share/examples/uefisign/uefikeys

   1 #!/bin/sh
   2 #
   3 # See uefisign(8) manual page for usage instructions.
   4 #
   5 #
   6
   7 die() {
   8         echo "$*" > /dev/stderr
   9         exit 1
  10 }
  11
  12 if [ $# -ne 1 ]; then
  13         echo "usage: $0 common-name"
  14         exit 1
  15 fi
  16
  17 certfile="${1}.pem"
  18 efifile="${1}.cer"
  19 keyfile="${1}.key"
  20 # XXX: Set this to ten years; we don't want system to suddenly stop booting
  21 #      due to certificate expiration.  Better way would be to use Authenticode
  22 #      Timestamp.  That said, the rumor is UEFI implementations ignore it anyway.
  23 days="3650"
  24 subj="/CN=${1}"
  25
  26 [ ! -e "${certfile}" ] || die "${certfile} already exists"
  27 [ ! -e "${efifile}" ] || die "${efifile} already exists"
  28 [ ! -e "${keyfile}" ] || die "${keyfile} already exists"
  29
  30 umask 077 || die "umask 077 failed"
  31
  32 openssl genrsa -out "${keyfile}" 2048 2> /dev/null || die "openssl genrsa failed"
  33 openssl req -new -x509 -sha256 -days "${days}" -subj "${subj}" -key "${keyfile}" -out "${certfile}" || die "openssl req failed"
  34 openssl x509 -inform PEM -outform DER -in "${certfile}" -out "${efifile}" || die "openssl x509 failed"
  35
  36 echo "certificate: ${certfile}; private key: ${keyfile}; certificate to enroll in UEFI: ${efifile}"