecmp(optarg, "ks"))
 541                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 542                                         else if (!strcasecmp(optarg, "xks"))
 543                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 544                                         else if (!strcasecmp(optarg, "iobs"))
 545                                                 t = blksize;
 546                                         else {
 547                                                 t = tfc_humanfsize(optarg, &stoi);
 548                                                 if (!str_empty(stoi)) {
 549                                                         t = tfc_fnamesize(optarg, NO);
 550                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 551                                                 }
 552                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 553                                         }
 554                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 555                                         else genrandom_nr_bytes = maxlen = t;
 556                                 }
 557                                 break;
 558                         case 'a':
 559                                 do_preserve_time = YES;
 560                                 break;
 561                         case 'A':
 562                                 do_outfmt = TFC_OUTFMT_B64;
 563                                 break;
 564                         case 'W':
 565                                 do_outfmt = TFC_OUTFMT_RAW;
 566                                 break;
 567                         case 'H':
 568                                 do_outfmt = TFC_OUTFMT_HEX;
 569                                 break;
 570                         case 'q':
 571                                 quiet = YES;
 572                                 verbose = NO;
 573                                 do_full_hexdump = NO;
 574                                 status_timer = 0;
 575                                 break;
 576                         case 'v':
 577                                 verbose = YES;
 578                                 break;
 579                         case 'V':
 580                                 td = strtod(optarg, &stoi);
 581                                 status_timer = TFC_DTOUSECS(td);
 582                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 583                                 break;
 584                         default:
 585                                 usage();
 586                                 break;
 587                 }
 588         }
 589
 590         if (!strcmp(progname, "tfbench")) {
 591                 if (!*(argv+optind)) usage();
 592
 593                 td = strtod(*(argv+optind), &stoi);
 594                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 595                         xerror(NO, YES, YES,
 596                         "%s: invalid benchmark time in seconds", *(argv+optind));
 597                 bench_timer = TFC_DTOUSECS(td);
 598                 do_benchmark(bench_timer, td);
 599         }
 600         if (genrandom_nr_bytes) {
 601                 ctr_mode = TFC_MODE_STREAM;
 602                 do_edcrypt = TFC_DO_ENCRYPT;
 603                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 604         }
 605         if (genzero_nr_bytes) {
 606                 ctr_mode = TFC_MODE_PLAIN;
 607                 do_edcrypt = TFC_DO_PLAIN;
 608                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 609         }
 610
 611         if (rawkey && password)
 612                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 613         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 614                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 615         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 616                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 617         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 618                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 619         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 620                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 621         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 622                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 623         if (ctr_mode == TFC_MODE_PLAIN
 624         && (do_edcrypt || do_mac || rawkey
 625         || mackey_opt || counter_opt || counter_file))
 626                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 627
 628         errno = 0;
 629         do_stop = NO;
 630
 631         if (saltf) {
 632                 int saltfd;
 633
 634                 memset(tfc_salt, 0, TFC_MAX_SALT);
 635                 tfc_saltsz = 0;
 636                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 637
 638                 if (!strcmp(saltf, "-")) saltfd = 0;
 639                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 640                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 641                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 642                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 643                 tfc_saltsz = lio;
 644                 xclose(saltfd);
 645         }
 646
 647 _nosalt:
 648         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 649                 int mkfd = -1;
 650                 tfc_yesno do_stop;
 651
 652                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 653                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 654                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 655
 656                 skein_init(&sk, TFC_KEY_BITS);
 657
 658                 do_stop = NO;
 659                 while (1) {
 660                         if (do_stop) break;
 661                         pblk = tmpdata;
 662                         ldone = 0;
 663                         lrem = lblock = sizeof(tmpdata);
