From 18de58fd8b9aaa39946e32f1a0be8c00a81c430e Mon Sep 17 00:00:00 2001 From: Mario Date: Sun, 10 Oct 2021 21:00:22 +0000 Subject: HTTPSig: cleanup, add some doco and implement missing force mechanism for fetching keys --- Zotlabs/Web/HTTPSig.php | 369 ++++++++++++++++++++++++++---------------------- 1 file changed, 202 insertions(+), 167 deletions(-) (limited to 'Zotlabs/Web') diff --git a/Zotlabs/Web/HTTPSig.php b/Zotlabs/Web/HTTPSig.php index 35b18c763..025629c0f 100644 --- a/Zotlabs/Web/HTTPSig.php +++ b/Zotlabs/Web/HTTPSig.php @@ -2,10 +2,13 @@ namespace Zotlabs\Web; +use DateTime; +use DateTimeZone; use Zotlabs\Lib\ActivityStreams; use Zotlabs\Lib\Crypto; use Zotlabs\Lib\Keyutils; use Zotlabs\Lib\Webfinger; +use Zotlabs\Lib\Zotfinger; use Zotlabs\Lib\Libzot; /** @@ -13,7 +16,6 @@ use Zotlabs\Lib\Libzot; * * @see https://tools.ietf.org/html/draft-cavage-http-signatures-10 */ - class HTTPSig { /** @@ -26,10 +28,10 @@ class HTTPSig { * @return string The generated digest header string for $body */ - static function generate_digest_header($body,$alg = 'sha256') { + static function generate_digest_header($body, $alg = 'sha256') { $digest = base64_encode(hash($alg, $body, true)); - switch($alg) { + switch ($alg) { case 'sha512': return 'SHA-512=' . $digest; case 'sha256': @@ -39,29 +41,29 @@ class HTTPSig { } } - static function find_headers($data,&$body) { + static function find_headers($data, &$body) { // decide if $data arrived via controller submission or curl - if(is_array($data) && $data['header']) { - if(! $data['success']) + if (is_array($data) && $data['header']) { + if (!$data['success']) return []; - $h = new HTTPHeaders($data['header']); - $headers = $h->fetcharr(); - $body = $data['body']; + $h = new HTTPHeaders($data['header']); + $headers = $h->fetcharr(); + $body = $data['body']; $headers['(request-target)'] = $data['request_target']; } else { - $headers = []; + $headers = []; $headers['(request-target)'] = strtolower($_SERVER['REQUEST_METHOD']) . ' ' . $_SERVER['REQUEST_URI']; - $headers['content-type'] = $_SERVER['CONTENT_TYPE']; - $headers['content-length'] = $_SERVER['CONTENT_LENGTH']; + $headers['content-type'] = $_SERVER['CONTENT_TYPE']; + $headers['content-length'] = $_SERVER['CONTENT_LENGTH']; - foreach($_SERVER as $k => $v) { - if(strpos($k,'HTTP_') === 0) { - $field = str_replace('_','-',strtolower(substr($k,5))); + foreach ($_SERVER as $k => $v) { + if (strpos($k, 'HTTP_') === 0) { + $field = str_replace('_', '-', strtolower(substr($k, 5))); $headers[$field] = $v; } } @@ -77,10 +79,10 @@ class HTTPSig { // See draft-cavage-http-signatures-10 - static function verify($data,$key = '', $keytype = '') { + static function verify($data, $key = '', $keytype = '') { - $body = $data; - $headers = null; + $body = $data; + $headers = null; $result = [ 'signer' => '', @@ -92,21 +94,21 @@ class HTTPSig { ]; - $headers = self::find_headers($data,$body); + $headers = self::find_headers($data, $body); - if(! $headers) + if (!$headers) return $result; $sig_block = null; - if(array_key_exists('signature',$headers)) { + if (array_key_exists('signature', $headers)) { $sig_block = self::parse_sigheader($headers['signature']); } - elseif(array_key_exists('authorization',$headers)) { + elseif (array_key_exists('authorization', $headers)) { $sig_block = self::parse_sigheader($headers['authorization']); } - if(! $sig_block) { + if (!$sig_block) { logger('no signature provided.', LOGGER_DEBUG); return $result; } @@ -117,71 +119,71 @@ class HTTPSig { $result['header_signed'] = true; $signed_headers = $sig_block['headers']; - if(! $signed_headers) - $signed_headers = [ 'date' ]; + if (!