PHP使用bCrypt登录

Question

我正在尝试从SHA1切换到bCrypt以获取密码.注册正在运行,但我遇到登录问题.任何人都可以帮我吗？

这就是我所拥有的,它不起作用.

$SQLCheckLogin = $odb -> prepare("SELECT COUNT(*) FROM users WHERE username = :username AND password = :password"); 
$passwordverified = password_verify($password);
$SQLCheckLogin -> execute(array(':username' => $username, ':password' => $passwordverified));
$countLogin = $SQLCheckLogin -> fetchColumn(0);

password_verify函数

function password_verify($password, $hash) {
    if (!function_exists('crypt')) {
        trigger_error("Crypt must be loaded for password_verify to function", E_USER_WARNING);
        return false;
    }
    $ret = crypt($password, $hash);
    if (!is_string($ret) || strlen($ret) != strlen($hash) || strlen($ret) <= 13) {
        return false;
    }

    $status = 0;
    for ($i = 0; $i < strlen($ret); $i++) {
        $status |= (ord($ret[$i]) ^ ord($hash[$i]));
    }

    return $status === 0;
}

Answer 1

查看官方文档中的示例:password_verify.

该函数接受两个参数:

1. 用户提供(纯文本)密码
2. 来自数据库的哈希密码

这个流程是:

1. 根据用户名/ emailaddress /任何标识符从数据库中检索用户密码哈希
2. 使用验证密码 password_verify

所以你的代码应该是这样的:

$SQLCheckLogin = $odb -> prepare("SELECT password FROM users WHERE username = :username"); 
$SQLCheckLogin -> execute(array(':username' => $username));

$hash = $SQLCheckLogin->fetchColumn(0);

if ($hash === false || !password_verify($password, $hash)) {
    // you should handle this proper
    die('Failed login');
}

echo 'Logged in';

请注意,您还应该检查是否需要更新哈希.该password_*API与心中向前兼容性创建.这意味着当PHP中提供更好/更安全的散列算法时,您可以(并且应该)自动更新"旧"密码.

这个功能是password_needs_rehash检查密码是否需要更新:

$SQLCheckLogin = $odb -> prepare("SELECT password FROM users WHERE username = :username"); 
$SQLCheckLogin -> execute(array(':username' => $username));

$hash = $SQLCheckLogin->fetchColumn(0);

if ($hash === false || !password_verify($password, $hash)) {
    // you should handle this proper
    die('Failed login');
}

if (password_needs_rehash($hash, PASSWORD_DEFAULT, ['cost' => 14])) {
    $SQLUpdateLogin = $odb -> prepare("UPDATE users SET password = :password WHERE username = :username"); 
    $SQLUpdateLogin -> execute(array(
        ':username' => $username,
        ':password' => password_hash($password, PASSWORD_DEFAULT, ['cost' => 14]),
    ));
}

echo 'Logged in';