tfcrypt.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2019 Andrey Rys. All rights reserved.
   6  *
   7  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  24  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "tfcrypt.h"
  30
  31 static 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 if (strchr(optarg, ':')) {
 153                                         char *ss, chr;
 154
 155                                         counter_opt = TFC_CTR_SSET;
 156                                         n = sizeof(ctr);
 157
 158                                         s = d = optarg; t = NULL;
 159                                         while ((s = strtok_r(d, ",", &t))) {
 160                                                 if (d) d = NULL;
 161
 162                                                 if (n == 0) break;
 163                                                 ss = strchr(s, ':');
 164                                                 if (!ss) continue;
 165                                                 *ss = 0; ss++;
 166                                                 chr = (char)strtoul(s, &stoi, 16);
 167                                                 if (!str_empty(stoi)) continue;
 168                                                 x = (size_t)strtoul(ss, &stoi, 10);
 169                                                 if (!str_empty(stoi)) continue;
 170                                                 if (x > n) x = n;
 171                                                 memset(ctr+(sizeof(ctr)-n), (int)chr, x);
 172                                                 n -= x;
 173                                         }
 174                                 }
 175                                 else counter_file = sksum_hashlist_file = optarg;
 176                                 break;
 177                         case 'C':
 178                                 if (!strcasecmp(optarg, "ctr"))
 179                                         ctr_mode = TFC_MODE_CTR;
 180                                 else if (!strcasecmp(optarg, "stream"))
 181                                         ctr_mode = TFC_MODE_STREAM;
 182                                 else if (!strcasecmp(optarg, "cbc"))
 183                                         ctr_mode = TFC_MODE_CBC;
 184                                 else if (!strcasecmp(optarg, "ecb"))
 185                                         ctr_mode = TFC_MODE_ECB;
 186                                 else if (!strcasecmp(optarg, "xts"))
 187                                         ctr_mode = TFC_MODE_XTS;
 188                                 else if (!strcasecmp(optarg, "ocb"))
 189                                         ctr_mode = TFC_MODE_OCB;
 190                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
 191                                 break;
 192                         case 'P':
 193                                 do_edcrypt = TFC_DO_PLAIN;
 194                                 password = YES;
 195                                 ctr_mode = TFC_MODE_PLAIN;
 196                                 break;
 197                         case 'e':
 198                                 do_edcrypt = TFC_DO_ENCRYPT;
 199                                 break;
 200                         case 'd':
 201                                 do_edcrypt = TFC_DO_DECRYPT;
 202                                 break;
 203                         case 'D':
 204                                 macbits = strtoul(optarg, &stoi, 10);
 205                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 206                                 || macbits > TF_MAX_BITS || macbits % 8)
 207                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 208                                 break;
 209                         case 'n':
 210                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 211                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 212                                 break;
 213                         case 'U':
 214                                 if (!strcasecmp(optarg, "key"))
 215                                         mackey_opt = TFC_MACKEY_RAWKEY;
 216                                 else if (!strcasecmp(optarg, "pwd"))
 217                                         mackey_opt = TFC_MACKEY_PASSWORD;
 218                                 else {
 219                                         mackey_opt = TFC_MACKEY_FILE;
 220                                         mackeyf = optarg;
 221                                 }
 222                                 break;
 223                         case 'p':
 224                                 password = YES;
 225                                 break;
 226                         case 'k':
 227                                 rawkey = TFC_RAWKEY_KEYFILE;
 228                                 break;
 229                         case 'z':
 230                                 rawkey = TFC_RAWKEY_ASKSTR;
 231                                 break;
 232                         case 'x':
 233                                 rawkey = TFC_RAWKEY_ASKHEX;
 234                                 break;
 235                         case 'K':
 236                                 verbose = YES;
 237                                 genkeyf = optarg;
 238                                 break;
 239                         case 't':
 240                                 tweakf = optarg;
 241                                 do_full_key = NO;
 242                                 break;
 243                         case 'l':
 244                                 if (maxlen != NOFSIZE) break;
 245
 246                                 maxlen = tfc_humanfsize(optarg, &stoi);
 247                                 if (!str_empty(stoi)) {
 248                                         maxlen = tfc_fnamesize(optarg, YES);
 249                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 250                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 251                                         "%s: invalid count value", optarg);
 252                                 }
 253                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 254                                 if (counter_opt == TFC_CTR_HEAD)
 255                                         maxlen += TF_BLOCK_SIZE;
 256                                 break;
 257                         case 'w':
 258                                 overwrite_source = YES;
 259                                 break;
 260                         case 'E':
 261                                 if (!strcmp(optarg, "xall")) {
 262                                         catch_all_errors = YES;
 263                                         break;
 264                                 }
 265                                 if (!strcmp(optarg, "xseek")) {
 266                                         ignore_seek_errors = YES;
 267                                         break;
 268                                 }
 269                                 if (!strcmp(optarg, "exit"))
 270                                         error_action = TFC_ERRACT_EXIT;
 271                                 else if (!strncmp(optarg, "cont", 4))
 272                                         error_action = TFC_ERRACT_CONT;
 273                                 else if (!strcmp(optarg, "sync"))
 274                                         error_action = TFC_ERRACT_SYNC;
 275                                 else if (!strcmp(optarg, "lsync"))
 276                                         error_action = TFC_ERRACT_LSYNC;
 277                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 278                                 break;
 279                         case 'O':
 280                                 s = d = optarg; t = NULL;
 281                                 while ((s = strtok_r(d, ",", &t))) {
 282                                         if (d) d = NULL;
 283                                         if (!strcmp(s, "sync"))
 284                                                 write_flags |= O_SYNC;
 285                                         else if (!strcmp(s, "trunc"))
