<?php
/*
 * crypt.inc
 *
 * part of pfSense (https://www.pfsense.org)
 * Copyright (c) 2008-2016 Rubicon Communications, LLC (Netgate)
 * Copyright (c) 2008 Shrew Soft Inc. All rights reserved.
 * All rights reserved.
 *
 * originally part of m0n0wall (http://m0n0.ch/wall)
 * Copyright (c) 2003-2004 Manuel Kasper <mk@neon1.net>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *    "This product includes software developed by the pfSense Project
 *    for use in the pfSense® software distribution. (http://www.pfsense.org/).
 *
 * 4. The names "pfSense" and "pfSense Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    coreteam@pfsense.org.
 *
 * 5. Products derived from this software may not be called "pfSense"
 *    nor may "pfSense" appear in their names without prior written
 *    permission of the Electric Sheep Fencing, LLC.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *
 * "This product includes software developed by the pfSense Project
 * for use in the pfSense software distribution (http://www.pfsense.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE pfSense PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE pfSense PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

	function crypt_data($val, $pass, $opt) {
		$file = tempnam("/tmp", "php-encrypt");
		file_put_contents("{$file}.dec", $val);
		exec("/usr/bin/openssl enc {$opt} -aes-256-cbc -in {$file}.dec -out {$file}.enc -k " . escapeshellarg($pass));
		if (file_exists("{$file}.enc")) {
			$result = file_get_contents("{$file}.enc");
		} else {
			$result = "";
			log_error(gettext("Failed to encrypt/decrypt data!"));
		}
		@unlink($file);
		@unlink("{$file}.dec");
		@unlink("{$file}.enc");
		return $result;
	}

	function encrypt_data(& $data, $pass) {
		return base64_encode(crypt_data($data, $pass, "-e"));
	}

	function decrypt_data(& $data, $pass) {
		return crypt_data(base64_decode($data), $pass, "-d");
	}

	function tagfile_reformat($in, & $out, $tag) {

		$out = "---- BEGIN {$tag} ----\n";

		$size = 80;
		$oset = 0;
		while ($size >= 64) {
			$line = substr($in, $oset, 64);
			$out .= $line."\n";
			$size = strlen($line);
			$oset += $size;
		}

		$out .= "---- END {$tag} ----\n";

		return true;
	}

	function tagfile_deformat($in, & $out, $tag) {

		$btag_val = "---- BEGIN {$tag} ----";
		$etag_val = "---- END {$tag} ----";

		$btag_len = strlen($btag_val);
		$etag_len = strlen($etag_val);

		$btag_pos = stripos($in, $btag_val);
		$etag_pos = stripos($in, $etag_val);

		if (($btag_pos === false) || ($etag_pos === false)) {
			return false;
		}

		$body_pos = $btag_pos + $btag_len;
		$body_len = strlen($in);
		$body_len -= $btag_len;
		$body_len -= $etag_len + 1;

		$out = substr($in, $body_pos, $body_len);

		return true;
	}

?>