public static function verifyAuth($auth)
{
$array = explode(".", $auth);
if (count($array) != 3) {
return false;
}
$token = $array[0];
$time = $array[1];
$sign = $array[2];
$c = new \sodium\crypto();
$mysec = $c->keypair();
$mysec->load("d9e51b64202a4e5d45ae44aad312b2c800771d09f8335b8da664c9d8cc724345", "858f393c6446da67e5c3913ec66a8de3c9293f76c0d63d432e6852102eb9418d", true);
$nonce = new \sodium\nonce();
$client_public = new \sodium\public_key();
$client_public->load("65a248a7e527d576d44b918cb3ae02303c9a206bfc2ec56cc135bb9e659e757c", true);
$sign = $c->box_open(hex2bin($sign), $nonce->set_nonce(hex2bin('565870a7000bd8466f83d97a04333245000067dd443bbb4b'), false), $client_public, $mysec);
$signArray = explode(":", $sign);
if (count($signArray) != 2) {
return false;
}
if ($token != $signArray[0]) {
return false;
}
if ($time != $signArray[1]) {
return false;
}
return $token;
}
<?php
/*
* php-sodium uses namespace sodium.
* crypto() and nonce() methods throw \sodium\crypto_exception
*/
try {
$c = new \sodium\crypto();
// Create a secret key
$alice_secret = $c->keypair();
// Create public key
$alice_public = new \sodium\public_key();
// Load binary key from alice_secret (pbin), false: expect binary, not key in hex
$alice_public->load($alice_secret->pbin, false);
// Alice's friend Bob
$bob_secret = $c->keypair();
// Create public key from bob_secret (pbin)
$bob_public = new \sodium\public_key();
$bob_public->load($bob_secret->pbin, false);
// Alice's message to Bob
$message = "Now Jesus did many other signs in the presence of the disciples,";
$message .= "which are not written in this book; but these are written so that";
$message .= "you may believe that Jesus is the Christ, the Son of God, and that";
$message .= "by believing you may have life in his name. (ESV, John 20:30:31)";
// Create a nonce
$nonce = new \sodium\nonce();
// Every call to $nonce->next() generates a new nonce! Important for crypto_box
// Use Bob's public key to send to Bob
$encrypted_text = $c->box($message, $nonce->next(), $bob_public, $alice_secret);
// Bob receives the $encrypted_text and 24 bytes nonce->nbin from Alice via the network
$nonce_from_alice = $nonce->nbin;