 286                                                 write_flags |= O_TRUNC;
 287                                         else if (!strcmp(s, "fsync"))
 288                                                 do_fsync = YES;
 289                                         else if (!strcmp(s, "pad"))
 290                                                 do_pad = YES;
 291                                         else if (!strcmp(s, "xtime"))
 292                                                 do_preserve_time = YES;
 293                                         else if (!strcmp(s, "gibsize"))
 294                                                 do_stats_in_gibs = YES;
 295                                         else if (!strcmp(s, "plainstats"))
 296                                                 do_statline_dynamic = NO;
 297                                         else if (!strcmp(s, "statless"))
 298                                                 do_less_stats = YES;
 299                                         else if (!strcmp(s, "norepeat"))
 300                                                 no_repeat = YES;
 301                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 302                                                 pw_prompt = s+7;
 303                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 304                                                 mac_pw_prompt = s+10;
 305                                         else if (!strcmp(s, "shorthex"))
 306                                                 do_full_hexdump = NO;
 307                                         else if (!strcmp(s, "fullkey"))
 308                                                 do_full_key = YES;
 309                                         else if (!strcmp(s, "showsecrets"))
 310                                                 show_secrets = YES;
 311                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 312                                                 s += 5;
 313                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 314                                                 if (!str_empty(stoi)) {
 315                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 316                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 317                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 318                                                         "%s: invalid block size value", s);
 319                                                 }
 320                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 321                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 322                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 323                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 324                                                         "%s: block size exceeds %u bytes",
 325                                                         s, TFC_U(TFC_BLKSIZE));
 326                                         }
 327                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 328                                                 s += 10;
 329                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 330                                                 if (!str_empty(stoi)) {
 331                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 332                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 333                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 334                                                         "%s: invalid blocks per xts block value", s);
 335                                                 }
 336                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 337                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 338                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 339                                                         s, TFC_U(TFC_BLKSIZE));
 340                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 341                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 342                                                         s, TFC_U(TFC_BLKSIZE));
 343                                         }
 344                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 345                                                 s += 6;
 346                                                 iseek = tfc_humanfsize(s, &stoi);
 347                                                 if (!str_empty(stoi)) {
 348                                                         iseek = tfc_fnamesize(s, YES);
 349                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 350                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 351                                                         "%s: invalid iseek value", s);
 352                                                 }
 353                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 354                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 355                                                         xerror(NO, YES, YES,
 356                                                                 "%s: not round to TF block size "
 357                                                                 "of %u bytes",
 358                                                                 s, TFC_U(TF_BLOCK_SIZE));
 359                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 360                                         }
 361                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 362                                                 s += 7;
 363                                                 iseek = tfc_humanfsize(s, &stoi);
 364                                                 if (!str_empty(stoi)) {
 365                                                         iseek = tfc_fnamesize(s, YES);
 366                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 367                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 368                                                                 "%s: invalid ixseek value", s);
 369                                                 }
 370                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 371                                         }
 372                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 373                                                 s += 5;
 374                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 375                                                 if (!str_empty(stoi)) {
 376                                                         iseek_blocks = tfc_fnamesize(s, YES);
 377                                                         if (iseek_blocks == NOFSIZE)
 378                                                                 xerror(NO, YES, YES,
 379                                                                 "%s: invalid ictr value", s);
 380                                                         iseek_blocks /= TF_BLOCK_SIZE;
 381                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 382                                                 }
 383                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 384                                         }
 385                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 386                                                 s += 6;
 387                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 388                                                 if (!str_empty(stoi)) {
 389                                                         iseek_blocks = tfc_fnamesize(s, YES);
 390                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 391                                                         if (iseek_blocks == NOFSIZE)
 392                                                                 xerror(NO, YES, YES,
 393                                                                 "%s: invalid ixctr value", s);
 394                                                 }
