STM32 MCUs Security

Hello, I am trying to implement the HKDF algorithm to generate a secret key, and I found a link containing an example of HKDF implementation ( you will find link below in details) but unfortunately, the code is incomplete and I have a few questions.

the link : https://wiki.st.com/stm32mcu/index.php?title=Security:How_to_implement_HKDF_with_the_Cryptographic_library&oldid=11796&diff=prev#HKDF_implementation_example_using_HMAC-SHA256_Cryptographic_library_services .my questions is first, once I ad...

Resolved! Use STM32H7 CRC peripheral on Flash memory (instead of Flash CRC)

The STM32H753 has 2 CRCs. One global CRC and one specific for Flash memory.I think it is possible to use the global CRC for flash memory right ? The benefit would be to use a different polynom than the one from Flash CRC.is it possible to have an ide...

Resolved! STSAFE-A110 fails to generate shared secret when using STSAFEA_KEY_SLOT_1

Hello,I am working on an IoT security project, where a TPM like STSAFE-A110 is required for signature verification and data decryption. The latter fails with the mentioned chip and the static (non-ephemeral) private key.Setup:X-NUCLEO-SAFEA1 board (w...

STM32U5 Debug in RDP 0.5 With STM32CubeProgrammer

Hello,I am trying to start a debug session with STM32CubeIDE v1.11.2 on my board locked on RDP 0.5.I loaded a valid secure firmware which jumps into the non-secure firmware before setting RDP 0.5.I could connect STM32CubeProgrammmer and flash the non...

SB and SFU

Hey guys, I want to perform a firmware upgrade over the air. And use a UART to connect to IoT device.I use stm32l431xx and it contains hardware for symmetric encryption. And the host device which sends the binary uses stm32l496 has SBSFU.So I have a ...

STM32 Trusted Package Creator v2.12.0 creates incorrect option bytes

STM32 Trusted Package Creator v2.12.0 creates incorrect option bytes which have 8 rows and no "reserved" last row As per AN5054, it should have exactly 9 rows The option bytes csv created from STPC v2.12 This leads to SFI programming failure. Am I mi...

Resolved! LoRa packet with CRC error treated as valid

A packet with CRC error has both SUBGHZ_IT_RX_CPLT and SUBGHZ_IT_CRC_ERROR flag set.In stm32wlxx_hal_subghz.c, this leads to both RxCpltCallback() and CRCErrorCallback() being called.https://github.com/STMicroelectronics/STM32CubeWL/blob/main/Drivers...

Resolved! How do I add the CMOX crypto stack to an existing project?

I have an existing STM32L433 project (CubeIDE 1.8.0) to which I want to add AES functionality via the CMOX crypto stack (https://www.st.com/en/embedded-software/x-cube-cryptolib.html). I am unclear as to where I am supposed to put the .a file, and al...

Is the AES peripheral on the STM32L4xx MCUs able to handle key sizes larger than 32 bytes? Is there a list of elliptic curves that will work with a 32 byte key?

It seems that 32 bytes (256 bits) is the maximum key size. If so, is there a list of elliptic curves that will work with keys of this size?

Proper way to share peripherals between bootloader and UserApp in SBSFU. STM32WB CPU2 getting stuck.

Hello guys, how are you?Currently i have an interesting problem happening with my STM32WB5M. I have a project that uses SBSFU alongside with a firmware that uses the BLE peripheral with CPU2 and etc. I don't use the BLE loader, i developed i customiz...

STM32 MCUs Security

Forum Posts

Hello, I am trying to implement the HKDF algorithm to generate a secret key, and I found a link containing an example of HKDF implementation ( you will find link below in details) but unfortunately, the code is incomplete and I have a few questions.

Resolved! Use STM32H7 CRC peripheral on Flash memory (instead of Flash CRC)

Resolved! STSAFE-A110 fails to generate shared secret when using STSAFEA_KEY_SLOT_1

STM32U5 Debug in RDP 0.5 With STM32CubeProgrammer

SB and SFU

STM32 Trusted Package Creator v2.12.0 creates incorrect option bytes

Resolved! LoRa packet with CRC error treated as valid

Resolved! How do I add the CMOX crypto stack to an existing project?

Is the AES peripheral on the STM32L4xx MCUs able to handle key sizes larger than 32 bytes? Is there a list of elliptic curves that will work with a 32 byte key?

Proper way to share peripherals between bootloader and UserApp in SBSFU. STM32WB CPU2 getting stuck.

Alternate OBK sector on STM32H56x

Firmware is not running in the provisioning state ...

Any method to implement X-CUBE-CRYPTOLIB in the pr...

Unable to the flash after using X-CUBE-SBSFU to te...

Disable iCache access to the OBK address range on ...

Accessing UART in Nonsecure region