tfcrypt.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
   6  *
   7  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  24  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "tfcrypt.h"
  30
  31 static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
  32 {
  33         if (chr == '\x03') {
  34                 getps->retn = ((size_t)-2);
  35                 return 6;
  36         }
  37         return 1;
  38 }
  39
  40 static int getps_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  41 {
  42         if (chr == '\x03') {
  43                 getps->retn = ((size_t)-2);
  44                 return 6;
  45         }
  46         if (chr >= '0' && chr <= '9') return 1;
  47         if (chr >= 'a' && chr <= 'f') return 1;
  48         if (chr >= 'A' && chr <= 'F') return 1;
  49         if (chr == '\x7f' || chr == '\x08'
  50         || chr == '\x15' || chr == '\x17') return 1;
  51         return 0;
  52 }
  53
  54 static inline int isctrlchr(int c)
  55 {
  56         if (c == 9) return 0;
  57         if (c >= 0 && c <= 31) return 1;
  58         if (c == 127) return 1;
  59         return 0;
  60 }
  61
  62 static int getps_plain_filter(struct getpasswd_state *getps, char chr, size_t pos)
  63 {
  64         int x;
  65
  66         x = getps_filter(getps, chr, pos);
  67         if (x != 1) return x;
  68
  69         if (pos < getps->pwlen && !isctrlchr(chr))
  70                 write(getps->efd, &chr, sizeof(char));
  71         return 1;
  72 }
  73
  74 static int getps_plain_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
  75 {
  76         int x;
  77
  78         x = getps_hex_filter(getps, chr, pos);
  79         if (x != 1) return x;
  80
  81         if (pos < getps->pwlen && !isctrlchr(chr))
  82                 write(getps->efd, &chr, sizeof(char));
  83         return 1;
  84 }
  85
  86 int main(int argc, char **argv)
  87 {
  88         int c;
  89         double td;
  90         char *s, *d, *t, *stoi;
  91         size_t x, n;
  92
  93         progname = basename(argv[0]);
  94
  95         if (!isatty(2)) do_statline_dynamic = NO;
  96
  97         s = (char *)srcblk;
  98         d = getenv("HOME");
  99         if (!d) d = "";
 100         n = PATH_MAX > sizeof(srcblk) ? sizeof(srcblk) : PATH_MAX;
 101         if (xstrlcpy(s, d, n) >= n) goto _baddfname;
 102         if (xstrlcat(s, "/.tfcrypt.defs", n) >= n) goto _baddfname;
 103         read_defaults(s, YES);
 104 _baddfname:
 105         memset(s, 0, n);
 106
 107         opterr = 0;
 108         while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:Pkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
 109                 switch (c) {
 110                         case 'L':
 111                                 read_defaults(optarg, NO);
 112                                 break;
 113                         case 's':
 114                                 saltf = optarg;
 115                                 break;
 116                         case 'r':
 117                                 randsource = optarg;
 118                                 break;
 119                         case 'c':
 120                                 if (!strcasecmp(optarg, "show"))
 121                                         counter_opt = TFC_CTR_SHOW;
 122                                 else if (!strcasecmp(optarg, "head"))
 123                                         counter_opt = TFC_CTR_HEAD;
 124                                 else if (!strcasecmp(optarg, "rand"))
 125                                         counter_opt = TFC_CTR_RAND;
 126                                 else if (!strcasecmp(optarg, "zero"))
 127                                         counter_opt = TFC_CTR_ZERO;
 128                                 else counter_file = sksum_hashlist_file = optarg;
 129                                 break;
 130                         case 'C':
 131                                 if (!strcasecmp(optarg, "ctr"))
 132                                         ctr_mode = TFC_MODE_CTR;
 133                                 else if (!strcasecmp(optarg, "stream"))
 134                                         ctr_mode = TFC_MODE_STREAM;
 135                                 else if (!strcasecmp(optarg, "cbc"))
 136                                         ctr_mode = TFC_MODE_CBC;
 137                                 else if (!strcasecmp(optarg, "ecb"))
 138                                         ctr_mode = TFC_MODE_ECB;
 139                                 else if (!strcasecmp(optarg, "xts"))
 140                                         ctr_mode = TFC_MODE_XTS;
 141                                 else if (!strcasecmp(optarg, "ocb"))
 142                                         ctr_mode = TFC_MODE_OCB;
 143                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
 144                                 break;
 145                         case 'P':
 146                                 do_edcrypt = TFC_DO_PLAIN;
 147                                 password = YES;
 148                                 ctr_mode = TFC_MODE_PLAIN;
 149                                 break;
 150                         case 'e':
 151                                 do_edcrypt = TFC_DO_ENCRYPT;
 152                                 break;
 153                         case 'd':
 154                                 do_edcrypt = TFC_DO_DECRYPT;
 155                                 break;
 156                         case 'D':
 157                                 macbits = strtoul(optarg, &stoi, 10);
 158                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 159                                 || macbits > TF_MAX_BITS || macbits % 8)
 160                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 161                                 break;
 162                         case 'n':
 163                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 164                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 165                                 break;
 166                         case 'U':
 167                                 if (!strcasecmp(optarg, "key"))
 168                                         mackey_opt = TFC_MACKEY_RAWKEY;
 169                                 else if (!strcasecmp(optarg, "pwd"))
 170                                         mackey_opt = TFC_MACKEY_PASSWORD;
 171                                 else {
 172                                         mackey_opt = TFC_MACKEY_FILE;
 173                                         mackeyf = optarg;
 174                                 }
 175                                 break;
 176                         case 'p':
 177                                 password = YES;
 178                                 break;
 179                         case 'k':
 180                                 rawkey = TFC_RAWKEY_KEYFILE;
 181                                 break;
 182                         case 'z':
 183                                 rawkey = TFC_RAWKEY_ASKSTR;
 184                                 break;
 185                         case 'x':
 186                                 rawkey = TFC_RAWKEY_ASKHEX;
 187                                 break;
 188                         case 'K':
 189                                 verbose = YES;
 190                                 genkeyf = optarg;
 191                                 break;
 192                         case 't':
 193                                 tweakf = optarg;
 194                                 do_full_key = NO;
 195                                 break;
 196                         case 'l':
 197                                 if (maxlen != NOFSIZE) break;
 198
 199                                 maxlen = tfc_humanfsize(optarg, &stoi);
 200                                 if (!str_empty(stoi)) {
 201                                         maxlen = tfc_fnamesize(optarg, YES);
 202                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 203                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 204                                         "%s: invalid count value", optarg);
 205                                 }
