521 lines
14 KiB
PHP
521 lines
14 KiB
PHP
<?php
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require_once('include/crypto.php');
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function get_diaspora_key($uri) {
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$key = '';
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logger('Fetching diaspora key for: ' . $uri);
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$arr = lrdd($uri);
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if(is_array($arr)) {
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foreach($arr as $a) {
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if($a['@attributes']['rel'] === 'diaspora-public-key') {
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$key = base64_decode($a['@attributes']['href']);
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}
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}
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}
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else {
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return '';
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}
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if($key)
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return rsatopem($key);
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return '';
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}
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function diaspora_base_message($type,$data) {
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$tpl = get_markup_template('diaspora_' . $type . '.tpl');
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if(! $tpl)
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return '';
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return replace_macros($tpl,$data);
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}
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function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey) {
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$a = get_app();
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$inner_aes_key = random_string(32);
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$b_inner_aes_key = base64_encode($inner_aes_key);
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$inner_iv = random_string(32);
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$b_inner_iv = base64_encode($inner_iv);
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$outer_aes_key = random_string(32);
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$b_outer_aes_key = base64_encode($outer_aes_key);
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$outer_iv = random_string(32);
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$b_outer_iv = base64_encode($outer_iv);
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$handle = 'acct:' . $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
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$padded_data = pkcs5_pad($msg,16);
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$inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
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$b64_data = base64_encode($inner_encrypted);
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$b64url_data = base64url_encode($b64_data);
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$b64url_stripped = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
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$lines = str_split($b64url_stripped,60);
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$data = implode("\n",$lines);
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$data = $data . (($data[-1] != "\n") ? "\n" : '') ;
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$type = 'application/atom+xml';
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$encoding = 'base64url';
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$alg = 'RSA-SHA256';
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$signable_data = $data . '.' . base64url_encode($type) . "\n" . '.'
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. base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n";
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$signature = rsa_sign($signable_data,$prvkey);
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$sig = base64url_encode($signature);
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$decrypted_header = <<< EOT
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<decrypted_header>
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<iv>$b_inner_iv</iv>
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<aes_key>$b_inner_aes_key</aes_key>
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<author>
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<name>{$contact['name']}</name>
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<uri>$handle</uri>
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</author>
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</decrypted_header>
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EOT;
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$decrypted_header = pkcs5_pad($decrypted_header,16);
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$ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
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$outer_json = json_encode(array('iv' => $b_outer_iv,'key' => $b_outer_aes_key));
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$encrypted_outer_key_bundle = '';
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openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey);
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$b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
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$encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle),
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'ciphertext' => base64_encode($ciphertext)));
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$encrypted_header = '<encrypted_header>' . base64_encode($encrypted_header_json_object) . '</encrypted_header>';
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$magic_env = <<< EOT
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<?xml version='1.0' encoding='UTF-8'?>
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<entry xmlns='http://www.w3.org/2005/Atom'>
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$encrypted_header
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<me:env xmlns:me="http://salmon-protocol.org/ns/magic-env">
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<me:encoding>base64url</me:encoding>
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<me:alg>RSA-SHA256</me:alg>
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<me:data type="application/atom+xml">$data</me:data>
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<me:sig>$sig</me:sig>
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</me:env>
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</entry>
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EOT;
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return $magic_env;
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}
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function diaspora_decode($importer,$xml) {
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$basedom = parse_xml_string($xml);
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$atom = $basedom->children(NAMESPACE_ATOM1);
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$encrypted_header = json_decode(base64_decode($atom->encrypted_header));
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$encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
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$ciphertext = base64_decode($encrypted_header->ciphertext);
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$outer_key_bundle = '';
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openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
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$j_outer_key_bundle = json_decode($outer_key_bundle);
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$outer_iv = base64_decode($j_outer_key_bundle->iv);
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$outer_key = base64_decode($j_outer_key_bundle->key);
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$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
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$decrypted = pkcs5_unpad($decrypted);
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/**
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* $decrypted now contains something like
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*
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* <decrypted_header>
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* <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
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* <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
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* <author>
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* <name>Ryan Hughes</name>
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* <uri>acct:galaxor@diaspora.pirateship.org</uri>
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* </author>
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* </decrypted_header>
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*/
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$idom = parse_xml_string($decrypted,false);
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$inner_iv = base64_decode($idom->iv);
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$inner_aes_key = base64_decode($idom->aes_key);
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$author_link = str_replace('acct:','',$idom->author->uri);
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$dom = $basedom->children(NAMESPACE_SALMON_ME);
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// figure out where in the DOM tree our data is hiding
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if($dom->provenance->data)
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$base = $dom->provenance;
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elseif($dom->env->data)
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$base = $dom->env;
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elseif($dom->data)
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$base = $dom;
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if(! $base) {
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logger('mod-diaspora: unable to locate salmon data in xml ');
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dt_return(400);
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}
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// Stash the signature away for now. We have to find their key or it won't be good for anything.
