/// <summary>
/// Initializes a new instance of the StackableEncryptor, with a single <see cref="IEncryptorConfiguration"/>.
/// </summary>
/// <param name="encryptorConfiguration">The <see cref="IEncryptorConfiguration"/> to implement during encryption and decryption.</param>
public StackableEncryptor(IEncryptorConfiguration encryptorConfiguration)
: this()
{
if (encryptorConfiguration == null)
{
throw new ArgumentNullException("encryptorConfiguration");
}
_EncryptorConfigurations = new List <IEncryptorConfiguration> {
encryptorConfiguration
};
}
/// <summary>
/// Will decrypt the <paramref name="source"/> byte array using the given <paramref name="encryptorConfiguration"/>.
/// </summary>
/// <param name="source">The byte array to decrypt.</param>
/// <param name="encryptorConfiguration">The encryption configuration used to decrypt the <paramref name="source"/> byte array.</param>
/// <returns>The <paramref name="source"/> byte array decrypted using the given <paramref name="encryptorConfiguration"/>.</returns>
public static byte[] Decrypt(byte[] source,
IEncryptorConfiguration encryptorConfiguration)
{
// TODO: Fix This. Problem Id= 3333E15BFE8746CEAA1D5664BFFD0E18
// What's happening here is that I'm using the IEncryptorConfiguration.PasswordSaltHash as the PASSWORD for the PasswordDeriveBytes type; that's not right!
// According to Microsoft documentation, it is using SHA1 by default.
// Must Rethink This!
if ((source == null) || (source.Length == 0))
{
return(source);
}
if (encryptorConfiguration == null)
{
return(source);
}
System.Security.Cryptography.PasswordDeriveBytes passwordDerivedBytes = null;
using (var ec = encryptorConfiguration.SymmetricAlgorithm)
{
passwordDerivedBytes = new System.Security.Cryptography.PasswordDeriveBytes(encryptorConfiguration.SaltedPassword.PasswordSaltHash,
encryptorConfiguration.SaltedPassword.Salt);
ec.Key = passwordDerivedBytes.GetBytes(ec.KeySize / 8);
ec.IV = passwordDerivedBytes.GetBytes(ec.BlockSize / 8);
using (var ms = new System.IO.MemoryStream())
{
using (var cs = new System.Security.Cryptography.CryptoStream(ms,
ec.CreateDecryptor(),
System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(source, 0, source.Length);
cs.Close();
return(ms.ToArray());
}
}
}
}