public static void StartEncryptDecrypt(string iFileName, string oFileName, UInt64 key, CouplingMode couplingMode, bool isEncrypt = true)
{
codingValue = 0;
_key = key;
_wasEncrypted = 0;
FileStream iFStream = new FileStream(iFileName, FileMode.Open);
using (BinaryReader iFileStream = new BinaryReader(iFStream))
{
var lenght = iFStream.Length; //количество байт
SetMaximum.Invoke(lenght * 3 / 8);
ulong blocks = (ulong)lenght / (ulong)8; //количество unsigned long int (UInt64)
ulong cryptedBlocks = 0;
UInt64 block = 0;
_blocks.Clear();
using (BinaryWriter oFileStream = new BinaryWriter(new FileStream(oFileName, FileMode.Create)))
{
while (blocks > cryptedBlocks)
{
block = iFileStream.ReadUInt64();
_blocks.Add(block);
//Write(block.ToString());
block = 0;
cryptedBlocks++;
codingValue++;
SetValue.Invoke(codingValue);
}
if (isEncrypt)
{
if (lenght % 8 != 0)
{
for (int i = 0; i < lenght % 8; i++)
{
var bt = (byte)iFileStream.ReadByte();
block = block << 8;
block |= bt;
}
block = MakeFullBlock(block, (int)(lenght % 8));
}
else
{
block = 8;
}
_blocks.Add(block);
//Write(block.ToString());
codingValue++;
SetValue.Invoke(codingValue);
}
List <UInt64> newBlocks = new List <ulong>();
switch (SetCouplingMode)
{
case CouplingMode.ECB:
newBlocks = ECB(isEncrypt);
break;
case CouplingMode.CBC:
newBlocks = CBC(isEncrypt);
break;
case CouplingMode.CFB:
newBlocks = CFB(isEncrypt);
break;
case CouplingMode.OFB:
newBlocks = OFB(isEncrypt);
break;
}
for (int i = 0; i < newBlocks.Count; i++)
{
var tmpBlock = newBlocks[i];
if (!isEncrypt && i == newBlocks.Count - 1)
{
var tmp = MakeCuttedBlock(tmpBlock);
if (tmp.Length != 10)
{
foreach (var b in tmp)
{
oFileStream.Write(b);
}
}
}
else
{
oFileStream.Write(tmpBlock);
//Write(tmpBlock.ToString());
}
codingValue++;
SetValue.Invoke(codingValue);
}
EncodeFinished($"Файл\n{iFileName}\nуспешно зашифрован\n\nСоздан файл\n{oFileName}\nс шифротекстом");
}
}
}
public static void StartEncryptDecrypt(string iFileName, string oFileName, UInt64 key, CouplingMode couplingMode, bool isEncrypt = true)
{
_key = key;
_wasEncrypted = 0;
FileStream iFStream = new FileStream(iFileName, FileMode.Open);
using (BinaryReader iFileStream = new BinaryReader(iFStream))
{
var lenght = iFStream.Length;
ulong blocks = (ulong)lenght / (ulong)8;
ulong cryptedBlocks = 0;
UInt64 block = 0;
_blocks.Clear();
using (BinaryWriter oFileStream = new BinaryWriter(new FileStream(oFileName, FileMode.Create)))
{
while (blocks > cryptedBlocks)
{
block = iFileStream.ReadUInt64();
_blocks.Add(block);
Write(block.ToString());
block = 0;
cryptedBlocks++;
}
if (isEncrypt)
{
if (lenght % 8 != 0)
{
for (int i = 0; i < lenght % 8; i++)
{
var bt = (byte)iFileStream.ReadByte();
block = block << 8;
block |= bt;
}
block = MakeFullBlock(block, (int)(lenght % 8));
}
else
{
block = 8;
}
_blocks.Add(block);
Write(block.ToString());
}
List <UInt64> newBlocks = new List <ulong>();
switch (SetCouplingMode)
{
case CouplingMode.ECB:
newBlocks = ECB(isEncrypt);
break;
case CouplingMode.CBC:
newBlocks = CBC(isEncrypt);
break;
case CouplingMode.CFB:
newBlocks = CFB(isEncrypt);
break;
case CouplingMode.OFB:
newBlocks = OFB(isEncrypt);
break;
}
for (int i = 0; i < newBlocks.Count; i++)
{
var tmpBlock = newBlocks[i];
if (!isEncrypt && i == newBlocks.Count - 1)
{
var tmp = MakeCuttedBlock(tmpBlock);
foreach (var b in tmp)
{
oFileStream.Write(b);
}
}
else
{
oFileStream.Write(tmpBlock);
Write(tmpBlock.ToString());
}
}
}
}
}
