On Thu, May 20, 2021 at 04:06:12AM +0200, Heinrich Schuchardt wrote: > On 5/10/21 10:19 AM, AKASHI Takahiro wrote: > > It will probably be a common error case that a certificate (public key) > > is not provided by the system while capsule authentication is enabled. > > So add a debug message. > > > > Signed-off-by: AKASHI Takahiro <[email protected]> > > --- > > lib/efi_loader/efi_capsule.c | 4 +++- > > 1 file changed, 3 insertions(+), 1 deletion(-) > > > > diff --git a/lib/efi_loader/efi_capsule.c b/lib/efi_loader/efi_capsule.c > > index 90893f85e22c..84ddaf50d13f 100644 > > --- a/lib/efi_loader/efi_capsule.c > > +++ b/lib/efi_loader/efi_capsule.c > > @@ -316,8 +316,10 @@ efi_status_t efi_capsule_authenticate(const void > > *capsule, efi_uintn_t capsule_s > > } > > > > ret = efi_get_public_key_data(&fdt_pkey, &pkey_len); > > - if (ret < 0) > > + if (ret < 0) { > > + debug("Public key/certificate not found\n"); > > Currently the only implementation of efi_get_public_key_data() actually > providing keys is the one in board/emulation/common/qemu_capsule.c where > the user has to manually upload the esl file. > > For future implementation it is preferable to build the public key data > into the U-Boot binary. If it is part of the build process then the only > error that could come up is that the public key data has the wrong format.
Now Ilias posted a patch to embed a public key in the U-Boot binary. But it won't be the only solution in the future and the system owners may want to provide a key in their own way; hence, it might not be "part of build process." So I think that adding a message is still valid, even it should be treated as an error message instead of a debug message to warn "users". -Takahiro Akashi > If we are using the weak implementation of efi_get_public_key_data() in > lib/efi_loader/efi_capsule.cwith CONFIG_EFI_CAPSULE_AUTHENTICATE=y, the > system is misconfigured. Do we need that weak implementation at all? I > would prefer to remove to get a build error. > > I suggest that you add a log_err() message with above text into the > board/emulation/common/qemu_capsule.c implementation of > efi_get_public_key_data(). This way the user will see that he forgot a step. > > Best regards > > Heinrich > > > goto out; > > + } > > > > pkey = malloc(pkey_len); > > if (!pkey) > > >
