diff options
Diffstat (limited to 'include/diaspora.php')
| -rwxr-xr-x | include/diaspora.php | 2811 |
1 files changed, 2811 insertions, 0 deletions
diff --git a/include/diaspora.php b/include/diaspora.php new file mode 100755 index 000000000..e494aac0f --- /dev/null +++ b/include/diaspora.php @@ -0,0 +1,2811 @@ +<?php + +require_once('include/crypto.php'); +require_once('include/items.php'); +require_once('include/bb2diaspora.php'); +require_once('include/contact_selectors.php'); +//require_once('include/queue_fn.php'); +//require_once('include/lock.php'); + +function diaspora_dispatch_public($msg) { + + $enabled = intval(get_config('system','diaspora_enabled')); + if(! $enabled) { + logger('mod-diaspora: disabled'); + return; + } + + // find everybody following or allowing this author + + + $r = q("SELECT * from channel where channel_id in ( SELECT abook_channel from abook left join xchan on abook_xchan = xchan_hash WHERE xchan_network like '%%diaspora%%' and xchan_addr = '%s' )", + dbesc($msg['author']) + ); + + // also need to look for those following public streams + + if($r) { + foreach($r as $rr) { + logger('diaspora_public: delivering to: ' . $rr['channel_name'] . ' (' . $rr['channel_address'] . ') '); + diaspora_dispatch($rr,$msg); + } + } + else + logger('diaspora_public: no subscribers'); +} + + + +function diaspora_dispatch($importer,$msg,$attempt=1) { + + $ret = 0; + + $enabled = intval(get_config('system','diaspora_enabled')); + if(! $enabled) { + logger('mod-diaspora: disabled'); + return; + } + + // php doesn't like dashes in variable names + + $msg['message'] = str_replace( + array('<activity_streams-photo>','</activity_streams-photo>'), + array('<asphoto>','</asphoto>'), + $msg['message']); + + + $parsed_xml = parse_xml_string($msg['message'],false); + + $xmlbase = $parsed_xml->post; + +// logger('diaspora_dispatch: ' . print_r($xmlbase,true), LOGGER_DATA); + + + if($xmlbase->request) { + $ret = diaspora_request($importer,$xmlbase->request); + } + elseif($xmlbase->status_message) { + $ret = diaspora_post($importer,$xmlbase->status_message,$msg); + } + elseif($xmlbase->profile) { + $ret = diaspora_profile($importer,$xmlbase->profile,$msg); + } + elseif($xmlbase->comment) { + $ret = diaspora_comment($importer,$xmlbase->comment,$msg); + } + elseif($xmlbase->like) { + $ret = diaspora_like($importer,$xmlbase->like,$msg); + } + elseif($xmlbase->asphoto) { + $ret = diaspora_asphoto($importer,$xmlbase->asphoto,$msg); + } + elseif($xmlbase->reshare) { + $ret = diaspora_reshare($importer,$xmlbase->reshare,$msg); + } + elseif($xmlbase->retraction) { + $ret = diaspora_retraction($importer,$xmlbase->retraction,$msg); + } + elseif($xmlbase->signed_retraction) { + $ret = diaspora_signed_retraction($importer,$xmlbase->signed_retraction,$msg); + } + elseif($xmlbase->relayable_retraction) { + $ret = diaspora_signed_retraction($importer,$xmlbase->relayable_retraction,$msg); + } + elseif($xmlbase->photo) { + $ret = diaspora_photo($importer,$xmlbase->photo,$msg,$attempt); + } + elseif($xmlbase->conversation) { + $ret = diaspora_conversation($importer,$xmlbase->conversation,$msg); + } + elseif($xmlbase->message) { + $ret = diaspora_message($importer,$xmlbase->message,$msg); + } + else { + logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true)); + } + return $ret; +} + + +function diaspora_is_blacklisted($s) { + + $bl1 = get_config('system','blacklisted_sites'); + if(is_array($bl1) && $bl1) { + foreach($bl1 as $bl) { + if($bl && strpos($s,$bl) !== false) { + logger('diaspora_is_blacklisted: blacklisted ' . $s); + return true; + } + } + } + return false; +} + +function diaspora_process_outbound($arr) { + +/* + + We are passed the following array from the notifier, providing everything we need to make delivery decisions. + + diaspora_process_outbound(array( + 'channel' => $channel, + 'env_recips' => $env_recips, + 'recipients' => $recipients, + 'item' => $item, + 'target_item' => $target_item, + 'hub' => $hub, + 'top_level_post' => $top_level_post, + 'private' => $private, + 'followup' => $followup, + 'relay_to_owner' => $relay_to_owner, + 'uplink' => $uplink, + 'cmd' => $cmd, + 'expire' => $expire, + 'mail' => $mail, + 'location' => $location, + 'fsuggest' => $fsuggest, + 'normal_mode' => $normal_mode, + 'packet_type' => $packet_type, + 'walltowall' => $walltowall, + )); +*/ + + + if($arr['location']) + return; + + + $target_item = $arr['target_item']; + + if($target_item && array_key_exists('item_flags',$target_item) && ($target_item['item_flags'] & ITEM_OBSCURED)) { + $key = get_config('system','prvkey'); + if($target_item['title']) + $target_item['title'] = crypto_unencapsulate(json_decode($target_item['title'],true),$key); + if($target_item['body']) + $target_item['body'] = crypto_unencapsulate(json_decode($target_item['body'],true),$key); + } + + + + if($arr['env_recips']) { + $hashes = array(); + + // re-explode the recipients, but only for this hub/pod + + foreach($arr['env_recips'] as $recip) + $hashes[] = "'" . $recip['hash'] . "'"; + + $r = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where hubloc_url = '%s' + and xchan_hash in (" . implode(',', $hashes) . ") and xchan_network in ('diaspora', 'friendica-over-diaspora') ", + dbesc($arr['hub']['hubloc_url']) + ); + + if(! $r) { + logger('diaspora_process_outbound: no recipients'); + return; + } + + foreach($r as $contact) { + + if($arr['mail']) { + diaspora_send_mail($arr['item'],$arr['channel'],$contact); + continue; + } + + if(! $arr['normal_mode']) + continue; + + // special handling for followup to public post + // all other public posts processed as public batches further below + + if((! $arr['private']) && ($arr['followup'])) { + diaspora_send_followup($target_item,$arr['channel'],$contact, true); + continue; + } + + if(! $contact['xchan_pubkey']) + continue; + + if(($target_item['item_restrict'] & ITEM_DELETED) + && (($target_item['mid'] === $target_item['parent_mid']) || $arr['followup'])) { + // send both top-level retractions and relayable retractions for owner to relay + diaspora_send_retraction($target_item,$arr['channel'],$contact); + continue; + } + elseif($arr['followup']) { + // send comments and likes to owner to relay + diaspora_send_followup($target_item,$arr['channel'],$contact); + continue; + } + + elseif($target_item['mid'] !== $target_item['parent_mid']) { + // we are the relay - send comments, likes and relayable_retractions + // (of comments and likes) to our conversants + diaspora_send_relay($target_item,$arr['channel'],$contact); + continue; + } + elseif($arr['top_level_post']) { + diaspora_send_status($target_item,$arr['channel'],$contact); + continue; + } + } + } + else { + // public message + + $contact = $arr['hub']; + + if(($target_item['deleted']) + && ($target_item['mid'] === $target_item['parent_mod'])) { + // top-level retraction + logger('delivery: diaspora retract: ' . $loc); + diaspora_send_retraction($target_item,$arr['channel'],$contact,true); + return; + } + elseif($target_item['mid'] !== $target_item['parent_mid']) { + // we are the relay - send comments, likes and relayable_retractions to our conversants + logger('delivery: diaspora relay: ' . $loc); + diaspora_send_relay($target_item,$arr['channel'],$contact,true); + return; + } + elseif($arr['top_level_post']) { + logger('delivery: diaspora status: ' . $loc); + diaspora_send_status($target_item,$arr['channel'],$contact,true); + return; + } + + } + +} + + + + +function diaspora_handle_from_contact($contact_hash) { + + logger("diaspora_handle_from_contact: contact id is " . $contact_hash, LOGGER_DEBUG); + + $r = q("SELECT xchan_addr from xchan where xchan_hash = '%s' limit 1", + dbesc($contact_hash) + ); + if($r) { + return $r[0]['xchan_addr']; + } + return false; +} + +function diaspora_get_contact_by_handle($uid,$handle) { + + if(diaspora_is_blacklisted($handle)) + return false; + + $r = q("SELECT * FROM abook left join xchan on xchan_hash = abook_xchan where xchan_addr = '%s' and abook_channel = %d limit 1", + dbesc($handle), + intval($uid) + ); + return (($r) ? $r[0] : false); +} + +function find_diaspora_person_by_handle($handle) { + + $person = false; + + if(diaspora_is_blacklisted($handle)) + return false; + + $r = q("select * from xchan where xchan_addr = '%s' limit 1", + dbesc($handle) + ); + if($r) { + $person = $r[0]; + logger('find_diaspora_person_by handle: in cache ' . print_r($r,true), LOGGER_DATA); + } + + if(! $person) { + + // try webfinger. Make sure to distinguish between diaspora, + // redmatrix w/diaspora protocol and friendica w/diaspora protocol. + + $result = discover_by_webbie($handle); + if($result) { + $r = q("select * from xchan where xchan_addr = '%s' limit 1", + dbesc($handle) + ); + if($r) { + $person = $r[0]; + logger('find_diaspora_person_by handle: discovered ' . print_r($r,true), LOGGER_DATA); + } + } + } + + return $person; +} + + +function get_diaspora_key($handle) { + logger('Fetching diaspora key for: ' . $handle, LOGGER_DEBUG); + $r = find_diaspora_person_by_handle($handle); + return(($r) ? $r['xchan_pubkey'] : ''); +} + + +function diaspora_pubmsg_build($msg,$channel,$contact,$prvkey,$pubkey) { + + $a = get_app(); + + logger('diaspora_pubmsg_build: ' . $msg, LOGGER_DATA); + + $handle = $channel['channel_address'] . '@' . get_app()->get_hostname(); + + + $b64url_data = base64url_encode($msg,false); + + $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data); + + $type = 'application/xml'; + $encoding = 'base64url'; + $alg = 'RSA-SHA256'; + + $signable_data = $data . '.' . base64url_encode($type,false) . '.' + . base64url_encode($encoding,false) . '.' . base64url_encode($alg,false) ; + + $signature = rsa_sign($signable_data,$prvkey); + $sig = base64url_encode($signature,false); + +$magic_env = <<< EOT +<?xml version='1.0' encoding='UTF-8'?