Encrypt/decrypt string with des cbc mode obj-c - objective-c

Question

hi guys i'm pretty new in obj-c world and i would like know how can I encrypt a string in des? I already tried search but could not find any sample code that could help me the only thing I realized is that there is a class commonCrypt to do what I want but I do not know how to use it
my code
NSString* key = #"abc43HU0";
NSString *token = #"hellohello";
const void *vplainText;
size_t plainTextBufferSize;
plainTextBufferSize = [token length];
vplainText = (const void *) [token UTF8String];
CCCryptorStatus ccStatus;
uint8_t *bufferPtr = NULL;
size_t bufferPtrSize = 0;
size_t *movedBytes = NULL;
bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
memset((void *)bufferPtr, 0x0, bufferPtrSize);
// memset((void *) iv, 0x0, (size_t) sizeof(iv));
//NSString *initVec = #"init Vec";
const void *vkey = (const void *) [key UTF8String];
const void *vinitVec = (const void *) [key UTF8String];
ccStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmDES,
kCCModeCBC,
vkey, //"123456789012345678901234", //key
kCCKeySizeDES,
vinitVec,// vinitVec, //"init Vec", //iv,
vplainText, //"Your Name", //plainText,
plainTextBufferSize,
(void *)bufferPtr,
bufferPtrSize,
movedBytes);
NSString *result;
NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
result = [myData base64encoding;
crypt_result.text = myData;

Answer 1

this is the working code:
NSString* key = #"abc43HU0";
NSString *token = #"hellohello";
const void *vplainText;
size_t plainTextBufferSize = [token length];
vplainText = (const void *) [token UTF8String];
CCCryptorStatus ccStatus;
uint8_t *bufferPtr = NULL;
size_t bufferPtrSize = 0;
size_t movedBytes = 0;
bufferPtrSize = (plainTextBufferSize + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1);
bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
memset((void *)bufferPtr, 0x0, bufferPtrSize);
Byte iv [] = {0x65, 0x110, 0x68, 0x26, 0x69, 0x178, 0x200, 0x219};
const void *vkey = (const void *) [key UTF8String];
ccStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmDES,
kCCOptionPKCS7Padding,
vkey,
kCCKeySizeDES,
iv,
vplainText,
plainTextBufferSize,
(void *)bufferPtr,
bufferPtrSize,
&movedBytes);
NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
NSString* result = [base64 base64EncodeData:myData];//my own method to encoding with base64

Answer 2

Try kCCOptionPKCS7Padding | kCCModeCBC for ccOptions parameter.