1 files changed, 24 insertions, 0 deletions
diff --git a/Crypto/src/crypto/IDerivationFunction.cs b/Crypto/src/crypto/IDerivationFunction.cs
new file mode 100644
index 000000000..7f289f790
--- /dev/null
+++ b/Crypto/src/crypto/IDerivationFunction.cs
@@ -0,0 +1,24 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto
+{
+    /**
+     * base interface for general purpose byte derivation functions.
+     */
+    public interface IDerivationFunction
+    {
+        void Init(IDerivationParameters parameters);
+
+        /**
+         * return the message digest used as the basis for the function
+         */
+        IDigest Digest
+        {
+            get;
+        }
+
+        int GenerateBytes(byte[] output, int outOff, int length);
+        //throws DataLengthException, ArgumentException;
+    }
+
+}