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