library/roles/haproxy: Support OCSP stapling.
This commit is contained in:
Andrea Dell'Amico
parent
6b8a448c00
commit
fd14293f39
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@ -0,0 +1,17 @@
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---
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- block:
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- name: Install the socat binary needed to talk to the haproxy socket
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apt: name=socat state=latest update_cache=yes cache_valid_time=3600
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- name: Install a script that refreshes the OCSP configuration and reloads haproxy if needed
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template: src=hapos-upd.j2 dest=/usr/local/bin/hapos-upd owner=root group=root mode=0755
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- name: Install a cron job that refreshes the OCSP configuration
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cron:
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name: "Refresh haproxy OCSP information"
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user: root
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special_time: daily
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job: "/usr/local/bin/hapos-upd --cert {{ haproxy_cert_dir }}/haproxy.pem -v {{ letsencrypt_acme_certs_dir }}/fullchain -s {{ haproxy_admin_socket }} >/var/log/hapos-upd.log 2>&1"
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tags: [ 'haproxy', 'letsencrypt', 'ssl', 'ssl_ocsp' ]
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@ -8,6 +8,9 @@
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when:
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- haproxy_letsencrypt_managed
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- letsencrypt_acme_install is defined
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- include: haproxy-ssl.yml
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when:
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- haproxy_letsencrypt_managed
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- include: haproxy-nagios.yml
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when:
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@ -0,0 +1,571 @@
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#!/bin/bash
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# HAProxy OCSP Stapling Updater
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# Copyright (c) 2015 Pier Carlo Chiodi - http://www.pierky.com
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#
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# https://github.com/pierky/haproxy-ocsp-stapling-updater
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set -o nounset
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VERSION="0.4.1-pre1"
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PROGNAME="hapos-upd"
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if [ -z ${OPENSSL_BIN+x} ]; then
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OPENSSL_BIN="openssl"
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fi
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SOCAT_BIN="socat"
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CERT=""
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VAFILE=""
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HAPROXY_ADMIN_SOCKET_DEFAULT="/run/haproxy/admin.sock"
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HAPROXY_ADMIN_SOCKET="$HAPROXY_ADMIN_SOCKET_DEFAULT"
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GOOD_ONLY=0
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SYSLOG_PRIO=""
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DEBUG=0
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KEEP_TEMP=0
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OCSP_URL=""
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OCSP_HOST=""
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VERIFY=1
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TMP=""
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SKIP_UPDATE=0
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PARTIAL_CHAIN=""
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function Quit() {
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if [ $KEEP_TEMP -eq 0 ]; then
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if [ -n "$TMP" ]; then
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rm -r $TMP &>/dev/null
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fi
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fi
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exit $1
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}
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function LogError() {
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MSG="$1"
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if [ -z "$SYSLOG_PRIO" ]; then
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echo "$MSG" >&2
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else
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logger -p "$SYSLOG_PRIO" -s -- "$PROGNAME - $MSG"
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fi
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echo "$MSG" >>$TMP/log
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}
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function Error() {
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if [ $1 -eq 9 ]; then
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MSG="Error: $2"
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else
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MSG="Error processing '$CERT': $2"
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fi
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LogError "$MSG"
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if [ $1 -eq 9 ]; then
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echo "Run $PROGNAME -h for help" >&2
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fi
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Quit $1
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}
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function Debug() {
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if [ $DEBUG -eq 1 ]; then
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echo "$1"
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fi
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echo "$1" >>$TMP/log
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}
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function Trap() {
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Debug "Aborting"
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Quit 9
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}
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function Usage() {
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echo "
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HAProxy OCSP Stapling Updater - $VERSION
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Copyright (c) 2015 Pier Carlo Chiodi - http://www.pierky.com
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https://github.com/pierky/haproxy-ocsp-stapling-updater
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Usage:
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$PROGNAME [options] --cert crt_full_path
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This script extracts and queries the OCSP server present in a
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certificate to obtain its revocation status, then updates HAProxy by
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writing the '.issuer' and the '.ocsp' files and by sending it the
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'set ssl ocsp-response' command through the local UNIX admin socket.
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The crt_full_path argument is the full path to the certificate bundle
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used in haproxy 'crt' setting. End-entity (EE) certificate plus any
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intermediate CA certificates must be concatenated there.