 664                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 665 _mkragain:              lio = xread(mkfd, pblk, lrem);
 666                         if (lio == 0 && do_stop == NO) do_stop = YES;
 667                         if (lio != NOSIZE) ldone += lio;
 668                         else {
 669                                 if (errno != EIO && catch_all_errors != YES)
 670                                         xerror(NO, NO, NO, "%s", mackeyf);
 671                                 switch (error_action) {
 672                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 673                                         case TFC_ERRACT_SYNC:
 674                                         case TFC_ERRACT_LSYNC:
 675                                                 xerror(YES, NO, NO, "%s", mackeyf);
 676                                                 lio = ldone = lrem = lblock;
 677                                                 memset(tmpdata, 0, lio);
 678                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 679                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 680                                                 break;
 681                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 682                                 }
 683                         }
 684                         if (lio && lio < lrem) {
 685                                 pblk += lio;
 686                                 lrem -= lio;
 687                                 goto _mkragain;
 688                         }
 689
 690                         skein_update(&sk, tmpdata, ldone);
 691                 }
 692
 693                 skein_final(mackey, &sk);
 694
 695                 xclose(mkfd);
 696         }
 697         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 698                 memset(&getps, 0, sizeof(struct getpasswd_state));
 699                 getps.fd = getps.efd = -1;
 700                 getps.passwd = pwdask;
 701                 getps.pwlen = sizeof(pwdask)-1;
 702                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 703                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 704                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 705                 getps.flags = GETP_WAITFILL;
 706                 n = xgetpasswd(&getps);
 707                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 708                 if (n == ((size_t)-2)) xexit(1);
 709                 if (verbose) say_hint(pwdask, n, "MAC password hint");
 710                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 711         }
 712
 713
 714         if ((strlen(progname) <= 9)
 715         && ((!strcmp(progname, "sksum"))
 716         || ((!memcmp(progname, "sk", 2))
 717         && (!memcmp(progname+3, "sum", 3)
 718         || !memcmp(progname+4, "sum", 3)
 719         || !memcmp(progname+5, "sum", 3)
 720         || !memcmp(progname+6, "sum", 3)))))
 721                 do_sksum(progname, argv+optind);
 722         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 723
 724         idx = optind;
 725
 726         if (argv[idx]) {
 727                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 728                 if (!strcmp(argv[idx], "-")) kfd = 0;
 729                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 730                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 731
 732                 lio = strnlen(argv[idx], PATH_MAX);
 733                 memset(argv[idx], '*', lio);
 734
 735                 idx++;
 736         }
 737         else password = YES;
 738
 739         errno = 0;
 740         if (do_full_key == NO && tweakf) {
 741                 int twfd;
 742
 743                 if (!strcmp(tweakf, "-")) twfd = 0;
 744                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 745                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 746                 lio = ldone = xread(twfd, tweak, TF_TWEAK_SIZE);
 747                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 748                 if (ldone < TF_TWEAK_SIZE)
 749                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, TF_TWEAK_SIZE);
 750                 xclose(twfd);
 751         }
 752
 753 _nokeyfd:
 754         errno = 0;
 755         if (argv[idx]) {
 756                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 757                 else {
 758                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 759                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 760                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 761                 }
 762                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 763
 764                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 765                         if (verbose) tfc_esay("%s: disabling signature verification on "
 766                                 "requested partial decryption.", progname);
 767                         do_mac = NO;
 768                 }
 769
 770                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 771                         maxlen = tfc_fdsize(sfd);
 772                         if (maxlen == NOFSIZE)
 773                                 xerror(NO, YES, YES,
 774                                 "Cannot verify embedded MAC with non-seekable source!");
 775                         maxlen -= TF_FROM_BITS(macbits);
 776                 }
 777                 srcfname = argv[idx];
 778                 idx++;
 779         }
 780
 781         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 782                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 783
 784         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 785         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 786
 787         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 788         errno = 0;
 789         if (counter_file) {
