/// <summary>
/// Copies certain characteristics of this instance to the <paramref name="cipher"/> parameter.
/// The goal is to produce a cipher with the same encryption/decryption behavior but saving the key encryption and decryption ceremony and overhead if possible.
/// Here it creates a <see cref="SymmetricAlgorithm"/> object identical to the current <see cref="Symmetric"/> and assigns it to <paramref name="cipher"/>'s <see cref="Symmetric"/>.
/// </summary>
/// <param name="cipher">The cipher that gets the identical symmetric algorithm object.</param>
protected virtual void CopyTo(
SymmetricKeyCipherBase cipher)
{
if (cipher == null)
{
throw new ArgumentNullException(nameof(cipher));
}
if (!IsSymmetricKeyInitialized)
{
return;
}
cipher._symmetric = SymmetricAlgorithm.Create(Symmetric.GetType().FullName);
cipher.Symmetric.Mode = Symmetric.Mode;
cipher.Symmetric.Padding = Symmetric.Padding;
cipher.Symmetric.BlockSize = Symmetric.BlockSize;
cipher.Symmetric.FeedbackSize = Symmetric.FeedbackSize;
cipher.Symmetric.KeySize = Symmetric.KeySize;
cipher.Symmetric.Key = (byte[])Symmetric.Key.Clone();
cipher.Symmetric.IV = (byte[])Symmetric.IV.Clone();
cipher.IsSymmetricKeyInitialized = true;
cipher.ShouldEncryptIV = ShouldEncryptIV;
}
public virtual ICipherAsync CloneLightCipher()
{
if (ShouldEncryptIV)
{
throw new InvalidOperationException("This object cannot create light clones because the property " + nameof(ShouldEncryptIV) + " is true.");
}
InitializeSymmetricKey();
var cipher = new EncryptedKeyCipher(Symmetric.GetType().FullName);
CopyTo(cipher);
cipher.KeyStorage = null;
return(cipher);
}
/// <summary>
/// Copies certain characteristics of this instance to the <paramref name="cipher"/> parameter.
/// The goal is to produce a cipher with the same encryption/decryption behavior but saving the key encryption and decryption ceremony and overhead if possible.
/// Here it creates a <see cref="SymmetricAlgorithm"/> object identical to the current <see cref="Symmetric"/> and assigns it to <paramref name="cipher"/>'s <see cref="Symmetric"/>.
/// </summary>
/// <param name="cipher">The cipher that gets the identical symmetric algorithm object.</param>
protected virtual void CopyTo(
SymmetricKeyCipherBase cipher)
{
if (cipher == null)
{
throw new ArgumentNullException(nameof(cipher));
}
if (!IsSymmetricKeyInitialized)
{
return;
}
cipher.Symmetric = SymmetricAlgorithm.Create(Symmetric.GetType().FullName);
CopyToSymetricAlgorithm(cipher.Symmetric);
cipher.IsSymmetricKeyInitialized = true;
cipher.ShouldEncryptIV = ShouldEncryptIV;
}