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

Class EncryptionEngine

java.lang.Object

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

Direct Known Subclasses:

Aes128CtsSha1Encryption, Aes256CtsSha1Encryption, Des3CbcSha1KdEncryption, DesCbcCrcEncryption

public abstract class EncryptionEngine
extends Object

Author:

Apache Directory Project

Constructor Summary

Constructors

Constructor and Description
EncryptionEngine()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract byte[]	calculateIntegrity(byte[] plainText, byte[] key, KeyUsage usage)
protected byte[]	concatenateBytes(byte[] array1, byte[] array2)
protected abstract byte[]	decrypt(byte[] cipherText, byte[] key)
protected byte[]	deriveRandom(byte[] key, byte[] usage, int n, int k)
protected abstract byte[]	encrypt(byte[] plainText, byte[] key)
protected int	getBit(byte[] data, int pos)
protected abstract int	getChecksumLength()
protected abstract int	getConfounderLength()
protected abstract byte[]	getDecryptedData(EncryptionKey key, EncryptedData data, KeyUsage usage)
protected abstract EncryptedData	getEncryptedData(EncryptionKey key, byte[] plainText, KeyUsage usage)
protected abstract EncryptionType	getEncryptionType()
protected byte[]	getRandomBytes(int size)
protected byte[]	getUsageKc(KeyUsage usage) The "well-known constant" used for the DK function is the key usage number, expressed as four octets in big-endian order, followed by one octet indicated below.
protected byte[]	getUsageKe(KeyUsage usage) The "well-known constant" used for the DK function is the key usage number, expressed as four octets in big-endian order, followed by one octet indicated below.
protected byte[]	getUsageKi(KeyUsage usage) The "well-known constant" used for the DK function is the key usage number, expressed as four octets in big-endian order, followed by one octet indicated below.
protected byte[]	padString(byte[] encodedString)
protected byte[]	removeLeadingBytes(byte[] array, int confounder, int checksum)
protected byte[]	removeTrailingBytes(byte[] array, int confounder, int checksum)
protected void	setBit(byte[] data, int pos, int val)

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptionEngine

public EncryptionEngine()

Method Detail

getDecryptedData

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

Throws:

KerberosException

getEncryptedData

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

getEncryptionType

protected abstract EncryptionType getEncryptionType()

getConfounderLength

protected abstract int getConfounderLength()

getChecksumLength

protected abstract int getChecksumLength()

encrypt

protected abstract byte[] encrypt(byte[] plainText,
             byte[] key)

decrypt

protected abstract byte[] decrypt(byte[] cipherText,
             byte[] key)

calculateIntegrity

protected abstract byte[] calculateIntegrity(byte[] plainText,
                        byte[] key,
                        KeyUsage usage)

deriveRandom

protected byte[] deriveRandom(byte[] key,
                  byte[] usage,
                  int n,
                  int k)

getRandomBytes

protected byte[] getRandomBytes(int size)

padString

protected byte[] padString(byte[] encodedString)

concatenateBytes

protected byte[] concatenateBytes(byte[] array1,
                      byte[] array2)

removeLeadingBytes

protected byte[] removeLeadingBytes(byte[] array,
                        int confounder,
                        int checksum)

removeTrailingBytes

protected byte[] removeTrailingBytes(byte[] array,
                         int confounder,
                         int checksum)

getBit

protected int getBit(byte[] data,
         int pos)

setBit

protected void setBit(byte[] data,
          int pos,
          int val)

getUsageKc

protected byte[] getUsageKc(KeyUsage usage)

The "well-known constant" used for the DK function is the key usage number, expressed as four octets in big-endian order, followed by one octet indicated below. Kc = DK(base-key, usage | 0x99);

getUsageKe

protected byte[] getUsageKe(KeyUsage usage)

The "well-known constant" used for the DK function is the key usage number, expressed as four octets in big-endian order, followed by one octet indicated below. Ke = DK(base-key, usage | 0xAA);

getUsageKi

protected byte[] getUsageKi(KeyUsage usage)

The "well-known constant" used for the DK function is the key usage number, expressed as four octets in big-endian order, followed by one octet indicated below. Ki = DK(base-key, usage | 0x55);