* tfcrypt -- high security Threefish encryption tool.
*
* tfcrypt is copyrighted:
- * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
+ * Copyright (C) 2012-2019 Andrey Rys. All rights reserved.
*
* tfcrypt is licensed to you under the terms of std. MIT/X11 license:
*
#include "tfcrypt.h"
+static tfc_byte svctr[TF_BLOCK_SIZE];
+
+static void open_log(const char *logfile)
+{
+ int fd;
+
+ if (!strcmp(logfile, "-")) return;
+
+ fd = open(logfile, O_WRONLY | O_CREAT | O_LARGEFILE | O_TRUNC, 0666);
+ if (fd == -1) xerror(NO, NO, YES, "%s", logfile);
+ xclose(2);
+ if (dup2(fd, 2) == -1) xexit(2);
+ xclose(fd);
+ do_statline_dynamic = NO;
+}
+
static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
{
if (chr == '\x03') {
return 0;
}
+static inline int isctrlchr(int c)
+{
+ if (c == 9) return 0;
+ if (c >= 0 && c <= 31) return 1;
+ if (c == 127) return 1;
+ return 0;
+}
+
+static int getps_plain_filter(struct getpasswd_state *getps, char chr, size_t pos)
+{
+ int x;
+
+ x = getps_filter(getps, chr, pos);
+ if (x != 1) return x;
+
+ if (pos < getps->pwlen && !isctrlchr(chr))
+ write(getps->efd, &chr, sizeof(char));
+ return 1;
+}
+
+static int getps_plain_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
+{
+ int x;
+
+ x = getps_hex_filter(getps, chr, pos);
+ if (x != 1) return x;
+
+ if (pos < getps->pwlen && !isctrlchr(chr))
+ write(getps->efd, &chr, sizeof(char));
+ return 1;
+}
+
+static void make_hint(void *hint, size_t szhint, const void *data, size_t szdata)
+{
+ char t[TF_FROM_BITS(TF_MAX_BITS)];
+
+ skein(t, TF_MAX_BITS, NULL, data, szdata);
+ xor_shrink(hint, szhint, t, sizeof(t));
+ memset(t, 0, sizeof(t));
+}
+
+static void raw_say_hint(void *hint, size_t szhint, const void *data, size_t szdata, const char *prompt)
+{
+ make_hint(hint, szhint, data, szdata);
+ if (prompt) tfc_nfsay(stderr, "%s: ", prompt);
+ mehexdump(hint, szhint, szhint, 1);
+ memset(hint, 0, szhint);
+}
+
+static void say_hint(const void *data, size_t szdata, const char *prompt)
+{
+ char t[TF_SIZE_UNIT];
+ raw_say_hint(t, TF_SIZE_UNIT, data, szdata, prompt);
+ /* t[] is erased (automatically) */
+}
+
int main(int argc, char **argv)
{
int c;
double td;
char *s, *d, *t, *stoi;
size_t x, n;
+ tfc_fsize rwd;
+ progpid = getpid();
progname = basename(argv[0]);
if (!isatty(2)) do_statline_dynamic = NO;
_baddfname:
memset(s, 0, n);
+ if (!strcmp(progname, "iotool")) {
+ do_edcrypt = TFC_DO_PLAIN;
+ password = YES;
+ ctr_mode = TFC_MODE_PLAIN;
+ }
+
opterr = 0;
- while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:TPkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
+ while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:Pkzxc:l:qedn:vV:pwE:o:O:S:AmuM:R:Z:WHD:")) != -1) {
switch (c) {
case 'L':
read_defaults(optarg, NO);
counter_opt = TFC_CTR_HEAD;
else if (!strcasecmp(optarg, "rand"))
counter_opt = TFC_CTR_RAND;
+ else if (!strcasecmp(optarg, "zero"))
+ counter_opt = TFC_CTR_ZERO;
+ else if (strchr(optarg, ':')) {
+ char *ss, chr;
+
+ counter_opt = TFC_CTR_SSET;
+ n = sizeof(ctr);
+
+ s = d = optarg; t = NULL;
+ while ((s = strtok_r(d, ",", &t))) {
+ if (d) d = NULL;
+
+ if (n == 0) break;
+ ss = strchr(s, ':');
+ if (!ss) continue;
+ *ss = 0; ss++;
+ chr = (char)strtoul(s, &stoi, 16);
+ if (!str_empty(stoi)) continue;
+ x = (size_t)strtoul(ss, &stoi, 10);
+ if (!str_empty(stoi)) continue;
