SRP PHP Client

PHP Client for Login over Secure Remote Password Protocol

1. registrate

generate s (salt) and v (verifier). generated by client, stored by server


            $username = "falk";

            $password = "test123";

            $s = $srp->getRandomSeed();

            $x = $srp->generateX($s, $username, $password);

            $v = $srp->generateV($x);

            $send = array("phase" => 0, "I" => $username, "v" => $v, "s" => $s);

Send

Array ( [phase] => 0 [I] => falk [v] => d23f4b49e85ba887b92cde2d568165a41742d5b56f1078bd0849af1aa6ab975cba4a7278d5247793b1e7d844c8637922ce899f0b4d21c036ad9cbaa25ea8fd59 [s] => 416393a435f4388813487af23aab5eda43b852927037ecc356f70e3e518384ac6345017e47bc976467b20e5759e93f231ef4633e284ca7ce2f7f2f8f103542a5 )

Recive

Array ( [success] => 1 )

2. Login - Phase 1

client generate a (private random key), A (public generated key) and send A, I (username) to server.


            $a = $srp->getRandomSeed();

            $A = $srp->generateA($a);

            $send = array("phase" => 1, "I" => $username, "A" => $A);

Send

Array ( [phase] => 1 [I] => falk [A] => ca00c4045f4591bb4c27b19d79597803629d79ea3498875b8da7853316bec19ea9271a385513a8362bb06492500137918db84f4ddde9708fd2251a666c29bf95 )

Recive

Array ( [success] => )

3. Login - Phase 2

Client receive s (salt) und B (public key of Server) in Phase 1. Client build M1 and send it sto Server.

Notice: Undefined index: B in /html/code.falk-m.de/srp/client.php on line 128

Notice: Undefined index: s in /html/code.falk-m.de/srp/client.php on line 129


            $B = $res1["B"];

            $s = $res1["s"];

            $x = $srp->generateX($s, $username, $password);

            $S = $srp->generateS_Client($A, $B, $a, $x);

            $M1 = $srp->generateM1($A, $B, $S);

            $send = array("phase" => 2, "M1" => $M1);

Send

Array ( [phase] => 2 [M1] => c506df83fd951ab69e2807c2e28c428a5e346b03cf5f3129ec3d07e3c01b1331 )

Recive

4. Server verification

Client receive M2 from Server, rebiuld and compare them and build session key


            $res2 = json_decode($res["body"], true);

            $M2 = $res2["M2"];

            $M2_check = $srp->generateM2($A, $M1, $S);

            

            if($M2 == $M2_check){

                echo "SUCCESS;";

                $K = $srp->generateK($S);

                echo "SESSION KEY: ".$K;

            }

Output

Notice: Trying to access array offset on value of type null in /html/code.falk-m.de/srp/client.php on line 180