 395                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 396                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 397                                                         xerror(NO, YES, YES,
 398                                                         "%s: not round to TF block size "
 399                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 400                                                 iseek_blocks /= TF_BLOCK_SIZE;
 401                                         }
 402                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 403                                                 s += 6;
 404                                                 oseek = tfc_humanfsize(s, &stoi);
 405                                                 if (!str_empty(stoi)) {
 406                                                         oseek = tfc_fnamesize(s, YES);
 407                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 408                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 409                                                         "%s: invalid oseek value", s);
 410                                                 }
 411                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 412                                         }
 413                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 414                                                 s += 6;
 415                                                 maxlen = tfc_humanfsize(s, &stoi);
 416                                                 if (!str_empty(stoi)) {
 417                                                         maxlen = tfc_fnamesize(s, YES);
 418                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 419                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 420                                                         "%s: invalid count value", s);
 421                                                 }
 422                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 423                                                 if (counter_opt == TFC_CTR_HEAD)
 424                                                         maxlen += TF_BLOCK_SIZE;
 425                                         }
 426                                         else if (!strncmp(s, "ftrunc", 6) && *(s+6) == '=') {
 427                                                 s += 7;
 428                                                 ftrunc_dfd = tfc_humanfsize(s, &stoi);
 429                                                 if (!str_empty(stoi)) {
 430                                                         ftrunc_dfd = tfc_fnamesize(s, YES);
 431                                                         ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 432                                                         if (ftrunc_dfd == NOFSIZE) xerror(NO, YES, YES,
 433                                                         "%s: invalid ftrunc value", s);
 434                                                 }
 435                                                 else ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
 436                                         }
 437                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 438                                                 s += 5;
 439                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 440                                                 if (!str_empty(stoi)) {
 441                                                         maxkeylen = tfc_fnamesize(s, YES);
 442                                                         maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 443                                                         if (maxkeylen == NOSIZE)
 444                                                                 xerror(NO, YES, YES,
 445                                                                 "%s: invalid key length value", s);
 446                                                 }
 447                                                 else maxkeylen = tfc_modifysize(maxkeylen, strchr(s, ':'));
 448                                         }
 449                                         else if (!strncmp(s, "okey", 4) && *(s+4) == '=') {
 450                                                 s += 5;
 451                                                 keyoffset = tfc_humanfsize(s, &stoi);
 452                                                 if (!str_empty(stoi)) {
 453                                                         keyoffset = tfc_fnamesize(s, YES);
 454                                                         keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 455                                                         if (keyoffset == NOFSIZE)
 456                                                                 xerror(NO, YES, YES,
 457                                                                 "%s: invalid key offset value", s);
 458                                                 }
 459                                                 else keyoffset = tfc_modifysize(keyoffset, strchr(s, ':'));
 460                                         }
 461                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 462                                                 s += 5;
 463                                                 ctrsz = tfc_humanfsize(s, &stoi);
 464                                                 if (!str_empty(stoi)) {
 465                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 466                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 467                                                         if (ctrsz == NOSIZE)
 468                                                                 xerror(NO, YES, YES,
 469                                                                 "%s: invalid counter length value", s);
 470                                                 }
 471                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 472                                                 if (ctrsz > TF_BLOCK_SIZE)
 473                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 474                                         }
 475                                         else xerror(NO, YES, YES, "invalid option %s", s);
 476                                 }
 477                                 break;
 478                         case 'S':
 479                                 do_mac = TFC_MAC_SIGN;
 480                                 if (strcasecmp(optarg, "mac") != 0)
 481                                         do_mac_file = optarg;
 482                                 break;
 483                         case 'M':
 484                                 do_mac = TFC_MAC_VRFY;
 485                                 if (!strcasecmp(optarg, "drop"))
 486                                         do_mac = TFC_MAC_DROP;
 487                                 else if (strcasecmp(optarg, "mac") != 0)
 488                                         do_mac_file = optarg;
 489                                 break;
 490                         case 'm':
 491                                 if (do_mac != TFC_MAC_VRFY)
 492                                         xerror(NO, YES, YES, "signature source was not specified");
 493                                 do_mac = TFC_MAC_JUST_VRFY;
 494                                 break;
 495                         case 'R':
 496                         case 'Z':
 497                                 if (maxlen != NOFSIZE) {
 498                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 499                                         else genrandom_nr_bytes = maxlen;
 500                                 }
 501                                 else {
 502                                         tfc_fsize t;
 503                                         if (!strcasecmp(optarg, "cbs"))
 504                                                 t = TF_BLOCK_SIZE;
 505                                         else if (!strcasecmp(optarg, "ks"))
 506                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 507                                         else if (!strcasecmp(optarg, "xks"))
