/// <summary>
/// Decrypts a file with the parameters.
/// </summary>
/// <param name="fileName"></param>
/// <param name="outputFileName"></param>
/// <param name="pass"></param>
/// <param name="initial"></param>
/// <param name="rounds"></param>
/// <param name="leftoff"></param>
/// <param name="expansion"></param>
/// <param name="additionalKey"></param>
/// <param name="callback"></param>
/// <param name="adaptor"></param>
public static void Decrypt(string fileName, string outputFileName, string pass, int initial, int rounds, int leftoff, int expansion, string additionalKey, BasylFileEncryption.Callback callback, BasylPseudoAdaptor adaptor)
{
Decrypt(File.OpenRead(fileName), File.OpenWrite(outputFileName), pass, initial, rounds, leftoff, expansion, additionalKey, callback, adaptor);
}
/// <summary>
/// Encrypts a file from the parameters.
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="pass"></param>
/// <param name="initial"></param>
/// <param name="rounds"></param>
/// <param name="leftoff"></param>
/// <param name="expansion"></param>
/// <param name="additionalKey"></param>
/// <param name="callback"></param>
public static void Encrypt(Stream input, Stream output, string pass, int initial, int rounds, int leftoff, int expansion, string additionalKey, BasylFileEncryption.Callback callback)
{
Encrypt(input, output, pass, initial, rounds, leftoff, expansion, additionalKey, callback, null);
}
/// <summary>
/// Encrypts a file from the parameters.
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="pass"></param>
/// <param name="initial"></param>
/// <param name="rounds"></param>
/// <param name="leftoff"></param>
/// <param name="expansion"></param>
/// <param name="additionalKey"></param>
/// <param name="callback"></param>
/// <param name="adaptor"></param>
public static void Encrypt(Stream input, Stream output, string pass, int initial, int rounds, int leftoff, int expansion, string additionalKey, BasylFileEncryption.Callback callback, BasylPseudoAdaptor adaptor)
{
//The SHA guarantees that no two files will have the same key for encryption and decryption.
byte[] sha = SHA256.Create().ComputeHash(input);
input.Position = 0;
BasylKeyGenerator bkg = new BasylKeyGenerator(pass, initial, rounds, leftoff, expansion, additionalKey, sha, adaptor);
//write out the necessary randomized info.
output.Write(sha, 0, 32);
output.Write(bkg.GetSecondRandomizer(), 0, 4);
output.Write(bkg.GetEncryptedKey1Random(), 0, 4);
BESCipher cipher = new BESCipher(bkg);
int speed = MAX_SPEED;
while (speed > MIN_SPEED)
{
//Encrypt Entire File in Chunks
byte[] buffer = new byte[speed];
while (input.Position + speed <= input.Length)
{
input.Read(buffer, 0, speed);
cipher.EncryptRight(ref buffer);
output.Write(buffer, 0, speed);
if (callback != null)
{
callback((double)input.Position / input.Length);
}
}
speed >>= 1;
}
input.Close();
output.Close();
}
/// <summary>
/// Decrypts a file with the parameters.
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="pass"></param>
/// <param name="initial"></param>
/// <param name="rounds"></param>
/// <param name="leftoff"></param>
/// <param name="expansion"></param>
/// <param name="additionalKey"></param>
/// <param name="callback"></param>
public static void Decrypt(Stream input, Stream output, string pass, int initial, int rounds, int leftoff, int expansion, string additionalKey, BasylFileEncryption.Callback callback, BasylPseudoAdaptor adaptor)
{
//read in the necessary randomized info.
byte[] sha = new byte[32];
byte[] f = new byte[4];
byte[] f2 = new byte[4];
input.Read(sha, 0, 32);
input.Read(f2, 0, 4);
input.Read(f, 0, 4);
BasylKeyGenerator bkg = new BasylKeyGenerator(pass, initial, rounds, leftoff, expansion, additionalKey, sha, f, f2, true, adaptor);
BESCipher cipher = new BESCipher(bkg);
int speed = MAX_SPEED;
while (speed > MIN_SPEED)
{
//Encrypt Entire File in Chunks
byte[] buffer = new byte[speed];
while (input.Position + speed <= input.Length)
{
input.Read(buffer, 0, speed);
cipher.EncryptLeft(ref buffer);
output.Write(buffer, 0, speed);
if (callback != null)
{
callback((double)input.Position / input.Length);
}
}
speed >>= 1;
}
input.Close();
output.Close();
}
