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Diffstat (limited to 'Zotlabs/Zot6/HTTPSig.php')
| -rw-r--r-- | Zotlabs/Zot6/HTTPSig.php | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/Zotlabs/Zot6/HTTPSig.php b/Zotlabs/Zot6/HTTPSig.php deleted file mode 100644 index d3a09b858..000000000 --- a/Zotlabs/Zot6/HTTPSig.php +++ /dev/null @@ -1,536 +0,0 @@ -<?php - -namespace Zotlabs\Zot6; - -use Zotlabs\Lib\ActivityStreams; -use Zotlabs\Lib\Webfinger; -use Zotlabs\Web\HTTPHeaders; -use Zotlabs\Lib\Libzot; - -/** - * @brief Implements HTTP Signatures per draft-cavage-http-signatures-10. - * - * @see https://tools.ietf.org/html/draft-cavage-http-signatures-10 - */ - -class HTTPSig { - - /** - * @brief RFC5843 - * - * @see https://tools.ietf.org/html/rfc5843 - * - * @param string $body The value to create the digest for - * @param string $alg hash algorithm (one of 'sha256','sha512') - * @return string The generated digest header string for $body - */ - - static function generate_digest_header($body,$alg = 'sha256') { - - $digest = base64_encode(hash($alg, $body, true)); - switch($alg) { - case 'sha512': - return 'SHA-512=' . $digest; - case 'sha256': - default: - return 'SHA-256=' . $digest; - break; - } - } - - static function find_headers($data,&$body) { - - // decide if $data arrived via controller submission or curl - - if(is_array($data) && $data['header']) { - if(! $data['success']) - return []; - - $h = new HTTPHeaders($data['header']); - $headers = $h->fetcharr(); - $body = $data['body']; - $headers['(request-target)'] = $data['request_target']; - } - - else { - $headers = []; - $headers['(request-target)'] = strtolower($_SERVER['REQUEST_METHOD']) . ' ' . $_SERVER['REQUEST_URI']; - $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))); - $headers[$field] = $v; - } - } - } - - //logger('SERVER: ' . print_r($_SERVER,true), LOGGER_ALL); - - //logger('headers: ' . print_r($headers,true), LOGGER_ALL); - - return $headers; - } - - - // See draft-cavage-http-signatures-10 - - static function verify($data,$key = '') { - - $body = $data; - $headers = null; - - $result = [ - 'signer' => '', - 'portable_id' => '', - 'header_signed' => false, - 'header_valid' => false, - 'content_signed' => false, - 'content_valid' => false - ]; - - - $headers = self::find_headers($data,$body); - - if(! $headers) - return $result; - - $sig_block = null; - - if(array_key_exists('signature',$headers)) { - $sig_block = self::parse_sigheader($headers['signature']); - } - elseif(array_key_exists('authorization',$headers)) { - $sig_block = self::parse_sigheader($headers['authorization']); - } - - if(! $sig_block) { - logger('no signature provided.', LOGGER_DEBUG); - return $result; - } - - // Warning: This log statement includes binary data - // logger('sig_block: ' . print_r($sig_block,true), LOGGER_DATA); - - $result['header_signed'] = true; - - $signed_headers = $sig_block['headers']; - if(! $signed_headers) - $signed_headers = [ 'date' ]; - - $signed_data = ''; - foreach($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) { - logger('bad time: ' . $c); - return $result; - } - } - } - $signed_data = rtrim($signed_data,"\n"); - - $algorithm = null; - if($sig_block['algorithm'] === 'rsa-sha256') { - $algorithm = 'sha256'; - } - if($sig_block['algorithm'] === 'rsa-sha512') { - $algorithm = 'sha512'; - } - - if(! array_key_exists('keyId',$sig_block)) - return $result; - - $result['signer'] = $sig_block['keyId']; - - $key = self::get_key($key,$result['signer']); - - if(! ($key && $key['public_key'])) { - return $result; - } - - $x = rsa_verify($signed_data,$sig_block['signature'],$key['public_key'],$algorithm); - - logger('verified: ' . $x, LOGGER_DEBUG); - - if(! $x) { - logger('verify failed for ' . $result['signer'] . ' alg=' . $algorithm . (($key['public_key']) ? '' : ' no key')); - $sig_block['signature'] = base64_encode($sig_block['signature']); - logger('affected