355 lines
8.6 KiB
PHP
355 lines
8.6 KiB
PHP
<?php
|
|
/**
|
|
* Class for creating an email provider.
|
|
*
|
|
* @package Two_Factor
|
|
*/
|
|
|
|
/**
|
|
* Class for creating an email provider.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @package Two_Factor
|
|
*/
|
|
class Two_Factor_Email extends Two_Factor_Provider {
|
|
|
|
/**
|
|
* The user meta token key.
|
|
*
|
|
* @var string
|
|
*/
|
|
const TOKEN_META_KEY = '_two_factor_email_token';
|
|
|
|
/**
|
|
* Store the timestamp when the token was generated.
|
|
*
|
|
* @var string
|
|
*/
|
|
const TOKEN_META_KEY_TIMESTAMP = '_two_factor_email_token_timestamp';
|
|
|
|
/**
|
|
* Name of the input field used for code resend.
|
|
*
|
|
* @var string
|
|
*/
|
|
const INPUT_NAME_RESEND_CODE = 'two-factor-email-code-resend';
|
|
|
|
/**
|
|
* Class constructor.
|
|
*
|
|
* @since 0.1-dev
|
|
*/
|
|
protected function __construct() {
|
|
add_action( 'two_factor_user_options_' . __CLASS__, array( $this, 'user_options' ) );
|
|
return parent::__construct();
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the provider.
|
|
*
|
|
* @since 0.1-dev
|
|
*/
|
|
public function get_label() {
|
|
return _x( 'Email', 'Provider Label', 'two-factor' );
|
|
}
|
|
|
|
/**
|
|
* Returns the "continue with" text provider for the login screen.
|
|
*
|
|
* @since 0.9.0
|
|
*/
|
|
public function get_alternative_provider_label() {
|
|
return __( 'Send a code to your email', 'two-factor' );
|
|
}
|
|
|
|
/**
|
|
* Generate the user token.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param int $user_id User ID.
|
|
* @return string
|
|
*/
|
|
public function generate_token( $user_id ) {
|
|
$token = $this->get_code();
|
|
|
|
update_user_meta( $user_id, self::TOKEN_META_KEY_TIMESTAMP, time() );
|
|
update_user_meta( $user_id, self::TOKEN_META_KEY, wp_hash( $token ) );
|
|
|
|
return $token;
|
|
}
|
|
|
|
/**
|
|
* Check if user has a valid token already.
|
|
*
|
|
* @param int $user_id User ID.
|
|
* @return boolean If user has a valid email token.
|
|
*/
|
|
public function user_has_token( $user_id ) {
|
|
$hashed_token = $this->get_user_token( $user_id );
|
|
|
|
if ( ! empty( $hashed_token ) ) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Has the user token validity timestamp expired.
|
|
*
|
|
* @param integer $user_id User ID.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function user_token_has_expired( $user_id ) {
|
|
$token_lifetime = $this->user_token_lifetime( $user_id );
|
|
$token_ttl = $this->user_token_ttl( $user_id );
|
|
|
|
// Invalid token lifetime is considered an expired token.
|
|
if ( is_int( $token_lifetime ) && $token_lifetime <= $token_ttl ) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Get the lifetime of a user token in seconds.
|
|
*
|
|
* @param integer $user_id User ID.
|
|
*
|
|
* @return integer|null Return `null` if the lifetime can't be measured.
|
|
*/
|
|
public function user_token_lifetime( $user_id ) {
|
|
$timestamp = intval( get_user_meta( $user_id, self::TOKEN_META_KEY_TIMESTAMP, true ) );
|
|
|
|
if ( ! empty( $timestamp ) ) {
|
|
return time() - $timestamp;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Return the token time-to-live for a user.
|
|
*
|
|
* @param integer $user_id User ID.
|
|
*
|
|
* @return integer
|
|
*/
|
|
public function user_token_ttl( $user_id ) {
|
|
$token_ttl = 15 * MINUTE_IN_SECONDS;
|
|
|
|
/**
|
|
* Number of seconds the token is considered valid
|
|
* after the generation.
|
|
*
|
|
* @param integer $token_ttl Token time-to-live in seconds.
|
|
* @param integer $user_id User ID.
|
|
*/
|
|
return (int) apply_filters( 'two_factor_token_ttl', $token_ttl, $user_id );
|
|
}
|
|
|
|
/**
|
|
* Get the authentication token for the user.
|
|
*
|
|
* @param int $user_id User ID.
|
|
*
|
|
* @return string|boolean User token or `false` if no token found.
|
|
*/
|
|
public function get_user_token( $user_id ) {
|
|
$hashed_token = get_user_meta( $user_id, self::TOKEN_META_KEY, true );
|
|
|
|
if ( ! empty( $hashed_token ) && is_string( $hashed_token ) ) {
|
|
return $hashed_token;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Validate the user token.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param int $user_id User ID.
|
|
* @param string $token User token.
|
|
* @return boolean
|
|
*/
|
|
public function validate_token( $user_id, $token ) {
|
|
$hashed_token = $this->get_user_token( $user_id );
|
|
|
|
// Bail if token is empty or it doesn't match.