$signed_headers) + $signed_headers = ['date']; $signed_data = ''; - foreach($signed_headers as $h) { - if(array_key_exists($h,$headers)) { + foreach ($signed_headers as $h) { + if (array_key_exists($h, $headers)) { $signed_data .= $h . ': ' . $headers[$h] . "\n"; } - if($h === 'date') { - $d = new \DateTime($headers[$h]); - $d->setTimeZone(new \DateTimeZone('UTC')); - $dplus = datetime_convert('UTC','UTC','now + 1 day'); - $dminus = datetime_convert('UTC','UTC','now - 1 day'); - $c = $d->format('Y-m-d H:i:s'); - if($c > $dplus || $c < $dminus) { + if ($h === 'date') { + $d = new DateTime($headers[$h]); + $d->setTimeZone(new DateTimeZone('UTC')); + $dplus = datetime_convert('UTC', 'UTC', 'now + 1 day'); + $dminus = datetime_convert('UTC', 'UTC', 'now - 1 day'); + $c = $d->format('Y-m-d H:i:s'); + if ($c > $dplus || $c < $dminus) { logger('bad time: ' . $c); return $result; } } } - $signed_data = rtrim($signed_data,"\n"); + $signed_data = rtrim($signed_data, "\n"); $algorithm = null; - if($sig_block['algorithm'] === 'rsa-sha256') { + if ($sig_block['algorithm'] === 'rsa-sha256') { $algorithm = 'sha256'; } - if($sig_block['algorithm'] === 'rsa-sha512') { + if ($sig_block['algorithm'] === 'rsa-sha512') { $algorithm = 'sha512'; } - if(! array_key_exists('keyId',$sig_block)) + if (!array_key_exists('keyId', $sig_block)) return $result; $result['signer'] = $sig_block['keyId']; - $cached_key = self::get_key($key,$keytype,$result['signer']); + $cached_key = self::get_key($key, $keytype, $result['signer']); - if(! ($cached_key && $cached_key['public_key'])) { + if (!($cached_key && $cached_key['public_key'])) { return $result; } - $x = Crypto::verify($signed_data,$sig_block['signature'],$cached_key['public_key'],$algorithm); + $x = Crypto::verify($signed_data, $sig_block['signature'], $cached_key['public_key'], $algorithm); logger('verified: ' . $x, LOGGER_DEBUG); $fetched_key = ''; - if(! $x) { + if (!$x) { // try again, ignoring the local actor (xchan) cache and refetching the key // from its source - $fetched_key = self::get_key($key,$keytype,$result['signer'],true); + $fetched_key = self::get_key($key, $keytype, $result['signer'], true); if ($fetched_key && $fetched_key['public_key']) { - $y = Crypto::verify($signed_data,$sig_block['signature'],$fetched_key['public_key'],$algorithm); + $y = Crypto::verify($signed_data, $sig_block['signature'], $fetched_key['public_key'], $algorithm); logger('verified: (cache reload) ' . $x, LOGGER_DEBUG); } - if (! $y) { + if (!$y) { logger('verify failed for ' . $result['signer'] . ' alg=' . $algorithm . (($fetched_key['public_key']) ? '' : ' no key')); $sig_block['signature'] = base64_encode($sig_block['signature']); - logger('affected sigblock: ' . print_r($sig_block,true)); - logger('headers: ' . print_r($headers,true)); - logger('server: ' . print_r($_SERVER,true)); + logger('affected sigblock: ' . print_r($sig_block, true)); + logger('headers: ' . print_r($headers, true)); + logger('server: ' . print_r($_SERVER, true)); return $result; } @@ -189,57 +191,57 @@ class HTTPSig { $key = (($fetched_key) ? $fetched_key : $cached_key); - $result['portable_id'] = $key['portable_id']; + $result['portable_id'] = $key['portable_id']; $result['header_valid'] = true; - if(in_array('digest',$signed_headers)) { + if (in_array('digest', $signed_headers)) { $result['content_signed'] = true; - $digest = explode('=', $headers['digest'], 2); - if($digest[0] === 'SHA-256') + $digest = explode('=', $headers['digest'], 2); + if ($digest[0] === 'SHA-256') $hashalg = 'sha256'; - if($digest[0] === 'SHA-512') + if ($digest[0] === 'SHA-512') $hashalg = 'sha512'; - if(base64_encode(hash($hashalg,$body,true)) === $digest[1]) { + if (base64_encode(hash($hashalg, $body, true)) === $digest[1]) { $result['content_valid'] = true; } logger('Content_Valid: ' . (($result['content_valid']) ? 