private static unsafe void BlockMix(uint[] b, uint[] x1, uint[] x2, uint[] y, int r)
{
fixed(uint *bPtr = &b[b.Length - 16], x1Ptr = x1)
{
PointerUtils.MemMove(x1Ptr, bPtr, 16 * sizeof(uint));
}
var bOffset = 0;
var yOffset = 0;
var halfLen = b.Length / 2;
var idx = 2 * r;
fixed(uint *x1Ptr = x1)
{
while (idx > 0)
{
Xor(x1, b, bOffset, x2);
SalsaCore(8, x2, x1);
fixed(uint *yPtr = &y[yOffset])
{
PointerUtils.MemMove(yPtr, x1Ptr, 16 * sizeof(uint));
}
yOffset = halfLen + bOffset - yOffset;
bOffset += 16;
idx--;
}
}
}
public unsafe void ChainingValue(uint *result)
{
var full = new uint[16];
fixed(uint *ptrFull = full)
{
Compress(ptrFull);
PointerUtils.MemMove(&result[0], ptrFull, 8 * sizeof(uint));
}
}
private static unsafe byte[] GetInitialHashLong(byte[] initialHash, byte[] appendix)
{
var result = new byte[ARGON2_PREHASH_SEED_LENGTH];
fixed(byte *initialHashPtr = initialHash, resultPtr = result, appendixPtr = appendix)
{
PointerUtils.MemMove(resultPtr, initialHashPtr, ARGON2_PREHASH_DIGEST_LENGTH);
PointerUtils.MemMove(resultPtr + ARGON2_PREHASH_DIGEST_LENGTH, appendixPtr, 4);
}
return(result);
}
static unsafe Grindahl256()
{
fixed(uint *ptrTable0 = Table0, ptrTable1 = Table1, ptrTable2 = Table2,
ptrTable3 = Table3, ptrMasterTable = MasterTable)
{
PointerUtils.MemMove(ptrTable0, ptrMasterTable, MasterTable.Length * sizeof(uint));
CalcTable(1, ptrTable1);
CalcTable(2, ptrTable2);
CalcTable(3, ptrTable3);
}
}
public override unsafe void TransformBytes(byte[] data, int index, int length)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
Debug.Assert(index >= 0);
Debug.Assert(length >= 0);
Debug.Assert(index + length <= data.Length);
var dataLength = (ulong)length;
fixed(byte *dataPtr = data, bufferPtr = _buffer)
{
var dataPtr2 = dataPtr + index;
var left = _bufferLength;
var fill = (ulong)_buffer.Length - left;
if (left > 0 && dataLength >= fill)
{
PointerUtils.MemMove(dataPtr2, bufferPtr + left, (int)fill);
for (var idx = 0; idx < ParallelismDegree; idx++)
{
_leafHashes[idx].TransformBytes(_buffer, idx * BlockSizeInBytes, BlockSizeInBytes);
}
dataPtr2 += fill;
dataLength -= fill;
left = 0;
}
DoBlake2SParallel(dataPtr2, dataLength);
dataPtr2 += dataLength - dataLength % (ParallelismDegree * BlockSizeInBytes);
dataLength %= ParallelismDegree * BlockSizeInBytes;
if (dataLength > 0)
{
PointerUtils.MemMove(bufferPtr + left, dataPtr2, (int)dataLength);
}
_bufferLength = left + dataLength;
}
}
static unsafe Grindahl512()
{
fixed(ulong *ptrTable0 = Table0, ptrTable1 = Table1, ptrTable2 = Table2,
ptrTable3 = Table3, ptrTable4 = Table4, ptrTable5 = Table5, ptrTable6 = Table6,
ptrTable7 = Table7, ptrMasterTable = MasterTable)
{
PointerUtils.MemMove(ptrTable0, ptrMasterTable, MasterTable.Length * sizeof(ulong));
CalcTable(1, ptrTable1);
CalcTable(2, ptrTable2);
CalcTable(3, ptrTable3);
CalcTable(4, ptrTable4);
CalcTable(5, ptrTable5);
CalcTable(6, ptrTable6);
CalcTable(7, ptrTable7);
}
}
private unsafe void Blake2SParallel(int idx, void *dataPtr, ulong counter)
