X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfc_conf.c;h=15a79ed77059f3f13046626de0589e7aeba14f2f;hb=13cc886eb2edfe7be4e65067be6df01e2f08436a;hp=bd2b112ecc045b8ff7b9615aae42c13d17e68bdc;hpb=8b7f1839b1981554979af1aa2e5e8b58ad63fe77;p=tfcrypt.git

diff --git a/tfc_conf.c b/tfc_conf.c
index bd2b112..15a79ed 100644
--- a/tfc_conf.c
+++ b/tfc_conf.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:
  *
@@ -66,7 +66,7 @@ _spc2:		t = strchr(d, ' ');
 		*t = 0; d = t+1; goto _spc2;
 _nspc:
 		if (!strcmp(s, "nr_turns")) {
-			nr_turns = sksum_turns = strtoul(d, &stoi, 10);
+			nr_turns = strtoul(d, &stoi, 10);
 			if (!str_empty(stoi)) xerror(NO, YES, YES, "[%s] nr_turns=%s: invalid number of turns", path, d);
 		}
 		else if (!strcmp(s, "ctr_mode")) {
@@ -94,9 +94,45 @@ _nspc:
 			|| macbits > TF_MAX_BITS || macbits % 8)
 				xerror(NO, YES, YES, "[%s] macbits=%s: invalid MAC bits setting", path, d);
 		}
+		else if (!strcmp(s, "do_full_key")) {
+			if (!strcasecmp(d, "yes")) do_full_key = YES;
+			else if (!strcasecmp(d, "no")) do_full_key = NO;
+		}
 		else xerror(NO, YES, YES, "[%s] %s: unknown keyword", path, s);
 	}
 
 	memset(ln, 0, sizeof(ln));
 	fclose(f);
 }
+
+void hash_defaults(char *uhash, size_t szuhash)
+{
+	struct skein sk;
+	char shash[56];
+	const char *mode;
+	tfc_byte hash[TF_FROM_BITS(256)];
+
+	skein_init(&sk, 256);
+
+	skein_update(&sk, tfc_salt, tfc_saltsz);
+
+	memset(shash, 0, sizeof(shash));
+	sprintf(shash, "%zu", nr_turns);
+	skein_update(&sk, shash, strlen(shash));
+
+	mode = tfc_modename(ctr_mode);
+	skein_update(&sk, mode, strlen(mode));
+
+	memset(shash, 0, sizeof(shash));
+	sprintf(shash, "%zu", macbits);
+	skein_update(&sk, shash, strlen(shash));
+
+	skein_update(&sk, do_full_key ? "1" : "0", 1);
+
+	skein_final(hash, &sk);
+	memset(shash, 0, sizeof(shash));
+	base64_encode(shash, (const char *)hash, sizeof(hash));
+	memset(hash, 0, sizeof(hash));
+
+	xstrlcpy(uhash, shash, szuhash);
+}