 206                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 207                                 if (counter_opt == TFC_CTR_HEAD)
 208                                         maxlen += TF_BLOCK_SIZE;
 209                                 break;
 210                         case 'w':
 211                                 overwrite_source = YES;
 212                                 break;
 213                         case 'E':
 214                                 if (!strcmp(optarg, "xall")) {
 215                                         catch_all_errors = YES;
 216                                         break;
 217                                 }
 218                                 if (!strcmp(optarg, "xseek")) {
 219                                         ignore_seek_errors = YES;
 220                                         break;
 221                                 }
 222                                 if (!strcmp(optarg, "exit"))
 223                                         error_action = TFC_ERRACT_EXIT;
 224                                 else if (!strncmp(optarg, "cont", 4))
 225                                         error_action = TFC_ERRACT_CONT;
 226                                 else if (!strcmp(optarg, "sync"))
 227                                         error_action = TFC_ERRACT_SYNC;
 228                                 else if (!strcmp(optarg, "lsync"))
 229                                         error_action = TFC_ERRACT_LSYNC;
 230                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 231                                 break;
 232                         case 'O':
 233                                 s = d = optarg; t = NULL;
 234                                 while ((s = strtok_r(d, ",", &t))) {
 235                                         if (d) d = NULL;
 236                                         if (!strcmp(s, "sync"))
 237                                                 write_flags |= O_SYNC;
 238                                         else if (!strcmp(s, "trunc"))
 239                                                 write_flags |= O_TRUNC;
 240                                         else if (!strcmp(s, "fsync"))
 241                                                 do_fsync = YES;
 242                                         else if (!strcmp(s, "pad"))
 243                                                 do_pad = YES;
 244                                         else if (!strcmp(s, "xtime"))
 245                                                 do_preserve_time = YES;
 246                                         else if (!strcmp(s, "gibsize"))
 247                                                 do_stats_in_gibs = YES;
 248                                         else if (!strcmp(s, "plainstats"))
 249                                                 do_statline_dynamic = NO;
 250                                         else if (!strcmp(s, "statless"))
 251                                                 do_less_stats = YES;
 252                                         else if (!strcmp(s, "norepeat"))
 253                                                 no_repeat = YES;
 254                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 255                                                 pw_prompt = s+7;
 256                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 257                                                 mac_pw_prompt = s+10;
 258                                         else if (!strcmp(s, "shorthex"))
 259                                                 do_full_hexdump = NO;
 260                                         else if (!strcmp(s, "fullkey"))
 261                                                 do_full_key = YES;
 262                                         else if (!strcmp(s, "showsecrets"))
 263                                                 show_secrets = YES;
 264                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 265                                                 s += 5;
 266                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 267                                                 if (!str_empty(stoi)) {
 268                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 269                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 270                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 271                                                         "%s: invalid block size value", s);
 272                                                 }
 273                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 274                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 275                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 276                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 277                                                         "%s: block size exceeds %u bytes",
 278                                                         s, TFC_U(TFC_BLKSIZE));
 279                                         }
 280                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 281                                                 s += 10;
 282                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 283                                                 if (!str_empty(stoi)) {
 284                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 285                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 286                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 287                                                         "%s: invalid blocks per xts block value", s);
 288                                                 }
 289                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 290                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 291                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 292                                                         s, TFC_U(TFC_BLKSIZE));
 293                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 294                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 295                                                         s, TFC_U(TFC_BLKSIZE));
 296                                         }
 297                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 298                                                 s += 6;
 299                                                 iseek = tfc_humanfsize(s, &stoi);
 300                                                 if (!str_empty(stoi)) {
 301                                                         iseek = tfc_fnamesize(s, YES);
 302                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 303                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 304                                                         "%s: invalid iseek value", s);
 305                                                 }
 306                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 307                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 308                                                         xerror(NO, YES, YES,
 309                                                                 "%s: not round to TF block size "
 310                                                                 "of %u bytes",
 311                                                                 s, TFC_U(TF_BLOCK_SIZE));
 312                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 313                                         }
 314                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 315                                                 s += 7;
 316                                                 iseek = tfc_humanfsize(s, &stoi);
 317                                                 if (!str_empty(stoi)) {
 318                                                         iseek = tfc_fnamesize(s, YES);
 319                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 320                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 321                                                                 "%s: invalid ixseek value", s);
 322                                                 }
