771 lines
22 KiB
PHP
771 lines
22 KiB
PHP
<?php
|
|
/**
|
|
* Class for creating a Time Based One-Time Password provider.
|
|
*
|
|
* @package Two_Factor
|
|
*/
|
|
|
|
/**
|
|
* Class Two_Factor_Totp
|
|
*/
|
|
class Two_Factor_Totp extends Two_Factor_Provider {
|
|
|
|
/**
|
|
* The user meta key for the TOTP Secret key.
|
|
*
|
|
* @var string
|
|
*/
|
|
const SECRET_META_KEY = '_two_factor_totp_key';
|
|
|
|
/**
|
|
* The user meta key for the last successful TOTP token timestamp logged in with.
|
|
*
|
|
* @var string
|
|
*/
|
|
const LAST_SUCCESSFUL_LOGIN_META_KEY = '_two_factor_totp_last_successful_login';
|
|
|
|
const DEFAULT_KEY_BIT_SIZE = 160;
|
|
const DEFAULT_CRYPTO = 'sha1';
|
|
const DEFAULT_DIGIT_COUNT = 6;
|
|
const DEFAULT_TIME_STEP_SEC = 30;
|
|
const DEFAULT_TIME_STEP_ALLOWANCE = 4;
|
|
|
|
/**
|
|
* Characters used in base32 encoding.
|
|
*
|
|
* @var string
|
|
*/
|
|
private static $base_32_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';
|
|
|
|
/**
|
|
* Ensures only one instance of this class exists in memory at any one time.
|
|
*
|
|
* @codeCoverageIgnore
|
|
*/
|
|
public static function get_instance() {
|
|
static $instance;
|
|
if ( ! isset( $instance ) ) {
|
|
$instance = new self();
|
|
}
|
|
return $instance;
|
|
}
|
|
|
|
/**
|
|
* Class constructor. Sets up hooks, etc.
|
|
*
|
|
* @codeCoverageIgnore
|
|
*/
|
|
protected function __construct() {
|
|
add_action( 'rest_api_init', array( $this, 'register_rest_routes' ) );
|
|
add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) );
|
|
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_assets' ) );
|
|
add_action( 'two_factor_user_options_' . __CLASS__, array( $this, 'user_two_factor_options' ) );
|
|
|
|
return parent::__construct();
|
|
}
|
|
|
|
/**
|
|
* Register the rest-api endpoints required for this provider.
|
|
*
|
|
* @codeCoverageIgnore
|
|
*/
|
|
public function register_rest_routes() {
|
|
register_rest_route(
|
|
Two_Factor_Core::REST_NAMESPACE,
|
|
'/totp',
|
|
array(
|
|
array(
|
|
'methods' => WP_REST_Server::DELETABLE,
|
|
'callback' => array( $this, 'rest_delete_totp' ),
|
|
'permission_callback' => function( $request ) {
|
|
return current_user_can( 'edit_user', $request['user_id'] );
|
|
},
|
|
'args' => array(
|
|
'user_id' => array(
|
|
'required' => true,
|
|
'type' => 'integer',
|
|
),
|
|
),
|
|
),
|
|
array(
|
|
'methods' => WP_REST_Server::CREATABLE,
|
|
'callback' => array( $this, 'rest_setup_totp' ),
|
|
'permission_callback' => function( $request ) {
|
|
return current_user_can( 'edit_user', $request['user_id'] );
|
|
},
|
|
'args' => array(
|
|
'user_id' => array(
|
|
'required' => true,
|
|
'type' => 'integer',
|
|
),
|
|
'key' => array(
|
|
'type' => 'string',
|
|
'default' => '',
|
|
'validate_callback' => null, // Note: validation handled in ::rest_setup_totp().
|
|
),
|
|
'code' => array(
|
|
'type' => 'string',
|
|
'default' => '',
|
|
'validate_callback' => null, // Note: validation handled in ::rest_setup_totp().
|
|
),
|
|
'enable_provider' => array(
|
|
'required' => false,
|
|
'type' => 'boolean',
|
|
'default' => false,
|
|
),
|
|
),
|
|
),
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the provider.
