STM32 MCUs Security

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Hard Fault when reading flash

I am working to generate the CRC for the flash memory, During this I am facing hard fault when the CRC module tries to read from certain flash locations, to debug it I made a small loop which assigns the value of each 4 byte. I found that reading at ...

sivaram by Associate III
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  • 23 replies
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Resolved! Firmware with SBSFU bootloader with SFI at manufacturing

Hi,I am doing feasibility on SBSFU bootloader on STM32H753ZI. Currently in our firmware we are planning to have a custom bootloader based on SBSFU for secure boot and update. But I came across SFI feature from ST to ensure protection at the manufactu...

h_adi by Associate
  • 354 Views
  • 1 replies
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Resolved! CRYPT module

Hi Good day,       Trying to understand the CRYPTO module for MAC generation, particularly AES CBS MAC. Which algorithm mode i have to choose?, found AES CBC not AES CBC MAC.

sarun by Associate III
  • 313 Views
  • 1 replies
  • 2 kudos

Resolved! STM32H753ZI secure memory recover

Hello,I've implemented secure bootloader on STM32H753ZI using SBSFU examples and it's working very well. To secure the board I use WRP + RDP Level 1 + Secure Memory Area for bootloader. I would like to have option to recover from this state and be ab...

kicur by Associate II
  • 760 Views
  • 4 replies
  • 4 kudos

NUCLEO-H745ZI-Q SBSFU adaptation cannot boot CM4 image.

Hello, I am trying to adapt the H753xx SBSFU implementation to the H745xx dual core board.I have so far configured a second slot by creating a second MPU region of 1KB to protect the header of the second slot, as well as changing the security checks ...

AKhri.1 by Associate II
  • 420 Views
  • 2 replies
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Resolved! secure firmware update using USART

Hi everyone,I'm working in a Medical devices company and we use currently plenty of STM32s (F0,F1,F4, maybe soon H7). Until now, we didn't bother that much the cybersecurity topic for the firmwares but now the norms are forcing us :D.I checked a bit ...

TKopp.67 by Associate II
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  • 2 replies
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Resolved! How to enable the STM32H750VBT6 HW crypto?

I've tried to enable the CRYPT and HASH peripherals by setting bits 5 and 4 in the AHB2ENR register, but all peripheral registers read as zero and writes are ignored as if the clock wasn't enabled or the peripheral was missing. Does this chip have ha...

JBram.1 by Associate II
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  • 14 replies
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Resolved! H7 SBSFU DTCM usage

Hi All,Does the SBSFU reserve all of the DTCM in an H7 (stored state information, etc., expected to be stable across Core resets) such that the application shouldn't touch any of it after beginning execution?  The "Protected RAM ..." note in AN5056 F...