> +<diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" > + <header> + <author_id>$handle</author_id> + </header> + <me:env> + <me:encoding>base64url</me:encoding> + <me:alg>RSA-SHA256</me:alg> + <me:data type="application/xml">$data</me:data> + <me:sig>$sig</me:sig> + </me:env> +</diaspora> +EOT; + + logger('diaspora_pubmsg_build: magic_env: ' . $magic_env, LOGGER_DATA); + return $magic_env; + +} + + + + +function diaspora_msg_build($msg,$channel,$contact,$prvkey,$pubkey,$public = false) { + $a = get_app(); + + if($public) + return diaspora_pubmsg_build($msg,$channel,$contact,$prvkey,$pubkey); + + logger('diaspora_msg_build: ' . $msg, LOGGER_DATA); + + // without a public key nothing will work + + if(! $pubkey) { + logger('diaspora_msg_build: pubkey missing: contact id: ' . $contact['abook_id']); + return ''; + } + + $inner_aes_key = random_string(32); + $b_inner_aes_key = base64_encode($inner_aes_key); + $inner_iv = random_string(16); + $b_inner_iv = base64_encode($inner_iv); + + $outer_aes_key = random_string(32); + $b_outer_aes_key = base64_encode($outer_aes_key); + $outer_iv = random_string(16); + $b_outer_iv = base64_encode($outer_iv); + + $handle = $channel['channel_address'] . '@' . get_app()->get_hostname(); + + $padded_data = pkcs5_pad($msg,16); + $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv); + + $b64_data = base64_encode($inner_encrypted); + + + $b64url_data = base64url_encode($b64_data,false); + $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data); + + $type = 'application/xml'; + $encoding = 'base64url'; + $alg = 'RSA-SHA256'; + + $signable_data = $data . '.' . base64url_encode($type,false) . '.' + . base64url_encode($encoding,false) . '.' . base64url_encode($alg,false) ; + + logger('diaspora_msg_build: signable_data: ' . $signable_data, LOGGER_DATA); + + $signature = rsa_sign($signable_data,$prvkey); + $sig = base64url_encode($signature,false); + +$decrypted_header = <<< EOT +<decrypted_header> + <iv>$b_inner_iv</iv> + <aes_key>$b_inner_aes_key</aes_key> + <author_id>$handle</author_id> +</decrypted_header> +EOT; + + $decrypted_header = pkcs5_pad($decrypted_header,16); + + $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv); + + $outer_json = json_encode(array('iv' => $b_outer_iv,'key' => $b_outer_aes_key)); + + $encrypted_outer_key_bundle = ''; + openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey); + + $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle); + + logger('outer_bundle: ' . $b64_encrypted_outer_key_bundle . ' key: ' . $pubkey, LOGGER_DATA); + + $encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle), + 'ciphertext' => base64_encode($ciphertext))); + $cipher_json = base64_encode($encrypted_header_json_object); + + $encrypted_header = '<encrypted_header>' . $cipher_json . '</encrypted_header>'; + +$magic_env = <<< EOT +<?xml version='1.0' encoding='UTF-8'?> +<diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" > + $encrypted_header + <me:env> + <me:encoding>base64url</me:encoding> + <me:alg>RSA-SHA256</me:alg> + <me:data type="application/xml">$data</me:data> + <me:sig>$sig</me:sig> + </me:env> +</diaspora> +EOT; + + logger('diaspora_msg_build: magic_env: ' . $magic_env, LOGGER_DATA); + return $magic_env; + +} + +/** + * + * diaspora_decode($importer,$xml) + * array $importer -> from user table + * string $xml -> urldecoded Diaspora salmon + * + * Returns array + * 'message' -> decoded Diaspora XML message + * 'author' -> author diaspora handle + * 'key' -> author public key (converted to pkcs#8) + * + * Author and key are used elsewhere to save a lookup for verifying replies and likes + */ + + +function diaspora_decode($importer,$xml) { + + $public = false; + $basedom = parse_xml_string($xml); + + $children = $basedom->children('https://joindiaspora.com/protocol'); + + if($children->header) { + $public = true; + $author_link = str_replace('acct:','',$children->header->author_id); + } + else { + + $encrypted_header = json_decode(base64_decode($children->encrypted_header)); + + $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key); + $ciphertext = base64_decode($encrypted_header->ciphertext); + + $outer_key_bundle = ''; + openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['channel_prvkey']); + + $j_outer_key_bundle = json_decode($outer_key_bundle); + + $outer_iv = base64_decode($j_outer_key_bundle->iv); + $outer_key = base64_decode($j_outer_key_bundle->key); + + $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv); + + + $decrypted = pkcs5_unpad($decrypted); + + /** + * $decrypted now contains something like + * + * <decrypted_header> + * <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv> + * <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key> + +***** OBSOLETE + + * <author> + * <name>Ryan Hughes</name> + * <uri>acct:galaxor@diaspora.pirateship.org</uri> + * </author> + +***** CURRENT + + * <author_id>galaxor@diaspora.priateship.org</author_id> + +***** END DIFFS + + * </decrypted_header> + */ + + logger('decrypted: ' . $decrypted, LOGGER_DATA); + $idom = parse_xml_string($decrypted,false); + + $inner_iv = base64_decode($idom->iv); + $inner_aes_key = base64_decode($idom->aes_key); + + $author_link = str_replace('acct:','',$idom->author_id); + + } + + $dom = $basedom->children(NAMESPACE_SALMON_ME); + + // figure out where in the DOM tree our data is hiding + + if($dom->provenance->data) + $base = $dom->provenance; + elseif($dom->env->data) + $base = $dom->env; + elseif($dom->data) + $base = $dom; + + if(! $base) { + logger('mod-diaspora: unable to locate salmon data in xml '); + http_status_exit(400); + } + + + // Stash the signature away for now. We have to find their key or it won't be good for anything. + $signature = base64url_decode($base->sig); + + // unpack the data + + // strip whitespace so our data element will return to one big base64 blob + $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data); + + + // stash away some other stuff for later + + $type = $base->data[0]->attributes()->type[0]; + $keyhash = $base->sig[0]->attributes()->keyhash[0]; + $encoding = $base->encoding; + $alg = $base->alg; + + $signed_data = $data . '.' . base64url_encode($type,false) . '.' . base64url_encode($encoding,false) . '.' . base64url_encode($alg,false); + + + // decode the data + $data = base64url_decode($data); + + + if($public) { + $inner_decrypted = $data; + } + else { + + // Decode the encrypted blob + + $inner_encrypted = base64_decode($data); + $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv); + $inner_decrypted = pkcs5_unpad($inner_decrypted); + } + + if(! $author_link) { + logger('mod-diaspora: Could not retrieve author URI.'); + http_status_exit(400); + } + + // Once we have the author URI, go to the web and try to find their public key + // (first this will look it up locally if it is in the fcontact cache) + // This will also convert diaspora public key from pkcs#1 to pkcs#8 + + logger('mod-diaspora: Fetching key for ' . $author_link ); + $key = get_diaspora_key($author_link); + + if(! $key) { + logger('mod-diaspora: Could not retrieve author key.'); + http_status_exit(400); + } + + $verify = rsa_verify($signed_data,$signature,$key); + + if(! $verify) { + logger('mod-diaspora: Message did not verify. Discarding.'); + http_status_exit(400); + } + + logger('mod-diaspora: Message verified.'); + + return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key); + +} + + +/* sender is now sharing with recipient */ + +function diaspora_request($importer,$xml) { + + $a = get_app(); + + $sender_handle = unxmlify($xml->sender_handle); + $recipient_handle = unxmlify($xml->recipient_handle); + + if(! $sender_handle || ! $recipient_handle) + return; + + + // Do we already have an abook record? + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$sender_handle); + + if($contact && $contact['abook_id']) { + + // perhaps we were already sharing with this person. Now they're sharing with us. + // That makes us friends. Maybe. + + // Please note some of these permissions such as PERMS_R_PAGES are impossible for Disapora. + // They cannot authenticate to our system. + + $newperms = PERMS_R_STREAM|PERMS_R_PROFILE|PERMS_R_PHOTOS|PERMS_R_ABOOK|PERMS_W_STREAM|PERMS_W_COMMENT|PERMS_W_MAIL|PERMS_W_CHAT|PERMS_R_STORAGE|PERMS_R_PAGES; + + $r = q("update abook set abook_their_perms = %d where abook_id = %d and abook_channel = %d", + intval($newperms), + intval($contact['abook_id']), + intval($importer['channel_id']) + ); + + return; + } + + $ret = find_diaspora_person_by_handle($sender_handle); + + if((! $ret) || (! strstr($ret['xchan_network'],'diaspora'))) { + logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle); + return; + } + + $role = get_pconfig($channel['channel_id'],'system','permissions_role'); + if($role) { + $x = get_role_perms($role); + if($x['perms_auto']) + $default_perms = $x['perms_accept']; + } + if(! $default_perms) + $default_perms = intval(get_pconfig($channel['channel_id'],'system','autoperms')); + + $their_perms = PERMS_R_STREAM|PERMS_R_PROFILE|PERMS_R_PHOTOS|PERMS_R_ABOOK|PERMS_W_STREAM|PERMS_W_COMMENT|PERMS_W_MAIL|PERMS_W_CHAT|PERMS_R_STORAGE|PERMS_R_PAGES; + + $r = q("insert into abook ( abook_account, abook_channel, abook_xchan, abook_my_perms, abook_their_perms, abook_closeness, abook_rating, abook_created, abook_updated, abook_connected, abook_dob, abook_flags) values ( %d, %d, '%s', %d, %d, %d, %d, '%s', '%s', '%s', '%s', %d )", + intval($importer['channel_account_id']), + intval($importer['channel_id']), + dbesc($ret['xchan_hash']), + intval($default_perms), + intval($their_perms), + intval(99), + intval(0), + dbesc(datetime_convert()), + dbesc(datetime_convert()), + dbesc(datetime_convert()), + dbesc(NULL_DATE), + intval(($default_perms) ? 