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 int main(int argc, char **argv)
  55 {
  56         int c;
  57         double td;
  58         char *s, *d, *t, *stoi;
  59         size_t x, n;
  60
  61         progname = basename(argv[0]);
  62
  63         if (!isatty(2)) do_statline_dynamic = NO;
  64
  65         opterr = 0;
  66         while ((c = getopt(argc, argv, "aU:C:r:K:t:TPkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
  67                 switch (c) {
  68                         case 'r':
  69                                 randsource = optarg;
  70                                 break;
  71                         case 'c':
  72                                 if (!strcasecmp(optarg, "show"))
  73                                         counter_opt = TFC_CTR_SHOW;
  74                                 else if (!strcasecmp(optarg, "head"))
  75                                         counter_opt = TFC_CTR_HEAD;
  76                                 else if (!strcasecmp(optarg, "rand"))
  77                                         counter_opt = TFC_CTR_RAND;
  78                                 else counter_file = sksum_hashlist_file = optarg;
  79                                 break;
  80                         case 'C':
  81                                 if (!strcasecmp(optarg, "ctr"))
  82                                         ctr_mode = TFC_MODE_CTR;
  83                                 else if (!strcasecmp(optarg, "stream"))
  84                                         ctr_mode = TFC_MODE_STREAM;
  85                                 else if (!strcasecmp(optarg, "cbc"))
  86                                         ctr_mode = TFC_MODE_CBC;
  87                                 else if (!strcasecmp(optarg, "ecb"))
  88                                         ctr_mode = TFC_MODE_ECB;
  89                                 else if (!strcasecmp(optarg, "xts"))
  90                                         ctr_mode = TFC_MODE_XTS;
  91                                 else if (!strcasecmp(optarg, "ocb"))
  92                                         ctr_mode = TFC_MODE_OCB;
  93                                 else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
  94                                 break;
  95                         case 'P':
  96                                 do_edcrypt = TFC_DO_PLAIN;
  97                                 password = YES;
  98                                 ctr_mode = TFC_MODE_PLAIN;
  99                                 break;
 100                         case 'e':
 101                                 do_edcrypt = TFC_DO_ENCRYPT;
 102                                 break;
 103                         case 'd':
 104                                 do_edcrypt = TFC_DO_DECRYPT;
 105                                 break;
 106                         case 'D':
 107                                 macbits = strtoul(optarg, &stoi, 10);
 108                                 if (macbits == 0 || !str_empty(stoi) || macbits < 8
 109                                 || macbits > TF_MAX_BITS || macbits % 8)
 110                                         xerror(NO, YES, YES, "%s: invalid MAC bits setting", optarg);
 111                                 break;
 112                         case 'n':
 113                                 nr_turns = sksum_turns = strtoul(optarg, &stoi, 10);
 114                                 if (!str_empty(stoi)) xerror(NO, YES, YES, "%s: invalid number of turns", optarg);
 115                                 break;
 116                         case 'U':
 117                                 if (!strcasecmp(optarg, "key"))
 118                                         mackey_opt = TFC_MACKEY_RAWKEY;
 119                                 else if (!strcasecmp(optarg, "pwd"))
 120                                         mackey_opt = TFC_MACKEY_PASSWORD;
 121                                 else {
 122                                         mackey_opt = TFC_MACKEY_FILE;
 123                                         mackeyf = optarg;
 124                                 }
 125                                 break;
 126                         case 'p':
 127                                 password = YES;
 128                                 break;
 129                         case 'k':
 130                                 rawkey = TFC_RAWKEY_KEYFILE;
 131                                 break;
 132                         case 'z':
 133                                 rawkey = TFC_RAWKEY_ASKSTR;
 134                                 break;
 135                         case 'x':
 136                                 rawkey = TFC_RAWKEY_ASKHEX;
 137                                 break;
 138                         case 'K':
 139                                 verbose = YES;
 140                                 genkeyf = optarg;
 141                                 break;
 142                         case 't':
 143                                 tweakf = optarg;
 144                                 break;
 145                         case 'T':
 146                                 do_tfcrypt1 = YES;
 147                                 break;
 148                         case 'l':
 149                                 if (maxlen != NOFSIZE) break;
 150
 151                                 maxlen = tfc_humanfsize(optarg, &stoi);
 152                                 if (!str_empty(stoi)) {
 153                                         maxlen = tfc_fnamesize(optarg, YES);
 154                                         maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 155                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 156                                         "%s: invalid count value", optarg);
 157                                 }
 158                                 else maxlen = tfc_modifysize(maxlen, strchr(optarg, ':'));
 159                                 if (counter_opt == TFC_CTR_HEAD)
 160                                         maxlen += TF_BLOCK_SIZE;
 161                                 break;
 162                         case 'w':
 163                                 overwrite_source = YES;
 164                                 break;
 165                         case 'E':
 166                                 if (!strcmp(optarg, "xall")) {
 167                                         catch_all_errors = YES;
 168                                         break;
 169                                 }
 170                                 if (!strcmp(optarg, "exit"))
 171                                         error_action = TFC_ERRACT_EXIT;
 172                                 else if (!strncmp(optarg, "cont", 4))
 173                                         error_action = TFC_ERRACT_CONT;
 174                                 else if (!strcmp(optarg, "sync"))
 175                                         error_action = TFC_ERRACT_SYNC;
 176                                 else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
 177                                 break;
 178                         case 'O':
 179                                 s = d = optarg; t = NULL;
 180                                 while ((s = strtok_r(d, ",", &t))) {
 181                                         if (d) d = NULL;
 182                                         if (!strcmp(s, "sync"))
 183                                                 write_flags |= O_SYNC;
 184                                         else if (!strcmp(s, "trunc"))
 185                                                 write_flags |= O_TRUNC;
 186                                         else if (!strcmp(s, "fsync"))
 187                                                 do_fsync = YES;
 188                                         else if (!strcmp(s, "pad"))
 189                                                 do_pad = YES;
 190                                         else if (!strcmp(s, "xtime"))
