function printPacket($packet)
{
$str = "";
$str .= "Packet: ";
for ($i = 0; $i < strlen($packet); $i++) {
$str .= byte2hex(ord($packet[$i]));
if ($i % 2) {
$str .= "_";
}
}
$str .= "<br>\n";
return $str;
}
public function verifyM1computeM2($clientM1)
{
//M1 = H( H(N) xor H(g) , H (I) , s, A, B, K)
$hi = byte2hex($this->_srp->NgXorHash());
$hi .= $this->_srp->hash($this->_username);
$hi .= $this->_shex;
$hi .= str_pad($this->_Ahex, strlen($this->_srp->Nhex()), "0", STR_PAD_LEFT);
$hi .= str_pad($this->_Bhex, strlen($this->_srp->Nhex()), "0", STR_PAD_LEFT);
$hi .= $this->_Khex;
if (strlen($hi) % 2 == 1) {
$hi = $hi . '0';
}
$hi = pack("H*", $hi);
$hash_input = $this->_srp->NgXorHash();
$hash_input .= pack("H*", $this->_srp->hash($this->_username));
$hash_input .= pack("H*", $this->_shex);
$hash_input .= pack("H*", $this->_Ahex);
$hash_input .= pack("H*", $this->_Bhex);
$hash_input .= pack("H*", $this->_Khex);
$M1 = $this->_srp->hash($hi);
$this->_M1 = $M1;
if (strcmp($this->_M1, $clientM1) != 0) {
throw new Exception('AUTHENTICATION_FAILED');
}
// Login the user
$this->login($this->_username, $this->_userid);
//M2 = H(A, M, K)
$M2 = $this->_srp->hash(pack("H*", $this->_Ahex) . pack("H*", $M1) . pack("H*", $this->_Khex));
return $M2;
}