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upload connection graphics & update doxygen headers to insert link to the spec

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rabuzarus 2016-11-28 16:23:47 +01:00
parent a7fbc994e0
commit ac39928e5d
7 changed files with 405 additions and 16 deletions
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3
include/dfrn.php
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@ -3,7 +3,8 @@
* @file include/dfrn.php * @file include/dfrn.php
* @brief The implementation of the dfrn protocol * @brief The implementation of the dfrn protocol
* *
* https://github.com/friendica/friendica/wiki/Protocol * @see https://github.com/friendica/friendica/wiki/Protocol and
* https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
*/ */
require_once("include/Contact.php"); require_once("include/Contact.php");

30
mod/dfrn_confirm.php
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@ -1,17 +1,21 @@
<?php <?php
/* /**
* Module: dfrn_confirm * @file mod/dfrn_confirm.php
* @brief Module: dfrn_confirm
* Purpose: Friendship acceptance for DFRN contacts * Purpose: Friendship acceptance for DFRN contacts
* *.
* There are two possible entry points and three scenarios. * There are two possible entry points and three scenarios.
* *.
* 1. A form was submitted by our user approving a friendship that originated elsewhere. * 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. * 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 * 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. * interact with that process on our own user's behalf.
* *.
* @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
* You also find a graphic which describes the confirmation process at
* https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_confirmation.png
*/ */
require_once('include/enotify.php'); require_once('include/enotify.php');
@ -22,7 +26,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
if(is_array($handsfree)) { if(is_array($handsfree)) {
/** /*
* We were called directly from dfrn_request due to automatic friend acceptance. * We were called directly from dfrn_request due to automatic friend acceptance.
* Any $_POST parameters we may require are supplied in the $handsfree array. * Any $_POST parameters we may require are supplied in the $handsfree array.
* *
@ -37,7 +41,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
$node = $a->argv[1]; $node = $a->argv[1];
} }
/** /*
* *
* Main entry point. Scenario 1. Our user received a friend request notification (perhaps * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
* from another site) and clicked 'Approve'. * from another site) and clicked 'Approve'.
@ -87,7 +91,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
$activity = ((x($_POST,'activity')) ? intval($_POST['activity']) : 0 ); $activity = ((x($_POST,'activity')) ? intval($_POST['activity']) : 0 );
} }
/** /*
* *
* Ensure that dfrn_id has precedence when we go to find the contact record. * Ensure that dfrn_id has precedence when we go to find the contact record.
* We only want to search based on contact id if there is no dfrn_id, * We only want to search based on contact id if there is no dfrn_id,
@ -103,7 +107,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
logger('Confirming follower with contact_id: ' . $cid); logger('Confirming follower with contact_id: ' . $cid);
/** /*
* *
* The other person will have been issued an ID when they first requested friendship. * The other person will have been issued an ID when they first requested friendship.
* Locate their record. At this time, their record will have both pending and blocked set to 1. * Locate their record. At this time, their record will have both pending and blocked set to 1.
@ -139,7 +143,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
if($network === NETWORK_DFRN) { if($network === NETWORK_DFRN) {
/** /*
* *
* Generate a key pair for all further communications with this person. * Generate a key pair for all further communications with this person.
* We have a keypair for every contact, and a site key for unknown people. * We have a keypair for every contact, and a site key for unknown people.
@ -166,7 +170,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
$params = array(); $params = array();
/** /*
* *
* Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
* site private key (person on the other end can decrypt it with our site public key). * site private key (person on the other end can decrypt it with our site public key).
@ -212,7 +216,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA); logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
/** /*
* *
* POST all this stuff to the other site. * POST all this stuff to the other site.
* Temporarily raise the network timeout to 120 seconds because the default 60 * Temporarily raise the network timeout to 120 seconds because the default 60
@ -506,7 +510,7 @@ function dfrn_confirm_post(&$a,$handsfree = null) {
//NOTREACHED //NOTREACHED
} }
/** /*
* *
* *
* End of Scenario 1. [Local confirmation of remote friend request]. * End of Scenario 1. [Local confirmation of remote friend request].

