X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfcrypt.c;h=d673d386e7757cf739ffc35fbf35283476b39e3b;hb=0303cbcec2b262cc3dcf8d89951967d7ba9543c7;hp=01c1479c879d839269c058aa4e4c0c4385f44df5;hpb=6a9ff11ac690fd5ffe09e0aa9398e00a54c2889c;p=tfcrypt.git

diff --git a/tfcrypt.c b/tfcrypt.c
index 01c1479..d673d38 100644
--- a/tfcrypt.c
+++ b/tfcrypt.c
@@ -2,7 +2,7 @@
  * 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:
  *
@@ -51,6 +51,62 @@ static int getps_hex_filter(struct getpasswd_state *getps, char chr, size_t pos)
 	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;
@@ -93,6 +149,29 @@ _baddfname:
 					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':
@@ -227,6 +306,8 @@ _baddfname:
 						do_full_hexdump = NO;
 					else if (!strcmp(s, "fullkey"))
 						do_full_key = YES;
+					else if (!strcmp(s, "showsecrets"))
+						show_secrets = YES;
 					else if (!strncmp(s, "iobs", 4) && *(s+4) == '=') {
 						s += 5;
 						blksize = (size_t)tfc_humanfsize(s, &stoi);
@@ -342,6 +423,17 @@ _baddfname:
 						if (counter_opt == TFC_CTR_HEAD)
 							maxlen += TF_BLOCK_SIZE;
 					}
+					else if (!strncmp(s, "ftrunc", 6) && *(s+6) == '=') {
+						s += 7;
+						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);
@@ -443,6 +535,7 @@ _baddfname:
 			case 'q':
 				quiet = YES;
 				verbose = NO;
+				do_full_hexdump = NO;
 				status_timer = 0;
 				break;
 			case 'v':
@@ -572,20 +665,14 @@ _mkragain:		lio = xread(mkfd, pblk, lrem);
 		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));
-		}
 	}
 
 	
@@ -767,12 +854,13 @@ _xts2keyaskstr:	memset(&getps, 0, sizeof(struct getpasswd_state));
 		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);
@@ -791,8 +879,8 @@ _rawkey_hex_again:
 		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");
@@ -803,6 +891,7 @@ _rawkey_hex_again:
 		}
 		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;
@@ -817,8 +906,8 @@ _pwdagain:	memset(&getps, 0, sizeof(struct getpasswd_state));
 		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");
@@ -837,6 +926,7 @@ _pwdagain:	memset(&getps, 0, sizeof(struct getpasswd_state));
 				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));
@@ -916,20 +1006,20 @@ _xts2genkey:	if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerro
 		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));
 
-	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;
-		case TFC_CTR_ZERO: memset(ctr, 0, 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) {
@@ -1243,6 +1333,7 @@ _nomac:
 
 	if (do_preserve_time) fcopy_matime(dfd, &s_stat);
 	xclose(sfd);
+	if (ftrunc_dfd != NOFSIZE) if (ftruncate(dfd, (off_t)ftrunc_dfd) == -1) xerror(YES, NO, YES, "ftruncate(%d)", dfd);
 	xclose(dfd);
 
 	xexit(exitcode);