Confirmation email with password_hash

Question

Confirmation email with password_hash

Asked 6 years, 4 months ago

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-1

When registering on the site, the user receives an email activation of the registration, until then all right. The problem is in checking the password_hash, I know you have password_verify, but in this case it seems that it is not possible to use it. The $key variable takes the encrypted user id using password_hash.

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Email de confirmação</title>
    </head>
    <body>
        <?php
        $key = filter_input(INPUT_GET, 'key', FILTER_SANITIZE_SPECIAL_CHARS);
        $verify = $conexao->prepare("select * from user where password_hash(id) = '$key'");
        $verify->execute();
        if($verify){
            $id = $verify->fetch(PDO::FETCH_OBJ);
            $confirm = $conexao->prepare("update user set confirm = 1 where id = :id");
            $confirm->bindValue(':id', $id->id, PDO::PARAM_INT);
            $confirm->execute();
            echo 'Cadastro ativado com sucesso!';
        }else{
            echo 'Erro ao ativar cadastro';
        }
        ?>
    </body>
</html>

As shown above, I tried to verify the user id in the database, thus:

$verify = $conexao->prepare("select * from user where password_hash(id) = '$key'");

And that way too:

$verify = $conexao->prepare("select * from user where password_hash(id, PASSWORD_DEFAULT) = '$key'");

But as expected gave error: 'Syntax error or access Violation: 1305 FUNCTION password_hash does not exist', vi que dá para fazer assim com o MD5. You can do something like this with password_hash?

1

The error is in your Query, password_hash is a PHP function, so it is giving the syntax error. Do the following, take the email to which the activation message was sent, from which you take the $id registered and uses the password_verify with the $key

– Leandro

2018/07/17 at 03:29
password_hash is a PHP function. It won’t work even within a query. Maybe this https://answall.com/a/147319/4751 will help you.

– gmsantos

2018/07/17 at 03:33
For it is Leandro, but if I do as MD5, so for example: $Verify = $connected->prepare("select * from user Where MD5(id) = '$key'"); Works normal. wanted to know if you have any function for password_hash to work inside a query, if not I do with MD5 even.

– Luizinho

2018/07/17 at 03:35

1 answer

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by Everton Neri • **680** points · Answer 1 · 2018-07-17T03:41:18+00:00

The error is in your Query. using MD5(id) works because mysql has this function implemented. You can do the following: encrypt the value of the user id and then compare the generated hash to the saved in the bank:

    $key = password_hash(filter_input(INPUT_GET, 'key', FILTER_SANITIZE_SPECIAL_CHARS));
    $verify = $conexao->prepare("select * from user where id = '$key'");
    $verify->execute();

OBS: this imagining that the value of GET "key" is not a hash in fact, because if it is, it is not necessary to generate again (because it would be different)