Package org.bouncycastle.crypto.engines

Class CAST6Engine

  • All Implemented Interfaces:
    BlockCipher
    public final class CAST6Engine
extends CAST5Engine
    A class that provides CAST6 key encryption operations, such as encoding data and generating keys. All the algorithms herein are from the Internet RFC RFC2612 - CAST6 (128bit block, 128-256bit key) and implement a simplified cryptography interface.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected int[] _Km  
      protected int[] _Kr  
      protected int[] _Tm  
      protected int[] _Tr  
      protected static int BLOCK_SIZE  
      protected static int ROUNDS  

    • Constructor Summary

      Constructors 
      Constructor Description
      CAST6Engine()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected void CAST_Decipher​(int A, int B, int C, int D, int[] result)
      Does the 12 quad rounds rounds to decrypt the block.
      protected void CAST_Encipher​(int A, int B, int C, int D, int[] result)
      Does the 12 quad rounds rounds to encrypt the block.
      protected int decryptBlock​(byte[] src, int srcIndex, byte[] dst, int dstIndex)
      Decrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.
      protected int encryptBlock​(byte[] src, int srcIndex, byte[] dst, int dstIndex)
      Encrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.
      java.lang.String getAlgorithmName()
      Return the name of the algorithm the cipher implements.
      int getBlockSize()
      Return the block size for this cipher (in bytes).
      void reset()
      Reset the cipher.
      protected void setKey​(byte[] key)  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • _Kr

        protected int[] _Kr

      • _Km

        protected int[] _Km

      • _Tr

        protected int[] _Tr

      • _Tm

        protected int[] _Tm

    • Constructor Detail

      • CAST6Engine

        public CAST6Engine()

    • Method Detail

      • getAlgorithmName

        public java.lang.String getAlgorithmName()
        Description copied from interface: BlockCipher
        Return the name of the algorithm the cipher implements.
        Specified by:
        getAlgorithmName in interface BlockCipher
        Overrides:
        getAlgorithmName in class CAST5Engine
        Returns:
        the name of the algorithm the cipher implements.

      • reset

        public void reset()
        Description copied from interface: BlockCipher
        Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).
        Specified by:
        reset in interface BlockCipher
        Overrides:
        reset in class CAST5Engine

      • getBlockSize

        public int getBlockSize()
        Description copied from interface: BlockCipher
        Return the block size for this cipher (in bytes).
        Specified by:
        getBlockSize in interface BlockCipher
        Overrides:
        getBlockSize in class CAST5Engine
        Returns:
        the block size for this cipher in bytes.

      • setKey

        protected void setKey​(byte[] key)
        Overrides:
        setKey in class CAST5Engine

      • encryptBlock

        protected int encryptBlock​(byte[] src,
                           int srcIndex,
                           byte[] dst,
                           int dstIndex)
        Encrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.
        Overrides:
        encryptBlock in class CAST5Engine
        Parameters:
        src - The plaintext buffer
        srcIndex - An offset into src
        dst - The ciphertext buffer
        dstIndex - An offset into dst

      • decryptBlock

        protected int decryptBlock​(byte[] src,
                           int srcIndex,
                           byte[] dst,
                           int dstIndex)
        Decrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.
        Overrides:
        decryptBlock in class CAST5Engine
        Parameters:
        src - The plaintext buffer
        srcIndex - An offset into src
        dst - The ciphertext buffer
        dstIndex - An offset into dst

      • CAST_Encipher

        protected final void CAST_Encipher​(int A,
                                   int B,
                                   int C,
                                   int D,
                                   int[] result)
        Does the 12 quad rounds rounds to encrypt the block.
        Parameters:
        A - the 00-31 bits of the plaintext block
        B - the 32-63 bits of the plaintext block
        C - the 64-95 bits of the plaintext block
        D - the 96-127 bits of the plaintext block
        result - the resulting ciphertext

      • CAST_Decipher

        protected final void CAST_Decipher​(int A,
                                   int B,
                                   int C,
                                   int D,
                                   int[] result)
        Does the 12 quad rounds rounds to decrypt the block.
        Parameters:
        A - the 00-31 bits of the ciphertext block
        B - the 32-63 bits of the ciphertext block
        C - the 64-95 bits of the ciphertext block
        D - the 96-127 bits of the ciphertext block
        result - the resulting plaintext