'true' : 'false')); - if (! $result['content_valid']) { - logger('invalid content signature: data ' . print_r($data,true)); - logger('invalid content signature: headers ' . print_r($headers,true)); - logger('invalid content signature: body ' . print_r($body,true)); + if (!$result['content_valid']) { + logger('invalid content signature: data ' . print_r($data, true)); + logger('invalid content signature: headers ' . print_r($headers, true)); + logger('invalid content signature: body ' . print_r($body, true)); } } return $result; } - static function get_key($key,$keytype,$id) { + static function get_key($key, $keytype, $id, $force = false) { - if(is_array($key)) - btlogger('key is array: ' . print_r($key,true)); + if (is_array($key)) + btlogger('key is array: ' . print_r($key, true)); - if($key) { - if(function_exists($key)) { + if ($key) { + if (function_exists($key)) { return $key($id); } - return [ 'public_key' => $key ]; + return ['public_key' => $key]; } - if($keytype === 'zot6') { - $key = self::get_zotfinger_key($id); - if($key) { + if ($keytype === 'zot6') { + $key = self::get_zotfinger_key($id, $force); + if ($key) { return $key; } } - if(strpos($id,'#') === false) { - $key = self::get_webfinger_key($id); + if (strpos($id, '#') === false) { + $key = self::get_webfinger_key($id, $force); } - if(! $key) { - $key = self::get_activitystreams_key($id); + if (!$key) { + $key = self::get_activitystreams_key($id, $force); } return $key; @@ -249,10 +251,10 @@ class HTTPSig { static function convertKey($key) { - if(strstr($key,'RSA ')) { + if (strstr($key, 'RSA ')) { return Keyutils::rsaToPem($key); } - elseif(substr($key,0,5) === 'data:') { + elseif (substr($key, 0, 5) === 'data:') { return Keyutils::convertSalmonKey($key); } else { @@ -263,70 +265,89 @@ class HTTPSig { /** - * @brief + * @brief get a cached key or fetch it with ActivityStreams * * @param string $id - * @return boolean|string - * false if no pub key found, otherwise return the pub key + * @param boolean $force (optional, default false) + * @return boolean|array + * false if no pub key found, otherwise return an array with the pub key */ - static function get_activitystreams_key($id) { - - // remove fragment + static function get_activitystreams_key($id, $force = false) { - $url = ((strpos($id,'#')) ? substr($id,0,strpos($id,'#')) : $id); + // Check the local cache first, but remove any fragments like #main-key since these won't be present in our cached data + $url = ((strpos($id, '#')) ? substr($id, 0, strpos($id, '#')) : $id); - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' and hubloc_network in ('zot6', 'activitypub')", - dbesc(str_replace('acct:','',$url)), - dbesc($url) - ); + // $force is used to ignore the local cache and only use the remote data; for instance the cached key might be stale + if (!$force) { + $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' and hubloc_network in ('zot6', 'activitypub') order by hubloc_id desc", + dbesc(str_replace('acct:', '', $url)), + dbesc($url) + ); - $x = Libzot::zot_record_preferred($x); - - if($x && $x['xchan_pubkey']) { - return [ 'portable_id' => $x['xchan_hash'], 'public_key' => $x['xchan_pubkey'] , 'hubloc' => $x ]; + if ($x) { + $best = Libzot::zot_record_preferred($x); + } + if ($best && $best['xchan_pubkey']) { + return ['portable_id' => $best['xchan_hash'], 'public_key' => $best['xchan_pubkey'], 'hubloc' => $best]; + } } + // The record wasn't in cache. Fetch it now. $r = ActivityStreams::fetch($id); - if($r) { - if(array_key_exists('publicKey',$r) && array_key_exists('publicKeyPem',$r['publicKey']) && array_key_exists('id',$r['publicKey'])) { - if($r['publicKey']['id'] === $id || $r['id'] === $id) { - $portable_id = ((array_key_exists('owner',$r['publicKey'])) ? $r['publicKey']['owner'] : EMPTY_STR); - return [ 'public_key' => self::convertKey($r['publicKey']['publicKeyPem']), 'portable_id' => $portable_id, 'hubloc' => [] ]; + if ($r) { + if (array_key_exists('publicKey', $r) && array_key_exists('publicKeyPem', $r['publicKey']) && array_key_exists('id', $r['publicKey'])) { + if ($r['publicKey']['id'] === $id || $r['id'] === $id) { + $portable_id = ((array_key_exists('owner', $r['publicKey'])) ? $r['publicKey']['owner'] : EMPTY_STR); + return ['public_key' => self::convertKey($r['publicKey']['publicKeyPem']), 'portable_id' => $portable_id, 'hubloc' => []]; } } } + + // No key was found return false; } + /** + * @brief get a cached key or fetch it with Webfinger + * + * @param string $id + * @param boolean $force (optional, default false) + * @return boolean|array + * false if no pub key found, otherwise return an array with the pub key + */ - static function get_webfinger_key($id) { + static function get_webfinger_key($id, $force = false) { - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s'", - dbesc(str_replace('acct:','',$id)), - dbesc($id) - ); + if (!$force) { + $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' and hubloc_network in ('zot6', 'activitypub') order by hubloc_id desc", + dbesc(str_replace('acct:', '', $id)), + dbesc($id) + ); - $x = Libzot::zot_record_preferred($x); + if ($x) { + $best = Libzot::zot_record_preferred($x); + } - if($x && $x['xchan_pubkey']) { - return [ 'portable_id' => $x['xchan_hash'], 'public_key' => $x['xchan_pubkey'] , 'hubloc' => $x ]; + if ($best && $best['xchan_pubkey']) { + return ['portable_id' => $best['xchan_hash'], 'public_key' => $best['xchan_pubkey'], 'hubloc' => $best]; + } } - $wf = Webfinger::exec($id); - $key = [ 'portable_id' => '', 'public_key' => '', 'hubloc' => [] ]; + $wf = Webfinger::exec($id); + $key = ['portable_id' => '', 'public_key' => '', 'hubloc' => []]; - if($wf) { - if(array_key_exists('properties',$wf) && array_key_exists('https://w3id.org/security/v1#publicKeyPem',$wf['properties'])) { + if ($wf) { + if (array_key_exists('properties', $wf) && array_key_exists('https://w3id.org/security/v1#publicKeyPem', $wf['properties'])) { $key['public_key'] = self::convertKey($wf['properties']['https://w3id.org/security/v1#publicKeyPem']); } - if(array_key_exists('links', $wf) && is_array($wf['links'])) { - foreach($wf['links'] as $l) { - if(! (is_array($l) && array_key_exists('rel',$l))) { + if (array_key_exists('links', $wf) && is_array($wf['links'])) { + foreach ($wf['links'] as $l) { + if (!(is_array($l) && array_key_exists('rel', $l))) { continue; } - if($l['rel'] === 'magic-public-key' && array_key_exists('href',$l) && $key['public_key'] === EMPTY_STR) { + if ($l['rel'] === 'magic-public-key' && array_key_exists('href', $l) && $key['public_key'] === EMPTY_STR) { $key['public_key'] = self::convertKey($l['href']); } } @@ -336,51 +357,65 @@ class HTTPSig { return (($key['public_key']) ? $key : false); } - static function get_zotfinger_key($id) { + /** + * @brief get a cached key or fetch it with Zotfinger + * + * @param string $id + * @param boolean $force (optional, default false) + * @return boolean|array + * false if no pub key found, otherwise return an array with the public key + */ - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' and hubloc_network = 'zot6'", - dbesc(str_replace('acct:','',$id)), - dbesc($id) - ); + static function get_zotfinger_key($id, $force = false) { + if (!