{
var buffer = new byte[BlockSizeInBytes];
var dataPtr2 = (byte *)dataPtr;
dataPtr2 += idx * BlockSizeInBytes;
fixed(byte *bufferPtr = buffer)
{
while (counter >= ParallelismDegree * BlockSizeInBytes)
{
PointerUtils.MemMove(bufferPtr, dataPtr2, BlockSizeInBytes);
_leafHashes[idx].TransformBytes(buffer, 0, BlockSizeInBytes);
dataPtr2 += (ulong)(ParallelismDegree * BlockSizeInBytes);
counter -= ParallelismDegree * BlockSizeInBytes;
}
}
}
protected override unsafe void TransformBlock(void *data,
int dataLength, int index)
{
uint t = 0;
var temp = new byte[48];
fixed(byte *tempPtr = temp, statePtr = _state)
{
PointerUtils.MemMove(tempPtr, statePtr, dataLength);
PointerUtils.MemMove(tempPtr + dataLength, (byte *)data + index,
dataLength);
for (var i = 0; i < 16; i++)
{
temp[i + 32] = (byte)(_state[i] ^ ((byte *)data)[i + index]);
}
for (var i = 0; i < 18; i++)
{
for (var j = 0; j < 48; j++)
{
temp[j] = (byte)(temp[j] ^ Pi[t]);
t = temp[j];
}
t = (byte)(t + i);
}
PointerUtils.MemMove(statePtr, tempPtr, 16);
t = _checksum[15];
for (var i = 0; i < 16; i++)
{
_checksum[i] = (byte)(_checksum[i] ^ Pi[((byte *)data)[i + index] ^ t]);
t = _checksum[i];
}
ArrayUtils.ZeroFill(temp);
}
}
public unsafe void Read(byte[] dest, ulong destOffset, ulong outputLength)
{
var words = new uint[16];
if (Offset == MaxDigestLengthInBytes)
{
throw new ArgumentException(MaximumOutputLengthExceeded);
}
var remainder = MaxDigestLengthInBytes - Offset;
outputLength = Math.Min(outputLength, remainder);
fixed(uint *wordsPtr = words)
{
fixed(byte *blockPtr = _block, destPtr = dest)
{
while (outputLength > 0)
{
if ((Offset & (BlockSizeInBytes - 1)) == 0)
{
N.Counter = Offset / BlockSizeInBytes;
N.Compress(wordsPtr);
Converters.le32_copy(wordsPtr, 0, blockPtr, 0, BlockSizeInBytes);
}
var blockOffset = Offset & (BlockSizeInBytes - 1);
var diff = (ulong)_block.Length - blockOffset;
var count = (int)Math.Min(outputLength, diff);
PointerUtils.MemMove(destPtr + destOffset, blockPtr + blockOffset, count);
outputLength -= (ulong)count;
destOffset += (ulong)count;
Offset += (ulong)count;
}
}
}
}
protected override unsafe byte[] GetResult()
{
var buffer = new ulong[HashSize / sizeof(ulong)];
var result = new byte[HashSize];
fixed(ulong *bufferPtr = buffer, millPtr = _mill)
{
fixed(byte *resultPtr = result)
{
for (var i = 0; i < 2; i++)
{
RoundFunction();
PointerUtils.MemMove(bufferPtr + (i * 2), (millPtr + 1), 2 * sizeof(ulong));
}
Converters.le64_copy(bufferPtr, 0, resultPtr, 0,
result.Length);
}
}
return(result);
}
// update incorporates input into the chunkState.
public unsafe void Update(byte *dataPtr, int dataLength)
{
var index = 0;
fixed(byte *blockPtr = _block)
{
fixed(uint *blockPtr2 = _n.Block)
{
fixed(uint *cvPtr = _n.CV)
{
while (dataLength > 0)
{
// If the block buffer is full, compress it and clear it. More
// input is coming, so this compression is not flagChunkEnd.
if (_blockLen == BlockSizeInBytes)
{
// copy the chunk block (bytes) into the node block and chain it.
