On Thu, Dec 08, 2022 at 10:28:43AM +0900, Masahisa Kojima wrote:
On Thu, 8 Dec 2022 at 08:12, Stuart Yoder stuart.yoder@arm.com wrote:
On 12/7/22 12:49 AM, Ilias Apalodimas wrote:
Hi Stuart,
On Tue, 6 Dec 2022 at 19:58, Stuart Yoder stuart.yoder@arm.com wrote:
All,
I saw the meeting notes on the wiki:
Ilias: PKCS7, ACS, authenticated UEFI variables. U-Boot will not support all types of certificate, probably will break SIE ACS. Need a test using an unsupported certificate in dbx, try to boot, should be rejected by bootloader
Heinrich: edk2 will support all types. At least make sure we support the secure certificate types (e.g. not sha1) Action: Ilias to run SIE ACS on Synquacer, Vincent to follow up with Stuart
Currently the certificates used in the SIE ACS are all X.509, RSA2048, SHA256.
That is also what is reflected in the SCT public spec for the new secure boot tests: https://github.com/stuyod01/edk2-test/blob/secure-boot/uefi-sct/Doc/UEFI-SCT...
Ok thanks. As I said I'll try to run it on hardware and share the results
What certificate types will u-boot not support?
EFI_CERT_RSA2048_GUID, EFI_CERT_RSA2048_SHA256_GUID, EFI_CERT_SHA1_GUID, EFI_CERT_RSA2048_SHA_GUID, EFI_CERT_SHA224_GUID, EFI_CERT_SHA384_GUID, EFI_CERT_SHA512_GUID,
are currently unsupported. Keep in mind that if U-Boot finds any of those types in DBX, it will unconditionally reject images.
Of the various signature types that can be in db and dbx, the SIE ACS tests the following:
-for db siglists -for certificates: EFI_CERT_X509_GUID -for hashes of images: EFI_CERT_SHA256_GUID
-for dbx siglists -for revocations of certificates: EFI_CERT_X509_GUID -for revocations of certificates by hash: EFI_CERT_SHA256_GUID, EFI_CERT_SHA384_GUID, EFI_CERT_SHA512_GUID
It would be as follows according to [0]? EFI_CERT_SHA256_GUID -> EFI_CERT_X509_SHA256_GUID EFI_CERT_SHA384_GUID -> EFI_CERT_X509_SHA384_GUID EFI_CERT_SHA512_GUID -> EFI_CERT_X509_SHA512_GUID
If so, U-Boot supports these dbx siglists for revocation. EFI_CERT_X509_SHA256_GUID EFI_CERT_X509_SHA384_GUID EFI_CERT_X509_SHA512_GUID
That's right.
FYI, my pytest in U-Boot repository (test_efi_secboot/test_signed.py) covers all the cases:
-for dbx siglists -for revocations of certificates: EFI_CERT_X509_GUID
Test case 6b
-for revocations of certificates by hash: EFI_CERT_SHA256_GUID, EFI_CERT_SHA384_GUID, EFI_CERT_SHA512_GUID
Test case 4 and case 7
-for revocations of images by hash: EFI_CERT_SHA256_GUID
Test case 6c
-Takahiro Akashi
[0] https://github.com/stuyod01/edk2-test/blob/secure-boot/uefi-sct/Doc/UEFI-SCT...
Regards, Masahisa Kojima
-for revocations of images by hash: EFI_CERT_SHA256_GUIDThe reason for picking those is that those GUIDs are the only ones supported by the efitools used in generating test signature lists. Updating efitools with additional GUIDs was out of scope of what we were able to do.
So it would be nice if u-boot supported revocations of EFI_CERT_SHA384_GUID, EFI_CERT_SHA512_GUID.
Thanks, Stuart _______________________________________________ boot-architecture mailing list -- boot-architecture@lists.linaro.org To unsubscribe send an email to boot-architecture-leave@lists.linaro.org
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