How to boot into a luks encrypted rootfs partition from initramfs on i.MX6ULZ?

[skwang6272]

Hi everyone, 

I am trying to do disk encryption on i.MX6UL. The device is USB armory II. It has DCP and no CAAM.

This is my plan：

1、Two partitions. One for /boot, one for rootfs. Bootloader and kernel are stored in /boot and they are in plain text. The rootfs is encrypted by LUKS(DM-crpty).

2、Configure initramfs in the kernel. During the boot process, decrypt the encrypted rootfs and mount the root directory automatically.

3、LUKS uses file as key. At the same time this key file is encrypted with DCP.

Here is my question:

1、How to install the system on an already partitioned SD card？How to configure the encrypted file system？

2、How to configure initramfs to encrypt and load rootfs automatically?

I am just new to embedded development. Any suggestions, documentation and tutorials are welcome.

I have searched for similar issues

How to boot into a luks encrypted rootfs partition from initramfs on imx6 quad?

The document "Root filesystem encryption using DM-Crypt"  looks useful but I don't have permission to access it.

Thanks!

[beestarbush]

Hello,

I have the AN12714 and IMX Linux User Guide (IMXLUG_6.6.23_2.0.0) but would like to have a look into "Root filesystem encryption using DM-Crypt". Could you provide me this?

[r1cebank]

I am having the same question, is it possible to send me the same documents?

[Yuri]

@r1cebank 

Done!

~Yuri.

[gulsrb]

Dear Mr. Yuri
It would be very much appreciated if you could also provide me with a copy of the "Root filesystem encryption using DM-Crypt" document.
Best regards,
Aleksandar

[d1ken]

Hi

I am working on rootfs encryption for i.MX7D.

Could you give me access to the "Root filesystem encryption using DM-Crypt" document?

Thanks.

[d1ken]

Hi

I am working on rootfs encryption for i.MX7D.

Could you give me access to the "Root filesystem encryption using DM-Crypt" document?

Thanks.

[d1ken]

Hi

I am working on rootfs encryption for i.MX7D.

Could you give me access to the "Root filesystem encryption using DM-Crypt" document?

Thanks.

[Yuri]

@d1ken 
Hello,

    In addition to AN12714 (i.MX Encrypted Storage Using CAAM Secure Keys) use
section 10.5 (Disk encryption acceleration) of i.MX Linux User's Guide.

https://www.nxp.com/webapp/Download?colCode=AN12714

https://www.nxp.com/docs/en/user-guide/IMX_LINUX_USERS_GUIDE.pdf

 For specific customer's cases (OS releases) NXP Pro Support may be involved.

Regards,
Yuri.

[skwang6272]

Hi,

   I have received it. Thank you very much!