diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Makefile | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 08ba8a6abd1c..58c6f111267e 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -132,3 +132,52 @@ quiet_cmd_timeconst = TIMEC $@ targets += timeconst.h $(obj)/timeconst.h: $(src)/timeconst.pl FORCE $(call if_changed,timeconst) + +ifeq ($(CONFIG_MODULE_SIG),y) + +############################################################################### +# +# If module signing is requested, say by allyesconfig, but a key has not been +# supplied, then one will need to be generated to make sure the build does not +# fail and that the kernel may be used afterwards. +# +############################################################################### +signing_key.priv signing_key.x509: x509.genkey + @echo "###" + @echo "### Now generating an X.509 key pair to be used for signing modules." + @echo "###" + @echo "### If this takes a long time, you might wish to run rngd in the" + @echo "### background to keep the supply of entropy topped up. It" + @echo "### needs to be run as root, and should use a hardware random" + @echo "### number generator if one is available, eg:" + @echo "###" + @echo "### rngd -r /dev/hwrandom" + @echo "###" + openssl req -new -nodes -utf8 -sha1 -days 36500 -batch \ + -x509 -config x509.genkey \ + -outform DER -out signing_key.x509 \ + -keyout signing_key.priv + @echo "###" + @echo "### Key pair generated." + @echo "###" + +x509.genkey: + @echo Generating X.509 key generation config + @echo >x509.genkey "[ req ]" + @echo >>x509.genkey "default_bits = 4096" + @echo >>x509.genkey "distinguished_name = req_distinguished_name" + @echo >>x509.genkey "prompt = no" + @echo >>x509.genkey "x509_extensions = myexts" + @echo >>x509.genkey + @echo >>x509.genkey "[ req_distinguished_name ]" + @echo >>x509.genkey "O = Magrathea" + @echo >>x509.genkey "CN = Glacier signing key" + @echo >>x509.genkey "emailAddress = slartibartfast@magrathea.h2g2" + @echo >>x509.genkey + @echo >>x509.genkey "[ myexts ]" + @echo >>x509.genkey "basicConstraints=critical,CA:FALSE" + @echo >>x509.genkey "keyUsage=digitalSignature" + @echo >>x509.genkey "subjectKeyIdentifier=hash" + @echo >>x509.genkey "authorityKeyIdentifier=keyid" +endif +CLEAN_FILES += signing_key.priv signing_key.x509 x509.genkey |