Converters.le32_copy(blockPtr, 0, blockPtr2, 0,
BlockSizeInBytes);
_n.ChainingValue(cvPtr);
// clear the start flag for all but the first block
_n.Flags &= _n.Flags ^ flagChunkStart;
_blockLen = 0;
}
// Copy input bytes into the chunk block.
var count = Math.Min(BlockSizeInBytes - _blockLen, dataLength);
PointerUtils.MemMove(blockPtr + _blockLen, dataPtr + index, count);
_blockLen += count;
BytesConsumed += count;
index += count;
dataLength -= count;
}
}
}
}
}
public override unsafe byte[] GetBytes(int byteCount)
{
if (byteCount <= MIN_OUTLEN)
{
throw new ArgumentException(
string.Format(InvalidOutputByteCount, MIN_OUTLEN));
}
Initialize(_password, byteCount);
DoFillMemoryBlocks();
Digest(byteCount);
var result = new byte[byteCount];
fixed(byte *digestPtr = _digest, resultPtr = result)
{
PointerUtils.MemMove(resultPtr, digestPtr, byteCount);
}
Reset();
return(result);
}
public override unsafe void TransformBytes(byte[] data, int index, int length)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
Debug.Assert(index >= 0);
Debug.Assert(length >= 0);
Debug.Assert(index + length <= data.Length);
fixed(byte *dataPtr = data, memoryPtr = _state.Memory)
{
var dataPtr2 = dataPtr + index;
_state.TotalLength += (ulong)length;
byte *memoryPtr2;
if (_state.MemorySize + (uint)length < 16)
{
memoryPtr2 = memoryPtr + _state.MemorySize;
PointerUtils.MemMove(memoryPtr2, dataPtr2, length);
_state.MemorySize += (uint)length;
return;
}
var ptrEnd = dataPtr2 + (uint)length;
if (_state.MemorySize > 0)
{
memoryPtr2 = memoryPtr + _state.MemorySize;
PointerUtils.MemMove(memoryPtr2, dataPtr2, (int)(16 - _state.MemorySize));
_state.V1 = PRIME32_1 * Bits.RotateLeft32(
_state.V1 + PRIME32_2 * Converters.ReadBytesAsUInt32LE(memoryPtr, 0),
13);
_state.V2 = PRIME32_1 * Bits.RotateLeft32(
_state.V2 + PRIME32_2 * Converters.ReadBytesAsUInt32LE(memoryPtr, 4),
13);
_state.V3 = PRIME32_1 * Bits.RotateLeft32(
_state.V3 + PRIME32_2 * Converters.ReadBytesAsUInt32LE(memoryPtr, 8),
13);
_state.V4 = PRIME32_1 * Bits.RotateLeft32(
_state.V4 + PRIME32_2 * Converters.ReadBytesAsUInt32LE(memoryPtr, 12),
13);
dataPtr2 += 16 - _state.MemorySize;
_state.MemorySize = 0;
}
if (dataPtr2 <= ptrEnd - 16)
{
var v1 = _state.V1;
var v2 = _state.V2;
var v3 = _state.V3;
var v4 = _state.V4;
var ptrLimit = ptrEnd - 16;
do
{
var dataPtrStart2 = (uint *)dataPtr2;
v1 = PRIME32_1 * Bits.RotateLeft32(
v1 + PRIME32_2 * Converters.ReadPCardinalAsUInt32LE(dataPtrStart2), 13);
v2 = PRIME32_1 * Bits.RotateLeft32(
v2 + PRIME32_2 * Converters.ReadPCardinalAsUInt32LE(dataPtrStart2 + 1), 13);
v3 = PRIME32_1 * Bits.RotateLeft32(
v3 + PRIME32_2 * Converters.ReadPCardinalAsUInt32LE(dataPtrStart2 + 2), 13);
v4 = PRIME32_1 * Bits.RotateLeft32(
v4 + PRIME32_2 * Converters.ReadPCardinalAsUInt32LE(dataPtrStart2 + 3), 13);
dataPtr2 += 16;
} while (dataPtr2 <= ptrLimit);
_state.V1 = v1;
_state.V2 = v2;
_state.V3 = v3;
_state.V4 = v4;
}
if (dataPtr2 >= ptrEnd)
{
return;
}
PointerUtils.MemMove(memoryPtr, dataPtr2, (int)(ptrEnd - dataPtr2));
_state.MemorySize = (uint)(ptrEnd - dataPtr2);
}
}
/// <summary>
/// Returns the pseudo-random bytes for this object.