sigblock: ' . print_r($sig_block,true)); - logger('signed_data: ' . print_r($signed_data,true)); - logger('headers: ' . print_r($headers,true)); - logger('server: ' . print_r($_SERVER,true)); - return $result; - } - - $result['portable_id'] = $key['portable_id']; - $result['header_valid'] = true; - - if(in_array('digest',$signed_headers)) { - $result['content_signed'] = true; - $digest = explode('=', $headers['digest'], 2); - if($digest[0] === 'SHA-256') - $hashalg = 'sha256'; - if($digest[0] === 'SHA-512') - $hashalg = 'sha512'; - - if(base64_encode(hash($hashalg,$body,true)) === $digest[1]) { - $result['content_valid'] = true; - } - - logger('Content_Valid: ' . (($result['content_valid']) ? 'true' : 'false')); - } - - return $result; - } - - static function get_key($key,$id) { - - if($key) { - if(function_exists($key)) { - return $key($id); - } - return [ 'public_key' => $key ]; - } - - if(strpos($id,'#') === false) { - $key = self::get_webfinger_key($id); - } - - if(! $key) { - $key = self::get_activitystreams_key($id); - } - - return $key; - - } - - - function convertKey($key) { - - if(strstr($key,'RSA ')) { - return rsatopem($key); - } - elseif(substr($key,0,5) === 'data:') { - return convert_salmon_key($key); - } - else { - return $key; - } - - } - - - /** - * @brief - * - * @param string $id - * @return boolean|string - * false if no pub key found, otherwise return the pub key - */ - - function get_activitystreams_key($id) { - - // remove fragment - - $url = ((strpos($id,'#')) ? substr($id,0,strpos($id,'#')) : $id); - - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' limit 1", - dbesc(str_replace('acct:','',$url)), - dbesc($url) - ); - - if($x && $x[0]['xchan_pubkey']) { - return [ 'portable_id' => $x[0]['xchan_hash'], 'public_key' => $x[0]['xchan_pubkey'] , 'hubloc' => $x[0] ]; - } - - $r = ActivityStreams::fetch($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' => $portable_id, 'hubloc' => [] ]; - } - } - } - return false; - } - - - function get_webfinger_key($id) { - - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' limit 1", - dbesc(str_replace('acct:','',$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] ]; - } - - $wf = Webfinger::exec($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'])) { - $key['public_key'] = self::convertKey($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',$l))) { - continue; - } - if($l['rel'] === 'magic-public-key' && array_key_exists('href',$l) && $key['public_key'] === EMPTY_STR) { - $key['public_key'] = self::convertKey($l['href']); - } - } - } - } - - return (($key['public_key']) ? $key : false); - } - - - function get_zotfinger_key($id) { - - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_addr = '%s' or hubloc_id_url = '%s' limit 1", - dbesc(str_replace('acct:','',$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] ]; - } - - $wf = Webfinger::exec($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'])) { - $key['public_key'] = self::convertKey($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',$l))) { - continue; - } - if($l['rel'] === 'http://purl.org/zot/protocol/6.0' && array_key_exists('href',$l) && $l['href'] !== EMPTY_STR) { - $z = \Zotlabs\Lib\Zotfinger::exec($l['href']); - if($z) { - $i = Libzot::import_xchan($z['data']); - if($i['success']) { - $key['portable_id'] = $i['hash']; - - $x = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_id_url = '%s' limit 1", - dbesc($l['href']) - ); - if($x) { - $key['hubloc'] = $x[0]; - } - } - } - } - if($l['rel'] === 'magic-public-key' && array_key_exists('href',$l) && $key['public_key'] === EMPTY_STR) { - $key['public_key'] = self::convertKey($l['href']); - } - } - } - } - - return (($key['public_key']) ? $key : false); - } - - - /** - * @brief - * - * @param array $head - * @param string $prvkey - * @param string $keyid (optional, default '') - * @param boolean $auth (optional, default false) - * @param