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Merge pull request #7104 from annando/separated-confirm 

The follow confirmation process is now separated
This commit is contained in:
Philipp 2019-05-06 21:40:11 +02:00 committed by GitHub
parent 14f65b968a 626709159f
commit 7c62a4e02b
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7 changed files with 267 additions and 232 deletions
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381
mod/dfrn_confirm.php
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@ -28,8 +28,6 @@ use Friendica\Model\Contact;
use Friendica\Model\Group;
use Friendica\Model\User;
use Friendica\Network\Probe;
use Friendica\Protocol\Diaspora;
use Friendica\Protocol\ActivityPub;
use Friendica\Util\Crypto;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\Network;
@ -136,165 +134,153 @@ function dfrn_confirm_post(App $a, $handsfree = null)
$site_pubkey = $contact['site-pubkey'];
$dfrn_confirm = $contact['confirm'];
$aes_allow = $contact['aes_allow'];
$protocol = $contact['network'];
// an empty DFRN-ID tells us that it had been a request via AP from a Friendica contact
if (!empty($contact['protocol'])) {
$protocol = $contact['protocol'];
} elseif (($contact['network'] === Protocol::DFRN) && empty($dfrn_id)) {
$protocol = Contact::getProtocol($contact['url'], $contact['network']);
} else {
$protocol = $contact['network'];
/*
* 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 = Crypto::newKeypair(4096);
$private_key = $res['prvkey'];
$public_key = $res['pubkey'];
// Save the private key. Send them the public key.
$fields = ['prvkey' => $private_key, 'protocol' => Protocol::DFRN];
DBA::update('contact', $fields, ['id' => $contact_id]);
$params = [];
/*
* 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 = openssl_random_pseudo_bytes(64);
$result = '';
openssl_private_encrypt($dfrn_id, $result, $user['prvkey']);
$params['dfrn_id'] = bin2hex($result);
$params['public_key'] = $public_key;
$my_url = System::baseUrl() . '/profile/' . $user['nickname'];
openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
$params['source_url'] = bin2hex($params['source_url']);
if ($aes_allow && function_exists('openssl_encrypt')) {
openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
$params['aes_key'] = bin2hex($params['aes_key']);
$params['public_key'] = bin2hex(openssl_encrypt($public_key, 'AES-256-CBC', $src_aes_key));
}
if ($protocol === Protocol::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.
*/
$res = Crypto::newKeypair(4096);
$params['dfrn_version'] = DFRN_PROTOCOL_VERSION;
if ($duplex == 1) {
$params['duplex'] = 1;
}
$private_key = $res['prvkey'];
$public_key = $res['pubkey'];
if ($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) {
$params['page'] = 1;
}
// Save the private key. Send them the public key.
$fields = ['prvkey' => $private_key, 'protocol' => Protocol::DFRN];
DBA::update('contact', $fields, ['id' => $contact_id]);
if ($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
$params['page'] = 2;
}
$params = [];
Logger::log('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params, true), Logger::DATA);
/*
* 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.
*/
/*
*
* POST all this stuff to the other site.
* Temporarily raise the network timeout to 120 seconds because the default 60
* doesn't always give the other side quite enough time to decrypt everything.
*
*/
$src_aes_key = openssl_random_pseudo_bytes(64);
$res = Network::post($dfrn_confirm, $params, null, $redirects, 120)->getBody();
$result = '';
openssl_private_encrypt($dfrn_id, $result, $user['prvkey']);
Logger::log(' Confirm: received data: ' . $res, Logger::DATA);
$params['dfrn_id'] = bin2hex($result);
$params['public_key'] = $public_key;
// Now figure out what they responded. Try to be robust if the remote site is
// having difficulty and throwing up errors of some kind.
$my_url = System::baseUrl() . '/profile/' . $user['nickname'];
$leading_junk = substr($res, 0, strpos($res, '<?xml'));
openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
$params['source_url'] = bin2hex($params['source_url']);
$res = substr($res, strpos($res, '<?xml'));
if (!strlen($res)) {
// No XML at all, this exchange is messed up really bad.