|
|
if ( empty( $hashed_token ) || ! hash_equals( wp_hash( $token ), $hashed_token ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( $this->user_token_has_expired( $user_id ) ) {
|
|
return false;
|
|
}
|
|
|
|
// Ensure the token can be used only once.
|
|
$this->delete_token( $user_id );
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Delete the user token.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param int $user_id User ID.
|
|
*/
|
|
public function delete_token( $user_id ) {
|
|
delete_user_meta( $user_id, self::TOKEN_META_KEY );
|
|
}
|
|
|
|
/**
|
|
* Generate and email the user token.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
* @return bool Whether the email contents were sent successfully.
|
|
*/
|
|
public function generate_and_email_token( $user ) {
|
|
$token = $this->generate_token( $user->ID );
|
|
|
|
/* translators: %s: site name */
|
|
$subject = wp_strip_all_tags( sprintf( __( 'Your login confirmation code for %s', 'two-factor' ), wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ) ) );
|
|
/* translators: %s: token */
|
|
$message = wp_strip_all_tags( sprintf( __( 'Enter %s to log in.', 'two-factor' ), $token ) );
|
|
|
|
/**
|
|
* Filter the token email subject.
|
|
*
|
|
* @param string $subject The email subject line.
|
|
* @param int $user_id The ID of the user.
|
|
*/
|
|
$subject = apply_filters( 'two_factor_token_email_subject', $subject, $user->ID );
|
|
|
|
/**
|
|
* Filter the token email message.
|
|
*
|
|
* @param string $message The email message.
|
|
* @param string $token The token.
|
|
* @param int $user_id The ID of the user.
|
|
*/
|
|
$message = apply_filters( 'two_factor_token_email_message', $message, $token, $user->ID );
|
|
|
|
return wp_mail( $user->user_email, $subject, $message ); // phpcs:ignore WordPressVIPMinimum.Functions.RestrictedFunctions.wp_mail_wp_mail
|
|
}
|
|
|
|
/**
|
|
* Prints the form that prompts the user to authenticate.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
*/
|
|
public function authentication_page( $user ) {
|
|
if ( ! $user ) {
|
|
return;
|
|
}
|
|
|
|
if ( ! $this->user_has_token( $user->ID ) || $this->user_token_has_expired( $user->ID ) ) {
|
|
$this->generate_and_email_token( $user );
|
|
}
|
|
|
|
require_once ABSPATH . '/wp-admin/includes/template.php';
|
|
?>
|
|
<p class="two-factor-prompt"><?php esc_html_e( 'A verification code has been sent to the email address associated with your account.', 'two-factor' ); ?></p>
|
|
<p>
|
|
<label for="authcode"><?php esc_html_e( 'Verification Code:', 'two-factor' ); ?></label>
|
|
<input type="text" inputmode="numeric" name="two-factor-email-code" id="authcode" class="input authcode" value="" size="20" pattern="[0-9 ]*" placeholder="1234 5678" data-digits="8" />
|
|
<?php submit_button( __( 'Log In', 'two-factor' ) ); ?>
|
|
</p>
|
|
<p class="two-factor-email-resend">
|
|
<input type="submit" class="button" name="<?php echo esc_attr( self::INPUT_NAME_RESEND_CODE ); ?>" value="<?php esc_attr_e( 'Resend Code', 'two-factor' ); ?>" />
|
|
</p>
|
|
<script type="text/javascript">
|
|
setTimeout( function(){
|
|
var d;
|
|
try{
|
|
d = document.getElementById('authcode');
|
|
d.value = '';
|
|
d.focus();
|
|
} catch(e){}
|
|
}, 200);
|
|
</script>
|
|
<?php
|
|
}
|
|
|
|
/**
|
|
* Send the email code if missing or requested. Stop the authentication
|
|
* validation if a new token has been generated and sent.
|
|
*
|
|
* @param WP_USer $user WP_User object of the logged-in user.
|
|
* @return boolean
|
|
*/
|
|
public function pre_process_authentication( $user ) {
|
|
if ( isset( $user->ID ) && isset( $_REQUEST[ self::INPUT_NAME_RESEND_CODE ] ) ) {
|
|
$this->generate_and_email_token( $user );
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Validates the users input token.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
* @return boolean
|
|
*/
|
|
public function validate_authentication( $user ) {
|
|
$code = $this->sanitize_code_from_request( 'two-factor-email-code' );
|
|
if ( ! isset( $user->ID ) || ! $code ) {
|
|
return false;
|
|
}
|
|
|
|
return $this->validate_token( $user->ID, $code );
|
|
}
|
|
|
|
/**
|
|
* Whether this Two Factor provider is configured and available for the user specified.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
* @return boolean
|
|
*/
|
|
public function is_available_for_user( $user ) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Inserts markup at the end of the user profile field for this provider.
|
|
*
|
|
* @since 0.1-dev
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
*/
|
|
public function user_options( $user ) {
|
|
$email = $user->user_email;
|
|
?>
|
|
<div>
|
|
<?php
|
|
echo esc_html(
|
|
sprintf(
|
|
/* translators: %s: email address */
|
|
__( 'Authentication codes will be sent to %s.', 'two-factor' ),
|
|
$email
|
|
)
|
|
);
|
|
?>
|
|
</div>
|
|
<?php
|
|
}
|
|
}
|