org.apache.directory.server.kerberos.shared.crypto.encryption

Class Des3CbcSha1KdEncryption

java.lang.Object

org.apache.directory.server.kerberos.shared.crypto.encryption.EncryptionEngine

org.apache.directory.server.kerberos.shared.crypto.encryption.Des3CbcSha1KdEncryption

All Implemented Interfaces:

ChecksumEngine

public class Des3CbcSha1KdEncryption
extends EncryptionEngine
implements ChecksumEngine

Author:

Apache Directory Project

Constructor Summary

Constructors

Constructor and Description
Des3CbcSha1KdEncryption()

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	calculateChecksum(byte[] data, byte[] key, KeyUsage usage) Calculate a checksum given raw bytes and an (optional) key.
byte[]	calculateIntegrity(byte[] data, byte[] key, KeyUsage usage)
ChecksumType	checksumType() Returns the checksum type of this checksum engine.
byte[]	decrypt(byte[] cipherText, byte[] keyBytes)
protected byte[]	deriveKey(byte[] baseKey, byte[] usage, int n, int k) Derived Key = DK(Base Key, Well-Known Constant) DK(Key, Constant) = random-to-key(DR(Key, Constant)) DR(Key, Constant) = k-truncate(E(Key, Constant, initial-cipher-state))
byte[]	encrypt(byte[] plainText, byte[] keyBytes)
protected byte[]	getBitGroup(byte[] seed, int group)
int	getChecksumLength()
int	getConfounderLength()
byte[]	getDecryptedData(EncryptionKey key, EncryptedData data, KeyUsage usage)
EncryptedData	getEncryptedData(EncryptionKey key, byte[] plainText, KeyUsage usage)
EncryptionType	getEncryptionType()
protected byte[]	randomToKey(byte[] seed)
protected byte[]	setParity(byte[] in)

Methods inherited from class org.apache.directory.server.kerberos.shared.crypto.encryption.EncryptionEngine

concatenateBytes, deriveRandom, getBit, getRandomBytes, getUsageKc, getUsageKe, getUsageKi, padString, removeLeadingBytes, removeTrailingBytes, setBit

Methods inherited from class java.lang.Object

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

Constructor Detail

Des3CbcSha1KdEncryption

public Des3CbcSha1KdEncryption()

Method Detail

getEncryptionType

public EncryptionType getEncryptionType()

Specified by:

getEncryptionType in class EncryptionEngine

getConfounderLength

public int getConfounderLength()

Specified by:

getConfounderLength in class EncryptionEngine

getChecksumLength

public int getChecksumLength()

Specified by:

getChecksumLength in class EncryptionEngine

checksumType

public ChecksumType checksumType()

Description copied from interface: ChecksumEngine

Returns the checksum type of this checksum engine.

Specified by:

checksumType in interface ChecksumEngine

Returns:

The checksum type.

calculateChecksum

public byte[] calculateChecksum(byte[] data,
                       byte[] key,
                       KeyUsage usage)

Description copied from interface: ChecksumEngine

Calculate a checksum given raw bytes and an (optional) key.

Specified by:

calculateChecksum in interface ChecksumEngine

Returns:

The checksum value.

calculateIntegrity

public byte[] calculateIntegrity(byte[] data,
                        byte[] key,
                        KeyUsage usage)

Specified by:

calculateIntegrity in class EncryptionEngine

getDecryptedData

public byte[] getDecryptedData(EncryptionKey key,
                      EncryptedData data,
                      KeyUsage usage)
                        throws KerberosException

Specified by:

getDecryptedData in class EncryptionEngine

Throws:

KerberosException

getEncryptedData

public EncryptedData getEncryptedData(EncryptionKey key,
                             byte[] plainText,
                             KeyUsage usage)

Specified by:

getEncryptedData in class EncryptionEngine

encrypt

public byte[] encrypt(byte[] plainText,
             byte[] keyBytes)

Specified by:

encrypt in class EncryptionEngine

decrypt

public byte[] decrypt(byte[] cipherText,
             byte[] keyBytes)

Specified by:

decrypt in class EncryptionEngine

deriveKey

protected byte[] deriveKey(byte[] baseKey,
               byte[] usage,
               int n,
               int k)

Derived Key = DK(Base Key, Well-Known Constant) DK(Key, Constant) = random-to-key(DR(Key, Constant)) DR(Key, Constant) = k-truncate(E(Key, Constant, initial-cipher-state))

randomToKey

protected byte[] randomToKey(byte[] seed)

getBitGroup

protected byte[] getBitGroup(byte[] seed,
                 int group)

setParity

protected byte[] setParity(byte[] in)