// We shouldn't proceed, because the xml parser might choke,
// and $status is going to be zero, which indicates success.
// We can hardly call this a success.
notice(L10n::t('Response from remote site was not understood.') . EOL);
return;
}
if ($aes_allow && function_exists('openssl_encrypt')) {
openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
$params['aes_key'] = bin2hex($params['aes_key']);
$params['public_key'] = bin2hex(openssl_encrypt($public_key, 'AES-256-CBC', $src_aes_key));
if (strlen($leading_junk) && Config::get('system', 'debugging')) {
// This might be more common. Mixed error text and some XML.
// If we're configured for debugging, show the text. Proceed in either case.
notice(L10n::t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL);
}
if (stristr($res, "<status") === false) {
// wrong xml! stop here!
Logger::log('Unexpected response posting to ' . $dfrn_confirm);
notice(L10n::t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL);
return;
}
$xml = XML::parseString($res);
$status = (int) $xml->status;
$message = XML::unescape($xml->message); // human readable text of what may have gone wrong.
switch ($status) {
case 0:
info(L10n::t("Confirmation completed successfully.") . EOL);
break;
case 1:
// birthday paradox - generate new dfrn-id and fall through.
$new_dfrn_id = Strings::getRandomHex();
q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
DBA::escape($new_dfrn_id),
intval($contact_id),
intval($uid)
);
case 2:
notice(L10n::t("Temporary failure. Please wait and try again.") . EOL);
break;
case 3:
notice(L10n::t("Introduction failed or was revoked.") . EOL);
break;
}
if (strlen($message)) {
notice(L10n::t('Remote site reported: ') . $message . EOL);
}
if (($status == 0) && $intro_id) {
$intro = DBA::selectFirst('intro', ['note'], ['id' => $intro_id]);
if (DBA::isResult($intro)) {
DBA::update('contact', ['reason' => $intro['note']], ['id' => $contact_id]);
}
$params['dfrn_version'] = DFRN_PROTOCOL_VERSION;
if ($duplex == 1) {
$params['duplex'] = 1;
}
// Success. Delete the notification.
DBA::delete('intro', ['id' => $intro_id]);
}
if ($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) {
$params['page'] = 1;
}
if ($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
$params['page'] = 2;
}
Logger::log('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params, true), Logger::DATA);
/*
*
* POST all this stuff to the other site.
* Temporarily raise the network timeout to 120 seconds because the default 60
* doesn't always give the other side quite enough time to decrypt everything.
*
*/
$res = Network::post($dfrn_confirm, $params, null, $redirects, 120)->getBody();
Logger::log(' Confirm: received data: ' . $res, Logger::DATA);
// Now figure out what they responded. Try to be robust if the remote site is
// having difficulty and throwing up errors of some kind.
$leading_junk = substr($res, 0, strpos($res, '<?xml'));
$res = substr($res, strpos($res, '<?xml'));
if (!strlen($res)) {
// No XML at all, this exchange is messed up really bad.
// We shouldn't proceed, because the xml parser might choke,
// and $status is going to be zero, which indicates success.
// We can hardly call this a success.
notice(L10n::t('Response from remote site was not understood.') . EOL);
return;
}
if (strlen($leading_junk) && Config::get('system', 'debugging')) {
// This might be more common. Mixed error text and some XML.
// If we're configured for debugging, show the text. Proceed in either case.
notice(L10n::t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL);
}
if (stristr($res, "<status") === false) {
// wrong xml! stop here!
Logger::log('Unexpected response posting to ' . $dfrn_confirm);
notice(L10n::t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL);
return;
}
$xml = XML::parseString($res);
$status = (int) $xml->status;
$message = XML::unescape($xml->message); // human readable text of what may have gone wrong.
switch ($status) {
case 0:
info(L10n::t("Confirmation completed successfully.") . EOL);
break;
case 1:
// birthday paradox - generate new dfrn-id and fall through.
$new_dfrn_id = Strings::getRandomHex();
q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
DBA::escape($new_dfrn_id),