 323                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 324                                         }
 325                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 326                                                 s += 5;
 327                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 328                                                 if (!str_empty(stoi)) {
 329                                                         iseek_blocks = tfc_fnamesize(s, YES);
 330                                                         if (iseek_blocks == NOFSIZE)
 331                                                                 xerror(NO, YES, YES,
 332                                                                 "%s: invalid ictr value", s);
 333                                                         iseek_blocks /= TF_BLOCK_SIZE;
 334                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 335                                                 }
 336                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 337                                         }
 338                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 339                                                 s += 6;
 340                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 341                                                 if (!str_empty(stoi)) {
 342                                                         iseek_blocks = tfc_fnamesize(s, YES);
 343                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 344                                                         if (iseek_blocks == NOFSIZE)
 345                                                                 xerror(NO, YES, YES,
 346                                                                 "%s: invalid ixctr value", s);
 347                                                 }
 348                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 349                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 350                                                         xerror(NO, YES, YES,
 351                                                         "%s: not round to TF block size "
 352                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 353                                                 iseek_blocks /= TF_BLOCK_SIZE;
 354                                         }
 355                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 356                                                 s += 6;
 357                                                 oseek = tfc_humanfsize(s, &stoi);
 358                                                 if (!str_empty(stoi)) {
 359                                                         oseek = tfc_fnamesize(s, YES);
 360                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 361                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 362                                                         "%s: invalid oseek value", s);
 363                                                 }
 364                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 365                                         }
 366                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 367                                                 s += 6;
 368                                                 maxlen = tfc_humanfsize(s, &stoi);
 369                                                 if (!str_empty(stoi)) {
 370                                                         maxlen = tfc_fnamesize(s, YES);
 371                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 372                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 373                                                         "%s: invalid count value", s);
 374                                                 }
 375                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 376                                                 if (counter_opt == TFC_CTR_HEAD)
 377                                                         maxlen += TF_BLOCK_SIZE;
 378                                         }
 379                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 380                                                 s += 5;
 381                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 382                                                 if (!str_empty(stoi)) {
 383                                                         maxkeylen = tfc_fnamesize(s, YES);
 384                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 385                                                         if (maxkeylen == NOSIZE)
 386                                                                 xerror(NO, YES, YES,
 387                                                                 "%s: invalid key length value", s);
 388                                                 }
 389                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 390                                         }
 391                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 392                                                 s += 5;
 393                                                 keyoffset = tfc_humanfsize(s, &stoi);
 394                                                 if (!str_empty(stoi)) {
 395                                                         keyoffset = tfc_fnamesize(s, YES);
 396                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 397                                                         if (keyoffset == NOFSIZE)
 398                                                                 xerror(NO, YES, YES,
 399                                                                 "%s: invalid key offset value", s);
 400                                                 }
 401                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 402                                         }
 403                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 404                                                 s += 5;
 405                                                 ctrsz = tfc_humanfsize(s, &stoi);
 406                                                 if (!str_empty(stoi)) {
 407                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 408                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 409                                                         if (ctrsz == NOSIZE)
 410                                                                 xerror(NO, YES, YES,
 411                                                                 "%s: invalid counter length value", s);
 412                                                 }
 413                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 414                                                 if (ctrsz > TF_BLOCK_SIZE)
 415                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 416                                         }
 417                                         else xerror(NO, YES, YES, "invalid option %s", s);
 418                                 }
 419                                 break;
 420                         case 'S':
 421                                 do_mac = TFC_MAC_SIGN;
 422                                 if (strcasecmp(optarg, "mac") != 0)
 423                                         do_mac_file = optarg;
 424                                 break;
 425                         case 'M':
 426                                 do_mac = TFC_MAC_VRFY;
 427                                 if (!strcasecmp(optarg, "drop"))
 428                                         do_mac = TFC_MAC_DROP;
 429                                 else if (strcasecmp(optarg, "mac") != 0)
 430                                         do_mac_file = optarg;
 431                                 break;
 432                         case 'm':
 433                                 if (do_mac != TFC_MAC_VRFY)
 434                                         xerror(NO, YES, YES, "signature source was not specified");
 435                                 do_mac = TFC_MAC_JUST_VRFY;
 436                                 break;