+ if (x > n) x = n;
+ memset(ctr+(sizeof(ctr)-n), (int)chr, x);
+ n -= x;
+ }
+ }
else counter_file = sksum_hashlist_file = optarg;
break;
case 'C':
ctr_mode = TFC_MODE_PLAIN;
break;
case 'e':
- do_edcrypt = TFC_DO_ENCRYPT;
+ if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_ENCRYPT;
break;
case 'd':
- do_edcrypt = TFC_DO_DECRYPT;
+ if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_DECRYPT;
break;
case 'D':
macbits = strtoul(optarg, &stoi, 10);
break;
case 't':
tweakf = optarg;
- break;
- case 'T':
- tfc_saltsz = 0;
- do_tfcrypt1 = YES;
+ do_full_key = NO;
break;
case 'l':
if (maxlen != NOFSIZE) break;
error_action = TFC_ERRACT_LSYNC;
else xerror(NO, YES, YES, "invalid error action %s specified", optarg);
break;
+ case 'o':
+ open_log(optarg);
+ break;
case 'O':
s = d = optarg; t = NULL;
while ((s = strtok_r(d, ",", &t))) {
mac_pw_prompt = s+10;
else if (!strcmp(s, "shorthex"))
do_full_hexdump = NO;
+ else if (!strcmp(s, "fullkey"))
+ do_full_key = YES;
+ else if (!strcmp(s, "showsecrets"))
+ show_secrets = YES;
+ else if (!strcmp(s, "finished"))
+ show_when_done = YES;
+ else if (!strcmp(s, "pid"))
+ show_pid = YES;
+ else if (!strncmp(s, "logfile", 7) && *(s+7) == '=')
+ open_log(s+8);
else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
s += 5;
blksize = (size_t)tfc_humanfsize(s, &stoi);
if (counter_opt == TFC_CTR_HEAD)
maxlen += TF_BLOCK_SIZE;
}
+ else if (!strncmp(s, "ftrunc", 6) && *(s+6) == '=') {
+ s += 7;
+ if (!strcmp(s, "tail")) {
+ do_ftrunc = TFC_FTRUNC_TAIL;
+ ftrunc_dfd = NOFSIZE;
+ }
+ else {
+ do_ftrunc = TFC_DO_FTRUNC;
+ ftrunc_dfd = tfc_humanfsize(s, &stoi);
+ if (!str_empty(stoi)) {
+ ftrunc_dfd = tfc_fnamesize(s, YES);
+ ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
+ if (ftrunc_dfd == NOFSIZE) xerror(NO, YES, YES,
+ "%s: invalid ftrunc value", s);
+ }
+ else ftrunc_dfd = tfc_modifysize(ftrunc_dfd, strchr(s, ':'));
+ }
+ }
else if (!strncmp(s, "xkey", 4) && *(s+4) == '=') {
s += 5;
maxkeylen = tfc_humanfsize(s, &stoi);
do_mac_file = optarg;
break;
case 'm':
+ case 'u':
if (do_mac != TFC_MAC_VRFY)
xerror(NO, YES, YES, "signature source was not specified");
do_mac = TFC_MAC_JUST_VRFY;
+ if (c == 'u') do_mac = TFC_MAC_JUST_VRFY2;
break;
case 'R':
case 'Z':
break;
case 'q':
quiet = YES;
+ xexit_no_nl = YES;
verbose = NO;
+ do_full_hexdump = NO;
status_timer = 0;
break;
case 'v':
xerror(NO, YES, YES, "Cannot encrypt and read CTR from source!");
if (overwrite_source && counter_opt == TFC_CTR_RAND)
xerror(NO, YES, YES, "Cannot embed a CTR into file when overwriting it!");
- if (tweakf && do_tfcrypt1 == NO)
- xerror(NO, YES, YES, "Use -T with -t tweakfile to enable old tfcrypt mode!");
if (ctr_mode == TFC_MODE_PLAIN
&& (do_edcrypt || do_mac || rawkey
|| mackey_opt || counter_opt || counter_file))
lrem = lblock = sizeof(tmpdata);
if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
_mkragain: lio = xread(mkfd, pblk, lrem);
- if (lio == 0) do_stop = YES;
+ if (lio == 0 && do_stop == NO) do_stop = YES;
if (lio != NOSIZE) ldone += lio;
else {
if (errno != EIO && catch_all_errors != YES)
getps.passwd = pwdask;
getps.pwlen = sizeof(pwdask)-1;
getps.echo = mac_pw_prompt ? mac_pw_prompt : "Enter MAC password: ";
- getps.charfilter = getps_filter;
- getps.maskchar = 'x';
+ getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