 508                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 509                                         else if (!strcasecmp(optarg, "iobs"))
 510                                                 t = blksize;
 511                                         else {
 512                                                 t = tfc_humanfsize(optarg, &stoi);
 513                                                 if (!str_empty(stoi)) {
 514                                                         t = tfc_fnamesize(optarg, NO);
 515                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 516                                                 }
 517                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 518                                         }
 519                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 520                                         else genrandom_nr_bytes = maxlen = t;
 521                                 }
 522                                 break;
 523                         case 'a':
 524                                 do_preserve_time = YES;
 525                                 break;
 526                         case 'A':
 527                                 do_outfmt = TFC_OUTFMT_B64;
 528                                 break;
 529                         case 'W':
 530                                 do_outfmt = TFC_OUTFMT_RAW;
 531                                 break;
 532                         case 'H':
 533                                 do_outfmt = TFC_OUTFMT_HEX;
 534                                 break;
 535                         case 'q':
 536                                 quiet = YES;
 537                                 verbose = NO;
 538                                 do_full_hexdump = NO;
 539                                 status_timer = 0;
 540                                 break;
 541                         case 'v':
 542                                 verbose = YES;
 543                                 break;
 544                         case 'V':
 545                                 td = strtod(optarg, &stoi);
 546                                 status_timer = TFC_DTOUSECS(td);
 547                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 548                                 break;
 549                         default:
 550                                 usage();
 551                                 break;
 552                 }
 553         }
 554
 555         if (!strcmp(progname, "tfbench")) {
 556                 if (!*(argv+optind)) usage();
 557
 558                 td = strtod(*(argv+optind), &stoi);
 559                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 560                         xerror(NO, YES, YES,
 561                         "%s: invalid benchmark time in seconds", *(argv+optind));
 562                 bench_timer = TFC_DTOUSECS(td);
 563                 do_benchmark(bench_timer, td);
 564         }
 565         if (genrandom_nr_bytes) {
 566                 ctr_mode = TFC_MODE_STREAM;
 567                 do_edcrypt = TFC_DO_ENCRYPT;
 568                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 569         }
 570         if (genzero_nr_bytes) {
 571                 ctr_mode = TFC_MODE_PLAIN;
 572                 do_edcrypt = TFC_DO_PLAIN;
 573                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 574         }
 575
 576         if (rawkey && password)
 577                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 578         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 579                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 580         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 581                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 582         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 583                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 584         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 585                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 586         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 587                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 588         if (ctr_mode == TFC_MODE_PLAIN
 589         && (do_edcrypt || do_mac || rawkey
 590         || mackey_opt || counter_opt || counter_file))
 591                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 592
 593         errno = 0;
 594         do_stop = NO;
 595
 596         if (saltf) {
 597                 int saltfd;
 598
 599                 memset(tfc_salt, 0, TFC_MAX_SALT);
 600                 tfc_saltsz = 0;
 601                 if (!strcasecmp(saltf, "disable")) goto _nosalt;
 602
 603                 if (!strcmp(saltf, "-")) saltfd = 0;
 604                 else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
 605                 if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
 606                 lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
 607                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
 608                 tfc_saltsz = lio;
 609                 xclose(saltfd);
 610         }
 611
 612 _nosalt:
 613         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 614                 int mkfd = -1;
 615                 tfc_yesno do_stop;
 616
 617                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 618                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 619                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 620
 621                 skein_init(&sk, TFC_KEY_BITS);
 622
 623                 do_stop = NO;
 624                 while (1) {
 625                         if (do_stop) break;
 626                         pblk = tmpdata;
 627                         ldone = 0;
 628                         lrem = lblock = sizeof(tmpdata);
 629                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 630 _mkragain:              lio = xread(mkfd, pblk, lrem);
 631                         if (lio == 0) do_stop = YES;
 632                         if (lio != NOSIZE) ldone += lio;
 633                         else {
 634                                 if (errno != EIO && catch_all_errors != YES)
 635                                         xerror(NO, NO, NO, "%s", mackeyf);
 636                                 switch (error_action) {
 637                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 638                                         case TFC_ERRACT_SYNC:
 639                                         case TFC_ERRACT_LSYNC:
 640                                                 xerror(YES, NO, NO, "%s", mackeyf);
 641                                                 lio = ldone = lrem = lblock;
 642                                                 memset(tmpdata, 0, lio);
 643                                                 if (rdpos == NOFSIZE) lseek(mkfd, lio, SEEK_CUR);
 644                                                 else lseek(mkfd, rdpos + lio, SEEK_SET);
 645                                                 break;
 646                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 647                                 }
 648                         }
 649                         if (lio && lio < lrem) {
 650                                 pblk += lio;
 651                                 lrem -= lio;
 652                                 goto _mkragain;
 653                         }
 654
 655                         skein_update(&sk, tmpdata, ldone);
 656                 }
 657
 658                 skein_final(mackey, &sk);
 659
 660                 xclose(mkfd);
 661         }
 662         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 663                 memset(&getps, 0, sizeof(struct getpasswd_state));
 664                 getps.fd = getps.efd = -1;
 665                 getps.passwd = pwdask;
 666                 getps.pwlen = sizeof(pwdask)-1;
 667                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 668                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 669                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 670                 getps.flags = GETP_WAITFILL;