0 : ABOOK_FLAG_PENDING) + ); + + + if($r) { + logger("New Diaspora introduction received for {$importer['channel_name']}"); + + $new_connection = q("select * from abook left join xchan on abook_xchan = xchan_hash left join hubloc on hubloc_hash = xchan_hash where abook_channel = %d and abook_xchan = '%s' order by abook_created desc limit 1", + intval($importer['channel_id']), + dbesc($ret['xchan_hash']) + ); + if($new_connection) { + require_once('include/enotify.php'); + notification(array( + 'type' => NOTIFY_INTRO, + 'from_xchan' => $ret['xchan_hash'], + 'to_xchan' => $importer['channel_hash'], + 'link' => z_root() . '/connedit/' . $new_connection[0]['abook_id'], + )); + + if($default_perms) { + // Send back a sharing notification to them + diaspora_share($importer,$new_connection[0]); + + } + } + } + + // find the abook record we just created + + $contact_record = diaspora_get_contact_by_handle($importer['channel_id'],$sender_handle); + + if(! $contact_record) { + logger('diaspora_request: unable to locate newly created contact record.'); + return; + } + + /** If there is a default group for this channel, add this member to it */ + + if($importer['channel_default_group']) { + require_once('include/group.php'); + $g = group_rec_byhash($importer['channel_id'],$importer['channel_default_group']); + if($g) + group_add_member($importer['channel_id'],'',$contact_record['xchan_hash'],$g['id']); + } + + return; +} + + + + +function diaspora_post($importer,$xml,$msg) { + + $a = get_app(); + $guid = notags(unxmlify($xml->guid)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + $app = notags(xmlify($xml->provider_display_name)); + + + if($diaspora_handle != $msg['author']) { + logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.'); + return 202; + } + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle); + if(! $contact) + return; + + + + if(! $app) { + if(strstr($contact['xchan_network'],'friendica')) + $app = 'Friendica'; + else + $app = 'Diaspora'; + } + + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream')) { + logger('diaspora_post: Ignoring this author.'); + return 202; + } + + $search_guid = ((strlen($guid) == 64) ? $guid . '%' : $guid); + + $r = q("SELECT id FROM item WHERE uid = %d AND mid like '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($search_guid) + ); + + if($r) { + // check dates if post editing is implemented + logger('diaspora_post: message exists: ' . $guid); + return; + } + + $created = unxmlify($xml->created_at); + $private = ((unxmlify($xml->public) == 'false') ? 1 : 0); + + $body = diaspora2bb($xml->raw_message); + + if($xml->photo) { + $body = '[img]' . $xml->photo->remote_photo_path . $xml->photo->remote_photo_name . '[/img]' . "\n\n" . $body; + $body = scale_external_images($body); + } + + +//WTF? FIXME + // Add OEmbed and other information to the body +// $body = add_page_info_to_body($body, false, true); + + $datarray = array(); + + + $tags = get_tags($body); + + + if(count($tags)) { + + $datarray['term'] = array(); + + foreach($tags as $tag) { + if(strpos($tag,'#') === 0) { + if((strpos($tag,'[url=')) || (strpos($tag,'[zrl'))) + continue; + + // don't link tags that are already embedded in links + + if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body)) + continue; + if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body)) + continue; + + $basetag = str_replace('_',' ',substr($tag,1)); + $body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body); + + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_HASHTAG, + 'otype' => TERM_OBJ_POST, + 'term' => $basetag, + 'url' => z_root() . '/search?tag=' . rawurlencode($basetag) + ); + } + } + } + + $cnt = preg_match_all('/@\[url=(.*?)\](.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER); + if($cnt) { + foreach($matches as $mtch) { + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_MENTION, + 'otype' => TERM_OBJ_POST, + 'term' => $mtch[2], + 'url' => $mtch[1] + ); + } + } + + $cnt = preg_match_all('/@\[zrl=(.*?)\](.*?)\[\/zrl\]/ism',$body,$matches,PREG_SET_ORDER); + if($cnt) { + foreach($matches as $mtch) { + // don't include plustags in the term + $term = ((substr($mtch[2],-1,1) === '+') ? substr($mtch[2],0,-1) : $mtch[2]); + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_MENTION, + 'otype' => TERM_OBJ_POST, + 'term' => $term, + 'url' => $mtch[1] + ); + } + } + + + // this won't work for Friendica or Redmatrix but it's probably the best we can do. + $plink = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1).'/posts/'.$guid; + + $datarray['uid'] = $importer['channel_id']; + + $datarray['verb'] = ACTIVITY_POST; + $datarray['mid'] = $datarray['parent_mid'] = $guid; + + $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created); + $datarray['item_private'] = $private; + + $datarray['plink'] = $plink; + + $datarray['author_xchan'] = $contact['xchan_hash']; + $datarray['owner_xchan'] = $contact['xchan_hash']; + + $datarray['body'] = $body; + + $datarray['app'] = $app; + + $datarray['item_flags'] = ITEM_UNSEEN|ITEM_THREAD_TOP; + + + $result = item_store($datarray); + return; + +} + + +function get_diaspora_reshare_xml($url,$recurse = 0) { + + $x = z_fetch_url($url); + if(! $x['success']) + $x = z_fetch_url(str_replace('https://','http://',$url)); + if(! $x['success']) { + logger('get_diaspora_reshare_xml: unable to fetch source url ' . $url); + return; + } + logger('get_diaspora_reshare_xml: source: ' . $x['body'], LOGGER_DEBUG); + + $source_xml = parse_xml_string($x['body'],false); + + if(! $source_xml) { + logger('get_diaspora_reshare_xml: unparseable result from ' . $url); + return ''; + } + + if($source_xml->post->status_message) { + return $source_xml; + } + + // see if it's a reshare of a reshare + + if($source_xml->post->reshare) + $xml = $source_xml->post->reshare; + else + return false; + + if($xml->root_diaspora_id && $xml->root_guid && $recurse < 15) { + $orig_author = notags(unxmlify($xml->root_diaspora_id)); + $orig_guid = notags(unxmlify($xml->root_guid)); + $source_url = 'https://' . substr($orig_author,strpos($orig_author,'@')+1) . '/p/' . $orig_guid . '.xml'; + $y = get_diaspora_reshare_xml($source_url,$recurse+1); + if($y) + return $y; + } + return false; +} + + + +function diaspora_reshare($importer,$xml,$msg) { + + logger('diaspora_reshare: init: ' . print_r($xml,true), LOGGER_DATA); + + $a = get_app(); + $guid = notags(unxmlify($xml->guid)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + + + if($diaspora_handle != $msg['author']) { + logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.'); + return 202; + } + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle); + if(! $contact) + return; + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream')) { + logger('diaspora_reshare: Ignoring this author: ' . $diaspora_handle . ' ' . print_r($xml,true)); + return 202; + } + + $search_guid = ((strlen($guid) == 64) ? $guid . '%' : $guid); + $r = q("SELECT id FROM item WHERE uid = %d AND mid like '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($search_guid) + ); + if($r) { + logger('diaspora_reshare: message exists: ' . $guid); + return; + } + + $orig_author = notags(unxmlify($xml->root_diaspora_id)); + $orig_guid = notags(unxmlify($xml->root_guid)); + + $source_url = 'https://' . substr($orig_author,strpos($orig_author,'@')+1) . '/p/' . $orig_guid . '.xml'; + $orig_url = 'https://'.substr($orig_author,strpos($orig_author,'@')+1).'/posts/'.$orig_guid; + + $source_xml = get_diaspora_reshare_xml($source_url); + + if($source_xml->post->status_message) { + $body = diaspora2bb($source_xml->post->status_message->raw_message); + + $orig_author = notags(unxmlify($source_xml->post->status_message->diaspora_handle)); + $orig_guid = notags(unxmlify($source_xml->post->status_message->guid)); + + + // Checking for embedded pictures + if($source_xml->post->status_message->photo->remote_photo_path && + $source_xml->post->status_message->photo->remote_photo_name) { + + $remote_photo_path = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_path)); + $remote_photo_name = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_name)); + + $body = '[img]'.$remote_photo_path.$remote_photo_name.'[/img]'."\n".$body; + + logger('diaspora_reshare: embedded picture link found: '.$body, LOGGER_DEBUG); + } + + $body = scale_external_images($body); + + // Add OEmbed and other information to the body +// $body = add_page_info_to_body($body, false, true); + } + else { + // Maybe it is a reshare of a photo that will be delivered at a later time (testing) + logger('diaspora_reshare: no reshare content found: ' . print_r($source_xml,true)); + $body = ""; + //return; + } + + //if(! $body) { + // logger('diaspora_reshare: empty body: source= ' . $x); + // return; + //} + + $person = find_diaspora_person_by_handle($orig_author); + + if($person) { + $orig_author_name = $person['xchan_name']; + $orig_author_link = $person['xchan_url']; + $orig_author_photo = $person['xchan_photo_m']; + } + + $newbody = "[share author='" . urlencode($orig_author_name) + . "' profile='" . $orig_author_link + . "' avatar='" . $orig_author_photo + . "' link='" . $orig_url + . "' posted='" . datetime_convert('UTC','UTC',unxmlify($source_xml->post->status_message->created_at)) + . "' message_id='" . unxmlify($source_xml->post->status_message->guid) + . "']" . $body . "[/share]"; + + + $created = unxmlify($xml->created_at); + $private = ((unxmlify($xml->public) == 'false') ? 1 : 0); + + $datarray = array(); + + $str_tags = ''; + + $tags = get_tags($newbody); + + + if(count($tags)) { + + $datarray['term'] = array(); + + foreach($tags as $tag) { + if(strpos($tag,'#') === 0) { + if((strpos($tag,'[url=')) || (strpos($tag,'[zrl'))) + continue; + + // don't link tags that are already embedded in links + + if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$newbody)) + continue; + if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$newbody)) + continue; + + $basetag = str_replace('_',' ',substr($tag,1)); + $newbody = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$newbody); + + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_HASHTAG, + 'otype' => TERM_OBJ_POST, + 'term' => $basetag, + 'url' => z_root() . '/search?tag=' . rawurlencode($basetag) + ); + } + } + } + + $cnt = preg_match_all('/@\[url=(.*?)\](.*?)\[\/url\]/ism',$newbody,$matches,PREG_SET_ORDER); + if($cnt) { + foreach($matches as $mtch) { + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_MENTION, + 'otype' => TERM_OBJ_POST, + 'term' => $mtch[2], + 'url' => $mtch[1] + ); + } + } + + // This won't work on redmatrix + $plink = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1).'/posts/'.$guid; + + $datarray['uid'] = $importer['channel_id']; + $datarray['mid'] = $datarray['parent_mid'] = $guid; + $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created); + $datarray['item_private'] = $private; + $datarray['plink'] = $plink; + $datarray['owner_xchan'] = $contact['xchan_hash']; + $datarray['author_xchan'] = $contact['xchan_hash']; + + $datarray['body'] = $newbody; + $datarray['app'] = 'Diaspora'; + + + $result = item_store($datarray); + + return; + +} + + +function diaspora_asphoto($importer,$xml,$msg) { + logger('diaspora_asphoto called'); + + $a = get_app(); + $guid = notags(unxmlify($xml->guid)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + + if($diaspora_handle != $msg['author']) { + logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.'); + return 202; + } + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle); + if(! $contact) + return; + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream')) { + logger('diaspora_asphoto: Ignoring this author.'); + return 202; + } + + $message_id = $diaspora_handle . ':' . $guid; + $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($message_id), + dbesc($guid) + ); + if(count($r)) { + logger('diaspora_asphoto: message exists: ' . $guid); + return; + } + + // allocate a guid on our system - we aren't fixing any collisions. + // we're ignoring them + + $g = q("select * from guid where guid = '%s' limit 1", + dbesc($guid) + ); + if(! count($g)) { + q("insert into guid ( guid ) values ( '%s' )", + dbesc($guid) + ); + } + + $created = unxmlify($xml->created_at); + $private = ((unxmlify($xml->public) == 'false') ? 