 191                                                 do_preserve_time = YES;
 192                                         else if (!strcmp(s, "gibsize"))
 193                                                 do_stats_in_gibs = YES;
 194                                         else if (!strcmp(s, "plainstats"))
 195                                                 do_statline_dynamic = NO;
 196                                         else if (!strcmp(s, "statless"))
 197                                                 do_less_stats = YES;
 198                                         else if (!strcmp(s, "norepeat"))
 199                                                 no_repeat = YES;
 200                                         else if (!strncmp(s, "prompt", 6) && *(s+6) == '=')
 201                                                 pw_prompt = s+7;
 202                                         else if (!strncmp(s, "macprompt", 9) && *(s+9) == '=')
 203                                                 mac_pw_prompt = s+10;
 204                                         else if (!strcmp(s, "shorthex"))
 205                                                 do_full_hexdump = NO;
 206                                         else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 207                                                 s += 5;
 208                                                 blksize = (size_t)tfc_humanfsize(s, &stoi);
 209                                                 if (!str_empty(stoi)) {
 210                                                         blksize = (size_t)tfc_fnamesize(s, YES);
 211                                                         blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 212                                                         if (blksize == NOSIZE) xerror(NO, YES, YES,
 213                                                         "%s: invalid block size value", s);
 214                                                 }
 215                                                 else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
 216                                                 if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
 217                                                         "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
 218                                                 if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
 219                                                         "%s: block size exceeds %u bytes",
 220                                                         s, TFC_U(TFC_BLKSIZE));
 221                                         }
 222                                         else if (!strncmp(s, "xtsblocks", 9) && *(s+9) == '=') {
 223                                                 s += 10;
 224                                                 xtsblocks = (size_t)tfc_humanfsize(s, &stoi);
 225                                                 if (!str_empty(stoi)) {
 226                                                         xtsblocks = (size_t)tfc_fnamesize(s, YES);
 227                                                         xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 228                                                         if (xtsblocks == NOSIZE) xerror(NO, YES, YES,
 229                                                         "%s: invalid blocks per xts block value", s);
 230                                                 }
 231                                                 else xtsblocks = (size_t)tfc_modifysize((tfc_fsize)xtsblocks, strchr(s, ':'));
 232                                                 if (TFC_BLKSIZE % xtsblocks) xerror(NO, YES, YES,
 233                                                         "%s: nr of blocks per xts block is not round to %u bytes",
 234                                                         s, TFC_U(TFC_BLKSIZE));
 235                                                 if ((xtsblocks * TF_BLOCK_SIZE) > TFC_BLKSIZE) xerror(NO, YES, YES,
 236                                                         "%s: nr of blocks per xts block exceeds %u bytes",
 237                                                         s, TFC_U(TFC_BLKSIZE));
 238                                         }
 239                                         else if (!strncmp(s, "iseek", 5) && *(s+5) == '=') {
 240                                                 s += 6;
 241                                                 iseek = tfc_humanfsize(s, &stoi);
 242                                                 if (!str_empty(stoi)) {
 243                                                         iseek = tfc_fnamesize(s, YES);
 244                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 245                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 246                                                         "%s: invalid iseek value", s);
 247                                                 }
 248                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 249                                                 if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
 250                                                         xerror(NO, YES, YES,
 251                                                                 "%s: not round to TF block size "
 252                                                                 "of %u bytes",
 253                                                                 s, TFC_U(TF_BLOCK_SIZE));
 254                                                 iseek_blocks = iseek / TF_BLOCK_SIZE;
 255                                         }
 256                                         else if (!strncmp(s, "ixseek", 6) && *(s+6) == '=') {
 257                                                 s += 7;
 258                                                 iseek = tfc_humanfsize(s, &stoi);
 259                                                 if (!str_empty(stoi)) {
 260                                                         iseek = tfc_fnamesize(s, YES);
 261                                                         iseek = tfc_modifysize(iseek, strchr(s, ':'));
 262                                                         if (iseek == NOFSIZE) xerror(NO, YES, YES,
 263                                                                 "%s: invalid ixseek value", s);
 264                                                 }
 265                                                 else iseek = tfc_modifysize(iseek, strchr(s, ':'));
 266                                         }
 267                                         else if (!strncmp(s, "ictr", 4) && *(s+4) == '=') {
 268                                                 s += 5;
 269                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 270                                                 if (!str_empty(stoi)) {
 271                                                         iseek_blocks = tfc_fnamesize(s, YES);
 272                                                         if (iseek_blocks == NOFSIZE)
 273                                                                 xerror(NO, YES, YES,
 274                                                                 "%s: invalid ictr value", s);
 275                                                         iseek_blocks /= TF_BLOCK_SIZE;
 276                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 277                                                 }
 278                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 279                                         }
 280                                         else if (!strncmp(s, "ixctr", 5) && *(s+5) == '=') {
 281                                                 s += 6;
 282                                                 iseek_blocks = tfc_humanfsize(s, &stoi);
 283                                                 if (!str_empty(stoi)) {
