2 * tfcrypt -- high security Threefish encryption tool.
4 * tfcrypt is copyrighted:
5 * Copyright (C) 2012-2019 Andrey Rys. All rights reserved.
7 * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
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:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
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.
32 static void exit_sigterm_skein(int signal)
37 void skein(void *hash, size_t bits, const void *key, const void *data, size_t szdata)
41 if (key) skein_init_key(&sk, key, bits);
42 else skein_init(&sk, bits);
43 skein_update(&sk, data, szdata);
44 skein_final(hash, &sk);
47 tfc_yesno skeinfd(void *hash, size_t bits, const void *key, int fd, tfc_fsize offset, tfc_fsize readto)
49 static tfc_byte skblk[TFC_BLKSIZE];
53 size_t ldone, lblock, lrem, lio;
56 if (ctr_mode == TFC_MODE_SKSUM) total_processed_src = total_processed_dst = delta_processed = 0;
58 if (fd == -1) goto _fail;
60 if (readto == NOFSIZE) {
61 readto = tfc_fdsize(fd);
62 if (readto == NOFSIZE) goto _fail;
64 if (offset != 0 && offset != NOFSIZE) {
65 if (lseek(fd, (off_t)offset, SEEK_SET) == -1) {
66 if (ignore_seek_errors == NO) goto _fail;
71 if (key) skein_init_key(&sk, key, bits);
72 else skein_init(&sk, bits);
79 lblock = lrem = blk_len_adj(readto, total, TFC_BLKSIZE);
81 if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(fd);
82 _again: lio = xread(fd, pblk, lrem);
83 if (lio == 0) do_stop = YES;
84 if (lio != NOSIZE) ldone += lio;
86 if (errno != EIO && catch_all_errors != YES) goto _fail;
87 switch (error_action) {
88 case TFC_ERRACT_CONT: xerror(YES, NO, NO, "skeinfd: %d", fd); goto _again; break;
90 case TFC_ERRACT_LSYNC:
91 xerror(YES, NO, NO, "skeinfd: %d", fd);
92 lio = lrem = ldone = lblock;
94 memset(skblk, 0, lio);
95 if (rdpos == NOFSIZE) lseek(fd, lio, SEEK_CUR);
96 else lseek(fd, rdpos + lio, SEEK_SET);
98 default: goto _fail; break;
101 if (lio && lio < lrem) {
107 if (ctr_mode == TFC_MODE_SKSUM) {
108 total_processed_src = total_processed_dst = total;
109 delta_processed += ldone;
111 skein_update(&sk, skblk, ldone);
112 if (readto != NOFSIZE && total >= readto) break;
115 if (fd > 2) lseek(fd, (off_t)readto, SEEK_SET);
117 skein_final(hash, &sk);
118 if (ctr_mode == TFC_MODE_SKSUM) {
119 if (verbose || status_timer) {
120 print_crypt_status(TFC_SIGSTAT);
123 total_processed_src = total_processed_dst = delta_processed = 0;
125 memset(skblk, 0, TFC_BLKSIZE);
129 memset(&sk, 0, sizeof(struct skein));
130 memset(hash, 0, SKEIN_DIGEST_SIZE);
131 memset(skblk, 0, TFC_BLKSIZE);
135 void do_sksum(char *spec, char **fargv)
137 static char sksblk[TFC_BLKSIZE / 2], tmp[TFC_TMPSIZE];
138 tfc_byte hash[SKEIN_DIGEST_SIZE];
143 if (macbits < TF_MAX_BITS) {
148 if (!strcmp(spec, "sksum")) {
153 if ((sscanf(spec, "sk%zusum", &bits) < 1)) {
157 if (bits < 8 || bits > TF_MAX_BITS) {
159 "%u: invalid bits number specified!\n"
160 "tfcrypt supports from 8 to %u bits, divisible by 8.",
161 bits, TFC_U(TF_MAX_BITS));
164 if (!bits || bits % 8) {
166 "%u: invalid bits number specified!\n"
167 "Number of bits must start from 8 and be divisible by 8.",
168 bits, TFC_U(TF_MAX_BITS));
172 do_edcrypt = TFC_DO_PLAIN;
173 ctr_mode = TFC_MODE_SKSUM;
