Package org.h2.security

Class XTEA

java.lang.Object
org.h2.security.XTEA
All Implemented Interfaces:
BlockCipher
public class XTEA extends Object implements BlockCipher
An implementation of the XTEA block cipher algorithm.

This implementation uses 32 rounds. The best attack reported as of 2009 is 36 rounds (Wikipedia).

  • Field Summary

    Fields inherited from interface org.h2.security.BlockCipher

    ALIGN

  • Constructor Summary

    Constructors
    Constructor
    Description
    XTEA()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    decrypt(byte[] bytes, int off, int len)
    Decrypt a number of bytes.
    void
    encrypt(byte[] bytes, int off, int len)
    Encrypt a number of bytes.
    int
    getKeyLength()
    Get the length of the key in bytes.
    void
    setKey(byte[] b)
    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

  • Constructor Details

    • XTEA

      public XTEA()

  • Method Details

    • setKey

      public void setKey(byte[] b)
      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:
      b - the key

    • 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

    • 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