 284                                                         iseek_blocks = tfc_fnamesize(s, YES);
 285                                                         iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 286                                                         if (iseek_blocks == NOFSIZE)
 287                                                                 xerror(NO, YES, YES,
 288                                                                 "%s: invalid ixctr value", s);
 289                                                 }
 290                                                 else iseek_blocks = tfc_modifysize(iseek_blocks, strchr(s, ':'));
 291                                                 if (iseek_blocks % TF_BLOCK_SIZE)
 292                                                         xerror(NO, YES, YES,
 293                                                         "%s: not round to TF block size "
 294                                                         "of %u bytes", s, TFC_U(TF_BLOCK_SIZE));
 295                                                 iseek_blocks /= TF_BLOCK_SIZE;
 296                                         }
 297                                         else if (!strncmp(s, "oseek", 5) && *(s+5) == '=') {
 298                                                 s += 6;
 299                                                 oseek = tfc_humanfsize(s, &stoi);
 300                                                 if (!str_empty(stoi)) {
 301                                                         oseek = tfc_fnamesize(s, YES);
 302                                                         oseek = tfc_modifysize(oseek, strchr(s, ':'));
 303                                                         if (oseek == NOFSIZE) xerror(NO, YES, YES,
 304                                                         "%s: invalid oseek value", s);
 305                                                 }
 306                                                 else oseek = tfc_modifysize(oseek, strchr(s, ':'));
 307                                         }
 308                                         else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
 309                                                 s += 6;
 310                                                 maxlen = tfc_humanfsize(s, &stoi);
 311                                                 if (!str_empty(stoi)) {
 312                                                         maxlen = tfc_fnamesize(s, YES);
 313                                                         maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 314                                                         if (maxlen == NOFSIZE) xerror(NO, YES, YES,
 315                                                         "%s: invalid count value", s);
 316                                                 }
 317                                                 else maxlen = tfc_modifysize(maxlen, strchr(s, ':'));
 318                                                 if (counter_opt == TFC_CTR_HEAD)
 319                                                         maxlen += TF_BLOCK_SIZE;
 320                                         }
 321                                         else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
 322                                                 s += 5;
 323                                                 maxkeylen = tfc_humanfsize(s, &stoi);
 324                                                 if (!str_empty(stoi)) {
 325                                                         maxkeylen = (size_t)tfc_fnamesize(s, YES);
 326                                                         maxkeylen = (size_t)tfc_modifysize((tfc_fsize)maxkeylen, strchr(s, ':'));
 327                                                         if (maxkeylen == NOSIZE)
 328                                                                 xerror(NO, YES, YES,
 329                                                                 "%s: invalid key length value", s);
 330                                                 }
 331                                                 else maxkeylen = (size_t)tfc_modifysize((tfc_fsize)maxkeylen, strchr(s, ':'));
 332                                         }
 333                                         else if (!strncmp(s, "xctr", 4) && *(s+4) == '=') {
 334                                                 s += 5;
 335                                                 ctrsz = tfc_humanfsize(s, &stoi);
 336                                                 if (!str_empty(stoi)) {
 337                                                         ctrsz = (size_t)tfc_fnamesize(s, YES);
 338                                                         ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 339                                                         if (ctrsz == NOSIZE)
 340                                                                 xerror(NO, YES, YES,
 341                                                                 "%s: invalid counter length value", s);
 342                                                 }
 343                                                 else ctrsz = (size_t)tfc_modifysize((tfc_fsize)ctrsz, strchr(s, ':'));
 344                                                 if (ctrsz > TF_BLOCK_SIZE)
 345                                                         xerror(NO, YES, YES, "%s: counter size cannot exceed TF block size", s);
 346                                         }
 347                                         else xerror(NO, YES, YES, "invalid option %s", s);
 348                                 }
 349                                 break;
 350                         case 'S':
 351                                 do_mac = TFC_MAC_SIGN;
 352                                 if (strcasecmp(optarg, "mac") != 0)
 353                                         do_mac_file = optarg;
 354                                 break;
 355                         case 'M':
 356                                 do_mac = TFC_MAC_VRFY;
 357                                 if (!strcasecmp(optarg, "drop"))
 358                                         do_mac = TFC_MAC_DROP;
 359                                 else if (strcasecmp(optarg, "mac") != 0)
 360                                         do_mac_file = optarg;
 361                                 break;
 362                         case 'm':
 363                                 if (do_mac != TFC_MAC_VRFY)
 364                                         xerror(NO, YES, YES, "signature source was not specified");
 365                                 do_mac = TFC_MAC_JUST_VRFY;
 366                                 break;
 367                         case 'R':
 368                         case 'Z':
 369                                 if (maxlen != NOFSIZE) {
 370                                         if (c == 'Z') genzero_nr_bytes = maxlen;
 371                                         else genrandom_nr_bytes = maxlen;
 372                                 }
 373                                 else {
 374                                         tfc_fsize t;
 375                                         if (!strcasecmp(optarg, "cbs"))
 376                                                 t = TF_BLOCK_SIZE;
 377                                         else if (!strcasecmp(optarg, "ks"))
 378                                                 t = TF_FROM_BITS(TFC_KEY_BITS);
 379                                         else if (!strcasecmp(optarg, "xks"))
 380                                                 t = TF_FROM_BITS(TFC_KEY_BITS) * 2;
 381                                         else if (!strcasecmp(optarg, "iobs"))
 382                                                 t = blksize;
 383                                         else {
 384                                                 t = tfc_humanfsize(optarg, &stoi);
 385                                                 if (!str_empty(stoi)) {
