140 lines
3.9 KiB
Bash
Executable File
140 lines
3.9 KiB
Bash
Executable File
#!/bin/sh -e
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#
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# 2021 Joachim Desroches (joachim.desroches@epfl.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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os=$(cat "${__global:?}/explorer/os")
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CFG_DIR="/etc/opendkim"
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user="opendkim"
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group="opendkim"
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case "$os" in
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'alpine')
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:
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;;
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'freebsd')
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CFG_DIR="/usr/local/etc/mail"
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user="mailnull"
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group="mailnull"
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;;
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*)
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cat <<- EOF >&2
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__opendkim_genkey currently only supports Alpine Linux. Please
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contribute an implementation for $os if you can.
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EOF
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exit 1
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;;
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esac
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# Logic to simplify the type as documented in
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# https://code.ungleich.ch/ungleich-public/cdist-contrib/issues/20#issuecomment-14711
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DOMAIN="$(cat "${__object:?}/parameter/domain" 2>/dev/null || true)"
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SELECTOR="$(cat "${__object:?}/parameter/selector" 2>/dev/null || true)"
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if [ -z "${DOMAIN}${SELECTOR}" ]; then
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# Neither SELECTOR nor DOMAIN were passed, try to use __object_id
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if echo "${__object_id:?}" | \
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grep -qE '^[^/[:space:]]+/[^/[:space:]]+$'; then
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# __object_id matches, let's get the data
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DOMAIN="$(echo "${__object_id:?}" | cut -d '/' -f 1)"
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SELECTOR="$(echo "${__object_id:?}" | cut -d '/' -f 2)"
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else
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# It doesn't match the pattern, this is sad
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cat <<- EOF >&2
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The arguments --domain and --selector were not used.
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So __object_id must match DOMAIN/SELECTOR.
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But instead the type got: ${__object_id:?}
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EOF
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exit 1
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fi
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elif [ -z "${DOMAIN}" ] || [ -z "${SELECTOR}" ]; then
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# Only one was passed, this is sad :-(
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cat <<- EOF >&2
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You must pass either both --selector and --domain or none of them.
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If these arguments are absent, __object_id must match: DOMAIN/SELECTOR.
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EOF
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exit 1
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# else: both were passed
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fi
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# Persist data for gencode-remote
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printf '%s' "${user:?}" > "${__object:?}/user"
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printf '%s' "${group:?}" > "${__object:?}/group"
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printf '%s' "${DOMAIN:?}" > "${__object:?}/domain"
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printf '%s' "${SELECTOR:?}" > "${__object:?}/selector"
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DIRECTORY="/var/db/dkim/"
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if [ -f "${__object:?}/parameter/directory" ];
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then
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# Be forgiving about a lack of trailing slash
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DIRECTORY="$(sed -E 's!([^/])$!\1/!' < "${__object:?}/parameter/directory")"
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fi
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SIGKEY="${DOMAIN:?}"
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if [ -f "${__object:?}/parameter/sigkey" ];
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then
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SIGKEY="$(cat "${__object:?}/parameter/sigkey")"
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fi
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SIGDOMAIN="${DOMAIN:?}"
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if [ -f "${__object:?}/parameter/sigdomain" ];
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then
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SIGDOMAIN="$(cat "${__object:?}/parameter/sigdomain")"
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fi
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# Ensure the key-container directory exists with the proper permissions
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__directory "${DIRECTORY}" \
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--mode 0750 \
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--owner "${user}" --group "${group}"
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# OS-specific code
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case "$os" in
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'alpine')
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# This is needed for opendkim-genkey
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__package opendkim-utils
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;;
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esac
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key_table="${CFG_DIR}/KeyTable"
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signing_table="${CFG_DIR}/SigningTable"
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KEY_STATE="$(cut -f 1 "${__object:?}/explorer/key-state")"
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KEY_LOCATION="$(cut -f 2- "${__object:?}/explorer/key-state")"
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__line "__opendkim_genkey/${__object_id:?}" \
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--file "${key_table}" \
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--line "${__object_id:?} ${SIGDOMAIN:?}:${SELECTOR:?}:${KEY_LOCATION:?}" \
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--regex "^${__object_id:?}[[:space:]]" \
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--state 'replace'
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sigtable_block() {
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for sigkey in ${SIGKEY:?}; do
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echo "${sigkey:?} ${__object_id:?}"
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done
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}
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__block "__opendkim_genkey/${__object_id:?}" \
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--file "${signing_table}" \
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--text "$(sigtable_block)"
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if [ "${KEY_STATE:?}" = "present" ]; then
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# Ensure proper permissions for the key file
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__file "${KEY_LOCATION}" \
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--owner "${user}" \
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--group "${group}" \
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--mode 0600
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fi
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