Add DNS-01 challenge support with configuration files and scripts

data/Dockerfiles/acme/load-dns-config.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+SCRIPT_SOURCE="${BASH_SOURCE[0]:-${0}}"
+if [[ "${SCRIPT_SOURCE}" == "${0}" ]]; then
+  __dns_loader_standalone=1
+else
+  __dns_loader_standalone=0
+fi
+
+CONFIG_PATH="${ACME_DNS_CONFIG_FILE:-/etc/acme/dns-101.conf}"
+
+if [[ ! -f "${CONFIG_PATH}" ]]; then
+  if [[ $__dns_loader_standalone -eq 1 ]]; then
+    exit 0
+  else
+    return 0
+  fi
+fi
+
+source /srv/functions.sh
+
+log_f "Loading DNS-01 configuration from ${CONFIG_PATH}"
+
+LINE_NO=0
+while IFS= read -r line || [[ -n "${line}" ]]; do
+  LINE_NO=$((LINE_NO+1))
+  line="${line%$'\r'}"
+  line_trimmed="$(printf '%s' "${line}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
+  [[ -z "${line_trimmed}" ]] && continue
+  [[ "${line_trimmed:0:1}" == "#" ]] && continue
+  if [[ "${line_trimmed}" != *=* ]]; then
+    log_f "Skipping invalid DNS config line ${LINE_NO} (missing key=value)"
+    continue
+  fi
+  KEY="${line_trimmed%%=*}"
+  VALUE="${line_trimmed#*=}"
+  KEY="$(printf '%s' "${KEY}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
+  VALUE="$(printf '%s' "${VALUE}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
+  if [[ -z "${KEY}" ]]; then
+    log_f "Skipping invalid DNS config line ${LINE_NO} (empty key)"
+    continue
+  fi
+  if [[ "${VALUE}" =~ ^\".*\"$ ]]; then
+    VALUE="${VALUE:1:-1}"
+  elif [[ "${VALUE}" =~ ^\'.*\'$ ]]; then
+    VALUE="${VALUE:1:-1}"
+  fi
+  export "${KEY}"="${VALUE}"
+  log_f "Exported DNS config key ${KEY}"
+
+done < "${CONFIG_PATH}"
+
+if [[ $__dns_loader_standalone -eq 1 ]]; then
+  exit 0
+else
+  return 0
+fi