org.dcache.xrootd.plugins.authn.gsi

Class RSASession

java.lang.Object

org.dcache.xrootd.plugins.authn.gsi.RSASession

public class RSASession
extends Object

This class is necessitated by the fact that the new GSI protocol requires encryption and decryption of the arbitrarily long Diffie-Hellman encoded parameters. RSA encryption/decryption is not recommended for block-like processing of messages, but this is the way that the SLAC client and server do it, so we are constrained to follow suit.

Field Summary

Fields

Modifier and Type	Field and Description
protected Cipher	cipher
protected static org.slf4j.Logger	LOGGER
protected int	maxDecryptionBlockSize
protected int	maxEncryptionBlockSize

Constructor Summary

Constructors

Constructor and Description
RSASession()

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(byte[] in)
byte[]	encrypt(byte[] in)
void	initializeForDecryption(PublicKey publicKey) Prepare rsaCipher for decryption using received public key.
void	initializeForEncryption(PrivateKey privateKey) Prepare rsaCipher for encryption using local private key.

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

protected static org.slf4j.Logger LOGGER

cipher

protected Cipher cipher

maxDecryptionBlockSize

protected int maxDecryptionBlockSize

maxEncryptionBlockSize

protected int maxEncryptionBlockSize

Constructor Detail

RSASession

public RSASession()

Method Detail

initializeForEncryption

public void initializeForEncryption(PrivateKey privateKey)
                             throws NoSuchPaddingException,
                                    NoSuchAlgorithmException,
                                    NoSuchProviderException,
                                    InvalidKeyException

Prepare rsaCipher for encryption using local private key.

Throws:

NoSuchPaddingException

NoSuchAlgorithmException

NoSuchProviderException

InvalidKeyException

initializeForDecryption

public void initializeForDecryption(PublicKey publicKey)
                             throws NoSuchPaddingException,
                                    NoSuchAlgorithmException,
                                    NoSuchProviderException,
                                    InvalidKeyException

Prepare rsaCipher for decryption using received public key.

Throws:

NoSuchPaddingException

NoSuchAlgorithmException

NoSuchProviderException

InvalidKeyException

encrypt

public byte[] encrypt(byte[] in)
               throws IOException,
                      BadPaddingException,
                      IllegalBlockSizeException

Throws:

IOException

BadPaddingException

IllegalBlockSizeException

decrypt

public byte[] decrypt(byte[] in)
               throws IOException,
                      BadPaddingException,
                      IllegalBlockSizeException

Throws:

IOException

BadPaddingException

IllegalBlockSizeException