private void decryption(string encFilename, byte[] userPW_MD5, string PW, string path)
{
try
{
RIPEMD160 myRIPEMD160 = RIPEMD160.Create();
byte[] ivArray = myRIPEMD160.ComputeHash(stringToByteArray(PW));
byte[] inputIV = new byte[MD5_SIZE];
Array.Copy(ivArray, inputIV, MD5_SIZE);
if (checkBox2.Checked)
{
inputIV = stringToByteArray(getCPUID());
}
Crypt crypt = new Crypt(userPW_MD5, inputIV);
FileInfo info = new FileInfo(encFilename);
Maximum = (int)info.Length * 2; // 복호화, 파일 나누기
Progress = Crypt.Progress = 0;
crypt.decrypt(encFilename, tempFileName, MD5_SIZE);
int delimPos = getPostionFileChar(tempFileName, '|');
if (delimPos == -1)
{
MessageBox.Show("INCORRECT FILE FORMAT");
endDecryption();
return;
}
byte[] fInfoByte = new byte[delimPos];
FileStream inputFile = File.OpenRead(tempFileName);
inputFile.Read(fInfoByte, 0, delimPos);
// inputTempFile.Close();
Progress += delimPos;
string fInfoBase64 = ByteArrayToString(fInfoByte);
string fileInfo = Base64Decoding(fInfoBase64);
// FileStream inputFile = File.OpenRead(Filename);
// using (FileStream fsSource = new FileStream(Filename, FileMode.Open, FileAccess.Read))
// {
int filecount = int.Parse(fileInfo.Substring(0, fileInfo.IndexOf("\"")));
string[] filename = new string[filecount];
string[] checksum = new string[filecount];
int[] filesize = new int[filecount];
fileInfo = fileInfo.Remove(0, fileInfo.IndexOf("\"") + 1);
int i = 0;
for (i = 0; i < filecount; i++)
{
filename[i] = fileInfo.Substring(0, fileInfo.IndexOf("\\"));
fileInfo = fileInfo.Remove(0, fileInfo.IndexOf("\\") + 1);
filesize[i] = int.Parse(fileInfo.Substring(0, fileInfo.IndexOf("\\")));
fileInfo = fileInfo.Remove(0, fileInfo.IndexOf("\\") + 1);
checksum[i] = fileInfo.Substring(0, fileInfo.IndexOf("\""));
fileInfo = fileInfo.Remove(0, fileInfo.IndexOf("\"") + 1);
}
if (inputFile.ReadByte() != Convert.ToByte('|'))
{
inputFile.Close();
MessageBox.Show("FILE INFOMATION ERROR");
endDecryption();
return;
}
// inputFile.Seek(getPostionFileChar(tempFileName, '|') + 1, SeekOrigin.Begin);
for (i = 0; i < filecount; i++)
{
int readBytes, readTryBytes, leftBytes;
byte[] readBuffer = new byte[10000];
FileStream outputFile = File.Create(path + "\\" + filename[i]);
leftBytes = filesize[i];
while (leftBytes > 0)
{
readTryBytes = (leftBytes > 10000) ? 10000 : leftBytes;
readBytes = inputFile.Read(readBuffer, 0, readTryBytes);
if (readBytes != readTryBytes)
{
inputFile.Close();
outputFile.Close();
MessageBox.Show("FILE SIZE ERROR");
endDecryption();
return;
}
outputFile.Write(readBuffer, 0, readBytes);
Progress += readBytes;
leftBytes -= readBytes;
}
outputFile.Close();
if (checksum[i] != GetfileMD5(path + "\\" + filename[i]))
{
inputFile.Close();
MessageBox.Show("FILE CRASHED");
endDecryption();
return;
}
}
inputFile.Close();
Progress = Maximum;
endDecryption();
}
catch (Exception e)
{
MessageBox.Show("There is some problem to decrypt \n maybe it using CPU ID Lock");
}
}
private void encrypt(string encFileName, string PW)
{
File.Delete(tempFileName);
FileStream inputFile;
FileStream outputFile = File.Create(tempFileName);
string fInfoBase64 = getFileInfoBase64();
byte[] fInfoBase64Array = stringToByteArray(fInfoBase64);
outputFile.Write(fInfoBase64Array, 0, fInfoBase64Array.Length);
outputFile.WriteByte(Convert.ToByte('|'));
FileInfo info = null;
int readBytes;
byte[] readBuffer = new byte[10000];
Maximum = 0;
for (int filec = 0; filec < listBox2.Items.Count; filec++)
{
info = new FileInfo(listBox2.Items[filec].ToString());
Maximum += (int)info.Length;
}
Maximum *= 2; // 파일 합치기, 암호화
Progress = Crypt.Progress = 0;
for (int filec = 0; filec < listBox2.Items.Count; filec++)
{
inputFile = File.OpenRead(listBox2.Items[filec].ToString());
while (true)
{
readBytes = inputFile.Read(readBuffer, 0, 10000);
if (readBytes <= 0) break;
outputFile.Write(readBuffer, 0, readBytes);
Progress = Progress + readBytes;
/*
info = new FileInfo(listBox2.Items[filec].ToString());
maximum = (int)info.Length;
for (long i = 0; i < info.Length; i++)
{
int toWrite = inputFile.ReadByte();
if (toWrite < 0) break;
outputFile.WriteByte((byte)toWrite);
progress = progress + 1;
}
*/
}
inputFile.Close();
Thread.Sleep(10);
}
outputFile.Close();
FileStream encFile = File.Create(encFileName);
encFile.Write(GetByteMD5(PW), 0, MD5_SIZE);
encFile.Close();
RIPEMD160 myRIPEMD160 = RIPEMD160.Create();
byte[] keyArray = GetByteMD5(PW);
byte[] ivArray = myRIPEMD160.ComputeHash(stringToByteArray(PW));
byte[] inputIV = new byte[MD5_SIZE];
Array.Copy(ivArray, inputIV, MD5_SIZE);
if (checkBox2.Checked)
{
inputIV = stringToByteArray(getCPUID());
}
crypt = new Crypt(keyArray, inputIV);
crypt.encrypt(tempFileName, encFileName);
File.Delete(tempFileName);
Progress = Maximum;
canClose = true;
Progress = Crypt.Progress = 0;
}
