[PATCH v5 07/16] efi_loader: image_loader: support image authentication
AKASHI Takahiro
takahiro.akashi at linaro.org
Tue Feb 25 07:57:39 CET 2020
On Tue, Feb 25, 2020 at 07:40:01AM +0100, Heinrich Schuchardt wrote:
> On 2/25/20 6:25 AM, AKASHI Takahiro wrote:
> > On Mon, Feb 24, 2020 at 07:29:17PM +0100, Heinrich Schuchardt wrote:
> > > On 1/28/20 9:25 AM, AKASHI Takahiro wrote:
> > > > With this commit, image validation can be enforced, as UEFI specification
> > > > section 32.5 describes, if CONFIG_EFI_SECURE_BOOT is enabled.
> > > >
> > > > Currently we support
> > > > * authentication based on db and dbx,
> > > > so dbx-validated image will always be rejected.
> > > > * following signature types:
> > > > EFI_CERT_SHA256_GUID (SHA256 digest for unsigned images)
> > > > EFI_CERT_X509_GUID (x509 certificate for signed images)
> > > > Timestamp-based certificate revocation is not supported here.
> > > >
> > > > Internally, authentication data is stored in one of certificates tables
> > > > of PE image (See efi_image_parse()) and will be verified by
> > > > efi_image_authenticate() before loading a given image.
> > > >
> > > > It seems that UEFI specification defines the verification process
> > > > in a bit ambiguous way. I tried to implement it as closely to as
> > > > EDK2 does.
> > > >
> > > > Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
> > >
> > > According to git bisect this patch breaks the test
> > > test/py/tests/test_efi_fit.py.
> >
> > This error only occurs on "compressed" FIT images. While I'm not sure
> > whether it is directly related to efi support in bootm or not, I've
> > fixed it any way.
>
> Hello Takahiro,
>
> where can I find the fix?
Only in my local repository.
Since I'm running Travis CI now, I will post a new version
once the test is completed AND if you have no more comments
on my v5.
Thanks,
-Takahiro Akashi
> Best regards
>
> Heinrich
>
> >
> > Thanks,
> > -Takahiro Akashi
> >
> >
> > > Best regards
> > >
> > > Heinrich
>
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