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