Package com.nimbusds.common.id

Class IdentifierWithHMAC

java.lang.Object

com.nimbusds.common.id.BaseIdentifier

com.nimbusds.common.id.IdentifierWithHMAC

All Implemented Interfaces:

Identifier, Comparable<Identifier>, net.minidev.json.JSONAware

public class IdentifierWithHMAC
extends BaseIdentifier

Identifier with Hash-based (SHA-256) Message Authentication Code (HMAC).

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_BYTE_LENGTH	The default byte length of generated identifiers.

Fields inherited from class com.nimbusds.common.id.BaseIdentifier

SECURE_RANDOM

Constructor Summary

Constructors

Constructor	Description
IdentifierWithHMAC(byte[] value, SecretKey hmacKey)	Creates a new identifier protected with a SHA-256 based HMAC.
IdentifierWithHMAC(SecretKey hmacKey)	Generates a new 128-bite secure random identifier and protects it with a SHA-256 based HMAC.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object object)	Overrides Object.equals().
static IdentifierWithHMAC	parseAndValidate(String value, SecretKey hmacKey)	Parses and validates the specified identifier with HMAC protection.

Methods inherited from class com.nimbusds.common.id.BaseIdentifier

compareTo, hashCode, toJSONString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_BYTE_LENGTH

public static final int DEFAULT_BYTE_LENGTH

The default byte length of generated identifiers.

See Also:

Constant Field Values

Constructor Detail

IdentifierWithHMAC

public IdentifierWithHMAC(byte[] value,
                          SecretKey hmacKey)

Creates a new identifier protected with a SHA-256 based HMAC.

Parameters:

value - The identifier value. Must not empty or null.

hmacKey - The HMAC key. Must be at least 128 bits long.

IdentifierWithHMAC

public IdentifierWithHMAC(SecretKey hmacKey)

Generates a new 128-bite secure random identifier and protects it with a SHA-256 based HMAC.

Parameters:

hmacKey - The HMAC key. Must be at least 128 bits long.

Throws:

RuntimeException - If HMAC computation failed.

Method Detail

equals

public boolean equals(Object object)

Description copied from class: BaseIdentifier

Overrides Object.equals().

Specified by:

equals in class BaseIdentifier

Parameters:

object - The object to compare to.

Returns:

true if the objects have the same value, otherwise false.

parseAndValidate

public static IdentifierWithHMAC parseAndValidate(String value,
                                                  SecretKey hmacKey)
                                           throws InvalidIdentifierException

Parses and validates the specified identifier with HMAC protection.

Parameters:

value - The identifier value to parse and validate. Must not be null.

hmacKey - The HMAC key. Must be at least 128 bits long.

Returns:

The validated identifier.

Throws:

InvalidIdentifierException - If the identifier format is illegal or the HMAC is invalid.

RuntimeException - If HMAC computation failed.