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<text x="649" y="76" style="font:18px Open Sans">Friendica - Contact confirmation</text>
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<text x="1213" y="225" style="font:13px Tahoma">bob@example.com</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="57" y="1864" style="font:13px Open Sans"> -&gt; set the relation for the contact and set pending = 0 and </text>
<text x="57" y="1887" style="font:13px Open Sans">blocked = 0</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 blocked = 0 and pending = 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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