Package lumis.portal.crypto

Class SymmetricCipher

  • All Implemented Interfaces:
    ICipher, ICipherSpi
    public class SymmetricCipher
extends AbstractCipher
    Generic cipher implementation, based on symmetric ciphers available in the Java Cryptography Architecture (JCA). Also includes a Mac in the encrypted value for integrity check.

    Configuration elements:

    • provider: may be used to specify a JCA provider for the algortithms.
    • algorithm: the symmetric cipher algorithm.
    • mode: the cipher mode.
    • padding: the padding type.
    • keyGenerationSize: the size, in bits, of the keys automatically generated for this cipher.
    • mac: the MAC's algorithm.
    Since:
    5.5.0
    Version:
    $Revision$ $Date$
    See Also:
    javax.crypto

    • Constructor Summary

      Constructors 
      Constructor Description
      SymmetricCipher()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      byte[] decrypt​(byte[] encryptedValue)
      Decrypts an array of bytes.
      byte[] encrypt​(byte[] plainText)
      Encrypts an array of bytes.
      protected javax.crypto.SecretKey generateKey​(int bitLength, java.lang.String algorithm, java.lang.String provider)
      Generates a key.
      protected javax.crypto.Cipher getCipher()
      Returns a new Cipher instance, according to current configurations.
      protected javax.crypto.Mac getMac()
      Returns a new Mac instance, according to current configurations.
      void init​(org.w3c.dom.Node configuration)
      This method is called only once and before any other method are called.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • SymmetricCipher

        public SymmetricCipher()

    • Method Detail

      • init

        public void init​(org.w3c.dom.Node configuration)
          throws PortalException
        Description copied from interface: ICipherSpi
        This method is called only once and before any other method are called. This allows the cipher to initialize itself and read any custom configuration.
        Throws:
        PortalException

      • generateKey

        protected javax.crypto.SecretKey generateKey​(int bitLength,
                                             java.lang.String algorithm,
                                             java.lang.String provider)
                                      throws java.security.GeneralSecurityException
        Generates a key.
        Parameters:
        bitLength - the length of the key, in bits.
        algorithm - the algorithm the key will be used for.
        provider - the provider of the algorithm.
        Returns:
        the key.
        Throws:
        java.security.GeneralSecurityException
        Since:
        5.5.0

      • getCipher

        protected javax.crypto.Cipher getCipher()
                                 throws java.security.GeneralSecurityException
        Returns a new Cipher instance, according to current configurations.
        Returns:
        the cipher.
        Throws:
        java.security.GeneralSecurityException
        Since:
        5.5.0
        See Also:
        Cipher.getInstance(String, String)

      • getMac

        protected javax.crypto.Mac getMac()
                           throws java.security.GeneralSecurityException
        Returns a new Mac instance, according to current configurations.
        Returns:
        the mac.
        Throws:
        java.security.GeneralSecurityException
        Since:
        5.5.0
        See Also:
        Mac.getInstance(String, String)

      • decrypt

        public byte[] decrypt​(byte[] encryptedValue)
               throws InvalidEncryptedValueException
        Description copied from interface: ICipher
        Decrypts an array of bytes.
        Parameters:
        encryptedValue - the encrypted value.
        Returns:
        the value decrypted.
        Throws:
        InvalidEncryptedValueException - if value is incompatible with this cipher (probably was not encrypted by it or is corrupted).

      • encrypt

        public byte[] encrypt​(byte[] plainText)
        Description copied from interface: ICipher
        Encrypts an array of bytes.
        Parameters:
        plainText - the original value.
        Returns:
        the encrypted value.