9
mod/dfrn_notify.php
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@ -1,5 +1,10 @@
<?php <?php
/**
* @file mod/dfrn_notify.php
* @brief The dfrn notify endpoint
* @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
*/
require_once('include/items.php'); require_once('include/items.php');
require_once('include/dfrn.php'); require_once('include/dfrn.php');
require_once('include/event.php'); require_once('include/event.php');
@ -7,7 +12,7 @@ require_once('include/event.php');
require_once('library/defuse/php-encryption-1.2.1/Crypto.php'); require_once('library/defuse/php-encryption-1.2.1/Crypto.php');
function dfrn_notify_post(&$a) { function dfrn_notify_post(&$a) {
logger(__function__, LOGGER_TRACE); logger(__function__, LOGGER_TRACE);
$dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : ''); $dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : '');
$dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0); $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
$challenge = ((x($_POST,'challenge')) ? notags(trim($_POST['challenge'])) : ''); $challenge = ((x($_POST,'challenge')) ? notags(trim($_POST['challenge'])) : '');
@ -117,7 +122,7 @@ function dfrn_notify_post(&$a) {
if($dissolve == 1) { if($dissolve == 1) {
/** /*
* Relationship is dissolved permanently * Relationship is dissolved permanently
*/ */

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spec/dfrn2_contact_confirmation.svg Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
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<style type="text/css"><![CDATA[
text { font:12px Dialog; }
]]></style>
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<text x="649" y="76" style="font:18px Open Sans">Friendica - Contact confirmation</text>
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<text x="197" y="221" style="font:13px Tahoma">karen@karenhompage.com</text>
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<text x="230" y="348" style="font:13px Open Sans">notifications.php</text>
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<text x="45" y="432" style="font:13px Open Sans">notifications_content()</text>
<text x="45" y="455" style="font:13px Open Sans">-----------------------------------------</text>
<text x="45" y="501" style="font:13px Open Sans">- This is the page where Karen see Bobs friendship request</text>
<text x="45" y="524" style="font:13px Open Sans">- the submit form redirects to Karens local dfrn_confirm page </text>
<text x="45" y="547" style="font:13px Open Sans">($dfrn_id, $contact_id, $intro_id are submitted)</text>
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<text x="234" y="663" style="font:13px Open Sans">dfrn_confirm.php</text>
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<text x="29" y="721" style="font:13px Open Sans">dfrn_confirm_post()</text>
<text x="29" y="744" style="font:13px Open Sans">SCENARIO 1 ( no $_POST['source_url'] available)</text>
<text x="29" y="767" style="font:13px Open Sans">--------------------------------------------------------------------------------</text>
<text x="29" y="813" style="font:13px Open Sans">- contact data come either form $handsfree (if autoconfirm) or </text>
<text x="29" y="836" style="font:13px Open Sans">from $_POST</text>
<text x="29" y="882" style="font:13px Open Sans">- get all data about Karen form the user table</text>
<text x="29" y="928" style="font:13px Open Sans">[Note: Bob have been issued an ID (contact issue-id) when he first </text>
<text x="29" y="951" style="font:13px Open Sans">requested the friendship. Locate Bobs contact record. At this </text>
<text x="29" y="974" style="font:13px Open Sans">time, his record will have both pending and blocked set to 1. </text>
<text x="29" y="997" style="font:13px Open Sans">There won't be any dfrn_id if this is a network follower, so use </text>
<text x="29" y="1020" style="font:13px Open Sans">the contact_id instead]</text>
<text x="29" y="1066" style="font:13px Open Sans">- search for Bob in the contact table by contact_id, dfrn_id and </text>
<text x="29" y="1089" style="font:13px Open Sans">issued-id not empty (for the uid -&gt; Karens user id)</text>
<text x="29" y="1135" style="font:13px Open Sans">- if network = dfrn </text>
<text x="29" y="1158" style="font:13px Open Sans"> -&gt; create a new keypair (prvkey &amp; pubkey) and update the </text>
<text x="29" y="1181" style="font:13px Open Sans">contact</text>
<text x="29" y="1227" style="font:13px Open Sans">[Note: Generate a key pair for all further communications with </text>
<text x="29" y="1250" style="font:13px Open Sans">this person. We have a keypair for every contact, and a site key </text>
<text x="29" y="1273" style="font:13px Open Sans">for unknown people. This provides a means to carry on </text>
<text x="29" y="1296" style="font:13px Open Sans">relationships with other people any single key is compromised. It </text>
