Package org.tinyradius.core.attribute.codec

Class BaseCodec

java.lang.Object

org.tinyradius.core.attribute.codec.BaseCodec

public abstract class BaseCodec
extends Object

Constructor Summary

Constructors

Constructor	Description
BaseCodec()

Method Summary

Modifier and Type	Method	Description
byte[]	decode(byte[] data, byte[] requestAuth, String sharedSecret)	Decodes the passed encoded attribute data and returns the cleartext form as bytes
protected abstract byte[]	decodeData(byte[] encodedData, byte[] auth, byte[] secret)
byte[]	encode(byte[] data, byte[] requestAuth, String sharedSecret)	Encodes plaintext data
protected abstract byte[]	encodeData(byte[] data, byte[] auth, byte[] secret)
protected byte[]	md5(byte[] a, byte[] b)
protected static byte[]	pad16x(byte[] val)
protected static byte[]	xor16(byte[] src1, int src1offset, byte[] src2)

Methods inherited from class java.lang.Object

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

Constructor Details

BaseCodec

public BaseCodec()

Method Details

encode

public byte[] encode(byte[] data,
 byte[] requestAuth,
 String sharedSecret)
              throws RadiusPacketException

Encodes plaintext data

Parameters:

data - the data to encrypt

requestAuth - packet authenticator

sharedSecret - shared secret

Returns:

the byte array containing the encrypted data

Throws:

RadiusPacketException - errors encoding attribute data

decode

public byte[] decode(byte[] data,
 byte[] requestAuth,
 String sharedSecret)
              throws RadiusPacketException

Decodes the passed encoded attribute data and returns the cleartext form as bytes

Parameters:

data - data to decrypt, excl. type/length/tag

requestAuth - packet authenticator

sharedSecret - shared secret

Returns:

decrypted data

Throws:

RadiusPacketException - errors decoding attribute data

encodeData

protected abstract byte[] encodeData(byte[] data,
 byte[] auth,
 byte[] secret)

Parameters:

data - data to encrypt, excl. derived/random generated data e.g. salt/length/padding

auth - request authenticator

secret - shared secret

Returns:

byte array representing salt+string

decodeData

protected abstract byte[] decodeData(byte[] encodedData,
 byte[] auth,
 byte[] secret)
                              throws RadiusPacketException

Parameters:

encodedData - byte array representing salt+string

auth - request authenticator

secret - shared secret

Returns:

password sub-field (excl. salt, length, padding)

Throws:

RadiusPacketException - error while decoding attribute data

xor16

protected static byte[] xor16(byte[] src1,
 int src1offset,
 byte[] src2)

md5

protected byte[] md5(byte[] a,
 byte[] b)

pad16x

protected static byte[] pad16x(byte[] val)

Parameters:

val - byte array to pad

Returns:

byte array containing input, padded size multiple of 16