 437                         case 'R':
 438                         case 'Z':
 439                                 if (maxlen != NOFSIZE) {
 440                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 441                                         else genrandom_nr_bytes = maxlen;
 442                                 }
 443                                 else {
 444                                         tfc_fsize t;
 445                                         if (!strcasecmp(optarg, "cbs"))
 446                                                 t = TF_BLOCK_SIZE;
 447                                         else if (!strcasecmp(optarg, "ks"))
 448                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 449                                         else if (!strcasecmp(optarg, "xks"))
 450                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 451                                         else if (!strcasecmp(optarg, "iobs"))
 452                                                 t = blksize;
 453                                         else {
 454                                                 t = tfc_humanfsize(optarg, &stoi);
 455                                                 if (!str_empty(stoi)) {
 456                                                         t = tfc_fnamesize(optarg, NO);
 457                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 458                                                 }
 459                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 460                                         }
 461                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 462                                         else genrandom_nr_bytes = maxlen = t;
 463                                 }
 464                                 break;
 465                         case 'a':
 466                                 do_preserve_time = YES;
 467                                 break;
 468                         case 'A':
 469                                 do_outfmt = TFC_OUTFMT_B64;
 470                                 break;
 471                         case 'W':
 472                                 do_outfmt = TFC_OUTFMT_RAW;
 473                                 break;
 474                         case 'H':
 475                                 do_outfmt = TFC_OUTFMT_HEX;
 476                                 break;
 477                         case 'q':
 478                                 quiet = YES;
 479                                 verbose = NO;
 480                                 status_timer = 0;
 481                                 break;
 482                         case 'v':
 483                                 verbose = YES;
 484                                 break;
 485                         case 'V':
 486                                 td = strtod(optarg, &stoi);
 487                                 status_timer = TFC_DTOUSECS(td);
 488                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 489                                 break;
 490                         default:
 491                                 usage();
 492                                 break;
 493                 }
 494         }
 495
 496         if (!strcmp(progname, "tfbench")) {
 497                 if (!*(argv+optind)) usage();
 498
 499                 td = strtod(*(argv+optind), &stoi);
 500                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 501                         xerror(NO, YES, YES,
 502                         "%s: invalid benchmark time in seconds", *(argv+optind));
 503                 bench_timer = TFC_DTOUSECS(td);
 504                 do_benchmark(bench_timer, td);
 505         }
 506         if (genrandom_nr_bytes) {
 507                 ctr_mode = TFC_MODE_STREAM;
 508                 do_edcrypt = TFC_DO_ENCRYPT;
 509                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 510         }
 511         if (genzero_nr_bytes) {
 512                 ctr_mode = TFC_MODE_PLAIN;
 513                 do_edcrypt = TFC_DO_PLAIN;
 514                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 515         }
 516
 517         if (rawkey && password)
 518                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 519         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 520                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 521         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 522                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 523         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 524                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 525         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 526                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 527         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 528                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 529         if (ctr_mode == TFC_MODE_PLAIN
 530         && (do_edcrypt || do_mac || rawkey
 531         || mackey_opt || counter_opt || counter_file))
 532                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 533
 534         errno = 0;
 535         do_stop = NO;
 536
 537         if (saltf) {
 538                 int saltfd;
 539
 540                 memset(tfc_salt, 0, TFC_MAX_SALT);
 541                 tfc_saltsz = 0;
 542                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 543
 544                 if (!strcmp(saltf, "-")) saltfd = 0;
 545                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 546                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 547                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 548                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 549                 tfc_saltsz = lio;
 550                 xclose(saltfd);
 551         }
 552
 553 _nosalt:
 554         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 555                 int mkfd = -1;
 556                 tfc_yesno do_stop;
 557
 558                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 559                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 560                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 561
 562                 skein_init(&sk, TFC_KEY_BITS);
 563
 564                 do_stop = NO;
 565                 while (1) {
 566                         if (do_stop) break;
 567                         pblk = tmpdata;
 568                         ldone = 0;
 569                         lrem = lblock = sizeof(tmpdata);
 570                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 571 _mkragain:              lio = xread(mkfd, pblk, lrem);
 572                         if (lio == 0) do_stop = YES;
 573                         if (lio != NOSIZE) ldone += lio;
 574                         else {
 575                                 if (errno != EIO && catch_all_errors != YES)
 576                                         xerror(NO, NO, NO, "%s", mackeyf);
 577                                 switch (error_action) {
 578                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 579                                         case TFC_ERRACT_SYNC:
 580                                         case TFC_ERRACT_LSYNC:
 581                                                 xerror(YES, NO, NO, "%s", mackeyf);
 582                                                 lio = ldone = lrem = lblock;
 583                                                 memset(tmpdata, 0, lio);
 584                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 585                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 586                                                 break;
 587                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 588                                 }
 589                         }
 590                         if (lio && lio < lrem) {
 591                                 pblk += lio;
 592                                 lrem -= lio;
 593                                 goto _mkragain;
 594                         }
 595
 596                         skein_update(&sk, tmpdata, ldone);
 597                 }
 598
