Package org.bouncycastle.crypto.engines

## Class GOST28147Engine

- java.lang.Object
- - org.bouncycastle.crypto.engines.GOST28147Engine

- All Implemented Interfaces:
    `BlockCipher`

      public class GOST28147Engine
      extends java.lang.Object
      implements BlockCipher

  implementation of GOST 28147-89

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `protected static int` | `BLOCK_SIZE` |

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `GOST28147Engine()` | standard constructor.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `java.lang.String` | `getAlgorithmName()` | Return the name of the algorithm the cipher implements.
    `int` | `getBlockSize()` | Return the block size for this cipher (in bytes).
    `static byte[]` | `getSBox​(java.lang.String sBoxName)` | Return the S-Box associated with SBoxName
    `static java.lang.String` | `getSBoxName​(byte[] sBox)` |
    `void` | `init​(boolean forEncryption, CipherParameters params)` | initialise an GOST28147 cipher.
    `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.

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### BLOCK_SIZE

          protected static final int BLOCK_SIZE

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### GOST28147Engine

          public GOST28147Engine()

      standard constructor.

  - ### Method Detail

    - #### init

          public void init​(boolean forEncryption,
                           CipherParameters params)

      initialise an GOST28147 cipher.
      Specified by:
        `init` in interface `BlockCipher`
      Parameters:
        `forEncryption` - whether or not we are for encryption.
        `params` - the parameters required to set up the cipher.
      Throws:
        `java.lang.IllegalArgumentException` - if the params argument is inappropriate.

    - #### 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`
      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 int processBlock​(byte[] in,
                                  int inOff,
                                  byte[] out,
                                  int outOff)

      Description copied from interface: `BlockCipher`
      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.

    - #### 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`

    - #### getSBox

          public static byte[] getSBox​(java.lang.String sBoxName)

      Return the S-Box associated with SBoxName
      Parameters:
        `sBoxName` - name of the S-Box
      Returns:
        byte array representing the S-Box

    - #### getSBoxName

          public static java.lang.String getSBoxName​(byte[] sBox)