 386                                                         t = tfc_fnamesize(optarg, NO);
 387                                                         t = tfc_modifysize(t, strchr(optarg, ':'));
 388                                                 }
 389                                                 else t = tfc_modifysize(t, strchr(optarg, ':'));
 390                                         }
 391                                         if (c == 'Z') genzero_nr_bytes = maxlen = t;
 392                                         else genrandom_nr_bytes = maxlen = t;
 393                                 }
 394                                 break;
 395                         case 'a':
 396                                 do_preserve_time = YES;
 397                                 break;
 398                         case 'A':
 399                                 do_outfmt = TFC_OUTFMT_B64;
 400                                 break;
 401                         case 'W':
 402                                 do_outfmt = TFC_OUTFMT_RAW;
 403                                 break;
 404                         case 'H':
 405                                 do_outfmt = TFC_OUTFMT_HEX;
 406                                 break;
 407                         case 'q':
 408                                 quiet = YES;
 409                                 verbose = NO;
 410                                 status_timer = 0;
 411                                 break;
 412                         case 'v':
 413                                 verbose = YES;
 414                                 break;
 415                         case 'V':
 416                                 td = strtod(optarg, &stoi);
 417                                 status_timer = TFC_DTOUSECS(td);
 418                                 if (status_timer <= TFC_DTOUSECS(0) || !str_empty(stoi)) status_timer = 0;
 419                                 break;
 420                         default:
 421                                 usage();
 422                                 break;
 423                 }
 424         }
 425
 426         if (!strcmp(progname, "tfbench")) {
 427                 if (!*(argv+optind)) usage();
 428
 429                 td = strtod(*(argv+optind), &stoi);
 430                 if (td <= TFC_DTOUSECS(0) || !str_empty(stoi))
 431                         xerror(NO, YES, YES,
 432                         "%s: invalid benchmark time in seconds", *(argv+optind));
 433                 bench_timer = TFC_DTOUSECS(td);
 434                 do_benchmark(bench_timer, td);
 435         }
 436         if (genrandom_nr_bytes) {
 437                 ctr_mode = TFC_MODE_STREAM;
 438                 do_edcrypt = TFC_DO_ENCRYPT;
 439                 gen_write_bytes(*(argv+optind), oseek, genrandom_nr_bytes);
 440         }
 441         if (genzero_nr_bytes) {
 442                 ctr_mode = TFC_MODE_PLAIN;
 443                 do_edcrypt = TFC_DO_PLAIN;
 444                 gen_write_bytes(*(argv+optind), oseek, genzero_nr_bytes);
 445         }
 446
 447         if (rawkey && password)
 448                 xerror(NO, YES, YES, "Cannot use rawkey and hashing password!");
 449         if (do_edcrypt == TFC_DO_ENCRYPT && do_mac >= TFC_MAC_VRFY)
 450                 xerror(NO, YES, YES, "Cannot encrypt and verify signature!");
 451         if (do_edcrypt == TFC_DO_DECRYPT && do_mac == TFC_MAC_SIGN)
 452                 xerror(NO, YES, YES, "Cannot decrypt and calculate signature!");
 453         if (do_edcrypt == TFC_DO_DECRYPT && counter_opt == TFC_CTR_RAND)
 454                 xerror(NO, YES, YES, "Cannot decrypt and embed a generated CTR into file!");
 455         if (do_edcrypt == TFC_DO_ENCRYPT && counter_opt == TFC_CTR_HEAD)
 456                 xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
 457         if (overwrite_source && counter_opt == TFC_CTR_RAND)
 458                 xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
 459         if (tweakf && do_tfcrypt1 == NO)
 460                 xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
 461         if (ctr_mode == TFC_MODE_PLAIN
 462         && (do_edcrypt || do_mac || rawkey
 463         || mackey_opt || counter_opt || counter_file))
 464                 xerror(NO, YES, YES, "Encryption facility is disabled when in plain IO mode.");
 465
 466         errno = 0;
 467         do_stop = NO;
 468
 469         if (mackey_opt == TFC_MACKEY_FILE && mackeyf) {
 470                 int mkfd = -1;
 471                 tfc_yesno do_stop;
 472
 473                 if (!strcmp(mackeyf, "-")) mkfd = 0;
 474                 else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
 475                 if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
 476
 477                 skein_init(&sk, TFC_KEY_BITS);
 478
 479                 do_stop = NO;
 480                 while (1) {
 481                         if (do_stop) break;
 482                         pblk = tmpdata;
 483                         ldone = 0;
 484                         lrem = lblock = sizeof(tmpdata);
 485 _mkragain:              lio = read(mkfd, pblk, lrem);
 486                         if (lio == 0) do_stop = YES;
 487                         if (lio != NOSIZE) ldone += lio;
 488                         else {
 489                                 if (errno != EIO && catch_all_errors != YES)
 490                                         xerror(NO, NO, NO, "%s", mackeyf);
 491                                 switch (error_action) {
 492                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", mackeyf); goto _mkragain; break;
 493                                         case TFC_ERRACT_SYNC:
 494                                                 xerror(YES, NO, NO, "%s", mackeyf);
 495                                                 lio = ldone = lrem = lblock;
 496                                                 memset(tmpdata, 0, lio);
 497                                                 lseek(mkfd, lio, SEEK_CUR);
 498                                                 break;
 499                                         default: xerror(NO, NO, NO, "%s", mackeyf); break;
 500                                 }
 501                         }
 502                         if (lio && lio < lrem) {
 503                                 pblk += lio;
 504                                 lrem -= lio;
 505                                 goto _mkragain;
 506                         }
 507
 508                         skein_update(&sk, tmpdata, ldone);
 509                 }
 510
 511                 skein_final(mackey, &sk);
 512
 513                 xclose(mkfd);
 514         }
 515         else if (mackey_opt == TFC_MACKEY_PASSWORD) {
 516                 memset(&getps, 0, sizeof(struct getpasswd_state));
 517                 getps.fd = getps.efd = -1;
 518                 getps.passwd = pwdask;
 519                 getps.pwlen = sizeof(pwdask)-1;
 520                 getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
 521                 getps.charfilter = getps_filter;
 522                 getps.maskchar = 'x';
 523                 getps.flags = GETP_WAITFILL;
 524                 n = xgetpasswd(&getps);
 525                 if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
 526                 if (n == ((size_t)-2)) xexit(1);
 527                 skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
 528                 if (verbose) {
 529                         skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
 530                         xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
 531                         tfc_nfsay(stderr, "MAC password hint: ");
 532                         mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
 533                         memset(tmpdata, 0, sizeof(tmpdata));
 534                 }
 535         }
 536
 537
 538         if ((strlen(progname) <= 9)
