pfSense

<?php

/* $Id$ */

/*

	Copyright (C) 2010 Jim Pingle <jimp@pfsense.org>

	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.

        THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS 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

        AUTHOR 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.

		DISABLE_PHP_LINT_CHECKING

require_once("functions.inc");

function & lookup_ca($refid) {

	global $config;

		foreach ($config['ca'] as & $ca)

				return $ca;

	return false;

}

function & lookup_ca_by_subject($subject) {

	global $config;

		foreach ($config['ca'] as & $ca)

			$ca_subject = cert_get_subject($ca['crt']);

			if ($ca_subject == $subject)

				return $ca;

		}

	return false;

}

function & lookup_cert($refid) {

	global $config;

		foreach ($config['cert'] as & $cert)

				return $cert;

	return false;

}

	global $config;

	if (is_array($config['cert']))

		foreach ($config['cert'] as & $cert)

}

function & lookup_crl($refid) {

	global $config;

	if (is_array($config['crl']))

		foreach ($config['crl'] as & $crl)

			if ($crl['refid'] == $refid)

				return $crl;

	return false;

}

	if($cert['caref']) {

		$chain = array();

		while ($crt) {

			$caref = $crt['caref'];

			if($caref)

				$crt = false;

			if($crt)

				$chain[] = $crt;

		}

		return $chain;

	}

	return false;

}

function ca_chain(& $cert) {

	if($cert['caref']) {

		$ca = "";

		$cas = ca_chain_array($cert);

		if (is_array($cas))

			foreach ($cas as & $ca_cert)

			{

				$ca .= base64_decode($ca_cert['crt']);

				$ca .= "\n";

			}

		return $ca;

	}

	return "";

}

	$ca['crt'] = base64_encode($str);

		$ca['prv'] = base64_encode($key);

		$ca['serial'] = $serial;

	$issuer = cert_get_issuer($str, false);

	// Find my issuer unless self-signed

	if($issuer <> $subject) {

		$issuer_crt =& lookup_ca_by_subject($issuer);

		if($issuer_crt)

			$ca['caref'] = $issuer_crt['refid'];

	}

	/* Correct if child certificate was loaded first */

		foreach ($config['ca'] as & $oca)

			$issuer = cert_get_issuer($oca['crt']);

			if($ca['refid']<>$oca['refid'] && $issuer==$subject)

				$oca['caref'] = $ca['refid'];

		}

		foreach ($config['cert'] as & $cert)

			$issuer = cert_get_issuer($cert['crt']);

			if($issuer==$subject)

				$cert['caref'] = $ca['refid'];

		}

	return true;

}

function ca_create(& $ca, $keylen, $lifetime, $dn) {

	$args = array(

		"digest_alg" => "sha1",

		"encrypt_key" => false);

	// generate a new key pair

	// generate a certificate signing request

	$res_csr = openssl_csr_new($dn, $res_key, $args);

	// self sign the certificate

	$res_crt = openssl_csr_sign($res_csr, null, $res_key, $lifetime, $args);

	// export our certificate data

	    !openssl_x509_export($res_crt, $str_crt))

		return false;

	// return our ca information

	$ca['crt'] = base64_encode($str_crt);

	$ca['prv'] = base64_encode($str_key);

	$ca['serial'] = 0;

	return true;

}

	// Create Intermediate Certificate Authority

	$signing_ca =& lookup_ca($caref);

	if (!$signing_ca)

		return false;

	$signing_ca_res_crt = openssl_x509_read(base64_decode($signing_ca['crt']));

	$signing_ca_res_key = openssl_pkey_get_private(array(0 => base64_decode($signing_ca['prv']) , 1 => ""));

	if (!$signing_ca_res_crt || !$signing_ca_res_key) return false;

	$signing_ca_serial = ++$signing_ca['serial'];

	$args = array(

		"digest_alg" => "sha1",

		"private_key_bits" => (int)$keylen,

		"private_key_type" => OPENSSL_KEYTYPE_RSA,

		"encrypt_key" => false);

	// generate a new key pair

	$res_key = openssl_pkey_new($args);

	if (!$res_key) return false;

	// generate a certificate signing request

	$res_csr = openssl_csr_new($dn, $res_key, $args);

	if (!$res_csr) return false;

	// Sign the certificate

	$res_crt = openssl_csr_sign($res_csr, $signing_ca_res_crt, $signing_ca_res_key, $lifetime, $args, $signing_ca_serial);

	if (!$res_crt) return false;

	// export our certificate data

	if (!openssl_pkey_export($res_key, $str_key) ||

	    !openssl_x509_export($res_crt, $str_crt))

		return false;

	// return our ca information

	$ca['crt'] = base64_encode($str_crt);

	$ca['prv'] = base64_encode($str_key);

	$ca['serial'] = 0;

	return true;

}

	$cert['crt'] = base64_encode($crt_str);

	$cert['prv'] = base64_encode($key_str);