|
|
*/
|
|
public function get_label() {
|
|
return _x( 'Time Based One-Time Password (TOTP)', 'Provider Label', 'two-factor' );
|
|
}
|
|
|
|
/**
|
|
* Enqueue scripts
|
|
*
|
|
* @codeCoverageIgnore
|
|
*/
|
|
public function enqueue_assets( $hook_suffix ) {
|
|
$environment_prefix = file_exists( TWO_FACTOR_DIR . '/dist' ) ? '/dist' : '';
|
|
|
|
wp_register_script(
|
|
'two-factor-qr-code-generator',
|
|
plugins_url( $environment_prefix . '/includes/qrcode-generator/qrcode.js', __DIR__ ),
|
|
array(),
|
|
TWO_FACTOR_VERSION,
|
|
true
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Rest API endpoint for handling deactivation of TOTP.
|
|
*
|
|
* @param WP_Rest_Request $request The Rest Request object.
|
|
* @return array Success array.
|
|
*/
|
|
public function rest_delete_totp( $request ) {
|
|
$user_id = $request['user_id'];
|
|
$user = get_user_by( 'id', $user_id );
|
|
|
|
$this->delete_user_totp_key( $user_id );
|
|
|
|
ob_start();
|
|
$this->user_two_factor_options( $user );
|
|
$html = ob_get_clean();
|
|
|
|
return [
|
|
'success' => true,
|
|
'html' => $html,
|
|
];
|
|
}
|
|
|
|
/**
|
|
* REST API endpoint for setting up TOTP.
|
|
*
|
|
* @param WP_Rest_Request $request The Rest Request object.
|
|
* @return WP_Error|array Array of data on success, WP_Error on error.
|
|
*/
|
|
public function rest_setup_totp( $request ) {
|
|
$user_id = $request['user_id'];
|
|
$user = get_user_by( 'id', $user_id );
|
|
|
|
$key = $request['key'];
|
|
$code = preg_replace( '/\s+/', '', $request['code'] );
|
|
|
|
if ( ! $this->is_valid_key( $key ) ) {
|
|
return new WP_Error( 'invalid_key', __( 'Invalid Two Factor Authentication secret key.', 'two-factor' ), array( 'status' => 400 ) );
|
|
}
|
|
|
|
if ( ! $this->is_valid_authcode( $key, $code ) ) {
|
|
return new WP_Error( 'invalid_key_code', __( 'Invalid Two Factor Authentication code.', 'two-factor' ), array( 'status' => 400 ) );
|
|
}
|
|
|
|
if ( ! $this->set_user_totp_key( $user_id, $key ) ) {
|
|
return new WP_Error( 'db_error', __( 'Unable to save Two Factor Authentication code. Please re-scan the QR code and enter the code provided by your application.', 'two-factor' ), array( 'status' => 500 ) );
|
|
}
|
|
|
|
if ( $request->get_param( 'enable_provider' ) && ! Two_Factor_Core::enable_provider_for_user( $user_id, 'Two_Factor_Totp' ) ) {
|
|
return new WP_Error( 'db_error', __( 'Unable to enable TOTP provider for this user.', 'two-factor' ), array( 'status' => 500 ) );
|
|
}
|
|
|
|
ob_start();
|
|
$this->user_two_factor_options( $user );
|
|
$html = ob_get_clean();
|
|
|
|
return [
|
|
'success' => true,
|
|
'html' => $html,
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Generates a URL that can be used to create a QR code.
|
|
*
|
|
* @param WP_User $user The user to generate a URL for.
|
|
* @param string $key The secret key.
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function generate_qr_code_url( $user, $secret_key ) {
|
|
$issuer = get_bloginfo( 'name', 'display' );
|
|
|
|
/**
|
|
* Filter the Issuer for the TOTP.
|
|
*
|
|
* Must follow the TOTP format for a "issuer". Do not URL Encode.
|
|
*
|
|
* @see https://github.com/google/google-authenticator/wiki/Key-Uri-Format#issuer
|
|
* @param string $issuer The issuer for TOTP.
|
|
*/
|
|
$issuer = apply_filters( 'two_factor_totp_issuer', $issuer );
|
|
|
|
/**
|
|
* Filter the Label for the TOTP.