 539         && ((!strcmp(progname, "sksum"))
 540         || ((!memcmp(progname, "sk", 2))
 541         && (!memcmp(progname+3, "sum", 3)
 542         || !memcmp(progname+4, "sum", 3)
 543         || !memcmp(progname+5, "sum", 3)
 544         || !memcmp(progname+6, "sum", 3)))))
 545                 do_sksum(progname, argv+optind);
 546         if (!strcmp(progname, "tfbase64")) do_edbase64(argv+optind);
 547
 548         idx = optind;
 549
 550         if (argv[idx]) {
 551                 if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
 552                 if (!strcmp(argv[idx], "-")) kfd = 0;
 553                 else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 554                 if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 555
 556                 lio = strnlen(argv[idx], PATH_MAX);
 557                 memset(argv[idx], '*', lio);
 558
 559                 idx++;
 560         }
 561         else password = YES;
 562
 563         errno = 0;
 564         if (do_tfcrypt1 == YES && tweakf) {
 565                 int twfd;
 566
 567                 if (!strcmp(tweakf, "-")) twfd = 0;
 568                 else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
 569                 if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
 570                 lio = ldone = read(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
 571                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
 572                 if (ldone < 2*TF_SIZE_UNIT)
 573                         xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
 574                 xclose(twfd);
 575         }
 576
 577 _nokeyfd:
 578         errno = 0;
 579         if (argv[idx]) {
 580                 if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
 581                 else {
 582                         sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
 583                         if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
 584                                 xerror(YES, NO, YES, "stat(%s)", argv[idx]);
 585                 }
 586                 if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 587
 588                 if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
 589                         if (verbose) tfc_esay("%s: disabling signature verification on "
 590                                 "requested partial decryption.", progname);
 591                         do_mac = NO;
 592                 }
 593
 594                 if ((do_mac >= TFC_MAC_VRFY || do_mac == TFC_MAC_DROP) && !do_mac_file) {
 595                         maxlen = tfc_fdsize(sfd);
 596                         if (maxlen == NOFSIZE)
 597                                 xerror(NO, YES, YES,
 598                                 "Cannot verify embedded MAC with non-seekable source!");
 599                         maxlen -= TF_FROM_BITS(macbits);
 600                 }
 601                 srcfname = argv[idx];
 602                 idx++;
 603         }
 604
 605         if (!do_mac_file && (do_mac >= TFC_MAC_VRFY && sfd == 0))
 606                 xerror(NO, YES, YES, "Cannot verify embedded MAC with non-seekable source!");
 607
 608         if (ctrsz == NOSIZE) ctrsz = TF_BLOCK_SIZE;
 609         if (ctrsz > TF_BLOCK_SIZE) ctrsz = TF_BLOCK_SIZE;
 610
 611         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip1;
 612         errno = 0;
 613         if (counter_file) {
 614                 int ctrfd;
 615
 616                 if (!strcmp(counter_file, "-")) ctrfd = 0;
 617                 else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
 618                 if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
 619                 lio = read(ctrfd, ctr, ctrsz);
 620                 if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
 621                 if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
 622                 xclose(ctrfd);
 623         }
 624         else if (counter_opt == TFC_CTR_HEAD) {
 625                 pblk = ctr;
 626                 ldone = 0;
 627                 lrem = lblock = ctrsz;
 628 _ctrragain:     lio = read(sfd, pblk, lrem);
 629                 if (lio != NOSIZE) ldone += lio;
 630                 else {
 631                         if (errno != EIO && catch_all_errors != YES)
 632                                 xerror(NO, NO, NO, "%s", srcfname);
 633                         switch (error_action) {
 634                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ctrragain; break;
 635                                 case TFC_ERRACT_SYNC:
 636                                         xerror(YES, NO, NO, "%s", srcfname);
 637                                         lio = ldone = lrem = lblock;
 638                                         memset(ctr, 0, lio);
 639                                         lseek(sfd, lio, SEEK_CUR);
 640                                         break;
 641                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 642                         }
 643                 }
 644                 if (lio && lio < lrem) {
 645                         pblk += lio;
 646                         lrem -= lio;
 647                         goto _ctrragain;
 648                 }
 649                 total_processed_src += ldone;
 650         }
 651
 652 _ctrskip1:
 653         if (iseek) {
 654                 if (counter_opt == TFC_CTR_HEAD && ctr_mode != TFC_MODE_ECB)
 655                         iseek += ctrsz;
 656                 if (lseek(sfd, iseek, SEEK_SET) == -1)
 657                         xerror(YES, NO, NO, "%s: seek failed", srcfname);
 658         }
 659
 660         if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
 661
 662         if (verbose) tfc_esay("%s: hashing password", progname);
 663
 664         if (rawkey == TFC_RAWKEY_KEYFILE) {
 665                 tfc_yesno xtskeyset = NO;
 666
 667                 pblk = key;
 668 _xts2key:       ldone = 0;
 669                 lrem = lblock = TF_FROM_BITS(TFC_KEY_BITS);
 670 _keyragain:     lio = read(kfd, pblk, lrem);
 671                 if (lio != NOSIZE) ldone += lio;
 672                 else {
 673                         if (errno != EIO && catch_all_errors != YES)
 674                                 xerror(NO, NO, NO, "reading key");
 675                         switch (error_action) {
 676                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "reading key"); goto _keyragain; break;
 677                                 case TFC_ERRACT_SYNC:
 678                                         xerror(YES, NO, NO, "reading key");
 679                                         lio = ldone = lrem = lblock;
 680                                         memset(key, 0, lio);
 681                                         lseek(kfd, lio, SEEK_CUR);
 682                                         break;
 683                                 default: xerror(NO, NO, NO, "reading key"); break;
 684                         }
 685                 }
 686                 if (lio && lio < lrem) {
 687                         pblk += lio;
 688                         lrem -= lio;
 689                         goto _keyragain;
 690                 }
 691                 if (ldone < lblock) xerror(NO, YES, YES, "rawkey too small! (%zu)", ldone);
 692
 693                 if (ctr_mode == TFC_MODE_XTS) {
 694                         if (xtskeyset == NO) {
 695                                 pblk = xtskey;
 696                                 xtskeyset = YES;
 697                                 goto _xts2key;
 698                         }
 699                 }
 700         }
 701         else if (rawkey == TFC_RAWKEY_ASKSTR) {
 702                 tfc_yesno xtskeyset = NO;
 703
 704                 pblk = key; n = sizeof(key);
 705 _xts2keyaskstr: memset(&getps, 0, sizeof(struct getpasswd_state));
 706                 getps.fd = getps.efd = -1;
 707                 getps.passwd = (char *)pblk;
