org.ldaptive.asn1

Class OidType

java.lang.Object

org.ldaptive.asn1.AbstractDERType

org.ldaptive.asn1.OidType

All Implemented Interfaces:

DEREncoder

public class OidType
extends AbstractDERType
implements DEREncoder

Converts object identifiers 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
OidType(DERTag tag, int[] item) Creates a new oid type.
OidType(DERTag tag, String item) Creates a new oid type.
OidType(int[] item) Creates a new oid type.
OidType(String item) Creates a new oid type.

Method Summary

Modifier and Type	Method and Description
static String	decode(ByteBuffer encoded) Converts bytes in the buffer to an OID 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.
protected static void	isValid(int[] oid) Checks whether the supplied oid is valid.
static int[]	parse(String oid) Converts the supplied oid into an array on integers.
protected static int	readInt(ByteBuffer buffer) Reads the necessary encoded bytes from the supplied buffer to create an integer.
protected static byte[]	toBytes(int component) Converts the supplied oid component to a byte array.
static byte[]	toBytes(int[] oid) Converts the supplied list of oid components 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

OidType

public OidType(String item)

Creates a new oid type.

Parameters:

item - to DER encode

OidType

public OidType(int[] item)

Creates a new oid type.

Parameters:

item - to DER encode

OidType

public OidType(DERTag tag,
               String item)

Creates a new oid type.

Parameters:

tag - der tag associated with this type

item - to DER encode

Throws:

IllegalArgumentException - if the der tag is constructed

OidType

public OidType(DERTag tag,
               int[] item)

Creates a new oid 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 String decode(ByteBuffer encoded)

Converts bytes in the buffer to an OID 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 OID bytes and the limit is set beyond the last byte of OID data.

Returns:

decoded bytes as an OID.

toBytes

public static byte[] toBytes(int[] oid)

Converts the supplied list of oid components to a byte array.

Parameters:

oid - to convert

Returns:

byte array

Throws:

IllegalArgumentException - if the oid is not valid. See isValid(int[])

isValid

protected static void isValid(int[] oid)

Checks whether the supplied oid is valid. Oids must meet the following criteria:

• must not be null and must have at least 2 elements
• components must not be negative
• first component must be 0, 1, or 2
• if first component 0 or 1, second component must be <= 38

Parameters:

oid - to check

Throws:

IllegalArgumentException - if the oid is not valid.

toBytes

protected static byte[] toBytes(int component)

Converts the supplied oid component to a byte array. The length of the byte array is the minimal size needed to contain the oid component.

Parameters:

component - to convert to bytes

Returns:

oid bytes

readInt

protected static int readInt(ByteBuffer buffer)

Reads the necessary encoded bytes from the supplied buffer to create an integer.

Parameters:

buffer - to read

Returns:

OID component integer

parse

public static int[] parse(String oid)

Converts the supplied oid into an array on integers.

Parameters:

oid - to parse

Returns:

array of oid components

Throws:

IllegalArgumentException - if the oid is not valid. See isValid(int[])