Fully end to end encrypted anonymous chat program. Server only stores public key lookup for users and the encrypted messages. No credentials are transfered to the server, but kept in local browser storage. This allows 100% safe chatting. https://safechat.ch
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<?php
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/*! @file
@id $Id$
@see @ref apipubkey
@page api
@section apipubkey Get Public Key
API-call pubkey.php
Get the public key of a user.
@param user Name of the user to ge public key from.
@return json encoded value:
- @c null in case of error (user does not exist)
- @code
{
pubkey: 'armored public key string'
}
@endcode
*/
// 1 2 3 4 5 6 7 8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890
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try {
require_once("usertable.php");
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$user = $db->real_escape_string($_REQUEST['user']);
$q = $db->query("select pubkey from user where name='$user';");
if ($q->num_rows!=1 && $user=="safechat") {
require_once("optionstable.php");
createSafechatUser();
$q = $db->query("select pubkey from user where name='$user';");
}
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if ($q->num_rows==1) {
echo json_encode($q->fetch_row()[0]);
} else {
echo json_encode(null);
}
} catch (Exception $e) {
echo json_encode(null);
}
?>