public override DecryptionArgsContainer GetDecryptionArgsContainer()
{
DecryptionArgsContainer DArgsContainer = new DecryptionArgsContainer();
DArgsContainer.ARC4DecryptArgs = new ARC4DecryptionArgs();
DArgsContainer.ARC4DecryptArgs.Transformer = m_DecryptTransformer;
return DArgsContainer;
}
public override MemoryStream DecryptPacket(PacketStream EncryptedPacket, DecryptionArgsContainer DecryptionArgs)
{
CryptoStream CStream = new CryptoStream(EncryptedPacket, m_DecryptTransformer, CryptoStreamMode.Read);
byte[] DecryptedBuffer = new byte[DecryptionArgs.UnencryptedLength];
CStream.Read(DecryptedBuffer, 0, DecryptedBuffer.Length);
return(new MemoryStream(DecryptedBuffer));
}
public override DecryptionArgsContainer GetDecryptionArgsContainer()
{
DecryptionArgsContainer DArgsContainer = new DecryptionArgsContainer();
DArgsContainer.ARC4DecryptArgs = new ARC4DecryptionArgs();
DArgsContainer.ARC4DecryptArgs.Transformer = m_DecryptTransformer;
return(DArgsContainer);
}
public override MemoryStream DecryptPacket(PacketStream EncryptedPacket, DecryptionArgsContainer DecryptionArgs)
{
CryptoStream CStream = new CryptoStream(EncryptedPacket, m_DecryptTransformer, CryptoStreamMode.Read);
byte[] DecryptedBuffer = new byte[DecryptionArgs.UnencryptedLength];
CStream.Read(DecryptedBuffer, 0, DecryptedBuffer.Length);
return new MemoryStream(DecryptedBuffer);
}
/// <summary>
/// Creates a new DecryptionArgsContainer instance containing this AESEncryptor's NOnce and PrivateKey.
/// </summary>
/// <returns>A new DecryptionArgsContainer.</returns>
public override DecryptionArgsContainer GetDecryptionArgsContainer()
{
DecryptionArgsContainer Container = new DecryptionArgsContainer();
Container.AESDecryptArgs = new AESDecryptionArgs();
Container.AESDecryptArgs.NOnce = m_NOnce;
Container.AESDecryptArgs.PrivateKey = m_PrivateKey;
return(Container);
}
/// <summary>
/// Decrypts the contents of the provided PacketStream instance.
/// </summary>
/// <param name="EncryptedPacket">An encrypted PacketStream instance.</param>
/// <param name="DecryptionArgs">A DecryptionArgsContainer instance.</param>
/// <returns>A MemoryStream instance with the decrypted data.</returns>
public override MemoryStream DecryptPacket(PacketStream EncryptedPacket, DecryptionArgsContainer DecryptionArgs)
{
byte[] EncryptedData = new byte[EncryptedPacket.Length - (int)PacketHeaders.ENCRYPTED];
EncryptedPacket.Read(EncryptedData, 0, EncryptedData.Length);
byte[] DecryptedData = StaticStaticDiffieHellman.Decrypt(m_PrivateKey,
ECDiffieHellmanCngPublicKey.FromByteArray(m_PublicKey, CngKeyBlobFormat.EccPublicBlob),
m_NOnce, EncryptedData);
return(new MemoryStream(DecryptedData));
}
/// <summary>
/// Creates a new DecryptionArgsContainer instance containing this AESEncryptor's NOnce and PrivateKey.
/// </summary>
/// <returns>A new DecryptionArgsContainer.</returns>
public override DecryptionArgsContainer GetDecryptionArgsContainer()
{
DecryptionArgsContainer Container = new DecryptionArgsContainer();
Container.AESDecryptArgs = new AESDecryptionArgs();
Container.AESDecryptArgs.NOnce = m_NOnce;
Container.AESDecryptArgs.PrivateKey = m_PrivateKey;
Container.AESDecryptArgs.Challenge = m_Challenge;
return Container;
}
/// <summary>
/// Decrypts the contents of the provided PacketStream instance.
/// </summary>
/// <param name="EncryptedPacket">An encrypted PacketStream instance.</param>
/// <param name="DecryptionArgs">A DecryptionArgsContainer instance.</param>
/// <returns>A MemoryStream instance with the decrypted data.</returns>
public override MemoryStream DecryptPacket(PacketStream EncryptedPacket, DecryptionArgsContainer DecryptionArgs)
{
try
{
byte[] EncryptedData = new byte[EncryptedPacket.Length - (int)PacketHeaders.ENCRYPTED];
EncryptedPacket.Read(EncryptedData, 0, EncryptedData.Length);
byte[] DecryptedData = StaticStaticDiffieHellman.Decrypt(m_PrivateKey,
ECDiffieHellmanCngPublicKey.FromByteArray(m_PublicKey, CngKeyBlobFormat.EccPublicBlob),
m_NOnce, EncryptedData);
return new MemoryStream(DecryptedData);
}
catch (Exception e)
{
Debug.WriteLine("Exception in DecryptPacket: " + e.ToString());
return null;
}
}
/// <summary> /// Decrypts the data in this PacketStream. /// WARNING: ASSUMES THAT THE 7-BYTE HEADER /// HAS BEEN READ (ID, LENGTH, DECRYPTEDLENGTH)! /// </summary> /// <param name="Key">The client's en/decryptionkey.</param> /// <param name="Service">The client's DESCryptoServiceProvider instance.</param> /// <param name="UnencryptedLength">The packet's unencrypted length (third byte in the header).</param> public abstract MemoryStream DecryptPacket(PacketStream EncryptedPacket, DecryptionArgsContainer DecryptionArgs);
/// <summary> /// Decrypts the data in this PacketStream. /// WARNING: ASSUMES THAT THE 7-BYTE HEADER /// HAS BEEN READ (ID, LENGTH, DECRYPTEDLENGTH)! /// </summary> /// <param name="Key">The client's en/decryptionkey.</param> /// <param name="Service">The client's DESCryptoServiceProvider instance.</param> /// <param name="UnencryptedLength">The packet's unencrypted length (third byte in the header).</param> public abstract MemoryStream DecryptPacket(PacketStream EncryptedPacket, DecryptionArgsContainer DecryptionArgs);