 790                 int ctrfd;
 791
 792                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 793                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 794                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 795                 lio = xread(ctrfd, ctr, ctrsz);
 796                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 797                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 798                 xclose(ctrfd);
 799         }
 800         else if (counter_opt == TFC_CTR_HEAD) {
 801                 pblk = ctr;
 802                 ldone = 0;
 803                 lrem = lblock = ctrsz;
 804                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 805 _ctrragain:     lio = xread(sfd, pblk, lrem);
 806                 if (lio != NOSIZE) ldone += lio;
 807                 else {
 808                         if (errno != EIO && catch_all_errors != YES)
 809                                 xerror(NO, NO, NO, "%s", srcfname);
 810                         switch (error_action) {
 811                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 812                                 case TFC_ERRACT_SYNC:
 813                                 case TFC_ERRACT_LSYNC:
 814                                         xerror(YES, NO, NO, "%s", srcfname);
 815                                         lio = ldone = lrem = lblock;
 816                                         memset(ctr, 0, lio);
 817                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 818                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 819                                         break;
 820                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 821                         }
 822                 }
 823                 if (lio && lio < lrem) {
 824                         pblk += lio;
 825                         lrem -= lio;
 826                         goto _ctrragain;
 827                 }
 828                 total_processed_src += ldone;
 829         }
 830
 831 _ctrskip1:
 832         if (iseek) {
 833                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 834                         iseek += ctrsz;
 835                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 836                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 837         }
 838
 839         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 840
 841         if (verbose) tfc_esay("%s: hashing password", progname);
 842
 843         if (rawkey == TFC_RAWKEY_KEYFILE) {
 844                 tfc_yesno xtskeyset = NO;
 845
 846                 pblk = key;
 847 _xts2key:       ldone = 0;
 848                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 849                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 850 _keyragain:     lio = xread(kfd, pblk, lrem);
 851                 if (lio != NOSIZE) ldone += lio;
 852                 else {
 853                         if (errno != EIO && catch_all_errors != YES)
 854                                 xerror(NO, NO, NO, "reading key");
 855                         switch (error_action) {
 856                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 857                                 case TFC_ERRACT_SYNC:
 858                                 case TFC_ERRACT_LSYNC:
 859                                         xerror(YES, NO, NO, "reading key");
 860                                         lio = ldone = lrem = lblock;
 861                                         memset(key, 0, lio);
 862                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 863                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 864                                         break;
 865                                 default: xerror(NO, NO, NO, "reading key"); break;
 866                         }
 867                 }
 868                 if (lio && lio < lrem) {
 869                         pblk += lio;
 870                         lrem -= lio;
 871                         goto _keyragain;
 872                 }
 873                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 874
 875                 if (ctr_mode == TFC_MODE_XTS) {
 876                         if (xtskeyset == NO) {
 877                                 pblk = xtskey;
 878                                 xtskeyset = YES;
 879                                 goto _xts2key;
 880                         }
 881                 }
 882         }
 883         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 884                 tfc_yesno xtskeyset = NO;
 885
 886                 pblk = key; n = sizeof(key);
 887 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 888                 getps.fd = getps.efd = -1;
 889                 getps.passwd = (char *)pblk;
 890                 getps.pwlen = n;
 891                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 892                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 893                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 894                 getps.flags = GETP_WAITFILL;
 895                 n = xgetpasswd(&getps);
 896                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 897                 if (n == ((size_t)-2)) xexit(1);
 898                 if (verbose) say_hint(pblk, n, "Raw string key hint");
 899                 if (ctr_mode == TFC_MODE_XTS) {
 900                         if (xtskeyset == NO) {
 901                                 pblk = xtskey; n = sizeof(xtskey);
 902                                 xtskeyset = YES;
 903                                 goto _xts2keyaskstr;
 904                         }
 905                 }
 906         }
 907         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 908                 tfc_yesno xtskeyset = NO;
 909
 910                 pblk = key;
 911 _rawkey_hex_again:
 912                 memset(&getps, 0, sizeof(struct getpasswd_state));
 913                 getps.fd = getps.efd = -1;