	$subject = cert_get_subject($crt_str, false);

	$issuer = cert_get_issuer($crt_str, false);

	// Find my issuer unless self-signed

	if($issuer <> $subject) {

		$issuer_crt =& lookup_ca_by_subject($issuer);

		if($issuer_crt)

			$cert['caref'] = $issuer_crt['refid'];

	}

	return true;

}

function cert_create(& $cert, $caref, $keylen, $lifetime, $dn) {

	$ca =& lookup_ca($caref);

	if (!$ca)

		return false;

	$ca_str_crt = base64_decode($ca['crt']);

	$ca_str_key = base64_decode($ca['prv']);

	$ca_res_crt = openssl_x509_read($ca_str_crt);

	$args = array(

		"digest_alg" => "sha1",

		"encrypt_key" => false);

	// generate a new key pair

	// generate a certificate signing request

	$res_csr = openssl_csr_new($dn, $res_key, $args);

	// self sign the certificate

	$res_crt = openssl_csr_sign($res_csr, $ca_res_crt, $ca_res_key, $lifetime,

				 $args, $ca_serial);

	// export our certificate data

	    !openssl_x509_export($res_crt, $str_crt))

		return false;

	// return our certificate information

	$cert['caref'] = $caref;

	$cert['crt'] = base64_encode($str_crt);

	$cert['prv'] = base64_encode($str_key);

	return true;

}

function csr_generate(& $cert, $keylen, $dn) {

	$args = array(

		"digest_alg" => "sha1",

		"encrypt_key" => false);

	// generate a new key pair

	// generate a certificate signing request

	$res_csr = openssl_csr_new($dn, $res_key, $args);

	// export our request data

	    !openssl_csr_export($res_csr, $str_csr))

		return false;

	// return our request information

	$cert['csr'] = base64_encode($str_csr);

	$cert['prv'] = base64_encode($str_key);

	return true;

}

function csr_complete(& $cert, $str_crt) {

	// return our request information

	$cert['crt'] = base64_encode($str_crt);

	unset($cert['csr']);

	return true;

}

function csr_get_subject($str_crt, $decode = true) {

	if ($decode)

		$str_crt = base64_decode($str_crt);

	$components = openssl_csr_get_subject($str_crt);

		if (!strlen($subject))

			$subject = "{$a}={$v}";

		else

			$subject = "{$a}={$v}, {$subject}";

	}

	return $subject;

}

function cert_get_subject($str_crt, $decode = true) {

	if ($decode)

		$str_crt = base64_decode($str_crt);

	$inf_crt = openssl_x509_parse($str_crt);

	$components = $inf_crt['subject'];

			ksort($v);

				$asubject = "{$a}={$w}";

				$subject = (strlen($subject)) ? "{$asubject}, {$subject}" : $asubject;

			}

			$subject = (strlen($subject)) ? "{$asubject}, {$subject}" : $asubject;

		}

	return $subject;

}

function cert_get_subject_array($crt) {

	$str_crt = base64_decode($crt);

	$inf_crt = openssl_x509_parse($str_crt);

	$components = $inf_crt['subject'];

	if (!is_array($components))

		return;

	foreach($components as $a => $v)

		$subject_array[] = array('a' => $a, 'v' => $v);

	return $subject_array;

}

	$str_crt = base64_decode($crt);

	$inf_crt = openssl_x509_parse($str_crt);

	return $inf_crt['subject'];

}

	if ($decode)

		$str_crt = base64_decode($str_crt);

	$inf_crt = openssl_x509_parse($str_crt);

	$components = $inf_crt['issuer'];

	ksort($components);

		if (!strlen($issuer))

			$issuer = "{$a}={$v}";

		else

			$issuer = "{$a}={$v}, {$issuer}";

	}

	return $issuer;

}

function cert_get_modulus($str_crt, $decode = true, $type = "crt"){

	if ($decode)

		$str_crt = base64_decode($str_crt);

	$modulus = "";

	if ( in_array($type, array("crt", "prv", "csr")) ) {

			$type = str_replace( array("crt","prv","csr"), array("x509","rsa","req"), $type);

			$modulus = exec("echo \"{$str_crt}\" | openssl {$type} -noout -modulus");

	}

	return $modulus;

}

function csr_get_modulus($str_crt, $decode = true){

	return cert_get_modulus($str_crt, $decode, "csr");

}

function prv_get_modulus($str_crt, $decode = true){

	return cert_get_modulus($str_crt, $decode, "prv");

}

	if (!is_array($config['system']['user']))

		return;

	foreach ($config['system']['user'] as $user) {

		if (!is_array($user['cert']))

			continue;

		foreach ($user['cert'] as $cert) {

				return true;

	}

		return;

	foreach ($config['openvpn']['openvpn-server'] as $ovpns) {

		if ($ovpns['certref'] == $certref)

			return true;

	}

	return false;