 599                 skein_final(mackey, &sk);
 600
 601                 xclose(mkfd);
 602         }
 603         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 604                 memset(&getps, 0, sizeof(struct getpasswd_state));
 605                 getps.fd = getps.efd = -1;
 606                 getps.passwd = pwdask;
 607                 getps.pwlen = sizeof(pwdask)-1;
 608                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 609                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 610                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 611                 getps.flags = GETP_WAITFILL;
 612                 n = xgetpasswd(&getps);
 613                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 614                 if (n == ((size_t)-2)) xexit(1);
 615                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 616                 if (verbose) {
 617                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 618                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 619                         tfc_nfsay(stderr, "MAC password hint: ");
 620                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 621                         memset(tmpdata, 0, sizeof(tmpdata));
 622                 }
 623         }
 624
 625
 626         if ((strlen(progname) <= 9)
 627         && ((!strcmp(progname, "sksum"))
 628         || ((!memcmp(progname, "sk", 2))
 629         && (!memcmp(progname+3, "sum", 3)
 630         || !memcmp(progname+4, "sum", 3)
 631         || !memcmp(progname+5, "sum", 3)
 632         || !memcmp(progname+6, "sum", 3)))))
 633                 do_sksum(progname, argv+optind);
 634         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 635
 636         idx = optind;
 637
 638         if (argv[idx]) {
 639                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 640                 if (!strcmp(argv[idx], "-")) kfd = 0;
 641                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 642                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 643
 644                 lio = strnlen(argv[idx], PATH_MAX);
 645                 memset(argv[idx], '*', lio);
 646
 647                 idx++;
 648         }
 649         else password = YES;
 650
 651         errno = 0;
 652         if (do_full_key == NO && tweakf) {
 653                 int twfd;
 654
 655                 if (!strcmp(tweakf, "-")) twfd = 0;
 656                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 657                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 658                 lio = ldone = xread(twfd, tweak, TF_TWEAK_SIZE);
 659                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 660                 if (ldone < TF_TWEAK_SIZE)
 661                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, TF_TWEAK_SIZE);
 662                 xclose(twfd);
 663         }
 664
 665 _nokeyfd:
 666         errno = 0;
 667         if (argv[idx]) {
 668                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 669                 else {
 670                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 671                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 672                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 673                 }
 674                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 675
 676                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 677                         if (verbose) tfc_esay("%s: disabling signature verification on "
 678                                 "requested partial decryption.", progname);
 679                         do_mac = NO;
 680                 }
 681
 682                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 683                         maxlen = tfc_fdsize(sfd);
 684                         if (maxlen == NOFSIZE)
 685                                 xerror(NO, YES, YES,
 686                                 "Cannot verify embedded MAC with non-seekable source!");
 687                         maxlen -= TF_FROM_BITS(macbits);
 688                 }
 689                 srcfname = argv[idx];
 690                 idx++;
 691         }
 692
 693         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 694                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 695
 696         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 697         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 698
 699         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 700         errno = 0;
 701         if (counter_file) {
 702                 int ctrfd;
 703
 704                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 705                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 706                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 707                 lio = xread(ctrfd, ctr, ctrsz);
 708                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 709                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 710                 xclose(ctrfd);
 711         }
 712         else if (counter_opt == TFC_CTR_HEAD) {
 713                 pblk = ctr;
 714                 ldone = 0;
 715                 lrem = lblock = ctrsz;
 716                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 717 _ctrragain:     lio = xread(sfd, pblk, lrem);
 718                 if (lio != NOSIZE) ldone += lio;
 719                 else {
 720                         if (errno != EIO && catch_all_errors != YES)
 721                                 xerror(NO, NO, NO, "%s", srcfname);
 722                         switch (error_action) {
 723                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 724                                 case TFC_ERRACT_SYNC:
 725                                 case TFC_ERRACT_LSYNC:
 726                                         xerror(YES, NO, NO, "%s", srcfname);
 727                                         lio = ldone = lrem = lblock;
 728                                         memset(ctr, 0, lio);
 729                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 730                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 731                                         break;
 732                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 733                         }
 734                 }
 735                 if (lio && lio < lrem) {
 736                         pblk += lio;
 737                         lrem -= lio;
 738                         goto _ctrragain;
 739                 }
 740                 total_processed_src += ldone;
 741         }
 742
 743 _ctrskip1:
 744         if (iseek) {
 745                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 746                         iseek += ctrsz;
 747                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 748                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 749         }
 750
 751         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 752
 753         if (verbose) tfc_esay("%s: hashing password", progname);
 754
 755         if (rawkey == TFC_RAWKEY_KEYFILE) {
 756                 tfc_yesno xtskeyset = NO;
 757
 758                 pblk = key;
 759 _xts2key:       ldone = 0;
 760                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 761                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 762 _keyragain:     lio = xread(kfd, pblk, lrem);
 763                 if (lio != NOSIZE) ldone += lio;
 764                 else {
 765                         if (errno != EIO && catch_all_errors != YES)
 766                                 xerror(NO, NO, NO, "reading key");
 767                         switch (error_action) {
 768                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 769                                 case TFC_ERRACT_SYNC:
 770                                 case TFC_ERRACT_LSYNC:
 771                                         xerror(YES, NO, NO, "reading key");
 772                                         lio = ldone = lrem = lblock;
 773                                         memset(key, 0, lio);