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An OCSP query is sent to the OCSP server given on the command line
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(--ocsp-url and --ocsp-host argument); if these arguments are missing,
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URL and Host header values are automatically extracted from the
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certificate.
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If the '.issuer' file already exists it's used to build the OCSP
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request, otherwise the chain is extracted from crt_full_path and used
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to identify the issuer.
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Finally, it writes the related '.issuer' and .'ocsp' files and updates
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haproxy, using 'socat' and the local UNIX socket (--socket argument,
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default $HAPROXY_ADMIN_SOCKET_DEFAULT).
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Exit codes:
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0 OK
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1 openssl certificates handling error
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2 OCSP server URL not found
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3 string parsing / PEM manipulation error
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4 OCSP error
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5 haproxy management error
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9 program error (wrong arguments, missing dependencies)
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Options:
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-d, --debug : don't do anything, print debug messages only.
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--keep-temp : keep temporary directory after exiting (for
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debug purposes).
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-g, --good-only : do not update haproxy if OCSP response
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certificate status value is not 'good'.
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-l, --syslog priority : log errors to syslog system log module.
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The priority may be specified numerically
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or as a facility.level pair (e.g.
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local7.error).
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--ocsp-url url : OCSP server URL; use this instead of the
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one in the EE certificate.
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--ocsp-host host : OCSP server hostname to be used in the
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'Host:' header; use this instead of the one
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extracted from the OCSP server URL.
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--partial-chain : Allow partial certificate chain if at least one certificate
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is in trusted store. Useful when validating an intermediate
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certificate without the root CA.
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-s, --socket file : haproxy admin socket. If omitted,
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$HAPROXY_ADMIN_SOCKET_DEFAULT is used by default.
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This script is distributed with only one
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method to update haproxy: using 'socat'
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with a local admin-level UNIX socket.
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Feel free to implement other mechanisms as
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needed! The right section in the code is
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\"UPDATE HAPROXY\", at the end of the script.
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-v, --VAfile file : same as the openssl ocsp -VAfile option
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with 'file' as argument. For more details:
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'man ocsp'.
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If file = \"-\" then the chain extracted
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from the certificate's bundle (or .issuer
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file) is used (useful for OCSP responses
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that don't include the signer certificate).
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--noverify : Do not verify OCSP response.
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-S, --skip-update : Do not notify haproxy of the new OCSP response.
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-h, --help : this help."
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}
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trap Trap INT TERM
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TMP="`mktemp -d -q -t $PROGNAME.XXXXXXXXXX`"
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# COMMAND LINE PROCESSING
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# ----------------------------------
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while [[ $# > 0 ]]
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do
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case "$1" in
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-h|--help)
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Usage
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Quit 0
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;;
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-d|--debug)
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DEBUG=1
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;;
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--keep-temp)
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KEEP_TEMP=1
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;;
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-g|--good-only)
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GOOD_ONLY=1
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;;
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--noverify)
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VERIFY=0
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;;
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--partial-chain)
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PARTIAL_CHAIN="-partial_chain"
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;;
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-l|--syslog)
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if [ $# -le 1 ]; then
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Error 9 "mandatory value is missing for $1 argument"
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fi
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SYSLOG_PRIO="$2"
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shift
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;;
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--ocsp-url)
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if [ $# -le 1 ]; then
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Error 9 "mandatory value is missing for $1 argument"
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fi
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OCSP_URL="$2"
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shift
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;;
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--ocsp-host)
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if [ $# -le 1 ]; then
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Error 9 "mandatory value is missing for $1 argument"
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fi
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OCSP_HOST="$2"
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shift
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;;
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-c|--cert)
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if [ $# -le 1 ]; then
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Error 9 "mandatory value is missing for $1 argument"
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fi
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CERT="$2"
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shift
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;;
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-v|--VAfile)
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if [ $# -le 1 ]; then
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Error 9 "mandatory value is missing for $1 argument"
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fi
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VAFILE="$2"
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if [ "$VAFILE" == "-" ]; then
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VAFILE="$TMP/chain.pem"
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else
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if [ ! -e "$VAFILE" ]; then
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Error 9 "VAfile does not exists: $VAFILE"
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fi
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fi
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shift
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;;
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-s|--socket)
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if [ $# -le 1 ]; then
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Error 9 "mandatory value is missing for $1 argument"
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fi
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HAPROXY_ADMIN_SOCKET="$2"
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shift
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;;
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-S|--skip-update)
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SKIP_UPDATE=1
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;;
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*)
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Error 9 "unknown option: $1"
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esac
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shift
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done
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Debug "Temporary directory: $TMP"
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$OPENSSL_BIN version | grep OpenSSL &>>$TMP/log
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if [ $? -ne 0 ]; then
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Error 9 "openssl binary not found; adjust OPENSSL_BIN variable in the script"
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fi
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$SOCAT_BIN -V | grep socat &>>$TMP/log
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if [ $? -ne 0 ]; then
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Error 9 "socat binary not found; adjust SOCAT_BIN variable in the script"
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fi
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if [ -z "$CERT" ]; then
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Error 9 "certificate not provided (--cert argument)"
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fi
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# CURRENT RESPONSE EXPIRED?