}

function is_openvpn_client_cert($certref) {

	global $config;

	if (!is_array($config['openvpn']['openvpn-client']))

		return;

	foreach ($config['openvpn']['openvpn-client'] as $ovpnc) {

		if ($ovpnc['certref'] == $certref)

			return true;

	}

	return false;

}

function is_ipsec_cert($certref) {

	global $config;

	if (!is_array($config['ipsec']['phase1']))

		return;

	foreach ($config['ipsec']['phase1'] as $ipsec) {

		if ($ipsec['certref'] == $certref)

			return true;

	}

	return false;

}

function is_webgui_cert($certref) {

	global $config;

		&& ($config['system']['webgui']['protocol'] != "http"))

}

function cert_in_use($certref) {

	return (is_webgui_cert($certref) ||

		is_user_cert($certref) ||

		is_openvpn_server_cert($certref) ||

		is_openvpn_client_cert($certref) ||

		is_ipsec_cert($certref));

CRL code is a *WORK IN PROGRESS* do not try to use these functions yet.

OpenSSL CRL status code constants.

OCSP_REVOKED_STATUS_NOSTATUS

OCSP_REVOKED_STATUS_UNSPECIFIED

OCSP_REVOKED_STATUS_KEYCOMPROMISE

OCSP_REVOKED_STATUS_CACOMPROMISE

OCSP_REVOKED_STATUS_AFFILIATIONCHANGED

OCSP_REVOKED_STATUS_SUPERSEDED

OCSP_REVOKED_STATUS_CESSATIONOFOPERATION

OCSP_REVOKED_STATUS_CERTIFICATEHOLD

OCSP_REVOKED_STATUS_REMOVEFROMCRL

*/

$openssl_crl_status = array(

	OCSP_REVOKED_STATUS_NOSTATUS              => "No Status (default)",

	OCSP_REVOKED_STATUS_UNSPECIFIED           => "Unspecified",

	OCSP_REVOKED_STATUS_KEYCOMPROMISE         => "Key Compromise",

	OCSP_REVOKED_STATUS_CACOMPROMISE          => "CA Compromise",

	OCSP_REVOKED_STATUS_AFFILIATIONCHANGED    => "Affiliation Changed",

	OCSP_REVOKED_STATUS_SUPERSEDED            => "Superseded",

	OCSP_REVOKED_STATUS_CESSATIONOFOPERATION  => "Cessation of Operation",

function crl_create(& $crl, $caref, $name, $serial=0, $lifetime=9999) {

	global $config;

	$ca =& lookup_ca($caref);

	if (!$ca)

		return false;

	$crl['serial'] = $serial;

	$crl['lifetime'] = $lifetime;

	$crl['cert'] = array();

	$crl_res = crl_update($crl);

	$config['crl'][] = $crl;

	return $crl_res;

}

function crl_update(& $crl) {

	global $config;

	$ca =& lookup_ca($crl['caref']);

	if (!$ca)

		return false;

	$ca_str_crt = base64_decode($ca['crt']);

	$ca_str_key = base64_decode($ca['prv']);

	$crl_res = openssl_crl_new($ca_str_crt, $crl['serial'], $crl['lifetime']);

		foreach ($crl['cert'] as $cert) {

			openssl_crl_revoke_cert($crl_res, base64_decode($cert["crt"]), $cert["revoke_time"], $cert["reason"]);

		}

	openssl_crl_export($crl_res, $crl_text, $ca_str_key);

	$crl['text'] = base64_encode($crl_text);

	return $crl_res;

}

function cert_revoke($cert, & $crl, $reason=OCSP_REVOKED_STATUS_UNSPECIFIED) {

	global $config;

	$cert["revoke_time"] = time();

	$crl["cert"][] = $cert;

	crl_update($crl);

function cert_unrevoke($cert, & $crl) {

	global $config;

				// Protect against accidentally switching the type to imported, for older CRLs

				if (!isset($crl['method']))

					$crl['method'] = "internal";

				crl_update($crl);

			} else

		}

	}

	return false;

}

		}

		foreach ($config['crl'] as $crl) {

			if (!is_array($crl['cert']))

				continue;

			foreach ($crl['cert'] as $rcert) {

			}

		}

	}

	return false;

}

function is_openvpn_server_crl($crlref) {

	global $config;

	if (!is_array($config['openvpn']['openvpn-server']))

		return;

	foreach ($config['openvpn']['openvpn-server'] as $ovpns) {

	return false;

}

function crl_in_use($crlref) {

	return (is_openvpn_server_crl($crlref));

}

function is_crl_internal($crl) {

	/* If this is a certref, not an actual cert, look up the cert first */

	if ($isref) {

		$cert = lookup_cert($crt);

		/* If it's not a valid cert, bail. */

		if (!(is_array($cert) && !empty($cert['crt'])))

			return "";

		$cert = $cert['crt'];

	} else {

		$cert = $crt;