xref: /PHP-8.2/ext/sodium/tests/crypto_auth.phpt (revision 6c9a0566)
1--TEST--
2Check for libsodium auth
3--EXTENSIONS--
4sodium
5--FILE--
6<?php
7$msg = random_bytes(1000);
8$key = sodium_crypto_auth_keygen();
9$mac = sodium_crypto_auth($msg, $key);
10
11// This should validate
12var_dump(sodium_crypto_auth_verify($mac, $msg, $key));
13
14$bad_key = random_bytes(SODIUM_CRYPTO_AUTH_KEYBYTES - 1);
15try {
16    $mac = sodium_crypto_auth($msg, $bad_key);
17    echo 'Fail!', PHP_EOL;
18} catch (SodiumException $ex) {
19  echo $ex->getMessage(), PHP_EOL;
20}
21
22// Flip the first bit
23$badmsg = $msg;
24$badmsg[0] = \chr(\ord($badmsg[0]) ^ 0x80);
25var_dump(sodium_crypto_auth_verify($mac, $badmsg, $key));
26
27// Let's flip a bit pseudo-randomly
28$badmsg = $msg;
29$badmsg[$i=mt_rand(0, 999)] = \chr(
30    \ord($msg[$i]) ^ (
31        1 << mt_rand(0, 7)
32    )
33);
34
35var_dump(sodium_crypto_auth_verify($mac, $badmsg, $key));
36
37// Now let's change a bit in the MAC
38$badmac = $mac;
39$badmac[0] = \chr(\ord($badmac[0]) ^ 0x80);
40var_dump(sodium_crypto_auth_verify($badmac, $msg, $key));
41?>
42--EXPECT--
43bool(true)
44sodium_crypto_auth(): Argument #2 ($key) must be SODIUM_CRYPTO_AUTH_KEYBYTES bytes long
45bool(false)
46bool(false)
47bool(false)
48