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# ----------------------------------
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ISNEW=1
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if [ -e $CERT.ocsp ]; then
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ISNEW=0
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Debug "An OCSP response already exists: checking its expiration."
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$OPENSSL_BIN ocsp -respin $CERT.ocsp -text -noverify | \
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grep "Next Update:" &>>$TMP/log
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if [ $? -eq 0 ]; then
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CURR_EXP=`$OPENSSL_BIN ocsp -respin $CERT.ocsp -text -noverify | grep "Next Update:" | cut -d ':' -f 2-`
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CURR_EXP_EPOCH=`date --date="$CURR_EXP" +%s`
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if [ $? -ne 0 ]; then
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Error 3 "can't parse Next Update from current OCSP response"
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fi
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if [ $CURR_EXP_EPOCH -lt `date +%s` ]; then
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Debug "Current OCSP response expiration: $CURR_EXP - expired"
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LogError "current OCSP response is expired: please consider running this script more frequently"
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else
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Debug "Current OCSP response expiration: $CURR_EXP - NOT expired"
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fi
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fi
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fi
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# EXTRACT EE CERTIFICATE INFO
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# ----------------------------------
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# extract EE certificate
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$OPENSSL_BIN x509 -in $CERT -outform PEM -out $TMP/ee.pem &>>$TMP/log
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if [ $? -ne 0 ]; then
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Error 1 "can't extract EE certificate from $CERT"
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fi
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# get OCSP server URL
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if [ -z "$OCSP_URL" ]; then
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OCSP_URL="`$OPENSSL_BIN x509 -in $TMP/ee.pem -ocsp_uri -noout`"
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if [ $? -ne 0 ]; then
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Error 1 "can't obtain OCSP server URL from $CERT"
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fi
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if [ -z "$OCSP_URL" ]; then
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Error 2 "OCSP server URL not found in the EE certificate"
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fi
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Debug "OCSP server URL found: $OCSP_URL"
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else
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Debug "Using OCSP server URL from command line: $OCSP_URL"
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fi
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# check OCSP server URL format (http:// or https://)
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echo "$OCSP_URL" | egrep -i "(http://|https://)" &>/dev/null
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if [ $? -ne 0 ]; then
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Error 3 "OCSP server URL not in http[s]:// format"
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fi
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# get OCSP server URL host name
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if [ -z "$OCSP_HOST" ]; then
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OCSP_HOST="`echo "$OCSP_URL" | egrep -i "(http://|https://)" | cut -d'/' -f 3`"
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if [ $? -ne 0 -o -z "$OCSP_HOST" ]; then
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Error 3 "can't extract hostname from OCSP server URL $OCSP_URL"
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fi
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Debug "OCSP server hostname: $OCSP_HOST"
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else
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Debug "Using OCSP server hostname from command line: $OCSP_HOST"
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fi
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# EXTRACT CHAIN INFO
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# ----------------------------------
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if [ -e $CERT.issuer ]; then
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Debug "Using existing chain ($CERT.issuer)"