$force) { + $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' and hubloc_network = 'zot6' order by hubloc_id desc", + dbesc(str_replace('acct:', '', $id)), + dbesc($id) + ); - if($x && $x[0]['xchan_pubkey']) { - return [ 'portable_id' => $x[0]['xchan_hash'], 'public_key' => $x[0]['xchan_pubkey'] , 'hubloc' => $x[0] ]; + if ($x) { + $best = Libzot::zot_record_preferred($x); + } + + if ($best && $best['xchan_pubkey']) { + return ['portable_id' => $best['xchan_hash'], 'public_key' => $best['xchan_pubkey'], 'hubloc' => $best]; + } } - $wf = Webfinger::exec($id); - $key = [ 'portable_id' => '', 'public_key' => '', 'hubloc' => [] ]; + $wf = Webfinger::exec($id); + $key = ['portable_id' => '', 'public_key' => '', 'hubloc' => []]; - if($wf) { - if(array_key_exists('properties',$wf) && array_key_exists('https://w3id.org/security/v1#publicKeyPem',$wf['properties'])) { + if ($wf) { + if (array_key_exists('properties', $wf) && array_key_exists('https://w3id.org/security/v1#publicKeyPem', $wf['properties'])) { $key['public_key'] = self::convertKey($wf['properties']['https://w3id.org/security/v1#publicKeyPem']); } - if(array_key_exists('links', $wf) && is_array($wf['links'])) { - foreach($wf['links'] as $l) { - if(! (is_array($l) && array_key_exists('rel',$l))) { + if (array_key_exists('links', $wf) && is_array($wf['links'])) { + foreach ($wf['links'] as $l) { + if (!(is_array($l) && array_key_exists('rel', $l))) { continue; } - if($l['rel'] === 'http://purl.org/zot/protocol/6.0' && array_key_exists('href',$l) && $l['href'] !== EMPTY_STR) { + if ($l['rel'] === 'http://purl.org/zot/protocol/6.0' && array_key_exists('href', $l) && $l['href'] !== EMPTY_STR) { // The third argument to Zotfinger::exec() tells it not to verify signatures // Since we're inside a function that is fetching keys with which to verify signatures, // this is necessary to prevent infinite loops. - $z = \Zotlabs\Lib\Zotfinger::exec($l['href'],null,false); - if($z) { + $z = Zotfinger::exec($l['href'], null, false); + if ($z) { $i = Libzot::import_xchan($z['data']); - if($i['success']) { + if ($i['success']) { $key['portable_id'] = $i['hash']; - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_id_url = '%s' and hubloc_network = 'zot6'", + $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_id_url = '%s' and hubloc_network = 'zot6' order by hubloc_id desc", dbesc($l['href']) ); - if($x) { + if ($x) { $key['hubloc'] = $x[0]; } } } } - if($l['rel'] === 'magic-public-key' && array_key_exists('href',$l) && $key['public_key'] === EMPTY_STR) { + if ($l['rel'] === 'magic-public-key' && array_key_exists('href', $l) && $key['public_key'] === EMPTY_STR) { $key['public_key'] = self::convertKey($l['href']); } } @@ -402,39 +437,39 @@ class HTTPSig { * @param array $encryption [ 'key', 'algorithm' ] or false * @return array */ - static function create_sig($head, $prvkey, $keyid = EMPTY_STR, $auth = false, $alg = 'sha256', $encryption = false ) { + static function create_sig($head, $prvkey, $keyid = EMPTY_STR, $auth = false, $alg = 'sha256', $encryption = false) { $return_headers = []; - if($alg === 'sha256') { + if ($alg === 'sha256') { $algorithm = 'rsa-sha256'; } - if($alg === 'sha512') { + if ($alg === 'sha512') { $algorithm = 'rsa-sha512'; } - $x = self::sign($head,$prvkey,$alg); + $x = self::sign($head, $prvkey, $alg); $headerval = 'keyId="' . $keyid . '",algorithm="' . $algorithm . '",headers="' . $x['headers'] . '",signature="' . $x['signature'] . '"'; - if($encryption) { - $x = Crypto::encapsulate($headerval,$encryption['key'],$encryption['algorithm']); - if(is_array($x)) { + if ($encryption) { + $x = Crypto::encapsulate($headerval, $encryption['key'], $encryption['algorithm']); + if (is_array($x)) { $headerval = 'iv="' . $x['iv'] . '",key="' . $x['key'] . '",alg="' . $x['alg'] . '",data="' . $x['data'] . '"'; } } - if($auth) { + if ($auth) { $sighead = 'Authorization: Signature ' . $headerval; } else { $sighead = 'Signature: ' . $headerval; } - if($head) { - foreach($head