Package org.dcache.xrootd.plugins.authn.gsi

Class DHSession

java.lang.Object

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

public class DHSession
extends java.lang.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	Description
DHSession(boolean isServer, int sessionIVLen)	Construct new Diffie-Hellman key exchange session

Method Summary

Modifier and Type	Method	Description
byte[]	decrypt(java.lang.String cipherSpec, java.lang.String keySpec, int blocksize, byte[] encrypted)
byte[]	encrypt(java.lang.String cipherSpec, java.lang.String keySpec, int blocksize, byte[] unencrypted)
void	finaliseKeyAgreement(java.lang.String dhmessage)
java.lang.String	getEncodedDHMaterial()
void	setPaddedKey(boolean paddedKey)
void	setSessionIVLen(int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

DHSession

public DHSession(boolean isServer,
                 int sessionIVLen)
          throws java.security.InvalidAlgorithmParameterException,
                 java.security.NoSuchAlgorithmException,
                 java.security.InvalidKeyException,
                 java.security.NoSuchProviderException

Construct new Diffie-Hellman key exchange session

Throws:

java.security.InvalidAlgorithmParameterException - Invalid DH parameters (primes)

java.security.NoSuchAlgorithmException - DH algorithm not available in VM

java.security.InvalidKeyException - Private key generated by DH generator invalid

java.security.NoSuchProviderException - Bouncy castle provider does not exist

Method Detail

getEncodedDHMaterial

public java.lang.String getEncodedDHMaterial()
                                      throws java.io.IOException

Throws:

java.io.IOException

finaliseKeyAgreement

public void finaliseKeyAgreement(java.lang.String dhmessage)
                          throws java.io.IOException,
                                 java.security.GeneralSecurityException,
                                 java.lang.IllegalStateException

Throws:

java.io.IOException

java.security.GeneralSecurityException

java.lang.IllegalStateException

decrypt

public byte[] decrypt(java.lang.String cipherSpec,
                      java.lang.String keySpec,
                      int blocksize,
                      byte[] encrypted)
               throws java.security.InvalidKeyException,
                      java.lang.IllegalStateException,
                      java.security.NoSuchAlgorithmException,
                      javax.crypto.NoSuchPaddingException,
                      javax.crypto.IllegalBlockSizeException,
                      javax.crypto.BadPaddingException,
                      java.security.InvalidAlgorithmParameterException,
                      java.security.NoSuchProviderException

Throws:

java.security.InvalidKeyException

java.lang.IllegalStateException

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

javax.crypto.IllegalBlockSizeException

javax.crypto.BadPaddingException

java.security.InvalidAlgorithmParameterException

java.security.NoSuchProviderException

setPaddedKey

public void setPaddedKey(boolean paddedKey)

setSessionIVLen

public void setSessionIVLen(int len)

encrypt

public byte[] encrypt(java.lang.String cipherSpec,
                      java.lang.String keySpec,
                      int blocksize,
                      byte[] unencrypted)
               throws java.security.InvalidKeyException,
                      java.lang.IllegalStateException,
                      java.security.NoSuchAlgorithmException,
                      javax.crypto.NoSuchPaddingException,
                      javax.crypto.IllegalBlockSizeException,
                      javax.crypto.BadPaddingException,
                      java.security.InvalidAlgorithmParameterException,
                      java.security.NoSuchProviderException

Throws:

java.security.InvalidKeyException

java.lang.IllegalStateException

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

javax.crypto.IllegalBlockSizeException

javax.crypto.BadPaddingException

java.security.InvalidAlgorithmParameterException

java.security.NoSuchProviderException