repair 1400596/105539

- (NSData*) encryptString:(NSString*)plaintext withKey:(NSString*)key {
    return [[plaintext dataUsingEncoding:NSUTF8StringEncoding] AES256EncryptWithKey:key];
}

- (NSString*) decryptData:(NSData*)ciphertext withKey:(NSString*)key {
    return [[NSString alloc] initWithData:[ciphertext AES256DecryptWithKey:key] encoding:NSUTF8StringEncoding];
}