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<?php
class Crypto
{
/**
* Hash given string using crypt's $6$,
* which translates to ~130 bit salt
* and 5000 rounds of hashing with SHA-512.
*/
public static function hash6(string $password): string
{
$salt = substr(str_replace('+', '.', base64_encode(pack('N4', mt_rand(), mt_rand(), mt_rand(), mt_rand()))), 0, 16);
$hash = crypt($password, '$6$' . $salt);
if (strlen($hash) < 60) Util::traceError('Error hashing password using SHA-512');
return $hash;
}
/**
* Check if the given password matches the given crypt hash.
* Useful for checking a hashed password.
*/
public static function verify(string $password, string $hash): bool
{
return crypt($password, $hash) === $hash;
}
}
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