org.dcache.xrootd.plugins.authn.gsi

Class DHSession

java.lang.Object

org.dcache.xrootd.plugins.authn.gsi.DHSession

public class DHSession
extends Object

This class represents a Diffie-Hellman (DH) session. After the DH key agreement has been completed, the resulting session key can be used for (symmetric) encryption/ decryption.

Author:

radicke, tzangerl

Constructor Summary

Constructors

Constructor and Description
DHSession() Construct new Diffie-Hellman key exchange session

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(String cipherSpec, String keySpec, int blocksize, byte[] encrypted)
void	finaliseKeyAgreement(String dhmessage)
String	getEncodedDHMaterial()

Methods inherited from class java.lang.Object

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

Constructor Detail

DHSession

public DHSession()
          throws InvalidAlgorithmParameterException,
                 NoSuchAlgorithmException,
                 InvalidKeyException,
                 NoSuchProviderException

Construct new Diffie-Hellman key exchange session

Throws:

InvalidAlgorithmParameterException - Invalid DH parameters (primes)

NoSuchAlgorithmException - DH algorithm not available in VM

InvalidKeyException - Private key generated by DH generator invalid

NoSuchProviderException - Bouncy castle provider does not exist

Method Detail

getEncodedDHMaterial

public String getEncodedDHMaterial()
                            throws IOException

Throws:

IOException

finaliseKeyAgreement

public void finaliseKeyAgreement(String dhmessage)
                          throws IOException,
                                 GeneralSecurityException,
                                 NoSuchAlgorithmException,
                                 InvalidKeySpecException,
                                 InvalidKeyException,
                                 IllegalStateException

Throws:

IOException

GeneralSecurityException

NoSuchAlgorithmException

InvalidKeySpecException

InvalidKeyException

IllegalStateException

decrypt

public byte[] decrypt(String cipherSpec,
                      String keySpec,
                      int blocksize,
                      byte[] encrypted)
               throws InvalidKeyException,
                      IllegalStateException,
                      NoSuchAlgorithmException,
                      NoSuchPaddingException,
                      IllegalBlockSizeException,
                      BadPaddingException,
                      InvalidAlgorithmParameterException,
                      NoSuchProviderException

Throws:

InvalidKeyException

IllegalStateException

NoSuchAlgorithmException

NoSuchPaddingException

IllegalBlockSizeException

BadPaddingException

InvalidAlgorithmParameterException

NoSuchProviderException