<text x="29" y="1319" style="font:13px Open Sans">is a robust key. We're much more worried about key leakage </text>
<text x="29" y="1342" style="font:13px Open Sans">than anybody cracking it.]</text>
<text x="29" y="1388" style="font:13px Open Sans"> -&gt; update Bobs contact record (in the contact table) with the </text>
<text x="29" y="1411" style="font:13px Open Sans">generated prvkey</text>
<text x="29" y="1457" style="font:13px Open Sans"> -&gt; encrypting the dfrn_id with Karens prvkey (Bob can decrypt it </text>
<text x="29" y="1480" style="font:13px Open Sans">on the other and with Karens site-pubkey) and add it to the </text>
<text x="29" y="1503" style="font:13px Open Sans">transmit params.</text>
<text x="29" y="1549" style="font:13px Open Sans"> -&gt; encrypting Karens profile url with Bobs site-pubkey (Bob </text>
<text x="29" y="1572" style="font:13px Open Sans">can decrypt it with his own private key) and add it to the </text>
<text x="29" y="1595" style="font:13px Open Sans">transmit params.</text>
<text x="29" y="1641" style="font:13px Open Sans"> -&gt; add the above generated public key to params which </text>
<text x="29" y="1664" style="font:13px Open Sans">getting transmitted (if $aes_allow -&gt; encrypt the the public key)</text>
<text x="29" y="1710" style="font:13px Open Sans"> -&gt; add duplex state and page-flags to the params</text>
<text x="29" y="1756" style="font:13px Open Sans"> -&gt; send params to Bobs dfrn_confirm page ($res = </text>
<text x="29" y="1779" style="font:13px Open Sans">post_url($dfrn_confirm,$params);</text>
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<text x="1055" y="1342" style="font:13px Open Sans">dfrn_confirm_post()</text>
<text x="1055" y="1365" style="font:13px Open Sans">SCENARIO 2 ( $_POST['source_url'] is available)</text>
<text x="1055" y="1388" style="font:13px Open Sans">------------------------------------------------------------------------</text>
<text x="1055" y="1434" style="font:13px Open Sans">- get all data about Bob from the user table (prvkey and uid form </text>
<text x="1055" y="1457" style="font:13px Open Sans">Bob )</text>
<text x="1055" y="1503" style="font:13px Open Sans">- decrypt the transmitted source_url (profile url) with Bobs </text>
<text x="1055" y="1526" style="font:13px Open Sans">prvkey</text>
<text x="1055" y="1572" style="font:13px Open Sans">- get data of Karen from contact table by her source_url (and by </text>
<text x="1055" y="1595" style="font:13px Open Sans">her user id)</text>
<text x="1055" y="1641" style="font:13px Open Sans">- decrypt the dfrn_id sent by Karen with Karens site-pubkey </text>
<text x="1055" y="1664" style="font:13px Open Sans">(taken from contact table)</text>
<text x="1055" y="1710" style="font:13px Open Sans">- if possible decrpyt the pubkey sent by Karen with the prvkey of </text>
<text x="1055" y="1733" style="font:13px Open Sans">Bob (taken from user table) -&gt; if this is not possible use the raw </text>
<text x="1055" y="1756" style="font:13px Open Sans">pubkey</text>
<text x="1055" y="1802" style="font:13px Open Sans">- search if the dfrn_id is already present in the contact table (if it </text>
<text x="1055" y="1825" style="font:13px Open Sans">is prensent it is a duplicate)</text>
<text x="1055" y="1871" style="font:13px Open Sans">- update dfrn-id and pubkey for Karens contact entry in the </text>
<text x="1055" y="1894" style="font:13px Open Sans">contact table</text>
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<text x="159" y="1875" style="font:13px Open Sans"> -&gt; set the relation for the contact</text>
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<text x="1142" y="1973" style="font:13px Open Sans">- update the relationship of the contact Karen</text>
<text x="1142" y="2019" style="font:13px Open Sans">-&gt; if duplex delete the issued-id</text>
<text x="1142" y="2042" style="font:13px Open Sans">-&gt; set pending to 0</text>
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<text x="1255" y="2140" style="font:13px Open Sans">send a notification</text>
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<text x="205" y="1960" style="font:13px Open Sans">delete the intro of Bob</text>
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<text x="171" y="38" style="font:13px Open Sans">Note: this chart respects only dfrn </text>
<text x="171" y="61" style="font:13px Open Sans">contacts and focuses on key exchange </text>
<text x="171" y="84" style="font:13px Open Sans">(for other areas it might be very </text>
<text x="171" y="106" style="font:13px Open Sans">incomplete)</text>
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<text x="503" y="71" style="font:18px Open Sans">Friendica - Contact request</text>
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<text x="1021" y="259" style="font:13px Tahoma">karenn@karenhompage.com</text>
