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] => c87188f613b405cad9cb1a4f6bf3a07cfba1150fb6fe1b80ae3c53e7f5166fe480893dc2fa7be7e20ef27f5e05efa63b3d32d259ff0fd4b5bec66b90e8c42bda [s] => 40b4386f1fe2269d283ef850120dcfc32d4d9633721506a1f29b9c559b9c9f23e12c1aa457b3846629d52ff398bc11a6a74330745ac82d917d97ff6c1cc42155 )

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] => b7d06358c726ffb35ff821606d041f9325172441d5a8305bc4ff895a619059d91ed32088528ce8de92daef9ea81714c2a4dcc7c3940955db3a1e287636f6181d )

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.

Warning: Undefined array key "B" in /html/code.falk-m.de/srp/client.php on line 128

Warning: Undefined array key "s" in /html/code.falk-m.de/srp/client.php on line 129

Deprecated: strtolower(): Passing null to parameter #1 ($string) of type string is deprecated in /html/code.falk-m.de/srp/php/lib/srp.php on line 222

Deprecated: strtolower(): Passing null to parameter #1 ($string) of type string is deprecated in /html/code.falk-m.de/srp/php/lib/srp.php on line 222


            $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] => 8d6d779a54cc4694fdd1576ff055f2ea65e6dde3495eda9eee22ca230aa25d8d )

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

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