 671                 n = xgetpasswd(&getps);
 672                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 673                 if (n == ((size_t)-2)) xexit(1);
 674                 if (verbose) say_hint(pwdask, n, "MAC password hint");
 675                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 676         }
 677
 678
 679         if ((strlen(progname) <= 9)
 680         && ((!strcmp(progname, "sksum"))
 681         || ((!memcmp(progname, "sk", 2))
 682         && (!memcmp(progname+3, "sum", 3)
 683         || !memcmp(progname+4, "sum", 3)
 684         || !memcmp(progname+5, "sum", 3)
 685         || !memcmp(progname+6, "sum", 3)))))
 686                 do_sksum(progname, argv+optind);
 687         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 688
 689         idx = optind;
 690
 691         if (argv[idx]) {
 692                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 693                 if (!strcmp(argv[idx], "-")) kfd = 0;
 694                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 695                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 696
 697                 lio = strnlen(argv[idx], PATH_MAX);
 698                 memset(argv[idx], '*', lio);
 699
 700                 idx++;
 701         }
 702         else password = YES;
 703
 704         errno = 0;
 705         if (do_full_key == NO && tweakf) {
 706                 int twfd;
 707
 708                 if (!strcmp(tweakf, "-")) twfd = 0;
 709                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 710                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 711                 lio = ldone = xread(twfd, tweak, TF_TWEAK_SIZE);
 712                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 713                 if (ldone < TF_TWEAK_SIZE)
 714                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, TF_TWEAK_SIZE);
 715                 xclose(twfd);
 716         }
 717
 718 _nokeyfd:
 719         errno = 0;
 720         if (argv[idx]) {
 721                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 722                 else {
 723                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 724                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 725                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 726                 }
 727                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 728
 729                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 730                         if (verbose) tfc_esay("%s: disabling signature verification on "
 731                                 "requested partial decryption.", progname);
 732                         do_mac = NO;
 733                 }
 734
 735                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 736                         maxlen = tfc_fdsize(sfd);
 737                         if (maxlen == NOFSIZE)
 738                                 xerror(NO, YES, YES,
 739                                 "Cannot verify embedded MAC with non-seekable source!");
 740                         maxlen -= TF_FROM_BITS(macbits);
 741                 }
 742                 srcfname = argv[idx];
 743                 idx++;
 744         }
 745
 746         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 747                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 748
 749         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 750         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 751
 752         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 753         errno = 0;
 754         if (counter_file) {
 755                 int ctrfd;
 756
 757                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 758                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 759                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 760                 lio = xread(ctrfd, ctr, ctrsz);
 761                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 762                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 763                 xclose(ctrfd);
 764         }
 765         else if (counter_opt == TFC_CTR_HEAD) {
 766                 pblk = ctr;
 767                 ldone = 0;
 768                 lrem = lblock = ctrsz;
 769                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 770 _ctrragain:     lio = xread(sfd, pblk, lrem);
 771                 if (lio != NOSIZE) ldone += lio;
 772                 else {
 773                         if (errno != EIO && catch_all_errors != YES)
 774                                 xerror(NO, NO, NO, "%s", srcfname);
 775                         switch (error_action) {
 776                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 777                                 case TFC_ERRACT_SYNC:
 778                                 case TFC_ERRACT_LSYNC:
 779                                         xerror(YES, NO, NO, "%s", srcfname);
 780                                         lio = ldone = lrem = lblock;
 781                                         memset(ctr, 0, lio);
 782                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
 783                                         else lseek(sfd, rdpos + lio, SEEK_SET);
 784                                         break;
 785                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 786                         }
 787                 }
 788                 if (lio && lio < lrem) {
 789                         pblk += lio;
 790                         lrem -= lio;
 791                         goto _ctrragain;
 792                 }
 793                 total_processed_src += ldone;
 794         }
 795
 796 _ctrskip1:
 797         if (iseek) {
 798                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 799                         iseek += ctrsz;
 800                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 801                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", srcfname);
 802         }
 803
 804         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 805
 806         if (verbose) tfc_esay("%s: hashing password", progname);
 807
 808         if (rawkey == TFC_RAWKEY_KEYFILE) {
 809                 tfc_yesno xtskeyset = NO;
 810
 811                 pblk = key;
 812 _xts2key:       ldone = 0;
 813                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 814                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(kfd);
 815 _keyragain:     lio = xread(kfd, pblk, lrem);
 816                 if (lio != NOSIZE) ldone += lio;
 817                 else {
 818                         if (errno != EIO && catch_all_errors != YES)
 819                                 xerror(NO, NO, NO, "reading key");
 820                         switch (error_action) {
 821                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 822                                 case TFC_ERRACT_SYNC:
 823                                 case TFC_ERRACT_LSYNC:
 824                                         xerror(YES, NO, NO, "reading key");
 825                                         lio = ldone = lrem = lblock;
 826                                         memset(key, 0, lio);
 827                                         if (rdpos == NOFSIZE) lseek(kfd, lio, SEEK_CUR);
 828                                         else lseek(kfd, rdpos + lio, SEEK_SET);
 829                                         break;
 830                                 default: xerror(NO, NO, NO, "reading key"); break;
 831                         }
 832                 }
 833                 if (lio && lio < lrem) {
 834                         pblk += lio;
 835                         lrem -= lio;
 836                         goto _keyragain;
 837                 }
 838                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 839
 840                 if (ctr_mode == TFC_MODE_XTS) {
 841                         if (xtskeyset == NO) {
 842                                 pblk = xtskey;
