public byte[] GetTTH(string Filename)
{
byte[] TTH = null;
try
{
if (!File.Exists(Filename))
{
System.Diagnostics.Debug.WriteLine("file doesn't exists " + Filename);
return(null);
}
//open the file.
FilePtr = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//if the file is 0 byte long.
if (FilePtr.Length == ZERO_BYTE_FILE)
{
Tiger TG = new Tiger();
TTH = TG.ComputeHash(new byte[] { 0 });
}
//the file is smaller then a single leaf.
else if (FilePtr.Length <= Leaf_Size * Block_Size)
{
TTH = CompressSmallBlock();
}
//normal file.
else
{
Leaf_Count = (int)FilePtr.Length / Leaf_Size;
if (FilePtr.Length % Leaf_Size > 0)
{
Leaf_Count++;
}
GetLeafHash(); //get leafs hash from file.
System.Diagnostics.Debug.WriteLine("===> [ Moving to internal hash. ]");
TTH = CompressHashBlock(HashValues, Leaf_Count); //get root TTH from hash array.
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("error while trying to get TTH for file: " +
Filename + ". (" + e.Message + ")");
TTH = null;
}
if (FilePtr != null)
{
FilePtr.Close();
}
return(TTH);
}
public byte[] GetTTH(string Filename)
{
HashHolder Result;
try
{
FilePtr = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//if the file is 0 byte long.
if (FilePtr.Length == ZERO_BYTE_FILE)
{
Tiger TG = new Tiger();
Result.HashValue = TG.ComputeHash(new byte[] { 0 });
}
//if there's only one block in file use SmallFile().
else if (FilePtr.Length <= Block_Size)
{
Result.HashValue = SmallFile();
}
else
{
//get how many leafs are in file.
Leaf_Count = (int)FilePtr.Length / Block_Size;
if (FilePtr.Length % Block_Size > 0)
{
Leaf_Count++;
}
//load blocks of data and get tiger hash for each one.
LoadLeafHash();
//get root hash from blocks hash.
Result = GetRootHash();
}
FilePtr.Close();
return(Result.HashValue);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("error while trying to get TTH for file: " +
Filename + ". (" + e.Message + ")");
if (FilePtr != null)
{
FilePtr.Close();
}
return(null);
}
}
private byte[] SmallFile()
{
Tiger TG = new Tiger();
byte[] Block = new byte[Block_Size];
int BlockSize = FilePtr.Read(Block, 0, 1024);
//gets hash for a single block file.
return(LH(ByteExtract(Block, BlockSize)));
}
private byte[] LeafHash(byte[] Raw_Data) //leaf hash.
{
byte[] Data = new byte[Raw_Data.Length + 1];
Data[0] = 0x00; //leaf hash mark.
Raw_Data.CopyTo(Data, 1);
//gets tiger hash value for leafs blocks.
Tiger TG = new Tiger();
TG.Initialize();
return(TG.ComputeHash(Data));
}
private int Leaf_Count; //number of leafs.
#endregion Fields
#region Methods
public byte[] GetTTH(string Filename)
{
byte[] TTH = null;
try
{
if (!File.Exists(Filename))
{
System.Diagnostics.Debug.WriteLine("file doesn't exists " + Filename);
return null;
}
//open the file.
FilePtr = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//if the file is 0 byte long.
if (FilePtr.Length == ZERO_BYTE_FILE)
{
Tiger TG = new Tiger();
TTH = TG.ComputeHash(new byte[] { 0 });
}
//the file is smaller then a single leaf.
else if (FilePtr.Length <= Leaf_Size * Block_Size)
TTH = CompressSmallBlock();
//normal file.
else
{
Leaf_Count = (int)FilePtr.Length / Leaf_Size;
if (FilePtr.Length % Leaf_Size > 0) Leaf_Count++;
GetLeafHash(); //get leafs hash from file.
System.Diagnostics.Debug.WriteLine("===> [ Moving to internal hash. ]");
TTH = CompressHashBlock(HashValues, Leaf_Count); //get root TTH from hash array.
