1 files changed, 17 insertions, 0 deletions
diff --git a/java/security/Signature.java b/java/security/Signature.java
index 845a77a8b..68ae99d42 100644
--- a/java/security/Signature.java
+++ b/java/security/Signature.java
@@ -40,6 +40,7 @@ package java.security;
 
 import gnu.java.security.Engine;
 
+import java.nio.ByteBuffer;
 import java.security.cert.Certificate;
 import java.security.cert.X509Certificate;
 import java.security.spec.AlgorithmParameterSpec;
@@ -467,6 +468,22 @@ public abstract class Signature extends SignatureSpi
     else
       throw new SignatureException();
   }
+  
+  /**
+   * Update this signature with the {@link java.nio.Buffer#remaining()}
+   * bytes of the input buffer.
+   * 
+   * @param input The input buffer.
+   * @throws SignatureException If this instance was not properly
+   *  initialized.
+   */
+  public final void update(ByteBuffer input) throws SignatureException
+  {
+    if (state != UNINITIALIZED)
+      engineUpdate(input);
+    else
+      throw new SignatureException("not initialized");
+  }
 
   /**
    * Returns the name of the algorithm currently used. The names of algorithms