Check the password of a user

Question

Check the password of a user

Ashfame

2022年5月27日 23:34

I want to keep a check if the user has a particular password, so I have been trying it with wp_check_password but the account for which it is checked gets logged out and can't login again till there is a call of wp_check_password in the code.

Digging into the code, I found out that it sets the password by using the new hash. and moreover if I am using wp_check_password( 'hello', md5('hello'), 1 );, it doesn't even check what is inside the database and returns true. Isn't that a bug?

Any ideas how can I check the user's password?

Topic password Wordpress

Category Web

Saud Alfadhli · Accepted Answer · 2022年5月27日 23:34

require_once ABSPATH . WPINC . '/class-phpass.php';
$wp_hasher = new PasswordHash(8, TRUE);

$password_hashed = '$P$BB3pP6fQAYa61ael0LNQlpB1NOyqNY0';
$plain_password = 'admin2';
if($wp_hasher->CheckPassword($plain_password, $password_hashed)) {
    print 'Password matched.';
}

Credits to: https://stackoverflow.com/a/37181662

Rarst · Accepted Answer · 2011年3月30日 21:05

~~Your example works correctly. You are checking if password hello matches hashed hello - which it naturally does.~~

Hadn't thought it through. Your example causes following issue:

You check if hello matches md5 of hello (instead of hash from user's profile).
It does and then WP thinks this is correct, but outdated md5 hash - that must be updated.
It re-hashes hello and updates user with it, locking him out (since his password is now hello instead of whatever it was before).

See wp_authenticate_username_password() function for extensive example, but basic idea is:

$userdata = get_user_by('login', $username);
$result = wp_check_password($password, $userdata->user_pass, $userdata->ID);

goldenapples · Accepted Answer · 2011年3月30日 20:18

You can grab their hashed password from the database, and compare it to the entry you want to check using wp_hash_password().

To check if the current user's password matches "hello", try this:

if ( $current_user->user_pass == wp_hash_password( 'hello' ) )

Check the password of a user

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