 708                 getps.pwlen = n;
 709                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
 710                 getps.charfilter = getps_filter;
 711                 getps.maskchar = 'x';
 712                 getps.flags = GETP_WAITFILL;
 713                 n = xgetpasswd(&getps);
 714                 if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
 715                 if (n == ((size_t)-2)) xexit(1);
 716                 if (ctr_mode == TFC_MODE_XTS) {
 717                         if (xtskeyset == NO) {
 718                                 pblk = xtskey; n = sizeof(xtskey);
 719                                 xtskeyset = YES;
 720                                 goto _xts2keyaskstr;
 721                         }
 722                 }
 723         }
 724         else if (rawkey == TFC_RAWKEY_ASKHEX) {
 725                 tfc_yesno xtskeyset = NO;
 726
 727                 pblk = key;
 728 _rawkey_hex_again:
 729                 memset(&getps, 0, sizeof(struct getpasswd_state));
 730                 getps.fd = getps.efd = -1;
 731                 getps.passwd = pwdask;
 732                 getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
 733                 getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
 734                 getps.charfilter = getps_hex_filter;
 735                 getps.maskchar = 'x';
 736                 getps.flags = GETP_WAITFILL;
 737                 n = xgetpasswd(&getps);
 738                 if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
 739                 if (n == ((size_t)-2)) xexit(1);
 740                 if (n % 2) {
 741                         tfc_esay("Please input even number of hex digits!");
 742                         goto _rawkey_hex_again;
 743                 }
 744                 hex2bin(pblk, pwdask);
 745                 memset(pwdask, 0, sizeof(pwdask));
 746                 if (ctr_mode == TFC_MODE_XTS) {
 747                         if (xtskeyset == NO) {
 748                                 pblk = xtskey;
 749                                 xtskeyset = YES;
 750                                 goto _rawkey_hex_again;
 751                         }
 752                 }
 753         }
 754         else if (password) {
 755 _pwdagain:      memset(&getps, 0, sizeof(struct getpasswd_state));
 756                 getps.fd = getps.efd = -1;
 757                 getps.passwd = pwdask;
 758                 getps.pwlen = sizeof(pwdask)-1;
 759                 getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
 760                 getps.charfilter = getps_filter;
 761                 getps.maskchar = 'x';
 762                 getps.flags = GETP_WAITFILL;
 763                 n = xgetpasswd(&getps);
 764                 if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
 765                 if (n == ((size_t)-2)) xexit(1);
 766                 if (do_edcrypt == TFC_DO_ENCRYPT && no_repeat == NO) {
 767                         getps.fd = getps.efd = -1;
 768                         getps.passwd = pwdagain;
 769                         getps.pwlen = sizeof(pwdagain)-1;
 770                         getps.echo = "Enter it again: ";
 771                         getps.flags = GETP_WAITFILL;
 772                         n = xgetpasswd(&getps);
 773                         if (n == NOSIZE) xerror(NO, NO, YES, "getting password again");
 774                         if (n == ((size_t)-2)) xexit(1);
 775                         if (strncmp(pwdask, pwdagain, sizeof(pwdagain)-1) != 0) {
 776                                 tfc_esay("Passwords are different, try again");
 777                                 goto _pwdagain;
 778                         }
 779                 }
 780                 skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
 781                 memset(pwdask, 0, sizeof(pwdask));
 782                 memset(pwdagain, 0, sizeof(pwdagain));
 783         }
 784         else {
 785                 if (skeinfd(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, kfd, maxkeylen) != YES)
 786                         xerror(NO, NO, YES, "hashing key");
 787         }
 788
 789         if (nr_turns > 1 && rawkey == NO) {
 790                 for (x = 0; x < nr_turns; x++)
 791                         skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 792         }
 793
 794         if (ctr_mode == TFC_MODE_XTS && rawkey == NO) {
 795                 skein(xtskey, TF_NR_KEY_BITS, mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 796         }
 797
 798         if (genkeyf) {
 799                 int krfd;
 800                 tfc_yesno xtskeyset = NO;
 801
 802                 pblk = key;
 803                 if (!strcmp(genkeyf, "-")) krfd = 1;
 804                 else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 805                 if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
 806 _xts2genkey:    if (write(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 807                 if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
 808                 if (verbose && xtskeyset == NO) {
 809                         tfc_esay("%s: password hashing done", progname);
 810                         tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
 811                         tfc_esay("%s: Have a nice day!", progname);
 812                 }
 813
 814                 if (ctr_mode == TFC_MODE_XTS) {
 815                         if (xtskeyset == NO) {
 816                                 pblk = xtskey;
 817                                 xtskeyset = YES;
 818                                 goto _xts2genkey;
 819                         }
 820                 }
 821
 822                 fchmod(krfd, 0600);
 823                 xclose(krfd);
 824                 xexit(0);
 825         }
 826
 827         if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
 828                 if (verbose) tfc_esay("%s: disabling signature verification on "
 829                         "requested partial decryption.", progname);
 830                 do_mac = NO;
 831         }
 832
 833         if (do_mac != NO) {
 834                 if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
 835                 if (ctr_mode < TFC_MODE_OCB) {
 836                         if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
 837                                 "will be slower.", progname);
 838                         if (mackey_opt) skein_init_key(&sk, mackey, macbits);
 839                         else skein_init(&sk, macbits);
 840                 }
 841         }
 842
 843         if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
 844                 skein(ctr, TF_TO_BITS(ctrsz), mackey_opt ? mackey : NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 845         }
 846
 847         tf_convkey(key);
 848         if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
 849         if (do_tfcrypt1 == YES) {
 850                 if (!tweakf) skein(key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_UNIT_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
 851                 tf_key_tweak_compat(key);
 852         }
 853         if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 854         if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
 855         tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 856         tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
 857
 858         switch (counter_opt) {
 859                 case TFC_CTR_SHOW:
 860                         switch (do_outfmt) {
 861                                 case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
 862                                 case TFC_OUTFMT_RAW: write(2, ctr, ctrsz); break;
 863                                 case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
 864                         }
 865                         break;
