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