XXTEA

Objective-C implementation of XXTEA cipher for OS X and iOS.

Installation

Open project in Xcode then drag XXTEA directory (or XXTEA.h & XXTEA.m) to your project directory (or any subdirectory).

Make sure 'Create groups' in 'Added folders' is checked.

Usage

We create a string sampleString to demonstrate how to use xxtea. xxtea works with NSData so,

NSString *sampleString = @"Hello, world! 你好，世界！";
NSData *data = [sampleString dataUsingEncoding:NSUTF8StringEncoding];

Importing Header File

#import "XXTEA.h"

Preparing Secret Key

Load your secret key (16-bytes memory block) into memory or generate a random one:

char key[XXTEA_KEY_LENGTH];
XXTEAFillRandomKey(key);

Encrypting

NSData *encryptedData = XXTEAEncryptData(data, key);

// output: length: 32/36
NSLog(@"Length: %tu/%tu", data.length, encryptedData.length);

Decrypting

NSData *originalData = XXTEADecryptData(encryptedData, key);

// output: Hello, world! 你好，世界！
NSString *originalString = [NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"%@", originalString);

License

XXTEA is released under the MIT license. See LICENSE for details.

everbeen/xxtea