mirror of
https://github.com/torvalds/linux.git
synced 2024-11-30 16:11:38 +00:00
2154aca214
Commite90886291c("certs: make system keyring depend on x509 parser") is not the right fix because x509_load_certificate_list() can be modular. The combination of CONFIG_SYSTEM_TRUSTED_KEYRING=y and CONFIG_X509_CERTIFICATE_PARSER=m still results in the following error: LD .tmp_vmlinux.kallsyms1 ld: certs/system_keyring.o: in function `load_system_certificate_list': system_keyring.c:(.init.text+0x8c): undefined reference to `x509_load_certificate_list' make: *** [Makefile:1169: vmlinux] Error 1 Fixes:e90886291c("certs: make system keyring depend on x509 parser") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Adam Borowski <kilobyte@angband.pl>
142 lines
5.4 KiB
Plaintext
142 lines
5.4 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
|
|
menu "Certificates for signature checking"
|
|
|
|
config MODULE_SIG_KEY
|
|
string "File name or PKCS#11 URI of module signing key"
|
|
default "certs/signing_key.pem"
|
|
depends on MODULE_SIG || (IMA_APPRAISE_MODSIG && MODULES)
|
|
help
|
|
Provide the file name of a private key/certificate in PEM format,
|
|
or a PKCS#11 URI according to RFC7512. The file should contain, or
|
|
the URI should identify, both the certificate and its corresponding
|
|
private key.
|
|
|
|
If this option is unchanged from its default "certs/signing_key.pem",
|
|
then the kernel will automatically generate the private key and
|
|
certificate as described in Documentation/admin-guide/module-signing.rst
|
|
|
|
choice
|
|
prompt "Type of module signing key to be generated"
|
|
depends on MODULE_SIG || (IMA_APPRAISE_MODSIG && MODULES)
|
|
help
|
|
The type of module signing key type to generate. This option
|
|
does not apply if a #PKCS11 URI is used.
|
|
|
|
config MODULE_SIG_KEY_TYPE_RSA
|
|
bool "RSA"
|
|
help
|
|
Use an RSA key for module signing.
|
|
|
|
config MODULE_SIG_KEY_TYPE_ECDSA
|
|
bool "ECDSA"
|
|
select CRYPTO_ECDSA
|
|
help
|
|
Use an elliptic curve key (NIST P384) for module signing. Consider
|
|
using a strong hash like sha256 or sha384 for hashing modules.
|
|
|
|
Note: Remove all ECDSA signing keys, e.g. certs/signing_key.pem,
|
|
when falling back to building Linux 5.14 and older kernels.
|
|
|
|
endchoice
|
|
|
|
config SYSTEM_TRUSTED_KEYRING
|
|
bool "Provide system-wide ring of trusted keys"
|
|
depends on KEYS
|
|
depends on ASYMMETRIC_KEY_TYPE
|
|
depends on X509_CERTIFICATE_PARSER = y
|
|
help
|
|
Provide a system keyring to which trusted keys can be added. Keys in
|
|
the keyring are considered to be trusted. Keys may be added at will
|
|
by the kernel from compiled-in data and from hardware key stores, but
|
|
userspace may only add extra keys if those keys can be verified by
|
|
keys already in the keyring.
|
|
|
|
Keys in this keyring are used by module signature checking.
|
|
|
|
config SYSTEM_TRUSTED_KEYS
|
|
string "Additional X.509 keys for default system keyring"
|
|
depends on SYSTEM_TRUSTED_KEYRING
|
|
help
|
|
If set, this option should be the filename of a PEM-formatted file
|
|
containing trusted X.509 certificates to be included in the default
|
|
system keyring. Any certificate used for module signing is implicitly
|
|
also trusted.
|
|
|
|
NOTE: If you previously provided keys for the system keyring in the
|
|
form of DER-encoded *.x509 files in the top-level build directory,
|
|
those are no longer used. You will need to set this option instead.
|
|
|
|
config SYSTEM_EXTRA_CERTIFICATE
|
|
bool "Reserve area for inserting a certificate without recompiling"
|
|
depends on SYSTEM_TRUSTED_KEYRING
|
|
help
|
|
If set, space for an extra certificate will be reserved in the kernel
|
|
image. This allows introducing a trusted certificate to the default
|
|
system keyring without recompiling the kernel.
|
|
|
|
config SYSTEM_EXTRA_CERTIFICATE_SIZE
|
|
int "Number of bytes to reserve for the extra certificate"
|
|
depends on SYSTEM_EXTRA_CERTIFICATE
|
|
default 4096
|
|
help
|
|
This is the number of bytes reserved in the kernel image for a
|
|
certificate to be inserted.
|
|
|
|
config SECONDARY_TRUSTED_KEYRING
|
|
bool "Provide a keyring to which extra trustable keys may be added"
|
|
depends on SYSTEM_TRUSTED_KEYRING
|
|
help
|
|
If set, provide a keyring to which extra keys may be added, provided
|
|
those keys are not blacklisted and are vouched for by a key built
|
|
into the kernel or already in the secondary trusted keyring.
|
|
|
|
config SYSTEM_BLACKLIST_KEYRING
|
|
bool "Provide system-wide ring of blacklisted keys"
|
|
depends on KEYS
|
|
help
|
|
Provide a system keyring to which blacklisted keys can be added.
|
|
Keys in the keyring are considered entirely untrusted. Keys in this
|
|
keyring are used by the module signature checking to reject loading
|
|
of modules signed with a blacklisted key.
|
|
|
|
config SYSTEM_BLACKLIST_HASH_LIST
|
|
string "Hashes to be preloaded into the system blacklist keyring"
|
|
depends on SYSTEM_BLACKLIST_KEYRING
|
|
help
|
|
If set, this option should be the filename of a list of hashes in the
|
|
form "<hash>", "<hash>", ... . This will be included into a C
|
|
wrapper to incorporate the list into the kernel. Each <hash> must be a
|
|
string starting with a prefix ("tbs" or "bin"), then a colon (":"), and
|
|
finally an even number of hexadecimal lowercase characters (up to 128).
|
|
Certificate hashes can be generated with
|
|
tools/certs/print-cert-tbs-hash.sh .
|
|
|
|
config SYSTEM_REVOCATION_LIST
|
|
bool "Provide system-wide ring of revocation certificates"
|
|
depends on SYSTEM_BLACKLIST_KEYRING
|
|
depends on PKCS7_MESSAGE_PARSER=y
|
|
help
|
|
If set, this allows revocation certificates to be stored in the
|
|
blacklist keyring and implements a hook whereby a PKCS#7 message can
|
|
be checked to see if it matches such a certificate.
|
|
|
|
config SYSTEM_REVOCATION_KEYS
|
|
string "X.509 certificates to be preloaded into the system blacklist keyring"
|
|
depends on SYSTEM_REVOCATION_LIST
|
|
help
|
|
If set, this option should be the filename of a PEM-formatted file
|
|
containing X.509 certificates to be included in the default blacklist
|
|
keyring.
|
|
|
|
config SYSTEM_BLACKLIST_AUTH_UPDATE
|
|
bool "Allow root to add signed blacklist keys"
|
|
depends on SYSTEM_BLACKLIST_KEYRING
|
|
depends on SYSTEM_DATA_VERIFICATION
|
|
help
|
|
If set, provide the ability to load new blacklist keys at run time if
|
|
they are signed and vouched by a certificate from the builtin trusted
|
|
keyring. The PKCS#7 signature of the description is set in the key
|
|
payload. Blacklist keys cannot be removed.
|
|
|
|
endmenu
|