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<text x="251" y="257" style="font:13px Tahoma">bob@example.com</text>
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<text x="1073" y="386" style="font:13px Open Sans"> dfrn_request.php</text>
<text x="1146" y="409" style="font:13px Open Sans">-</text>
<text x="968" y="432" style="font:13px Open Sans">https://karenhompage/dfrn_request/karin</text>
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<text x="904" y="831" style="font:13px Open Sans">dfrn_request_post - SCENARIO 1</text>
<text x="904" y="854" style="font:13px Open Sans">----------------------------------------------</text>
<text x="904" y="900" style="font:13px Open Sans">- Cleanup old introductions that remain blocked + Cleanup </text>
<text x="904" y="923" style="font:13px Open Sans">any old email intros - which will have a greater lifetime</text>
<text x="904" y="969" style="font:13px Open Sans">- probe_url Bobs posted dfrn_url and get the network with </text>
<text x="904" y="992" style="font:13px Open Sans">webfinger_dfrn</text>
<text x="904" y="1038" style="font:13px Open Sans">- try to select all contact data of Bob (contact table) by the </text>
<text x="904" y="1061" style="font:13px Open Sans">url ($_POST['dfrn_url] and profile uid ($a-&gt;profile['uid']) </text>
<text x="904" y="1084" style="font:13px Open Sans">where self = 0 to look if this contact is already there (if </text>
<text x="904" y="1107" style="font:13px Open Sans">issued-id or rel is already available return here because it </text>
<text x="904" y="1130" style="font:13px Open Sans">seems that we are already connected)</text>
<text x="904" y="1176" style="font:13px Open Sans">- create a issued-id with $issued_id = random_string();</text>
<text x="904" y="1222" style="font:13px Open Sans">- if we already found a contact record above update the </text>
<text x="904" y="1245" style="font:13px Open Sans">issued-id with the one we have created</text>
<text x="904" y="1291" style="font:13px Open Sans">- otherwise if Bob is not already in the contact table scrape </text>
<text x="904" y="1314" style="font:13px Open Sans">Bobs profile and create a new contact with this data (e.g. </text>
<text x="904" y="1337" style="font:13px Open Sans">the scraped issued-id / profiles pubkey becomes contacts </text>
<text x="904" y="1360" style="font:13px Open Sans">site-pubkey) in the contact table</text>
<text x="904" y="1406" style="font:13px Open Sans">- select this created contact from contact table and create </text>
<text x="904" y="1429" style="font:13px Open Sans">an intro in the intro table (blocked = 1)</text>
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<text x="939" y="716" style="font:13px Open Sans">$_POST['dfrn_url'] is transmited and is Bobs profile url</text>
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<text x="902" y="1580" style="font:13px Open Sans">redirect to Bobs request page</text>
<text x="902" y="1626" style="font:13px Open Sans">goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"</text>
<text x="902" y="1649" style="font:13px Open Sans"> . '&amp;dfrn_version=' . </text>
<text x="902" y="1672" style="font:13px Open Sans">DFRN_PROTOCOL_VERSION</text>
<text x="902" y="1695" style="font:13px Open Sans"> . '&amp;confirm_key=' . $hash</text>
<text x="902" y="1718" style="font:13px Open Sans"> . (($aes_allow) ? "&amp;aes_allow=1" : "")</text>
<text x="902" y="1741" style="font:13px Open Sans"> );</text>
<text x="902" y="1787" style="font:13px Open Sans">http://example.com/dfrn_request/bob?dfrn_url=6874747</text>
<text x="902" y="1810" style="font:13px Open Sans">03a2f2f6b6172656e686f6d65706167652e636f6d2f70726f66</text>
<text x="902" y="1833" style="font:13px Open Sans">696c652f6b6172656e&amp;aes_allow=1&amp;confirm_key=”ABC123”</text>
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<text x="302" y="1203" style="font:13px Open Sans">dfrn_request.php</text>
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<text x="149" y="1422" style="font:13px Open Sans">http://example.com/dfrn_request/bob?</text>
<text x="149" y="1445" style="font:13px Open Sans">dfrn_url=</text>
<text x="149" y="1468" style="font:13px Open Sans">687474703a2f2f6b6172656e686f6d65706167652e</text>
<text x="149" y="1491" style="font:13px Open Sans">636f6d2f70726f66696c652f6b6172656e&amp;aes_allow=1&amp;</text>
<text x="149" y="1514" style="font:13px Open Sans">confirm_key=”ABC123”</text>
<text x="149" y="1560" style="font:13px Open Sans">dfrn_request_content()</text>
<text x="149" y="1583" style="font:13px Open Sans">------------------------------------------</text>
<text x="149" y="1606" style="font:13px Open Sans">- copy the posted parameters (dfrn_url, key and so on) </text>
<text x="149" y="1629" style="font:13px Open Sans">to $_POST</text>
<text x="149" y="1698" style="font:13px Open Sans"> dfrn_request_post() - SCENARIO 2 </text>
<text x="149" y="1721" style="font:13px Open Sans">($_POST['localconfirm'] == 1)</text>
