| /** |
| * Copyright 2019 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ************************************************************************** |
| */ |
| |
| #import "ViewController.h" |
| |
| #import "AeadPrimitive.h" |
| |
| @interface ViewController () |
| |
| @end |
| |
| @implementation ViewController |
| |
| - (void)viewDidLoad { |
| [super viewDidLoad]; |
| |
| self.aead = [[AeadPrimitive alloc] init]; |
| self.ciphertext.delegate = self; |
| self.decrypted.delegate = self; |
| } |
| |
| - (IBAction)encryptButton:(id)sender { |
| // Encrypt the plaintext. |
| NSError *error = nil; |
| NSData *ciphertext = [self.aead encryptUTF8String:self.plaintext.text error:&error]; |
| if (!ciphertext || error) { |
| NSLog(@"Failed to encrypt plaintext, error: %@", error); |
| return; |
| } |
| // Base64 encode the ciphertext and display it in the ciphertext UITextField. |
| self.ciphertext.text = [ciphertext base64EncodedStringWithOptions:0]; |
| } |
| |
| - (IBAction)decryptButton:(id)sender { |
| NSData *encryptedData = [[NSData alloc] initWithBase64EncodedString:self.ciphertext.text |
| options:0]; |
| |
| // Decrypt the ciphertext. |
| NSError *error = nil; |
| NSString *decrypted = [self.aead decryptToUTF8String:encryptedData error:&error]; |
| if (!decrypted || error) { |
| NSLog(@"Failed to decrypt ciphertext, error: %@", error); |
| return; |
| } |
| self.decrypted.text = decrypted; |
| } |
| |
| - (IBAction)resetButton:(id)sender { |
| self.plaintext.text = @""; |
| self.ciphertext.text = @""; |
| self.decrypted.text = @""; |
| } |
| |
| - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField { |
| BOOL editable; |
| if (textField == self.plaintext || textField == self.ciphertext) { |
| editable = YES; |
| } else { |
| editable = NO; |
| } |
| return editable; |
| } |
| |
| @end |