 914                 getps.passwd = pwdask;
 915                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 916                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 917                 getps.charfilter = (show_secrets == YES) ? getps_plain_hex_filter : getps_hex_filter;
 918                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 919                 getps.flags = GETP_WAITFILL;
 920                 n = xgetpasswd(&getps);
 921                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 922                 if (n == ((size_t)-2)) xexit(1);
 923                 if (n % 2) {
 924                         tfc_esay("Please input even number of hex digits!");
 925                         goto _rawkey_hex_again;
 926                 }
 927                 hex2bin(pblk, pwdask);
 928                 memset(pwdask, 0, sizeof(pwdask));
 929                 if (verbose) say_hint(pblk, n/2, "Raw hex key hint");
 930                 if (ctr_mode == TFC_MODE_XTS) {
 931                         if (xtskeyset == NO) {
 932                                 pblk = xtskey;
 933                                 xtskeyset = YES;
 934                                 goto _rawkey_hex_again;
 935                         }
 936                 }
 937         }
 938         else if (password) {
 939 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 940                 getps.fd = getps.efd = -1;
 941                 getps.passwd = pwdask;
 942                 getps.pwlen = sizeof(pwdask)-1;
 943                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 944                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 945                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 946                 getps.flags = GETP_WAITFILL;
 947                 n = xgetpasswd(&getps);
 948                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 949                 if (n == ((size_t)-2)) xexit(1);
 950                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 951                         getps.fd = getps.efd = -1;
 952                         getps.passwd = pwdagain;
 953                         getps.pwlen = sizeof(pwdagain)-1;
 954                         getps.echo = "Enter it again: ";
 955                         getps.flags = GETP_WAITFILL;
 956                         n = xgetpasswd(&getps);
 957                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 958                         if (n == ((size_t)-2)) xexit(1);
 959                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 960                                 tfc_esay("Passwords are different, try again");
 961                                 goto _pwdagain;
 962                         }
 963                 }
 964                 if (verbose) say_hint(pwdask, n, "Password hint");
 965                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 966                 memset(pwdask, 0, sizeof(pwdask));
 967                 memset(pwdagain, 0, sizeof(pwdagain));
 968         }
 969         else {
 970                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 971                         xerror(NO, NO, YES, "hashing key");
 972         }
 973
 974         if (rawkey == NO) {
 975                 if (tfc_saltsz > 0) {
 976                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 977                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 978                 }
 979                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 980                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 981                 memset(tfc_salt, 0, TFC_MAX_SALT);
 982         }
 983
 984         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 985                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 986         }
 987
 988         if (genkeyf) {
 989                 int krfd;
 990                 tfc_yesno xtskeyset = NO;
 991
 992                 pblk = key;
 993                 if (!strcmp(genkeyf, "-")) krfd = 1;
 994                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 995                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 996 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 997                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 998                 if (verbose && xtskeyset == NO) {
 999                         tfc_esay("%s: password hashing done", progname);
1000                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
1001                         tfc_esay("%s: Have a nice day!", progname);
1002                 }
1003
1004                 if (ctr_mode == TFC_MODE_XTS) {
1005                         if (xtskeyset == NO) {
1006                                 pblk = xtskey;
1007                                 xtskeyset = YES;
1008                                 goto _xts2genkey;
1009                         }
1010                 }
1011
1012                 fchmod(krfd, 0600);
1013                 xclose(krfd);
1014                 xexit(0);
1015         }
1016
1017         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
1018                 if (verbose) tfc_esay("%s: disabling signature verification on "
1019                         "requested partial decryption.", progname);
1020                 do_mac = NO;
1021         }
1022
1023         if (do_mac != NO) {
1024                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
1025                 if (ctr_mode < TFC_MODE_OCB) {
1026                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
1027                                 "will be slower.", progname);
1028                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
1029                         else skein_init(&sk, macbits);
1030                 }
1031         }
1032
1033         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
1034                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
1035         }
1036
1037         tf_convkey(key);