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("error while trying to get TTH for file: " +
Filename + ". (" + e.Message + ")");
TTH = null;
}
if (FilePtr != null) FilePtr.Close();
return TTH;
}
void ProcessInternalLeaf(int Level, int Index, byte[] LeafA, byte[] LeafB)
{
Tiger TG = new Tiger();
byte[] Data = new byte[LeafA.Length + LeafB.Length + 1];
Data[0] = InternalHash;
Buffer.BlockCopy(LeafA, 0, Data, 1, LeafA.Length);
Buffer.BlockCopy(LeafB, 0, Data, LeafA.Length + 1, LeafA.Length);
TG.Initialize();
TTH[Level][Index] = TG.ComputeHash(Data);
}
public byte[] GetTTH(string Filename)
{
HashHolder Result;
try
{
FilePtr = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//if the file is 0 byte long.
if (FilePtr.Length == ZERO_BYTE_FILE)
{
Tiger TG = new Tiger();
Result.HashValue = TG.ComputeHash(new byte[] { 0 });
}
//if there's only one block in file use SmallFile().
else if (FilePtr.Length <= Block_Size)
Result.HashValue = SmallFile();
else
{
//get how many leafs are in file.
Leaf_Count = (int)FilePtr.Length / Block_Size;
if (FilePtr.Length % Block_Size > 0)
Leaf_Count++;
//load blocks of data and get tiger hash for each one.
LoadLeafHash();
//get root hash from blocks hash.
Result = GetRootHash();
}
FilePtr.Close();
return Result.HashValue;
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("error while trying to get TTH for file: " +
Filename + ". (" + e.Message + ")");
if (FilePtr != null)
FilePtr.Close();
return null;
}
}
private byte[] InternalHash(byte[] LeafA, byte[] LeafB) //internal hash.
{
byte[] Data = new byte[LeafA.Length + LeafB.Length + 1];
Data[0] = 0x01; //internal hash mark.
//combines two leafs.
LeafA.CopyTo(Data, 1);
LeafB.CopyTo(Data, LeafA.Length + 1);
//gets tiger hash value for combined leaf hash.
Tiger TG = new Tiger();
TG.Initialize();
return(TG.ComputeHash(Data));
}
bool Initialize()
{
if (TTH != null)
{
return(false);
}
if (FilePtr.Length == ZERO_BYTE_FILE)
{
Tiger TG = new Tiger();
LevelCount = 1;
TTH = new byte[1][][];
TTH[0] = new byte[1][];
TTH[0][0] = TG.ComputeHash(new byte[1] {
0
});
return(false);
}
else
{
int i = 1;
LevelCount = 1;
LeafCount = (int)(FilePtr.Length / LeafSize);
if ((FilePtr.Length % LeafSize) > 0)
{
LeafCount++;
}
while (i < LeafCount)
{
i *= 2; LevelCount++;
}
TTH = new byte[LevelCount][][];
TTH[0] = new byte[LeafCount][];
}
return(true);
}
public static bool SelfTest()
{
ASCIIEncoding enc = null;
byte[] hash = null;
int nI = 0;
string TEST_DATA = null;
byte[] TEST_HASH = null;
Tiger tg = null;
int _Vb_t_i4_0 = 0;
byte[] _Vb_t_array_0 = null;
TEST_DATA = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
_Vb_t_array_0 = new byte[] { ((byte)15), ((byte)123), ((byte)249), ((byte)161), ((byte)155), ((byte)156), ((byte)88), ((byte)242), ((byte)183), ((byte)97),
((byte)13), ((byte)247), ((byte)232), ((byte)79), ((byte)10), ((byte)195), ((byte)167), ((byte)28), ((byte)99), ((byte)30),
((byte)123), ((byte)83), ((byte)247), ((byte)142) };
TEST_HASH = _Vb_t_array_0;
tg = new Tiger();
tg.Initialize();
enc = new ASCIIEncoding();
hash = tg.ComputeHash(enc.GetBytes(TEST_DATA));
if (hash.Length != TEST_HASH.Length)
{
return(false);
}
_Vb_t_i4_0 = (TEST_HASH.Length - 1);
for (nI = 0; (nI <= _Vb_t_i4_0); nI++)
{
if (hash[nI] != TEST_HASH[nI])
{
return(false);
}
}
return(true);
}
private byte[] SmallFile()
{
Tiger TG = new Tiger();
byte[] Block = new byte[Block_Size];
int BlockSize = FilePtr.Read(Block, 0, 1024);
//gets hash for a single block file.
return LH(ByteExtract(Block, BlockSize));
}
//leaf hash.
private byte[] LH(byte[] Raw_Data)
{
byte[] Data = new byte[Raw_Data.Length + 1];
Data[0] = 0x00; //leaf hash mark.
Raw_Data.CopyTo(Data, 1);
//gets tiger hash value for leafs blocks.
Tiger TG = new Tiger();
TG.Initialize();
return TG.ComputeHash(Data);
}
//internal hash.
private byte[] IH(byte[] LeafA, byte[] LeafB)
{
byte[] Data = new byte[LeafA.Length + LeafB.Length + 1];
Data[0] = 0x01; //internal hash mark.