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# copy .issuer file to temporary chain.pem
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cp $CERT.issuer $TMP/chain.pem &>>$TMP/log
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if [ $? -ne 0 ]; then
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Error 3 "can't copy current chain from $CERT.issuer"
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fi
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else
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Debug "Extracting chain from certificates bundle"
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# get EE certificate's fingerprint
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FP_EE="`$OPENSSL_BIN x509 -fingerprint -noout -in $TMP/ee.pem`"
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if [ $? -ne 0 -o -z "$FP_EE" ]; then
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Error 1 "can't obtain EE certificate's fingerprint"
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fi
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Debug "EE certificate's fingerprint: $FP_EE"
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# get BEGIN CERTIFICATE and END CERTIFICATE separators
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PEM_BEGIN_CERT="`head $TMP/ee.pem -n 1`"
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PEM_END_CERT="`tail $TMP/ee.pem -n 1`"
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# get number of certificates in the bundle file
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NUM_OF_CERTS=`cat $CERT | grep -e "$PEM_BEGIN_CERT" | wc -l`
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if [ $NUM_OF_CERTS -le 1 ]; then
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Error 3 "can't obtain the number of certificates in the chain"
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fi
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Debug "$NUM_OF_CERTS certificates found in the bundle"
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# save each certificate in the bundle into $TMP/chain-X.pem
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cat $CERT | \
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sed -n -e "/$PEM_BEGIN_CERT/,/$PEM_END_CERT/p" | \
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awk "/$PEM_BEGIN_CERT/{x=\"$TMP/chain-\" ++i \".pem\";}{print > x;}" &>>$TMP/log
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if [ $? -ne 0 ]; then
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Error 3 "can't extract certificates from bundle"
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fi
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# for each certificate that is extracted from the bundle check if
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# it's the EE certificate, otherwise uses it to build the chain file
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for c in `seq 1 $NUM_OF_CERTS`;
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do
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# check fingerprint of current and EE certificates
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FP="`$OPENSSL_BIN x509 -fingerprint -noout -in $TMP/chain-$c.pem`"
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if [ $? -ne 0 -o -z "$FP" ]; then
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Error 1 "can't obtain the fingerprint of the certificate n. $c in the bundle"
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else
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if [ ! "$FP" == "$FP_EE" ]; then
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Debug "Bundle certificate n. $c fingerprint: $FP - it's part of the chain"
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# current certificate is not the same as the EE; append to the chain
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cat $TMP/chain-$c.pem >> $TMP/chain.pem
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else
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Debug "Bundle certificate n. $c fingerprint: $FP - EE certificate"
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fi
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fi
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done
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fi
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# check if the EE certificate validates against the chain
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$OPENSSL_BIN verify $PARTIAL_CHAIN -CAfile $TMP/chain.pem $TMP/ee.pem &>>$TMP/log
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if [ $? -ne 0 ]; then
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if [ -e $CERT.issuer ]; then
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Error 1 "can't validate the EE certificate against the existing chain; if it has been changed recently consider removing the current $CERT.issuer file and let this script to figure out a new one"
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else
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Error 1 "can't validate the EE certificate against the extracted chain"
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fi
