On 5/29/20 8:41 AM, AKASHI Takahiro wrote: > In case that a type of certificate in "db" or "dbx" is > EFI_CERT_X509_SHA256_GUID, it is actually not a certificate which contains > a public key for RSA decryption, but a digest of image to be loaded. > If the value matches to a value calculated from a given binary image, it is > granted for loading. > > With this patch, common digest check code, which used to be used for > unsigned image verification, will be extracted from > efi_signature_verify_with_sigdb() into efi_signature_lookup_digest(), and > extra step for digest check will be added to efi_image_authenticate().
Could you, please, add comments in the code describing this process flow. Best regards Heinrich
