com.sun.management.snmp.usm
Class SnmpUsmDesAlgorithm

java.lang.Object
  com.sun.management.snmp.usm.SnmpUsmDesAlgorithm

All Implemented Interfaces:

SnmpUsmAlgorithm, SnmpUsmPrivAlgorithm

public class SnmpUsmDesAlgorithm
extends Object
implements SnmpUsmPrivAlgorithm

This is an implementation of Des encryption algorithm. It is based on JCE. If you use this algorithm, make sure that JCE jar files are accessible.

Since:

Java DMK 5.1

Field Summary

static String

DES_PRIV Algorithm name as defined in rfc 2574, "usmDESPrivProtocol".

Constructor Summary

SnmpUsmDesAlgorithm(SnmpEngine engine)
Constructor.

SnmpUsmDesAlgorithm(SnmpEngine engine, String properties_encrypt, String properties_decrypt)
Constructor.

Method Summary

byte[]	decrypt(byte[] key, com.sun.management.internal.snmp.SnmpEncryptionPair pair) Decrypts the passed encrypted data using the provided IV parameter.
com.sun.management.internal.snmp.SnmpEncryptionPair	encrypt(byte[] key, byte[] data, int dataLength) Encrypts the passed data with the provided key.
String	getAlgorithm() Gets the unique algorithm name.
int	getDeltaSize() Gets the delta size.
int	getKeySize() The privacy algorithm key size.
String	getOid() Gets the algorithm OID as defined in RFC 2574.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.sun.management.snmp.usm.SnmpUsmAlgorithm

getAlgorithm

Field Detail

DES_PRIV

public static final String DES_PRIV

Algorithm name as defined in rfc 2574, "usmDESPrivProtocol".

See Also:

Constant Field Values

Constructor Detail

SnmpUsmDesAlgorithm

public SnmpUsmDesAlgorithm(SnmpEngine engine)
                    throws SnmpUsmException

Constructor.

Parameters:

engine - The local snmp engine.

Throws:

SnmpUsmException

SnmpUsmDesAlgorithm

public SnmpUsmDesAlgorithm(SnmpEngine engine,
                           String properties_encrypt,
                           String properties_decrypt)
                    throws SnmpUsmException

Constructor.

Parameters:

engine - The local SNMP engine.

properties_encrypt - The String used to instantiate the proper JCE Cipher encryption object.

properties_decrypt - The String used to instantiate the proper JCE Cipher decryption object.

Throws:

SnmpUsmException

Method Detail

getKeySize

public int getKeySize()

The privacy algorithm key size.

Specified by:

getKeySize in interface SnmpUsmPrivAlgorithm

Returns:

The key size.

getDeltaSize

public int getDeltaSize()

Gets the delta size. The returned value is 16.

Specified by:

getDeltaSize in interface SnmpUsmAlgorithm

Specified by:

getDeltaSize in interface SnmpUsmPrivAlgorithm

Returns:

The delta size.

getOid

public String getOid()

Gets the algorithm OID as defined in RFC 2574.

Specified by:

getOid in interface SnmpUsmAlgorithm

Returns:

The OID 1.3.6.1.6.3.10.1.2.2

encrypt

public com.sun.management.internal.snmp.SnmpEncryptionPair encrypt(byte[] key,
                                                                   byte[] data,
                                                                   int dataLength)
                                                            throws SnmpUsmException

Encrypts the passed data with the provided key.

Specified by:

encrypt in interface SnmpUsmPrivAlgorithm

Parameters:

key - The key to use.

data - The data to encrypt.

dataLength - The data length.

Returns:

The encrypted data + IV parameter.

Throws:

SnmpUsmException

decrypt

public byte[] decrypt(byte[] key,
                      com.sun.management.internal.snmp.SnmpEncryptionPair pair)
               throws SnmpUsmException

Decrypts the passed encrypted data using the provided IV parameter.

Specified by:

decrypt in interface SnmpUsmPrivAlgorithm

Parameters:

key - The Des key.

pair - The data + IV parameter.

Returns:

the decrypted data.

Throws:

SnmpUsmException

getAlgorithm

public String getAlgorithm()

Description copied from interface: SnmpUsmAlgorithm

Gets the unique algorithm name.

Specified by:

getAlgorithm in interface SnmpUsmAlgorithm

Returns:

Algorithm name.