/// <inheritdoc />
/// <inheritdoc cref="EnsureParameter" />
public async Task ProtectAsync(byte[] userData)
{
this.EnsureParameter(userData);
var encryptedBytes = await _encryptor.EncryptAsync(userData, _key)
.ConfigureAwait(false);
SetBytesToByteArray(
source: encryptedBytes,
target: ref userData);
}
private async Task <byte[]> EncryptAsync(byte[] plainBytes, byte[] saltBytes, byte[] encryptionKey)
{
var salted = plainBytes.Combine(saltBytes);
try
{
return(await _encryptor.EncryptAsync(salted, encryptionKey)
.ConfigureAwait(false));
}
finally
{
if (salted != null)
{
Array.Clear(salted, 0, salted.Length);
}
}
}
