Package org.bouncycastle.crypto.engines

Class SerpentEngineBase

java.lang.Object
org.bouncycastle.crypto.engines.SerpentEngineBase
All Implemented Interfaces:
BlockCipher
Direct Known Subclasses:
SerpentEngine, TnepresEngine
public abstract class SerpentEngineBase extends Object implements BlockCipher

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected static final int
    BLOCK_SIZE
     
    protected boolean
    encrypting
     
    protected int
    keyBits
     
    protected int[]
    wKey
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected abstract void
    decryptBlock(byte[] input, int inOff, byte[] output, int outOff)
     
    protected abstract void
    encryptBlock(byte[] input, int inOff, byte[] output, int outOff)
     
    String
    getAlgorithmName()
    Return the name of the algorithm the cipher implements.
    int
    getBlockSize()
    Return the block size for this cipher (in bytes).
    protected final void
    ib0(int[] X, int a, int b, int c, int d)
    InvSO - {13, 3,11, 0,10, 6, 5,12, 1,14, 4, 7,15, 9, 8, 2 } - 15 terms.
    protected final void
    ib1(int[] X, int a, int b, int c, int d)
    InvS1 - { 5, 8, 2,14,15, 6,12, 3,11, 4, 7, 9, 1,13,10, 0 } - 14 steps.
    protected final void
    ib2(int[] X, int a, int b, int c, int d)
    InvS2 - {12, 9,15, 4,11,14, 1, 2, 0, 3, 6,13, 5, 8,10, 7 } - 16 steps.
    protected final void
    ib3(int[] X, int a, int b, int c, int d)
    InvS3 - { 0, 9,10, 7,11,14, 6,13, 3, 5,12, 2, 4, 8,15, 1 } - 15 terms
    protected final void
    ib4(int[] X, int a, int b, int c, int d)
    InvS4 - { 5, 0, 8, 3,10, 9, 7,14, 2,12,11, 6, 4,15,13, 1 } - 15 terms.
    protected final void
    ib5(int[] X, int a, int b, int c, int d)
    InvS5 - { 8,15, 2, 9, 4, 1,13,14,11, 6, 5, 3, 7,12,10, 0 } - 16 terms.
    protected final void
    ib6(int[] X, int a, int b, int c, int d)
    InvS6 - {15,10, 1,13, 5, 3, 6, 0, 4, 9,14, 7, 2,12, 8,11 } - 15 terms.
    protected final void
    ib7(int[] X, int a, int b, int c, int d)
    InvS7 - { 3, 0, 6,13, 9,14,15, 8, 5,12,11, 7,10, 1, 4, 2 } - 17 terms.
    void
    init(boolean encrypting, CipherParameters params)
    initialise a Serpent cipher.
    protected final void
    inverseLT(int[] X)
    Apply the inverse of the linear transformation to the register set.
    protected final void
    LT(int[] X)
    Apply the linear transformation to the register set.
    protected abstract int[]
    makeWorkingKey(byte[] key)
     
    final int
    processBlock(byte[] in, int inOff, byte[] out, int outOff)
    Process one block of input from the array in and write it to the out array.
    void
    reset()
    Reset the cipher.
    protected static int
    rotateLeft(int x, int bits)
     
    protected static int
    rotateRight(int x, int bits)
     
    protected final void
    sb0(int[] X, int a, int b, int c, int d)
    S0 - { 3, 8,15, 1,10, 6, 5,11,14,13, 4, 2, 7, 0, 9,12 } - 15 terms.
    protected final void
    sb1(int[] X, int a, int b, int c, int d)
    S1 - {15,12, 2, 7, 9, 0, 5,10, 1,11,14, 8, 6,13, 3, 4 } - 14 terms.
    protected final void
    sb2(int[] X, int a, int b, int c, int d)
    S2 - { 8, 6, 7, 9, 3,12,10,15,13, 1,14, 4, 0,11, 5, 2 } - 16 terms.
    protected final void
    sb3(int[] X, int a, int b, int c, int d)
    S3 - { 0,15,11, 8,12, 9, 6, 3,13, 1, 2, 4,10, 7, 5,14 } - 16 terms.
    protected final void
    sb4(int[] X, int a, int b, int c, int d)
    S4 - { 1,15, 8, 3,12, 0,11, 6, 2, 5, 4,10, 9,14, 7,13 } - 15 terms.
    protected final void
    sb5(int[] X, int a, int b, int c, int d)
    S5 - {15, 5, 2,11, 4,10, 9,12, 0, 3,14, 8,13, 6, 7, 1 } - 16 terms.
    protected final void
    sb6(int[] X, int a, int b, int c, int d)
    S6 - { 7, 2,12, 5, 8, 4, 6,11,14, 9, 1,15,13, 3,10, 0 } - 15 terms.
    protected final void
    sb7(int[] X, int a, int b, int c, int d)
    S7 - { 1,13,15, 0,14, 8, 2,11, 7, 4,12,10, 9, 3, 5, 6 } - 16 terms.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • BLOCK_SIZE

      protected static final int BLOCK_SIZE
      See Also:

    • encrypting

      protected boolean encrypting

    • wKey

      protected int[] wKey

    • keyBits

      protected int keyBits

  • Method Details

    • init

      public void init(boolean encrypting, CipherParameters params)
      initialise a Serpent cipher.
      Specified by:
      init in interface BlockCipher
      Parameters:
      encrypting - whether or not we are for encryption.
      params - the parameters required to set up the cipher.
      Throws:
      IllegalArgumentException - if the params argument is inappropriate.

