CC3235MODASF: AES-CCM Configuration

Hi,

I am including all documentation we have on AES encryption.

https://www.ti.com/lit/an/swra509c/swra509c.pdf 

https://dev.ti.com/tirex/explore/node?a=IOGqZri__3.80.13.03&node=A__ANnox4Ad0GiVUzt2hT4adw__com.ti.SIMPLELINK_CC32XX_SDK__fc2e6sr__LATEST&r=wg2mfY3__6.10.00.00 

https://dev.ti.com/tirex/explore/node?a=IOGqZri__3.80.13.03&node=A__AaAWCBblrIypUYklEIIfkg__SIMPLELINK-ACADEMY-CC32XX__-LLELo7__LATEST&r=wg2mfY3__6.10.00.00 

Best,

Rogelio

Hi,

I have gone through the documentation but it is still does not work with initialization vector. Here is my code:

CryptoCC32XX_Handle     cryptoHandle1;

CryptoCC32XX_EncryptParams aesCCMParams;

CryptoCC32XX_EncryptMethod  method;

unsigned char               plainData[16] = "plaindata12345";
unsigned int                plainDataLen = sizeof(plainData);
unsigned char               cipherData[16];
unsigned int                cipherDataLen;

unsigned char aesKey[16]= "aesencyrptionke";
uint8_t aesIV[16]="000000000000002";
unsigned char decryptedData[16]="";
int32_t retVal = -1;

void encryptFunc()
{
 method = CryptoCC32XX_AES_CCM;
    aesCCMParams.aes.pKey = &aesKey[0];
    aesCCMParams.aes.keySize = CryptoCC32XX_AES_KEY_SIZE_128BIT;
    aesCCMParams.aes.pIV = &aesIV[0]; 
    cryptoHandle1  = CryptoCC32XX_open(0, CryptoCC32XX_AES);
    retVal = CryptoCC32XX_encrypt(cryptoHandle1, method, &plainData[0], sizeof(plainData), &cipherData[0], sizeof(cipherData), &aesCCMParams);
    retVal = CryptoCC32XX_decrypt(cryptoHandle1, method, &cipherData[0], sizeof(cipherData), &decryptedData[0], sizeof(decryptedData), &aesCCMParams);
    }

I donot get the plaindata back after decryption.

All works fine without the IV. I understand that IV is the nonce in case of AES-CCM. But it does not work properly. Plz help

Hi SN,

I apologize for the delay, ive been out sick. In this case the code looks almost the same as the example 

The one difference I am seeing the the IV pointer is not a void * but instead a uint8_t *. Can you try changing it to a null pointer and test the results. 

Best,

Rogelio

Hi Rogelio,

I tried changing it to void* and it still doesn't work.

Hi,

Is there any update on this? Have you tested it on your side? Our product is on hold because of this issue. Kindly look into it.