+ getps.maskchar = (show_secrets == YES) ? 0 : 'x';
getps.flags = GETP_WAITFILL;
n = xgetpasswd(&getps);
if (n == NOSIZE) xerror(NO, NO, YES, "getting MAC password");
if (n == ((size_t)-2)) xexit(1);
+ if (verbose) say_hint(pwdask, n, "MAC password hint");
skein(mackey, TF_MAX_BITS, NULL, pwdask, n);
- if (verbose) {
- skein(tmpdata, TF_MAX_BITS, NULL, mackey, TF_FROM_BITS(TF_MAX_BITS));
- xor_shrink(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, tmpdata, TF_FROM_BITS(TF_MAX_BITS));
- tfc_nfsay(stderr, "MAC password hint: ");
- mehexdump(tmpdata+TF_FROM_BITS(TF_MAX_BITS), TF_SIZE_UNIT, TF_SIZE_UNIT, 1);
- memset(tmpdata, 0, sizeof(tmpdata));
- }
}
else password = YES;
errno = 0;
- if (do_tfcrypt1 == YES && tweakf) {
+ if (do_full_key == NO && tweakf) {
int twfd;
if (!strcmp(tweakf, "-")) twfd = 0;
else twfd = open(tweakf, O_RDONLY | O_LARGEFILE);
if (twfd == -1) xerror(NO, NO, YES, "%s", tweakf);
- lio = ldone = xread(twfd, key+TF_FROM_BITS(TF_MAX_BITS)+TF_SIZE_UNIT, 2*TF_SIZE_UNIT);
+ lio = ldone = xread(twfd, tweak, TF_TWEAK_SIZE);
if (lio == NOSIZE) xerror(NO, NO, YES, "%s", tweakf);
- if (ldone < 2*TF_SIZE_UNIT)
- xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, 2*TF_SIZE_UNIT);
+ if (ldone < TF_TWEAK_SIZE)
+ xerror(NO, NO, YES, "%s: %zu bytes tweak required", tweakf, TF_TWEAK_SIZE);
xclose(twfd);
}
if (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO && maxlen != NOFSIZE) {
if (verbose) tfc_esay("%s: disabling signature verification on "
- "requested partial decryption.", progname);
+ "requested partial decryption.", tfc_format_pid(progname));
do_mac = NO;
}
if (ctr_mode == TFC_MODE_PLAIN) goto _plain;
- if (verbose) tfc_esay("%s: hashing password", progname);
+ if (verbose) tfc_esay("%s: hashing password", tfc_format_pid(progname));
if (rawkey == TFC_RAWKEY_KEYFILE) {
tfc_yesno xtskeyset = NO;
getps.passwd = (char *)pblk;
getps.pwlen = n;
getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (str): ";
- getps.charfilter = getps_filter;
- getps.maskchar = 'x';
+ getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
+ getps.maskchar = (show_secrets == YES) ? 0 : 'x';
getps.flags = GETP_WAITFILL;
n = xgetpasswd(&getps);
if (n == NOSIZE) xerror(NO, NO, YES, "getting string rawkey");
if (n == ((size_t)-2)) xexit(1);
+ if (verbose) say_hint(pblk, n, "Raw string key hint");
if (ctr_mode == TFC_MODE_XTS) {
if (xtskeyset == NO) {
pblk = xtskey; n = sizeof(xtskey);
getps.passwd = pwdask;
getps.pwlen = (TF_FROM_BITS(TFC_KEY_BITS)*2);
getps.echo = pw_prompt ? pw_prompt : "Enter rawkey (hex): ";
- getps.charfilter = getps_hex_filter;
- getps.maskchar = 'x';
+ getps.charfilter = (show_secrets == YES) ? getps_plain_hex_filter : getps_hex_filter;
+ getps.maskchar = (show_secrets == YES) ? 0 : 'x';
getps.flags = GETP_WAITFILL;
n = xgetpasswd(&getps);
if (n == NOSIZE) xerror(NO, NO, YES, "getting hex rawkey");
}
hex2bin(pblk, pwdask);
memset(pwdask, 0, sizeof(pwdask));
+ if (verbose) say_hint(pblk, n/2, "Raw hex key hint");
if (ctr_mode == TFC_MODE_XTS) {
if (xtskeyset == NO) {
pblk = xtskey;
getps.passwd = pwdask;
getps.pwlen = sizeof(pwdask)-1;
getps.echo = pw_prompt ? pw_prompt : "Enter password: ";
- getps.charfilter = getps_filter;
- getps.maskchar = 'x';
+ getps.charfilter = (show_secrets == YES) ? getps_plain_filter : getps_filter;
+ getps.maskchar = (show_secrets == YES) ? 0 : 'x';
