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#Thank you Bouncy Castle.
#Slight code modifications compared to the original C# code.
$source = @"
using System;
using System.Diagnostics;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Crypto.Digests
{
/// <summary>
/// Implementation of Keccak based on following KeccakNISTInterface.c from http://keccak.noekeon.org/
/// </summary>
/// <remarks>
/// Following the naming conventions used in the C source code to enable easy review of the implementation.
/// </remarks>
public class KeccakDigest
{
private static readonly ulong[] KeccakRoundConstants = KeccakInitializeRoundConstants();
private static readonly int[] KeccakRhoOffsets = KeccakInitializeRhoOffsets();
private static ulong[] KeccakInitializeRoundConstants()
{
ulong[] keccakRoundConstants = new ulong[24];
byte LFSRState = 0x01;
for (int i = 0; i < 24; i++)
{
keccakRoundConstants[i] = 0;
for (int j = 0; j < 7; j++)
{
int bitPosition = (1 << j) - 1;
// LFSR86540
bool loBit = (LFSRState & 0x01) != 0;
if (loBit)
{
keccakRoundConstants[i] ^= 1UL << bitPosition;
}
bool hiBit = (LFSRState & 0x80) != 0;
LFSRState <<= 1;
if (hiBit)
{
LFSRState ^= 0x71;
}
}
}
return keccakRoundConstants;
}
private static int[] KeccakInitializeRhoOffsets()
{
int[] keccakRhoOffsets = new int[25];
int x, y, t, newX, newY;
int rhoOffset = 0;
keccakRhoOffsets[(((0) % 5) + 5 * ((0) % 5))] = rhoOffset;
x = 1;
y = 0;
for (t = 1; t < 25; t++)
{
//rhoOffset = ((t + 1) * (t + 2) / 2) % 64;
rhoOffset = (rhoOffset + t) & 63;
keccakRhoOffsets[(((x) % 5) + 5 * ((y) % 5))] = rhoOffset;
newX = (0 * x + 1 * y) % 5;
newY = (2 * x + 3 * y) % 5;
x = newX;
y = newY;
}
return keccakRhoOffsets;
}
protected byte[] state = new byte[(1600 / 8)];
protected byte[] dataQueue = new byte[(1536 / 8)];
protected int rate;
protected int bitsInQueue;
protected int fixedOutputLength;
protected bool squeezing;
protected int bitsAvailableForSqueezing;
protected byte[] chunk;
protected byte[] oneByte;
private void ClearDataQueueSection(int off, int len)
{
for (int i = off; i != off + len; i++)
{
dataQueue[i] = 0;
}
}
public KeccakDigest()
: this(288)
{
}
public KeccakDigest(int bitLength)
{
Init(bitLength);
}
public KeccakDigest(KeccakDigest source)
{
CopyIn(source);
}
private void CopyIn(KeccakDigest source)
{
Array.Copy(source.state, 0, this.state, 0, source.state.Length);
Array.Copy(source.dataQueue, 0, this.dataQueue, 0, source.dataQueue.Length);
this.rate = source.rate;
this.bitsInQueue = source.bitsInQueue;
this.fixedOutputLength = source.fixedOutputLength;
this.squeezing = source.squeezing;
this.bitsAvailableForSqueezing = source.bitsAvailableForSqueezing;
this.chunk = Arrays.Clone(source.chunk);
this.oneByte = Arrays.Clone(source.oneByte);
}
public virtual string AlgorithmName
{
get { return "Keccak-" + fixedOutputLength; }
}
public virtual int GetDigestSize()
{
return fixedOutputLength / 8;
}
public virtual void Update(byte input)
{
oneByte[0] = input;
Absorb(oneByte, 0, 8L);
}
public virtual void BlockUpdate(byte[] input, int inOff, int len)
{
Absorb(input, inOff, len * 8L);
}
public virtual int DoFinal(byte[] output, int outOff)
{
Squeeze(output, outOff, fixedOutputLength);
Reset();
return GetDigestSize();
}
/*
* TODO Possible API change to support partial-byte suffixes.
