Package net.shibboleth.oidc.security

Class JWSAssemblyUtils

java.lang.Object

net.shibboleth.oidc.security.JWSAssemblyUtils

public final class JWSAssemblyUtils
extends Object

Generic utility class for helping with JWS assembly.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	JWSAssemblyUtils()	Private constructor.

Method Summary

Modifier and Type	Method	Description
static SignedJWT	assembleMacJws(JWSAlgorithm algorithm, JWTClaimsSet claimsSet, byte[] secret)	Assemble a HMAC based JSON Web Signature token (JWS) using the given algorithm, claims, and secret.
static String	assembleMacJwsAsString(JWSAlgorithm algorithm, JWTClaimsSet claimsSet, byte[] secret)	Assemble a HMAC based JSON Web Signature token using the given algorithm, claims, and secret, and return its JSON compact serialized form.
private static String	composeSigningInput(JWSHeader header, Payload payload)	Compose the message that is to be signed.
private static String	getJCAAlgorithmName(JWSAlgorithm alg)	Gets the matching Java Cryptography Architecture (JCA) algorithm name for the specified HMAC-based JSON Web Algorithm (JWA).
static byte[]	getSecretBytes(String secret)	Convert the given secret into its byte representation assuming a UTF-8 character set.

Methods inherited from class java.lang.Object

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

Constructor Details

JWSAssemblyUtils

private JWSAssemblyUtils()

Private constructor.

Method Details

assembleMacJwsAsString

@Nonnull
public static String assembleMacJwsAsString(@Nonnull
 JWSAlgorithm algorithm,
 @Nonnull
 JWTClaimsSet claimsSet,
 @Nonnull
 byte[] secret)
                                     throws EncodingException,
JOSEException,
ParseException

Assemble a HMAC based JSON Web Signature token using the given algorithm, claims, and secret, and return its JSON compact serialized form.

Note, does not check key to algorithm compatibility, use Nimbus's MACSigner directly for the additional safety checks it has. This can therefore be used over the Nimbus signer on occasions where an algorithm to secret key incompatibility exists e.g. using a HS512 HMAC with too small a secret key.

Parameters:

algorithm - the JWA algorithm, **must** be one from the HMAC family.

claimsSet - the JSON claims that form the payload.

secret - the pre-shared secret used to construct the HMAC.

Returns:

a fully assembled JWS using the JSON compact serialisation.

Throws:

EncodingException - On error during encoding.

JOSEException - If the algorithm is not supported.

ParseException - If an error occurs during serialisation.

assembleMacJws

@Nonnull
public static SignedJWT assembleMacJws(@Nonnull
 JWSAlgorithm algorithm,
 @Nonnull
 JWTClaimsSet claimsSet,
 @Nonnull
 byte[] secret)
                                throws EncodingException,
JOSEException,
ParseException

Assemble a HMAC based JSON Web Signature token (JWS) using the given algorithm, claims, and secret.

Note, does not check key to algorithm compatibility, use Nimbus's MACSigner directly for the additional safety checks it has. This can therefore be used over the Nimbus signer on occasions where an algorithm to secret key incompatibility exists e.g. using a HS512 HMAC with too small a secret key.

Parameters:

algorithm - the JWA algorithm, **must** be one from the HMAC family.

claimsSet - the claims that form the payload.

secret - the pre-shared secret used to construct the HMAC.

Returns:

a fully assembled signed JWT.

Throws:

EncodingException - On error during encoding.

JOSEException - If the algorithm is not supported.

ParseException - If an error occurs during serialisation.

getSecretBytes

@Nonnull
public static byte[] getSecretBytes(@Nonnull
 String secret)

Convert the given secret into its byte representation assuming a UTF-8 character set.

Parameters:

secret - the secret.

Returns:

the UTF-8 byte representation of the secret.

composeSigningInput

@Nonnull
private static String composeSigningInput(@Nonnull
 JWSHeader header,
 @Nonnull
 Payload payload)
                                   throws EncodingException

Compose the message that is to be signed.

Returns a JWS Signing Input. RFC7515; ASCII(BASE64URL(UTF8(JWS Protected Header)) || '.' || BASE64URL(JWS Payload)

Parameters:

header - the header component of the message to be signed.

payload - the payload component of the message to be signed.

Returns:

the JWS signing input ready to be signed.

Throws:

EncodingException - if there is an error base64 encoding the components.

getJCAAlgorithmName

@Nonnull
private static String getJCAAlgorithmName(@Nonnull
 JWSAlgorithm alg)
                                   throws JOSEException

Gets the matching Java Cryptography Architecture (JCA) algorithm name for the specified HMAC-based JSON Web Algorithm (JWA).

This is taken from the Nimbus MACProvider class.

Parameters:

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

Returns:

The matching JCA algorithm name.

Throws:

JOSEException - If the algorithm is not supported.