STM32 MCUs Security

I am Using SBSFU I am not able to get the same private key in der formate which is added in key.c file

I am using STM32L562E-DK board.I am using the SBSFU example. I want to use the ECDSA-256 cryptography scheme. When I am verifying private with key.c file it does not matchI have used following command to verify private.openssl ec -in root-ec-p256 -ou...

Resolved! Debugging STM32L55 Secure World Using Keil IDE

Hello, I have a simple application running on STM32L55 Secure World, but I would like to debug it step by step using an IDE.I am able to debug using the Keil IDE, but it seems the TZEN bit is zero. It must be about the defaults state of the STM32L55 ...

How to feed watchdog from an application which is started in bootloader

I am using STM32L562E-DK for my development. I have ported SBSFU for it. I want to add watchdog functionality to it. Currently, I am initializing the watchdog (window) from the application and feeding it from Freerto's task in the application.Now, I ...

Not able to read Flash data of STM32l5

I am using STM32L562E-DK.I have ported SBSBFU for it. It is working fine. I want to store my custom data into internal flash and read it on bootup time in the bootloader.For testing I am flashing one binary of 16 byte which's content is "Hello World!...

Resolved! "regression.sh" in "STM32Cube_FW_L5_V1.4.0" can't execute successfully

Hi,I don't do any change to the script file, please advise how to let the script work normally.Rgds,QiZhangD:\>cd D:\WSL_DIR\STM32Cube_FW_L5_V1.4.0\Projects\STM32L562E-DK\Applications\TFM\TFM_SBSFU_Boot\STM32CubeIDED:\WSL_DIR\STM32Cube_FW_L5_V1.4.0\P...

Is there any way to set write protect on flash memory for ever?

Hi,I want to block flash memory for writng after programming it. It is important that write protect should not be possible to deassert. I have read about RDP mechanism, but there is information that on level 2 write protection is permament, but only ...

Resolved! STM32L5 secure access to non-secure flash block read as zero. Is it an architecturally specified behavior or just an MCU specific behavior?

I am currently experimenting on stm32l562e-dk board, and I discovered that, in the secure world, non-secure flash cannot be read via a secure memory region (i.e. not covered by any of the SAU regions). To be specific, value of zero is read.I am wond...

FreeRTOS with SBSFU is not working

I am using the STM32L562E-DK development kit. I have taken reference to NUCLEO-L552ZE-Q and ported it for STM32L562E-DK. Also added External OSPI flash. without FreeRTOS it is working fine.I have added FreeRTOS in the nonsecure application. For that,...

STM32L562QEI6 enter Boot through USART interface

Hello,I have a system with one STM32L562QEI6 and one STM32F405RGT6, that is the main MCU.They communicate with USART interface.In the main CPU, boot0 and boot1 pins are phisically connected to VCC or GND through some resistors, so I can enter boot mo...

Not able to jump in application after adding external flash as secondary partition for STM32L562E-DK

I have ported the SBSFU application from NUCLEO-L552ZE-Q to STM32L562E-DK.The single-slot partition is working fine as expected without any issue.For my requirement, I have added a second slot in OSPI flash. Changed flash_layout.h and respective file...