*/
protected virtual int DoFinal(byte[] output, int outOff, byte partialByte, int partialBits)
{
if (partialBits > 0)
{
oneByte[0] = partialByte;
Absorb(oneByte, 0, partialBits);
}
Squeeze(output, outOff, fixedOutputLength);
Reset();
return GetDigestSize();
}
public virtual void Reset()
{
Init(fixedOutputLength);
}
/**
* Return the size of block that the compression function is applied to in bytes.
*
* @return internal byte length of a block.
*/
public virtual int GetByteLength()
{
return rate / 8;
}
private void Init(int bitLength)
{
switch (bitLength)
{
case 128:
InitSponge(1344, 256);
break;
case 224:
InitSponge(1152, 448);
break;
case 256:
InitSponge(1088, 512);
break;
case 288:
InitSponge(1024, 576);
break;
case 384:
InitSponge(832, 768);
break;
case 512:
InitSponge(576, 1024);
break;
default:
throw new ArgumentException("must be one of 128, 224, 256, 288, 384, or 512.", "bitLength");
}
}
private void InitSponge(int rate, int capacity)
{
if (rate + capacity != 1600)
{
throw new InvalidOperationException("rate + capacity != 1600");
}
if ((rate <= 0) || (rate >= 1600) || ((rate % 64) != 0))
{
throw new InvalidOperationException("invalid rate value");
}
this.rate = rate;
// this is never read, need to check to see why we want to save it
// this.capacity = capacity;
this.fixedOutputLength = 0;
Arrays.Fill(this.state, (byte)0);
Arrays.Fill(this.dataQueue, (byte)0);
this.bitsInQueue = 0;
this.squeezing = false;
this.bitsAvailableForSqueezing = 0;
this.fixedOutputLength = capacity / 2;
this.chunk = new byte[rate / 8];
this.oneByte = new byte[1];
}
private void AbsorbQueue()
{
KeccakAbsorb(state, dataQueue, rate / 8);
bitsInQueue = 0;
}
protected virtual void Absorb(byte[] data, int off, long databitlen)
{
long i, j, wholeBlocks;
if ((bitsInQueue % 8) != 0)
{
throw new InvalidOperationException("attempt to absorb with odd length queue.");
}
if (squeezing)
{
throw new InvalidOperationException("attempt to absorb while squeezing.");
}
i = 0;
while (i < databitlen)
{
if ((bitsInQueue == 0) && (databitlen >= rate) && (i <= (databitlen - rate)))
{
wholeBlocks = (databitlen - i) / rate;
for (j = 0; j < wholeBlocks; j++)
{
Array.Copy(data, (int)(off + (i / 8) + (j * chunk.Length)), chunk, 0, chunk.Length);
KeccakAbsorb(state, chunk, chunk.Length);
}
i += wholeBlocks * rate;
}
else
{
int partialBlock = (int)(databitlen - i);
if (partialBlock + bitsInQueue > rate)
{
partialBlock = rate - bitsInQueue;
}
int partialByte = partialBlock % 8;
partialBlock -= partialByte;
Array.Copy(data, off + (int)(i / 8), dataQueue, bitsInQueue / 8, partialBlock / 8);
bitsInQueue += partialBlock;
i += partialBlock;
if (bitsInQueue == rate)
{
AbsorbQueue();
}
if (partialByte > 0)
{
int mask = (1 << partialByte) - 1;
dataQueue[bitsInQueue / 8] = (byte)(data[off + ((int)(i / 8))] & mask);
bitsInQueue += partialByte;
i += partialByte;
}
}
}
}
private void PadAndSwitchToSqueezingPhase()
{
if (bitsInQueue + 1 == rate)
{
dataQueue[bitsInQueue / 8] |= (byte)(1U << (bitsInQueue % 8));
AbsorbQueue();
ClearDataQueueSection(0, rate / 8);
}
else
{
ClearDataQueueSection((bitsInQueue + 7) / 8, rate / 8 - (bitsInQueue + 7) / 8);
dataQueue[bitsInQueue / 8] |= (byte)(1U << (bitsInQueue % 8));
