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diaspora protocol changes

pull/1/head
Friendika 10 years ago
parent
commit
5c0e135fe9
  1. 170
      include/diaspora.php
  2. 34
      mod/receive.php

170
include/diaspora.php

@ -5,34 +5,52 @@ require_once('include/items.php');
require_once('include/bb2diaspora.php');
require_once('include/contact_selectors.php');
function diaspora_dispatch_public($msg) {
$r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN ( SELECT `uid` FROM `contact` WHERE `network` = '%s' AND `addr` = '%s' ) ",
dbesc(NETWORK_DIASPORA),
dbesc($msg['author'])
);
if(count($r)) {
foreach($r as $rr) {
diaspora_dispatch($rr,$msg);
}
}
}
function diaspora_dispatch($importer,$msg) {
$ret = 0;
$parsed_xml = parse_xml_string($msg['message'],false);
$xmlbase = $parsed_xml->post;
if($xmlbase->request) {
diaspora_request($importer,$xmlbase->request);
$ret = diaspora_request($importer,$xmlbase->request);
}
elseif($xmlbase->status_message) {
diaspora_post($importer,$xmlbase->status_message);
$ret = diaspora_post($importer,$xmlbase->status_message);
}
elseif($xmlbase->comment) {
diaspora_comment($importer,$xmlbase->comment,$msg);
$ret = diaspora_comment($importer,$xmlbase->comment,$msg);
}
elseif($xmlbase->like) {
diaspora_like($importer,$xmlbase->like,$msg);
$ret = diaspora_like($importer,$xmlbase->like,$msg);
}
elseif($xmlbase->retraction) {
diaspora_retraction($importer,$xmlbase->retraction,$msg);
$ret = diaspora_retraction($importer,$xmlbase->retraction,$msg);
}
elseif($xmlbase->photo) {
diaspora_photo($importer,$xmlbase->photo,$msg);
$ret = diaspora_photo($importer,$xmlbase->photo,$msg);
}
else {
logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true));
}
return;
return $ret;
}
function diaspora_get_contact_by_handle($uid,$handle) {
@ -106,16 +124,14 @@ function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey) {
$b64url_data = base64url_encode($b64_data);
$b64url_stripped = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
$lines = str_split($b64url_stripped,60);
$data = implode("\n",$lines);
$data = $data . (($data[-1] != "\n") ? "\n" : '') ;
$data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
$type = 'application/atom+xml';
$encoding = 'base64url';
$alg = 'RSA-SHA256';
$signable_data = $data . '.' . base64url_encode($type) . "\n" . '.'
. base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n";
$signable_data = $data . '.' . base64url_encode($type) . '.'
. base64url_encode($encoding) . '.' . base64url_encode($alg) ;
$signature = rsa_sign($signable_data,$prvkey);
$sig = base64url_encode($signature);
@ -157,7 +173,7 @@ $magic_env = <<< EOT
<me:env xmlns:me="http://salmon-protocol.org/ns/magic-env">
<me:encoding>base64url</me:encoding>
<me:alg>RSA-SHA256</me:alg>
<me:data type="application/atom+xml">$data</me:data>
<me:data type="application/xml">$data</me:data>
<me:sig>$sig</me:sig>
</me:env>
</entry>
@ -185,50 +201,67 @@ EOT;
function diaspora_decode($importer,$xml) {
$public = false;
$basedom = parse_xml_string($xml);
$atom = $basedom->children(NAMESPACE_ATOM1);
$children = $basedom->children(NAMESPACE_DIASPORA_PROTOCOL);
// Diaspora devs: This is kind of sucky - 'encrypted_header' does not belong in the atom namespace
if($children->header) {
$public = true;
$author_link = str_replace('acct:','',$children->author_id);
}
else {
$encrypted_header = json_decode(base64_decode($atom->encrypted_header));
$encrypted_header = json_decode(base64_decode($children->encrypted_header));
$encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
$ciphertext = base64_decode($encrypted_header->ciphertext);
$encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
$ciphertext = base64_decode($encrypted_header->ciphertext);
$outer_key_bundle = '';
openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['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);
$outer_key_bundle = '';
openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
/**
* $decrypted now contains something like
*
* <decrypted_header>
* <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
* <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
$j_outer_key_bundle = json_decode($outer_key_bundle);
***** OBSOLETE
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
* <author>
* <name>Ryan Hughes</name>
* <uri>acct:galaxor@diaspora.pirateship.org</uri>
* </author>
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
***** CURRENT
* <author_id>acct:galaxor@diaspora.priateship.org</author_id>
$decrypted = pkcs5_unpad($decrypted);
***** END DIFFS
/**
* $decrypted now contains something like
*
* <decrypted_header>
* <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
* <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
* <author>
* <name>Ryan Hughes</name>
* <uri>acct:galaxor@diaspora.pirateship.org</uri>
* </author>
* </decrypted_header>
*/
* </decrypted_header>
*/
logger('decrypted: ' . $decrypted, LOGGER_DEBUG);
$idom = parse_xml_string($decrypted,false);
logger('decrypted: ' . $decrypted, LOGGER_DEBUG);
$idom = parse_xml_string($decrypted,false);
$inner_iv = base64_decode($idom->iv);
$inner_aes_key = base64_decode($idom->aes_key);
$inner_iv = base64_decode($idom->iv);
$inner_aes_key = base64_decode($idom->aes_key);
$author_link = str_replace('acct:','',$idom->author->uri);
$author_link = str_replace('acct:','',$idom->author_id);
}
$dom = $basedom->children(NAMESPACE_SALMON_ME);
@ -262,8 +295,8 @@ function diaspora_decode($importer,$xml) {
// and transport whitespace mangling, and base64 wrapping rules. Guess what? PHP and Ruby
// use different linelengths for base64 output.
$lines = str_split($data,60);
$data = implode("\n",$lines);
// $lines = str_split($data,60);
// $data = implode("\n",$lines);
// stash away some other stuff for later
@ -273,22 +306,25 @@ function diaspora_decode($importer,$xml) {
$encoding = $base->encoding;
$alg = $base->alg;
// I can't even begin to tell you how sucky this is. Please read the spec.
$signed_data = $data . (($data[-1] != "\n") ? "\n" : '') . '.' . base64url_encode($type) . "\n" . '.' . base64url_encode($encoding) . "\n" . '.' . base64url_encode($alg) . "\n";
$signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
// decode the data
$data = base64url_decode($data);
// Now pull out the inner encrypted blob
$inner_encrypted = base64_decode($data);
if($public) {
$inner_decrypted = $data;
}
else {
$inner_decrypted =
$inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
// Decode the encrypted blob
$inner_decrypted = pkcs5_unpad($inner_decrypted);
$inner_encrypted = base64_decode($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(! $author_link) {
logger('mod-diaspora: Could not retrieve author URI.');
@ -321,7 +357,6 @@ function diaspora_decode($importer,$xml) {
}
function diaspora_request($importer,$xml) {
$sender_handle = unxmlify($xml->sender_handle);
@ -332,7 +367,6 @@ function diaspora_request($importer,$xml) {
$contact = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
if($contact) {
// perhaps we were already sharing with this person. Now they're sharing with us.
@ -408,8 +442,7 @@ function diaspora_post($importer,$xml) {
if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
logger('diaspora_post: Ignoring this author.');
http_status_exit(202);
// NOTREACHED
return 202;
}
$message_id = $diaspora_handle . ':' . $guid;
@ -493,8 +526,7 @@ function diaspora_comment($importer,$xml,$msg) {
if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
logger('diaspora_comment: Ignoring this author.');
http_status_exit(202);
// NOTREACHED
return 202;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
@ -535,7 +567,7 @@ function diaspora_comment($importer,$xml,$msg) {
}
}
if(! rsa_verify($author_signed_data,$author_signature,$key,'sha')) {
if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
logger('diaspora_comment: verification failed.');
return;
}
@ -548,7 +580,7 @@ function diaspora_comment($importer,$xml,$msg) {
$key = $msg['key'];
if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha')) {
if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
logger('diaspora_comment: owner verification failed.');
return;
}
@ -633,8 +665,7 @@ function diaspora_photo($importer,$xml,$msg) {
if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
logger('diaspora_photo: Ignoring this author.');
http_status_exit(202);
// NOTREACHED
return 202;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
@ -686,8 +717,7 @@ function diaspora_like($importer,$xml,$msg) {
if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
logger('diaspora_like: Ignoring this author.');
http_status_exit(202);
// NOTREACHED
return 202;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
@ -743,7 +773,7 @@ function diaspora_like($importer,$xml,$msg) {
}
}
if(! rsa_verify($author_signed_data,$author_signature,$key,'sha')) {
if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
logger('diaspora_like: verification failed.');
return;
}
@ -756,7 +786,7 @@ function diaspora_like($importer,$xml,$msg) {
$key = $msg['key'];
if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha')) {
if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
logger('diaspora_like: owner verification failed.');
return;
}
@ -877,7 +907,7 @@ function diaspora_retraction($importer,$xml) {
}
}
http_exit_status(202);
return 202;
// NOTREACHED
}
@ -1044,7 +1074,7 @@ function diaspora_send_followup($item,$owner,$contact) {
else
$signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $myaddr;
$authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha'));
$authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
$msg = replace_macros($tpl,array(
'$guid' => xmlify($item['guid']),
@ -1131,7 +1161,7 @@ function diaspora_send_relay($item,$owner,$contact) {
else
$signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $myaddr;
$authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha'));
$authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
intval($item['id']),
@ -1145,7 +1175,7 @@ function diaspora_send_relay($item,$owner,$contact) {
// sign it
$parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha'));
$parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
$msg = replace_macros($tpl,array(
'$guid' => xmlify($item['guid']),