 866                 case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
 867         }
 868
 869 _ctrskip2:
 870         if (kfd != -1) {
 871                 xclose(kfd);
 872                 kfd = -1;
 873         }
 874         if (verbose) tfc_esay("%s: password hashing done", progname);
 875
 876         if (overwrite_source && srcfname) argv[idx] = srcfname;
 877
 878 _plain:
 879         if (argv[idx]) {
 880                 if (!strcmp(argv[idx], "-")) dfd = 1;
 881                 else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
 882                 if (dfd == -1) {
 883                         dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
 884                         if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 885                 }
 886                 dstfname = argv[idx];
 887                 idx++;
 888         }
 889
 890         if (oseek) {
 891                 if (lseek(dfd, oseek, SEEK_SET) == -1)
 892                         xerror(YES, NO, NO, "%s: seek failed", dstfname);
 893         }
 894
 895         for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
 896         memset(&sigact, 0, sizeof(sigact));
 897         sigact.sa_flags = SA_RESTART;
 898         sigact.sa_handler = print_crypt_status;
 899         sigaction(SIGUSR1, &sigact, NULL);
 900         sigaction(SIGTSTP, &sigact, NULL);
 901         sigaction(SIGALRM, &sigact, NULL);
 902         if (status_timer) setup_next_alarm(status_timer);
 903         sigact.sa_handler = change_status_width;
 904         sigaction(SIGQUIT, &sigact, NULL);
 905         sigact.sa_handler = change_status_timer;
 906         sigaction(SIGUSR2, &sigact, NULL);
 907         if (quiet == NO) {
 908                 sigact.sa_handler = print_crypt_status;
 909                 sigaction(SIGINT, &sigact, NULL);
 910                 sigaction(SIGTERM, &sigact, NULL);
 911         }
 912         else {
 913                 sigact.sa_handler = exit_sigterm;
 914                 sigaction(SIGINT, &sigact, NULL);
 915                 sigaction(SIGTERM, &sigact, NULL);
 916         }
 917         memset(&sigact, 0, sizeof(struct sigaction));
 918
 919         tfc_getcurtime(&delta_time);
 920
 921         errno = 0;
 922         if (counter_opt == TFC_CTR_RAND && ctr_mode != TFC_MODE_ECB) {
 923                 pblk = ctr;
 924                 lio = lrem = ctrsz;
 925                 ldone = 0;
 926 _ctrwagain:     lio = write(dfd, pblk, lrem);
 927                 if (lio != NOSIZE) ldone += lio;
 928                 else xerror(NO, NO, NO, "%s", dstfname);
 929                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
 930                 if (lio < lrem) {
 931                         pblk += lio;
 932                         lrem -= lio;
 933                         goto _ctrwagain;
 934                 }
 935                 total_processed_dst += ldone;
 936                 delta_processed += ldone;
 937         }
 938
 939         errno = 0;
 940         do_stop = NO;
 941         while (1) {
 942                 if (do_stop) break;
 943                 pblk = srcblk;
 944                 ldone = 0;
 945                 lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
 946 _ragain:        lio = read(sfd, pblk, lrem);
 947                 if (lio == 0) do_stop = TFC_STOP_BEGAN;
 948                 if (lio != NOSIZE) ldone += lio;
 949                 else {
 950                         if (errno != EIO && catch_all_errors != YES)
 951                                 xerror(NO, NO, NO, "%s", srcfname);
 952                         switch (error_action) {
 953                                 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _ragain; break;
 954                                 case TFC_ERRACT_SYNC:
 955                                         xerror(YES, NO, NO, "%s", srcfname);
 956                                         lio = ldone = lrem = lblock;
 957                                         memset(srcblk, 0, lio);
 958                                         lseek(sfd, lio, SEEK_CUR);
 959                                         break;
 960                                 default: xerror(NO, NO, NO, "%s", srcfname); break;
 961                         }
 962                 }
 963                 if (lio && lio < lrem) {
 964                         pblk += lio;
 965                         lrem -= lio;
 966                         goto _ragain;
 967                 }
 968                 total_processed_src += ldone;
 969
 970                 if (do_pad && (ldone % TF_BLOCK_SIZE)) {
 971                         size_t orig = ldone;
 972                         ldone += (TF_BLOCK_SIZE - (ldone % TF_BLOCK_SIZE));
 973                         if (ldone > blksize) ldone = blksize;
 974                         memset(srcblk+orig, 0, sizeof(srcblk)-orig);
 975                 }
 976
 977                 if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
 978                         skein_update(&sk, srcblk, ldone);
 979
 980                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
 981                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
 982                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_ENCRYPT)
 983                         tf_xts_encrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
 984                 else if (ctr_mode == TFC_MODE_XTS && do_edcrypt == TFC_DO_DECRYPT)
 985                         tf_xts_decrypt(key, xtskey, ctr, dstblk, srcblk, ldone, xtsblocks);
 986                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_ENCRYPT)
 987                         tf_ecb_encrypt(key, dstblk, srcblk, ldone);
 988                 else if (ctr_mode == TFC_MODE_ECB && do_edcrypt == TFC_DO_DECRYPT)
 989                         tf_ecb_decrypt(key, dstblk, srcblk, ldone);
 990                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_ENCRYPT)
 991                         tf_cbc_encrypt(key, ctr, dstblk, srcblk, ldone);
 992                 else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
 993                         tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
 994
 995                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
 996                         tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
 997                 else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
 998                         tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
 999
1000                 else if (ctr_mode == TFC_MODE_PLAIN)
1001                         memcpy(dstblk, srcblk, ldone);
1002
1003                 if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
1004                         skein_update(&sk, dstblk, ldone);
1005                 if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
1006
1007                 pblk = dstblk;
1008                 lrem = ldone;
1009                 ldone = 0;
1010 _wagain:        lio = write(dfd, pblk, lrem);
1011                 if (lio != NOSIZE) ldone += lio;
1012                 else xerror(NO, NO, NO, "%s", dstfname);
1013                 if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1014                 if (lio < lrem) {
1015                         pblk += lio;
1016                         lrem -= lio;
1017                         goto _wagain;
1018                 }
1019 _nowrite:       total_processed_dst += ldone;
1020                 delta_processed += ldone;
1021
1022                 if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
1023         }
1024
1025         if (do_stop == TFC_STOP_FULL) goto _nomac;
1026
1027         errno = 0;
1028         if (do_mac >= TFC_MAC_VRFY) {
1029                 if (!do_mac_file) {
1030                         pblk = macvrfy;
1031                         ldone = 0;
1032                         lrem = lblock = TF_FROM_BITS(macbits);
1033 _macragain:             lio = read(sfd, pblk, lrem);
1034                         if (lio != NOSIZE) ldone += lio;
