cd /usr/src/linux-headers-$(uname -r)/certs
# Create a config file for the certificate
cat <<EOF > x509.genkey
[ req ]
default_bits = 4096
distinguished_name = req_distinguished_name
prompt = no
x509_extensions = myexts
[ req_distinguished_name ]
CN = Modules
[ myexts ]
basicConstraints=critical,CA:FALSE
keyUsage=digitalSignature
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid
EOF
# Generate the key and certificate
openssl req -new -nodes -utf8 -sha512 -days 36500 -batch \
-x509 -config x509.genkey -outform DER \
-out signing_key.x509 -keyout signing_key.pem
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"text\/x-go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"mysql","xml":"xml","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","ecmascript":"javascript","groovy":"text\/x-groovy","haskell":"text\/x-haskell","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mysql":"mysql","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"plsql","properties":"text\/x-properties","scheme":"text\/x-scheme","vb":"text\/vbscript","vbnet":"text\/vbscript","verilog":"text\/x-verilog","yaml":"text\/x-yaml"}