Validates authentication cookie.
Description
The checks include making sure that the authentication cookie is set and pulling in the contents (if $cookie is not used).
Makes sure the cookie is not expired. Verifies the hash in cookie is what is should be and compares the two.
Parameters
$cookie
stringoptional- If used, will validate contents instead of cookie’s.
Default:
''
$scheme
stringoptional- The cookie scheme to use:
'auth'
,'secure_auth'
, or'logged_in'
.Default:
''
Source
function wp_validate_auth_cookie( $cookie = '', $scheme = '' ) {
$cookie_elements = wp_parse_auth_cookie( $cookie, $scheme );
if ( ! $cookie_elements ) {
/**
* Fires if an authentication cookie is malformed.
*
* @since 2.7.0
*
* @param string $cookie Malformed auth cookie.
* @param string $scheme Authentication scheme. Values include 'auth', 'secure_auth',
* or 'logged_in'.
*/
do_action( 'auth_cookie_malformed', $cookie, $scheme );
return false;
}
$scheme = $cookie_elements['scheme'];
$username = $cookie_elements['username'];
$hmac = $cookie_elements['hmac'];
$token = $cookie_elements['token'];
$expired = $cookie_elements['expiration'];
$expiration = $cookie_elements['expiration'];
// Allow a grace period for POST and Ajax requests.
if ( wp_doing_ajax() || 'POST' === $_SERVER['REQUEST_METHOD'] ) {
$expired += HOUR_IN_SECONDS;
}
// Quick check to see if an honest cookie has expired.
if ( $expired < time() ) {
/**
* Fires once an authentication cookie has expired.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_expired', $cookie_elements );
return false;
}
$user = get_user_by( 'login', $username );
if ( ! $user ) {
/**
* Fires if a bad username is entered in the user authentication process.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_bad_username', $cookie_elements );
return false;
}
$pass_frag = substr( $user->user_pass, 8, 4 );
$key = wp_hash( $username . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );
// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
$algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
$hash = hash_hmac( $algo, $username . '|' . $expiration . '|' . $token, $key );
if ( ! hash_equals( $hash, $hmac ) ) {
/**
* Fires if a bad authentication cookie hash is encountered.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_bad_hash', $cookie_elements );
return false;
}
$manager = WP_Session_Tokens::get_instance( $user->ID );
if ( ! $manager->verify( $token ) ) {
/**
* Fires if a bad session token is encountered.
*
* @since 4.0.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_bad_session_token', $cookie_elements );
return false;
}
// Ajax/POST grace period set above.
if ( $expiration < time() ) {
$GLOBALS['login_grace_period'] = 1;
}
/**
* Fires once an authentication cookie has been validated.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
* @param WP_User $user User object.
*/
do_action( 'auth_cookie_valid', $cookie_elements, $user );
return $user->ID;
}
Hooks
- do_action( ‘auth_cookie_bad_hash’,
string[] $cookie_elements ) Fires if a bad authentication cookie hash is encountered.
- do_action( ‘auth_cookie_bad_session_token’,
string[] $cookie_elements ) Fires if a bad session token is encountered.
- do_action( ‘auth_cookie_bad_username’,
string[] $cookie_elements ) Fires if a bad username is entered in the user authentication process.
- do_action( ‘auth_cookie_expired’,
string[] $cookie_elements ) Fires once an authentication cookie has expired.
- do_action( ‘auth_cookie_malformed’,
string $cookie ,string $scheme ) Fires if an authentication cookie is malformed.
- do_action( ‘auth_cookie_valid’,
string[] $cookie_elements ,WP_User $user ) Fires once an authentication cookie has been validated.
Changelog
Version | Description |
---|---|
2.5.0 | Introduced. |
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