org.bouncycastle.crypto.digests
Class AsconHash256

java.lang.Object
  org.bouncycastle.crypto.digests.BufferBaseDigest
      org.bouncycastle.crypto.digests.AsconBaseDigest
          org.bouncycastle.crypto.digests.AsconHash256

All Implemented Interfaces:

Digest, ExtendedDigest

public class AsconHash256

extends org.bouncycastle.crypto.digests.AsconBaseDigest

Ascon-Hash256 was introduced in NIST Special Publication (SP) 800-232

Additional details and the specification can be found in: NIST SP 800-232 Ascon-Based Lightweight Cryptography Standards for Constrained Devices. For reference source code and implementation details, please see: Reference, highly optimized, masked C and ASM implementations of Ascon (NIST SP 800-232).

Nested Class Summary

static class	AsconBaseDigest.Friend
protected static interface	BufferBaseDigest.ProcessingBuffer
protected static class	BufferBaseDigest.ProcessingBufferType

Field Summary

protected java.lang.String	algorithmName
protected int	ASCON_PB_ROUNDS
protected int	BlockSize
protected int	DigestSize
protected byte[]	m_buf
protected int	m_bufPos
protected BufferBaseDigest.ProcessingBuffer	processor

Constructor Summary

AsconHash256()

Method Summary

int	doFinal(byte[] output, int outOff) close the digest, producing the final digest value.
protected void	ensureSufficientInputBuffer(byte[] input, int inOff, int len)
protected void	ensureSufficientOutputBuffer(byte[] output, int outOff)
protected void	ensureSufficientOutputBuffer(byte[] output, int outOff, int len)
protected void	finish(byte[] output, int outOff)
java.lang.String	getAlgorithmName() return the algorithm name
int	getByteLength() Return the size in bytes of the internal buffer the digest applies it's compression function to.
int	getDigestSize() return the size, in bytes, of the digest produced by this message digest.
protected int	hash(byte[] output, int outOff, int outLen)
protected long	loadBytes(byte[] bytes, int inOff)
protected long	loadBytes(byte[] bytes, int inOff, int n)
protected long	pad(int i)
protected void	padAndAbsorb()
protected void	processBytes(byte[] input, int inOff)
void	reset() reset the digest back to it's initial state.
protected void	setBytes(long w, byte[] bytes, int inOff)
protected void	setBytes(long w, byte[] bytes, int inOff, int n)
protected void	squeeze(byte[] output, int outOff, int len)
void	update(byte in) update the message digest with a single byte.
void	update(byte[] input, 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

Field Detail

ASCON_PB_ROUNDS

protected int ASCON_PB_ROUNDS

DigestSize

protected int DigestSize

BlockSize

protected int BlockSize

m_buf

protected byte[] m_buf

m_bufPos

protected int m_bufPos

algorithmName

protected java.lang.String algorithmName

processor

protected BufferBaseDigest.ProcessingBuffer processor

Constructor Detail

AsconHash256

public AsconHash256()

Method Detail

pad

protected long pad(int i)

loadBytes

protected long loadBytes(byte[] bytes,
                         int inOff)

loadBytes

protected long loadBytes(byte[] bytes,
                         int inOff,
                         int n)

setBytes

protected void setBytes(long w,
                        byte[] bytes,
                        int inOff)

setBytes

protected void setBytes(long w,
                        byte[] bytes,
                        int inOff,
                        int n)

reset

public void reset()

Description copied from interface: Digest

reset the digest back to it's initial state.

processBytes

protected void processBytes(byte[] input,
                            int inOff)

finish

protected void finish(byte[] output,
                      int outOff)

padAndAbsorb

protected void padAndAbsorb()

squeeze

protected void squeeze(byte[] output,
                       int outOff,
                       int len)

hash

protected int hash(byte[] output,
                   int outOff,
                   int outLen)

ensureSufficientOutputBuffer

protected void ensureSufficientOutputBuffer(byte[] output,
                                            int outOff,
                                            int len)

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.

getByteLength

public int getByteLength()

Description copied from interface: ExtendedDigest

Return the size in bytes of the internal buffer the digest applies it's compression function to.

Specified by:

getByteLength in interface ExtendedDigest

Returns:

byte length of the digests internal buffer.

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[] input,
                   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:

input - 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[] output,
                   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:

output - the array the digest is to be copied into.

outOff - the offset into the out array the digest is to start at.

ensureSufficientInputBuffer

protected void ensureSufficientInputBuffer(byte[] input,
                                           int inOff,
                                           int len)

ensureSufficientOutputBuffer

protected void ensureSufficientOutputBuffer(byte[] output,
                                            int outOff)