diff --git a/Crypto/src/util/Arrays.cs b/Crypto/src/util/Arrays.cs
new file mode 100644
index 000000000..7fa05ebee
--- /dev/null
+++ b/Crypto/src/util/Arrays.cs
@@ -0,0 +1,226 @@
+using System;
+using System.Text;
+
+namespace Org.BouncyCastle.Utilities
+{
+
+ /// <summary> General array utilities.</summary>
+ public sealed class Arrays
+ {
+ private Arrays()
+ {
+ }
+
+ public static bool AreEqual(
+ bool[] a,
+ bool[] b)
+ {
+ if (a == b)
+ return true;
+
+ if (a == null || b == null)
+ return false;
+
+ return HaveSameContents(a, b);
+ }
+
+ public static bool AreEqual(
+ char[] a,
+ char[] b)
+ {
+ if (a == b)
+ return true;
+
+ if (a == null || b == null)
+ return false;
+
+ return HaveSameContents(a, b);
+ }
+
+ /// <summary>
+ /// Are two arrays equal.
+ /// </summary>
+ /// <param name="a">Left side.</param>
+ /// <param name="b">Right side.</param>
+ /// <returns>True if equal.</returns>
+ public static bool AreEqual(
+ byte[] a,
+ byte[] b)
+ {
+ if (a == b)
+ return true;
+
+ if (a == null || b == null)
+ return false;
+
+ return HaveSameContents(a, b);
+ }
+
+ [Obsolete("Use 'AreEqual' method instead")]
+ public static bool AreSame(
+ byte[] a,
+ byte[] b)
+ {
+ return AreEqual(a, b);
+ }
+
+ /// <summary>
+ /// A constant time equals comparison - does not terminate early if
+ /// test will fail.
+ /// </summary>
+ /// <param name="a">first array</param>
+ /// <param name="b">second array</param>
+ /// <returns>true if arrays equal, false otherwise.</returns>
+ public static bool ConstantTimeAreEqual(
+ byte[] a,
+ byte[] b)
+ {
+ int i = a.Length;
+ if (i != b.Length)
+ return false;
+ int cmp = 0;
+ while (i != 0)
+ {
+ --i;
+ cmp |= (a[i] ^ b[i]);
+ }
+ return cmp == 0;
+ }
+
+ public static bool AreEqual(
+ int[] a,
+ int[] b)
+ {
+ if (a == b)
+ return true;
+
+ if (a == null || b == null)
+ return false;
+
+ return HaveSameContents(a, b);
+ }
+
+ private static bool HaveSameContents(
+ bool[] a,
+ bool[] b)
+ {
+ int i = a.Length;
+ if (i != b.Length)
+ return false;
+ while (i != 0)
+ {
+ --i;
+ if (a[i] != b[i])
+ return false;
+ }
+ return true;
+ }
+
+ private static bool HaveSameContents(
+ char[] a,
+ char[] b)
+ {
+ int i = a.Length;
+ if (i != b.Length)
+ return false;
+ while (i != 0)
+ {
+ --i;
+ if (a[i] != b[i])
+ return false;
+ }
+ return true;
+ }
+
+ private static bool HaveSameContents(
+ byte[] a,
+ byte[] b)
+ {
+ int i = a.Length;
+ if (i != b.Length)
+ return false;
+ while (i != 0)
+ {
+ --i;
+ if (a[i] != b[i])
+ return false;
+ }
+ return true;
+ }
+
+ private static bool HaveSameContents(
+ int[] a,
+ int[] b)
+ {
+ int i = a.Length;
+ if (i != b.Length)
+ return false;
+ while (i != 0)
+ {
+ --i;
+ if (a[i] != b[i])
+ return false;
+ }
+ return true;
+ }
+
+ public static string ToString(
+ object[] a)
+ {
+ StringBuilder sb = new StringBuilder('[');
+ if (a.Length > 0)
+ {
+ sb.Append(a[0]);
+ for (int index = 1; index < a.Length; ++index)
+ {
+ sb.Append(", ").Append(a[index]);
+ }
+ }
+ sb.Append(']');
+ return sb.ToString();
+ }
+
+ public static int GetHashCode(
+ byte[] data)
+ {
+ if (data == null)
+ {
+ return 0;
+ }
+
+ int i = data.Length;
+ int hc = i + 1;
+
+ while (--i >= 0)
+ {
+ hc *= 257;
+ hc ^= data[i];
+ }
+
+ return hc;
+ }
+
+ public static byte[] Clone(
+ byte[] data)
+ {
+ return data == null ? null : (byte[]) data.Clone();
+ }
+
+ public static int[] Clone(
+ int[] data)
+ {
+ return data == null ? null : (int[]) data.Clone();
+ }
+
+ public static void Fill(
+ byte[] buf,
+ byte b)
+ {
+ int i = buf.Length;
+ while (i > 0)
+ {
+ buf[--i] = b;
+ }
+ }
+ }
+}
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