/// <summary>
///
/// </summary>
public static void DecryptFile(AesKey aesKey, string filePath, int bufferLength = BufferLength)
{
if (aesKey == null)
{
throw new ArgumentNullException(nameof(aesKey));
}
var key = aesKey.GetKey();
var iv = aesKey.GetIv();
var keyLength = aesKey.KeySize;
if (!key.Any() || keyLength <= 0)
{
throw new KeyLengthException(Resources.key);
}
if (iv == null)
{
throw new ArgumentNullException(Resources.iv);
}
if (!iv.Any())
{
throw new ByteArrayLengthException(Resources.iv);
}
var readWriter = new SynchronizedReadWriter(filePath);
using (var rif = new RijndaelManaged())
{
rif.Key = key;
rif.IV = iv;
rif.KeySize = keyLength;
rif.BlockSize = aesKey.BlockSize;
rif.Mode = aesKey.Mode;
rif.Padding = aesKey.Padding;
using (var decryptor = rif.CreateDecryptor(key, iv))
{
var bytes = new byte[bufferLength];
while (!readWriter.WriteComplete)
{
readWriter.Read();
using (var ms = new MemoryStream(readWriter.GetBuffer()))
{
if (ms.Length < bytes.Length)
{
bytes = new byte[ms.Length];
}
using (var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
{
cs.Read(bytes, 0, bytes.Length);
}
readWriter.SetBuffer(bytes);
readWriter.Write();
}
}
}
}
}
/// <summary>
///
/// </summary>
public static void DecryptFile(AesKey aesKey, string inputPath, string outputPath, int bufferLength = BufferLength)
{
if (aesKey == null)
{
throw new ArgumentNullException(nameof(aesKey));
}
var key = aesKey.GetKey();
var iv = aesKey.GetIv();
var keyLength = aesKey.KeySize;
if (!key.Any() || keyLength <= 0)
{
throw new KeyLengthException(Resources.key);
}
if (iv == null)
{
throw new ArgumentNullException(Resources.iv);
}
if (!iv.Any())
{
throw new ByteArrayLengthException(Resources.iv);
}
using (var rif = new RijndaelManaged())
{
rif.Key = key;
rif.IV = iv;
rif.KeySize = keyLength;
rif.BlockSize = aesKey.BlockSize;
rif.Mode = aesKey.Mode;
rif.Padding = aesKey.Padding;
using (var decryptor = rif.CreateDecryptor(key, iv))
{
using (var inStream = new FileStream(inputPath, FileMode.Open))
{
using (var csDecrypt = new CryptoStream(inStream, decryptor, CryptoStreamMode.Read))
{
using (var outFile = new FileStream(outputPath, FileMode.CreateNew))
{
var buffer = new byte[bufferLength];
int read;
while ((read = csDecrypt.Read(buffer, 0, buffer.Length)) > 0)
{
outFile.Write(buffer, 0, read);
}
}
}
}
}
}
}