    • getAlgorithmName

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

    • getBlockSize

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

    • processBlock

      public final int processBlock(byte[] in, int inOff, byte[] out, int outOff)
      Process one block of input from the array in and write it to the out array.
      Specified by:
      processBlock in interface BlockCipher
      Parameters:
      in - the array containing the input data.
      inOff - offset into the in array the data starts at.
      out - the array the output data will be copied into.
      outOff - the offset into the out array the output will start at.
      Returns:
      the number of bytes processed and produced.
      Throws:
      DataLengthException - if there isn't enough data in in, or space in out.
      IllegalStateException - if the cipher isn't initialised.

    • 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

    • rotateLeft

      protected static int rotateLeft(int x, int bits)

    • rotateRight

      protected static int rotateRight(int x, int bits)

    • sb0

      protected final void sb0(int[] X, int a, int b, int c, int d)
      S0 - { 3, 8,15, 1,10, 6, 5,11,14,13, 4, 2, 7, 0, 9,12 } - 15 terms.

    • ib0

      protected final void ib0(int[] X, int a, int b, int c, int d)
      InvSO - {13, 3,11, 0,10, 6, 5,12, 1,14, 4, 7,15, 9, 8, 2 } - 15 terms.

    • sb1

      protected final void sb1(int[] X, int a, int b, int c, int d)
      S1 - {15,12, 2, 7, 9, 0, 5,10, 1,11,14, 8, 6,13, 3, 4 } - 14 terms.

    • ib1

      protected final void ib1(int[] X, int a, int b, int c, int d)
      InvS1 - { 5, 8, 2,14,15, 6,12, 3,11, 4, 7, 9, 1,13,10, 0 } - 14 steps.

    • sb2

      protected final void sb2(int[] X, int a, int b, int c, int d)
      S2 - { 8, 6, 7, 9, 3,12,10,15,13, 1,14, 4, 0,11, 5, 2 } - 16 terms.

    • ib2

      protected final void ib2(int[] X, int a, int b, int c, int d)
      InvS2 - {12, 9,15, 4,11,14, 1, 2, 0, 3, 6,13, 5, 8,10, 7 } - 16 steps.

    • sb3

      protected final void sb3(int[] X, int a, int b, int c, int d)
      S3 - { 0,15,11, 8,12, 9, 6, 3,13, 1, 2, 4,10, 7, 5,14 } - 16 terms.

    • ib3

      protected final void ib3(int[] X, int a, int b, int c, int d)
      InvS3 - { 0, 9,10, 7,11,14, 6,13, 3, 5,12, 2, 4, 8,15, 1 } - 15 terms

    • sb4

      protected final void sb4(int[] X, int a, int b, int c, int d)
      S4 - { 1,15, 8, 3,12, 0,11, 6, 2, 5, 4,10, 9,14, 7,13 } - 15 terms.

    • ib4

      protected final void ib4(int[] X, int a, int b, int c, int d)
      InvS4 - { 5, 0, 8, 3,10, 9, 7,14, 2,12,11, 6, 4,15,13, 1 } - 15 terms.

    • sb5

      protected final void sb5(int[] X, int a, int b, int c, int d)
      S5 - {15, 5, 2,11, 4,10, 9,12, 0, 3,14, 8,13, 6, 7, 1 } - 16 terms.

    • ib5

      protected final void ib5(int[] X, int a, int b, int c, int d)
      InvS5 - { 8,15, 2, 9, 4, 1,13,14,11, 6, 5, 3, 7,12,10, 0 } - 16 terms.

    • sb6

      protected final void sb6(int[] X, int a, int b, int c, int d)
      S6 - { 7, 2,12, 5, 8, 4, 6,11,14, 9, 1,15,13, 3,10, 0 } - 15 terms.

    • ib6

      protected final void ib6(int[] X, int a, int b, int c, int d)
      InvS6 - {15,10, 1,13, 5, 3, 6, 0, 4, 9,14, 7, 2,12, 8,11 } - 15 terms.

    • sb7

      protected final void sb7(int[] X, int a, int b, int c, int d)
      S7 - { 1,13,15, 0,14, 8, 2,11, 7, 4,12,10, 9, 3, 5, 6 } - 16 terms.

    • ib7

      protected final void ib7(int[] X, int a, int b, int c, int d)
      InvS7 - { 3, 0, 6,13, 9,14,15, 8, 5,12,11, 7,10, 1, 4, 2 } - 17 terms.

    • LT

      protected final void LT(int[] X)
      Apply the linear transformation to the register set.

    • inverseLT

      protected final void inverseLT(int[] X)
      Apply the inverse of the linear transformation to the register set.

    • makeWorkingKey

      protected abstract int[] makeWorkingKey(byte[] key)

    • encryptBlock

      protected abstract void encryptBlock(byte[] input, int inOff, byte[] output, int outOff)

    • decryptBlock

      protected abstract void decryptBlock(byte[] input, int inOff, byte[] output, int outOff)