1038         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
1039         if (do_full_key == NO) {
1040                 if (!tweakf) skein(tweak, TF_NR_TWEAK_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
1041                 tf_tweak_set(key, tweak);
1042         }
1043         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
1044
1045         if (counter_opt == TFC_CTR_ZERO) memset(ctr, 0, ctrsz);
1046
1047         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
1048         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
1049         if (do_mac == TFC_MAC_JUST_VRFY2) memcpy(svctr, ctr, TF_BLOCK_SIZE);
1050
1051         if (counter_opt == TFC_CTR_SHOW) {
1052                 switch (do_outfmt) {
1053                         case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
1054                         case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
1055                         case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
1056                 }
1057         }
1058         else if (counter_opt == TFC_CTR_RAND) tfc_getrandom(ctr, ctrsz);
1059
1060 _ctrskip2:
1061         if (kfd != -1) {
1062                 xclose(kfd);
1063                 kfd = -1;
1064         }
1065         if (verbose) tfc_esay("%s: password hashing done", progname);
1066
1067         if (overwrite_source && srcfname) argv[idx] = srcfname;
1068
1069 _plain:
1070         if (argv[idx]) {
1071                 if (!strcmp(argv[idx], "-")) dfd = 1;
1072                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
1073                 if (dfd == -1) {
1074                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1075                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
1076                 }
1077                 dstfname = argv[idx];
1078                 idx++;
1079         }
1080
1081         if (oseek) {
1082                 if (lseek(dfd, oseek, SEEK_SET) == -1)
1083                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
1084         }
1085
1086         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
1087         memset(&sigact, 0, sizeof(sigact));
1088         sigact.sa_flags = SA_RESTART;
1089         sigact.sa_handler = print_crypt_status;
1090         sigaction(SIGUSR1, &sigact, NULL);
1091         sigaction(SIGALRM, &sigact, NULL);
1092         if (status_timer) setup_next_alarm(status_timer);
1093         sigact.sa_handler = change_status_width;
1094         sigaction(SIGQUIT, &sigact, NULL);
1095         sigact.sa_handler = change_status_timer;
1096         sigaction(SIGUSR2, &sigact, NULL);
1097         if (quiet == NO) {
1098                 sigact.sa_handler = print_crypt_status;
1099                 sigaction(SIGINT, &sigact, NULL);
1100                 sigaction(SIGTERM, &sigact, NULL);
1101                 sigaction(SIGTSTP, &sigact, NULL);
1102         }
1103         else {
1104                 sigact.sa_handler = exit_sigterm;
1105                 sigaction(SIGINT, &sigact, NULL);
1106                 sigaction(SIGTERM, &sigact, NULL);
1107                 sigact.sa_handler = handle_sigtstp;
1108                 sigaction(SIGTSTP, &sigact, NULL);
1109         }
1110         memset(&sigact, 0, sizeof(struct sigaction));
1111
1112         tfc_getcurtime(&delta_time);
1113
1114         errno = 0;
1115         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
1116                 pblk = ctr;
1117                 lio = lrem = ctrsz;
1118                 ldone = 0;
1119 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
1120                 if (lio != NOSIZE) ldone += lio;
1121                 else xerror(NO, NO, NO, "%s", dstfname);
1122                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1123                 if (lio < lrem) {
1124                         pblk += lio;
1125                         lrem -= lio;
1126                         goto _ctrwagain;
1127                 }
1128                 total_processed_dst += ldone;
1129                 delta_processed += ldone;
1130         }
1131
1132         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
1133
1134         if (do_mac == TFC_MAC_JUST_VRFY2) {
1135                 rwd = tfc_fdgetpos(sfd);
1136                 if (rwd == NOFSIZE) {
1137                         tfc_esay("%s: WARNING: input is not seekable, disabling MAC testing mode", progname);
1138                         do_mac = TFC_MAC_VRFY;
1139                 }
1140                 goto _nodecrypt_again_vrfy2;
1141
1142 _decrypt_again_vrfy2:
1143                 if (lseek(sfd, (off_t)rwd, SEEK_SET) == ((off_t)-1)) {
1144                         xerror(ignore_seek_errors, NO, YES, "MAC testing seek failed");
1145                 }
1146                 total_processed_src = rwd;
1147                 memcpy(ctr, svctr, TF_BLOCK_SIZE);
1148                 memset(svctr, 0, TF_BLOCK_SIZE);
1149         }
1150
1151 _nodecrypt_again_vrfy2:
1152         errno = 0;
1153         do_stop = NO;
1154         while (1) {
1155                 if (do_stop) break;
1156                 pblk = srcblk;
1157                 ldone = 0;
1158                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1159                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1160 _ragain:        lio = xread(sfd, pblk, lrem);
1161                 if (lio == 0) do_stop = YES;
1162                 if (lio != NOSIZE) ldone += lio;
1163                 else {
1164                         if (errno != EIO && catch_all_errors != YES)
1165                                 xerror(NO, NO, NO, "%s", srcfname);
1166                         switch (error_action) {
1167                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1168                                 case TFC_ERRACT_SYNC:
1169                                 case TFC_ERRACT_LSYNC:
1170                                         xerror(YES, NO, NO, "%s", srcfname);
1171                                         lio = ldone = lrem = lblock;
1172                                         memset(srcblk, 0, lio);
