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
/*! @file
@id $Id$
@see @ref apilogin
@page api
@section apilogin Login
API-call login.php
Check if a user is consistent to the data in the server's database
or create a user, if he does not yet exist in the @ref usertable
(and the user name is available).
@param user user's name
@param pubkey user's public key
@return json encoded status with text:
- success() in case of success (user exists or has been created)
- error() in case of mismatch
*/
// 1 2 3 4 5 6 7 8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890
try {
require_once("usertable.php");
$user = $db->real_escape_string($_REQUEST['user']);
$pubkey = $db->real_escape_string($_REQUEST['pubkey']);
$pgp = gnupg_init();
if (!$pgp) error("pgp on server failed");
$verify = gnupg_import($pgp, $_REQUEST['pubkey']);
if (!$verify) error("wrong identity");
$q = $db->query("select * from user where name='$user' and pubkey='$pubkey';");
if ($q->num_rows==1) {
success("user verified");
} elseif ($q->num_rows==0) {
$q = $db->query("insert into user (name, pubkey) values ('$user', '$pubkey');");
if (!q) error("creation of user failed");
success("user created");
} else {
error("server database defect");
}
} catch (Exception $e) {
error("login failed");
}
?>