STM32 MCUs Security
Ask questions and find answers on STM32 security frameworks and tools, including cryptographic libraries, TrustZone, and the Secure Manager.
Forum Posts
Resolved! STM32H753 with "secure area": how to un-brick?
So I have a STM32H753 with active "secure area" - but the code in the secure area is buggy and hangs before jumping outside.Is there a way to erase the MCU and recover, or it is bricked?No RDP is set.
CRC Calculation for 8-bit values
I am experimenting with CRC Calculation on a STM32F4-Discovery.As I have seen in the reference manual this MCU is using CRC-32 used in Ethernet. I am also using https://crccalc.com/ (CRC-32/MPEG-2) to validate the results.I just activate the CRC in C...
Application hangs when doing a remote update
The details of this project are like this. I have a working product on the F417 that I wish to add Remote update capabilities to.Product is already deployed with SBSFU and updates using Ymodem through the UART work fine.What I am trying to add on now...
Resolved! STM32 Secure Engine adding additional API in se_crypto_bootloader.c.
Is there a an option to implement SE_<FOO> in se_crypto_bootloader.c. I tried implementing a SE_FOO but the system reset as mentioned in document ."Protected code and data are accessible through a single entry point (call gate mechanism) and it is t...
SBSFU - ECCKEY and AES Key
Hi,I have a bit trouble understanding the two keys in the SBSFU and which pairs is actually used. From AN5056, chapter 5 there is stated how to generate the two different methods and the AES key I could successfully adjust. With the ECCKEY method and...
Resolved! Can I use Trustzone with DBANK=0 ?
The examples in CubeU5 package always states to activate dual bank mode, when using TrustZone. Can't you use single bank mode and just allocate specific sectors to be secure?Is it possible to use TrustZone without dual bank? Some types don't have it....
Resolved! How can I debug the issue that my FW signature verification fails ?
Hello,I am using the SBSFU with the KMS on my STM32L486RG. I activated the verbose debug in the config file and this is the output that i am getting when flashing the binary file combining the boot-loader and my user application at the same time : A...
Resolved! ECDSA Signature verify for a composite file (FW + GUI + Calibration data)
Setup:Device - STM32H7B3I-DKProject - STM32H7B3I-DK\Applications\2_Images_ExtFlashWe have Composite firmware update file which contains and stored in external flash which Boot loader will process APP firmware (UserApp.sfb )GUI resources Calibration d...
X-CUBE-CRYPTOLIB, is it necessary to request the software?
Hi,I'm working on a project that needs AES256 encryption, I requested the X-CUBE-CRYPTOLIB software, but it's being validated by STM32, my question is, why does this validation exist? Is there any criteria for them to make the software available? Wha...