zLSpYuRd

1NSString* testString = @"TestTest";
2NSString* secretKey = @"asdfsadf";
3
4NSData *reqStringData = [testString dataUsingEncoding:NSUTF8StringEncoding];
5
6NSData *encryptedData = [reqStringData AES128EncryptedDataWithKey:secretKey];
7NSString * encryptedString = [[NSString alloc] initWithData:encryptedData encoding:kCFStringEncodingUTF8];
8
9NSData *decryptedData = [[encryptedString dataUsingEncoding:kCFStringEncodingUTF8] AES128DecryptedDataWithKey:secretKey];
10NSString * decryptedString = [[NSString alloc] initWithBytes:[decryptedData bytes] length:[decryptedData length] encoding:kCFStringEncodingUTF8];
11
12NSLog(@"%@", decryptedString);
13	
14- (NSData *)AES128DecryptedDataWithKey:(NSString *)key
15{
16    return [self AES128DecryptedDataWithKey:key iv:nil];
17}
18
19- (NSData *)AES128Operation:(CCOperation)operation key:(NSString *)key iv:(NSString *)iv
20{
21    char keyPtr[kCCKeySizeAES128 + 1];
22    bzero(keyPtr, sizeof(keyPtr));
23    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
24
25    char ivPtr[kCCBlockSizeAES128 + 1];
26    bzero(ivPtr, sizeof(ivPtr));
27
28    if (iv) {
29        [iv getCString:ivPtr maxLength:sizeof(ivPtr) encoding:NSUTF8StringEncoding];
30    }
31
32    NSUInteger dataLength = [self length];
33    size_t bufferSize = dataLength + kCCBlockSizeAES128;
34    void *buffer = malloc(bufferSize);
35
36    size_t numBytesEncrypted = 0;
37    CCCryptorStatus cryptStatus = CCCrypt(operation,
38                                      kCCAlgorithmAES128,
39                                      kCCOptionPKCS7Padding | kCCOptionECBMode,
40                                      keyPtr,
41                                      kCCBlockSizeAES128,
42                                      ivPtr,
43                                      [self bytes],
44                                      dataLength,
45                                      buffer,
46                                      bufferSize,
47                                      &numBytesEncrypted);
48    if (cryptStatus == kCCSuccess) {
49        return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
50    }
51
52    free(buffer);
53    return nil;
54}