1173                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1174                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1175                                         break;
1176                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1177                         }
1178                 }
1179                 if (lio && lio < lrem) {
1180                         pblk += lio;
1181                         lrem -= lio;
1182                         goto _ragain;
1183                 }
1184                 total_processed_src += ldone;
1185
1186                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1187                         size_t orig = ldone;
1188                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1189                         if (ldone > blksize) ldone = blksize;
1190                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1191                 }
1192
1193                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1194                         skein_update(&sk, srcblk, ldone);
1195
1196                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1197                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1198                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1199                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1200                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1201                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1202                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1203                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1204                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1205                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1206                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1207                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1208                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1209                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1210
1211                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1212                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1213                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1214                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1215
1216                 else if (ctr_mode == TFC_MODE_PLAIN)
1217                         memcpy(dstblk, srcblk, ldone);
1218
1219                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1220                         skein_update(&sk, dstblk, ldone);
1221                 if (do_mac >= TFC_MAC_JUST_VRFY) goto _nowrite;
1222
1223                 pblk = dstblk;
1224                 lrem = ldone;
1225                 ldone = 0;
1226 _wagain:        lio = xwrite(dfd, pblk, lrem);
1227                 if (lio != NOSIZE) ldone += lio;
1228                 else xerror(NO, NO, NO, "%s", dstfname);
1229                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1230                 if (lio < lrem) {
1231                         pblk += lio;
1232                         lrem -= lio;
1233                         goto _wagain;
1234                 }
1235                 total_written_dst += ldone;
1236 _nowrite:       total_processed_dst += ldone;
1237                 delta_processed += ldone;
1238
1239                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) {
1240                         do_stop = YES;
1241                         break;
1242                 }
1243         }
1244
1245         errno = 0;
1246         if (do_mac >= TFC_MAC_VRFY) {
1247                 if (!do_mac_file) {
1248                         pblk = macvrfy;
1249                         ldone = 0;
1250                         lrem = lblock = TF_FROM_BITS(macbits);
1251                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1252 _macragain:             lio = xread(sfd, pblk, lrem);
1253                         if (lio != NOSIZE) ldone += lio;
1254                         else {
1255                                 if (errno != EIO && catch_all_errors != YES)
1256                                         xerror(NO, NO, NO, "%s", srcfname);
1257                                 switch (error_action) {
1258                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1259                                         case TFC_ERRACT_SYNC:
1260                                         case TFC_ERRACT_LSYNC:
1261                                                 xerror(YES, NO, NO, "%s", srcfname);
1262                                                 lio = ldone = lrem = lblock;
1263                                                 memset(macvrfy, 0, lio);
1264                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1265                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1266                                                 break;
1267                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1268                                 }
1269                         }
1270                         if (lio && lio < lrem) {
1271                                 pblk += lio;
1272                                 lrem -= lio;
1273                                 goto _macragain;
1274                         }
1275                         total_processed_src += ldone;
1276                 }
1277                 else {
1278                         int mfd;
1279
1280                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1281                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1282                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1283                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1284                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1285                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1286                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1287                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1288                                 lio = TF_FROM_BITS(macbits);