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fi
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# OCSP
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# ----------------------------------
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# query the OCSP server and save its response
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$OPENSSL_BIN version | grep "OpenSSL 1.0" &>/dev/null
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if [ $? -eq 0 ]; then
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# OpenSSL 1.0.x
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$OPENSSL_BIN ocsp $PARTIAL_CHAIN -issuer $TMP/chain.pem -cert $TMP/ee.pem \
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-respout $TMP/ocsp.der -noverify \
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-no_nonce -url $OCSP_URL -header "Host" "$OCSP_HOST" &>>$TMP/log
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else
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$OPENSSL_BIN ocsp $PARTIAL_CHAIN -issuer $TMP/chain.pem -cert $TMP/ee.pem \
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-respout $TMP/ocsp.der -noverify \
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-no_nonce -url $OCSP_URL -header "Host=$OCSP_HOST" &>>$TMP/log
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fi
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if [ $? -ne 0 ]; then
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Error 1 "can't receive the OCSP server response"
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fi
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# process the OCSP response
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VERIFYOPT=""
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if [ $VERIFY -eq 0 ]; then
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VERIFYOPT="-noverify"
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fi
|
||||
if [ -z "$VAFILE" ]; then
|
||||
$OPENSSL_BIN ocsp $PARTIAL_CHAIN $VERIFYOPT -issuer $TMP/chain.pem -cert $TMP/ee.pem \
|
||||
-respin $TMP/ocsp.der -no_nonce -CAfile $TMP/chain.pem \
|
||||
-out $TMP/ocsp.txt &>>$TMP/ocsp-verify.txt
|
||||
else
|
||||
$OPENSSL_BIN ocsp $PARTIAL_CHAIN $VERIFYOPT -issuer $TMP/chain.pem -cert $TMP/ee.pem \
|
||||
-respin $TMP/ocsp.der -no_nonce -CAfile $TMP/chain.pem \
|
||||
-VAfile $VAFILE \
|
||||
-out $TMP/ocsp.txt &>>$TMP/ocsp-verify.txt
|
||||
fi
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
Error 1 "can't receive OCSP response"
|
||||
fi
|
||||
|
||||
if [ $VERIFY -eq 1 ]; then
|
||||
Debug "OCSP response verification results: `cat $TMP/ocsp-verify.txt`"
|
||||
|
||||
cat $TMP/ocsp-verify.txt | grep "Response verify OK" &>>$TMP/log
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
grep "signer certificate not found" $TMP/ocsp-verify.txt &>/dev/null
|
||||
|
||||
if [ $? -eq 0 ]; then
|
||||
Error 4 "OCSP response verification failure: signer certificate not found; try with '--VAfile -' or '--VAfile OCSP-response-signing-certificate-file' arguments"
|
||||
else
|
||||
Error 4 "OCSP response verification failure."
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
Debug "OCSP response: `cat $TMP/ocsp.txt`"
|
||||
|
||||
if [ $GOOD_ONLY -eq 1 ]; then
|
||||
cat $TMP/ocsp.txt | head -n 1 | grep ": good" &>>$TMP/log
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
Error 4 "OCSP response, certificate status not good"
|
||||
fi
|
||||
fi
|
||||
|
||||
# UPDATE HAPROXY
|
||||
# ----------------------------------
|
||||
|
||||
# Status:
|
||||
# - $TMP/ocsp.der contains the OCSP response, DER format
|
||||
# - $TMP/ocsp.txt contains the textual OCSP response as produced
|
||||
# by openssl
|
||||
# - the OCSP response has been verified against the chain or
|
||||
# the --VAfile
|
||||
|
||||
if [ $DEBUG -eq 0 ]; then
|
||||
# update .ocsp and .issuer files
|
||||
|
||||
cp $TMP/ocsp.der $CERT.ocsp &>>$TMP/log
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
Error 5 "can't update $CERT.ocsp file"
|
||||
fi
|
||||
|
||||
if [ ! -e $CERT.issuer ]; then
|
||||
cp $TMP/chain.pem $CERT.issuer &>>$TMP/log
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
Error 5 "can't update $CERT.issuer file"
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ $SKIP_UPDATE -eq 0 ]; then
|
||||
if [ $ISNEW -eq 1 ]; then
|
||||
# no .ocsp file found, maybe it's an initial run
|
||||
Debug "Reloading haproxy."
|
||||
|
||||
service haproxy reload
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
Error 5 "can't reload haproxy with 'service haproxy reload'"
|
||||
fi
|
||||
else
|
||||
# update haproxy via local UNIX socket
|
||||
Debug "Updating haproxy."
|
||||
|
||||
echo "set ssl ocsp-response `base64 -w 0 $TMP/ocsp.der`" | $SOCAT_BIN stdio $HAPROXY_ADMIN_SOCKET &>>$TMP/log
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
Error 5 "can't update haproxy ssl ocsp-response using $HAPROXY_ADMIN_SOCKET socket"
|
||||
fi
|
||||
fi
|
||||
else
|
||||
Debug "Not notifying haproxy because skip-update is set."
|
||||
fi
|
||||
|
||||
else
|
||||
Debug "Debug mode: haproxy update skipped."
|
||||
fi
|
||||
|
||||
# remove temporary files and quit with success
|
||||
Quit 0
|
||||
|
||||
# vim: set tabstop=4 shiftwidth=4 expandtab:
|
||||
Loading…
Reference in New Issue