1 files changed, 3 insertions, 1 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/crypto/engines/Grainv1Engine.java b/bcprov/src/main/java/org/bouncycastle/crypto/engines/Grainv1Engine.java
index 782a93c..77f52d1 100644
--- a/bcprov/src/main/java/org/bouncycastle/crypto/engines/Grainv1Engine.java
+++ b/bcprov/src/main/java/org/bouncycastle/crypto/engines/Grainv1Engine.java
@@ -220,7 +220,7 @@ public class Grainv1Engine
         }
     }
 
-    public void processBytes(byte[] in, int inOff, int len, byte[] out,
+    public int processBytes(byte[] in, int inOff, int len, byte[] out,
                              int outOff)
         throws DataLengthException
     {
@@ -244,6 +244,8 @@ public class Grainv1Engine
         {
             out[outOff + i] = (byte)(in[inOff + i] ^ getKeyStream());
         }
+
+        return len;
     }
 
     public void reset()