as $k => $v) { + if ($head) { + foreach ($head as $k => $v) { // strip the request-target virtual header from the output headers - if($k === '(request-target)') { + if ($k === '(request-target)') { continue; } $return_headers[] = $k . ': ' . $v; @@ -454,8 +489,8 @@ class HTTPSig { static function set_headers($headers) { - if($headers && is_array($headers)) { - foreach($headers as $h) { + if ($headers && is_array($headers)) { + foreach ($headers as $h) { header($h); } } @@ -465,7 +500,7 @@ class HTTPSig { /** * @brief * - * @param array $head + * @param array $head * @param string $prvkey * @param string $alg (optional) default 'sha256' * @return array @@ -478,21 +513,21 @@ class HTTPSig { $headers = ''; $fields = ''; - logger('signing: ' . print_r($head,true), LOGGER_DATA); + logger('signing: ' . print_r($head, true), LOGGER_DATA); - if($head) { - foreach($head as $k => $v) { + if ($head) { + foreach ($head as $k => $v) { $headers .= strtolower($k) . ': ' . trim($v) . "\n"; - if($fields) + if ($fields) $fields .= ' '; $fields .= strtolower($k); } // strip the trailing linefeed - $headers = rtrim($headers,"\n"); + $headers = rtrim($headers, "\n"); } - $sig = base64_encode(Crypto::sign($headers,$prvkey,$alg)); + $sig = base64_encode(Crypto::sign($headers, $prvkey, $alg)); $ret['headers'] = $fields; $ret['signature'] = $sig; @@ -513,26 +548,26 @@ class HTTPSig { static function parse_sigheader($header) { - $ret = []; + $ret = []; $matches = []; // if the header is encrypted, decrypt with (default) site private key and continue - if(preg_match('/iv="(.*?)"/ism',$header,$matches)) + if (preg_match('/iv="(.*?)"/ism', $header, $matches)) $header = self::decrypt_sigheader($header); - if(preg_match('/keyId="(.*?)"/ism',$header,$matches)) + if (preg_match('/keyId="(.*?)"/ism', $header, $matches)) $ret['keyId'] = $matches[1]; - if(preg_match('/algorithm="(.*?)"/ism',$header,$matches)) + if (preg_match('/algorithm="(.*?)"/ism', $header, $matches)) $ret['algorithm'] = $matches[1]; - if(preg_match('/headers="(.*?)"/ism',$header,$matches)) + if (preg_match('/headers="(.*?)"/ism', $header, $matches)) $ret['headers'] = explode(' ', $matches[1]); - if(preg_match('/signature="(.*?)"/ism',$header,$matches)) - $ret['signature'] = base64_decode(preg_replace('/\s+/','',$matches[1])); + if (preg_match('/signature="(.*?)"/ism', $header, $matches)) + $ret['signature'] = base64_decode(preg_replace('/\s+/', '', $matches[1])); - if(($ret['signature']) && ($ret['algorithm']) && (! $ret['headers'])) - $ret['headers'] = [ 'date' ]; + if (($ret['signature']) && ($ret['algorithm']) && (!$ret['headers'])) + $ret['headers'] = ['date']; - return $ret; + return $ret; } @@ -552,23 +587,23 @@ class HTTPSig { $iv = $key = $alg = $data = null; - if(! $prvkey) { + if (!$prvkey) { $prvkey = get_config('system', 'prvkey'); } $matches = []; - if(preg_match('/iv="(.*?)"/ism',$header,$matches)) + if (preg_match('/iv="(.*?)"/ism', $header, $matches)) $iv = $matches[1]; - if(preg_match('/key="(.*?)"/ism',$header,$matches)) + if (preg_match('/key="(.*?)"/ism', $header, $matches)) $key = $matches[1]; - if(preg_match('/alg="(.*?)"/ism',$header,$matches)) + if (preg_match('/alg="(.*?)"/ism', $header, $matches)) $alg = $matches[1]; - if(preg_match('/data="(.*?)"/ism',$header,$matches)) + if (preg_match('/data="(.*?)"/ism', $header, $matches)) $data = $matches[1]; - if($iv && $key && $alg && $data) { - return Crypto::unencapsulate([ 'encrypted' => true, 'iv' => $iv, 'key' => $key, 'alg' => $alg, 'data' => $data ] , $prvkey); + if ($iv && $key && $alg && $data) { + return Crypto::unencapsulate(['encrypted' => true, 'iv' => $iv, 'key' => $key, 'alg' => $alg, 'data' => $data], $prvkey); } return ''; -- cgit v1.2.3