SHA3Digest (Bouncy Castle Library 1.52 API Specification)
Date: 2015-03-01

org.bouncycastle.crypto.digests

## Class SHA3Digest

- java.lang.Object
- - org.bouncycastle.crypto.digests.SHA3Digest

- All Implemented Interfaces:
    Digest, ExtendedDigest

      public class SHA3Digest
      extends java.lang.Object
      implements ExtendedDigest

  implementation of SHA-3 based on following KeccakNISTInterface.c from http://keccak.noekeon.org/

  Following the naming conventions used in the C source code to enable easy review of the implementation.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `SHA3Digest()`
    `SHA3Digest(int bitLength)`
    `SHA3Digest(SHA3Digest source)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `doFinal(byte[] out, int outOff)` close the digest, producing the final digest value.
    `java.lang.String` | `getAlgorithmName()` return the algorithm name
    `int` | `getByteLength()` Return the size of block that the compression function is applied to in bytes.
    `int` | `getDigestSize()` return the size, in bytes, of the digest produced by this message digest.
    `void` | `reset()` reset the digest back to it's initial state.
    `void` | `update(byte in)` update the message digest with a single byte.
    `void` | `update(byte[] in, int inOff, int len)` update the message digest with a block of bytes.

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

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

- - ### Constructor Detail

    - #### SHA3Digest

          public SHA3Digest()

    - #### SHA3Digest

          public SHA3Digest(int bitLength)

    - #### SHA3Digest

          public SHA3Digest(SHA3Digest source)

  - ### Method Detail

    - #### getAlgorithmName

          public java.lang.String getAlgorithmName()

      Description copied from interface: `Digest`
      return the algorithm name
      Specified by:
        `getAlgorithmName` in interface `Digest`
      Returns:
        the algorithm name

    - #### getDigestSize

          public int getDigestSize()

      Description copied from interface: `Digest`
      return the size, in bytes, of the digest produced by this message digest.
      Specified by:
        `getDigestSize` in interface `Digest`
      Returns:
        the size, in bytes, of the digest produced by this message digest.

    - #### update

          public void update(byte in)

      Description copied from interface: `Digest`
      update the message digest with a single byte.
      Specified by:
        `update` in interface `Digest`
      Parameters:
        `in` - the input byte to be entered.

    - #### update

          public void update(byte[] in,
                    int inOff,
                    int len)

      Description copied from interface: `Digest`
      update the message digest with a block of bytes.
      Specified by:
        `update` in interface `Digest`
      Parameters:
        `in` - the byte array containing the data.
        `inOff` - the offset into the byte array where the data starts.
        `len` - the length of the data.

    - #### doFinal

          public int doFinal(byte[] out,
                    int outOff)

      Description copied from interface: `Digest`
      close the digest, producing the final digest value. The doFinal call leaves the digest reset.
      Specified by:
        `doFinal` in interface `Digest`
      Parameters:
        `out` - the array the digest is to be copied into.
        `outOff` - the offset into the out array the digest is to start at.

    - #### reset

          public void reset()

      Description copied from interface: `Digest`
      reset the digest back to it's initial state.
      Specified by:
        `reset` in interface `Digest`

    - #### getByteLength

          public int getByteLength()

      Return the size of block that the compression function is applied to in bytes.
      Specified by:
        `getByteLength` in interface `ExtendedDigest`
      Returns:
        internal byte length of a block.