 843                                 xtskeyset = YES;
 844                                 goto _xts2key;
 845                         }
 846                 }
 847         }
 848         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 849                 tfc_yesno xtskeyset = NO;
 850
 851                 pblk = key; n = sizeof(key);
 852 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 853                 getps.fd = getps.efd = -1;
 854                 getps.passwd = (char *)pblk;
 855                 getps.pwlen = n;
 856                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 857                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 858                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 859                 getps.flags = GETP_WAITFILL;
 860                 n = xgetpasswd(&getps);
 861                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 862                 if (n == ((size_t)-2)) xexit(1);
 863                 if (verbose) say_hint(pblk, n, "Raw string key hint");
 864                 if (ctr_mode == TFC_MODE_XTS) {
 865                         if (xtskeyset == NO) {
 866                                 pblk = xtskey; n = sizeof(xtskey);
 867                                 xtskeyset = YES;
 868                                 goto _xts2keyaskstr;
 869                         }
 870                 }
 871         }
 872         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 873                 tfc_yesno xtskeyset = NO;
 874
 875                 pblk = key;
 876 _rawkey_hex_again:
 877                 memset(&getps, 0, sizeof(struct getpasswd_state));
 878                 getps.fd = getps.efd = -1;
 879                 getps.passwd = pwdask;
 880                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 881                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 882                 getps.charfilter = (show_secrets == YES) ? getps_plain_hex_filter : getps_hex_filter;
 883                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 884                 getps.flags = GETP_WAITFILL;
 885                 n = xgetpasswd(&getps);
 886                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 887                 if (n == ((size_t)-2)) xexit(1);
 888                 if (n % 2) {
 889                         tfc_esay("Please input even number of hex digits!");
 890                         goto _rawkey_hex_again;
 891                 }
 892                 hex2bin(pblk, pwdask);
 893                 memset(pwdask, 0, sizeof(pwdask));
 894                 if (verbose) say_hint(pblk, n/2, "Raw hex key hint");
 895                 if (ctr_mode == TFC_MODE_XTS) {
 896                         if (xtskeyset == NO) {
 897                                 pblk = xtskey;
 898                                 xtskeyset = YES;
 899                                 goto _rawkey_hex_again;
 900                         }
 901                 }
 902         }
 903         else if (password) {
 904 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 905                 getps.fd = getps.efd = -1;
 906                 getps.passwd = pwdask;
 907                 getps.pwlen = sizeof(pwdask)-1;
 908                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 909                 getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
 910                 getps.maskchar = (show_secrets == YES) ? 0 : 'x';
 911                 getps.flags = GETP_WAITFILL;
 912                 n = xgetpasswd(&getps);
 913                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 914                 if (n == ((size_t)-2)) xexit(1);
 915                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 916                         getps.fd = getps.efd = -1;
 917                         getps.passwd = pwdagain;
 918                         getps.pwlen = sizeof(pwdagain)-1;
 919                         getps.echo = "Enter it again: ";
 920                         getps.flags = GETP_WAITFILL;
 921                         n = xgetpasswd(&getps);
 922                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 923                         if (n == ((size_t)-2)) xexit(1);
 924                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 925                                 tfc_esay("Passwords are different, try again");
 926                                 goto _pwdagain;
 927                         }
 928                 }
 929                 if (verbose) say_hint(pwdask, n, "Password hint");
 930                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 931                 memset(pwdask, 0, sizeof(pwdask));
 932                 memset(pwdagain, 0, sizeof(pwdagain));
 933         }
 934         else {
 935                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, keyoffset, maxkeylen) != YES)
 936                         xerror(NO, NO, YES, "hashing key");
 937         }
 938
 939         if (rawkey == NO) {
 940                 if (tfc_saltsz > 0) {
 941                         memcpy(tfc_salt+tfc_saltsz, key, TF_FROM_BITS(TFC_KEY_BITS));
 942                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, tfc_salt, tfc_saltsz+TF_FROM_BITS(TFC_KEY_BITS));
 943                 }
 944                 if (nr_turns > 1) for (x = 0; x < nr_turns; x++)
 945                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 946                 memset(tfc_salt, 0, TFC_MAX_SALT);
 947         }
 948
 949         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 950                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 951         }
 952
 953         if (genkeyf) {
 954                 int krfd;
 955                 tfc_yesno xtskeyset = NO;
 956
 957                 pblk = key;
 958                 if (!strcmp(genkeyf, "-")) krfd = 1;
 959                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 960                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 961 _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
 962                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 963                 if (verbose && xtskeyset == NO) {
 964                         tfc_esay("%s: password hashing done", progname);
 965                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 966                         tfc_esay("%s: Have a nice day!", progname);
 967                 }
 968
 969                 if (ctr_mode == TFC_MODE_XTS) {
 970                         if (xtskeyset == NO) {
 971                                 pblk = xtskey;
 972                                 xtskeyset = YES;
 973                                 goto _xts2genkey;
 974                         }
 975                 }
 976
 977                 fchmod(krfd, 0600);
 978                 xclose(krfd);
 979                 xexit(0);
 980         }
 981
 982         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 983                 if (verbose) tfc_esay("%s: disabling signature verification on "
 984                         "requested partial decryption.", progname);
 985                 do_mac = NO;
 986         }
 987
 988         if (do_mac != NO) {
 989                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 990                 if (ctr_mode < TFC_MODE_OCB) {
 991                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 992                                 "will be slower.", progname);
 993                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 994                         else skein_init(&sk, macbits);
 995                 }
 996         }
 997
 998         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 999                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
1000         }
1001
1002         tf_convkey(key);
1003         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
1004         if (do_full_key == NO) {
1005                 if (!tweakf) skein(tweak, TF_NR_TWEAK_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
1006                 tf_tweak_set(key, tweak);
1007         }
1008         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
1009
1010         if (counter_opt == TFC_CTR_ZERO) memset(ctr, 0, ctrsz);