175 for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
176 memset(&sigact, 0, sizeof(sigact));
177 sigact.sa_flags = SA_RESTART;
178 sigact.sa_handler = print_crypt_status;
179 sigaction(SIGUSR1, &sigact, NULL);
180 sigaction(SIGALRM, &sigact, NULL);
181 sigact.sa_handler = change_status_width;
182 sigaction(SIGQUIT, &sigact, NULL);
183 sigact.sa_handler = change_status_timer;
184 sigaction(SIGUSR2, &sigact, NULL);
185 sigact.sa_handler = exit_sigterm_skein;
186 sigaction(SIGINT, &sigact, NULL);
187 sigaction(SIGTERM, &sigact, NULL);
188 sigact.sa_handler = handle_sigtstp;
189 sigaction(SIGTSTP, &sigact, NULL);
190 memset(&sigact, 0, sizeof(struct sigaction));
192 tfc_getcurtime(&delta_time);
194 if (sksum_hashlist_file) {
196 char *s, *d, *t, *shash, *fname;
197 int failed = 0, totaltested = 0;
199 if (!strcmp(sksum_hashlist_file, "-")) f = stdin;
200 else f = fopen(sksum_hashlist_file, "r");
201 if (!f) xerror(NO, NO, YES, "%s", sksum_hashlist_file);
204 memset(sksblk, 0, sizeof(sksblk));
205 if (xfgets(sksblk, sizeof(sksblk), f) != YES) break;
207 s = d = sksblk; t = NULL;
208 shash = fname = NULL;
209 while ((s = strtok_r(d, "\t", &t))) {
212 if (!shash) shash = s;
213 else if (shash && !fname) fname = s;
216 if (!shash || !fname) {
217 xerror(YES, NO, YES, "invalid string %s", sksblk);
222 s = strchr(shash, ' ');
223 if (s && s[1] == ' ') *s = 0;
225 fd = xxopen(YES, fname, O_RDONLY | O_LARGEFILE);
227 xerror(YES, NO, YES, "%s", fname);
232 if (status_timer) setup_next_alarm(status_timer > 1000000 ? 1000000 : status_timer);
233 if (skeinfd(hash, bits, mackey_opt ? mackey : NULL, fd, iseek, maxlen) != YES) {
234 xerror(YES, NO, YES, "%s", fname);
239 if (sksum_turns > 1) {
241 for (y = 0; y < sksum_turns; y++)
242 skein(hash, bits, mackey_opt ? mackey : NULL, hash, TF_FROM_BITS(bits));
244 if (isbase64(shash)) base64_decode(tmp, sizeof(tmp), shash, strlen(shash));
245 else hex2bin(tmp, shash);
247 if (!memcmp(hash, tmp, TF_FROM_BITS(bits))) {
248 tfc_say("%s: OK", fname);
251 tfc_say("%s: FAILED", fname);
254 memset(tmp, 0, sizeof(tmp));
255 memset(sksblk, 0, sizeof(sksblk));
261 tfc_esay("%s: WARNING: %u of %u computed checksums did NOT match",
262 tfc_format_pid(progname), failed, totaltested);
268 for (xx = 0; fargv[xx]; xx++);
275 for (x = 0; fargv[x] && xx; x++) {
276 if (!strcmp(fargv[x], "-")) fd = 0;
277 else fd = xxopen(YES, fargv[x], O_RDONLY | O_LARGEFILE);
279 xerror(YES, NO, YES, "%s", fargv[x]);
284 _dohash: if (status_timer) setup_next_alarm(status_timer > 1000000 ? 1000000 : status_timer);
285 if (skeinfd(hash, bits, mackey_opt ? mackey : NULL, fd, iseek, maxlen) != YES) {
286 xerror(YES, NO, YES, "%s", fargv[x]);
291 if (sksum_turns > 1) {
293 for (y = 0; y < sksum_turns; y++) skein(hash, bits, mackey_opt ? mackey : NULL, hash, TF_FROM_BITS(bits));
295 if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stdout, hash, TF_FROM_BITS(bits), 0);
296 else if (do_outfmt == TFC_OUTFMT_RAW) xwrite(1, hash, TF_FROM_BITS(bits));
297 else mhexdump(hash, TF_FROM_BITS(bits), TF_FROM_BITS(bits), 0);
298 if (do_outfmt != TFC_OUTFMT_RAW) {
299 if (quiet == NO || xx > 1) tfc_say("\t%s", fargv[x] ? fargv[x] : "-");
304 memset(hash, 0, SKEIN_DIGEST_SIZE);