On Fri, Jul 16, 2021 at 12:12:41PM +0530, Pintu Agarwal wrote:

Hi,

Our ARM32 Linux embedded system consists of these:
* Linux Kernel: 4.14
* Processor: Qualcomm Arm32 Cortex-A7
* Storage: NAND 512MB
* Platform: Simple busybox
* Filesystem: UBIFS, Squashfs
* Consists of nand raw partitions, squashfs ubi volumes.

My requirement:
To find the checksum of a real image in runtime which is flashed in an
MTD partition.

Try using the dm-verity module for ensuring that a block device really
is properly signed before mounting it.  That's what it was designed for
and is independent of the block device type.

good luck!

greg k-h

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