|
|
*
|
|
* Must follow the TOTP format for a "label". Do not URL Encode.
|
|
*
|
|
* @see https://github.com/google/google-authenticator/wiki/Key-Uri-Format#label
|
|
* @param string $totp_title The label for the TOTP.
|
|
* @param WP_User $user The User object.
|
|
* @param string $issuer The issuer of the TOTP. This should be the prefix of the result.
|
|
*/
|
|
$totp_title = apply_filters( 'two_factor_totp_title', $issuer . ':' . $user->user_login, $user, $issuer );
|
|
|
|
$totp_url = add_query_arg(
|
|
array(
|
|
'secret' => rawurlencode( $secret_key ),
|
|
'issuer' => rawurlencode( $issuer ),
|
|
),
|
|
'otpauth://totp/' . rawurlencode( $totp_title )
|
|
);
|
|
|
|
/**
|
|
* Filter the TOTP generated URL.
|
|
*
|
|
* Must follow the TOTP format. Do not URL Encode.
|
|
*
|
|
* @see https://github.com/google/google-authenticator/wiki/Key-Uri-Format
|
|
* @param string $totp_url The TOTP URL.
|
|
* @param WP_User $user The user object.
|
|
*/
|
|
$totp_url = apply_filters( 'two_factor_totp_url', $totp_url, $user );
|
|
$totp_url = esc_url( $totp_url, array( 'otpauth' ) );
|
|
|
|
return $totp_url;
|
|
}
|
|
|
|
/**
|
|
* Display TOTP options on the user settings page.
|
|
*
|
|
* @param WP_User $user The current user being edited.
|
|
* @return false
|
|
*
|
|
* @codeCoverageIgnore
|
|
*/
|
|
public function user_two_factor_options( $user ) {
|
|
if ( ! isset( $user->ID ) ) {
|
|
return false;
|
|
}
|
|
|
|
$key = $this->get_user_totp_key( $user->ID );
|
|
|
|
wp_enqueue_script( 'two-factor-qr-code-generator' );
|
|
wp_enqueue_script( 'wp-api-request' );
|
|
wp_enqueue_script( 'jquery' );
|
|
|
|
?>
|
|
<div id="two-factor-totp-options">
|
|
<?php
|
|
if ( empty( $key ) ) :
|
|
|
|
$key = $this->generate_key();
|
|
$totp_url = $this->generate_qr_code_url( $user, $key );
|
|
|
|
?>
|
|
|
|
<p>
|
|
<?php esc_html_e( 'Please scan the QR code or manually enter the key, then enter an authentication code from your app in order to complete setup.', 'two-factor' ); ?>
|
|
</p>
|
|
<p id="two-factor-qr-code">
|
|
<a href="<?php echo $totp_url; ?>">
|
|
Loading...
|
|
<img src="<?php echo esc_url( admin_url( 'images/spinner.gif' ) ); ?>" alt="" />
|
|
</a>
|
|
</p>
|
|
|
|
<style>
|
|
#two-factor-qr-code {
|
|
/* The size of the image will change based on the length of the URL inside it. */
|
|
min-width: 205px;
|
|
min-height: 205px;
|
|
}
|
|
</style>
|
|
|
|
<script>
|
|
(function(){
|
|
var qr_generator = function() {
|
|
/*
|
|
* 0 = Automatically select the version, to avoid going over the limit of URL
|
|
* length.
|
|
* L = Least amount of error correction, because it's not needed when scanning
|
|
* on a monitor, and it lowers the image size.
|
|
*/
|
|
var qr = qrcode( 0, 'L' );
|
|
|
|
qr.addData( <?php echo wp_json_encode( $totp_url ); ?> );
|
|
qr.make();
|
|
|
|
document.querySelector( '#two-factor-qr-code a' ).innerHTML = qr.createSvgTag( 5 );
|
|
};
|
|
|
|
// Run now if the document is loaded, otherwise on DOMContentLoaded.
