FULL PRODUCT VERSION :
JDK1.8.0.131 (latest current version)

A DESCRIPTION OF THE PROBLEM :

Tried to run the following code to implement EC cryptography:

XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC");
kpg.initialize(256);
KeyPair kp = kpg.generateKeyPair();
KeyInfoFactory kif = fac.getKeyInfoFactory();
KeyValue kv = kif.newKeyValue(kp.getPublic()); // Get error here

But I get the error in the last line of code. I found the problem in DOMKeyValue.java where it tries to get the method ECParameters.encodePoint. But the latest release of ECParameters doesn't have this method. Here is the error when I copied the code from EC.getMethod() in DOMKeyValue.java:
Source breakpoint: KeyTest.java:26
Exception breakpoint: Class.java:1786, java.lang.NoSuchMethodException, sun.security.ec.ECParameters.encodePoint(java.security.spec.ECPoint, java.security.spec.EllipticCurve)

I also checked the code in grepcode.com on both the DOMKeyValue and ECParameters class and it seems like the encodePoint disappeared from ECParameters after version 7u40-b43 whereas DOMKeyValue was not updated. So can someone please fix this? I would like to get my code for EC (secp256r1) to digitally sign my files working. Thanks.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the source code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exceptions
ACTUAL -
Get an exception

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.security.KeyException: ECKeyValue not supported
	at org.jcp.xml.dsig.internal.dom.DOMKeyValue$EC.<init>(DOMKeyValue.java:350)
	at org.jcp.xml.dsig.internal.dom.DOMKeyInfoFactory.newKeyValue(DOMKeyInfoFactory.java:71)
	at test.KeyTest.main(KeyTest.java:27)
Caused by: java.lang.ClassNotFoundException: sun/security/ec/ECParameters
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at org.jcp.xml.dsig.internal.dom.DOMKeyValue$EC.getMethods(DOMKeyValue.java:367)
	at org.jcp.xml.dsig.internal.dom.DOMKeyValue$EC$1.run(DOMKeyValue.java:343)
	at org.jcp.xml.dsig.internal.dom.DOMKeyValue$EC$1.run(DOMKeyValue.java:339)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.jcp.xml.dsig.internal.dom.DOMKeyValue$EC.<init>(DOMKeyValue.java:338)
	... 2 more


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package test;

import java.security.KeyPairGenerator;
import java.util.Collections;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.keyinfo.*;
import java.security.*;

public class KeyTest {
    


	public static void main(String[] args) throws Exception{
		XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
		KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC");
		kpg.initialize(256);
		KeyPair kp = kpg.generateKeyPair();
		KeyInfoFactory kif = fac.getKeyInfoFactory();
		KeyValue kv = kif.newKeyValue(kp.getPublic());
		//KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));

	}

}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
I don't think there is a workaround since I am not even directly calling DOMKeyValue.