com.nimbusds.jose.crypto.impl

Class AAD

java.lang.Object

com.nimbusds.jose.crypto.impl.AAD

public class AAD
extends Object

Additional authenticated data (AAD).

See RFC 7518 (JWA), section 5.1, point 14.

Version:

2017-06-01

Author:

Vladimir Dzhuvinov

Constructor Summary

Constructors

Constructor and Description
AAD()

Method Summary

Modifier and Type	Method and Description
static byte[]	compute(Base64URL encodedJWEHeader) Computes the Additional Authenticated Data (AAD) for the specified BASE64URL-encoded JWE header.
static byte[]	compute(JWEHeader jweHeader) Computes the Additional Authenticated Data (AAD) for the specified JWE header.
static byte[]	computeLength(byte[] aad) Computes the bit length of the specified Additional Authenticated Data (AAD).

Methods inherited from class java.lang.Object

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

Constructor Detail

AAD

public AAD()

Method Detail

compute

public static byte[] compute(JWEHeader jweHeader)

Computes the Additional Authenticated Data (AAD) for the specified JWE header.

Parameters:

jweHeader - The JWE header. Must not be null.

Returns:

The AAD.

compute

public static byte[] compute(Base64URL encodedJWEHeader)

Computes the Additional Authenticated Data (AAD) for the specified BASE64URL-encoded JWE header.

Parameters:

encodedJWEHeader - The BASE64URL-encoded JWE header. Must not be null.

Returns:

The AAD.

computeLength

public static byte[] computeLength(byte[] aad)
                            throws IntegerOverflowException

Computes the bit length of the specified Additional Authenticated Data (AAD). Used in AES/CBC/PKCS5Padding/HMAC-SHA2 encryption.

Parameters:

aad - The Additional Authenticated Data (AAD). Must not be null.

Returns:

The computed AAD bit length, as a 64 bit big-endian representation (8 byte array).

Throws:

IntegerOverflowException - On a integer overflow.