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Re: Patch to support GELI passphrase passthrough

From: Andrei Borzenkov
Subject: Re: Patch to support GELI passphrase passthrough
Date: Wed, 22 Oct 2014 21:47:24 +0400

В Wed, 22 Oct 2014 13:12:32 -0400
Kris Moore <address@hidden> пишет:

> Hey, just a small patch to submit today. If you rather I send this to
> the bug tracker then I can do that also.
> This patch allows exporting the FreeBSD GELI passphrase to the kernel
> environment, which we will be doing in PC-BSD to avoid prompting for the
> passphrase a second time at bootup.

>    if (!grub_password_get (passphrase, MAX_PASSPHRASE))
>      return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
> +  /* Set the GELI passphrase to GRUB env, for passing to FreeBSD kernel */
> +  grub_env_set ("gelipassphrase", passphrase);
> +

If I read BSD loader correctly, this should be kFreeBSD.gelipassphrase.
Is geli freebsd-specific?

>    /* Calculate the PBKDF2 of the user supplied passphrase.  */
>    if (grub_le_to_cpu32 (header.niter) != 0)
>      {

It sounds more logical to export it after it has been verified?

I tried to find out about this "gelipassphrase" kernel variable but did
not find anything. Is it already used anywhere?

> Let me know if you have any suggestions or need any changes. I'm
> currently hacking on support for EFI framebuffer settings to be passed
> to FreeBSD kernel as well, will send patches once I get things working
> there.

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