edu.vt.middleware.crypt
Class CryptProvider

java.lang.Object
  edu.vt.middleware.crypt.CryptProvider

public final class CryptProvider
extends Object

CryptProvider contains methods for finding cryptographic objects using a set of providers.

Version:

$Revision: 3 $

Author:

Middleware Services

Field Summary

static int

RANDOM_BYTE_ARRAY_SIZE Default size of random byte array.

Method Summary

static void	addProvider(Provider provider, String name) This will add an additional security provider.
static CertificateFactory	getCertificateFactory(String type) This creates a CertificateFactory using the supplied type name.
static Cipher	getCipher(String algorithm, String mode, String padding) This finds a Cipher using the known providers and the supplied parameters.
static KeyFactory	getKeyFactory(String algorithm) This finds a KeyFactory using the known providers and the supplied algorithm parameter.
static KeyGenerator	getKeyGenerator(String algorithm) This finds a KeyGenerator using the known providers and the supplied algorithm parameter.
static KeyPairGenerator	getKeyPairGenerator(String algorithm) This finds a KeyPairGenerator using the known providers and the supplied algorithm parameter.
static KeyStore	getKeyStore() This creates a KeyStore using the default keystore type.
static KeyStore	getKeyStore(String type) This creates a KeyStore using the supplied type name.
static MessageDigest	getMessageDigest(String algorithm) This creates a MessageDigest using the supplied algorithm name.
static SecretKeyFactory	getSecretKeyFactory(String algorithm) This finds a SecretKeyFactory using the known providers and the supplied algorithm parameter.
static Signature	getSignature(String digestAlgorithm, String algorithm, String padding) This finds a Signature using the known providers and the supplied parameters.

Methods inherited from class java.lang.Object

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

Field Detail

RANDOM_BYTE_ARRAY_SIZE

public static final int RANDOM_BYTE_ARRAY_SIZE

Default size of random byte array.

See Also:

Constant Field Values

Method Detail

addProvider

public static void addProvider(Provider provider,
                               String name)

This will add an additional security provider.

Parameters:

provider - Provider

name - String

getCipher

public static Cipher getCipher(String algorithm,
                               String mode,
                               String padding)
                        throws CryptException

This finds a Cipher using the known providers and the supplied parameters.

Parameters:

algorithm - String name

mode - String name

padding - String name

Returns:

Cipher

Throws:

CryptException - if the algorithm is not available from any provider or if the provider is not available in the environment

getSecretKeyFactory

public static SecretKeyFactory getSecretKeyFactory(String algorithm)
                                            throws CryptException

This finds a SecretKeyFactory using the known providers and the supplied algorithm parameter.

Parameters:

algorithm - String name

Returns:

SecretKeyFactory

Throws:

CryptException - if the algorithm is not available from any provider or if the provider is not available in the environment

getKeyFactory

public static KeyFactory getKeyFactory(String algorithm)
                                throws CryptException

This finds a KeyFactory using the known providers and the supplied algorithm parameter.

Parameters:

algorithm - String name

Returns:

KeyFactory

Throws:

CryptException - if the algorithm is not available from any provider or if the provider is not available in the environment

getKeyGenerator

public static KeyGenerator getKeyGenerator(String algorithm)
                                    throws CryptException

This finds a KeyGenerator using the known providers and the supplied algorithm parameter.

Parameters:

algorithm - String name

Returns:

KeyGenerator

Throws:

CryptException - if the algorithm is not available from any provider or if the provider is not available in the environment

getKeyPairGenerator

public static KeyPairGenerator getKeyPairGenerator(String algorithm)
                                            throws CryptException

This finds a KeyPairGenerator using the known providers and the supplied algorithm parameter.

Parameters:

algorithm - String name

Returns:

KeyPairGenerator

Throws:

CryptException - if the algorithm is not available from any provider or if the provider is not available in the environment

getSignature

public static Signature getSignature(String digestAlgorithm,
                                     String algorithm,
                                     String padding)
                              throws CryptException

This finds a Signature using the known providers and the supplied parameters.

Parameters:

digestAlgorithm - String name

algorithm - String name

padding - String name

Returns:

Signature

Throws:

CryptException - if the algorithm is not available from any provider or if the provider is not available in the environment

getMessageDigest

public static MessageDigest getMessageDigest(String algorithm)
                                      throws CryptException

This creates a MessageDigest using the supplied algorithm name.

Parameters:

algorithm - String name

Returns:

MessageDigest

Throws:

CryptException - if the algorithm is not available from any provider or the provider is not available in the environment

getKeyStore

public static KeyStore getKeyStore(String type)
                            throws CryptException

This creates a KeyStore using the supplied type name.

Parameters:

type - String

Returns:

KeyStore

Throws:

CryptException - if the type is not available from any provider or the provider is not available in the environment

getKeyStore

public static KeyStore getKeyStore()
                            throws CryptException

This creates a KeyStore using the default keystore type.

Returns:

KeyStore

Throws:

CryptException - if the default type is not available from any provider or the provider is not available in the environment

getCertificateFactory

public static CertificateFactory getCertificateFactory(String type)
                                                throws CryptException

This creates a CertificateFactory using the supplied type name.

Parameters:

type - String

Returns:

CertificateFactory

Throws:

CryptException - if the type is not available from any provider or the provider is not available in the environment