Package com.nimbusds.oauth2.sdk.jose

Class SecretKeyDerivation

java.lang.Object

com.nimbusds.oauth2.sdk.jose.SecretKeyDerivation

public class SecretKeyDerivation
extends Object

Derives an AES secret key from a client secret. Intended for performing symmetric encryption and decryption with a client secret, as specified in OpenID Connect Core 1.0, section 10.2.

Method Summary

Modifier and Type	Method	Description
static SecretKey	deriveSecretKey(Secret clientSecret, int bits)	Derives a secret encryption key from the specified client secret.
static SecretKey	deriveSecretKey(Secret clientSecret, com.nimbusds.jose.JWEAlgorithm alg, com.nimbusds.jose.EncryptionMethod enc)	Derives a secret encryption key from the specified client secret.

Methods inherited from class java.lang.Object

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

Method Details

deriveSecretKey

public static SecretKey deriveSecretKey(Secret clientSecret,
 com.nimbusds.jose.JWEAlgorithm alg,
 com.nimbusds.jose.EncryptionMethod enc)
                                 throws com.nimbusds.jose.JOSEException

Derives a secret encryption key from the specified client secret.

Parameters:

clientSecret - The client secret. Must not be null.

alg - The JWE algorithm. Must not be null.

enc - The JWE method. Must not be null.

Returns:

The matching secret key (with algorithm set to "AES").

Throws:

com.nimbusds.jose.JOSEException - If the JWE algorithm or method is not supported.

deriveSecretKey

public static SecretKey deriveSecretKey(Secret clientSecret,
 int bits)
                                 throws com.nimbusds.jose.JOSEException

Derives a secret encryption key from the specified client secret.

Parameters:

clientSecret - The client secret. Must not be null.

bits - The secret key bits (128, 192, 256, 384 or 512).

Returns:

The matching secret key (with algorithm set to "AES").

Throws:

com.nimbusds.jose.JOSEException - If the secret key bit size it not supported.