34
mod/receive.php

@ -12,18 +12,26 @@ require_once('include/diaspora.php');
function receive_post(&$a) {
if($a->argc != 3 || $a->argv[1] !== 'users')
http_status_exit(500);
$public = false;
$guid = $a->argv[2];
if(($a->argc == 2) && ($a->argv[1] === 'public')) {
$public = true;
}
else {
$r = q("SELECT * FROM `user` WHERE `guid` = '%s' LIMIT 1",
dbesc($guid)
);
if(! count($r))
http_status_exit(500);
if($a->argc != 3 || $a->argv[1] !== 'users')
http_status_exit(500);
$guid = $a->argv[2];
$r = q("SELECT * FROM `user` WHERE `guid` = '%s' LIMIT 1",
dbesc($guid)
);
if(! count($r))
http_status_exit(500);
$importer = $r[0];
$importer = $r[0];
}
// It is an application/x-www-form-urlencoded
@ -41,9 +49,13 @@ function receive_post(&$a) {
if(! is_array($msg))
http_status_exit(500);
diaspora_dispatch($importer,$msg);
$ret = 0;
if($public)
diaspora_dispatch_public($msg);
else
$ret = diaspora_dispatch($importer,$msg);
http_status_exit(200);
http_status_exit(($ret) ? $ret : 200);
// NOTREACHED
}

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