intval($contact_id),
intval($uid)
);
case 2:
notice(L10n::t("Temporary failure. Please wait and try again.") . EOL);
break;
case 3:
notice(L10n::t("Introduction failed or was revoked.") . EOL);
break;
}
if (strlen($message)) {
notice(L10n::t('Remote site reported: ') . $message . EOL);
}
if (($status == 0) && $intro_id) {
$intro = DBA::selectFirst('intro', ['note'], ['id' => $intro_id]);
if (DBA::isResult($intro)) {
DBA::update('contact', ['reason' => $intro['note']], ['id' => $contact_id]);
}
// Success. Delete the notification.
DBA::delete('intro', ['id' => $intro_id]);
}
if ($status != 0) {
return;
}
} else {
DBA::update('contact', ['protocol' => $protocol], ['id' => $contact_id]);
if ($status != 0) {
return;
}
/*
@ -308,98 +294,39 @@ function dfrn_confirm_post(App $a, $handsfree = null)
Logger::log('dfrn_confirm: confirm - imported photos');
if ($protocol === Protocol::DFRN) {
$new_relation = Contact::FOLLOWER;
$new_relation = Contact::FOLLOWER;
if (($relation == Contact::SHARING) || ($duplex)) {
$new_relation = Contact::FRIEND;
}
if (($relation == Contact::SHARING) && ($duplex)) {
$duplex = 0;
}
$r = q("UPDATE `contact` SET `rel` = %d,
`name-date` = '%s',
`uri-date` = '%s',
`blocked` = 0,
`pending` = 0,
`duplex` = %d,
`hidden` = %d,
`network` = '%s' WHERE `id` = %d
",
intval($new_relation),
DBA::escape(DateTimeFormat::utcNow()),
DBA::escape(DateTimeFormat::utcNow()),
intval($duplex),
intval($hidden),
DBA::escape(Protocol::DFRN),
intval($contact_id)
);
} else {
if ($protocol == Protocol::ACTIVITYPUB) {
ActivityPub\Transmitter::sendContactAccept($contact['url'], $contact['hub-verify'], $uid);
// Setting "pending" to true on a bidirectional contact request could create a problem when it isn't accepted on the other side
// Then we have got a situation where - although one direction is accepted - the contact still appears as pending.
// Possibly we need two different "pending" fields, one for incoming, one for outgoing?
// This has to be thought over, but for now this here is a better solution.
// $pending = $duplex;
$pending = false;
} else {
$pending = false;
}
$arr = Probe::uri($contact['url'], $protocol);
$notify = defaults($contact, 'notify' , $arr['notify']);
$poll = defaults($contact, 'poll' , $arr['poll']);
$addr = $arr['addr'];
$new_relation = $contact['rel'];
$writable = $contact['writable'];
if (in_array($protocol, [Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
if ($duplex) {
$new_relation = Contact::FRIEND;
} else {
$new_relation = Contact::FOLLOWER;
}
if ($new_relation != Contact::FOLLOWER) {
$writable = 1;
}
}
DBA::delete('intro', ['id' => $intro_id]);
$fields = ['name-date' => DateTimeFormat::utcNow(),
'uri-date' => DateTimeFormat::utcNow(), 'addr' => $addr,
'notify' => $notify, 'poll' => $poll, 'blocked' => false,
'pending' => $pending, 'protocol' => $protocol,
'writable' => $writable, 'hidden' => $hidden, 'rel' => $new_relation];
DBA::update('contact', $fields, ['id' => $contact_id]);
if (($relation == Contact::SHARING) || ($duplex)) {
$new_relation = Contact::FRIEND;
}
if (!DBA::isResult($r)) {
notice(L10n::t('Unable to set contact photo.') . EOL);
if (($relation == Contact::SHARING) && ($duplex)) {
$duplex = 0;
}
$r = q("UPDATE `contact` SET `rel` = %d,
`name-date` = '%s',
`uri-date` = '%s',
`blocked` = 0,
`pending` = 0,
`duplex` = %d,
`hidden` = %d,
`network` = '%s' WHERE `id` = %d
",
intval($new_relation),
DBA::escape(DateTimeFormat::utcNow()),
DBA::escape(DateTimeFormat::utcNow()),
intval($duplex),
intval($hidden),
DBA::escape(Protocol::DFRN),
intval($contact_id)
);
// reload contact info
$contact = DBA::selectFirst('contact', [], ['id' => $contact_id]);
if (isset($new_relation) && ($new_relation == Contact::FRIEND)) {
if (DBA::isResult($contact) && ($contact['network'] === Protocol::DIASPORA)) {
$ret = Diaspora::sendShare($user, $contact);
Logger::log('share returns: ' . $ret);
}
}
Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact['id']);
if (($protocol == Protocol::ACTIVITYPUB) && $duplex) {
ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $uid);
}
// Let's send our user to the contact editor in case they want to
// do anything special with this new friend.
if ($handsfree === null) {

