io.jsonwebtoken.impl.crypto

Class MacSigner

java.lang.Object

io.jsonwebtoken.impl.crypto.MacProvider

io.jsonwebtoken.impl.crypto.MacSigner

All Implemented Interfaces:

Signer

public class MacSigner
extends MacProvider
implements Signer

Field Summary

Fields

Modifier and Type	Field and Description
protected SignatureAlgorithm	alg
static java.security.SecureRandom	DEFAULT_SECURE_RANDOM JJWT's default SecureRandom number generator.
protected java.security.Key	key

Constructor Summary

Constructors

Constructor and Description
MacSigner(SignatureAlgorithm alg, byte[] key)
MacSigner(SignatureAlgorithm alg, java.security.Key key)

Method Summary

Methods

Modifier and Type	Method and Description
protected java.security.Signature	createSignatureInstance()
protected javax.crypto.Mac	doGetMacInstance()
protected javax.crypto.Mac	getMacInstance()
protected java.security.Signature	getSignatureInstance()
protected boolean	isBouncyCastleAvailable()
byte[]	sign(byte[] data)

Methods inherited from class io.jsonwebtoken.impl.crypto.MacProvider

generateKey, generateKey, generateKey

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SECURE_RANDOM

public static final java.security.SecureRandom DEFAULT_SECURE_RANDOM

JJWT's default SecureRandom number generator. This RNG is initialized using the JVM default as follows:

 static {
     DEFAULT_SECURE_RANDOM = new SecureRandom();
     DEFAULT_SECURE_RANDOM.nextBytes(new byte[64]);
 }
 

nextBytes is called to force the RNG to initialize itself if not already initialized. The byte array is not used and discarded immediately for garbage collection.

alg

protected final SignatureAlgorithm alg

key

protected final java.security.Key key

Constructor Detail

MacSigner

public MacSigner(SignatureAlgorithm alg,
         byte[] key)

MacSigner

public MacSigner(SignatureAlgorithm alg,
         java.security.Key key)

Method Detail

sign

public byte[] sign(byte[] data)

Specified by:

sign in interface Signer

getMacInstance

protected javax.crypto.Mac getMacInstance()
                                   throws SignatureException

Throws:

SignatureException

doGetMacInstance

protected javax.crypto.Mac doGetMacInstance()
                                     throws java.security.NoSuchAlgorithmException,
                                            java.security.InvalidKeyException

Throws:

java.security.NoSuchAlgorithmException

java.security.InvalidKeyException

createSignatureInstance

protected java.security.Signature createSignatureInstance()

getSignatureInstance

protected java.security.Signature getSignatureInstance()
                                                throws java.security.NoSuchAlgorithmException

Throws:

java.security.NoSuchAlgorithmException

isBouncyCastleAvailable

protected boolean isBouncyCastleAvailable()