 774                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 775                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 776                                         break;
 777                                 default: xerror(NO, NO, NO, "reading key"); break;
 778                         }
 779                 }
 780                 if (lio && lio < lrem) {
 781                         pblk += lio;
 782                         lrem -= lio;
 783                         goto _keyragain;
 784                 }
 785                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 786
 787                 if (ctr_mode == TFC_MODE_XTS) {
 788                         if (xtskeyset == NO) {
 789                                 pblk = xtskey;
 790                                 xtskeyset = YES;
 791                                 goto _xts2key;
 792                         }
 793                 }
 794         }
 795         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 796                 tfc_yesno xtskeyset = NO;
 797
 798                 pblk = key; n = sizeof(key);
 799 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 800                 getps.fd = getps.efd = -1;
 801                 getps.passwd = (char *)pblk;
 802                 getps.pwlen = n;
 803                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 804                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 805                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 806                 getps.flags = GETP_WAITFILL;
 807                 n = xgetpasswd(&getps);
 808                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 809                 if (n == ((size_t)-2)) xexit(1);
 810                 if (ctr_mode == TFC_MODE_XTS) {
 811                         if (xtskeyset == NO) {
 812                                 pblk = xtskey; n = sizeof(xtskey);
 813                                 xtskeyset = YES;
 814                                 goto _xts2keyaskstr;
 815                         }
 816                 }
 817         }
 818         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 819                 tfc_yesno xtskeyset = NO;
 820
 821                 pblk = key;
 822 _rawkey_hex_again:
 823                 memset(&getps, 0, sizeof(struct getpasswd_state));
 824                 getps.fd = getps.efd = -1;
 825                 getps.passwd = pwdask;
 826                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 827                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 828                 getps.charfilter = (show_secrets == YES) ? getps_plain_hex_filter : getps_hex_filter;
 829                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 830                 getps.flags = GETP_WAITFILL;
 831                 n = xgetpasswd(&getps);
 832                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 833                 if (n == ((size_t)-2)) xexit(1);
 834                 if (n % 2) {
 835                         tfc_esay("Please input even number of hex digits!");
 836                         goto _rawkey_hex_again;
 837                 }
 838                 hex2bin(pblk, pwdask);
 839                 memset(pwdask, 0, sizeof(pwdask));
 840                 if (ctr_mode == TFC_MODE_XTS) {
 841                         if (xtskeyset == NO) {
 842                                 pblk = xtskey;
 843                                 xtskeyset = YES;
 844                                 goto _rawkey_hex_again;
 845                         }
 846                 }
 847         }
 848         else if (password) {
 849 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 850                 getps.fd = getps.efd = -1;
 851                 getps.passwd = pwdask;
 852                 getps.pwlen = sizeof(pwdask)-1;
 853                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 854                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 855                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 856                 getps.flags = GETP_WAITFILL;
 857                 n = xgetpasswd(&getps);
 858                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 859                 if (n == ((size_t)-2)) xexit(1);
 860                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 861                         getps.fd = getps.efd = -1;
 862                         getps.passwd = pwdagain;
 863                         getps.pwlen = sizeof(pwdagain)-1;
 864                         getps.echo = "Enter it again: ";
 865                         getps.flags = GETP_WAITFILL;
 866                         n = xgetpasswd(&getps);
 867                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 868                         if (n == ((size_t)-2)) xexit(1);
 869                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 870                                 tfc_esay("Passwords are different, try again");
 871                                 goto _pwdagain;
 872                         }
 873                 }
 874                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 875                 memset(pwdask, 0, sizeof(pwdask));
 876                 memset(pwdagain, 0, sizeof(pwdagain));
 877         }
 878         else {
 879                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 880                         xerror(NO, NO, YES, "hashing key");
 881         }
 882
 883         if (rawkey == NO) {
 884                 if (tfc_saltsz > 0) {
 885                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 886                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 887                 }
 888                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 889                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 890                 memset(tfc_salt, 0, TFC_MAX_SALT);
 891         }
 892
 893         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 894                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 895         }
 896
 897         if (genkeyf) {
 898                 int krfd;
 899                 tfc_yesno xtskeyset = NO;
 900
 901                 pblk = key;
 902                 if (!strcmp(genkeyf, "-")) krfd = 1;
 903                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 904                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 905 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 906                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 907                 if (verbose && xtskeyset == NO) {
 908                         tfc_esay("%s: password hashing done", progname);
 909                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 910                         tfc_esay("%s: Have a nice day!", progname);
 911                 }
 912
 913                 if (ctr_mode == TFC_MODE_XTS) {
 914                         if (xtskeyset == NO) {
 915                                 pblk = xtskey;
 916                                 xtskeyset = YES;
 917                                 goto _xts2genkey;
 918                         }
 919                 }
 920
 921                 fchmod(krfd, 0600);
 922                 xclose(krfd);
 923                 xexit(0);
 924         }
 925
 926         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 927                 if (verbose) tfc_esay("%s: disabling signature verification on "
 928                         "requested partial decryption.", progname);
 929                 do_mac = NO;
 930         }
 931
 932         if (do_mac != NO) {
 933                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 934                 if (ctr_mode < TFC_MODE_OCB) {
 935                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 936                                 "will be slower.", progname);
 937                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 938                         else skein_init(&sk, macbits);
 939                 }
 940         }
 941
 942         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 943                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 944         }
 945
 946         tf_convkey(key);
