de.flexiprovider.common.util
Class ASN1Tools

java.lang.Object
  |
  +--de.flexiprovider.common.util.ASN1Tools

public final class ASN1Tools

extends java.lang.Object

ASN.1 utility class. Used to translate between FlexiBigInt and BigInteger types. Provides DER encoding and decoding methods.

Author:

Martin Döring

Method Summary

static codec.asn1.ASN1Integer	createInteger(FlexiBigInt value) Create a new ASN1Integer from the given FlexiBigInt value.
static void	derDecode(byte[] encoding, codec.asn1.ASN1Type type) Decode the given DER encoded ASN.1 structure.
static byte[]	derEncode(codec.asn1.ASN1Type type) DER encode the given ASN.1 structure.
static FlexiBigInt	getFlexiBigInt(codec.asn1.ASN1Integer value) Get the FlexiBigInt value from the given ASN1Integer.

Methods inherited from class java.lang.Object

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

Method Detail

createInteger

public static codec.asn1.ASN1Integer createInteger(FlexiBigInt value)

Create a new ASN1Integer from the given FlexiBigInt value.

Parameters:

value - the FlexiBigInt value

Returns:

a new ASN1Integer holding the FlexiBigInt value

getFlexiBigInt

public static FlexiBigInt getFlexiBigInt(codec.asn1.ASN1Integer value)

Get the FlexiBigInt value from the given ASN1Integer.

Parameters:

value - the ASN1Integer

Returns:

the FlexiBigInt value stored in the ASN1Integer

derEncode

public static byte[] derEncode(codec.asn1.ASN1Type type)

DER encode the given ASN.1 structure.

Parameters:

type - the ASN.1 structure

Returns:

the DER encoded ASN.1 structure

derDecode

public static void derDecode(byte[] encoding,
                             codec.asn1.ASN1Type type)
                      throws codec.asn1.ASN1Exception,
                             java.io.IOException

Decode the given DER encoded ASN.1 structure.

Parameters:

encoding - the encoded ASN.1 structure

type - the type holding the decoding

Throws:

java.io.IOException - on decoding errors.

codec.asn1.ASN1Exception - on decoding errors.