get-dkim-dns-entry.php
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get-dkim-dns-entry.php
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	#!/usr/bin/env php
	<?php
	/* -------------------------------------------------------------
	Nasqueron mail services
	- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	Project: Nasqueron
	Created: 2017-01-14
	License: Trivial work, not eligible to copyright
	Source file: roles/mailserver/dkim/files/bin/get-dkim-dns-entry.php
	-------------------------------------------------------------

	<auto-generated>
	This file is managed by our rOPS SaltStack repository.

	Changes to this file may cause incorrect behavior
	and will be lost if the state is redeployed.
	</auto-generated>
	*/

	///
	/// Parse arguments
	///

	if ($argc < 2) {
	fwrite(STDERR, "Usage: $argv[0] $file\n");
	exit(1);
	}

	$file = $argv[1];

	if (!file_exists($file)) {
	fwrite(STDERR, "File not found: $file\n");
	exit(2);
	}

	///
	/// Reads file
	///

	function to_one_line ($string) {
	return str_replace(["\r", "\n"], "", trim($string));
	}

	function to_one_line_from_bind ($string) {
	$toReturn = "";
	foreach (explode('"', $string) as $fragment) {
	if (trim($fragment) !== "") {
	$toReturn .= $fragment;
	}
	}
	return $toReturn;
	}

	function get_dns_record ($content) {
	$record = to_one_line($content);
	if (!preg_match("/(.*)\._domainkey/", $record, $matches)) {
	throw new Exception("Can't parse file.");
	}
	$subdomain = $matches[0];

	if (!preg_match("/\s+IN\s+TXT\s+$(.*)$/", $record, $matches)) {
	throw new Exception("Can't parse file.");
	}
	$value = to_one_line_from_bind($matches[1]);

	return "$subdomain TXT $value";
	}

	try {
	echo get_dns_record(file_get_contents($file)), "\n";
	} catch (Exception $ex) {
	fwrite(STDERR, $ex->getMessage());
	}

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