/**
* Encodes a Checksum object. <xmp> Checksum ::= SEQUENCE { cksumtype [0] Int32, checksum [1]
* OCTET STRING } </xmp>
*
* <p>This definition reflects the Network Working Group RFC 4120 specification available at <a
* href="http://www.ietf.org/rfc/rfc4120.txt">http://www.ietf.org/rfc/rfc4120.txt</a>.
*
* @return byte array of enocded Checksum.
* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
*/
public byte[] asn1Encode() throws Asn1Exception, IOException {
DerOutputStream bytes = new DerOutputStream();
DerOutputStream temp = new DerOutputStream();
temp.putInteger(BigInteger.valueOf(cksumType));
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), temp);
temp = new DerOutputStream();
temp.putOctetString(checksum);
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), temp);
temp = new DerOutputStream();
temp.write(DerValue.tag_Sequence, bytes);
return temp.toByteArray();
}