1 : 0); + + if(strlen($xml->objectId) && ($xml->objectId != 0) && ($xml->image_url)) { + $body = '[url=' . notags(unxmlify($xml->image_url)) . '][img]' . notags(unxmlify($xml->objectId)) . '[/img][/url]' . "\n"; + $body = scale_external_images($body,false); + } + elseif($xml->image_url) { + $body = '[img]' . notags(unxmlify($xml->image_url)) . '[/img]' . "\n"; + $body = scale_external_images($body); + } + else { + logger('diaspora_asphoto: no photo url found.'); + return; + } + + $plink = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1).'/posts/'.$guid; + + $datarray = array(); + + $datarray['uid'] = $importer['channel_id']; + $datarray['contact-id'] = $contact['id']; + $datarray['wall'] = 0; + $datarray['network'] = NETWORK_DIASPORA; + $datarray['guid'] = $guid; + $datarray['uri'] = $datarray['parent-uri'] = $message_id; + $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created); + $datarray['private'] = $private; + $datarray['parent'] = 0; + $datarray['plink'] = $plink; + $datarray['owner-name'] = $contact['name']; + $datarray['owner-link'] = $contact['url']; + //$datarray['owner-avatar'] = $contact['thumb']; + $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']); + $datarray['author-name'] = $contact['name']; + $datarray['author-link'] = $contact['url']; + $datarray['author-avatar'] = $contact['thumb']; + $datarray['body'] = $body; + + $datarray['app'] = 'Diaspora/Cubbi.es'; + + $message_id = item_store($datarray); + + //if($message_id) { + // q("update item set plink = '%s' where id = %d", + // dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id), + // intval($message_id) + // ); + //} + + return; + +} + + + + + + +function diaspora_comment($importer,$xml,$msg) { + + $a = get_app(); + $guid = notags(unxmlify($xml->guid)); + $parent_guid = notags(unxmlify($xml->parent_guid)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + $target_type = notags(unxmlify($xml->target_type)); + $text = unxmlify($xml->text); + $author_signature = notags(unxmlify($xml->author_signature)); + + $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : ''); + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']); + if(! $contact) { + logger('diaspora_comment: cannot find contact: ' . $msg['author']); + return; + } + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_comments')) { + logger('diaspora_comment: Ignoring this author.'); + return 202; + } + + // Friendica is currently truncating guids at 64 chars + + $search_guid = $guid; + if(strlen($guid) == 64) + $search_guid = $guid . '%'; + + $r = q("SELECT * FROM item WHERE uid = %d AND mid like '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($search_guid) + ); + if($r) { + logger('diaspora_comment: our comment just got relayed back to us (or there was a guid collision) : ' . $guid); + return; + } + + $search_guid = $parent_guid; + if(strlen($parent_guid) == 64) + $search_guid = $parent_guid . '%'; + + + $r = q("SELECT * FROM item WHERE uid = %d AND mid LIKE '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($search_guid) + ); + if(! $r) { + logger('diaspora_comment: parent item not found: parent: ' . $parent_guid . ' item: ' . $guid); + return; + } + $parent_item = $r[0]; + + + /* How Diaspora performs comment signature checking: + + - If an item has been sent by the comment author to the top-level post owner to relay on + to the rest of the contacts on the top-level post, the top-level post owner should check + the author_signature, then create a parent_author_signature before relaying the comment on + - If an item has been relayed on by the top-level post owner, the contacts who receive it + check only the parent_author_signature. Basically, they trust that the top-level post + owner has already verified the authenticity of anything he/she sends out + - In either case, the signature that get checked is the signature created by the person + who sent the psuedo-salmon + */ + + $signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle; + $key = $msg['key']; + + if($parent_author_signature) { + // If a parent_author_signature exists, then we've received the comment + // relayed from the top-level post owner. There's no need to check the + // author_signature if the parent_author_signature is valid + + $parent_author_signature = base64_decode($parent_author_signature); + + if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) { + logger('diaspora_comment: top-level owner verification failed.'); + return; + } + } + else { + // If there's no parent_author_signature, then we've received the comment + // from the comment creator. In that case, the person is commenting on + // our post, so he/she must be a contact of ours and his/her public key + // should be in $msg['key'] + + $author_signature = base64_decode($author_signature); + + if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) { + logger('diaspora_comment: comment author verification failed.'); + return; + } + } + + // Phew! Everything checks out. Now create an item. + + // Find the original comment author information. + // We need this to make sure we display the comment author + // information (name and avatar) correctly. + + if(strcasecmp($diaspora_handle,$msg['author']) == 0) + $person = $contact; + else { + $person = find_diaspora_person_by_handle($diaspora_handle); + + if(! is_array($person)) { + logger('diaspora_comment: unable to find author details'); + return; + } + } + + + $body = diaspora2bb($text); + + $datarray = array(); + + $tags = get_tags($body); + + if(count($tags)) { + + $datarray['term'] = array(); + + foreach($tags as $tag) { + if(strpos($tag,'#') === 0) { + if((strpos($tag,'[url=')) || (strpos($tag,'[zrl'))) + continue; + + // don't link tags that are already embedded in links + + if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body)) + continue; + if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body)) + continue; + + $basetag = str_replace('_',' ',substr($tag,1)); + $body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body); + + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_HASHTAG, + 'otype' => TERM_OBJ_POST, + 'term' => $basetag, + 'url' => z_root() . '/search?tag=' . rawurlencode($basetag) + ); + } + } + } + + $cnt = preg_match_all('/@\[url=(.*?)\](.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER); + if($cnt) { + foreach($matches as $mtch) { + $datarray['term'][] = array( + 'uid' => $importer['channel_id'], + 'type' => TERM_MENTION, + 'otype' => TERM_OBJ_POST, + 'term' => $mtch[2], + 'url' => $mtch[1] + ); + } + } + + $datarray['uid'] = $importer['channel_id']; + $datarray['verb'] = ACTIVITY_POST; + $datarray['mid'] = $guid; + $datarray['parent_mid'] = $parent_item['mid']; + + // set the route to that of the parent so downstream hubs won't reject it. + $datarray['route'] = $parent_item['route']; + + // No timestamps for comments? OK, we'll the use current time. + $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert(); + $datarray['item_private'] = $parent_item['item_private']; + + $datarray['owner_xchan'] = $parent_item['owner_xchan']; + $datarray['author_xchan'] = $person['xchan_hash']; + + $datarray['body'] = $body; + + if(strstr($person['xchan_network'],'friendica')) + $app = 'Friendica'; + else + $app = 'Diaspora'; + + $datarray['app'] = $app; + + if(! $parent_author_signature) { + $key = get_config('system','pubkey'); + $x = array('signer' => $diaspora_handle, 'body' => $text, + 'signed_text' => $signed_data, 'signature' => base64_encode($author_signature)); + $datarray['diaspora_meta'] = json_encode(crypto_encapsulate(json_encode($x),$key)); + } + + $result = item_store($datarray); + + if($result && $result['success']) + $message_id = $result['item_id']; + + if(($parent_item['item_flags'] & ITEM_ORIGIN) && (! $parent_author_signature)) { + // if the message isn't already being relayed, notify others + // the existence of parent_author_signature means the parent_author or owner + // is already relaying. + + proc_run('php','include/notifier.php','comment-import',$message_id); + } + + if($result['item_id']) { + $r = q("select * from item where id = %d limit 1", + intval($result['item_id']) + ); + if($r) + send_status_notifications($result['item_id'],$r[0]); + } + + return; +} + + + + +function diaspora_conversation($importer,$xml,$msg) { + + $a = get_app(); + + $guid = notags(unxmlify($xml->guid)); + $subject = notags(unxmlify($xml->subject)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + $participant_handles = notags(unxmlify($xml->participant_handles)); + $created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at))); + + $parent_uri = $diaspora_handle . ':' . $guid; + + $messages = $xml->message; + + if(! count($messages)) { + logger('diaspora_conversation: empty conversation'); + return; + } + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']); + if(! $contact) { + logger('diaspora_conversation: cannot find contact: ' . $msg['author']); + return; + } + + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_mail')) { + logger('diaspora_conversation: Ignoring this author.'); + return 202; + } + + $conversation = null; + + $c = q("select * from conv where uid = %d and guid = '%s' limit 1", + intval($importer['channel_id']), + dbesc($guid) + ); + if(count($c)) + $conversation = $c[0]; + else { + $r = q("insert into conv (uid,guid,creator,created,updated,subject,recips) values(%d, '%s', '%s', '%s', '%s', '%s', '%s') ", + intval($importer['channel_id']), + dbesc($guid), + dbesc($diaspora_handle), + dbesc(datetime_convert('UTC','UTC',$created_at)), + dbesc(datetime_convert()), + dbesc($subject), + dbesc($participant_handles) + ); + if($r) + $c = q("select * from conv where uid = %d and guid = '%s' limit 1", + intval($importer['channel_id']), + dbesc($guid) + ); + if(count($c)) + $conversation = $c[0]; + } + if(! $conversation) { + logger('diaspora_conversation: unable to create conversation.'); + return; + } + + foreach($messages as $mesg) { + + $reply = 0; + + $msg_guid = notags(unxmlify($mesg->guid)); + $msg_parent_guid = notags(unxmlify($mesg->parent_guid)); + $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature)); + $msg_author_signature = notags(unxmlify($mesg->author_signature)); + $msg_text = unxmlify($mesg->text); + $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($mesg->created_at))); + $msg_diaspora_handle = notags(unxmlify($mesg->diaspora_handle)); + $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid)); + if($msg_conversation_guid != $guid) { + logger('diaspora_conversation: message conversation guid does not belong to the current conversation. ' . $xml); + continue; + } + + $body = diaspora2bb($msg_text); + + $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid; + + $author_signature = base64_decode($msg_author_signature); + + if(strcasecmp($msg_diaspora_handle,$msg['author']) == 0) { + $person = $contact; + $key = $msg['key']; + } + else { + $person = find_diaspora_person_by_handle($msg_diaspora_handle); + + if(is_array($person) && x($person,'xchan_pubkey')) + $key = $person['xchan_pubkey']; + else { + logger('diaspora_conversation: unable to find author details'); + continue; + } + } + + if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) { + logger('diaspora_conversation: verification failed.'); + continue; + } + + if($msg_parent_author_signature) { + $owner_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid; + + $parent_author_signature = base64_decode($msg_parent_author_signature); + + $key = $msg['key']; + + if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) { + logger('diaspora_conversation: owner verification failed.'); + continue; + } + } + + $r = q("select id from mail where mid = '%s' limit 1", + dbesc($message_id) + ); + if(count($r)) { + logger('diaspora_conversation: duplicate message already delivered.', LOGGER_DEBUG); + continue; + } + + $key = get_config('system','pubkey'); + if($subject) + $subject = json_encode(crypto_encapsulate($subject,$key)); + if($body) + $body = json_encode(crypto_encapsulate($body,$key)); + + q("insert into mail ( `channel_id`, `convid`, `from_xchan`,`to_xchan`,`title`,`body`,`mail_flags`,`mid`,`parent_mid`,`created`) values ( %d, %d, '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s')", + intval($importer['channel_id']), + intval($conversation['id']), + dbesc($person['xchan_hash']), + dbesc($importer['channel_hash']), + dbesc($subject), + dbesc($body), + intval(MAIL_OBSCURED), + dbesc($msg_guid), + dbesc($parent_uri), + dbesc($msg_created_at) + ); + + q("update conv set updated = '%s' where id = %d", + dbesc(datetime_convert()), + intval($conversation['id']) + ); + + require_once('include/enotify.php'); +/****** +//FIXME + + notification(array( + 'type' => NOTIFY_MAIL, + 'notify_flags' => $importer['notify-flags'], + 'language' => $importer['language'], + 'to_name' => $importer['username'], + 'to_email' => $importer['email'], + 'uid' =>$importer['importer_uid'], + 'item' => array('subject' => $subject, 'body' => $body), + 'source_name' => $person['name'], + 'source_link' => $person['url'], + 'source_photo' => $person['thumb'], + 'verb' => ACTIVITY_POST, + 'otype' => 'mail' + )); +*******/ + + } + + return; +} + +function diaspora_message($importer,$xml,$msg) { + + $a = get_app(); + + $msg_guid = notags(unxmlify($xml->guid)); + $msg_parent_guid = notags(unxmlify($xml->parent_guid)); + $msg_parent_author_signature = notags(unxmlify($xml->parent_author_signature)); + $msg_author_signature = notags(unxmlify($xml->author_signature)); + $msg_text = unxmlify($xml->text); + $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at))); + $msg_diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + $msg_conversation_guid = notags(unxmlify($xml->conversation_guid)); + + $parent_uri = $msg_parent_guid; + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg_diaspora_handle); + if(! $contact) { + logger('diaspora_message: cannot find contact: ' . $msg_diaspora_handle); + return; + } + + if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) { + logger('diaspora_message: Ignoring this author.'); + return 202; + } + + $conversation = null; + + $c = q("select * from conv where uid = %d and guid = '%s' limit 1", + intval($importer['channel_id']), + dbesc($msg_conversation_guid) + ); + if($c) + $conversation = $c[0]; + else { + logger('diaspora_message: conversation not available.'); + return; + } + + $reply = 0; + + $subject = $conversation['subject']; + $body = diaspora2bb($msg_text); + $message_id = $msg_diaspora_handle . ':' . $msg_guid; + + $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($xml->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid; + + + $author_signature = base64_decode($msg_author_signature); + + $person = find_diaspora_person_by_handle($msg_diaspora_handle); + if(is_array($person) && x($person,'xchan_pubkey')) + $key = $person['xchan_pubkey']; + else { + logger('diaspora_message: unable to find author details'); + return; + } + + if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) { + logger('diaspora_message: verification failed.'); + return; + } + + $r = q("select id from mail where mid = '%s' and channel_id = %d limit 1", + dbesc($message_id), + intval($importer['channel_id']) + ); + if($r) { + logger('diaspora_message: duplicate message already delivered.', LOGGER_DEBUG); + return; + } + + $key = get_config('system','pubkey'); + if($subject) + $subject = json_encode(crypto_encapsulate($subject,$key)); + if($body) + $body = json_encode(crypto_encapsulate($body,$key)); + + q("insert into mail ( `channel_id`, `convid`, `from_xchan`,`to_xchan`,`title`,`body`,`mail_flags`,`mid`,`parent_mid`,`created`) values ( %d, %d, '%s', '%s', '%s', '%s', '%d','%s','%s','%s')", + intval($importer['channel_id']), + intval($conversation['id']), + dbesc($person['xchan_hash']), + dbesc($importer['xchan_hash']), + dbesc($subject), + dbesc($body), + intval(MAIL_OBSCURED), + dbesc($msg_guid), + dbesc($parent_uri), + dbesc($msg_created_at) + ); + + q("update conv set updated = '%s' where id = %d", + dbesc(datetime_convert()), + intval($conversation['id']) + ); + + return; +} + + +function diaspora_photo($importer,$xml,$msg,$attempt=1) { + + $a = get_app(); + + logger('diaspora_photo: init',LOGGER_DEBUG); + + $remote_photo_path = notags(unxmlify($xml->remote_photo_path)); + + $remote_photo_name = notags(unxmlify($xml->remote_photo_name)); + + $status_message_guid = notags(unxmlify($xml->status_message_guid)); + + $guid = notags(unxmlify($xml->guid)); + + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + + $public = notags(unxmlify($xml->public)); + + $created_at = notags(unxmlify($xml_created_at)); + + logger('diaspora_photo: status_message_guid: ' . $status_message_guid, LOGGER_DEBUG); + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']); + if(! $contact) { + logger('diaspora_photo: contact record not found: ' . $msg['author'] . ' handle: ' . $diaspora_handle); + return; + } + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream')) { + logger('diaspora_photo: Ignoring this author.'); + return 202; + } + + $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `mid` = '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($status_message_guid) + ); + if(! $r) { + logger('diaspora_photo: attempt = ' . $attempt . '; status message not found: ' . $status_message_guid . ' for photo: ' . $guid); + return; + } + +// $parent_item = $r[0]; + +// $link_text = '[img]' . $remote_photo_path . $remote_photo_name . '[/img]' . "\n"; + +// $link_text = scale_external_images($link_text, true, +// array($remote_photo_name, 'scaled_full_' . $remote_photo_name)); + +// if(strpos($parent_item['body'],$link_text) === false) { +// $r = q("update item set `body` = '%s', `visible` = 1 where `id` = %d and `uid` = %d", +// dbesc($link_text . $parent_item['body']), +// intval($parent_item['id']), +// intval($parent_item['uid']) +// ); +// } + + return; +} + + + + +function diaspora_like($importer,$xml,$msg) { + + $a = get_app(); + $guid = notags(unxmlify($xml->guid)); + $parent_guid = notags(unxmlify($xml->parent_guid)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + $target_type = notags(unxmlify($xml->target_type)); + $positive = notags(unxmlify($xml->positive)); + $author_signature = notags(unxmlify($xml->author_signature)); + + $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : ''); + + // likes on comments not supported here and likes on photos not supported by Diaspora + +// if($target_type !