//combines two leafs.
LeafA.CopyTo(Data, 1);
LeafB.CopyTo(Data, LeafA.Length + 1);
//gets tiger hash value for combined leaf hash.
Tiger TG = new Tiger();
TG.Initialize();
return TG.ComputeHash(Data);
}
void ProcessInternalLeaf(int Level, int Index, byte[] LeafA, byte[] LeafB)
{
Tiger TG = new Tiger();
byte[] Data = new byte[LeafA.Length + LeafB.Length + 1];
Data[0] = InternalHash;
Buffer.BlockCopy(LeafA, 0, Data, 1, LeafA.Length);
Buffer.BlockCopy(LeafB, 0, Data, LeafA.Length + 1, LeafA.Length);
TG.Initialize();
TTH[Level][Index] = TG.ComputeHash(Data);
}
bool Initialize()
{
if (TTH != null)
return false;
if (FilePtr.Length == ZERO_BYTE_FILE)
{
Tiger TG = new Tiger();
LevelCount = 1;
TTH = new byte[1][][];
TTH[0] = new byte[1][];
TTH[0][0] = TG.ComputeHash(new byte[1] { 0 });
return false;
}
else
{
int i = 1;
LevelCount = 1;
LeafCount = (int)(FilePtr.Length / LeafSize);
if ((FilePtr.Length % LeafSize) > 0) LeafCount++;
while (i < LeafCount) { i *= 2; LevelCount++; }
TTH = new byte[LevelCount][][];
TTH[0] = new byte[LeafCount][];
}
return true;
}
void StartThreads()
{
for (int i = 0; i < ThreadCount; i++)
{
ThreadsList[i] = new Thread(new ThreadStart(ProcessLeafs));
ThreadsList[i].Priority = threadPriority;
ThreadsList[i].IsBackground = true;
ThreadsList[i].Name = i.ToString();
#if !COMPACT_FRAMEWORK
ThreadsList[i].Start();
#else
ThreadsList[i].Start(true);
#endif
}
bool ThreadsAreWorking = false;
do
{
// FLOW84 : START
//Thread.Sleep(1000);
Thread.Sleep(100);
// FLOW84 : END
ThreadsAreWorking = false;
for (int i = 0; i < ThreadCount; i++)
#if !COMPACT_FRAMEWORK
{ if (ThreadsList[i].IsAlive)
#else
{ if (ThreadsList[i].IsAlive())
#endif
{ ThreadsAreWorking = true; } }
} while (ThreadsAreWorking);
}
void StopThreads()
{
for (int i = 0; i < ThreadCount; i++)
#if !COMPACT_FRAMEWORK
{ if (ThreadsList[i] != null && ThreadsList[i].IsAlive)
#else
if (ThreadsList[i] != null && ThreadsList[i].IsAlive())
#endif
{ ThreadsList[i].Abort(); } }
}
void ProcessLeafs()
{
try
{
FileStream ThreadFilePtr = new FileStream(Filename, FileMode.Open, FileAccess.Read);
FileBlock ThreadFileBlock = FileParts[System.Convert.ToInt16(Thread.CurrentThread.Name)];
Tiger TG = new Tiger();
byte[] DataBlock;
byte[] Data = new byte[LeafSize + 1];
long LeafIndex;
int BlockLeafs;
int i;
ThreadFilePtr.Position = ThreadFileBlock.Start;
while (ThreadFilePtr.Position < ThreadFileBlock.End)
{
LeafIndex = (long)ThreadFilePtr.Position / 1024;
if (ThreadFileBlock.End - ThreadFilePtr.Position < DataBlockSize)
{
DataBlock = new byte[ThreadFileBlock.End - ThreadFilePtr.Position];
}
else
{
DataBlock = new byte[DataBlockSize];
}
ThreadFilePtr.Read(DataBlock, 0, DataBlock.Length); //read block
BlockLeafs = DataBlock.Length / 1024;
for (i = 0; i < BlockLeafs; i++)
{
Buffer.BlockCopy(DataBlock, i * LeafSize, Data, 1, LeafSize);
TG.Initialize();
TTH[0][LeafIndex++] = TG.ComputeHash(Data);
}
if (i * LeafSize < DataBlock.Length)
{
Data = new byte[DataBlock.Length - BlockLeafs * LeafSize + 1];
Data[0] = LeafHash;
Buffer.BlockCopy(DataBlock, BlockLeafs * LeafSize, Data, 1, (Data.Length - 1));
TG.Initialize();
TTH[0][LeafIndex++] = TG.ComputeHash(Data);
