org.ldaptive.asn1

Class IntegerType

java.lang.Object

org.ldaptive.asn1.AbstractDERType

org.ldaptive.asn1.IntegerType

All Implemented Interfaces:

DEREncoder

public class IntegerType
extends AbstractDERType
implements DEREncoder

Converts arbitrary-precision integers to and from their DER encoded format.

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	derItem Integer to encode.

Constructor Summary

Constructors

Constructor and Description
IntegerType(BigInteger item) Creates a new integer type.
IntegerType(DERTag tag, BigInteger item) Creates a new integer type.
IntegerType(DERTag tag, int item) Creates a new integer type.
IntegerType(int item) Creates a new integer type.

Method Summary

Modifier and Type	Method and Description
static BigInteger	decode(ByteBuffer encoded) Converts bytes in the buffer to an integer by reading from the current position to the limit, which assumes the bytes of the integer are in big-endian order.
static BigInteger	decodeUnsigned(ByteBuffer encoded) Converts bytes in the buffer to an unsigned integer by reading from the current position to the limit, which assumes the bytes of the integer are in big-endian order.
byte[]	encode() Encode this object into it's DER type.
static byte[]	toBytes(BigInteger i) Converts the supplied big integer to a byte array.

Methods inherited from class org.ldaptive.asn1.AbstractDERType

encode, readBuffer

Methods inherited from class java.lang.Object

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

Field Detail

derItem

private final byte[] derItem

Integer to encode.

Constructor Detail

IntegerType

public IntegerType(BigInteger item)

Creates a new integer type.

Parameters:

item - to DER encode

IntegerType

public IntegerType(int item)

Creates a new integer type.

Parameters:

item - to DER encode

IntegerType

public IntegerType(DERTag tag,
                   BigInteger item)

Creates a new integer type.

Parameters:

tag - der tag associated with this type

item - to DER encode

Throws:

IllegalArgumentException - if the der tag is constructed

IntegerType

public IntegerType(DERTag tag,
                   int item)

Creates a new integer type.

Parameters:

tag - der tag associated with this type

item - to DER encode

Throws:

IllegalArgumentException - if the der tag is constructed

Method Detail

encode

public byte[] encode()

Description copied from interface: DEREncoder

Encode this object into it's DER type.

Specified by:

encode in interface DEREncoder

Returns:

DER encoded object

decode

public static BigInteger decode(ByteBuffer encoded)

Converts bytes in the buffer to an integer by reading from the current position to the limit, which assumes the bytes of the integer are in big-endian order.

Parameters:

encoded - buffer containing DER-encoded data where the buffer is positioned at the start of integer bytes and the limit is set beyond the last byte of integer data.

Returns:

decoded bytes as an integer of arbitrary size.

decodeUnsigned

public static BigInteger decodeUnsigned(ByteBuffer encoded)

Converts bytes in the buffer to an unsigned integer by reading from the current position to the limit, which assumes the bytes of the integer are in big-endian order.

Parameters:

encoded - buffer containing DER-encoded data where the buffer is positioned at the start of integer bytes and the limit is set beyond the last byte of integer data.

Returns:

decoded bytes as an unsigned integer of arbitrary size.

toBytes

public static byte[] toBytes(BigInteger i)

Converts the supplied big integer to a byte array.

Parameters:

i - to convert

Returns:

byte array