== 'Post') +// return; + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']); + if(! $contact) { + logger('diaspora_like: cannot find contact: ' . $msg['author'] . ' for channel ' . $importer['channel_name']); + return; + } + + + if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_comments')) { + logger('diaspora_like: Ignoring this author.'); + return 202; + } + + $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `mid` = '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($parent_guid) + ); + if(! count($r)) { + logger('diaspora_like: parent item not found: ' . $guid); + return; + } + + $parent_item = $r[0]; + + $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `mid` = '%s' LIMIT 1", + intval($importer['channel_id']), + dbesc($guid) + ); + if(count($r)) { + if($positive === 'true') { + logger('diaspora_like: duplicate like: ' . $guid); + return; + } + // Note: I don't think "Like" objects with positive = "false" are ever actually used + // It looks like "RelayableRetractions" are used for "unlike" instead + if($positive === 'false') { + logger('diaspora_like: received a like with positive set to "false"...ignoring'); + // perhaps call drop_item() + // FIXME--actually don't unless it turns out that Diaspora does indeed send out "false" likes + // send notification via proc_run() + return; + } + } + + $i = q("select * from xchan where xchan_hash = '%s' limit 1", + dbesc($parent_item['author_xchan']) + ); + if($i) + $item_author = $i[0]; + + // Note: I don't think "Like" objects with positive = "false" are ever actually used + // It looks like "RelayableRetractions" are used for "unlike" instead + if($positive === 'false') { + logger('diaspora_like: received a like with positive set to "false"'); + logger('diaspora_like: unlike received with no corresponding like...ignoring'); + return; + } + + + /* How Diaspora performs "like" signature checking: + + - If an item has been sent by the like author to the top-level post owner to relay on + to the rest of the contacts on the top-level post, the top-level post owner should check + the author_signature, then create a parent_author_signature before relaying the like on + - If an item has been relayed on by the top-level post owner, the contacts who receive it + check only the parent_author_signature. Basically, they trust that the top-level post + owner has already verified the authenticity of anything he/she sends out + - In either case, the signature that get checked is the signature created by the person + who sent the salmon + */ + + // 2014-09-10 let's try this: signatures are failing. I'll try and make a signable string from + // the parameters in the order they were presented in the post. This is how D* creates the signable string. + + + $signed_data = $positive . ';' . $guid . ';' . $target_type . ';' . $parent_guid . ';' . $diaspora_handle; + + $key = $msg['key']; + + if($parent_author_signature) { + // If a parent_author_signature exists, then we've received the like + // relayed from the top-level post owner. There's no need to check the + // author_signature if the parent_author_signature is valid + + $parent_author_signature = base64_decode($parent_author_signature); + + if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) { + if (intval(get_config('system','ignore_diaspora_like_signature'))) + logger('diaspora_like: top-level owner verification failed. Proceeding anyway.'); + else { + logger('diaspora_like: top-level owner verification failed.'); + return; + } + } + } + else { + // If there's no parent_author_signature, then we've received the like + // from the like creator. In that case, the person is "like"ing + // our post, so he/she must be a contact of ours and his/her public key + // should be in $msg['key'] + + $author_signature = base64_decode($author_signature); + + if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) { + if (intval(get_config('system','ignore_diaspora_like_signature'))) + logger('diaspora_like: like creator verification failed. Proceeding anyway'); + else { + logger('diaspora_like: like creator verification failed.'); + return; + } + } + } + + logger('diaspora_like: signature check complete.',LOGGER_DEBUG); + + // Phew! Everything checks out. Now create an item. + + // Find the original comment author information. + // We need this to make sure we display the comment author + // information (name and avatar) correctly. + if(strcasecmp($diaspora_handle,$msg['author']) == 0) + $person = $contact; + else { + $person = find_diaspora_person_by_handle($diaspora_handle); + + if(! is_array($person)) { + logger('diaspora_like: unable to find author details'); + return; + } + } + + $uri = $diaspora_handle . ':' . $guid; + + $activity = ACTIVITY_LIKE; + + $post_type = (($parent_item['resource_type'] === 'photo') ? t('photo') : t('status')); + + $links = array(array('rel' => 'alternate','type' => 'text/html', 'href' => $parent_item['plink'])); + $objtype = (($parent_item['resource_type'] === 'photo') ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE ); + + $body = $parent_item['body']; + + + $object = json_encode(array( + 'type' => $post_type, + 'id' => $parent_item['mid'], + 'parent' => (($parent_item['thr_parent']) ? $parent_item['thr_parent'] : $parent_item['parent_mid']), + 'link' => $links, + 'title' => $parent_item['title'], + 'content' => $parent_item['body'], + 'created' => $parent_item['created'], + 'edited' => $parent_item['edited'], + 'author' => array( + 'name' => $item_author['xchan_name'], + 'address' => $item_author['xchan_addr'], + 'guid' => $item_author['xchan_guid'], + 'guid_sig' => $item_author['xchan_guid_sig'], + 'link' => array( + array('rel' => 'alternate', 'type' => 'text/html', 'href' => $item_author['xchan_url']), + array('rel' => 'photo', 'type' => $item_author['xchan_photo_mimetype'], 'href' => $item_author['xchan_photo_m'])), + ), + )); + + + $bodyverb = t('%1$s likes %2$s\'s %3$s'); + + $arr = array(); + + $arr['uid'] = $importer['channel_id']; + $arr['aid'] = $importer['channel_account_id']; + $arr['mid'] = $guid; + $arr['parent_mid'] = $parent_item['mid']; + $arr['owner_xchan'] = $parent_item['owner_xchan']; + $arr['author_xchan'] = $person['xchan_hash']; + + $ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]'; + $alink = '[url=' . $parent_item['author-link'] . ']' . $parent_item['author-name'] . '[/url]'; + $plink = '[url='. z_root() .'/display/'.$guid.']'.$post_type.'[/url]'; + $arr['body'] = sprintf( $bodyverb, $ulink, $alink, $plink ); + + $arr['app'] = 'Diaspora'; + + // set the route to that of the parent so downstream hubs won't reject it. + $arr['route'] = $parent_item['route']; + + $arr['item_private'] = $parent_item['item_private']; + $arr['verb'] = $activity; + $arr['obj_type'] = $objtype; + $arr['object'] = $object; + + if(! $parent_author_signature) { + $key = get_config('system','pubkey'); + $x = array('signer' => $diaspora_handle, 'body' => $text, + 'signed_text' => $signed_data, 'signature' => base64_encode($author_signature)); + $arr['diaspora_meta'] = json_encode(crypto_encapsulate(json_encode($x),$key)); + } + + $x = item_store($arr); + + if($x) + $message_id = $x['item_id']; + + // if the message isn't already being relayed, notify others + // the existence of parent_author_signature means the parent_author or owner + // is already relaying. The parent_item['origin'] indicates the message was created on our system + + if(($parent_item['item_flags'] & ITEM_ORIGIN) && (! $parent_author_signature)) + proc_run('php','include/notifier.php','comment-import',$message_id); + + return; +} + +function diaspora_retraction($importer,$xml) { + + + $guid = notags(unxmlify($xml->guid)); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + $type = notags(unxmlify($xml->type)); + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle); + if(! $contact) + return; + + if($type === 'Person') { + require_once('include/Contact.php'); + contact_remove($importer['channel_id'],$contact['abook_id']); + } + elseif($type === 'Post') { + $r = q("select * from item where mid = '%s' and uid = %d limit 1", + dbesc('guid'), + intval($importer['channel_id']) + ); + if(count($r)) { + if(link_compare($r[0]['author_xchan'],$contact['xchan_hash'])) { + drop_item($r[0]['id'],false); + } + } + } + + return 202; + // NOTREACHED +} + +function diaspora_signed_retraction($importer,$xml,$msg) { + + + $guid = notags(unxmlify($xml->target_guid)); + $diaspora_handle = notags(unxmlify($xml->sender_handle)); + $type = notags(unxmlify($xml->target_type)); + $sig = notags(unxmlify($xml->target_author_signature)); + + $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : ''); + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle); + if(! $contact) { + logger('diaspora_signed_retraction: no contact ' . $diaspora_handle . ' for ' . $importer['channel_id']); + return; + } + + + $signed_data = $guid . ';' . $type ; + $key = $msg['key']; + + /* How Diaspora performs relayable_retraction signature checking: + + - If an item has been sent by the item author to the top-level post owner to relay on + to the rest of the contacts on the top-level post, the top-level post owner checks + the author_signature, then creates a parent_author_signature before relaying the item on + - If an item has been relayed on by the top-level post owner, the contacts who receive it + check only the parent_author_signature. Basically, they trust that the top-level post + owner has already verified the authenticity of anything he/she sends out + - In either case, the signature that get checked is the signature created by the person + who sent the salmon + */ + + if($parent_author_signature) { + + $parent_author_signature = base64_decode($parent_author_signature); + + if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) { + logger('diaspora_signed_retraction: top-level post owner verification failed'); + return; + } + + } + else { + + $sig_decode = base64_decode($sig); + + if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) { + logger('diaspora_signed_retraction: retraction owner verification failed.' . print_r($msg,true)); + return; + } + } + + if($type === 'StatusMessage' || $type === 'Comment' || $type === 'Like') { + $r = q("select * from item where mid = '%s' and uid = %d limit 1", + dbesc($guid), + intval($importer['channel_id']) + ); + if($r) { + if($r[0]['author_xchan'] == $contact['xchan_hash']) { + + drop_item($r[0]['id'],false, DROPITEM_PHASE1); + + // Now check if the retraction needs to be relayed by us + // + // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always + // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent. + // The only item with `parent` and `id` as the parent id is the parent item. + $p = q("select item_flags from item where parent = %d and id = %d limit 1", + $r[0]['parent'], + $r[0]['parent'] + ); + if($p) { + if(($p[0]['item_flags'] & ITEM_ORIGIN) && (! $parent_author_signature)) { +// FIXME so we can relay this +// q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ", +// $r[0]['id'], +// dbesc($signed_data), +// dbesc($sig), +// dbesc($diaspora_handle) +// ); + + // the existence of parent_author_signature would have meant the parent_author or owner + // is already relaying. + logger('diaspora_signed_retraction: relaying relayable_retraction'); + + proc_run('php','include/notifier.php','drop',$r[0]['id']); + } + } + } + } + } + else + logger('diaspora_signed_retraction: unknown type: ' . $type); + + return 202; + // NOTREACHED +} + +function diaspora_profile($importer,$xml,$msg) { + + $a = get_app(); + $diaspora_handle = notags(unxmlify($xml->diaspora_handle)); + + + if($diaspora_handle != $msg['author']) { + logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.'); + return 