org.apache.kerby.kerberos.kerb.common

Class EncryptionUtil

java.lang.Object

org.apache.kerby.kerberos.kerb.common.EncryptionUtil

public class EncryptionUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
EncryptionUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	decrypt(EncryptionKey key, byte[] cipherData, KeyUsage usage)
static byte[]	encrypt(EncryptionKey key, byte[] plaintext, KeyUsage usage)
static List<EncryptionKey>	generateKeys(List<EncryptionType> encryptionTypes)
static List<EncryptionKey>	generateKeys(String principal, String passwd, List<EncryptionType> encryptionTypes)
static String	getAlgoNameFromEncType(EncryptionType encType)
static EncryptionType	getBestEncryptionType(List<EncryptionType> requestedTypes, List<EncryptionType> configuredTypes)
static List<EncryptionType>	orderEtypesByStrength(List<EncryptionType> etypes) Order a list of EncryptionType in a decreasing strength order
static EncryptedData	seal(org.apache.kerby.asn1.type.Asn1Encodeable asn1Type, EncryptionKey key, KeyUsage usage)
static <T extends org.apache.kerby.asn1.type.Asn1Type> T	unseal(EncryptedData encrypted, EncryptionKey key, KeyUsage usage, Class<T> krbType)

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptionUtil

public EncryptionUtil()

Method Detail

getAlgoNameFromEncType

public static String getAlgoNameFromEncType(EncryptionType encType)

orderEtypesByStrength

public static List<EncryptionType> orderEtypesByStrength(List<EncryptionType> etypes)

Order a list of EncryptionType in a decreasing strength order

Parameters:

etypes - The ETypes to order

Returns:

A list of ordered ETypes. The strongest is on the left.

generateKeys

public static List<EncryptionKey> generateKeys(List<EncryptionType> encryptionTypes)
                                        throws KrbException

Throws:

KrbException

generateKeys

public static List<EncryptionKey> generateKeys(String principal,
                                               String passwd,
                                               List<EncryptionType> encryptionTypes)
                                        throws KrbException

Throws:

KrbException

getBestEncryptionType

public static EncryptionType getBestEncryptionType(List<EncryptionType> requestedTypes,
                                                   List<EncryptionType> configuredTypes)

seal

public static EncryptedData seal(org.apache.kerby.asn1.type.Asn1Encodeable asn1Type,
                                 EncryptionKey key,
                                 KeyUsage usage)
                          throws KrbException

Throws:

KrbException

unseal

public static <T extends org.apache.kerby.asn1.type.Asn1Type> T unseal(EncryptedData encrypted,
                                                                       EncryptionKey key,
                                                                       KeyUsage usage,
                                                                       Class<T> krbType)
                                                                throws KrbException

Throws:

KrbException

encrypt

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

Throws:

KrbException

decrypt

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

Throws:

KrbException