string $alg (optional, default 'sha256') - * @param array $encryption [ 'key', 'algorithm' ] or false - * @return array - */ - static function create_sig($head, $prvkey, $keyid = EMPTY_STR, $auth = false, $alg = 'sha256', $encryption = false ) { - - $return_headers = []; - - if($alg === 'sha256') { - $algorithm = 'rsa-sha256'; - } - if($alg === 'sha512') { - $algorithm = 'rsa-sha512'; - } - - $x = self::sign($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)) { - $headerval = 'iv="' . $x['iv'] . '",key="' . $x['key'] . '",alg="' . $x['alg'] . '",data="' . $x['data'] . '"'; - } - } - - if($auth) { - $sighead = 'Authorization: Signature ' . $headerval; - } - else { - $sighead = 'Signature: ' . $headerval; - } - - if($head) { - foreach($head as $k => $v) { - // strip the request-target virtual header from the output headers - if($k === '(request-target)') { - continue; - } - $return_headers[] = $k . ': ' . $v; - } - } - $return_headers[] = $sighead; - - return $return_headers; - } - - /** - * @brief set headers - * - * @param array $headers - * @return void - */ - - - static function set_headers($headers) { - if($headers && is_array($headers)) { - foreach($headers as $h) { - header($h); - } - } - } - - - /** - * @brief - * - * @param array $head - * @param string $prvkey - * @param string $alg (optional) default 'sha256' - * @return array - */ - - static function sign($head, $prvkey, $alg = 'sha256') { - - $ret = []; - - $headers = ''; - $fields = ''; - - logger('signing: ' . print_r($head,true), LOGGER_DATA); - - if($head) { - foreach($head as $k => $v) { - $headers .= strtolower($k) . ': ' . trim($v) . "\n"; - if($fields) - $fields .= ' '; - - $fields .= strtolower($k); - } - // strip the trailing linefeed - $headers = rtrim($headers,"\n"); - } - - $sig = base64_encode(rsa_sign($headers,$prvkey,$alg)); - - $ret['headers'] = $fields; - $ret['signature'] = $sig; - - return $ret; - } - - /** - * @brief - * - * @param string $header - * @return array associate array with - * - \e string \b keyID - * - \e string \b algorithm - * - \e array \b headers - * - \e string \b signature - */ - - static function parse_sigheader($header) { - - $ret = []; - $matches = []; - - // if the header is encrypted, decrypt with (default) site private key and continue - - if(preg_match('/iv="(.*?)"/ism',$header,$matches)) - $header = self::decrypt_sigheader($header); - - if(preg_match('/keyId="(.*?)"/ism',$header,$matches)) - $ret['keyId'] = $matches[1]; - if(preg_match('/algorithm="(.*?)"/ism',$header,$matches)) - $ret['algorithm'] = $matches[1]; - if(preg_match('/headers="(.*?)"/ism',$header,$matches)) - $ret['headers'] = explode(' ', $matches[1]); - if(preg_match('/signature="(.*?)"/ism',$header,$matches)) - $ret['signature'] = base64_decode(preg_replace('/\s+/','',$matches[1])); - - if(($ret['signature']) && ($ret['algorithm']) && (! $ret['headers'])) - $ret['headers'] = [ 'date' ]; - - return $ret; - } - - - /** - * @brief - * - * @param string $header - * @param string $prvkey (optional), if not set use site private key - * @return array|string associative array, empty string if failue - * - \e string \b iv - * - \e string \b key - * - \e string \b alg - * - \e string \b data - */ - - static function decrypt_sigheader($header, $prvkey = null) { - - $iv = $key = $alg = $data = null; - - if(! $prvkey) { - $prvkey = get_config('system', 'prvkey'); - } - - $matches = []; - - if(preg_match('/iv="(.*?)"/ism',$header,$matches)) - $iv = $matches[1]; - if(preg_match('/key="(.*?)"/ism',$header,$matches)) - $key = $matches[1]; - if(preg_match('/alg="(.*?)"/ism',$header,$matches)) - $alg = $matches[1]; - if(preg_match('/data="(.*?)"/ism',$header,$matches)) - $data = $matches[1]; - - if($iv && $key && $alg && $data) { - return crypto_unencapsulate([ 'encrypted' => true, 'iv' => $iv, 'key' => $key, 'alg' => $alg, 'data' => $data ] , $prvkey); - } - - return ''; - } - -} |