CC2640R2F: ECDSA with BLE5 stack

Darcy Huisman

Part Number: CC2640R2F

Hi,

I was successfully able to perform ECDSA operations using the ECC ROM implementation (ECCROMCC26XX.h) on the BLE 4.2 stack. However, I am unable to do this with the BLE5 stack because the same ECC ROM implementation on BLE5 is not the same, it does not have the required functions such as ECCROMCC26XX_signHash and ECCROMCC26XX_verifyHash, see the link below for the available functions.

https://dev.ti.com/tirex/explore/content/simplelink_cc2640r2_sdk_4_30_00_08/docs/ble5stack/ble_user_guide/doxygen/ble/html/_e_c_c_r_o_m_c_c26_x_x_8h.html

I am using version 4.30 for both the 4.20 and 5.0 stacks.

There is an ECDSA driver available for CC13x2/CC26x2 devices but not for CC13x0/CC26x0 devices, https://dev.ti.com/tirex/explore/content/simplelink_cc2640r2_sdk_4_30_00_08/docs/tidrivers/doxygen/html/index.html.

Is it possible to perform ECDSA on the BLE5 stack, in addition to the BLE stack? If so, how can I do it?

Thanks,

Darcy

over 5 years ago

0 Jenny T over 5 years ago

TI__Expert 4435 points

Hi Darcy,

You should be able to migrate the ECC ROM driver files into your BLE5 stack project and re-use the APIs similar to how you are using them on the BLE stack.

Best Regards,

Jenny

0 Darcy Huisman over 5 years ago in reply to Jenny T

Intellectual 280 points

Hi Jenny,

Thanks for the confirmation. I had actually tried that before but did not have success, so I must have done something wrong. Your answer prompted me to try again and it works!

In the meantime, I had begun to try some third-party libraries. I had nearly completed integrating them but I abandoned them now (worse performance, flash size, etc.)

Thank you!

Darcy Huisman

0 Jenny T over 5 years ago in reply to Darcy Huisman

TI__Expert 4435 points

Hi Darcy,

Glad to hear that it worked!

Best Regards,

Jenny

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CC2640R2F: ECDSA with BLE5 stack