Data = new byte[LeafSize + 1];
Data[0] = LeafHash;
}
}
DataBlock = null;
Data = null;
}
catch (ThreadAbortException) { }
finally
{
// We remove the object to indicate that we are finished
#if COMPACT_FRAMEWORK
Thread.CurrentThread.GetData();
#endif
}
}
void CompressTree()
{
int InternalLeafCount;
int Level = 0, i, LeafIndex;
while (Level + 1 < LevelCount)
{
LeafIndex = 0;
InternalLeafCount = (LeafCount / 2) + (LeafCount % 2);
TTH[Level + 1] = new byte[InternalLeafCount][];
for (i = 1; i < LeafCount; i += 2)
ProcessInternalLeaf(Level + 1, LeafIndex++, TTH[Level][i - 1], TTH[Level][i]); }
if (LeafIndex < InternalLeafCount)
{
TTH[Level + 1][LeafIndex] = TTH[Level][LeafCount - 1];
}
Level++;
LeafCount = InternalLeafCount;
}
}
void ProcessLeafs()
{
try
{
FileStream ThreadFilePtr = new FileStream(Filename, FileMode.Open, FileAccess.Read);
FileBlock ThreadFileBlock = FileParts[System.Convert.ToInt16(Thread.CurrentThread.Name)];
Tiger TG = new Tiger();
byte[] DataBlock;
byte[] Data = new byte[LeafSize + 1];
long LeafIndex;
int BlockLeafs;
int i;
ThreadFilePtr.Position = ThreadFileBlock.Start;
while (ThreadFilePtr.Position < ThreadFileBlock.End)
{
LeafIndex = (long)ThreadFilePtr.Position / 1024;
if (ThreadFileBlock.End - ThreadFilePtr.Position < DataBlockSize)
DataBlock = new byte[ThreadFileBlock.End - ThreadFilePtr.Position];
else
DataBlock = new byte[DataBlockSize];
ThreadFilePtr.Read(DataBlock, 0, DataBlock.Length); //read block
BlockLeafs = DataBlock.Length / 1024;
for (i = 0; i < BlockLeafs; i++)
{
Buffer.BlockCopy(DataBlock, i * LeafSize, Data, 1, LeafSize);
TG.Initialize();
TTH[0][LeafIndex++] = TG.ComputeHash(Data);
}
if (i * LeafSize < DataBlock.Length)
{
Data = new byte[DataBlock.Length - BlockLeafs * LeafSize + 1];
Data[0] = LeafHash;
Buffer.BlockCopy(DataBlock, BlockLeafs * LeafSize, Data, 1, (Data.Length - 1));
TG.Initialize();
TTH[0][LeafIndex++] = TG.ComputeHash(Data);
Data = new byte[LeafSize + 1];
Data[0] = LeafHash;
}
}
DataBlock = null;
Data = null;
}
catch (ThreadAbortException) { }
finally
{
// We remove the object to indicate that we are finished
#if COMPACT_FRAMEWORK
Thread.CurrentThread.GetData();
#endif
}
}
public static bool SelfTest()
{
ASCIIEncoding enc = null;
byte[] hash = null;
int nI = 0;
string TEST_DATA = null;
byte[] TEST_HASH = null;
Tiger tg = null;
int _Vb_t_i4_0 = 0;
byte[] _Vb_t_array_0 = null;
TEST_DATA = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
_Vb_t_array_0 = new byte[] { ((byte) 15), ((byte) 123), ((byte) 249), ((byte) 161), ((byte) 155), ((byte) 156), ((byte) 88), ((byte) 242), ((byte) 183), ((byte) 97),
((byte) 13), ((byte) 247), ((byte) 232), ((byte) 79), ((byte) 10), ((byte) 195), ((byte) 167), ((byte) 28), ((byte) 99), ((byte) 30),
((byte) 123), ((byte) 83), ((byte) 247), ((byte) 142) };
TEST_HASH = _Vb_t_array_0;
tg = new Tiger();
tg.Initialize();
enc = new ASCIIEncoding();
hash = tg.ComputeHash(enc.GetBytes(TEST_DATA));
if (hash.Length != TEST_HASH.Length)
{
return false;
}
_Vb_t_i4_0 = (TEST_HASH.Length - 1);
for (nI = 0; (nI <= _Vb_t_i4_0); nI++)
{
if (hash[nI] != TEST_HASH[nI])
{
return false;
}
}
return true;
}