CC1310: How to use AES CTR Mode

manish

Part Number: CC1310

Tool/software:

Please advise how to use the AES CTR mode on CC1310 which does not seem to have driver lib implementation. So, the AES CTR functionality needs to be invoked via the ROM based Crypto functions.

AES_CTR_EncryptData(encryptedData, sizeof(inputData), aesKey, nonce, iv);

When this function is used, it goes to the exception handler at run time.

Thanks.

over 1 year ago

+1 Marie H over 1 year ago

TI__Guru* 81261 points

Hi Manish,

My recommendation would be to use the AESCTR driver and the AESCTR_oneStepEncrypt API. https://dev.ti.com/tirex/explore/content/simplelink_cc13x0_sdk_4_20_01_03/docs/tidrivers/doxygen/html/_a_e_s_c_t_r_8h.html

I'm not sure what you mean by ROM based crypto functions. The CC1310 has several hardware accelerators and if you use our drivers you will use these. Some RTOS and driver code is stored in ROM, but if you need to debug a driver you can import it to your workspace, load the ROM symbols or even run the code from flash.

https://dev.ti.com/tirex/explore/content/simplelink_cc13x0_sdk_4_20_01_03/docs/proprietary-rf/proprietary-rf-users-guide/proprietary-rf-guide/debugging-index.html#loading-ti-rtos-in-rom-symbols

Cheers,

Marie H

0 manish over 1 year ago in reply to Marie H

Prodigy 60 points

I was looking at the older forum posts from the time when there was no SDK example using the AESCTR_oneStepEncrypt API. Your answer has helped and we have a working AESCTR sequence in our code. Thanks!

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CC1310: How to use AES CTR Mode