com.fr.cert.token.impl.crypto

类 MacProvider

java.lang.Object

com.fr.cert.token.impl.crypto.MacProvider

直接已知子类:

MacSigner

public abstract class MacProvider
extends java.lang.Object

字段概要

字段

限定符和类型	字段和说明
protected SignatureAlgorithm	alg
static java.security.SecureRandom	DEFAULT_SECURE_RANDOM JJWT's default SecureRandom number generator.
protected java.security.Key	key

构造器概要

构造器

限定符	构造器和说明
protected	MacProvider(SignatureAlgorithm alg, java.security.Key key)

方法概要

方法

限定符和类型	方法和说明
protected java.security.Signature	createSignatureInstance()
static javax.crypto.SecretKey	generateKey() Generates a new secure-random 512 bit secret key suitable for creating and verifying HMAC signatures.
static javax.crypto.SecretKey	generateKey(SignatureAlgorithm alg) Generates a new secure-random secret key of a length suitable for creating and verifying HMAC signatures according to the specified SignatureAlgorithm using JJWT's default SecureRandom instance.
static javax.crypto.SecretKey	generateKey(SignatureAlgorithm alg, java.security.SecureRandom random) Generates a new secure-random secret key of a length suitable for creating and verifying HMAC signatures according to the specified SignatureAlgorithm using the specified SecureRandom number generator.
protected java.security.Signature	getSignatureInstance()
protected boolean	isBouncyCastleAvailable()

从类继承的方法 java.lang.Object

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

字段详细资料

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

构造器详细资料

MacProvider

protected MacProvider(SignatureAlgorithm alg,
           java.security.Key key)

方法详细资料

generateKey

public static javax.crypto.SecretKey generateKey()

Generates a new secure-random 512 bit secret key suitable for creating and verifying HMAC signatures. This is a convenience method that immediately delegates to generateKey(SignatureAlgorithm) using SignatureAlgorithm.HS512 as the method argument.

返回:

a new secure-random 512 bit secret key suitable for creating and verifying HMAC signatures.

从以下版本开始:

0.5

另请参阅:

generateKey(SignatureAlgorithm), generateKey(SignatureAlgorithm, SecureRandom)

generateKey

public static javax.crypto.SecretKey generateKey(SignatureAlgorithm alg)

Generates a new secure-random secret key of a length suitable for creating and verifying HMAC signatures according to the specified SignatureAlgorithm using JJWT's default SecureRandom instance. This is a convenience method that immediately delegates to generateKey(SignatureAlgorithm, SecureRandom).

参数:

alg - the desired signature algorithm

返回:

a new secure-random secret key of a length suitable for creating and verifying HMAC signatures according to the specified SignatureAlgorithm using JJWT's default SecureRandom instance.

从以下版本开始:

0.5

另请参阅:

generateKey(), generateKey(SignatureAlgorithm, SecureRandom)

generateKey

public static javax.crypto.SecretKey generateKey(SignatureAlgorithm alg,
                                 java.security.SecureRandom random)

Generates a new secure-random secret key of a length suitable for creating and verifying HMAC signatures according to the specified SignatureAlgorithm using the specified SecureRandom number generator. This implementation returns secure-random key sizes as follows:

Key Sizes

Signature Algorithm	Generated Key Size
HS256	256 bits (32 bytes)
HS384	384 bits (48 bytes)
HS512	512 bits (64 bytes)

参数:

alg - the signature algorithm that will be used with the generated key

random - the secure random number generator used during key generation

返回:

a new secure-random secret key of a length suitable for creating and verifying HMAC signatures according to the specified SignatureAlgorithm using the specified SecureRandom number generator.

从以下版本开始:

0.5

另请参阅:

generateKey(), generateKey(SignatureAlgorithm)

createSignatureInstance

protected java.security.Signature createSignatureInstance()

getSignatureInstance

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

抛出:

java.security.NoSuchAlgorithmException

isBouncyCastleAvailable

protected boolean isBouncyCastleAvailable()