keychain/trust/TrustedPeersTests/TPDummyEncrypter.m

   1 /*
   2  * Copyright (c) 2017 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #import "TPDummyEncrypter.h"
  25 #import "TPDummyDecrypter.h"
  26
  27 @interface TPDummyEncrypter ()
  28 @property (nonatomic, strong) NSData *decryptionKey;
  29 @end
  30
  31 @implementation TPDummyEncrypter
  32
  33 + (instancetype)dummyEncrypterWithKey:(NSData *)key
  34 {
  35     TPDummyEncrypter *enc = [[TPDummyEncrypter alloc] init];
  36     enc.decryptionKey = key;
  37     return enc;
  38 }
  39
  40 - (nullable NSData *)encryptData:(NSData *)plaintext error:(NSError **)error
  41 {
  42     // It's just XOR with rotating key, so "encryption" == "decryption"
  43     return [[TPDummyDecrypter dummyDecrypter] decryptData:plaintext
  44                                                   withKey:self.decryptionKey
  45                                                     error:error];
  46 }
  47
  48 @end