119 lines
2.4 KiB
Bash
119 lines
2.4 KiB
Bash
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#!/bin/bash
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# Author: Jan Vcelak <jvcelak@redhat.com>
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set -e
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# default options
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CERTDB_DIR=/etc/openldap/certs
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CERT_NAME="OpenLDAP Server"
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PASSWORD_FILE=
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HOSTNAME_FQDN="$(hostname --fqdn)"
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ALT_NAMES=
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ONCE=0
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# internals
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RANDOM_SOURCE=/dev/urandom
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CERT_RANDOM_BYTES=256
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CERT_KEY_TYPE=rsa
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CERT_KEY_SIZE=1024
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CERT_VALID_MONTHS=12
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# parse arguments
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usage() {
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printf "usage: generate-server-cert.sh [-d certdb-dir] [-n cert-name]\n" >&2
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printf " [-p password-file] [-h hostnames]\n" >&2
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pritnf " [-a dns-alt-names] [-o]\n" >&2
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exit 1
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}
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while getopts "d:n:p:h:a:o" opt; do
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case "$opt" in
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d)
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CERTDB_DIR="$OPTARG"
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;;
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n)
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CERT_NAME="$OPTARG"
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;;
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p)
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PASSWORD_FILE="$OPTARG"
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;;
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h)
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HOSTNAME_FQDN="$OPTARG"
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;;
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a)
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ALT_NAMES="$OPTARG"
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;;
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o)
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ONCE=1
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;;
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\?)
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usage
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;;
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esac
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done
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[ "$OPTIND" -le "$#" ] && usage
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# generated options
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ONCE_FILE="$CERTDB_DIR/.slapd-leave"
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PASSWORD_FILE="${PASSWORD_FILE:-${CERTDB_DIR}/password}"
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ALT_NAMES="${ALT_NAMES:-${HOSTNAME_FQDN},localhost,localhost.localdomain}"
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# verify target location
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if [ "$ONCE" -eq 1 -a -f "$ONCE_FILE" ]; then
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printf "Skipping certificate generating, '%s' exists.\n" "$ONCE_FILE" >&2
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exit 0
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fi
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if ! certutil -d "$CERTDB_DIR" -U &>/dev/null; then
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printf "Directory '%s' is not a valid certificate database.\n" "$CERTDB_DIR" >&2
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exit 1
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fi
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printf "Creating new server certificate in '%s'.\n" "$CERTDB_DIR" >&2
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if [ ! -r "$PASSWORD_FILE" ]; then
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printf "Password file '%s' is not readable.\n" "$PASSWORD_FILE" >&2
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exit 1
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fi
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if certutil -d "$CERTDB_DIR" -L -a -n "$CERT_NAME" &>/dev/null; then
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printf "Certificate '%s' already exists in the certificate database.\n" "$CERT_NAME" >&2
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exit 1
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fi
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# generate server certificate (self signed)
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CERT_RANDOM=$(mktemp)
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dd if=$RANDOM_SOURCE bs=$CERT_RANDOM_BYTES count=1 of=$CERT_RANDOM &>/dev/null
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certutil -d "$CERTDB_DIR" -f "$PASSWORD_FILE" -z "$CERT_RANDOM" \
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-S -x -n "$CERT_NAME" \
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-s "CN=$HOSTNAME_FQDN" \
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-t TC,, \
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-k $CERT_KEY_TYPE -g $CERT_KEY_SIZE \
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-v $CERT_VALID_MONTHS \
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-8 "$ALT_NAMES" \
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&>/dev/null
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rm -f $RANDOM_DATA
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# tune permissions
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if [ "$(id -u)" -eq 0 ]; then
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chgrp ldap "$PASSWORD_FILE"
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chmod g+r "$PASSWORD_FILE"
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else
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printf "WARNING: The server requires read permissions on the password file in order to\n" >&2
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printf " load it's private key from the certificate database.\n" >&2
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fi
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touch "$ONCE_FILE"
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exit 0
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