Initial commitstart

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/isc/iterated_hash.c b/lib/isc/iterated_hash.c
new file mode 100644
index 0000000..8c32929
--- /dev/null
+++ b/lib/isc/iterated_hash.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2006, 2008  Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: iterated_hash.c,v 1.4 2008/09/24 03:16:58 tbox Exp $ */
+
+#include <stdio.h>
+
+#include <isc/sha1.h>
+#include <isc/iterated_hash.h>
+
+int
+isc_iterated_hash(unsigned char out[ISC_SHA1_DIGESTLENGTH],
+		  unsigned int hashalg, int iterations,
+		  const unsigned char *salt, int saltlength,
+		  const unsigned char *in, int inlength)
+{
+	isc_sha1_t ctx;
+	int n = 0;
+
+	if (hashalg != 1)
+		return (0);
+
+	do {
+		isc_sha1_init(&ctx);
+		isc_sha1_update(&ctx, in, inlength);
+		isc_sha1_update(&ctx, salt, saltlength);
+		isc_sha1_final(&ctx, out);
+		in = out;
+		inlength = ISC_SHA1_DIGESTLENGTH;
+	} while (n++ < iterations);
+
+	return (ISC_SHA1_DIGESTLENGTH);
+}