Package org.bouncycastle.crypto.digests

Class SHAKEDigest

  • All Implemented Interfaces:
    Digest, ExtendedDigest, Xof
    Direct Known Subclasses:
    CSHAKEDigest
    public class SHAKEDigest
extends KeccakDigest
implements Xof
    implementation of SHAKE 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 Detail

      • SHAKEDigest

        public SHAKEDigest()

      • SHAKEDigest

        public SHAKEDigest​(int bitLength)

      • SHAKEDigest

        public SHAKEDigest​(SHAKEDigest source)

    • Method Detail

      • 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
        Overrides:
        doFinal in class KeccakDigest
        Parameters:
        out - the array the digest is to be copied into.
        outOff - the offset into the out array the digest is to start at.

      • doFinal

        public int doFinal​(byte[] out,
                   int outOff,
                   int outLen)
        Description copied from interface: Xof
        Output the results of the final calculation for this digest to outLen number of bytes.
        Specified by:
        doFinal in interface Xof
        Parameters:
        out - output array to write the output bytes to.
        outOff - offset to start writing the bytes at.
        outLen - the number of output bytes requested.
        Returns:
        the number of bytes written

      • doOutput

        public int doOutput​(byte[] out,
                    int outOff,
                    int outLen)
        Description copied from interface: Xof
        Start outputting the results of the final calculation for this digest. Unlike doFinal, this method will continue producing output until the Xof is explicitly reset, or signals otherwise.
        Specified by:
        doOutput in interface Xof
        Parameters:
        out - output array to write the output bytes to.
        outOff - offset to start writing the bytes at.
        outLen - the number of output bytes requested.
        Returns:
        the number of bytes written

      • doFinal

        protected int doFinal​(byte[] out,
                      int outOff,
                      byte partialByte,
                      int partialBits)
        Overrides:
        doFinal in class KeccakDigest

      • doFinal

        protected int doFinal​(byte[] out,
                      int outOff,
                      int outLen,
                      byte partialByte,
                      int partialBits)