}
dataQueue[(rate - 1) / 8] |= (byte)(1U << ((rate - 1) % 8));
AbsorbQueue();
if (rate == 1024)
{
KeccakExtract1024bits(state, dataQueue);
bitsAvailableForSqueezing = 1024;
}
else
{
KeccakExtract(state, dataQueue, rate / 64);
bitsAvailableForSqueezing = rate;
}
squeezing = true;
}
protected virtual void Squeeze(byte[] output, int offset, long outputLength)
{
long i;
int partialBlock;
if (!squeezing)
{
PadAndSwitchToSqueezingPhase();
}
if ((outputLength % 8) != 0)
{
throw new InvalidOperationException("outputLength not a multiple of 8");
}
i = 0;
while (i < outputLength)
{
if (bitsAvailableForSqueezing == 0)
{
KeccakPermutation(state);
if (rate == 1024)
{
KeccakExtract1024bits(state, dataQueue);
bitsAvailableForSqueezing = 1024;
}
else
{
KeccakExtract(state, dataQueue, rate / 64);
bitsAvailableForSqueezing = rate;
}
}
partialBlock = bitsAvailableForSqueezing;
if ((long)partialBlock > outputLength - i)
{
partialBlock = (int)(outputLength - i);
}
Array.Copy(dataQueue, (rate - bitsAvailableForSqueezing) / 8, output, offset + (int)(i / 8), partialBlock / 8);
bitsAvailableForSqueezing -= partialBlock;
i += partialBlock;
}
}
private static void FromBytesToWords(ulong[] stateAsWords, byte[] state)
{
for (int i = 0; i < (1600 / 64); i++)
{
stateAsWords[i] = 0;
int index = i * (64 / 8);
for (int j = 0; j < (64 / 8); j++)
{
stateAsWords[i] |= ((ulong)state[index + j] & 0xff) << ((8 * j));
}
}
}
private static void FromWordsToBytes(byte[] state, ulong[] stateAsWords)
{
for (int i = 0; i < (1600 / 64); i++)
{
int index = i * (64 / 8);
for (int j = 0; j < (64 / 8); j++)
{
state[index + j] = (byte)(stateAsWords[i] >> (8 * j));
}
}
}
private void KeccakPermutation(byte[] state)
{
ulong[] longState = new ulong[state.Length / 8];
FromBytesToWords(longState, state);
KeccakPermutationOnWords(longState);
FromWordsToBytes(state, longState);
}
private void KeccakPermutationAfterXor(byte[] state, byte[] data, int dataLengthInBytes)
{
for (int i = 0; i < dataLengthInBytes; i++)
{
state[i] ^= data[i];
}
KeccakPermutation(state);
}
private void KeccakPermutationOnWords(ulong[] state)
{
int i;
for (i = 0; i < 24; i++)
{
Theta(state);
Rho(state);
Pi(state);
Chi(state);
Iota(state, i);
}
}
ulong[] C = new ulong[5];
private void Theta(ulong[] A)
{
for (int x = 0; x < 5; x++)
{
C[x] = 0;
for (int y = 0; y < 5; y++)
{
C[x] ^= A[x + 5 * y];
}
}
for (int x = 0; x < 5; x++)
{
ulong dX = ((((C[(x + 1) % 5]) << 1) ^ ((C[(x + 1) % 5]) >> (64 - 1)))) ^ C[(x + 4) % 5];
for (int y = 0; y < 5; y++)
{
A[x + 5 * y] ^= dX;
}
}
}
private void Rho(ulong[] A)
{
for (int x = 0; x < 5; x++)
{
for (int y = 0; y < 5; y++)
{
int index = x + 5 * y;
A[index] = ((KeccakRhoOffsets[index] != 0) ? (((A[index]) << KeccakRhoOffsets[index]) ^ ((A[index]) >> (64 - KeccakRhoOffsets[index]))) : A[index]);
}
}
}
ulong[] tempA = new ulong[25];
private void Pi(ulong[] A)
{
Array.Copy(A, 0, tempA, 0, tempA.Length);
for (int x = 0; x < 5; x++)
{
for (int y = 0; y < 5; y++)
{
A[y + 5 * ((2 * x + 3 * y) % 5)] = tempA[x + 5 * y];
}
}
}
ulong[] chiC = new ulong[5];
private void Chi(ulong[] A)
{
for (int y = 0; y < 5; y++)
{
for (int x = 0; x < 5; x++)
{
chiC[x] = A[x + 5 * y] ^ ((~A[(((x + 1) % 5) + 5 * y)]) & A[(((x + 2) % 5) + 5 * y)]);