 947         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 948         if (do_full_key == NO) {
 949                 if (!tweakf) skein(tweak, TF_NR_TWEAK_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 950                 tf_tweak_set(key, tweak);
 951         }
 952         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 953
 954         if (counter_opt == TFC_CTR_ZERO) memset(ctr, 0, ctrsz);
 955
 956         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 957         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 958
 959         if (counter_opt == TFC_CTR_SHOW) {
 960                 switch (do_outfmt) {
 961                         case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 962                         case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
 963                         case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 964                 }
 965         }
 966         else if (counter_opt == TFC_CTR_RAND) tfc_getrandom(ctr, ctrsz);
 967
 968 _ctrskip2:
 969         if (kfd != -1) {
 970                 xclose(kfd);
 971                 kfd = -1;
 972         }
 973         if (verbose) tfc_esay("%s: password hashing done", progname);
 974
 975         if (overwrite_source && srcfname) argv[idx] = srcfname;
 976
 977 _plain:
 978         if (argv[idx]) {
 979                 if (!strcmp(argv[idx], "-")) dfd = 1;
 980                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 981                 if (dfd == -1) {
 982                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 983                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 984                 }
 985                 dstfname = argv[idx];
 986                 idx++;
 987         }
 988
 989         if (oseek) {
 990                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 991                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
 992         }
 993
 994         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 995         memset(&sigact, 0, sizeof(sigact));
 996         sigact.sa_flags = SA_RESTART;
 997         sigact.sa_handler = print_crypt_status;
 998         sigaction(SIGUSR1, &sigact, NULL);
 999         sigaction(SIGTSTP, &sigact, NULL);
1000         sigaction(SIGALRM, &sigact, NULL);
1001         if (status_timer) setup_next_alarm(status_timer);
1002         sigact.sa_handler = change_status_width;
1003         sigaction(SIGQUIT, &sigact, NULL);
1004         sigact.sa_handler = change_status_timer;
1005         sigaction(SIGUSR2, &sigact, NULL);
1006         if (quiet == NO) {
1007                 sigact.sa_handler = print_crypt_status;
1008                 sigaction(SIGINT, &sigact, NULL);
1009                 sigaction(SIGTERM, &sigact, NULL);
1010         }
1011         else {
1012                 sigact.sa_handler = exit_sigterm;
1013                 sigaction(SIGINT, &sigact, NULL);
1014                 sigaction(SIGTERM, &sigact, NULL);
1015         }
1016         memset(&sigact, 0, sizeof(struct sigaction));
1017
1018         tfc_getcurtime(&delta_time);
1019
1020         errno = 0;
1021         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
1022                 pblk = ctr;
1023                 lio = lrem = ctrsz;
1024                 ldone = 0;
1025 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
1026                 if (lio != NOSIZE) ldone += lio;
1027                 else xerror(NO, NO, NO, "%s", dstfname);
1028                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1029                 if (lio < lrem) {
1030                         pblk += lio;
1031                         lrem -= lio;
1032                         goto _ctrwagain;
1033                 }
1034                 total_processed_dst += ldone;
1035                 delta_processed += ldone;
1036         }
1037
1038         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
1039
1040         errno = 0;
1041         do_stop = NO;
1042         while (1) {
1043                 if (do_stop) break;
1044                 pblk = srcblk;
1045                 ldone = 0;
1046                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1047                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1048 _ragain:        lio = xread(sfd, pblk, lrem);
1049                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
1050                 if (lio != NOSIZE) ldone += lio;
1051                 else {
1052                         if (errno != EIO && catch_all_errors != YES)
1053                                 xerror(NO, NO, NO, "%s", srcfname);
1054                         switch (error_action) {
1055                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1056                                 case TFC_ERRACT_SYNC:
1057                                 case TFC_ERRACT_LSYNC:
1058                                         xerror(YES, NO, NO, "%s", srcfname);
1059                                         lio = ldone = lrem = lblock;
1060                                         memset(srcblk, 0, lio);
1061                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1062                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1063                                         break;
1064                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1065                         }
1066                 }
1067                 if (lio && lio < lrem) {
1068                         pblk += lio;
1069                         lrem -= lio;
1070                         goto _ragain;
1071                 }
1072                 total_processed_src += ldone;
1073
1074                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1075                         size_t orig = ldone;
1076                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1077                         if (ldone > blksize) ldone = blksize;
1078                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1079                 }
1080
1081                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1082                         skein_update(&sk, srcblk, ldone);
1083
1084                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1085                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1086                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1087                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1088                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1089                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1090                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1091                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1092                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1093                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1094                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1095                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1096                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1097                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1098
1099                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1100                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1101                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1102                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1103
1104                 else if (ctr_mode == TFC_MODE_PLAIN)
1105                         memcpy(dstblk, srcblk, ldone);
1106
1107                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1108                         skein_update(&sk, dstblk, ldone);
1109                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1110
1111                 pblk = dstblk;
1112                 lrem = ldone;
1113                 ldone = 0;
1114 _wagain:        lio = xwrite(dfd, pblk, lrem);
1115                 if (lio != NOSIZE) ldone += lio;
1116                 else xerror(NO, NO, NO, "%s", dstfname);
1117                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1118                 if (lio < lrem) {
1119                         pblk += lio;
1120                         lrem -= lio;
