https://community.nxp.com/t5/i-MX-Processors/Padding-and-Signing-M7-Image-for-Secure-Boot/m-p/2197201#M241860 <P>Hi,</P> <P>I've sent you with a reference.</P> <P>&nbsp;</P> <P>Regards</P> <P>Harvey</P> Mon, 03 Nov 2025 04:40:43 GMT Harvey021 2025-11-03T04:40:43Z https://community.nxp.com/t5/i-MX-Processors/Padding-and-Signing-M7-Image-for-Secure-Boot/m-p/2195029#M241751 <P>Hi,</P><P>I'm currently working on implementing secure boot for the i.MX8M Plus. Section 3 of the&nbsp;<A href="https://github.com/nxp-imx/uboot-imx/blob/lf_v2022.04/doc/imx/habv4/guides/mx8m_secure_boot.txt" target="_self">mx8m_secure_boot.txt</A>&nbsp;document provides an example for signing the Linux kernel image, which has been helpful.</P><P>Now, I'm focusing on signing the M7 firmware image. To proceed, I need to determine the appropriate pad size from the image header—similar to the method described in section 3.1 for the kernel image—so that the M7 image can be correctly signed.</P><P>Any guidance on how to extract the pad size from the M7 image header would be greatly appreciated. Additionally, if there are any documents or references specifically related to signing the M7 image, please share them.</P><P>&nbsp;</P><P>Regards,</P><P>Kartheek</P> Wed, 29 Oct 2025 09:55:20 GMT https://community.nxp.com/t5/i-MX-Processors/Padding-and-Signing-M7-Image-for-Secure-Boot/m-p/2195029#M241751 kartheek 2025-10-29T09:55:20Z https://community.nxp.com/t5/i-MX-Processors/Padding-and-Signing-M7-Image-for-Secure-Boot/m-p/2197201#M241860 <P>Hi,</P> <P>I've sent you with a reference.</P> <P>&nbsp;</P> <P>Regards</P> <P>Harvey</P> Mon, 03 Nov 2025 04:40:43 GMT https://community.nxp.com/t5/i-MX-Processors/Padding-and-Signing-M7-Image-for-Secure-Boot/m-p/2197201#M241860 Harvey021 2025-11-03T04:40:43Z