}
for (int x = 0; x < 5; x++)
{
A[x + 5 * y] = chiC[x];
}
}
}
private static void Iota(ulong[] A, int indexRound)
{
A[(((0) % 5) + 5 * ((0) % 5))] ^= KeccakRoundConstants[indexRound];
}
private void KeccakAbsorb(byte[] byteState, byte[] data, int dataInBytes)
{
KeccakPermutationAfterXor(byteState, data, dataInBytes);
}
private void KeccakExtract1024bits(byte[] byteState, byte[] data)
{
Array.Copy(byteState, 0, data, 0, 128);
}
private void KeccakExtract(byte[] byteState, byte[] data, int laneCount)
{
Array.Copy(byteState, 0, data, 0, laneCount * 8);
}
// public virtual IMemoable Copy()
// {
// return new KeccakDigest(this);
// }
// public virtual void Reset(IMemoable other)
// {
// KeccakDigest d = (KeccakDigest)other;
// CopyIn(d);
// }
}
}
namespace Org.BouncyCastle.Crypto.Digests
{
/// <summary>
/// Implementation of SHA-3 based on following KeccakNISTInterface.c from http://keccak.noekeon.org/
/// </summary>
/// <remarks>
/// Following the naming conventions used in the C source code to enable easy review of the implementation.
/// </remarks>
public class Sha3Digest
: KeccakDigest
{
private static int CheckBitLength(int bitLength)
{
switch (bitLength)
{
case 224:
case 256:
case 384:
case 512:
return bitLength;
default:
throw new ArgumentException(bitLength + " not supported for SHA-3", "bitLength");
}
}
public Sha3Digest()
: this(256)
{
}
public Sha3Digest(int bitLength)
: base(CheckBitLength(bitLength))
{
}
public Sha3Digest(Sha3Digest source)
: base(source)
{
}
public override string AlgorithmName
{
get { return "SHA3-" + fixedOutputLength; }
}
public override int DoFinal(byte[] output, int outOff)
{
Absorb(new byte[]{ 0x02 }, 0, 2);
return base.DoFinal(output, outOff);
}
/*
* TODO Possible API change to support partial-byte suffixes.
*/
protected override int DoFinal(byte[] output, int outOff, byte partialByte, int partialBits)
{
if (partialBits < 0 || partialBits > 7)
throw new ArgumentException("must be in the range [0,7]", "partialBits");
int finalInput = (partialByte & ((1 << partialBits) - 1)) | (0x02 << partialBits);
Debug.Assert(finalInput >= 0);
int finalBits = partialBits + 2;
if (finalBits >= 8)
{
oneByte[0] = (byte)finalInput;
Absorb(oneByte, 0, 8);
finalBits -= 8;
finalInput >>= 8;
}
return base.DoFinal(output, outOff, (byte)finalInput, finalBits);
}
}
}
namespace Org.BouncyCastle.Utilities
{
/// <summary> General array utilities.</summary>
public abstract class Arrays
{
public static byte[] Clone(
byte[] data)
{
return data == null ? null : (byte[])data.Clone();
}
public static void Fill(
byte[] buf,
byte b)
{
int i = buf.Length;
while (i > 0)
{
buf[--i] = b;
}
}
}
}
"@
Add-type -TypeDefinition $source -Language CSharp
$plain = "Hello World"
$plainBytes = [System.Text.Encoding]::ASCII.GetBytes($plain)
$sha3 = New-Object Org.BouncyCastle.Crypto.Digests.Sha3Digest(512)
[Byte[]]$digest = (1..$sha3.GetDigestSize()) |% {0}
$sha3.BlockUpdate($plainBytes, 0, $plainBytes.Length)
$sha3.DoFinal($digest, 0) | Out-Null
$hash = ""
$digest |% {$hash += $("{0:X02}" -f $_) }
Write-Host $("[+] Message: {0} " -f $plain)
Write-Host $("[+] Hash: {0} " -f $hash)
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