About AKova.3

AKova.3 · 2024-11-08

I am working with SAES on STM32U585. I am trying to make use of wrapping/unwrappinng my encryption key with hardware-secret key DHUK . This in the SAES initialization I am using hcryp.Instance = SAES; hcryp.Init.DataType = CRYP_BYTE_SWAP; hcryp.I...

AKova.3 · 2024-07-17

I have been trying to figure out which code exactly needs to be put in SRAM4 memory region for the LPBAM tool to work. All the examples I could find only use SRAM4 and fail to explain which parts are strictly needed to be placed in that part of the m...

AKova.3 · 2020-09-23

I am trying to reprogram a custom board with STM32F411RC over I2C using the built-in bootloader. I am able to successfully issue the Get version, Get ID and Get command and get correct response. After that when I try to do a No-streach mass erase (da...

AKova.3 · 2020-08-28

I am working on a custom board with STM32F411RC which can communicate over SPI and I2C to the master board and acts as a slave in both cases. The master board also needs to be able to reprogram my board over I2C. Chip select signal is used to control...

AKova.3 · 2024-11-27

I understand that there is chaining between blocks of a single message, but is there also chaining between subsequent messages, that is subsequent calls to, for instance HAL_CRYP_Decrypt funtion because the peripheral retains some internal state betw...

AKova.3 · 2024-11-27

Fair point about key wrapping, but I wasn't really concerned about it at this point. I tried running your code. What is there works fine. If I however add another exactly the same call to HAL_CRYP_Decrypt after the first one, it produces different re...

AKova.3 · 2024-11-27

With this piece of code in place, the program behaves the same as before.

AKova.3 · 2024-11-26

The code you posted works for me in ECB mode, but not in CBC. In CBC mode I get the correct result only the on the first call to HAL_CRYP_Decrypt, all the following calls produce incorrect result, which is at least the same every time.

AKova.3 · 2024-11-17

I appriciate your help but it still didn't solve my issue. I still get the incorrect result when I put the line you suggested before the first call to HAL_CRYP_Decrypt. As before I have configured AES in CBC mode with 128 bit key with this the follow...

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SAES using wrapped key

Which code needs to be put in SRAM4 when using LPBAM tool

No ACK after mass erase

Hard fault due to an external signal applied to the BOOT0 pin during runtime

Re: SAES using wrapped key

Re: SAES using wrapped key

Re: SAES using wrapped key

Re: SAES using wrapped key

Re: SAES using wrapped key