diff options
Diffstat (limited to 'mod/dfrn_confirm.php')
| -rw-r--r-- | mod/dfrn_confirm.php | 178 |
1 files changed, 116 insertions, 62 deletions
diff --git a/mod/dfrn_confirm.php b/mod/dfrn_confirm.php index 950d589f3..7018bf52b 100644 --- a/mod/dfrn_confirm.php +++ b/mod/dfrn_confirm.php @@ -1,14 +1,28 @@ <?php -// There are two possible entry points. - +/* + * Module: dfrn_confirm + * Purpose: Friendship acceptance for DFRN contacts + * + * There are two possible entry points and three scenarios. + * + * 1. A form was submitted by our user approving a friendship that originated elsewhere. + * This may also be called from dfrn_request to automatically approve a friendship. + * + * 2. We may be the target or other side of the conversation to scenario 1, and will + * interact with that process on our own user's behalf. + * + */ function dfrn_confirm_post(&$a,$handsfree = null) { if(is_array($handsfree)) { - // called directly from dfrn_request due to automatic friend acceptance - // any $_POST parameters we may require are supplied in the $handsfree array + /** + * We were called directly from dfrn_request due to automatic friend acceptance. + * Any $_POST parameters we may require are supplied in the $handsfree array. + * + */ $node = $handsfree['node']; $a->interactive = false; // notice() becomes a no-op since nobody is there to see it @@ -19,10 +33,17 @@ function dfrn_confirm_post(&$a,$handsfree = null) { $node = $a->argv[1]; } - // Main entry point. Our user received a friend request notification (perhaps - // from another site) and clicked 'Approve'. $POST['source_url'] is not set. - // OR we have been called directly from dfrn_request ($handsfree != null) due to - // this being a page type which supports automatic friend acceptance. + /** + * + * Main entry point. Scenario 1. Our user received a friend request notification (perhaps + * from another site) and clicked 'Approve'. + * $POST['source_url'] is not set. If it is, it indicates Scenario 2. + * + * We may also have been called directly from dfrn_request ($handsfree != null) due to + * this being a page type which supports automatic friend acceptance. That is also Scenario 1 + * since we are operating on behalf of our registered user to approve a friendship. + * + */ if(! x($_POST,'source_url')) { @@ -43,35 +64,53 @@ function dfrn_confirm_post(&$a,$handsfree = null) { } - // These come from either the friend request notification form or $handsfree array. + // These data elements may come from either the friend request notification form or $handsfree array. if(is_array($handsfree)) { - $dfrn_id = $handsfree['dfrn_id']; - $intro_id = $handsfree['intro_id']; - $duplex = $handsfree['duplex']; logger('dfrn_confirm: Confirm in handsfree mode'); + $dfrn_id = $handsfree['dfrn_id']; + $intro_id = $handsfree['intro_id']; + $duplex = $handsfree['duplex']; } else { - $dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : ""); - $intro_id = intval($_POST['intro_id']); - $duplex = intval($_POST['duplex']); - $cid = intval($_POST['contact_id']); + $dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : ""); + $intro_id = ((x($_POST,'intro_id')) ? intval($_POST['intro_id']) : 0 ); + $duplex = ((x($_POST,'duplex')) ? intval($_POST['duplex']) : 0 ); + $cid = ((x($_POST,'contact_id')) ? intval($_POST['contact_id']) : 0 ); } + /** + * + * Ensure that dfrn_id has precedence when we go to find the contact record. + * We only want to search based on contact id if there is no dfrn_id, + * e.g. for OStatus network followers. + * + */ + + if(strlen($dfrn_id)) + $cid = 0; + logger('dfrn_confirm: Confirming request for dfrn_id (issued) ' . $dfrn_id); + if($cid) + logger('dfrn_confirm: Confirming follower with contact_id: ' . $cid); - // The other person will have been issued an ID when they first requested friendship. - // Locate their record. At this time, their record will have both pending and blocked set to 1. - // There won't be any dfrn_id if this is a network follower, so use the contact_id instead. + /** + * + * The other person will have been issued an ID when they first requested friendship. + * Locate their record. At this time, their record will have both pending and blocked set to 1. + * There won't be any dfrn_id if this is a network follower, so use the contact_id instead. + * + */ $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d LIMIT 1", - dbesc($dfrn_id), - intval($cid), - intval($uid) + dbesc($dfrn_id), + intval($cid), + intval($uid) ); if(! count($r)) { + logger('dfrn_confirm: Contact not found in DB.'); notice( t('Contact not found.') . EOL ); return; } @@ -88,11 +127,15 @@ function dfrn_confirm_post(&$a,$handsfree = null) { if($network === 'dfrn') { - // Generate a key pair for all further communications with this person. - // We have a keypair for every contact, and a site key for unknown people. - // This provides a means to carry on relationships with other people if - // any single key is compromised. It is a robust key. We're much more - // worried about key leakage than anybody cracking it. + /** + * + * Generate a key pair for