forked from Minki/linux
1329e8cc69
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>
253 lines
9.4 KiB
Makefile
253 lines
9.4 KiB
Makefile
#
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# Makefile for the linux kernel.
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#
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obj-y = fork.o exec_domain.o panic.o \
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cpu.o exit.o softirq.o resource.o \
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sysctl.o sysctl_binary.o capability.o ptrace.o user.o \
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signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
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extable.o params.o \
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kthread.o sys_ni.o nsproxy.o \
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notifier.o ksysfs.o cred.o reboot.o \
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async.o range.o smpboot.o
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obj-$(CONFIG_MULTIUSER) += groups.o
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ifdef CONFIG_FUNCTION_TRACER
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# Do not trace debug files and internal ftrace files
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CFLAGS_REMOVE_cgroup-debug.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)
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endif
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# cond_syscall is currently not LTO compatible
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CFLAGS_sys_ni.o = $(DISABLE_LTO)
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obj-y += sched/
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obj-y += locking/
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obj-y += power/
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obj-y += printk/
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obj-y += irq/
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obj-y += rcu/
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obj-y += livepatch/
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obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
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obj-$(CONFIG_FREEZER) += freezer.o
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obj-$(CONFIG_PROFILING) += profile.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-y += time/
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obj-$(CONFIG_FUTEX) += futex.o
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ifeq ($(CONFIG_COMPAT),y)
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obj-$(CONFIG_FUTEX) += futex_compat.o
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endif
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obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
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obj-$(CONFIG_SMP) += smp.o
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ifneq ($(CONFIG_SMP),y)
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obj-y += up.o
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endif
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obj-$(CONFIG_UID16) += uid16.o
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obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
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obj-$(CONFIG_MODULES) += module.o
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obj-$(CONFIG_MODULE_SIG) += module_signing.o
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obj-$(CONFIG_KALLSYMS) += kallsyms.o
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obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
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obj-$(CONFIG_KEXEC) += kexec.o
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obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
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obj-$(CONFIG_COMPAT) += compat.o
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obj-$(CONFIG_CGROUPS) += cgroup.o
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obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
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obj-$(CONFIG_CPUSETS) += cpuset.o
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obj-$(CONFIG_UTS_NS) += utsname.o
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obj-$(CONFIG_USER_NS) += user_namespace.o
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obj-$(CONFIG_PID_NS) += pid_namespace.o
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obj-$(CONFIG_IKCONFIG) += configs.o
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obj-$(CONFIG_SMP) += stop_machine.o
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obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
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obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
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obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
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obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
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obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
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obj-$(CONFIG_GCOV_KERNEL) += gcov/
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obj-$(CONFIG_KPROBES) += kprobes.o
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obj-$(CONFIG_KGDB) += debug/
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obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
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obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
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obj-$(CONFIG_SECCOMP) += seccomp.o
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obj-$(CONFIG_RELAY) += relay.o
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obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
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obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
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obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
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obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
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obj-$(CONFIG_LATENCYTOP) += latencytop.o
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obj-$(CONFIG_BINFMT_ELF) += elfcore.o
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obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
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obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
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obj-$(CONFIG_FUNCTION_TRACER) += trace/
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obj-$(CONFIG_TRACING) += trace/
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obj-$(CONFIG_TRACE_CLOCK) += trace/
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obj-$(CONFIG_RING_BUFFER) += trace/
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obj-$(CONFIG_TRACEPOINTS) += trace/
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obj-$(CONFIG_IRQ_WORK) += irq_work.o
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obj-$(CONFIG_CPU_PM) += cpu_pm.o
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obj-$(CONFIG_BPF) += bpf/
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obj-$(CONFIG_PERF_EVENTS) += events/
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obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
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obj-$(CONFIG_PADATA) += padata.o
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obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
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obj-$(CONFIG_JUMP_LABEL) += jump_label.o
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obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
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obj-$(CONFIG_TORTURE_TEST) += torture.o
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$(obj)/configs.o: $(obj)/config_data.h
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# config_data.h contains the same information as ikconfig.h but gzipped.
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# Info from config_data can be extracted from /proc/config*
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targets += config_data.gz
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$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
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$(call if_changed,gzip)
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filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;")
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targets += config_data.h
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$(obj)/config_data.h: $(obj)/config_data.gz FORCE
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$(call filechk,ikconfiggz)
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###############################################################################
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#
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# Roll all the X.509 certificates that we can find together and pull them into
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# the kernel so that they get loaded into the system trusted keyring during
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# boot.
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#
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# We look in the source root and the build root for all files whose name ends
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# in ".x509". Unfortunately, this will generate duplicate filenames, so we
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# have make canonicalise the pathnames and then sort them to discard the
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# duplicates.