/// </summary>
/// <param name="byteCount">The number of pseudo-random key bytes to generate.</param>
/// <returns>A byte array filled with pseudo-random key bytes.</returns>
/// <exception cref="ArgumentException">byteCount must be greater than zero.</exception>
/// <exception cref="IndexOutOfRangeException">invalid start index or end index of internal buffer.</exception>
public override unsafe byte[] GetBytes(int byteCount)
{
if (byteCount <= 0)
{
throw new ArgumentException(InvalidByteCount);
}
var key = new byte[byteCount];
var offset = 0;
var size = _endIndex - _startIndex;
if (size > 0)
{
fixed(byte *bufferPtr = &_buffer[_startIndex], keyPtr = key)
{
if (byteCount >= size)
{
PointerUtils.MemMove(keyPtr, bufferPtr, size);
_startIndex = 0;
_endIndex = 0;
offset += size;
}
else
{
PointerUtils.MemMove(keyPtr, bufferPtr, byteCount);
_startIndex += byteCount;
Initialize();
return(key);
}
}
}
if (_startIndex != 0 && _endIndex != 0)
{
throw new IndexOutOfRangeException(InvalidIndex);
}
while (offset < byteCount)
{
var block = Func();
var remainder = byteCount - offset;
if (remainder > _blockSize)
{
fixed(byte *blockPtr = block, keyPtr = &key[offset])
{
PointerUtils.MemMove(keyPtr, blockPtr, _blockSize);
}
offset += _blockSize;
}
else
{
if (remainder > 0)
{
fixed(byte *blockPtr = block, keyPtr = &key[offset])
{
PointerUtils.MemMove(keyPtr, blockPtr, remainder);
}
}
var remCount = _blockSize - remainder;
if (remCount > 0)
{
fixed(byte *blockPtr = &block[remainder], bufferPtr = &_buffer[_startIndex])
{
PointerUtils.MemMove(bufferPtr, blockPtr, remCount);
}
}
_endIndex += remCount;
Initialize();
return(key);
}
}
Initialize();
return(key);
}
private static unsafe byte[] Hash(byte[] input, int outputLength)
{
Blake2B blake2B;
const int blake2BLength = 64;
var result = new byte[outputLength];
var outputLengthBytes = Converters.ReadUInt32AsBytesLE((uint)outputLength);
if (outputLength <= blake2BLength)
{
blake2B = MakeBlake2BInstanceAndInitialize(outputLength);
blake2B.TransformBytes(outputLengthBytes, 0, outputLengthBytes.Length);
blake2B.TransformBytes(input, 0, input.Length);
result = blake2B.TransformFinal().GetBytes();
}
else
{
blake2B = MakeBlake2BInstanceAndInitialize(blake2BLength);
blake2B.TransformBytes(outputLengthBytes, 0, outputLengthBytes.Length);
blake2B.TransformBytes(input, 0, input.Length);
var buffer = blake2B.TransformFinal().GetBytes();
fixed(byte *bufferPtr = buffer, resultPtr = result)
{
PointerUtils.MemMove(resultPtr, bufferPtr, blake2BLength / 2);
}
var count = (outputLength + 31) / 32 - 2;
var position = blake2BLength / 2;
var idx = 2;
while (idx <= count)
{
blake2B.TransformBytes(buffer, 0, buffer.Length);
buffer = blake2B.TransformFinal().GetBytes();
fixed(byte *bufferPtr = buffer, resultPtr = result)
{
PointerUtils.MemMove(resultPtr + position, bufferPtr, blake2BLength / 2);
}
idx++;
position += blake2BLength / 2;
}
var lastLength = outputLength - 32 * count;
blake2B = MakeBlake2BInstanceAndInitialize(lastLength);
blake2B.TransformBytes(buffer, 0, buffer.Length);
buffer = blake2B.TransformFinal().GetBytes();
fixed(byte *bufferPtr = buffer, resultPtr = result)
