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| author | David Woodhouse <David.Woodhouse@intel.com> | 2015-07-20 23:16:30 +0300 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2015-08-07 18:26:14 +0300 |
| commit | 1329e8cc69b93a0b1bc6d197b30dcff628c18dbf (patch) | |
| tree | c468b5fe99777d0e5072b1bc41f43ef47253cf8e /kernel/Makefile | |
| parent | 19e91b69d77bab16405cc284b451378e89a4110c (diff) | |
| download | linux-1329e8cc69b93a0b1bc6d197b30dcff628c18dbf.tar.xz | |
modsign: Extract signing cert from CONFIG_MODULE_SIG_KEY if needed
Where an external PEM file or PKCS#11 URI is given, we can get the cert
from it for ourselves instead of making the user drop signing_key.x509
in place for us.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'kernel/Makefile')
| -rw-r--r-- | kernel/Makefile | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 2c937ace292e..fa2f8b84b18a 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -210,5 +210,43 @@ x509.genkey: @echo >>x509.genkey "keyUsage=digitalSignature" @echo >>x509.genkey "subjectKeyIdentifier=hash" @echo >>x509.genkey "authorityKeyIdentifier=keyid" +else +# For external (PKCS#11 or PEM) key, we need to obtain the certificate from +# CONFIG_MODULE_SIG_KEY automatically. +quiet_cmd_extract_der = CERT_DER $(2) + cmd_extract_der = scripts/extract-cert "$(2)" signing_key.x509 + +# CONFIG_MODULE_SIG_KEY is either a PKCS#11 URI or a filename. It is +# surrounded by quotes, and may contain spaces. To strip the quotes +# with $(patsubst) we need to turn the spaces into something else. +# And if it's a filename, those spaces need to be escaped as '\ ' in +# order to use it in dependencies or $(wildcard). +space := +space += +space_escape := %%%SPACE%%% +X509_SOURCE_temp := $(subst $(space),$(space_escape),$(CONFIG_MODULE_SIG_KEY)) +# We need this to check for absolute paths or PKCS#11 URIs. +X509_SOURCE_ONEWORD := $(patsubst "%",%,$(X509_SOURCE_temp)) +# This is the actual source filename/URI without the quotes +X509_SOURCE := $(subst $(space_escape),$(space),$(X509_SOURCE_ONEWORD)) +# This\ version\ with\ spaces\ escaped\ for\ $(wildcard)\ and\ dependencies +X509_SOURCE_ESCAPED := $(subst $(space_escape),\$(space),$(X509_SOURCE_ONEWORD)) + +ifeq ($(patsubst pkcs11:%,%,$(X509_SOURCE_ONEWORD)),$(X509_SOURCE_ONEWORD)) +# If it's a filename, depend on it. +X509_DEP := $(X509_SOURCE_ESCAPED) +ifeq ($(patsubst /%,%,$(X509_SOURCE_ONEWORD)),$(X509_SOURCE_ONEWORD)) +ifeq ($(wildcard $(X509_SOURCE_ESCAPED)),) +ifneq ($(wildcard $(srctree)/$(X509_SOURCE_ESCAPED)),) +# Non-absolute filename, found in source tree and not build tree +X509_SOURCE := $(srctree)/$(X509_SOURCE) +X509_DEP := $(srctree)/$(X509_SOURCE_ESCAPED) +endif +endif +endif +endif + +signing_key.x509: scripts/extract-cert include/config/module/sig/key.h $(X509_DEP) + $(call cmd,extract_der,$(X509_SOURCE)) endif endif |