|
|
if ( document.readyState === 'complete' ) {
|
|
qr_generator();
|
|
} else {
|
|
window.addEventListener( 'DOMContentLoaded', qr_generator );
|
|
}
|
|
})();
|
|
</script>
|
|
|
|
<p>
|
|
<code><?php echo esc_html( $key ); ?></code>
|
|
</p>
|
|
<p>
|
|
<input type="hidden" id="two-factor-totp-key" name="two-factor-totp-key" value="<?php echo esc_attr( $key ); ?>" />
|
|
<label for="two-factor-totp-authcode">
|
|
<?php esc_html_e( 'Authentication Code:', 'two-factor' ); ?>
|
|
<?php
|
|
/* translators: Example auth code. */
|
|
$placeholder = sprintf( __( 'eg. %s', 'two-factor' ), '123456' );
|
|
?>
|
|
<input type="tel" name="two-factor-totp-authcode" id="two-factor-totp-authcode" class="input" value="" size="20" pattern="[0-9 ]*" placeholder="<?php echo esc_attr( $placeholder ); ?>" />
|
|
</label>
|
|
<input type="submit" class="button totp-submit" name="two-factor-totp-submit" value="<?php esc_attr_e( 'Submit', 'two-factor' ); ?>" />
|
|
</p>
|
|
|
|
<script>
|
|
(function($){
|
|
$('.totp-submit').click( function( e ) {
|
|
e.preventDefault();
|
|
var key = $('#two-factor-totp-key').val(),
|
|
code = $('#two-factor-totp-authcode').val();
|
|
|
|
wp.apiRequest( {
|
|
method: 'POST',
|
|
path: <?php echo wp_json_encode( Two_Factor_Core::REST_NAMESPACE . '/totp' ); ?>,
|
|
data: {
|
|
user_id: <?php echo wp_json_encode( $user->ID ); ?>,
|
|
key: key,
|
|
code: code,
|
|
}
|
|
} ).fail( function( response, status ) {
|
|
var errorMessage = response.responseJSON.message || status,
|
|
$error = $( '#totp-setup-error' );
|
|
|
|
if ( ! $error.length ) {
|
|
$error = $('<div class="error" id="totp-setup-error"><p></p></div>').insertAfter( $('.totp-submit') );
|
|
}
|
|
|
|
$error.find('p').text( errorMessage );
|
|
|
|
$('#two-factor-totp-authcode').val('');
|
|
} ).then( function( response ) {
|
|
$( '#two-factor-totp-options' ).html( response.html );
|
|
} );
|
|
} );
|
|
})(jQuery);
|
|
</script>
|
|
|
|
<?php else : ?>
|
|
<p class="success">
|
|
<?php esc_html_e( 'Secret key is configured and registered. It is not possible to view it again for security reasons.', 'two-factor' ); ?>
|
|
</p>
|
|
<p>
|
|
<a class="button reset-totp-key" href="#"><?php esc_html_e( 'Reset Key', 'two-factor' ); ?></a>
|
|
<em class="description">
|
|
<?php esc_html_e( 'You will have to re-scan the QR code on all devices as the previous codes will stop working.', 'two-factor' ); ?>
|
|
</em>
|
|
<script>
|
|
( function( $ ) {
|
|
$( 'a.reset-totp-key' ).click( function( e ) {
|
|
e.preventDefault();
|
|
|
|
wp.apiRequest( {
|
|
method: 'DELETE',
|
|
path: <?php echo wp_json_encode( Two_Factor_Core::REST_NAMESPACE . '/totp' ); ?>,
|
|
data: {
|
|
user_id: <?php echo wp_json_encode( $user->ID ); ?>,
|
|
}
|
|
} ).then( function( response ) {
|
|
$( '#two-factor-totp-options' ).html( response.html );
|
|
} );
|
|
} );
|
|
} )( jQuery );
|
|
</script>
|
|
</p>
|
|
<?php endif; ?>
|
|
</div>
|
|
<?php
|
|
}
|
|
|
|
/**
|
|
* Get the TOTP secret key for a user.
|
|
*
|
|
* @param int $user_id User ID.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function get_user_totp_key( $user_id ) {
|
|
return (string) get_user_meta( $user_id, self::SECRET_META_KEY, true );
|
|
}
|
|
|
|
/**
|
|
* Set the TOTP secret key for a user.
|
|
*
|
|
* @param int $user_id User ID.
|
|
* @param string $key TOTP secret key.
|
|
*
|
|
* @return boolean If the key was stored successfully.
