1 files changed, 12 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/DerivationFunction.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/DerivationFunction.java
new file mode 100644
index 000000000..b8e913fd2
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/DerivationFunction.java
@@ -0,0 +1,12 @@
+package org.spongycastle.crypto;
+
+/**
+ * base interface for general purpose byte derivation functions.
+ */
+public interface DerivationFunction
+{
+    public void init(DerivationParameters param);
+
+    public int generateBytes(byte[] out, int outOff, int len)
+        throws DataLengthException, IllegalArgumentException;
+}