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2017-07-14modsign: add markers to endif-statements in certs/MakefileJarkko Sakkinen
It's a bit hard for eye to track certs/Makefile if you are not accustomed to it. This commit adds comments to key endif statements in order to help to keep the context while reading this file. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-04-03KEYS: Add a system blacklist keyringDavid Howells
Add the following: (1) A new system keyring that is used to store information about blacklisted certificates and signatures. (2) A new key type (called 'blacklist') that is used to store a blacklisted hash in its description as a hex string. The key accepts no payload. (3) The ability to configure a list of blacklisted hashes into the kernel at build time. This is done by setting CONFIG_SYSTEM_BLACKLIST_HASH_LIST to the filename of a list of hashes that are in the form: "<hash>", "<hash>", ..., "<hash>" where each <hash> is a hex string representation of the hash and must include all necessary leading zeros to pad the hash to the right size. The above are enabled with CONFIG_SYSTEM_BLACKLIST_KEYRING. Once the kernel is booted, the blacklist keyring can be listed: root@andromeda ~]# keyctl show %:.blacklist Keyring 723359729 ---lswrv 0 0 keyring: .blacklist 676257228 ---lswrv 0 0 \_ blacklist: 123412341234c55c1dcc601ab8e172917706aa32fb5eaf826813547fdf02dd46 The blacklist cannot currently be modified by userspace, but it will be possible to load it, for example, from the UEFI blacklist database. A later commit will make it possible to load blacklisted asymmetric keys in here too. Signed-off-by: David Howells <dhowells@redhat.com>
2016-02-26modsign: hide openssl output in silent buildsArnd Bergmann
When a user calls 'make -s', we can assume they don't want to see any output except for warnings and errors, but instead they see this for a warning free build: ### ### Now generating an X.509 key pair to be used for signing modules. ### ### If this takes a long time, you might wish to run rngd in the ### background to keep the supply of entropy topped up. It ### needs to be run as root, and uses a hardware random ### number generator if one is available. ### Generating a 4096 bit RSA private key .................................................................................................................................................................................................................................++ ..............................................................................................................................++ writing new private key to 'certs/signing_key.pem' ----- ### ### Key pair generated. ### The output can confuse simple build testing scripts that just check for an empty build log. This patch silences all the output: - "echo" is changed to "@$(kecho)", which is dropped when "-s" gets passed - the openssl command itself is only printed with V=1, using the $(Q) macro - The output of openssl gets redirected to /dev/null on "-s" builds. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David Howells <dhowells@redhat.com>
2015-08-14modsign: Handle signing key in source treeDavid Woodhouse
Since commit 1329e8cc69 ("modsign: Extract signing cert from CONFIG_MODULE_SIG_KEY if needed"), the build system has carefully coped with the signing key being specified as a relative path in either the source or or the build trees. However, the actual signing of modules has not worked if the filename is relative to the source tree. Fix that by moving the config_filename helper into scripts/Kbuild.include so that it can be used from elsewhere, and then using it in the top-level Makefile to find the signing key file. Kill the intermediate $(MODPUBKEY) and $(MODSECKEY) variables too, while we're at it. There's no need for them. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: David Howells <dhowells@redhat.com>
2015-08-14modsign: Use if_changed rule for extracting cert from module signing keyDavid Woodhouse
We couldn't use if_changed for this before, because it didn't live in the kernel/ directory so we couldn't add it to $(targets). It was easier just to leave it as it was. Now it's in the certs/ directory we can use if_changed, the same as we do for the trusted certificate list. Aside from making things consistent, this means we don't need to depend explicitly on the include/config/module/sig/key.h file. And we also get to automatically do the right thing and re-extract the cert if the user does odd things like using a relative filename and then playing silly buggers with adding/removing that file in both the source and object trees. We always favour the one in the object tree if it exists, and now we'll correctly re-extract the cert when it changes. Previously we'd *only* re-extract the cert if the config option changed, even if the actual file we're using did change. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: David Howells <dhowells@redhat.com>
2015-08-14Move certificate handling to its own directoryDavid Howells
Move certificate handling out of the kernel/ directory and into a certs/ directory to get all the weird stuff in one place and move the generated signing keys into this directory. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: David Woodhouse <David.Woodhouse@intel.com>