private static ITINKDeterministicAead InitDeterministicAead(string keyName)
{
TINKKeysetHandle handle = LoadOrCreateKey(keyName, CreateDeterministicAeadKey);
ITINKDeterministicAead aeadDeter = TINKDeterministicAeadFactory.PrimitiveWithKeysetHandle(handle, out NSError error);
if (error != null)
{
throw new Exception("Failed to create DeterministicAead: " + error.LocalizedFailureReason);
}
return(aeadDeter);
}
private void TestDeterTink()
{
NSError error;
RegisterAead();
var handleStore = new TINKKeysetHandle("name", out error);
// aead deter
var tpl = new TINKDeterministicAeadKeyTemplate(TINKDeterministicAeadKeyTemplates.TINKAes256Siv, out error);
var handle = new TINKKeysetHandle(tpl, out error);
ITINKDeterministicAead aeadDeter = TINKDeterministicAeadFactory.PrimitiveWithKeysetHandle(handle, out error);
if (error != null)
{
Console.WriteLine("Error: " + error.LocalizedFailureReason);
return;
}
// encrypt
string[] items = new string[]
{
"key_long_1",
"key_email",
};
for (int i = 0; i < 2; i++)
{
foreach (var item in items)
{
// encrypt
string associatedData = "name_default";
NSData cipher = aeadDeter.EncryptDeterministically(NSData.FromString(item, NSStringEncoding.UTF8), NSData.FromString(associatedData, NSStringEncoding.UTF8), out error);
if (error != null)
{
Console.WriteLine(error.LocalizedFailureReason);
return;
}
Console.WriteLine(cipher.GetBase64EncodedString(NSDataBase64EncodingOptions.None));
// decrypt
NSData unencryped = aeadDeter.DecryptDeterministically(cipher, NSData.FromString(associatedData, NSStringEncoding.UTF8), out error);
if (error != null)
{
Console.WriteLine(error.LocalizedFailureReason);
return;
}
Console.WriteLine(unencryped.ToString(NSStringEncoding.UTF8));
}
}
}
private static TINKKeysetHandle LoadOrCreateKey(string keyName, Func <TINKKeysetHandle> createProvider)
{
TINKKeysetHandle handle = LoadFromKeychain(keyName);
if (handle != null)
{
Debug.WriteLine("Found key in iOS keychain, loaded: " + keyName);
return(handle);
}
// create new and store
handle = createProvider();
if (handle == null)
{
throw new Exception("Failed to create key: " + keyName);
}
if (!handle.WriteToKeychainWithName(keyName, false, out NSError error))
{
throw new Exception("Failed to store key to iOS keychain: " + keyName);
}
return(handle);
}
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));
}