1011
1012         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
1013         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
1014
1015         if (counter_opt == TFC_CTR_SHOW) {
1016                 switch (do_outfmt) {
1017                         case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
1018                         case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
1019                         case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
1020                 }
1021         }
1022         else if (counter_opt == TFC_CTR_RAND) tfc_getrandom(ctr, ctrsz);
1023
1024 _ctrskip2:
1025         if (kfd != -1) {
1026                 xclose(kfd);
1027                 kfd = -1;
1028         }
1029         if (verbose) tfc_esay("%s: password hashing done", progname);
1030
1031         if (overwrite_source && srcfname) argv[idx] = srcfname;
1032
1033 _plain:
1034         if (argv[idx]) {
1035                 if (!strcmp(argv[idx], "-")) dfd = 1;
1036                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
1037                 if (dfd == -1) {
1038                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1039                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
1040                 }
1041                 dstfname = argv[idx];
1042                 idx++;
1043         }
1044
1045         if (oseek) {
1046                 if (lseek(dfd, oseek, SEEK_SET) == -1)
1047                         xerror(ignore_seek_errors, NO, NO, "%s: seek failed", dstfname);
1048         }
1049
1050         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
1051         memset(&sigact, 0, sizeof(sigact));
1052         sigact.sa_flags = SA_RESTART;
1053         sigact.sa_handler = print_crypt_status;
1054         sigaction(SIGUSR1, &sigact, NULL);
1055         sigaction(SIGTSTP, &sigact, NULL);
1056         sigaction(SIGALRM, &sigact, NULL);
1057         if (status_timer) setup_next_alarm(status_timer);
1058         sigact.sa_handler = change_status_width;
1059         sigaction(SIGQUIT, &sigact, NULL);
1060         sigact.sa_handler = change_status_timer;
1061         sigaction(SIGUSR2, &sigact, NULL);
1062         if (quiet == NO) {
1063                 sigact.sa_handler = print_crypt_status;
1064                 sigaction(SIGINT, &sigact, NULL);
1065                 sigaction(SIGTERM, &sigact, NULL);
1066         }
1067         else {
1068                 sigact.sa_handler = exit_sigterm;
1069                 sigaction(SIGINT, &sigact, NULL);
1070                 sigaction(SIGTERM, &sigact, NULL);
1071         }
1072         memset(&sigact, 0, sizeof(struct sigaction));
1073
1074         tfc_getcurtime(&delta_time);
1075
1076         errno = 0;
1077         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
1078                 pblk = ctr;
1079                 lio = lrem = ctrsz;
1080                 ldone = 0;
1081 _ctrwagain:     lio = xwrite(dfd, pblk, lrem);
1082                 if (lio != NOSIZE) ldone += lio;
1083                 else xerror(NO, NO, NO, "%s", dstfname);
1084                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1085                 if (lio < lrem) {
1086                         pblk += lio;
1087                         lrem -= lio;
1088                         goto _ctrwagain;
1089                 }
1090                 total_processed_dst += ldone;
1091                 delta_processed += ldone;
1092         }
1093
1094         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
1095
1096         errno = 0;
1097         do_stop = NO;
1098         while (1) {
1099                 if (do_stop) break;
1100                 pblk = srcblk;
1101                 ldone = 0;
1102                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
1103                 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1104 _ragain:        lio = xread(sfd, pblk, lrem);
1105                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
1106                 if (lio != NOSIZE) ldone += lio;
1107                 else {
1108                         if (errno != EIO && catch_all_errors != YES)
1109                                 xerror(NO, NO, NO, "%s", srcfname);
1110                         switch (error_action) {
1111                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
1112                                 case TFC_ERRACT_SYNC:
1113                                 case TFC_ERRACT_LSYNC:
1114                                         xerror(YES, NO, NO, "%s", srcfname);
1115                                         lio = ldone = lrem = lblock;
1116                                         memset(srcblk, 0, lio);
1117                                         if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1118                                         else lseek(sfd, rdpos + lio, SEEK_SET);
1119                                         break;
1120                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
1121                         }
1122                 }
1123                 if (lio && lio < lrem) {
1124                         pblk += lio;
1125                         lrem -= lio;
1126                         goto _ragain;
1127                 }
1128                 total_processed_src += ldone;
1129
1130                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
1131                         size_t orig = ldone;
1132                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
1133                         if (ldone > blksize) ldone = blksize;
1134                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
1135                 }
1136
1137                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
1138                         skein_update(&sk, srcblk, ldone);
1139
1140                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
1141                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
1142                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
1143                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1144                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
1145                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
1146                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
1147                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
1148                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
1149                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
1150                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
1151                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
1152                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
1153                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
1154
1155                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
1156                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
1157                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
1158                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
1159
1160                 else if (ctr_mode == TFC_MODE_PLAIN)
1161                         memcpy(dstblk, srcblk, ldone);
1162
1163                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1164                         skein_update(&sk, dstblk, ldone);
1165                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1166
1167                 pblk = dstblk;
1168                 lrem = ldone;
1169                 ldone = 0;
1170 _wagain:        lio = xwrite(dfd, pblk, lrem);
1171                 if (lio != NOSIZE) ldone += lio;
1172                 else xerror(NO, NO, NO, "%s", dstfname);
1173                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1174                 if (lio < lrem) {
1175                         pblk += lio;
1176                         lrem -= lio;
1177                         goto _wagain;
1178                 }
1179 _nowrite:       total_processed_dst += ldone;
1180                 delta_processed += ldone;
1181
1182                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1183         }
1184
