/// <summary>
/// Decrypts a stream using the supplied password
/// </summary>
/// <param name="password">The password to encrypt with</param>
/// <param name="input">The stream with encrypted data</param>
/// <param name="output">The unencrypted output stream</param>
public static void Decrypt(string password, Stream input, Stream output)
{
int a;
byte[] buffer = new byte[1024 * 4];
SharpAESCrypt c = new SharpAESCrypt(password, input, OperationMode.Decrypt);
while ((a = c.Read(buffer, 0, buffer.Length)) != 0)
output.Write(buffer, 0, a);
}
/// <summary>
/// Encrypts a stream using the supplied password
/// </summary>
/// <param name="password">The password to decrypt with</param>
/// <param name="input">The stream with unencrypted data</param>
/// <param name="output">The encrypted output stream</param>
public static void Encrypt(string password, Stream input, Stream output)
{
int a;
byte[] buffer = new byte[1024 * 4];
SharpAESCrypt c = new SharpAESCrypt(password, output, OperationMode.Encrypt);
while ((a = input.Read(buffer, 0, buffer.Length)) != 0)
c.Write(buffer, 0, a);
c.FlushFinalBlock();
}
/// <summary>
/// For Unit testing: Decrypt a stream using the supplied password with changing (small) buffer sizes
/// </summary>
/// <param name="password">The password to decrypt with</param>
/// <param name="input">The input stream</param>
/// <param name="output">The output stream</param>
private static void UnitStreamDecrypt(string password, Stream input, Stream output, int bufferSizeSelect, int useThreads)
{
var r = new Random();
var partBufs = Math.Min(bufferSizeSelect, 1024);
var buffers = new byte[partBufs][];
for (int bs = 1; bs < partBufs; bs++)
buffers[bs] = new byte[bs];
buffers[0] = new byte[bufferSizeSelect];
int a;
using (input = new NonFulfillingReaderStream(input))
{
var c = new SharpAESCrypt(password, input, OperationMode.Decrypt, true);
c.MaxCryptoThreads = useThreads;
do
{
var bufLen = r.Next(bufferSizeSelect) + 1;
var useBuf = bufLen < partBufs ? buffers[bufLen] : buffers[0];
a = c.Read(useBuf, 0, bufLen);
output.Write(useBuf, 0, a);
} while (a != 0);
}
}
