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[ Upstream commit d1f044103dad70c1cec0a8f3abdf00834fec8b98 ] Add a new Kconfig option called SYSTEM_REVOCATION_KEYS. If set, this option should be the filename of a PEM-formated file containing X.509 certificates to be included in the default blacklist keyring. DH Changes: - Make the new Kconfig option depend on SYSTEM_REVOCATION_LIST. - Fix SYSTEM_REVOCATION_KEYS=n, but CONFIG_SYSTEM_REVOCATION_LIST=y[1][2]. - Use CONFIG_SYSTEM_REVOCATION_LIST for extract-cert[3]. - Use CONFIG_SYSTEM_REVOCATION_LIST for revocation_certificates.o[3]. Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com> Acked-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: David Howells <dhowells@redhat.com> cc: Randy Dunlap <rdunlap@infradead.org> cc: keyrings@vger.kernel.org Link: https://lore.kernel.org/r/e1c15c74-82ce-3a69-44de-a33af9b320ea@infradead.org/ [1] Link: https://lore.kernel.org/r/20210303034418.106762-1-eric.snowberg@oracle.com/ [2] Link: https://lore.kernel.org/r/20210304175030.184131-1-eric.snowberg@oracle.com/ [3] Link: https://lore.kernel.org/r/20200930201508.35113-3-eric.snowberg@oracle.com/ Link: https://lore.kernel.org/r/20210122181054.32635-4-eric.snowberg@oracle.com/ # v5 Link: https://lore.kernel.org/r/161428673564.677100.4112098280028451629.stgit@warthog.procyon.org.uk/ Link: https://lore.kernel.org/r/161433312452.902181.4146169951896577982.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/161529606657.163428.3340689182456495390.stgit@warthog.procyon.org.uk/ # v3 Signed-off-by: Sasha Levin <sashal@kernel.org>
104 lines
4.1 KiB
Plaintext
104 lines
4.1 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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menu "Certificates for signature checking"
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config MODULE_SIG_KEY
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string "File name or PKCS#11 URI of module signing key"
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default "certs/signing_key.pem"
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depends on MODULE_SIG
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help
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Provide the file name of a private key/certificate in PEM format,
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or a PKCS#11 URI according to RFC7512. The file should contain, or
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the URI should identify, both the certificate and its corresponding
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private key.
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If this option is unchanged from its default "certs/signing_key.pem",
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then the kernel will automatically generate the private key and
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certificate as described in Documentation/admin-guide/module-signing.rst
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config SYSTEM_TRUSTED_KEYRING
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bool "Provide system-wide ring of trusted keys"
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depends on KEYS
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depends on ASYMMETRIC_KEY_TYPE
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help
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Provide a system keyring to which trusted keys can be added. Keys in
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the keyring are considered to be trusted. Keys may be added at will
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by the kernel from compiled-in data and from hardware key stores, but
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userspace may only add extra keys if those keys can be verified by
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keys already in the keyring.
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Keys in this keyring are used by module signature checking.
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config SYSTEM_TRUSTED_KEYS
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string "Additional X.509 keys for default system keyring"
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depends on SYSTEM_TRUSTED_KEYRING
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help
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If set, this option should be the filename of a PEM-formatted file
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containing trusted X.509 certificates to be included in the default
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system keyring. Any certificate used for module signing is implicitly
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also trusted.
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NOTE: If you previously provided keys for the system keyring in the
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form of DER-encoded *.x509 files in the top-level build directory,
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those are no longer used. You will need to set this option instead.
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config SYSTEM_EXTRA_CERTIFICATE
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bool "Reserve area for inserting a certificate without recompiling"
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depends on SYSTEM_TRUSTED_KEYRING
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help
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If set, space for an extra certificate will be reserved in the kernel
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image. This allows introducing a trusted certificate to the default
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system keyring without recompiling the kernel.
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config SYSTEM_EXTRA_CERTIFICATE_SIZE
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int "Number of bytes to reserve for the extra certificate"
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depends on SYSTEM_EXTRA_CERTIFICATE
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default 4096
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help
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This is the number of bytes reserved in the kernel image for a
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certificate to be inserted.
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config SECONDARY_TRUSTED_KEYRING
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bool "Provide a keyring to which extra trustable keys may be added"
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depends on SYSTEM_TRUSTED_KEYRING
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help
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If set, provide a keyring to which extra keys may be added, provided
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those keys are not blacklisted and are vouched for by a key built
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into the kernel or already in the secondary trusted keyring.
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config SYSTEM_BLACKLIST_KEYRING
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bool "Provide system-wide ring of blacklisted keys"
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depends on KEYS
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help
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Provide a system keyring to which blacklisted keys can be added.
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Keys in the keyring are considered entirely untrusted. Keys in this
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keyring are used by the module signature checking to reject loading
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of modules signed with a blacklisted key.
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config SYSTEM_BLACKLIST_HASH_LIST
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string "Hashes to be preloaded into the system blacklist keyring"
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depends on SYSTEM_BLACKLIST_KEYRING
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help
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If set, this option should be the filename of a list of hashes in the
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form "<hash>", "<hash>", ... . This will be included into a C
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wrapper to incorporate the list into the kernel. Each <hash> should
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be a string of hex digits.
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config SYSTEM_REVOCATION_LIST
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bool "Provide system-wide ring of revocation certificates"
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depends on SYSTEM_BLACKLIST_KEYRING
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depends on PKCS7_MESSAGE_PARSER=y
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help
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If set, this allows revocation certificates to be stored in the
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blacklist keyring and implements a hook whereby a PKCS#7 message can
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be checked to see if it matches such a certificate.
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config SYSTEM_REVOCATION_KEYS
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string "X.509 certificates to be preloaded into the system blacklist keyring"
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depends on SYSTEM_REVOCATION_LIST
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help
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If set, this option should be the filename of a PEM-formatted file
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containing X.509 certificates to be included in the default blacklist
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keyring.
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endmenu
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