de.upb.swtpra05.group03.crypto
Class AliceCrypto

java.lang.Object
  de.upb.swtpra05.group03.crypto.Crypto
      de.upb.swtpra05.group03.crypto.AliceCrypto

Direct Known Subclasses:

CompanyCrypto

public class AliceCrypto

extends Crypto

crypto class used for the 'alice' role known from DiffieHellman example

Version:

$Revision: 1.3 $

Field Summary

private javax.crypto.KeyAgreement	keyAgree object used for the key agreement
private static boolean	SKIP_PARAM_GENERATION use pregenerated modulus and base
private static java.math.BigInteger	skip1024Base The base used with the SKIP 1024 bit modulus
private static java.math.BigInteger	skip1024Modulus The SKIP 1024 bit modulus
private static byte[]	skip1024ModulusBytes The 1024 bit Diffie-Hellman modulus values used by SKIP

Fields inherited from class de.upb.swtpra05.group03.crypto.Crypto

AGREEMENT_ALGORITHM, CIPHER_ALGORITHM, KEY_ALGORITHM, pubKeyFactory, SIGNATURE_ALGORITHM, signer, state, STATE_INIT, STATE_READY, STATE_WAITING, verifyer

Constructor Summary

AliceCrypto()
Constructor

Method Summary

DataSigPair	generatePublicKey() generates a public key for the key agreement
void	generateSecretKey(DataSigPair dsp) generates the secret key by using the others public key for the key agreement

Methods inherited from class de.upb.swtpra05.group03.crypto.Crypto

decryptObject, encryptObject, genPublicKeyFromX509, getSecretKey, isReady, loadSigningKeys, reset, setSecretKey, setSecretKey, sign, verify

Methods inherited from class java.lang.Object

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

Field Detail

SKIP_PARAM_GENERATION

private static final boolean SKIP_PARAM_GENERATION

use pregenerated modulus and base

See Also:

Constant Field Values

keyAgree

private final javax.crypto.KeyAgreement keyAgree

object used for the key agreement

skip1024ModulusBytes

private static final byte[] skip1024ModulusBytes

The 1024 bit Diffie-Hellman modulus values used by SKIP

skip1024Modulus

private static final java.math.BigInteger skip1024Modulus

The SKIP 1024 bit modulus

skip1024Base

private static final java.math.BigInteger skip1024Base

The base used with the SKIP 1024 bit modulus

Constructor Detail

AliceCrypto

public AliceCrypto()
            throws java.security.NoSuchAlgorithmException,
                   javax.crypto.NoSuchPaddingException

Constructor

Throws:

javax.crypto.NoSuchPaddingException

java.security.NoSuchAlgorithmException

Method Detail

generatePublicKey

public DataSigPair generatePublicKey()
                              throws java.security.NoSuchAlgorithmException,
                                     java.security.InvalidAlgorithmParameterException,
                                     java.security.InvalidKeyException,
                                     java.security.SignatureException,
                                     java.security.spec.InvalidParameterSpecException

generates a public key for the key agreement

Returns:

two dim bytearray containing public key and signature

Throws:

java.security.NoSuchAlgorithmException

java.security.InvalidAlgorithmParameterException

java.security.InvalidKeyException

java.security.SignatureException

java.security.spec.InvalidParameterSpecException

generateSecretKey

public void generateSecretKey(DataSigPair dsp)
                       throws java.security.SignatureException,
                              java.security.NoSuchAlgorithmException,
                              java.security.spec.InvalidKeySpecException,
                              java.security.InvalidKeyException,
                              java.lang.IllegalStateException

generates the secret key by using the others public key for the key agreement

Parameters:

dsp - object containing key and signature

Throws:

java.security.SignatureException

java.security.NoSuchAlgorithmException

java.security.spec.InvalidKeySpecException

java.lang.IllegalStateException

java.security.InvalidKeyException