<text x="149" y="1744" style="font:13px Open Sans">-----------------------------------------------------------------------</text>
<text x="149" y="1767" style="font:13px Open Sans">- if(local_user() &amp;&amp; ($a-&gt;user['nickname'] == $a-</text>
<text x="149" y="1790" style="font:13px Open Sans">&gt;argv[1]) &amp;&amp; (x($_POST,'dfrn_url')))</text>
<text x="149" y="1813" style="font:13px Open Sans">-&gt;</text>
<text x="149" y="1859" style="font:13px Open Sans">- $confirm_key comes from $_POST</text>
<text x="149" y="1905" style="font:13px Open Sans">- get data for contact Karen (contact table) by </text>
<text x="149" y="1928" style="font:13px Open Sans">$dfrn_url (contacts url and nurl) -&gt; if contact Karen </text>
<text x="149" y="1951" style="font:13px Open Sans">does already have a dfrn-id Bob seems already </text>
<text x="149" y="1974" style="font:13px Open Sans">connected with Karen (abort here)</text>
<text x="149" y="2020" style="font:13px Open Sans">- if this contact (Karen) isn't available in the contact </text>
<text x="149" y="2043" style="font:13px Open Sans">tabel, scrape Karens profile page to pick up the dfrn </text>
<text x="149" y="2066" style="font:13px Open Sans">links, key, fn, and photo</text>
<text x="149" y="2112" style="font:13px Open Sans">- create a contact for Karen in the contact table with </text>
<text x="149" y="2135" style="font:13px Open Sans">the scraped data (Karens pubkey becomes the contact </text>
<text x="149" y="2158" style="font:13px Open Sans">site-pubkey)</text>
<text x="149" y="2204" style="font:13px Open Sans">- fetch_url($dfrn_request . '?confirm_key=' . </text>
<text x="149" y="2227" style="font:13px Open Sans">$confirm_key);</text>
<text x="149" y="2273" style="font:13px Open Sans">- fetch_url(http://karenhomepage.com/dfrn_request?</text>
<text x="149" y="2296" style="font:13px Open Sans">confirm_key=”ABC123”)</text>
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<text x="1075" y="2050" style="font:13px Open Sans">dfrn_request.php</text>
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<text x="871" y="2228" style="font:13px Open Sans">http://karenhomepage.com/dfrn_request?confirm_key=”ABC123”</text>
<text x="871" y="2274" style="font:13px Open Sans">dfrn_request_content() -</text>
<text x="871" y="2297" style="font:13px Open Sans">(elseif((x($_GET,'confirm_key')) &amp;&amp; strlen($_GET['confirm_key'])) )</text>
<text x="871" y="2320" style="font:13px Open Sans">----------------------------------------------------------------------------------------------</text>
<text x="871" y="2366" style="font:13px Open Sans">- select the intro by confirm_key (intro table) -&gt; get contact id</text>
<text x="871" y="2389" style="font:13px Open Sans">- use the intro contact id to get the contact in the contact table</text>
<text x="871" y="2412" style="font:13px Open Sans">- build a notification package ( notification(array.....) )</text>
<text x="871" y="2435" style="font:13px Open Sans">- update intro in intro table (blocked = 0)</text>
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<text x="242" y="2447" style="font:13px Open Sans">Bob stays on his Friendica server</text>
<text x="242" y="2493" style="font:13px Open Sans">- goaway($forwardurl);</text>
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<text x="29" y="38" style="font:13px Open Sans">Note: this chart respects only dfrn </text>
<text x="29" y="61" style="font:13px Open Sans">contacts and focuses on key exchange </text>
<text x="29" y="83" style="font:13px Open Sans">(for other areas it might be very </text>
<text x="29" y="106" style="font:13px Open Sans">incomplete)</text>
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<text x="885" y="514" style="font:13px Open Sans">dfrn_request_content()</text>
<text x="885" y="537" style="font:13px Open Sans">------------------------------------</text>
<text x="885" y="583" style="font:13px Open Sans">- the page for the on Katrins server where Bob do a connection </text>
<text x="885" y="606" style="font:13px Open Sans">request</text>
<text x="885" y="629" style="font:13px Open Sans">- the form transmit on submit Bobs profile url as dfrn_url</text>
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<text x="405" y="323" style="font:10px Georgia">bob wants to make a request and is directed from karens profile page to karens dfrn-request page</text>
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<text x="576" y="1385" style="font:10px Georgia">redirict to bobs dfrn_request page</text>
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<text x="652" y="2169" style="font:10px Georgia">http://karenhomepage.com/dfrn_request?confirm_key=”ABC123”</text>
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<text x="1029" y="672" style="font:10px Georgia">Bob fills request form and presses submit</text>
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