1121                         goto _wagain;
1122                 }
1123 _nowrite:       total_processed_dst += ldone;
1124                 delta_processed += ldone;
1125
1126                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1127         }
1128
1129         if (do_stop == TFC_STOP_FULL) goto _nomac;
1130
1131         errno = 0;
1132         if (do_mac >= TFC_MAC_VRFY) {
1133                 if (!do_mac_file) {
1134                         pblk = macvrfy;
1135                         ldone = 0;
1136                         lrem = lblock = TF_FROM_BITS(macbits);
1137                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1138 _macragain:             lio = xread(sfd, pblk, lrem);
1139                         if (lio != NOSIZE) ldone += lio;
1140                         else {
1141                                 if (errno != EIO && catch_all_errors != YES)
1142                                         xerror(NO, NO, NO, "%s", srcfname);
1143                                 switch (error_action) {
1144                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1145                                         case TFC_ERRACT_SYNC:
1146                                         case TFC_ERRACT_LSYNC:
1147                                                 xerror(YES, NO, NO, "%s", srcfname);
1148                                                 lio = ldone = lrem = lblock;
1149                                                 memset(macvrfy, 0, lio);
1150                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1151                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1152                                                 break;
1153                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1154                                 }
1155                         }
1156                         if (lio && lio < lrem) {
1157                                 pblk += lio;
1158                                 lrem -= lio;
1159                                 goto _macragain;
1160                         }
1161                         total_processed_src += ldone;
1162                 }
1163                 else {
1164                         int mfd;
1165
1166                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1167                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1168                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1169                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1170                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1171                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1172                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1173                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1174                                 lio = TF_FROM_BITS(macbits);
1175                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1176                         }
1177                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1178                         xclose(mfd);
1179                 }
1180
1181                 if (ldone < TF_FROM_BITS(macbits)) {
1182                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1183                                 "not verifying", progname, ldone);
1184                         exitcode = 1;
1185                         goto _shortmac;
1186                 }
1187
1188                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1189                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1190
1191                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1192                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1193                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1194                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1195                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1196                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1197
1198                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1199                         if (quiet == NO) {
1200                                 tfc_esay("%s: signature is good", progname);
1201                                 if (verbose) {
1202                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1203                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1204                                 }
1205                         }
1206                 }
1207                 else {
1208                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1209                                 "wrong password, key, mode, or file is not signed", progname);
1210                         exitcode = 1;
1211                 }
1212
1213 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1214                 memset(macresult, 0, sizeof(macresult));
1215                 memset(tmpdata, 0, sizeof(tmpdata));
1216         }
1217
1218         else if (do_mac == TFC_MAC_SIGN) {
1219                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1220                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1221
1222                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1223                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1224                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1225                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1226                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1227                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1228                 memset(macresult, 0, sizeof(macresult));
1229
1230                 if (!do_mac_file) {
1231                         pblk = tmpdata;
1232                         lio = lrem = TF_FROM_BITS(macbits);
1233                         ldone = 0;
1234 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1235                         if (lio != NOSIZE) ldone += lio;
1236                         else xerror(NO, NO, NO, "%s", dstfname);
1237                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1238                         if (lio < lrem) {
1239                                 pblk += lio;
1240                                 lrem -= lio;
1241                                 goto _macwagain;
1242                         }
1243                         total_processed_dst += ldone;
1244                         delta_processed += ldone;
1245                 }
1246                 else {
1247                         int mfd;
1248
1249                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1250                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1251                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1252                         if (do_outfmt == TFC_OUTFMT_B64) {
1253                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1254                                 memset(tmpdata, 0, TFC_TMPSIZE);
1255                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1256                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1257                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1258                                 if (lrem) {
1259                                         tmpdata[lrem] = '\n';
1260                                         lrem++;
1261                                 }
1262                                 lio = xwrite(mfd, tmpdata, lrem);
1263                         }
1264                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1265                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1266                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1267                         xclose(mfd);
1268                 }
1269
1270                 memset(macvrfy, 0, sizeof(macvrfy));
1271                 memset(macresult, 0, sizeof(macresult));
1272                 memset(tmpdata, 0, sizeof(tmpdata));
1273         }
1274
1275 _nomac:
1276         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1277
1278         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1279         xclose(sfd);
1280         xclose(dfd);
1281
1282         xexit(exitcode);
1283         return -1;
1284 }