9
mod/notifications.php
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@ -223,6 +223,14 @@ function notifications_content(App $a)
'$as_fan' => (($notif['network'] == Protocol::DIASPORA) ? L10n::t('Sharer') : L10n::t('Subscriber'))
]);
$contact = DBA::selectFirst('contact', ['network', 'protocol'], ['id' => $notif['contact_id']]);
if (($contact['network'] != Protocol::DFRN) || ($contact['protocol'] == Protocol::ACTIVITYPUB)) {
$action = 'follow_confirm';
} else {
$action = 'dfrn_confirm';
}
$header = $notif['name'];
if ($notif['addr'] != '') {
@ -270,6 +278,7 @@ function notifications_content(App $a)
'$note' => $notif['note'],
'$ignore' => L10n::t('Ignore'),
'$discard' => $discard,
'$action' => $action,
]);
break;
}

1
src/App/Router.php
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@ -124,6 +124,7 @@ class Router
});
$this->routeCollector->addRoute(['GET'], '/filer[/{id:\d+}]', Module\Filer\SaveTag::class);
$this->routeCollector->addRoute(['GET'], '/filerm/{id:\d+}', Module\Filer\RemoveTag::class);
$this->routeCollector->addRoute(['GET', 'POST'], '/follow_confirm', Module\FollowConfirm::class);
$this->routeCollector->addRoute(['GET'], '/followers/{owner}', Module\Followers::class);
$this->routeCollector->addRoute(['GET'], '/following/{owner}', Module\Following::class);
$this->routeCollector->addRoute(['GET'], '/friendica[/json]', Module\Friendica::class);

7
src/Model/Contact.php
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@ -125,13 +125,14 @@ class Contact extends BaseObject
}
/**
* @param integer $id
* @param integer $id Contact ID
* @param array $fields Array of selected fields, empty for all
* @return array|boolean Contact record if it exists, false otherwise
* @throws \Exception
*/
public static function getById($id)
public static function getById($id, $fields = [])
{
return DBA::selectFirst('contact', [], ['id' => $id]);
return DBA::selectFirst('contact', $fields, ['id' => $id]);
}
/**

