diff mbox series

[7/7] verifiers: Verify after decompression

Message ID 20240313150748.791236-8-ross.lagerwall@citrix.com (mailing list archive)
State New
Headers show
Series GRUB: Supporting Secure Boot of xen.gz | expand

Commit Message

Ross Lagerwall March 13, 2024, 3:07 p.m. UTC
It is convenient and common to have binaries stored in gzip archives
(e.g. xen.gz). Verification should be run after decompression rather
than before so reorder the file filter list as appropriate.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
---
 include/grub/file.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Michael Chang March 15, 2024, 3:50 a.m. UTC | #1
On Wed, Mar 13, 2024 at 03:07:48PM +0000, Ross Lagerwall via Grub-devel wrote:
> It is convenient and common to have binaries stored in gzip archives
> (e.g. xen.gz). Verification should be run after decompression rather
> than before so reorder the file filter list as appropriate.

The proposed change would result in the disruption of the tpm and pgp
clients within the verifier framework. Specifically, the tpm pcr
prediction software relies on the integrity of raw files rather than
decompressed ones. Additionally, pgp detached signatures are designed to
target original files, thus necessitating the current structure to
maintain functionality.

Thanks,
Michael

> 
> Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
> ---
>  include/grub/file.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/grub/file.h b/include/grub/file.h
> index a5bf3a792d6f..a1ef3582bc7b 100644
> --- a/include/grub/file.h
> +++ b/include/grub/file.h
> @@ -182,10 +182,10 @@ extern grub_disk_read_hook_t EXPORT_VAR(grub_file_progress_hook);
>  /* Filters with lower ID are executed first.  */
>  typedef enum grub_file_filter_id
>    {
> -    GRUB_FILE_FILTER_VERIFY,
>      GRUB_FILE_FILTER_GZIO,
>      GRUB_FILE_FILTER_XZIO,
>      GRUB_FILE_FILTER_LZOPIO,
> +    GRUB_FILE_FILTER_VERIFY,
>      GRUB_FILE_FILTER_MAX,
>      GRUB_FILE_FILTER_COMPRESSION_FIRST = GRUB_FILE_FILTER_GZIO,
>      GRUB_FILE_FILTER_COMPRESSION_LAST = GRUB_FILE_FILTER_LZOPIO,
> -- 
> 2.43.0
> 
> 
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel
diff mbox series

Patch

diff --git a/include/grub/file.h b/include/grub/file.h
index a5bf3a792d6f..a1ef3582bc7b 100644
--- a/include/grub/file.h
+++ b/include/grub/file.h
@@ -182,10 +182,10 @@  extern grub_disk_read_hook_t EXPORT_VAR(grub_file_progress_hook);
 /* Filters with lower ID are executed first.  */
 typedef enum grub_file_filter_id
   {
-    GRUB_FILE_FILTER_VERIFY,
     GRUB_FILE_FILTER_GZIO,
     GRUB_FILE_FILTER_XZIO,
     GRUB_FILE_FILTER_LZOPIO,
+    GRUB_FILE_FILTER_VERIFY,
     GRUB_FILE_FILTER_MAX,
     GRUB_FILE_FILTER_COMPRESSION_FIRST = GRUB_FILE_FILTER_GZIO,
     GRUB_FILE_FILTER_COMPRESSION_LAST = GRUB_FILE_FILTER_LZOPIO,