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$signature = base64url_decode($base->sig);
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// unpack the data
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// strip whitespace so our data element will return to one big base64 blob
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$data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
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// Add back the 60 char linefeeds
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$lines = str_split($data,60);
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$data = implode("\n",$lines);
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// stash away some other stuff for later
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$type = $base->data[0]->attributes()->type[0];
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$keyhash = $base->sig[0]->attributes()->keyhash[0];
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$encoding = $base->encoding;
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$alg = $base->alg;
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$signed_data = $data . (($data[-1] != "\n") ? "\n" : '') . '.' . base64url_encode($type) . "\n" . '.' . base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n";
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// decode the data
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$data = base64url_decode($data);
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// Now pull out the inner encrypted blob
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$inner_encrypted = base64_decode($data);
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$inner_decrypted =
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$inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
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$inner_decrypted = pkcs5_unpad($inner_decrypted);
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if(! $author_link) {
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logger('mod-diaspora: Could not retrieve author URI.');
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http_status_exit(400);
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}
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// Once we have the author URI, go to the web and try to find their public key
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// *** or look it up locally ***
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logger('mod-diaspora: Fetching key for ' . $author_link );
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// Get diaspora public key (pkcs#1) and convert to pkcs#8
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$key = get_diaspora_key($author_link);
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if(! $key) {
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logger('mod-diaspora: Could not retrieve author key.');
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http_status_exit(400);
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}
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$verify = rsa_verify($signed_data,$signature,$key);
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if(! $verify) {
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logger('mod-diaspora: Message did not verify. Discarding.');
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http_status_exit(400);
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}
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logger('mod-diaspora: Message verified.');
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return $inner_decrypted;
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}
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function diaspora_request($importer,$contact,$xml) {
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$sender_handle = $xml->sender_handle;
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$recipient_handle = $xml->recipient_handle;
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if(! $sender_handle || ! $recipient_handle)
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return;
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if($contact && ($contact['rel'] == CONTACT_IS_FOLLOWER || $contact['rel'] == CONTACT_IS_FRIEND)) {
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q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d AND `uid` = %d LIMIT 1",
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intval(CONTACT_IS_FRIEND),
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intval($contact['id']),
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intval($importer['uid'])
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);
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// send notification
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return;
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}
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require_once('include/Scrape.php');
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$ret = probe_url($sender_handle);
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if((! count($ret)) || ($ret['network'] != NETWORK_DIASPORA)) {
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logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle);
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return;
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}
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$r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
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VALUES ( %d, '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s',%d,%d) ",
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intval($importer['uid']),
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dbesc($ret['network']),
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dbesc($ret['addr']),
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datetime_convert(),
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dbesc($ret['url']),
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dbesc($ret['name']),
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dbesc($ret['nick']),
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dbesc($ret['photo']),
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dbesc($ret['pubkey']),
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dbesc($ret['notify']),
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dbesc($ret['poll']),
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1,
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2
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);
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// find the contact record we just created
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$contact_record = null;
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if($r) {
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$r = q("SELECT `id` FROM `contact`
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WHERE `uid` = %d AND `addr` = '%s' AND `poll` = '%s' LIMIT 1",
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intval($importer['uid']),
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$ret['addr'],
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$ret['poll']
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);
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if(count($r))
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$contact_record = $r[0];
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}
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$hash = random_string() . (string) time(); // Generate a confirm_key
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if(is_array($contact_record)) {
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$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
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VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
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intval($importer['uid']),
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intval($contact_record['id']),
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0,
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dbesc( t('Sharing notification from Diaspora network')),
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dbesc($hash),
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dbesc(datetime_convert())
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);
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}
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return;
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}
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function diaspora_post($importer,$contact,$xml) {
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$guid = notags(unxmlify($xml->guid));
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$diaspora_handle = notags(unxmlify($xml->diaspora_handle));
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$message_id = $diaspora_handle . ':' . $guid;
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$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
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intval($importer['uid']),
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dbesc($message_id),
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dbesc($guid)
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);
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if(count($r))
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return;
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// allocate a guid on our system - we aren't fixing any collisions.