{
PointerUtils.MemMove(resultPtr + position, bufferPtr, lastLength);
}
}
Debug.Assert(result.Length == outputLength);
return(result);
}
protected override unsafe void TransformBlock(void *data,
int dataLength, int index)
{
var buffer = new ulong[8];
var k = new ulong[8];
var m = new ulong[8];
var temp = new ulong[8];
fixed(ulong *bufferPtr = buffer, kPtr = k, tempPtr = temp, mPtr = m)
{
Converters.be64_copy(data, index, bufferPtr, 0, dataLength);
for (var i = 0; i < 8; i++)
{
k[i] = _state[i];
temp[i] = buffer[i] ^ k[i];
}
for (var round = 1; round < Rounds + 1; round++)
{
for (var i = 0; i < 8; i++)
{
m[i] = 0;
m[i] = m[i] ^ (C0[(byte)(k[(i - 0) & 7] >> 56)]);
m[i] = m[i] ^ (C1[(byte)(k[(i - 1) & 7] >> 48)]);
m[i] = m[i] ^ (C2[(byte)(k[(i - 2) & 7] >> 40)]);
m[i] = m[i] ^ (C3[(byte)(k[(i - 3) & 7] >> 32)]);
m[i] = m[i] ^ (C4[(byte)(k[(i - 4) & 7] >> 24)]);
m[i] = m[i] ^ (C5[(byte)(k[(i - 5) & 7] >> 16)]);
m[i] = m[i] ^ (C6[(byte)(k[(i - 6) & 7] >> 8)]);
m[i] = m[i] ^ (C7[(byte)(k[(i - 7) & 7])]);
}
PointerUtils.MemMove(kPtr, mPtr, m.Length * sizeof(ulong));
k[0] = k[0] ^ Rc[round];
for (var i = 0; i < 8; i++)
{
m[i] = k[i];
m[i] = m[i] ^ (C0[(byte)(temp[(i - 0) & 7] >> 56)]);
m[i] = m[i] ^ (C1[(byte)(temp[(i - 1) & 7] >> 48)]);
m[i] = m[i] ^ (C2[(byte)(temp[(i - 2) & 7] >> 40)]);
m[i] = m[i] ^ (C3[(byte)(temp[(i - 3) & 7] >> 32)]);
m[i] = m[i] ^ (C4[(byte)(temp[(i - 4) & 7] >> 24)]);
m[i] = m[i] ^ (C5[(byte)(temp[(i - 5) & 7] >> 16)]);
m[i] = m[i] ^ (C6[(byte)(temp[(i - 6) & 7] >> 8)]);
m[i] = m[i] ^ (C7[(byte)(temp[(i - 7) & 7])]);
}
PointerUtils.MemMove(tempPtr, mPtr, m.Length * sizeof(ulong));
}
for (var i = 0; i < 8; i++)
{
_state[i] = _state[i] ^ (temp[i] ^ buffer[i]);
}
}
ArrayUtils.ZeroFill(buffer);
}
private static unsafe void SMix(uint[] block, int blockOffset, int cost, int blockSize)
{
var blockCount = blockSize * 32;
var blockX1 = new uint[16];
var blockX2 = new uint[16];
var blockY = new uint[blockCount];
var x = new uint[blockCount];
var v = new uint[cost * blockCount];
try
{
int idx;
fixed(uint *xPtr = x, blockPtr = &block[blockOffset])
{
PointerUtils.MemMove(xPtr, blockPtr, blockCount * sizeof(uint));
var offset = 0;
idx = 0;
while (idx < cost)
{
fixed(uint *vPtr = &v[offset])
{
PointerUtils.MemMove(vPtr, xPtr, blockCount * sizeof(uint));
}
offset += blockCount;
BlockMix(x, blockX1, blockX2, blockY, blockSize);
fixed(uint *vPtr = &v[offset], blockYPtr = blockY)
{
PointerUtils.MemMove(vPtr, blockYPtr, blockCount * sizeof(uint));
}
offset += blockCount;
BlockMix(blockY, blockX1, blockX2, x, blockSize);
idx += 2;
}
}
var mask = (uint)cost - 1;
idx = 0;
while (idx < cost)
{
var jdx = (int)(x[blockCount - 16] & mask);
fixed(uint *vPtr = &v[jdx *blockCount], blockYPtr = blockY)
{
PointerUtils.MemMove(blockYPtr, vPtr, blockCount * sizeof(uint));
}
Xor(blockY, x, 0, blockY);
BlockMix(blockY, blockX1, blockX2, x, blockSize);
idx++;
}
fixed(uint *xPtr = x, bPtr = &block[blockOffset])
{
PointerUtils.MemMove(bPtr, xPtr, blockCount * sizeof(uint));
}
}
finally
{
ClearArray(v);
ClearAllArrays(new[] { x, blockX1, blockX2, blockY });
}
}
