anon.crypto.tinytls.ciphersuites
Class CipherSuite

java.lang.Object
  anon.crypto.tinytls.ciphersuites.CipherSuite

Direct Known Subclasses:

DHE_DSS_WITH_3DES_CBC_SHA, DHE_DSS_WITH_AES_128_CBC_SHA, DHE_DSS_WITH_DES_CBC_SHA, DHE_RSA_WITH_3DES_CBC_SHA, DHE_RSA_WITH_AES_128_CBC_SHA, DHE_RSA_WITH_DES_CBC_SHA

public abstract class CipherSuite
extends java.lang.Object

Author:

stefan A abstract ciphersuite that can used TinyTLS this is the parent class for all ciphersuites

Field Summary

private byte[]	m_ciphersuitecode
protected java.lang.String	m_ciphersuitename
protected byte[]	m_clientmacsecret client write mac secret
protected byte[]	m_clientwriteIV client write IV, only used for block ciphers
protected byte[]	m_clientwritekey client write key
protected org.bouncycastle.crypto.modes.CBCBlockCipher	m_decryptcipher
protected org.bouncycastle.crypto.modes.CBCBlockCipher	m_encryptcipher
private org.bouncycastle.crypto.macs.HMac	m_hmacInput
private org.bouncycastle.crypto.macs.HMac	m_hmacOutput
private Key_Exchange	m_keyexchangealgorithm
private MyRandom	m_Random
protected long	m_readsequenznumber readsequenznumber for packages
private JAPCertificate	m_servercertificate
protected byte[]	m_servermacsecret server write mac secret
protected byte[]	m_serverwriteIV server write IV, only used for block ciphers
protected byte[]	m_serverwritekey server write key
protected long	m_writesequenznumber writesequenznumber for packages

Constructor Summary

CipherSuite(byte[] code)
Constructor for a ciphersuite

Method Summary

byte[]	calculateClientKeyExchange() calculate the client keys (see RFC2246 Client Key Exchange)
protected abstract void	calculateKeys(byte[] keys, boolean forclient) calculate server and client write keys (see RFC2246 TLS Record Protocoll)
void	decode(TLSPlaintextRecord msg) decodes a message with a symmetric key
void	encode(TLSPlaintextRecord msg) encodes a message with a symmetric key
byte[]	getCipherSuiteCode() returns the code of a ciphersuite (see RFC2246)
Key_Exchange	getKeyExchangeAlgorithm() gets the key exchange algorithm that is used
void	processClientKeyExchange(java.math.BigInteger dh_y) processes the client key exchange
void	processServerFinished(TLSPlaintextRecord msg, byte[] handshakemessages) validates the finishedmessage and throws a Exception if a error occure
protected void	setKeyExchangeAlgorithm(Key_Exchange ke) sets the key exchange algorithm
void	setServerCertificate(JAPCertificate cert) set the Server Certificate
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

m_ciphersuitecode

private byte[] m_ciphersuitecode

m_ciphersuitename

protected java.lang.String m_ciphersuitename

m_keyexchangealgorithm

private Key_Exchange m_keyexchangealgorithm

m_servercertificate

private JAPCertificate m_servercertificate

m_decryptcipher

protected org.bouncycastle.crypto.modes.CBCBlockCipher m_decryptcipher

m_encryptcipher

protected org.bouncycastle.crypto.modes.CBCBlockCipher m_encryptcipher

m_hmacInput

private org.bouncycastle.crypto.macs.HMac m_hmacInput

m_hmacOutput

private org.bouncycastle.crypto.macs.HMac m_hmacOutput

m_Random

private MyRandom m_Random

m_writesequenznumber

protected long m_writesequenznumber

writesequenznumber for packages

m_readsequenznumber

protected long m_readsequenznumber

readsequenznumber for packages

m_clientwritekey

protected byte[] m_clientwritekey

client write key

m_clientmacsecret

protected byte[] m_clientmacsecret

client write mac secret

m_clientwriteIV

protected byte[] m_clientwriteIV

client write IV, only used for block ciphers

m_serverwritekey

protected byte[] m_serverwritekey

server write key

m_servermacsecret

protected byte[] m_servermacsecret

server write mac secret

m_serverwriteIV

protected byte[] m_serverwriteIV

server write IV, only used for block ciphers

Constructor Detail

CipherSuite

public CipherSuite(byte[] code)
            throws TLSException

Constructor for a ciphersuite

Parameters:

code - Code of the ciphersuite (see RFC2246)

Throws:

TLSException

Method Detail

setKeyExchangeAlgorithm

protected void setKeyExchangeAlgorithm(Key_Exchange ke)

sets the key exchange algorithm

Parameters:

ke - Key Exchange Algorithm

getKeyExchangeAlgorithm

public Key_Exchange getKeyExchangeAlgorithm()

gets the key exchange algorithm that is used

Returns:

key exchange algorithm

setServerCertificate

public void setServerCertificate(JAPCertificate cert)

set the Server Certificate

Parameters:

cert - server certificate

getCipherSuiteCode

public byte[] getCipherSuiteCode()

returns the code of a ciphersuite (see RFC2246)

Returns:

ciphersuitecode

processClientKeyExchange

public void processClientKeyExchange(java.math.BigInteger dh_y)

processes the client key exchange

Parameters:

dh_y - diffie hellman parameter

calculateClientKeyExchange

public byte[] calculateClientKeyExchange()
                                  throws TLSException

calculate the client keys (see RFC2246 Client Key Exchange)

Returns:

client key exchange message

Throws:

TLSException

processServerFinished

public void processServerFinished(TLSPlaintextRecord msg,
                                  byte[] handshakemessages)
                           throws TLSException

validates the finishedmessage and throws a Exception if a error occure

Parameters:

finishedmessage - the message that have to be valideted

Throws:

TLSException

encode

public void encode(TLSPlaintextRecord msg)

encodes a message with a symmetric key

Parameters:

message - message

decode

public void decode(TLSPlaintextRecord msg)
            throws TLSException

decodes a message with a symmetric key

Parameters:

message - message

Throws:

TLSException

calculateKeys

protected abstract void calculateKeys(byte[] keys,
                                      boolean forclient)

calculate server and client write keys (see RFC2246 TLS Record Protocoll)

Parameters:

keys - array of bytes(see RFC how it is calculated)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object