1185         if (do_stop == TFC_STOP_FULL) goto _nomac;
1186
1187         errno = 0;
1188         if (do_mac >= TFC_MAC_VRFY) {
1189                 if (!do_mac_file) {
1190                         pblk = macvrfy;
1191                         ldone = 0;
1192                         lrem = lblock = TF_FROM_BITS(macbits);
1193                         if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
1194 _macragain:             lio = xread(sfd, pblk, lrem);
1195                         if (lio != NOSIZE) ldone += lio;
1196                         else {
1197                                 if (errno != EIO && catch_all_errors != YES)
1198                                         xerror(NO, NO, NO, "%s", srcfname);
1199                                 switch (error_action) {
1200                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1201                                         case TFC_ERRACT_SYNC:
1202                                         case TFC_ERRACT_LSYNC:
1203                                                 xerror(YES, NO, NO, "%s", srcfname);
1204                                                 lio = ldone = lrem = lblock;
1205                                                 memset(macvrfy, 0, lio);
1206                                                 if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
1207                                                 else lseek(sfd, rdpos + lio, SEEK_SET);
1208                                                 break;
1209                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1210                                 }
1211                         }
1212                         if (lio && lio < lrem) {
1213                                 pblk += lio;
1214                                 lrem -= lio;
1215                                 goto _macragain;
1216                         }
1217                         total_processed_src += ldone;
1218                 }
1219                 else {
1220                         int mfd;
1221
1222                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1223                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1224                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1225                         lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
1226                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1227                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1228                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1229                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1230                                 lio = TF_FROM_BITS(macbits);
1231                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1232                         }
1233                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1234                         xclose(mfd);
1235                 }
1236
1237                 if (ldone < TF_FROM_BITS(macbits)) {
1238                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1239                                 "not verifying", progname, ldone);
1240                         exitcode = 1;
1241                         goto _shortmac;
1242                 }
1243
1244                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1245                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1246
1247                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1248                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1249                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1250                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1251                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1252                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1253
1254                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1255                         if (quiet == NO) {
1256                                 tfc_esay("%s: signature is good", progname);
1257                                 if (verbose) {
1258                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1259                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1260                                 }
1261                         }
1262                 }
1263                 else {
1264                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1265                                 "wrong password, key, mode, or file is not signed", progname);
1266                         exitcode = 1;
1267                 }
1268
1269 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1270                 memset(macresult, 0, sizeof(macresult));
1271                 memset(tmpdata, 0, sizeof(tmpdata));
1272         }
1273
1274         else if (do_mac == TFC_MAC_SIGN) {
1275                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1276                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1277
1278                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1279                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1280                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1281                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1282                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1283                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1284                 memset(macresult, 0, sizeof(macresult));
1285
1286                 if (!do_mac_file) {
1287                         pblk = tmpdata;
1288                         lio = lrem = TF_FROM_BITS(macbits);
1289                         ldone = 0;
1290 _macwagain:             lio = xwrite(dfd, pblk, lrem);
1291                         if (lio != NOSIZE) ldone += lio;
1292                         else xerror(NO, NO, NO, "%s", dstfname);
1293                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1294                         if (lio < lrem) {
1295                                 pblk += lio;
1296                                 lrem -= lio;
1297                                 goto _macwagain;
1298                         }
1299                         total_processed_dst += ldone;
1300                         delta_processed += ldone;
1301                 }
1302                 else {
1303                         int mfd;
1304
1305                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1306                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1307                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1308                         if (do_outfmt == TFC_OUTFMT_B64) {
1309                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1310                                 memset(tmpdata, 0, TFC_TMPSIZE);
1311                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1312                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1313                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1314                                 if (lrem) {
1315                                         tmpdata[lrem] = '\n';
1316                                         lrem++;
1317                                 }
1318                                 lio = xwrite(mfd, tmpdata, lrem);
1319                         }
1320                         else lio = xwrite(mfd, tmpdata, TF_FROM_BITS(macbits));
1321                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1322                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1323                         xclose(mfd);
1324                 }
1325
1326                 memset(macvrfy, 0, sizeof(macvrfy));
1327                 memset(macresult, 0, sizeof(macresult));
1328                 memset(tmpdata, 0, sizeof(tmpdata));
1329         }
1330
1331 _nomac:
1332         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1333
1334         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1335         xclose(sfd);
1336         if (ftrunc_dfd != NOFSIZE) if (ftruncate(dfd, (off_t)ftrunc_dfd) == -1) xerror(YES, NO, YES, "ftruncate(%d)", dfd);
1337         xclose(dfd);
1338
1339         xexit(exitcode);
1340         return -1;
1341 }