getps.flags = GETP_WAITFILL;
n = xgetpasswd(&getps);
if (n == NOSIZE) xerror(NO, NO, YES, "getting password");
goto _pwdagain;
}
}
+ if (verbose) say_hint(pwdask, n, "Password hint");
skein(key, TFC_KEY_BITS, mackey_opt ? mackey : NULL, pwdask, n);
memset(pwdask, 0, sizeof(pwdask));
memset(pwdagain, 0, sizeof(pwdagain));
_xts2genkey: if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
if (verbose && xtskeyset == NO) {
- tfc_esay("%s: password hashing done", progname);
- tfc_esay("%s: rawkey written to %s.", progname, genkeyf);
- tfc_esay("%s: Have a nice day!", progname);
+ tfc_esay("%s: password hashing done", tfc_format_pid(progname));
+ tfc_esay("%s: rawkey written to %s.", tfc_format_pid(progname), genkeyf);
+ tfc_esay("%s: Have a nice day!", tfc_format_pid(progname));
}
if (ctr_mode == TFC_MODE_XTS) {
if (iseek_blocks && (do_edcrypt == TFC_DO_DECRYPT && do_mac != NO)) {
if (verbose) tfc_esay("%s: disabling signature verification on "
- "requested partial decryption.", progname);
+ "requested partial decryption.", tfc_format_pid(progname));
do_mac = NO;
}
if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
if (ctr_mode < TFC_MODE_OCB) {
if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
- "will be slower.", progname);
+ "will be slower.", tfc_format_pid(progname));
if (mackey_opt) skein_init_key(&sk, mackey, macbits);
else skein_init(&sk, macbits);
}
tf_convkey(key);
if (ctr_mode == TFC_MODE_XTS) tf_convkey(xtskey);
- if (do_tfcrypt1 == YES) {
- 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));
- tf_key_tweak_compat(key);
+ if (do_full_key == NO) {
+ if (!tweakf) skein(tweak, TF_NR_TWEAK_BITS, NULL, key, TF_FROM_BITS(TFC_KEY_BITS));
+ tf_tweak_set(key, tweak);
}
if (ctr_mode == TFC_MODE_ECB) goto _ctrskip2;
+
+ if (counter_opt == TFC_CTR_ZERO) memset(ctr, 0, ctrsz);
+
tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
+ if (do_mac == TFC_MAC_JUST_VRFY2) memcpy(svctr, ctr, TF_BLOCK_SIZE);
- switch (counter_opt) {
- case TFC_CTR_SHOW:
- switch (do_outfmt) {
- case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
- case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
- case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
- }
- break;
- case TFC_CTR_RAND: tfc_getrandom(ctr, ctrsz); break;
+ if (counter_opt == TFC_CTR_SHOW) {
+ switch (do_outfmt) {
+ case TFC_OUTFMT_B64: tfc_printbase64(stderr, ctr, ctrsz, YES); break;
+ case TFC_OUTFMT_RAW: xwrite(2, ctr, ctrsz); break;
+ case TFC_OUTFMT_HEX: mehexdump(ctr, ctrsz, ctrsz, YES); break;
+ }
}
+ else if (counter_opt == TFC_CTR_RAND) tfc_getrandom(ctr, ctrsz);
_ctrskip2:
if (kfd != -1) {
xclose(kfd);
kfd = -1;
}
- if (verbose) tfc_esay("%s: password hashing done", progname);
+ if (verbose) tfc_esay("%s: password hashing done", tfc_format_pid(progname));
if (overwrite_source && srcfname) argv[idx] = srcfname;
sigact.sa_flags = SA_RESTART;
sigact.sa_handler = print_crypt_status;
sigaction(SIGUSR1, &sigact, NULL);
- sigaction(SIGTSTP, &sigact, NULL);
sigaction(SIGALRM, &sigact, NULL);
- if (status_timer) setup_next_alarm(status_timer);
+ if (status_timer) setup_next_alarm(status_timer > 1000000 ? 1000000 : status_timer);
sigact.sa_handler = change_status_width;
sigaction(SIGQUIT, &sigact, NULL);
sigact.sa_handler = change_status_timer;
sigact.sa_handler = print_crypt_status;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
