com.rsa.ace.techservice.cipher
Class AbstractAgentCipherProvider

java.lang.Object
  com.rsa.ace.techservice.cipher.AbstractAgentCipherProvider

All Implemented Interfaces:

AgentCipherProvider

Direct Known Subclasses:

AgentNULLCipher, AgentRC5SHA1Cipher

public abstract class AbstractAgentCipherProvider
extends java.lang.Object
implements AgentCipherProvider

Abstract Cipher Provider implementation. Provides common functions and data for cipher providers and a ByteBuffer into which and from which the specific provider can encrypt & decrypt.

Constructor Summary

AbstractAgentCipherProvider()
Constructor.

Method Summary

int	getMajorVersion() Get the major version of the cipher provider.
int	getMaxEncryptedSize(int inputSize) This function provides the maximium amount of expansion encryption adds to a packet.
int	getMinorVersion() Get the minor version of the cipher provider.
void	setBufferArray(byte[] sourceData) Sets the buffer data to the array provided.
void	setMajorVersion(int majorVersion) Set the major version of the cipher provider.
void	setMinorVersion(int minorVersion) Set the minor version of the cipher provider.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.rsa.ace.techservice.cipher.AgentCipherProvider

decryptPacket, encryptPacket, getCipherID, setKey

Constructor Detail

AbstractAgentCipherProvider

public AbstractAgentCipherProvider()
                            throws AgentCipherException

Constructor. This initializes the random object. The ByteBuffer is left uninitialized until set with the "setBufferArray()" method.

Throws:

AgentCipherException - If an instance of the random object cannot be obtained.

Method Detail

setBufferArray

public void setBufferArray(byte[] sourceData)
                    throws AgentCipherException

Sets the buffer data to the array provided. When encrypting data, this is set to the destination buffer. It is set to the source when decrypting. This must be called before the setHeader/setLength or getHeader() methods can be invoked.

Parameters:

sourceData - The array from which the byte buffer should take the data.

Throws:

AgentCipherException - If the byte buffer allocation fails.

getMajorVersion

public int getMajorVersion()

Get the major version of the cipher provider.

Returns:

The major version.

getMinorVersion

public int getMinorVersion()

Get the minor version of the cipher provider.

Returns:

The minor version.

setMajorVersion

public void setMajorVersion(int majorVersion)

Set the major version of the cipher provider.

Parameters:

majorVersion - The new major version.

setMinorVersion

public void setMinorVersion(int minorVersion)

Set the minor version of the cipher provider.

Parameters:

minorVersion - The new minor version.

getMaxEncryptedSize

public int getMaxEncryptedSize(int inputSize)

This function provides the maximium amount of expansion encryption adds to a packet. Other cipher providers can override this if they add more overhead.

Specified by:

getMaxEncryptedSize in interface AgentCipherProvider

Parameters:

inputSize - The size of the cleartext input.

Returns:

The number of extra bytes required for the given input packet size.