How to verify image signature before writing to ota partition?

zhouzhendong
Posts: 4
Joined: Mon Aug 08, 2022 7:26 am

How to verify image signature before writing to ota partition?

Postby zhouzhendong » Wed Feb 22, 2023 4:00 am

I understand esp_ota_end() will verify the signature of the image in the partition in update.
However, is there a function I can call to verify an image file before writing it to partition?
My use case is: the image file is first uploaded and saved in an sdcard file system. Then I want to validate the image before writing to OTA partition (esp_ota_begin/esp_ota_write/esp_ota_end).
Thanks

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