1289                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1290                         }
1291                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1292                         xclose(mfd);
1293                 }
1294
1295                 if (ldone < TF_FROM_BITS(macbits)) {
1296                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1297                                 "not verifying", progname, ldone);
1298                         exitcode = 1;
1299                         goto _shortmac;
1300                 }
1301
1302                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1303                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1304
1305                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1306                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1307                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1308                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1309                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1310                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1311
1312                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1313                         if (quiet == NO) {
1314                                 tfc_esay("%s: signature is good", progname);
1315                                 if (verbose) {
1316                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1317                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1318                                 }
1319                         }
1320                         if (do_mac == TFC_MAC_JUST_VRFY2) {
1321                                 if (verbose) tfc_esay("%s: -u: MAC signature is valid, proceeding with decrypting it again", progname);
1322                                 do_mac = TFC_MAC_DROP;
1323                                 goto _decrypt_again_vrfy2;
1324                         }
1325                 }
1326                 else {
1327                         if (quiet == NO) {
1328                                 tfc_esay("%s: signature is BAD: "
1329                                 "wrong password, key, mode, or file is not signed", progname);
1330                                 if (do_mac == TFC_MAC_JUST_VRFY2) tfc_esay("%s: -u: MAC signature is invalid, not decrypting it again", progname);
1331                         }
1332                         exitcode = 1;
1333                 }
1334
1335 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1336                 memset(macresult, 0, sizeof(macresult));
1337                 memset(tmpdata, 0, sizeof(tmpdata));
1338         }
1339
1340         else if (do_mac == TFC_MAC_SIGN) {
1341                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1342                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1343
1344                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1345                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1346                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1347                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1348                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1349                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1350                 memset(macresult, 0, sizeof(macresult));
1351
1352                 if (!do_mac_file) {
1353                         pblk = tmpdata;
1354                         lio = lrem = TF_FROM_BITS(macbits);
1355                         ldone = 0;
1356 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1357                         if (lio != NOSIZE) ldone += lio;
1358                         else xerror(NO, NO, NO, "%s", dstfname);
1359                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1360                         if (lio < lrem) {
1361                                 pblk += lio;
1362                                 lrem -= lio;
1363                                 goto _macwagain;
1364                         }
1365                         total_processed_dst += ldone;
1366                         delta_processed += ldone;
1367                 }
1368                 else {
1369                         int mfd;
1370
1371                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1372                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1373                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1374                         if (do_outfmt == TFC_OUTFMT_B64) {
1375                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1376                                 memset(tmpdata, 0, TFC_TMPSIZE);
1377                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1378                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1379                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1380                                 if (lrem) {
1381                                         tmpdata[lrem] = '\n';
1382                                         lrem++;
1383                                 }
1384                                 lio = xwrite(mfd, tmpdata, lrem);
1385                         }
1386                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1387                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1388                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1389                         xclose(mfd);
1390                 }
1391
1392                 memset(macvrfy, 0, sizeof(macvrfy));
1393                 memset(macresult, 0, sizeof(macresult));
1394                 memset(tmpdata, 0, sizeof(tmpdata));
1395         }
1396
1397         if (verbose || status_timer || (do_stop == YES && quiet == NO)) print_crypt_status(0);
1398
1399         xexit(exitcode);
1400         return -1;
1401 }