[PATCH v6 0/4] Check codeSigning extended key usage extension

From: Lee, Chun-Yi
Date: Thu Apr 29 2021 - 03:30:09 EST

NIAP PP_OS certification requests that the OS shall validate the
CodeSigning extended key usage extension field for integrity
verifiction of exectable code:


This patchset adds the logic for parsing the codeSigning EKU extension
field in X.509. And checking the CodeSigning EKU when verifying
signature of kernel module or kexec PE binary in PKCS#7.

- Add more length checking when parsing extKeyUsage and EKU's OID blob.
- Add 'usage' parameter to the comment of pkcs7_validate_trust function.

Fixed the wording in module-signing.rst.

Fixed the wording in patch description.

- Add codeSigning EKU to x509.genkey key generation config.
- Add openssl command option example for generating CodeSign EKU to
module-signing.rst document.

Changed the help wording in the Kconfig.

Lee, Chun-Yi (4):
X.509: Add CodeSigning extended key usage parsing
PKCS#7: Check codeSigning EKU for kernel module and kexec pe
modsign: Add codeSigning EKU when generating X.509 key generation
Documentation/admin-guide/module-signing.rst: add openssl command
option example for CodeSign EKU

Documentation/admin-guide/module-signing.rst | 6 +++++
certs/Makefile | 1 +
certs/system_keyring.c | 2 +-
crypto/asymmetric_keys/Kconfig | 9 +++++++
crypto/asymmetric_keys/pkcs7_trust.c | 37 +++++++++++++++++++++++++---
crypto/asymmetric_keys/x509_cert_parser.c | 24 ++++++++++++++++++
include/crypto/pkcs7.h | 3 ++-
include/crypto/public_key.h | 1 +
include/linux/oid_registry.h | 5 ++++
9 files changed, 83 insertions(+), 5 deletions(-)