1035                         else {
1036                                 if (errno != EIO && catch_all_errors != YES)
1037                                         xerror(NO, NO, NO, "%s", srcfname);
1038                                 switch (error_action) {
1039                                         case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", srcfname); goto _macragain; break;
1040                                         case TFC_ERRACT_SYNC:
1041                                                 xerror(YES, NO, NO, "%s", srcfname);
1042                                                 lio = ldone = lrem = lblock;
1043                                                 memset(macvrfy, 0, lio);
1044                                                 lseek(sfd, lio, SEEK_CUR);
1045                                                 break;
1046                                         default: xerror(NO, NO, NO, "%s", srcfname); break;
1047                                 }
1048                         }
1049                         if (lio && lio < lrem) {
1050                                 pblk += lio;
1051                                 lrem -= lio;
1052                                 goto _macragain;
1053                         }
1054                         total_processed_src += ldone;
1055                 }
1056                 else {
1057                         int mfd;
1058
1059                         if (!strcmp(do_mac_file, "-")) mfd = 0;
1060                         else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
1061                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1062                         lio = ldone = read(mfd, tmpdata, sizeof(tmpdata));
1063                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1064                         if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
1065                                 memmove(tmpdata, tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN,
1066                                         sizeof(tmpdata)-TFC_ASCII_TFC_MAC_FOURCC_LEN);
1067                                 lio = TF_FROM_BITS(macbits);
1068                                 base64_decode((char *)macvrfy, lio, (char *)tmpdata, sizeof(tmpdata));
1069                         }
1070                         else memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1071                         xclose(mfd);
1072                 }
1073
1074                 if (ldone < TF_FROM_BITS(macbits)) {
1075                         if (quiet == NO) tfc_esay("%s: short signature (%zu), "
1076                                 "not verifying", progname, ldone);
1077                         exitcode = 1;
1078                         goto _shortmac;
1079                 }
1080
1081                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1082                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1083
1084                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1085                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1086                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1087                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1088                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
1089                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
1090
1091                 if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
1092                         if (quiet == NO) {
1093                                 tfc_esay("%s: signature is good", progname);
1094                                 if (verbose) {
1095                                         if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
1096                                         else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
1097                                 }
1098                         }
1099                 }
1100                 else {
1101                         if (quiet == NO) tfc_esay("%s: signature is BAD: "
1102                                 "wrong password, key, mode, or file is not signed", progname);
1103                         exitcode = 1;
1104                 }
1105
1106 _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
1107                 memset(macresult, 0, sizeof(macresult));
1108                 memset(tmpdata, 0, sizeof(tmpdata));
1109         }
1110
1111         else if (do_mac == TFC_MAC_SIGN) {
1112                 if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
1113                 else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
1114
1115                 if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1116                 else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
1117                 else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
1118                 else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
1119                 else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
1120                 else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
1121                 memset(macresult, 0, sizeof(macresult));
1122
1123                 if (!do_mac_file) {
1124                         pblk = tmpdata;
1125                         lio = lrem = TF_FROM_BITS(macbits);
1126                         ldone = 0;
1127 _macwagain:             lio = write(dfd, pblk, lrem);
1128                         if (lio != NOSIZE) ldone += lio;
1129                         else xerror(NO, NO, NO, "%s", dstfname);
1130                         if (do_fsync && fsync(dfd) == -1) xerror(NO, NO, NO, "%s", dstfname);
1131                         if (lio < lrem) {
1132                                 pblk += lio;
1133                                 lrem -= lio;
1134                                 goto _macwagain;
1135                         }
1136                         total_processed_dst += ldone;
1137                         delta_processed += ldone;
1138                 }
1139                 else {
1140                         int mfd;
1141
1142                         if (!strcmp(do_mac_file, "-")) mfd = 1;
1143                         else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
1144                         if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
1145                         if (do_outfmt == TFC_OUTFMT_B64) {
1146                                 memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
1147                                 memset(tmpdata, 0, TFC_TMPSIZE);
1148                                 memcpy(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN);
1149                                 base64_encode((char *)tmpdata+TFC_ASCII_TFC_MAC_FOURCC_LEN, (char *)macvrfy, TF_FROM_BITS(macbits));
1150                                 lrem = strnlen((char *)tmpdata, sizeof(tmpdata));
1151                                 if (lrem) {
1152                                         tmpdata[lrem] = '\n';
1153                                         lrem++;
1154                                 }
1155                                 lio = write(mfd, tmpdata, lrem);
1156                         }
1157                         else lio = write(mfd, tmpdata, TF_FROM_BITS(macbits));
1158                         if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
1159                         if (do_fsync && fsync(mfd) == -1) xerror(NO, NO, YES, "%s", do_mac_file);
1160                         xclose(mfd);
1161                 }
1162
1163                 memset(macvrfy, 0, sizeof(macvrfy));
1164                 memset(macresult, 0, sizeof(macresult));
1165                 memset(tmpdata, 0, sizeof(tmpdata));
1166         }
1167
1168 _nomac:
1169         if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
1170
1171         if (do_preserve_time) fcopy_matime(dfd, &s_stat);
1172         xclose(sfd);
1173         xclose(dfd);
1174
1175         xexit(exitcode);
1176         return -1;
1177 }