Package org.h2.security

Class Fog

  • All Implemented Interfaces:
    BlockCipher
    public class Fog
extends java.lang.Object
implements BlockCipher
    A pseudo-encryption algorithm that makes the data appear to be encrypted. This algorithm is cryptographically extremely weak, and should only be used to hide data from reading the plain text using a text editor.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private int key  

    • Constructor Summary

      Constructors 
      Constructor Description
      Fog()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void decrypt​(byte[] bytes, int off, int len)
      Decrypt a number of bytes.
      private void decryptBlock​(byte[] in, byte[] out, int off)  
      void encrypt​(byte[] bytes, int off, int len)
      Encrypt a number of bytes.
      private void encryptBlock​(byte[] in, byte[] out, int off)  
      int getKeyLength()
      Get the length of the key in bytes.
      void setKey​(byte[] key)
      Set the encryption key used for encrypting and decrypting.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • key

        private int key

    • Constructor Detail

      • Fog

        public Fog()

    • Method Detail

      • encrypt

        public void encrypt​(byte[] bytes,
                    int off,
                    int len)
        Description copied from interface: BlockCipher
        Encrypt a number of bytes. This is done in-place, that means the bytes are overwritten.
        Specified by:
        encrypt in interface BlockCipher
        Parameters:
        bytes - the byte array
        off - the start index
        len - the number of bytes to encrypt

      • decrypt

        public void decrypt​(byte[] bytes,
                    int off,
                    int len)
        Description copied from interface: BlockCipher
        Decrypt a number of bytes. This is done in-place, that means the bytes are overwritten.
        Specified by:
        decrypt in interface BlockCipher
        Parameters:
        bytes - the byte array
        off - the start index
        len - the number of bytes to decrypt

      • encryptBlock

        private void encryptBlock​(byte[] in,
                          byte[] out,
                          int off)

      • decryptBlock

        private void decryptBlock​(byte[] in,
                          byte[] out,
                          int off)

      • getKeyLength

        public int getKeyLength()
        Description copied from interface: BlockCipher
        Get the length of the key in bytes.
        Specified by:
        getKeyLength in interface BlockCipher
        Returns:
        the length of the key

      • setKey

        public void setKey​(byte[] key)
        Description copied from interface: BlockCipher
        Set the encryption key used for encrypting and decrypting. The key needs to be 16 bytes long.
        Specified by:
        setKey in interface BlockCipher
        Parameters:
        key - the key