public NSData Decrypt(NSData cipherData, NSData associatedData)
{
NSData result = _aead.Decrypt(cipherData, associatedData, out NSError error);
if (error != null)
{
Debug.WriteLine(error.LocalizedFailureReason);
return(null);
}
return(result);
}
private void TestTink()
{
RegisterAead();
// gen key
NSError error;
var tpl = new TINKAeadKeyTemplate(TINKAeadKeyTemplates.Aes256Gcm, out error);
if (error != null)
{
Console.WriteLine("Error: " + error);
return;
}
var handle = new TINKKeysetHandle(tpl, out error);
if (error != null)
{
Console.WriteLine("Error: " + error);
return;
}
// store
var keysetName = "co.tnn.tink.demo_key";
if (!handle.WriteToKeychainWithName(keysetName, true, out error))
{
Console.WriteLine("Error: " + error);
return;
}
// load
TINKKeysetHandle handleStore = new TINKKeysetHandle(keysetName, out error);
if (error != null)
{
Console.WriteLine("Error: " + error);
return;
}
// AEAD
ITINKAead aead = TINKAeadFactory.PrimitiveWithKeysetHandle(handleStore, out error);
if (error != null)
{
Console.WriteLine("Error: " + error);
return;
}
// encrypt
NSData cipher = aead.Encrypt(NSData.FromString("hello world", NSStringEncoding.UTF8), NSData.FromString("k_value", NSStringEncoding.UTF8), out error);
if (error != null)
{
Console.WriteLine("Error: " + error);
return;
}
Console.WriteLine(cipher.GetBase64EncodedString(NSDataBase64EncodingOptions.None));
// decrypt
var plain = aead.Decrypt(cipher, NSData.FromString("k_value", NSStringEncoding.UTF8), out error);
if (error != null)
{
Console.WriteLine("Error: " + error);
return;
}
Console.WriteLine(plain.ToString(NSStringEncoding.UTF8));
}