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#
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###############################################################################
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ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
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X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
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X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
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X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
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$(or $(realpath $(CERT)),$(CERT))))
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X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))
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ifeq ($(X509_CERTIFICATES),)
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$(warning *** No X.509 certificates found ***)
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endif
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ifneq ($(wildcard $(obj)/.x509.list),)
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ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
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$(warning X.509 certificate list changed to "$(X509_CERTIFICATES)" from "$(shell cat $(obj)/.x509.list)")
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$(shell rm $(obj)/.x509.list)
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endif
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endif
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kernel/system_certificates.o: $(obj)/x509_certificate_list
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quiet_cmd_x509certs = CERTS $@
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cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; $(kecho) " - Including cert $(X509)")
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targets += $(obj)/x509_certificate_list
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$(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
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$(call if_changed,x509certs)
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targets += $(obj)/.x509.list
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$(obj)/.x509.list:
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@echo $(X509_CERTIFICATES) >$@
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endif
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clean-files := x509_certificate_list .x509.list
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ifeq ($(CONFIG_MODULE_SIG),y)
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###############################################################################
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#
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# If module signing is requested, say by allyesconfig, but a key has not been
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# supplied, then one will need to be generated to make sure the build does not
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# fail and that the kernel may be used afterwards.
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#
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###############################################################################
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ifndef CONFIG_MODULE_SIG_HASH
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$(error Could not determine digest type to use from kernel config)
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endif
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# We do it this way rather than having a boolean option for enabling an
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# external private key, because 'make randconfig' might enable such a
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# boolean option and we unfortunately can't make it depend on !RANDCONFIG.
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ifeq ($(CONFIG_MODULE_SIG_KEY),"signing_key.priv")
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signing_key.priv signing_key.x509: x509.genkey
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@echo "###"
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@echo "### Now generating an X.509 key pair to be used for signing modules."
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@echo "###"
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@echo "### If this takes a long time, you might wish to run rngd in the"
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@echo "### background to keep the supply of entropy topped up. It"
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@echo "### needs to be run as root, and uses a hardware random"
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@echo "### number generator if one is available."
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@echo "###"
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openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
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-batch -x509 -config x509.genkey \
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-outform DER -out signing_key.x509 \
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-keyout signing_key.priv 2>&1
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@echo "###"
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@echo "### Key pair generated."
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@echo "###"
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x509.genkey:
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@echo Generating X.509 key generation config
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@echo >x509.genkey "[ req ]"
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@echo >>x509.genkey "default_bits = 4096"
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@echo >>x509.genkey "distinguished_name = req_distinguished_name"
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@echo >>x509.genkey "prompt = no"
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@echo >>x509.genkey "string_mask = utf8only"
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@echo >>x509.genkey "x509_extensions = myexts"
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@echo >>x509.genkey
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@echo >>x509.genkey "[ req_distinguished_name ]"
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@echo >>x509.genkey "#O = Unspecified company"
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@echo >>x509.genkey "CN = Build time autogenerated kernel key"
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@echo >>x509.genkey "#emailAddress = unspecified.user@unspecified.company"
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@echo >>x509.genkey
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@echo >>x509.genkey "[ myexts ]"
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@echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
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@echo >>x509.genkey "keyUsage=digitalSignature"
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@echo >>x509.genkey "subjectKeyIdentifier=hash"
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@echo >>x509.genkey "authorityKeyIdentifier=keyid"
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else
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# For external (PKCS#11 or PEM) key, we need to obtain the certificate from
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# CONFIG_MODULE_SIG_KEY automatically.
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quiet_cmd_extract_der = CERT_DER $(2)
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cmd_extract_der = scripts/extract-cert "$(2)" signing_key.x509
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# CONFIG_MODULE_SIG_KEY is either a PKCS#11 URI or a filename. It is
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# surrounded by quotes, and may contain spaces. To strip the quotes
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# with $(patsubst) we need to turn the spaces into something else.
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# And if it's a filename, those spaces need to be escaped as '\ ' in
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# order to use it in dependencies or $(wildcard).
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space :=
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space +=
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space_escape := %%%SPACE%%%
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X509_SOURCE_temp := $(subst $(space),$(space_escape),$(CONFIG_MODULE_SIG_KEY))
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# We need this to check for absolute paths or PKCS#11 URIs.
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X509_SOURCE_ONEWORD := $(patsubst "%",%,$(X509_SOURCE_temp))
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# This is the actual source filename/URI without the quotes
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X509_SOURCE := $(subst $(space_escape),$(space),$(X509_SOURCE_ONEWORD))
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# This\ version\ with\ spaces\ escaped\ for\ $(wildcard)\ and\ dependencies
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X509_SOURCE_ESCAPED := $(subst $(space_escape),\$(space),$(X509_SOURCE_ONEWORD))
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ifeq ($(patsubst pkcs11:%,%,$(X509_SOURCE_ONEWORD)),$(X509_SOURCE_ONEWORD))
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# If it's a filename, depend on it.
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X509_DEP := $(X509_SOURCE_ESCAPED)
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ifeq ($(patsubst /%,%,$(X509_SOURCE_ONEWORD)),$(X509_SOURCE_ONEWORD))
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ifeq ($(wildcard $(X509_SOURCE_ESCAPED)),)
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ifneq ($(wildcard $(srctree)/$(X509_SOURCE_ESCAPED)),)
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# Non-absolute filename, found in source tree and not build tree
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X509_SOURCE := $(srctree)/$(X509_SOURCE)
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X509_DEP := $(srctree)/$(X509_SOURCE_ESCAPED)
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endif
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endif
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endif
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endif
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signing_key.x509: scripts/extract-cert include/config/module/sig/key.h $(X509_DEP)
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$(call cmd,extract_der,$(X509_SOURCE))
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endif
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endif
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