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// we're ignoring them
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$g = q("select * from guid where guid = '%s' limit 1",
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dbesc($guid)
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);
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if(! count($g)) {
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q("insert into guid ( guid ) values ( '%s' )",
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dbesc($guid)
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);
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}
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$created = unxmlify($xml->created_at);
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$private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
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$body = unxmlify($xml->raw_message);
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require_once('library/HTMLPurifier.auto.php');
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require_once('include/html2bbcode.php');
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$maxlen = get_max_import_size();
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if($maxlen && (strlen($body) > $maxlen))
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$body = substr($body,0, $maxlen);
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if((strpos($body,'<') !== false) || (strpos($body,'>') !== false)) {
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$body = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
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'[youtube]$1[/youtube]', $body);
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$body = preg_replace('#<iframe[^>].+?' . 'http://www.youtube.com/embed/([A-Za-z0-9\-_=]+).+?</iframe>#s',
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'[youtube]$1[/youtube]', $body);
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$body = oembed_html2bbcode($body);
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$config = HTMLPurifier_Config::createDefault();
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$config->set('Cache.DefinitionImpl', null);
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$purifier = new HTMLPurifier($config);
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$body = $purifier->purify($body);
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$body = html2bbcode($body);
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}
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$datarray = array();
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$datarray['uid'] = $importer['uid'];
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$datarray['contact-id'] = $contact['id'];
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$datarray['wall'] = 0;
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$datarray['guid'] = $guid;
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$datarray['uri'] = $message_id;
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$dattarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
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$dattarray['private'] = $private;
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$dattarray['parent'] = 0;
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$datarray['owner-name'] = $contact['name'];
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$datarray['owner-link'] = $contact['url'];
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$datarray['owner-avatar'] = $contact['thumb'];
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$datarray['author-name'] = $contact['name'];
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$datarray['author-link'] = $contact['url'];
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$datarray['author-avatar'] = $contact['thumb'];
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item_store($datarray);
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return;
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}
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function diaspora_comment($importer,$contact,$xml) {
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$guid = notags(unxmlify($xml->guid));
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$diaspora_handle = notags(unxmlify($xml->diaspora_handle));
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$message_id = $diaspora_handle . ':' . $guid;
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$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
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intval($importer['uid']),
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dbesc($message_id),
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dbesc($guid)
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);
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if(count($r))
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return;
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$owner = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
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intval($importer['uid'])
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);
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if(! count($owner))
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return;
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$created = unxmlify($xml->created_at);
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$private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
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}
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function diaspora_like($importer,$contact,$xml) {
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$guid = notags(unxmlify($xml->guid));
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$diaspora_handle = notags(unxmlify($xml->diaspora_handle));
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$message_id = $diaspora_handle . ':' . $guid;
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$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
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intval($importer['uid']),
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dbesc($message_id),
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dbesc($guid)
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);
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if(count($r))
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return;
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$owner = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
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intval($importer['uid'])
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);
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if(! count($owner))
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return;
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$created = unxmlify($xml->created_at);
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$private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
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$uri = item_new_uri($a->get_hostname(),$owner_uid);
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$post_type = (($item['resource-id']) ? t('photo') : t('status'));
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$objtype = (($item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
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$link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id'] . '" />' . "\n") ;
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$body = $item['body'];
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$obj = <<< EOT
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<object>
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<type>$objtype</type>
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<local>1</local>
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<id>{$item['uri']}</id>
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<link>$link</link>
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<title></title>
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<content>$body</content>
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</object>
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EOT;
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if($verb === 'like')
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$bodyverb = t('%1$s likes %2$s\'s %3$s');
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if($verb === 'dislike')
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$bodyverb = t('%1$s doesn\'t like %2$s\'s %3$s');
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if(! isset($bodyverb))
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return;
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$arr = array();
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$arr['uri'] = $uri;
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$arr['uid'] = $owner_uid;
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$arr['contact-id'] = $contact['id'];
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$arr['type'] = 'activity';
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$arr['wall'] = 1;
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$arr['gravity'] = GRAVITY_LIKE;
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$arr['parent'] = $item['id'];
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$arr['parent-uri'] = $item['uri'];
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$arr['owner-name'] = $owner['name'];
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$arr['owner-link'] = $owner['url'];
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$arr['owner-avatar'] = $owner['thumb'];
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$arr['author-name'] = $contact['name'];
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$arr['author-link'] = $contact['url'];
|
|
$arr['author-avatar'] = $contact['thumb'];
|
|
|
|
$ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
|
|
$alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
|
|
$plink = '[url=' . $a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
|
|
$arr['body'] = sprintf( $bodyverb, $ulink, $alink, $plink );
|
|
|
|
$arr['verb'] = $activity;
|
|
$arr['object-type'] = $objtype;
|
|
$arr['object'] = $obj;
|
|
$arr['allow_cid'] = $item['allow_cid'];
|
|
$arr['allow_gid'] = $item['allow_gid'];
|
|
$arr['deny_cid'] = $item['deny_cid'];
|
|
$arr['deny_gid'] = $item['deny_gid'];
|
|
$arr['visible'] = 1;
|
|
$arr['unseen'] = 1;
|
|
$arr['last-child'] = 0;
|
|
|
|
$post_id = item_store($arr);
|
|
|
|
if(! $item['visible']) {
|
|
$r = q("UPDATE `item` SET `visible` = 1 WHERE `id` = %d AND `uid` = %d LIMIT 1",
|
|
intval($item['id']),
|
|
intval($owner_uid)
|
|
);
|
|
}
|
|
|
|
$arr['id'] = $post_id;
|
|
|
|
|
|
|
|
}
|
|
|
|
function diaspora_retraction($importer,$contact,$xml) {
|
|
|
|
}
|
|
|