all further communications with this person. + * We have a keypair for every contact, and a site key for unknown people. + * This provides a means to carry on relationships with other people if + * any single key is compromised. It is a robust key. We're much more + * worried about key leakage than anybody cracking it. + * + */ $res = openssl_pkey_new(array( 'digest_alg' => 'sha1', @@ -100,7 +143,6 @@ function dfrn_confirm_post(&$a,$handsfree = null) { 'encrypt_key' => false ) ); - $private_key = ''; openssl_pkey_export($res, $private_key); @@ -118,16 +160,20 @@ function dfrn_confirm_post(&$a,$handsfree = null) { $params = array(); - // Per the protocol document, we will verify both ends by encrypting the dfrn_id with our - // site private key (person on the other end can decrypt it with our site public key). - // Then encrypt our profile URL with the other person's site public key. They can decrypt - // it with their site private key. If the decryption on the other end fails for either - // item, it indicates tampering or key failure on at least one site and we will not be - // able to provide a secure communication pathway. - - // If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3 - // or later) then we encrypt the personal public key we send them using AES-256-CBC and a - // random key which is encrypted with their site public key. + /** + * + * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our + * site private key (person on the other end can decrypt it with our site public key). + * Then encrypt our profile URL with the other person's site public key. They can decrypt + * it with their site private key. If the decryption on the other end fails for either + * item, it indicates tampering or key failure on at least one site and we will not be + * able to provide a secure communication pathway. + * + * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3 + * or later) then we encrypt the personal public key we send them using AES-256-CBC and a + * random key which is encrypted with their site public key. + * + */ $src_aes_key = random_string(); @@ -153,7 +199,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) { if($duplex == 1) $params['duplex'] = 1; - logger('dfrn_confirm: Confirm: posted data: ' . print_r($params,true), LOGGER_DATA); + logger('dfrn_confirm: Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA); // POST all this stuff to the other site. @@ -233,9 +279,16 @@ function dfrn_confirm_post(&$a,$handsfree = null) { return; } - // We have now established a relationship with the other site. - // Let's make our own personal copy of their profile photo so we don't have - // to always load it from their site. + + /* + * + * We have now established a relationship with the other site. + * Let's make our own personal copy of their profile photo so we don't have + * to always load it from their site. + * + * We will also update the contact record with the nature and scope of the relationship. + * + */ require_once("Photo.php"); @@ -276,12 +329,11 @@ function dfrn_confirm_post(&$a,$handsfree = null) { ); } else { + // $network !== 'dfrn' $notify = ''; $poll = ''; - // $network !== 'dfrn' - $arr = lrdd($contact['url']); if(count($arr)) { foreach($arr as $link) { @@ -332,31 +384,33 @@ function dfrn_confirm_post(&$a,$handsfree = null) { if($handsfree === null) goaway($a->get_baseurl() . '/contacts/' . intval($contact_id)); - return; //NOTREACHED - + else + return; + //NOTREACHED } - - - // End of first scenario. [Local confirmation of remote friend request]. - - - - // Begin scenario two. This is the remote response to the above scenario. - // This will take place on the site that originally initiated the friend request. - // In the section above where the confirming party makes a POST and - // retrieves xml status information, they are communicating with the following code. + /** + * + * + * End of Scenario 1. [Local confirmation of remote friend request]. + * + * Begin Scenario 2. This is the remote response to the above scenario. + * This will take place on the site that originally initiated the friend request. + * In the section above where the confirming party makes a POST and + * retrieves xml status information, they are communicating with the following code. + * + */ if(x($_POST,'source_url')) { // We are processing an external confirmation to an introduction created by our user. - $public_key = $_POST['public_key']; - $dfrn_id = hex2bin($_POST['dfrn_id']); - $source_url = hex2bin($_POST['source_url']); - $aes_key = $_POST['aes_key']; - $duplex = $_POST['duplex']; - $version_id = (float) $_POST['dfrn_version']; + $public_key = ((x($_POST,'public_key')) ? $_POST['public_key'] : ''); + $dfrn_id = ((x($_POST,'dfrn_id')) ? hex2bin($_POST['dfrn_id']) : ''); + $source_url = ((x($_POST,'source_url')) ? hex2bin($_POST['source_url']) : ''); + $aes_key = ((x($_POST,'aes_key')) ? $_POST['aes_key'] : ''); + $duplex = ((x($_POST,'duplex')) ? intval($_POST['duplex']) : 0 ); + $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0); logger('dfrn_confirm: requestee contacted: ' . $node); |