com.sun.squawk.security.signing
Class KeyUtil

java.lang.Object
  com.sun.squawk.security.signing.KeyUtil

public class KeyUtil
extends Object

The KeyUtil class provides functions to encode and decode ECPublicKeys in the X9.62 encoding.

Author:

Christian Pühringer

Constructor Summary

KeyUtil()

Method Summary

static byte[]	encodePublicECKeyInX962(ECPublicKey publicKey) Encodes a public key using X9.62
static ECPublicKey	getPublicECKeyFromX962Encoding(byte[] publicKeyBA) Gets the ECPublicKey from the X962 encoding in a byte array
static ECPublicKey	getPublicECKeyFromX962Encoding(byte[] publicKeyBA, int offset, int length) Gets the ECPublicKey from the X9.62 encoding in a byte array
static ECPublicKey	getPublicECKeyFromX962Encoding(String publicKeyS) gets the ECPublicKey from the X962 encoding in a String

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyUtil

public KeyUtil()

Method Detail

encodePublicECKeyInX962

public static byte[] encodePublicECKeyInX962(ECPublicKey publicKey)
                                      throws CryptoException

Encodes a public key using X9.62

Parameters:

publicKey -

Returns:

the public key encoded using X9.62

Throws:

CryptoException

getPublicECKeyFromX962Encoding

public static ECPublicKey getPublicECKeyFromX962Encoding(byte[] publicKeyBA,
                                                         int offset,
                                                         int length)
                                                  throws CryptoException

Gets the ECPublicKey from the X9.62 encoding in a byte array

Parameters:

publicKeyBA - byte array containing the EC public key in X9.62 encoding.

offset - Offset in the byte array where the key starts.

length - Length of the encoded key.

Returns:

ECPublicKey the Elliptic curve public key, or null if publicKeyS is not a valid key

Throws:

CryptoException

getPublicECKeyFromX962Encoding

public static ECPublicKey getPublicECKeyFromX962Encoding(byte[] publicKeyBA)
                                                  throws CryptoException

Gets the ECPublicKey from the X962 encoding in a byte array

Parameters:

publicKeyBA - byte array containing EC public key in X962 encoding.

Returns:

ECPublicKey the Elliptic curve public key, or null if publicKeyS is not a valid key

Throws:

CryptoException

getPublicECKeyFromX962Encoding

public static ECPublicKey getPublicECKeyFromX962Encoding(String publicKeyS)
                                                  throws CryptoException

gets the ECPublicKey from the X962 encoding in a String

Parameters:

publicKeyS - EC public key in X962 encoding. Must be a SEC160r key.

Returns:

ECPublicKey the Elliptic curve public key, or null if publicKeyS is not a valid key

Throws:

CryptoException