de.gematik.ti.healthcard.control.common

Class Utilities

java.lang.Object

de.gematik.ti.healthcard.control.common.Utilities

public final class Utilities
extends java.lang.Object

some utilities for usage

Method Summary

Modifier and Type	Method and Description
static org.spongycastle.math.ec.ECPoint	byteArrayToECPoint(byte[] byteArray, org.spongycastle.math.ec.ECCurve curve) Decodes an ECPoint from byte array.
static byte[]	getKeyObjectEncoded(byte[] asn1Input) Encodes an ASN1 KeyObject

Methods inherited from class java.lang.Object

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

Method Detail

byteArrayToECPoint

public static org.spongycastle.math.ec.ECPoint byteArrayToECPoint(byte[] byteArray,
                                                                  org.spongycastle.math.ec.ECCurve curve)

Decodes an ECPoint from byte array. Prime field p is taken from the passed curve The first byte must contain the value 0x04 (uncompressed point).

Parameters:

byteArray - Byte array of the form {0x04 || x-bytes [] || y byte []}

curve - The curve on which the point should lie.

Returns:

EC point generated from input data

getKeyObjectEncoded

public static byte[] getKeyObjectEncoded(byte[] asn1Input)
                                  throws java.io.IOException

Encodes an ASN1 KeyObject

Parameters:

asn1Input - ASN1 Stream of the form [Application]Sequence{}

Returns:

The encoded ByteArray

Throws:

java.io.IOException - if an error occurred