202; + } + + $contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle); + if(! $contact) + return; + + if($contact['blocked']) { + logger('diaspora_post: Ignoring this author.'); + return 202; + } + + $name = unxmlify($xml->first_name) . ((strlen($xml->last_name)) ? ' ' . unxmlify($xml->last_name) : ''); + $image_url = unxmlify($xml->image_url); + $birthday = unxmlify($xml->birthday); + + + $handle_parts = explode("@", $diaspora_handle); + if($name === '') { + $name = $handle_parts[0]; + } + + + if( preg_match("|^https?://|", $image_url) === 0) { + $image_url = "http://" . $handle_parts[1] . $image_url; + } + + require_once('include/photo/photo_driver.php'); + + $images = import_profile_photo($image_url,$contact['xchan_hash']); + + // Generic birthday. We don't know the timezone. The year is irrelevant. + + $birthday = str_replace('1000','1901',$birthday); + + $birthday = datetime_convert('UTC','UTC',$birthday,'Y-m-d'); + + // this is to prevent multiple birthday notifications in a single year + // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year + + if(substr($birthday,5) === substr($contact['bd'],5)) + $birthday = $contact['bd']; + + // TODO: update name on item['author-name'] if the name changed. See consume_feed() + // Not doing this currently because D* protocol is scheduled for revision soon. + +/* $r = q("UPDATE `contact` SET `name` = '%s', `name-date` = '%s', `photo` = '%s', `thumb` = '%s', `micro` = '%s', `avatar-date` = '%s' , `bd` = '%s' WHERE `id` = %d AND `uid` = %d", + dbesc($name), + dbesc(datetime_convert()), + dbesc($images[0]), + dbesc($images[1]), + dbesc($images[2]), + dbesc(datetime_convert()), + dbesc($birthday), + intval($contact['id']), + intval($importer['channel_id']) + ); +*/ +/* if($r) { + if($oldphotos) { + foreach($oldphotos as $ph) { + q("DELETE FROM `photo` WHERE `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' AND `resource-id` = '%s' ", + intval($importer['channel_id']), + intval($contact['id']), + dbesc($ph['resource-id']) + ); + } + } + } */ + + return; + +} + +function diaspora_share($owner,$contact) { + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3); + + if(! array_key_exists('xchan_hash',$contact)) { + $c = q("select * from xchan left join hubloc on xchan_hash = hubloc_hash where xchan_hash = '%s' limit 1", + dbesc($contact['hubloc_hash']) + ); + if(! $c) { + logger('diaspora_share: ' . $contact['hubloc_hash'] . ' not found.'); + return; + } + $contact = $c[0]; + } + + $theiraddr = $contact['xchan_addr']; + + $tpl = get_markup_template('diaspora_share.tpl'); + $msg = replace_macros($tpl, array( + '$sender' => $myaddr, + '$recipient' => $theiraddr + )); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey']))); + return(diaspora_transmit($owner,$contact,$slap, false)); +} + +function diaspora_unshare($owner,$contact) { + + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3); + + $tpl = get_markup_template('diaspora_retract.tpl'); + $msg = replace_macros($tpl, array( + '$guid' => $owner['channel_guid'], + '$type' => 'Person', + '$handle' => $myaddr + )); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey']))); + + return(diaspora_transmit($owner,$contact,$slap, false)); +} + + +function diaspora_send_status($item,$owner,$contact,$public_batch = false) { + + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3); + + $images = array(); + + $title = $item['title']; + $body = bb2diaspora_itembody($item,true); + +/* + // We're trying to match Diaspora's split message/photo protocol but + // all the photos are displayed on D* as links and not img's - even + // though we're sending pretty much precisely what they send us when + // doing the same operation. + // Commented out for now, we'll use bb2diaspora to convert photos to markdown + // which seems to get through intact. + + $cnt = preg_match_all('|\[img\](.*?)\[\/img\]|',$body,$matches,PREG_SET_ORDER); + if($cnt) { + foreach($matches as $mtch) { + $detail = array(); + $detail['str'] = $mtch[0]; + $detail['path'] = dirname($mtch[1]) . '/'; + $detail['file'] = basename($mtch[1]); + $detail['guid'] = $item['guid']; + $detail['handle'] = $myaddr; + $images[] = $detail; + $body = str_replace($detail['str'],$mtch[1],$body); + } + } +*/ + + + $public = (($item['item_private']) ? 'false' : 'true'); + + require_once('include/datetime.php'); + $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C'); + + // Detect a share element and do a reshare + // see: https://github.com/Raven24/diaspora-federation/blob/master/lib/diaspora-federation/entities/reshare.rb + if (!$item['item_private'] AND ($ret = diaspora_is_reshare($item["body"]))) { + $tpl = get_markup_template('diaspora_reshare.tpl'); + $msg = replace_macros($tpl, array( + '$root_handle' => xmlify($ret['root_handle']), + '$root_guid' => $ret['root_guid'], + '$guid' => $item['mid'], + '$handle' => xmlify($myaddr), + '$public' => $public, + '$created' => $created, + '$provider' => (($item['app']) ? $item['app'] : 'redmatrix') + )); + } else { + $tpl = get_markup_template('diaspora_post.tpl'); + $msg = replace_macros($tpl, array( + '$body' => xmlify($body), + '$guid' => $item['mid'], + '$handle' => xmlify($myaddr), + '$public' => $public, + '$created' => $created, + '$provider' => (($item['app']) ? $item['app'] : 'redmatrix') + )); + } + + logger('diaspora_send_status: '.$owner['channel_name'].' -> '.$contact['xchan_name'].' base message: ' . $msg, LOGGER_DATA); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey'],$public_batch))); + + $return_code = diaspora_transmit($owner,$contact,$slap,$public_batch); + +// logger('diaspora_send_status: guid: '.$item['mid'].' result '.$return_code, LOGGER_DEBUG); + + if(count($images)) { + diaspora_send_images($item,$owner,$contact,$images,$public_batch); + } + + return $return_code; +} + +function diaspora_is_reshare($body) { + + $body = trim($body); + + // Skip if it isn't a pure repeated messages + // Does it start with a share? + if(strpos($body, "[share") > 0) + return(false); + + // Does it end with a share? + if(strlen($body) > (strrpos($body, "[/share]") + 8)) + return(false); + + $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body); + // Skip if there is no shared message in there + if ($body == $attributes) + return(false); + + $profile = ""; + preg_match("/profile='(.*?)'/ism", $attributes, $matches); + if ($matches[1] != "") + $profile = $matches[1]; + + preg_match('/profile="(.*?)"/ism', $attributes, $matches); + if ($matches[1] != "") + $profile = $matches[1]; + + $ret= array(); + + $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile); + if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == "")) + return(false); + + $link = ""; + preg_match("/link='(.*?)'/ism", $attributes, $matches); + if ($matches[1] != "") + $link = $matches[1]; + + preg_match('/link="(.*?)"/ism', $attributes, $matches); + if ($matches[1] != "") + $link = $matches[1]; + + $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link); + if (($ret["root_guid"] == $link) OR ($ret["root_guid"] == "")) + return(false); + + return($ret); +} + +function diaspora_send_images($item,$owner,$contact,$images,$public_batch = false) { + $a = get_app(); + if(! count($images)) + return; + $mysite = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://') + 3) . '/photo'; + + $tpl = get_markup_template('diaspora_photo.tpl'); + foreach($images as $image) { + if(! stristr($image['path'],$mysite)) + continue; + $resource = str_replace('.jpg','',$image['file']); + $resource = substr($resource,0,strpos($resource,'-')); + + $r = q("select * from photo where `resource_id` = '%s' and `uid` = %d limit 1", + dbesc($resource), + intval($owner['uid']) + ); + if(! $r) + continue; + $public = (($r[0]['allow_cid'] || $r[0]['allow_gid'] || $r[0]['deny_cid'] || $r[0]['deny_gid']) ? 'false' : 'true' ); + $msg = replace_macros($tpl,array( + '$path' => xmlify($image['path']), + '$filename' => xmlify($image['file']), + '$msg_guid' => xmlify($image['guid']), + '$guid' => xmlify($r[0]['resource_id']), + '$handle' => xmlify($image['handle']), + '$public' => xmlify($public), + '$created_at' => xmlify(datetime_convert('UTC','UTC',$r[0]['created'],'Y-m-d H:i:s \U\T\C')) + )); + + + logger('diaspora_send_photo: base message: ' . $msg, LOGGER_DATA); + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey'],$public_batch))); + + diaspora_transmit($owner,$contact,$slap,$public_batch); + } + +} + +function diaspora_send_followup($item,$owner,$contact,$public_batch = false) { + + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . get_app()->get_hostname(); + $theiraddr = $contact['xchan_addr']; + + // Diaspora doesn't support threaded comments, but some + // versions of Diaspora (i.e. Diaspora-pistos) support + // likes on comments + if(($item['verb'] === ACTIVITY_LIKE || $item['verb'] === ACTIVITY_DISLIKE) && $item['thr_parent']) { + $p = q("select mid, parent_mid from item where mid = '%s' limit 1", + dbesc($item['thr_parent']) + ); + } + else { + // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always + // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent. + // The only item with `parent` and `id` as the parent id is the parent item. + $p = q("select * from item where parent = %d and id = %d limit 1", + intval($item['parent']), + intval($item['parent']) + ); + } + if($p) + $parent = $p[0]; + else + return; + + + if(($item['verb'] === ACTIVITY_LIKE) && ($parent['mid'] === $parent['parent_mid'])) { + $tpl = get_markup_template('diaspora_like.tpl'); + $like = true; + $target_type = 'Post'; + $positive = 'true'; + + if(($item_['item_restrict'] & ITEM_DELETED)) + logger('diaspora_send_followup: received deleted "like". Those should go to diaspora_send_retraction'); + } + else { + $tpl = get_markup_template('diaspora_comment.tpl'); + $like = false; + } + + if($item['diaspora_meta'] && ! $like) { + $diaspora_meta = json_decode($item['diaspora_meta'],true); + if($diaspora_meta) { + if(array_key_exists('iv',$diaspora_meta)) { + $key = get_config('system','prvkey'); + $meta = json_decode(crypto_unencapsulate($diaspora_meta,$key),true); + } + else + $meta = $diaspora_meta; + } + $signed_text = $meta['signed_text']; + $authorsig = $meta['signature']; + $signer = $meta['signer']; + $text = $meta['body']; + } + else { + $text = bb2diaspora_itembody($item); + + // sign it + + if($like) + $signed_text = $item['mid'] . ';' . $target_type . ';' . $parent['mid'] . ';' . $positive . ';' . $myaddr; + else + $signed_text = $item['mid'] . ';' . $parent['mid'] . ';' . $text . ';' . $myaddr; + + $authorsig = base64_encode(rsa_sign($signed_text,$owner['channel_prvkey'],'sha256')); + + } + + $msg = replace_macros($tpl,array( + '$guid' => xmlify($item['mid']), + '$parent_guid' => xmlify($parent['mid']), + '$target_type' =>xmlify($target_type), + '$authorsig' => xmlify($authorsig), + '$body' => xmlify($text), + '$positive' => xmlify($positive), + '$handle' => xmlify($myaddr) + )); + + logger('diaspora_followup: base message: ' . $msg, LOGGER_DATA); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey'],$public_batch))); + + + return(diaspora_transmit($owner,$contact,$slap,$public_batch)); +} + + +function diaspora_send_relay($item,$owner,$contact,$public_batch = false) { + + + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . get_app()->get_hostname(); + + $text = bb2diaspora_itembody($item); + + $body = $text; + + // Diaspora doesn't support threaded comments, but some + // versions of Diaspora (i.e. Diaspora-pistos) support + // likes on comments + + if($item['verb'] === ACTIVITY_LIKE && $item['thr_parent']) { + $p = q("select * from item where mid = '%s' limit 1", + dbesc($item['thr_parent']) + ); + } + else { + // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always + // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent. + // The only item with `parent` and `id` as the parent id is the parent item. + $p = q("select * from item where parent = %d and id = %d limit 1", + intval($item['parent']), + intval($item['parent']) + ); + } + + if($p) + $parent = $p[0]; + else { + logger('diaspora_send_relay: no parent'); + return; + } + + $like = false; + $relay_retract = false; + $sql_sign_id = 'iid'; + + if( $item['item_restrict'] & ITEM_DELETED) { + $relay_retract = true; + + $target_type = ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment'); + + $sql_sign_id = 'retract_iid'; + $tpl = get_markup_template('diaspora_relayable_retraction.tpl'); + } + elseif($item['verb'] === ACTIVITY_LIKE) { + $like = true; + + $target_type = ( $parent['mid'] === $parent['parent_mid'] ? 'Post' : 'Comment'); +// $positive = (($item['item_restrict'] & ITEM_DELETED) ? 'false' : 'true'); + $positive = 'true'; + + $tpl = get_markup_template('diaspora_like_relay.tpl'); + } + else { // item is a comment + $tpl = get_markup_template('diaspora_comment_relay.tpl'); + } + + $diaspora_meta = (($item['diaspora_meta']) ? json_decode($item['diaspora_meta'],true) : ''); + if($diaspora_meta) { + if(array_key_exists('iv',$diaspora_meta)) { + $key = get_config('system','prvkey'); + $meta = json_decode(crypto_unencapsulate($diaspora_meta,$key),true); + } + else + $meta = $diaspora_meta; + $sender_signed_text = $meta['signed_text']; + $authorsig = $meta['signature']; + $handle = $meta['signer']; + $text = $meta['body']; + } + else + logger('diaspora_send_relay: original author signature not found'); + + /* Since the author signature is only checked by the parent, not by the relay recipients, + * I think it may not be necessary for us to do so much work to preserve all the original + * signatures. The important thing that Diaspora DOES need is the original creator's handle. + * Let's just generate that and forget about all the original author signature stuff. + * + * Note: this might be more of an problem if we want to support likes on comments for older + * versions of Diaspora (diaspora-pistos), but since there are a number of problems with + * doing that, let's ignore it for now. + * + * + */ +// bug - nomadic identity may/will affect diaspora_handle_from_contact + if(! $handle) { + if($item['author_xchan'] === $owner['channel_hash']) + $handle = $owner['channel_address'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3); + else + $handle = diaspora_handle_from_contact($item['author_xchan']); + } + if(! $handle) { + logger('diaspora_send_relay: no handle'); + return; + } + + if(! $sender_signed_text) { + if($relay_retract) + $sender_signed_text = $item['mid'] . ';' . $target_type; + elseif($like) + $sender_signed_text = $positive . ';' . $item['mid'] . ';' . $target_type . ';' . $parent['mid'] . ';' . $handle; + else + $sender_signed_text = $item['mid'] . ';' . $parent['mid'] . ';' . $text . ';' . $handle; + } + + // Sign the relayable with the top-level owner's signature + // + // We'll use the $sender_signed_text that we just created, instead of the $signed_text + // stored in the database, because that provides the best chance that Diaspora will + // be able to reconstruct the signed text the same way we did. This is particularly a + // concern for the comment, whose signed text includes the text of the comment. The + // smallest change in the text of the comment, including removing whitespace, will + // make the signature verification fail. Since we translate from BB code to Diaspora's + // markup at the top of this function, which is AFTER we placed the original $signed_text + // in the database, it's hazardous to trust the original $signed_text. + + $parentauthorsig = base64_encode(rsa_sign($sender_signed_text,$owner['channel_prvkey'],'sha256')); + + if(! $text) + logger('diaspora_send_relay: no text'); + + $msg = replace_macros($tpl,array( + '$guid' => xmlify($item['mid']), + '$parent_guid' => xmlify($parent['mid']), + '$target_type' =>xmlify($target_type), + '$authorsig' => xmlify($authorsig), + '$parentsig' => xmlify($parentauthorsig), + '$body' => xmlify($text), + '$positive' => xmlify($positive), + '$handle' => xmlify($handle) + )); + + logger('diaspora_send_relay: base message: ' . $msg, LOGGER_DATA); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey'],$public_batch))); + + return(diaspora_transmit($owner,$contact,$slap,$public_batch)); + +} + + + +function diaspora_send_retraction($item,$owner,$contact,$public_batch = false) { + + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . get_app()->get_hostname(); + + // Check whether the retraction is for a top-level post or whether it's a relayable + if( $item['mid'] !== $item['parent_mid'] ) { + + $tpl = get_markup_template('diaspora_relay_retraction.tpl'); + $target_type = (($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment'); + } + else { + + $tpl = get_markup_template('diaspora_signed_retract.tpl'); + $target_type = 'StatusMessage'; + } + + $signed_text = $item['mid'] . ';' . $target_type; + + $msg = replace_macros($tpl, array( + '$guid' => xmlify($item['mid']), + '$type' => xmlify($target_type), + '$handle' => xmlify($myaddr), + '$signature' => xmlify(base64_encode(rsa_sign($signed_text,$owner['channel_prvkey'],'sha256'))) + )); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey'],$public_batch))); + + return(diaspora_transmit($owner,$contact,$slap,$public_batch)); +} + +function diaspora_send_mail($item,$owner,$contact) { + + $a = get_app(); + $myaddr = $owner['channel_address'] . '@' . get_app()->get_hostname(); + + $r = q("select * from conv where id = %d and uid = %d limit 1", + intval($item['convid']), + intval($item['channel_id']) + ); + + if(! count($r)) { + logger('diaspora_send_mail: conversation not found.'); + return; + } + $cnv = $r[0]; + + $conv = array( + 'guid' => xmlify($cnv['guid']), + 'subject' => xmlify($cnv['subject']), + 'created_at' => xmlify(datetime_convert('UTC','UTC',$cnv['created'],'Y-m-d H:i:s \U\T\C')), + 'diaspora_handle' => xmlify($cnv['creator']), + 'participant_handles' => xmlify($cnv['recips']) + ); + + if(array_key_exists('mail_flags',$item) && ($item['mail_flags'] & MAIL_OBSCURED)) { + $key = get_config('system','prvkey'); +// if($item['title']) +// $item['title'] = crypto_unencapsulate(json_decode_plus($item['title']),$key); + if($item['body']) + $item['body'] = crypto_unencapsulate(json_decode_plus($item['body']),$key); + } + + + $body = bb2diaspora($item['body']); + $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C'); + + $signed_text = $item['mid'] . ';' . $cnv['guid'] . ';' . $body . ';' + . $created . ';' . $myaddr . ';' . $cnv['guid']; + + $sig = base64_encode(rsa_sign($signed_text,$owner['channel_prvkey'],'sha256')); + + $msg = array( + 'guid' => xmlify($item['mid']), + 'parent_guid' => xmlify($cnv['guid']), + 'parent_author_signature' => (($item['reply']) ? null : xmlify($sig)), + 'author_signature' => xmlify($sig), + 'text' => xmlify($body), + 'created_at' => xmlify($created), + 'diaspora_handle' => xmlify($myaddr), + 'conversation_guid' => xmlify($cnv['guid']) + ); + + if($item['reply']) { + $tpl = get_markup_template('diaspora_message.tpl'); + $xmsg = replace_macros($tpl, array('$msg' => $msg)); + } + else { + $conv['messages'] = array($msg); + $tpl = get_markup_template('diaspora_conversation.tpl'); + $xmsg = replace_macros($tpl, array('$conv' => $conv)); + } + + logger('diaspora_conversation: ' . print_r($xmsg,true), LOGGER_DATA); + + $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['channel_prvkey'],$contact['xchan_pubkey'],false))); + + return(diaspora_transmit($owner,$contact,$slap,false)); + + +} + +function diaspora_transmit($owner,$contact,$slap,$public_batch,$queue_run=false) { + + $enabled = intval(get_config('system','diaspora_enabled')); + if(! $enabled) { + return 200; + } + + if($public_batch) + $dest_url = $contact['hubloc_callback'] . '/public'; + else + $dest_url = $contact['hubloc_callback'] . '/users/' . $contact['hubloc_guid']; + + logger('diaspora_transmit: URL: ' . $dest_url, LOGGER_DEBUG); + + if(intval(get_config('system','diaspora_test'))) + return 200; + + $a = get_app(); + $logid = random_string(4); + + logger('diaspora_transmit: ' . $logid . ' ' . $dest_url, LOGGER_DEBUG); + + $hash = random_string(); + + $interval = ((get_config('system','delivery_interval') !== false) + ? intval(get_config('system','delivery_interval')) : 2 ); + + q("insert into outq ( outq_hash, outq_account, outq_channel, outq_driver, outq_posturl, outq_async, outq_created, outq_updated, outq_notify, outq_msg ) values ( '%s', %d, %d, '%s', '%s', %d, '%s', '%s', '%s', '%s' )", + dbesc($hash), + intval($owner['account_id']), + intval($owner['channel_id']), + dbesc('post'), + dbesc($dest_url), + intval(1), + dbesc(datetime_convert()), + dbesc(datetime_convert()), + dbesc(''), + dbesc($slap) + ); + + proc_run('php','include/deliver.php',$hash); + if($interval) + @time_sleep_until(microtime(true) + (float) $interval); + +} |