org.apache.kerby.kerberos.kerb.crypto

Class EncryptionHandler

java.lang.Object

org.apache.kerby.kerberos.kerb.crypto.EncryptionHandler

public class EncryptionHandler
extends Object

Encryption handler as the highest level API for encryption stuffs defined in Kerberos RFC3961. It supports all the encryption types. New encryption type should be added updating this.

Constructor Summary

Constructors

Constructor and Description
EncryptionHandler()

Method Summary

Modifier and Type	Method and Description
static byte[]	decrypt(byte[] data, EncryptionKey key, KeyUsage usage) Decrypt with the encryption key and key usage.
static byte[]	decrypt(EncryptedData data, EncryptionKey key, KeyUsage usage) Decrypt with the encryption key and key usage.
static EncryptedData	encrypt(byte[] plainText, EncryptionKey key, KeyUsage usage) Encrypt with the encryption key and key usage.
static EncTypeHandler	getEncHandler(EncryptionType eType) Get the encryption handler.
static EncTypeHandler	getEncHandler(int eType) Get the encryption handler.
static EncTypeHandler	getEncHandler(String eType) Get the encryption handler.
static EncryptionType	getEncryptionType(String eType) Get the encryption type.
static boolean	isImplemented(EncryptionType eType) Return true if the the encryption handler is implemented.
static EncryptionKey	makeSubkey(EncryptionKey encKey) Generate a secure and random key seeded with an existing encryption key.
static EncryptionKey	random2Key(EncryptionType eType) Random to key.
static EncryptionKey	random2Key(EncryptionType eType, byte[] randomBytes) Random to key.
static EncryptionKey	string2Key(String string, String salt, byte[] s2kparams, EncryptionType eType) String to key.
static EncryptionKey	string2Key(String principalName, String passPhrase, EncryptionType eType) String to key.

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptionHandler

public EncryptionHandler()

Method Detail

getEncryptionType

public static EncryptionType getEncryptionType(String eType)
                                        throws KrbException

Get the encryption type.

Parameters:

eType - The encryption type string.

Returns:

The EncryptionType

Throws:

KrbException - e

getEncHandler

public static EncTypeHandler getEncHandler(String eType)
                                    throws KrbException

Get the encryption handler.

Parameters:

eType - The encryption type string

Returns:

The EncTypeHandler

Throws:

KrbException - e

getEncHandler

public static EncTypeHandler getEncHandler(int eType)
                                    throws KrbException

Get the encryption handler.

Parameters:

eType - The encryption type int

Returns:

The EncTypeHandler

Throws:

KrbException - e

getEncHandler

public static EncTypeHandler getEncHandler(EncryptionType eType)
                                    throws KrbException

Get the encryption handler.

Parameters:

eType - The encryption type

Returns:

The EncTypeHandler

Throws:

KrbException - e

encrypt

public static EncryptedData encrypt(byte[] plainText,
                                    EncryptionKey key,
                                    KeyUsage usage)
                             throws KrbException

Encrypt with the encryption key and key usage.

Parameters:

plainText - The plain test

key - The encryption key

usage - The key usage

Returns:

The encrypted data

Throws:

KrbException - e

decrypt

public static byte[] decrypt(byte[] data,
                             EncryptionKey key,
                             KeyUsage usage)
                      throws KrbException

Decrypt with the encryption key and key usage.

Parameters:

data - The encrypted data

key - The encryption key

usage - The key usage

Returns:

The decrypted data

Throws:

KrbException - e

decrypt

public static byte[] decrypt(EncryptedData data,
                             EncryptionKey key,
                             KeyUsage usage)
                      throws KrbException

Decrypt with the encryption key and key usage.

Parameters:

data - The encrypted data

key - The encryption key

usage - The key usage

Returns:

The decrypted data

Throws:

KrbException - e

isImplemented

public static boolean isImplemented(EncryptionType eType)

Return true if the the encryption handler is implemented.

Parameters:

eType - The encryption type

Returns:

true if the encryption handler is implemented

string2Key

public static EncryptionKey string2Key(String principalName,
                                       String passPhrase,
                                       EncryptionType eType)
                                throws KrbException

String to key.

Parameters:

principalName - The principal name

passPhrase - The pass phrase

eType - The encryption type

Returns:

The encryption key

Throws:

KrbException - e

string2Key

public static EncryptionKey string2Key(String string,
                                       String salt,
                                       byte[] s2kparams,
                                       EncryptionType eType)
                                throws KrbException

String to key.

Parameters:

string - The string

salt - The salt

s2kparams - The params

eType - The encryption type

Returns:

The encryption key

Throws:

KrbException - e

random2Key

public static EncryptionKey random2Key(EncryptionType eType)
                                throws KrbException

Random to key.

Parameters:

eType - The encryption type

Returns:

The encryption key

Throws:

KrbException - e

random2Key

public static EncryptionKey random2Key(EncryptionType eType,
                                       byte[] randomBytes)
                                throws KrbException

Random to key.

Parameters:

eType - The encryption type

randomBytes - The random bytes

Returns:

The encryption key

Throws:

KrbException - e

makeSubkey

public static EncryptionKey makeSubkey(EncryptionKey encKey)

Generate a secure and random key seeded with an existing encryption key.

Parameters:

encKey - The encryption key

Returns:

encryption key