Package org.h2.security

Class AES

  • All Implemented Interfaces:
    BlockCipher
    public class AES
extends java.lang.Object
implements BlockCipher
    An implementation of the AES block cipher algorithm, also known as Rijndael. Only AES-128 is supported by this class.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private int[] decKey  
      private int[] encKey  
      private static int[] FS  
      private static int[] FT0  
      private static int[] FT1  
      private static int[] FT2  
      private static int[] FT3  
      private static int[] RCON  
      private static int[] RS  
      private static int[] RT0  
      private static int[] RT1  
      private static int[] RT2  
      private static int[] RT3  

    • Constructor Summary

      Constructors 
      Constructor Description
      AES()  

    • Method Summary

      All Methods Static 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)  
      private static int getDec​(int t)  
      int getKeyLength()
      Get the length of the key in bytes.
      private static int mul​(int[] pow, int[] log, int x, int y)  
      private static int rot8​(int x)  
      void setKey​(byte[] key)
      Set the encryption key used for encrypting and decrypting.
      private static int xtime​(int x)  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • RCON

        private static final int[] RCON

      • FS

        private static final int[] FS

      • FT0

        private static final int[] FT0

      • FT1

        private static final int[] FT1

      • FT2

        private static final int[] FT2

      • FT3

        private static final int[] FT3

      • RS

        private static final int[] RS

      • RT0

        private static final int[] RT0

      • RT1

        private static final int[] RT1

      • RT2

        private static final int[] RT2

      • RT3

        private static final int[] RT3

      • encKey

        private final int[] encKey

      • decKey

        private final int[] decKey

    • Constructor Detail

      • AES

        public AES()

    • Method Detail

      • rot8

        private static int rot8​(int x)

      • xtime

        private static int xtime​(int x)

      • mul

        private static int mul​(int[] pow,
                       int[] log,
                       int x,
                       int y)

      • getDec

        private static int getDec​(int t)

      • 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

      • 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