Package io.anyline.nfc.bouncycastle.crypto.digests

Class KeccakDigest

  • All Implemented Interfaces:
    io.anyline.nfc.bouncycastle.crypto.Digest , io.anyline.nfc.bouncycastle.crypto.ExtendedDigest 
    
public class KeccakDigest
 implements ExtendedDigest

    implementation of Keccak based on following KeccakNISTInterface.c from https://keccak.noekeon.org/

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

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

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

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • KeccakDigest

        KeccakDigest()

      • KeccakDigest

        KeccakDigest(int bitLength)

    • Method Detail

      • getDigestSize

         int getDigestSize()

        return the size, in bytes, of the digest produced by this message digest.

        Returns:

        the size, in bytes, of the digest produced by this message digest.

      • update

         void update(byte in)

        update the message digest with a single byte.

        Parameters:
        in - the input byte to be entered.

      • update

         void update(Array<byte> in, int inOff, int len)

        update the message digest with a block of bytes.

        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

         int doFinal(Array<byte> out, int outOff)

        close the digest, producing the final digest value. The doFinal call leaves the digest reset.

        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

         void reset()

        reset the digest back to it's initial state.

      • getByteLength

         int getByteLength()

        Return the size of block that the compression function is applied to in bytes.

        Returns:

        internal byte length of a block.