From 0be50bf118909a89833eae6e5aa4126bec4b8099 Mon Sep 17 00:00:00 2001
From: Love Hornquist Astrand <lha@h5l.org>
Date: Sat, 6 Nov 2010 20:36:08 +0100
Subject: [PATCH] add krb5_data_ct_cmp

---
 lib/krb5/data.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/lib/krb5/data.c b/lib/krb5/data.c
index c4c202be5..f62a5532a 100644
--- a/lib/krb5/data.c
+++ b/lib/krb5/data.c
@@ -207,3 +207,22 @@ krb5_data_cmp(const krb5_data *data1, const krb5_data *data2)
 	return data1->length - data2->length;
     return memcmp(data1->data, data2->data, data1->length);
 }
+
+/**
+ * Compare to data not exposing timing information from the checksum data
+ *
+ * @param data1 krb5_data to compare
+ * @param data2 krb5_data to compare
+ *
+ * @return returns zero for same data, otherwise non zero.
+ *
+ * @ingroup krb5
+ */
+
+KRB5_LIB_FUNCTION int KRB5_LIB_CALL
+krb5_data_ct_cmp(const krb5_data *data1, const krb5_data *data2)
+{
+    if (data1->length != data2->length)
+	return data1->length - data2->length;
+    return ct_memcmp(data1->data, data2->data, data1->length);
+}