97
src/Module/FollowConfirm.php Normal file
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@ -0,0 +1,97 @@
<?php
namespace Friendica\Module;
use Friendica\App;
use Friendica\BaseModule;
use Friendica\Core\L10n;
use Friendica\Core\Logger;
use Friendica\Core\Protocol;
use Friendica\Database\DBA;
use Friendica\Model\Contact;
use Friendica\Model\User;
use Friendica\Protocol\Diaspora;
use Friendica\Protocol\ActivityPub;
use Friendica\Util\DateTimeFormat;
/**
* Process follow request confirmations
*/
class FollowConfirm extends BaseModule
{
public static function post()
{
$a = self::getApp();
$uid = local_user();
if (!$uid) {
notice(L10n::t('Permission denied.') . EOL);
return;
}
$intro_id = intval(defaults($_POST, 'intro_id' , 0));
$duplex = intval(defaults($_POST, 'duplex' , 0));
$cid = intval(defaults($_POST, 'contact_id', 0));
$hidden = intval(defaults($_POST, 'hidden' , 0));
if (empty($cid)) {
notice(L10n::t('No given contact.') . EOL);
return;
}
Logger::info('Confirming follower', ['cid' => $cid]);
$contact = DBA::selectFirst('contact', [], ['id' => $cid, 'uid' => $uid]);
if (!DBA::isResult($contact)) {
Logger::warning('Contact not found in DB.', ['cid' => $cid]);
notice(L10n::t('Contact not found.') . EOL);
return;
}
$relation = $contact['rel'];
$new_relation = $contact['rel'];
$writable = $contact['writable'];
if (!empty($contact['protocol'])) {
$protocol = $contact['protocol'];
} else {
$protocol = $contact['network'];
}
if ($protocol == Protocol::ACTIVITYPUB) {
ActivityPub\Transmitter::sendContactAccept($contact['url'], $contact['hub-verify'], $uid);
}
if (in_array($protocol, [Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
if ($duplex) {
$new_relation = Contact::FRIEND;
} else {
$new_relation = Contact::FOLLOWER;
}
if ($new_relation != Contact::FOLLOWER) {
$writable = 1;
}
}
$fields = ['name-date' => DateTimeFormat::utcNow(),
'uri-date' => DateTimeFormat::utcNow(),
'blocked' => false, 'pending' => false, 'protocol' => $protocol,
'writable' => $writable, 'hidden' => $hidden, 'rel' => $new_relation];
DBA::update('contact', $fields, ['id' => $cid]);
if ($new_relation == Contact::FRIEND) {
if ($protocol == Protocol::DIASPORA) {
$user = User::getById($uid);
$contact = Contact::getById($cid);
$ret = Diaspora::sendShare($user, $contact);
Logger::info('share returns', ['return' => $ret]);
} elseif ($protocol == Protocol::ACTIVITYPUB) {
ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $uid);
}
}
DBA::delete('intro', ['id' => $intro_id]);
$a->internalRedirect('contact/' . intval($cid));
}
}

2
view/templates/intros.tpl
View File

@ -18,7 +18,7 @@
</form>
<div class="intro-form-end"></div>
<form class="intro-approve-form" action="dfrn_confirm" method="post">
<form class="intro-approve-form" action="{{$action}}" method="post">
{{include file="field_checkbox.tpl" field=$hidden}}
<input type="hidden" name="dfrn_id" value="{{$dfrn_id}}" >
<input type="hidden" name="intro_id" value="{{$intro_id}}" >

2
view/theme/frio/templates/intros.tpl
View File

@ -52,7 +52,7 @@
<div id="intro-approve-wrapper-{{$intro_id}}" style="display: none;">
<h3 class="heading">{{$fullname}}{{if $addr}}&nbsp;({{$addr}}){{/if}}</h3>
<form class="intro-approve-form" {{if $request}}action="{{$request}}" method="get"{{else}}action="dfrn_confirm" method="post"{{/if}}>
<form class="intro-approve-form" {{if $request}}action="{{$request}}" method="get"{{else}}action="{{$action}}" method="post"{{/if}}>
{{include file="field_checkbox.tpl" field=$hidden}}
{{if $type != "friend_suggestion"}}
<input type="hidden" name="dfrn_id" value="{{$dfrn_id}}" >