+ sigaction(SIGTSTP, &sigact, NULL);
}
else {
sigact.sa_handler = exit_sigterm;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
+ sigact.sa_handler = handle_sigtstp;
+ sigaction(SIGTSTP, &sigact, NULL);
}
memset(&sigact, 0, sizeof(struct sigaction));
if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
+ if (do_mac == TFC_MAC_JUST_VRFY2) {
+ rwd = tfc_fdgetpos(sfd);
+ if (rwd == NOFSIZE) {
+ tfc_esay("%s: WARNING: input is not seekable, disabling MAC testing mode", tfc_format_pid(progname));
+ do_mac = TFC_MAC_VRFY;
+ }
+ goto _nodecrypt_again_vrfy2;
+
+_decrypt_again_vrfy2:
+ if (lseek(sfd, (off_t)rwd, SEEK_SET) == ((off_t)-1)) {
+ xerror(ignore_seek_errors, NO, YES, "MAC testing seek failed");
+ }
+ total_processed_src = rwd;
+ memcpy(ctr, svctr, TF_BLOCK_SIZE);
+ memset(svctr, 0, TF_BLOCK_SIZE);
+ }
+
+_nodecrypt_again_vrfy2:
errno = 0;
do_stop = NO;
while (1) {
lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
_ragain: lio = xread(sfd, pblk, lrem);
- if (lio == 0) do_stop = TFC_STOP_BEGAN;
+ if (lio == 0) do_stop = YES;
if (lio != NOSIZE) ldone += lio;
else {
if (errno != EIO && catch_all_errors != YES)
if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
skein_update(&sk, dstblk, ldone);
- if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
+ if (do_mac >= TFC_MAC_JUST_VRFY) goto _nowrite;
pblk = dstblk;
lrem = ldone;
lrem -= lio;
goto _wagain;
}
+ total_written_dst += ldone;
_nowrite: total_processed_dst += ldone;
delta_processed += ldone;
- if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
+ if (maxlen != NOFSIZE && total_processed_src >= maxlen) {
+ do_stop = YES;
+ break;
+ }
}
- if (do_stop == TFC_STOP_FULL) goto _nomac;
-
errno = 0;
if (do_mac >= TFC_MAC_VRFY) {
if (!do_mac_file) {
if (ldone < TF_FROM_BITS(macbits)) {
if (quiet == NO) tfc_esay("%s: short signature (%zu), "
- "not verifying", progname, ldone);
+ "not verifying", tfc_format_pid(progname), ldone);
exitcode = 1;
goto _shortmac;
}
if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
if (quiet == NO) {
- tfc_esay("%s: signature is good", progname);
+ tfc_esay("%s: signature is good", tfc_format_pid(progname));
if (verbose) {
if (do_outfmt == TFC_OUTFMT_B64) tfc_printbase64(stderr, macresult, TF_FROM_BITS(macbits), YES);
else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
}
}
+ if (do_mac == TFC_MAC_JUST_VRFY2) {
+ if (verbose) tfc_esay("%s: -u: MAC signature is valid, proceeding with decrypting it again", tfc_format_pid(progname));
+ do_mac = TFC_MAC_DROP;
+ goto _decrypt_again_vrfy2;
+ }
}
else {
- if (quiet == NO) tfc_esay("%s: signature is BAD: "
- "wrong password, key, mode, or file is not signed", progname);
+ if (quiet == NO) {
+ tfc_esay("%s: signature is BAD: "
+ "wrong password, key, mode, or file is not signed", tfc_format_pid(progname));
+ if (do_mac == TFC_MAC_JUST_VRFY2) tfc_esay("%s: -u: MAC signature is invalid, not decrypting it again", tfc_format_pid(progname));
+ }
exitcode = 1;
}
memset(tmpdata, 0, sizeof(tmpdata));
}
-_nomac:
- if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
-
- if (do_preserve_time) fcopy_matime(dfd, &s_stat);
- xclose(sfd);
- xclose(dfd);
+ if (verbose || status_timer || (do_stop == YES && quiet == NO)) print_crypt_status(0);
xexit(exitcode);
return -1;
projects / tfcrypt.git / blobdiff