com.nimbusds.jose.crypto
Class RSASSASigner

java.lang.Object
  com.nimbusds.jose.crypto.RSASSASigner

All Implemented Interfaces:

JWSAlgorithmProvider, JWSSigner

@ThreadSafe
public class RSASSASigner
extends Object
implements JWSSigner

RSA Signature-Scheme-with-Appendix (RSASSA) signer of JWS objects. This class is thread-safe.

Supports the following JSON Web Algorithms (JWAs):

• JWSAlgorithm.RS256
• JWSAlgorithm.RS384
• JWSAlgorithm.RS512

Version:

$version$ (2013-05-04)

Author:

Vladimir Dzhuvinov

Field Summary

static Set<JWSAlgorithm>

SUPPORTED_ALGORITHMS The supported JWS algorithms.

Constructor Summary

RSASSASigner(RSAPrivateKey privateKey)
Creates a new RSA Signature-Scheme-with-Appendix (RSASSA) signer.

Method Summary

RSAPrivateKey	getPrivateKey() Gets the private RSA key.
protected static Signature	getRSASignerAndVerifier(JWSAlgorithm alg) Gets an RSA signer and verifier for the specified RSASSA-based JSON Web Algorithm (JWA).
Base64URL	sign(ReadOnlyJWSHeader header, byte[] signingInput) Signs the specified input of a JWS object.
Set<JWSAlgorithm>	supportedAlgorithms() Returns the names of the supported JWS algorithms.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.nimbusds.jose.JWSAlgorithmProvider

supportedAlgorithms

Field Detail

SUPPORTED_ALGORITHMS

public static final Set<JWSAlgorithm> SUPPORTED_ALGORITHMS

The supported JWS algorithms.

Constructor Detail

RSASSASigner

public RSASSASigner(RSAPrivateKey privateKey)

Creates a new RSA Signature-Scheme-with-Appendix (RSASSA) signer.

Parameters:

privateKey - The private RSA key. Must not be null.

Method Detail

getPrivateKey

public RSAPrivateKey getPrivateKey()

Gets the private RSA key.

Returns:

The private RSA key.

sign

public Base64URL sign(ReadOnlyJWSHeader header,
                      byte[] signingInput)
               throws JOSEException

Description copied from interface: JWSSigner

Signs the specified input of a JWS object.

Specified by:

sign in interface JWSSigner

Parameters:

header - The JSON Web Signature (JWS) header. Must specify a supported JWS algorithm and must not be null.

signingInput - The input to sign. Must not be null.

Returns:

The resulting signature part (third part) of the JWS object.

Throws:

JOSEException - If the JWS algorithm is not supported or if signing failed for some other reason.

getRSASignerAndVerifier

protected static Signature getRSASignerAndVerifier(JWSAlgorithm alg)
                                            throws JOSEException

Gets an RSA signer and verifier for the specified RSASSA-based JSON Web Algorithm (JWA).

Parameters:

alg - The JSON Web Algorithm (JWA). Must be supported and not null.

Returns:

An RSA signer and verifier instance.

Throws:

JOSEException - If the algorithm is not supported.

supportedAlgorithms

public Set<JWSAlgorithm> supportedAlgorithms()

Description copied from interface: JWSAlgorithmProvider

Returns the names of the supported JWS algorithms. These correspond to the alg JWS header parameter.

Specified by:

supportedAlgorithms in interface JWSAlgorithmProvider

Returns:

The supported JWS algorithms, empty set if none.