org.apache.xml.security.stax.impl.algorithms
Class ECDSAUtils

java.lang.Object
  org.apache.xml.security.stax.impl.algorithms.ECDSAUtils

public final class ECDSAUtils
extends Object

Version:

$Revision: 1181995 $ $Date: 2011-10-11 19:03:00 +0100 (Tue, 11 Oct 2011) $

Author:

$Author: coheigea $

Nested Class Summary

static class

ECDSAUtils.ECCurveDefinition

Method Summary

static byte[]	convertASN1toXMLDSIG(byte[] asn1Bytes) Converts an ASN.1 ECDSA value to a XML Signature ECDSA Value.
static byte[]	convertXMLDSIGtoASN1(byte[] xmldsigBytes) Converts a XML Signature ECDSA Value to an ASN.1 DSA value.
static ECPoint	decodePoint(byte[] encodedBytes, EllipticCurve elliptiCcurve)
static byte[]	encodePoint(ECPoint ecPoint, EllipticCurve ellipticCurve)
static ECDSAUtils.ECCurveDefinition	getECCurveDefinition(String oid)
static String	getOIDFromPublicKey(ECPublicKey ecPublicKey)
static byte[]	stripLeadingZeros(byte[] bytes)

Methods inherited from class java.lang.Object

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

Method Detail

convertASN1toXMLDSIG

public static byte[] convertASN1toXMLDSIG(byte[] asn1Bytes)
                                   throws IOException

Converts an ASN.1 ECDSA value to a XML Signature ECDSA Value.

The JAVA JCE ECDSA Signature algorithm creates ASN.1 encoded (r,s) value pairs; the XML Signature requires the core BigInteger values.

Parameters:

asn1Bytes -

Returns:

the decode bytes

Throws:

IOException

See Also:

6.4.1 DSA, 3.3. ECDSA Signatures

convertXMLDSIGtoASN1

public static byte[] convertXMLDSIGtoASN1(byte[] xmldsigBytes)
                                   throws IOException

Converts a XML Signature ECDSA Value to an ASN.1 DSA value.

The JAVA JCE ECDSA Signature algorithm creates ASN.1 encoded (r,s) value pairs; the XML Signature requires the core BigInteger values.

Parameters:

xmldsigBytes -

Returns:

the encoded ASN.1 bytes

Throws:

IOException

See Also:

6.4.1 DSA, 3.3. ECDSA Signatures

getOIDFromPublicKey

public static String getOIDFromPublicKey(ECPublicKey ecPublicKey)

getECCurveDefinition

public static ECDSAUtils.ECCurveDefinition getECCurveDefinition(String oid)

encodePoint

public static byte[] encodePoint(ECPoint ecPoint,
                                 EllipticCurve ellipticCurve)

decodePoint

public static ECPoint decodePoint(byte[] encodedBytes,
                                  EllipticCurve elliptiCcurve)

stripLeadingZeros

public static byte[] stripLeadingZeros(byte[] bytes)