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-rw-r--r--Zotlabs/Zot6/HTTPSig.php536
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 '';
- }
-
-}