Could you provide sample code for CC1310 AES CCM?

Hi Richard,

I, too, had some troubles running the above example.  I single-stepped the above instructions and got stuck in the "CryptoCC26XX_transact()" API.  I was able to pull in the TI CryptoCC26XX.c source code and found that execution halts in the following code snippet:

/* Pend on blocking mode semaphore and wait for Hwi to finish. */
if (!Semaphore_pend(Semaphore_handle(&(object->waitSem)), object->timeout))
{
.
.

Any clues or hints would be appreciated.

Thank you!

Sorry guys,

I have lost track of this. Could you solve your problem? I have just posted demo code for the AES hardware module in another thread that does not use the TI-RTOS crypto driver, but only DriverLib.

Hi Richard

You meas this one you posted?

HH

Yes.

Hello,

I am having this very same issue when running AES_CCM on CC2640 w/ SDK2.21 - Single stepping through it does show me stuck in the Semaphore_pend like discussed above - Did anyone figure out what was missing ?

Thanks,

Padmaja

Below is my code very similar to what was posted on this thread before.

#include <ti/drivers/crypto/CryptoCC26XX.h>
#include <xdc/runtime/System.h>

#define macLength (4)
#define clearTextLength (16)
#define cipherTextLength (macLength + clearTextLength)
#define nonceLength (12)
#define aadLength (14)

// AES-CCM setup example struct
typedef struct
{
uint8_t key[16]; // A 128 Bit AES key
CryptoCC26XX_KeyLocation keyLocation; // One of 8 key locations in the hardware
uint8_t clearAndCipherText[cipherTextLength]; // Holds the cleartext before, and the ciphertext
// after the encryption operation.
// Ciphertext = encrypted text + message authentication code (MAC).
uint8_t nonce[nonceLength]; // A value that is used only once (cryptographic term 'nonce')
uint8_t header[aadLength]; // A header that is not encrypted but is authenticated in the operation (AAD).
} tAESCCMExample;

// AES CCM example data
tAESCCMExample sAESexample =
{
.key = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C },
.keyLocation = CRYPTOCC26XX_KEY_0,
.clearAndCipherText = { 't','h','i','s','i','s','a','p','l','a','i','n','t','e','x','t','0','0','0','0' },
.nonce = { 't','h','i','s','i','s','a','n','o','n','c','e' },
.header = { 't','h','i','s','i','s','a','h','e','a','d','e','r','1' }
};

// Declaration (typically done in a task)
CryptoCC26XX_Handle handle;
CryptoCC26XX_Params params;
uint8_t keyIndex;
CryptoCC26XX_AESCCM_Transaction trans;
uint8_t status;

void AES_CCM()
{
// Initialize Crypto driver
CryptoCC26XX_init();
// Configure CryptoCC26XX parameters.
CryptoCC26XX_Params_init(&params);
handle = CryptoCC26XX_open(Board_CRYPTO, false, &params);
if (!handle)
{
System_printf("CryptoCC26XX did not open");
}
else
{
keyIndex = CryptoCC26XX_allocateKey(handle, sAESexample.keyLocation,
(const uint32_t *) sAESexample.key);
if (keyIndex != CRYPTOCC26XX_STATUS_ERROR)
{

// Encrypt and sign message
CryptoCC26XX_Transac_init((CryptoCC26XX_Transaction *) &trans, CRYPTOCC26XX_OP_AES_CCM)
trans.keyIndex = keyIndex;
trans.authLength = macLength;
trans.nonce = (char *) sAESexample.nonce;
trans.header = (char *) sAESexample.header;
trans.fieldLength = 3;
trans.msgInLength = clearTextLength;
trans.headerLength = aadLength;
trans.msgIn = (char *) &(sAESexample.clearAndCipherText[0]); // Message is encrypted in place
trans.msgOut = (char *) &(sAESexample.clearAndCipherText[clearTextLength]); // MAC will be written to this position
// Do AES-CCM operation
status = CryptoCC26XX_transact(handle, (CryptoCC26XX_Transaction *) &trans);
if (status != CRYPTOCC26XX_STATUS_SUCCESS)
{
System_printf("Encryption and signing failed.");
while(1);
}

// Decrypt and authenticate message
CryptoCC26XX_Transac_init((CryptoCC26XX_Transaction *) &trans, CRYPTOCC26XX_OP_AES_CCMINV);
trans.keyIndex = keyIndex;
trans.authLength = macLength;
trans.nonce = (char *) sAESexample.nonce;
trans.header = (char *) sAESexample.header;
trans.fieldLength = 3;
trans.msgInLength = clearTextLength;
trans.headerLength = aadLength;
trans.msgIn = (char *) &(sAESexample.clearAndCipherText[0]); // Message is decrypted in place
trans.msgOut = (char *) &(sAESexample.clearAndCipherText[clearTextLength]); // MAC will be written to this position

// Do AES-CCM operation
status = CryptoCC26XX_transact(handle, (CryptoCC26XX_Transaction *) &trans);
if (status != CRYPTOCC26XX_STATUS_SUCCESS)
{
System_printf("Decryption and authentication failed.");
while(1);
}

// Release the key location
status = CryptoCC26XX_releaseKey(handle, &keyIndex);
if (status != CRYPTOCC26XX_STATUS_SUCCESS)
{
System_printf("Key release was not successful.");
while(1);
}
}
else
{
System_printf("Key Location was not allocated.");
}
}
}

Sorry. User error on my part. I should be calling this function after BIOS_start as it requires the RTOS scheduler. Thanks JXS for your help offline.

