/// <summary>
/// Encrypts the specified source stream.
/// </summary>
/// <param name="sourceStream">The source stream.</param>
/// <param name="nodeId"></param>
/// <returns>Encrypted stream</returns>
public Stream Encrypt(Stream sourceStream, string nodeId)
{
var alg = createAlgorithm();
// try custom encryption
var args = new CryptoEventArgs(sourceStream, nodeId, alg);
Owner.DoBeforeEncrypt(args);
// if no custom encryption then do default
if (!args.Done)
{
if (string.IsNullOrEmpty(Owner.Password))
{
sourceStream.CopyTo(args.DestStream);
}
else
{
using (var ms = new MemoryStream())
using (var cryStream = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write))
{
sourceStream.CopyTo(cryStream);
cryStream.Close();
var bytes = ms.ToArray();
args.DestStream.Write(bytes, 0, bytes.Length);
}
}
}
args.DestStream.Seek(0, SeekOrigin.Begin);
Owner.DoAfterEncrypt(args);
return(args.DestStream);
}
/// <summary>
/// Decrypts the specified source stream.
/// </summary>
/// <param name="sourceStream">The source stream.</param>
/// <param name="nodeId"></param>
/// <returns>Decrypted stream</returns>
public Stream Decrypt(Stream sourceStream, string nodeId)
{
var alg = createAlgorithm();
var args = new CryptoEventArgs(sourceStream, nodeId, alg);
// try custom decryption
Owner.DoBeforeDecrypt(args);
// if no custom decryption then do default
if (!args.Done)
{
if (string.IsNullOrEmpty(Owner.Password))
{
sourceStream.CopyTo(args.DestStream);
}
else
{
using (var cryStream = new CryptoStream(sourceStream, alg.CreateDecryptor(), CryptoStreamMode.Read))
{
cryStream.CopyTo(args.DestStream);
sourceStream.Close();
}
}
}
args.DestStream.Seek(0, SeekOrigin.Begin);
Owner.DoAfterDecrypt(args);
return(args.DestStream);
}
/// <summary>
/// Encrypts the specified source stream.
/// </summary>
/// <param name="sourceStream">The source stream.</param>
/// <param name="nodeId"></param>
/// <returns>Encrypted stream</returns>
public Stream Encrypt(Stream sourceStream, string nodeId)
{
var alg = createAlgorithm();
// try custom encryption
var args = new CryptoEventArgs(sourceStream, nodeId, alg);
Owner.DoBeforeEncrypt(args);
// if no custom encryption then do default
if (!args.Done)
{
if (string.IsNullOrEmpty(Owner.Password))
{
sourceStream.CopyTo(args.DestStream);
}
else
{
using (var ms = new MemoryStream())
using (var cryStream = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write))
{
sourceStream.CopyTo(cryStream);
cryStream.Close();
var bytes = ms.ToArray();
args.DestStream.Write(bytes, 0, bytes.Length);
}
}
}
args.DestStream.Seek(0, SeekOrigin.Begin);
Owner.DoAfterEncrypt(args);
return args.DestStream;
}
/// <summary>
/// Decrypts the specified source stream.
/// </summary>
/// <param name="sourceStream">The source stream.</param>
/// <param name="nodeId"></param>
/// <returns>Decrypted stream</returns>
public Stream Decrypt(Stream sourceStream, string nodeId)
{
var alg = createAlgorithm();
var args = new CryptoEventArgs(sourceStream, nodeId, alg);
// try custom decryption
Owner.DoBeforeDecrypt(args);
// if no custom decryption then do default
if (!args.Done)
{
if (string.IsNullOrEmpty(Owner.Password))
{
sourceStream.CopyTo(args.DestStream);
}
else
{
using (var cryStream = new CryptoStream(sourceStream, alg.CreateDecryptor(), CryptoStreamMode.Read))
{
cryStream.CopyTo(args.DestStream);
sourceStream.Close();
}
}
}
args.DestStream.Seek(0, SeekOrigin.Begin);
Owner.DoAfterDecrypt(args);
return args.DestStream;
}
internal void DoBeforeEncrypt(CryptoEventArgs e)
{
var handler = BeforeEncrypt;
if (handler != null) handler(this, e);
}
internal void DoAfterEncrypt(CryptoEventArgs e)
{
var handler = AfterEncrypt;
if (handler != null) handler(this, e);
}
