create_opendkim_key.sh: add support for dynamic updates using 'nsupdate'

conf/create_opendkim_key.conf.sample

@@ -0,0 +1,104 @@
+# ---------------------------------------------------------
+# - Parameter Settings for script 'create_opendkim_key.sh'.
+# ---------------------------------------------------------
+
+
+# ----------
+# DNS Server
+# ----------
+
+# - dns_server
+# -
+# - The DNS Server who is serving the update zone and is used
+# - for the dynamic updates (nsupdate)
+# -
+dns_server="b.ns.oopen.de"
+
+# - update_dns
+# -
+# - Possible Values are 'true' or 'false'
+# -
+#update_dns=""
+
+# - update_zone
+# -
+# - Zone containing the DKIM TXT record.
+# -
+# - Example:
+# -    update_zone="dkim.oopen.de"
+# -
+#update_zone=""
+
+# - TTL
+# -
+# - TTL for the DKIM TXT Record.
+# -
+# - Defaults to "360"
+#TTL=360
+
+
+# ----------
+# TSIG Key
+# ----------
+
+# - key_secret
+# -
+# - Sectret Key used by 'nsupdate' to create/update the
+# - DKIM TXT record.
+# -
+# - Example:
+# -    key_secret="EtvvMdW0PXD4GMHP+onuHZ0dT/Z8OSJGlce/xH10OwI="
+# -
+#key_secret=""
+
+# - key_algo
+# -
+# - The key algorithm used for key creation. Available choices are: hmac-md5, 
+# - hmac-sha1, hmac-sha224, hmac-sha256, hmac-sha384 and hmac-sha512. The 
+# - default is hmac-sha256. Options are case-insensitive.
+# -
+# - Example:
+# -    key_algo="hmac-md5"
+# -
+# - Defaults to 'hmac-sha256'
+# -
+#key_algo="hmac-sha256"
+
+# - key_name
+# -
+# - Name of the Key
+# -
+# - Defaults to "$update_zone"
+# -
+#key_name=
+
+
+# ----------
+# OpenDKIM Installation
+# ----------
+
+# - opendkim_dir
+# -
+# - OpenDKIM's etc-directory
+# -
+# - Defaults to opendkim_dir="/etc/opendkim"
+# -
+#opendkim_dir="/etc/opendkim"
+
+# - key_base_dir
+# -
+# - Defaults to "${opendkim_dir}/keys"
+# -
+#key_base_dir=${opendkim_dir}/keys
+
+# - signing_table_file
+# -
+# - Defaults to "${opendkim_dir}/signing.table"
+# -
+#signing_table_file="${opendkim_dir}/signing.table"
+
+# - key_table_file
+# -
+# - Defaults to "${opendkim_dir}/key.table"
+# -
+#key_table_file="${opendkim_dir}/key.table"