public void DeDES(byte[] input, string opath, string key, int mode)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = Crc64.Compute(ASCIIEncoding.ASCII.GetBytes(key));
des.IV = des.Key;
if (mode == 48)
{
des.Mode = CipherMode.ECB;
}
else if (mode == 49)
{
des.Mode = CipherMode.CBC;
}
else
if (mode == 50)
{
des.Mode = CipherMode.CFB;
}
MemoryStream fsread = new MemoryStream(input);
ICryptoTransform DesDecrypt = des.CreateDecryptor();
CryptoStream Crypto = new CryptoStream(fsread, DesDecrypt, CryptoStreamMode.Read);
string decryptedString = new StreamReader(Crypto, Encoding.GetEncoding(1252)).ReadToEnd();
string trimOutput = decryptedString.Remove(0, 20);
byte[] outputBytes = Encoding.GetEncoding(1252).GetBytes(trimOutput);
File.WriteAllBytes(opath, outputBytes);
}
public void DeBlow(byte[] input, string opath, string key, int mode)
{
SHA256 sha256 = SHA256.Create();
BlowFish blowFish = new BlowFish(sha256.ComputeHash(ASCIIEncoding.ASCII.GetBytes(key)));
blowFish.SetIV(Crc64.Compute(ASCIIEncoding.ASCII.GetBytes(key)));
byte[] decrypted = { };
string cfbDecrypted;
if (mode == 48)
{
decrypted = blowFish.Decrypt_ECB(input);
}
else if (mode == 49)
{
decrypted = blowFish.Decrypt_CBC(input);
}
else
if (mode == 50)
{
decrypted = blowFish.Decrypt_CBC(input);
}
string stringToWrite = Encoding.GetEncoding(1252).GetString(decrypted);
string trimOutput = stringToWrite.Remove(0, 20);
int pos = trimOutput.IndexOf('\0');
if (pos > 0)
{
trimOutput = trimOutput.Substring(0, pos);
}
byte[] outputBytes = Encoding.GetEncoding(1252).GetBytes(trimOutput);
File.WriteAllBytes(opath, outputBytes);
}
public void EnDES()
{
//Prepare File
FileStream fsEncrypted = new FileStream(opath, FileMode.Create, FileAccess.Write);
//Create Cryptor
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
switch (mode)
{
case 0:
DES.Mode = CipherMode.ECB;
break;
case 1:
DES.Mode = CipherMode.CBC;
break;
case 2:
DES.Mode = CipherMode.CFB;
break;
}
DES.Key = Crc64.Compute(ASCIIEncoding.ASCII.GetBytes(key));
DES.IV = DES.Key;
SHA1 sha1 = SHA1.Create();
ICryptoTransform DesEncrypt = DES.CreateEncryptor();
CryptoStream Crypto = new CryptoStream(fsEncrypted, DesEncrypt, CryptoStreamMode.Write);
byte[] ByteArrayinput = File.ReadAllBytes(fpath);
byte[] Hashdata = sha1.ComputeHash(ByteArrayinput);
byte[] Final = new byte[Hashdata.Length + ByteArrayinput.Length];
System.Buffer.BlockCopy(Hashdata, 0, Final, 0, Hashdata.Length);
System.Buffer.BlockCopy(ByteArrayinput, 0, Final, Hashdata.Length, ByteArrayinput.Length);
//string mergeString = Encoding.GetEncoding(1252).GetString(Final);
Crypto.Write(Final, 0, Final.Length);
Crypto.Close();
fsEncrypted.Close();
StreamWriter sw = File.AppendText(this.opath);
sw.Write("D");
sw.Write(this.mode);
sw.Close();
}
public void EnBlowFish()
{
//Read Input file
byte[] arrayinput = File.ReadAllBytes(fpath);
//Hash Plaintext
SHA1 sha1 = SHA1.Create();
byte[] Hashdata = sha1.ComputeHash(arrayinput);
byte[] Final = new byte[Hashdata.Length + arrayinput.Length];
System.Buffer.BlockCopy(Hashdata, 0, Final, 0, Hashdata.Length);
System.Buffer.BlockCopy(arrayinput, 0, Final, Hashdata.Length, arrayinput.Length);
//Hash key
SHA256 sha256 = SHA256.Create();
// aes.Key = sha256.ComputeHash(ASCIIEncoding.ASCII.GetBytes(this.key));
// System.Buffer.BlockCopy(aes.Key, 0, aes.IV, 0, aes.Key.Length / 2);
BlowFish b = new BlowFish(sha256.ComputeHash(ASCIIEncoding.ASCII.GetBytes(this.key)));
b.SetIV(Crc64.Compute(ASCIIEncoding.ASCII.GetBytes(this.key)));
byte[] arrayenc;
if (this.mode == 0)
{
arrayenc = b.Encrypt_ECB(Final);
}
else if (this.mode == 1)
{
arrayenc = b.Encrypt_CBC(Final);
}
else
{
arrayenc = b.Encrypt_CBC(Final);
}
FileStream fOutput = new FileStream(this.opath, FileMode.Create, FileAccess.Write);
fOutput.Write(arrayenc, 0, arrayenc.Length);
fOutput.Close();
StreamWriter sw = File.AppendText(this.opath);
sw.Write("B");
sw.Write(this.mode);
sw.Close();
}
