org.trafodion.jdbc.t4

Class Cipher

java.lang.Object

org.trafodion.jdbc.t4.Cipher

public class Cipher
extends Object

Constructor Summary

Constructors

Constructor and Description
Cipher()

Method Summary

Methods

Modifier and Type	Method and Description
int	decrypt(byte[] cipherText, byte[] plainText, Key key, byte[] iv) Decrypts cipherText and stores the plain text in plainText using private key for password decryption or symmetric key for data decryption
int	encrypt(byte[] plainText, byte[] cipherText, Key key) Encrypts plain text and stores the cipher text in cipherText using public key for password encryption.
static byte[]	encryptData(byte[] plainText, SecretKey key, byte[] iv, Cipher cipher) Encrypts the plain text data message using "EAS256/CBC/PKCS7"
static Cipher	getEASInstance(String algorithm)
static Cipher	getInstance()

Methods inherited from class java.lang.Object

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

Constructor Detail

Cipher

public Cipher()

Method Detail

getInstance

public static Cipher getInstance()

Returns:

Cipher

encrypt

public int encrypt(byte[] plainText,
          byte[] cipherText,
          Key key)
            throws SecurityException

Encrypts plain text and stores the cipher text in cipherText using public key for password encryption.

Parameters:

plainText - - plain text to be encrypted

cipherText - - encrypted plain text is returned

key - - password encryption: public key

Throws:

SecurityException

getEASInstance

public static Cipher getEASInstance(String algorithm)
                             throws SecurityException

Throws:

SecurityException

encryptData

public static byte[] encryptData(byte[] plainText,
                 SecretKey key,
                 byte[] iv,
                 Cipher cipher)
                          throws SecurityException

Encrypts the plain text data message using "EAS256/CBC/PKCS7"

Parameters:

plainText - - plain text to be encrypted

key - - session key is used as secret key

iv - - 16 lower bytes of the nonce is used as the initial vector. Can't use the whole 32 bytes nonce because the IV size has to be equal to the block size which is a Java requirement.

Throws:

SecurityException

decrypt

public int decrypt(byte[] cipherText,
          byte[] plainText,
          Key key,
          byte[] iv)
            throws SecurityException

Decrypts cipherText and stores the plain text in plainText using private key for password decryption or symmetric key for data decryption

Parameters:

cipherText - cipher text to be decrypted

plainText - decrypted cipher text is returned

key - password decryption: private key message encryption: session key

iv - 8 sequence nonce is used as the initial vector for symmetric key encryption. Null if is private key encryption

Returns:

the length of the plain text or -1 in case of error

Throws:

SecurityException