[v4,00/12] efi_loader: rework/improve UEFI secure boot code

This is a respin of Takahiro's patch series adding a defined time stamp
for time authenticated variables by calling sign-efi-sig-list with -t in
patches 10 - 12.

The original patch 01 of version 3 has been obsoleted by

    lib/crypto: use qualified path for x509_parser.h
    https://lists.denx.de/pipermail/u-boot/2020-July/419214.html

v4 (Jul 11th, 2020)
* remove obsolete patch 01/13 of v3
* call sign-efi-sig-list with -t

v3 (Jul 8, 2020)
* rebased to Heinrich's (current) efi-2020-10-rc1
* removed already-merged commits
* include pylint fixes (patch#8, #9 and #10-#13)
* print time64_t in "0x%llx" format (patch#4)
* make a small change on a description about efi_hash_regions() (patch#5)

v2 (Jun 9, 2020)
* on top of v2020.07-rc4
* add patch#1,#2 to remove unnecessary hacks in pytest
* use EFI_PRINT() instead of debug() everywhere (patch#3-#5)
* fix a verification logic so that we should reject an image if, at least,
  one of signaures be verified by dbx. New efi_signature_verify_one() has
  a main role. (patch#10)
* use "llu" format instead of "llx" to print out the revocation time
  (patch#10)
* add some description about verification logic against multiple signatures
  (patch#11)

v1 (May 29, 2020)

* initial release

*** BLURB HERE ***

AKASHI Takahiro (12):
  efi_loader: image_loader: add a check against certificate type of
    authenticode
  efi_loader: image_loader: retrieve authenticode only if it exists
  efi_loader: signature: fix a size check against revocation list
  efi_loader: signature: make efi_hash_regions more generic
  efi_loader: image_loader: verification for all signatures should pass
  efi_loader: image_loader: add digest-based verification for signed
    image
  test/py: efi_secboot: apply autopep8
  test/py: efi_secboot: more fixes against pylint
  test/py: efi_secboot: split "signed image" test case-1 into two cases
  test/py: efi_secboot: add a test against certificate revocation
  test/py: efi_secboot: add a test for multiple signatures
  test/py: efi_secboot: add a test for verifying with digest of signed
    image

 include/efi_loader.h                          |  15 +-
 lib/efi_loader/efi_image_loader.c             | 162 +++++--
 lib/efi_loader/efi_signature.c                | 435 +++++++++---------
 test/py/tests/test_efi_secboot/conftest.py    | 104 +++--
 test/py/tests/test_efi_secboot/defs.py        |  14 +-
 .../py/tests/test_efi_secboot/test_authvar.py |  92 ++--
 test/py/tests/test_efi_secboot/test_signed.py | 206 +++++++--
 .../tests/test_efi_secboot/test_unsigned.py   |  66 +--
 8 files changed, 677 insertions(+), 417 deletions(-)

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2.27.0