Regards,
Padmaja

#include <ti/drivers/crypto/CryptoCC26XX.h>
#include <xdc/runtime/System.h>

#define macLength (4)
#define clearTextLength (16)
#define cipherTextLength (macLength + clearTextLength)
#define nonceLength (12)
#define aadLength (14)


// AES-CCM setup example struct
typedef struct
{
uint8_t key[16]; // A 128 Bit AES key
CryptoCC26XX_KeyLocation keyLocation; // One of 8 key locations in the hardware
uint8_t clearAndCipherText[cipherTextLength]; // Holds the cleartext before, and the ciphertext
// after the encryption operation.
// Ciphertext = encrypted text + message authentication code (MAC).
uint8_t nonce[nonceLength]; // A value that is used only once (cryptographic term 'nonce')
uint8_t header[aadLength]; // A header that is not encrypted but is authenticated in the operation (AAD).
} tAESCCMExample;

// AES CCM example data
tAESCCMExample sAESexample =
{
.key = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C },
.keyLocation = CRYPTOCC26XX_KEY_0,
.clearAndCipherText = { 't','h','i','s','i','s','a','p','l','a','i','n','t','e','x','t','0','0','0','0' },
.nonce = { 't','h','i','s','i','s','a','n','o','n','c','e' },
.header = { 't','h','i','s','i','s','a','h','e','a','d','e','r','1' }
};


// Declaration (typically done in a task)
CryptoCC26XX_Handle handle;
CryptoCC26XX_Params params;
uint8_t keyIndex;
CryptoCC26XX_AESCCM_Transaction trans;
uint8_t status;

void AES_CCM()
{
// Initialize Crypto driver
CryptoCC26XX_init();
// Configure CryptoCC26XX parameters.
CryptoCC26XX_Params_init(&params);
handle = CryptoCC26XX_open(Board_CRYPTO, false, &params);
if (!handle)
{
System_printf("CryptoCC26XX did not open");
}
else
{
keyIndex = CryptoCC26XX_allocateKey(handle, sAESexample.keyLocation,
(const uint32_t *) sAESexample.key);
if (keyIndex != CRYPTOCC26XX_STATUS_ERROR)
{

// Encrypt and sign message
CryptoCC26XX_Transac_init((CryptoCC26XX_Transaction *) &trans, CRYPTOCC26XX_OP_AES_CCM)
trans.keyIndex = keyIndex;
trans.authLength = macLength;
trans.nonce = (char *) sAESexample.nonce;
trans.header = (char *) sAESexample.header;
trans.fieldLength = 3;
trans.msgInLength = clearTextLength;
trans.headerLength = aadLength;
trans.msgIn = (char *) &(sAESexample.clearAndCipherText[0]); // Message is encrypted in place
trans.msgOut = (char *) &(sAESexample.clearAndCipherText[clearTextLength]); // MAC will be written to this position
// Do AES-CCM operation
status = CryptoCC26XX_transact(handle, (CryptoCC26XX_Transaction *) &trans);
if (status != CRYPTOCC26XX_STATUS_SUCCESS)
{
System_printf("Encryption and signing failed.");
while(1);
}

// Decrypt and authenticate message
CryptoCC26XX_Transac_init((CryptoCC26XX_Transaction *) &trans, CRYPTOCC26XX_OP_AES_CCMINV);
trans.keyIndex = keyIndex;
trans.authLength = macLength;
trans.nonce = (char *) sAESexample.nonce;
trans.header = (char *) sAESexample.header;
trans.fieldLength = 3;
trans.msgInLength = cipherTextLength; // --> typo, was clearTextLength;
trans.headerLength = aadLength;
trans.msgIn = (char *) &(sAESexample.clearAndCipherText[0]); // Message is decrypted in place
trans.msgOut = (char *) &(sAESexample.clearAndCipherText[clearTextLength]); // MAC will be written to this position

// Do AES-CCM operation
status = CryptoCC26XX_transact(handle, (CryptoCC26XX_Transaction *) &trans);
if (status != CRYPTOCC26XX_STATUS_SUCCESS)
{
System_printf("Decryption and authentication failed.");
while(1);
}

// Release the key location
status = CryptoCC26XX_releaseKey(handle, &keyIndex);
if (status != CRYPTOCC26XX_STATUS_SUCCESS)
{
System_printf("Key release was not successful.");
while(1);
}
}
else
{
System_printf("Key Location was not allocated.");
}
}
}