Draft script to propagate it:
| 1 | #!/bin/sh |
|---|---|
| 2 | |
| 3 | # ------------------------------------------------------------- |
| 4 | # Propagate a Let's encrypt certificate to the mail server |
| 5 | # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 | # Project: Nasqueron |
| 7 | # Created: 2016-05-21 |
| 8 | # License: Trivial work, not eligible to copyright |
| 9 | # Dependencies: OpenSSL |
| 10 | # ------------------------------------------------------------- |
| 11 | |
| 12 | # ------------------------------------------------------------- |
| 13 | # Configuration |
| 14 | # ------------------------------------------------------------- |
| 15 | |
| 16 | # Relevant paths |
| 17 | LETSENCRYPT_CERT_FOLDER=/data/letsencrypt/etc/live/mail.nasqueron.org-0001 |
| 18 | MAILSERVER_CERT_FOLDER=/var/lib/lxc/mailserver/rootfs/etc/ssl/certs |
| 19 | HASH_FOLDER=/tmp |
| 20 | |
| 21 | # To identify an unique certifate, we use the following content and path |
| 22 | # for an hash file. |
| 23 | ACTUAL_HASH=`openssl sha256 $LETSENCRYPT_CERT_FOLDER/cert.pem` |
| 24 | HASH_FILE = $HASH_FOLDER/hash-cert-`openssl sha256 $LETSENCRYPT_CERT_FOLDER` |
| 25 | |
| 26 | # ------------------------------------------------------------- |
| 27 | # Helper methods |
| 28 | # ------------------------------------------------------------- |
| 29 | |
| 30 | # Determines if we should propagate a new certificate |
| 31 | should_propagate() { |
| 32 | if [ ! -f $HASH_FILE ]; then |
| 33 | return 1 |
| 34 | elif is_cert_hash_changed; then |
| 35 | return 1 |
| 36 | else |
| 37 | return 0 |
| 38 | fi |
| 39 | } |
| 40 | |
| 41 | # Determines if the certificate has been modified, based on last recorded hash |
| 42 | is_cert_hash_changed() { |
| 43 | EXPECTED_HASH=`cat $HASH_FILE` |
| 44 | |
| 45 | if [ "$ACTUAL_HASH" = "$EXPECTED_HASH" ]; then |
| 46 | return 0 |
| 47 | else |
| 48 | return 1 |
| 49 | fi |
| 50 | } |
| 51 | |
| 52 | # Saves the new certificate hash |
| 53 | save_certificate_hash() { |
| 54 | echo $ACTUAL_HASH > $HASH_FILE |
| 55 | } |
| 56 | |
| 57 | # ------------------------------------------------------------- |
| 58 | # Procedural code |
| 59 | # ------------------------------------------------------------- |
| 60 | |
| 61 | if should_propagate; then |
| 62 | echo cp $LETSENCRYPT_CERT_FOLDER/fullchain.pem $MAILSERVER_CERT_FOLDER/mailserver.crt |
| 63 | echo cp $LETSENCRYPT_CERT_FOLDER/privkey.pem $MAILSERVER_CERT_FOLDER/mailserver.key |
| 64 | save_certificate_hash |
| 65 | fi |