|
|
*/
|
|
public function set_user_totp_key( $user_id, $key ) {
|
|
return update_user_meta( $user_id, self::SECRET_META_KEY, $key );
|
|
}
|
|
|
|
/**
|
|
* Delete the TOTP secret key for a user.
|
|
*
|
|
* @param int $user_id User ID.
|
|
*
|
|
* @return boolean If the key was deleted successfully.
|
|
*/
|
|
public function delete_user_totp_key( $user_id ) {
|
|
delete_user_meta( $user_id, self::LAST_SUCCESSFUL_LOGIN_META_KEY );
|
|
return delete_user_meta( $user_id, self::SECRET_META_KEY );
|
|
}
|
|
|
|
/**
|
|
* Check if the TOTP secret key has a proper format.
|
|
*
|
|
* @param string $key TOTP secret key.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function is_valid_key( $key ) {
|
|
$check = sprintf( '/^[%s]+$/', self::$base_32_chars );
|
|
|
|
if ( 1 === preg_match( $check, $key ) ) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Validates authentication.
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
*
|
|
* @return bool Whether the user gave a valid code
|
|
*/
|
|
public function validate_authentication( $user ) {
|
|
$code = $this->sanitize_code_from_request( 'authcode', self::DEFAULT_DIGIT_COUNT );
|
|
if ( ! $code ) {
|
|
return false;
|
|
}
|
|
|
|
return $this->validate_code_for_user( $user, $code );
|
|
}
|
|
|
|
/**
|
|
* Validates an authentication code for a given user, preventing re-use and older TOTP keys.
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
* @param int $code The TOTP token to validate.
|
|
*
|
|
* @return bool Whether the code is valid for the user and a newer code has not been used.
|
|
*/
|
|
public function validate_code_for_user( $user, $code ) {
|
|
$valid_timestamp = $this->get_authcode_valid_ticktime(
|
|
$this->get_user_totp_key( $user->ID ),
|
|
$code
|
|
);
|
|
|
|
if ( ! $valid_timestamp ) {
|
|
return false;
|
|
}
|
|
|
|
$last_totp_login = (int) get_user_meta( $user->ID, self::LAST_SUCCESSFUL_LOGIN_META_KEY, true );
|
|
|
|
// The TOTP authentication is not valid, if we've seen the same or newer code.
|
|
if ( $last_totp_login && $last_totp_login >= $valid_timestamp ) {
|
|
return false;
|
|
}
|
|
|
|
update_user_meta( $user->ID, self::LAST_SUCCESSFUL_LOGIN_META_KEY, $valid_timestamp );
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Checks if a given code is valid for a given key, allowing for a certain amount of time drift.
|
|
*
|
|
* @param string $key The share secret key to use.
|
|
* @param string $authcode The code to test.
|
|
*
|
|
* @return bool Whether the code is valid within the time frame.
|
|
*/
|
|
public static function is_valid_authcode( $key, $authcode ) {
|
|
return (bool) self::get_authcode_valid_ticktime( $key, $authcode );
|
|
}
|
|
|
|
/**
|
|
* Checks if a given code is valid for a given key, allowing for a certain amount of time drift.
|
|
*
|
|
* @param string $key The share secret key to use.
|
|
* @param string $authcode The code to test.
|
|
*
|
|
* @return false|int Returns the timestamp of the authcode on success, False otherwise.
|
|
*/
|
|
public static function get_authcode_valid_ticktime( $key, $authcode ) {
|
|
/**
|
|
* Filter the maximum ticks to allow when checking valid codes.
|
|
*
|
|
* Ticks are the allowed offset from the correct time in 30 second increments,
|
|
* so the default of 4 allows codes that are two minutes to either side of server time
|
|
*
|
|
* @deprecated 0.7.0 Use {@see 'two_factor_totp_time_step_allowance'} instead.
|
|
* @param int $max_ticks Max ticks of time correction to allow. Default 4.
|
|
*/
|
|
$max_ticks = apply_filters_deprecated( 'two-factor-totp-time-step-allowance', array( self::DEFAULT_TIME_STEP_ALLOWANCE ), '0.7.0', 'two_factor_totp_time_step_allowance' );
|
|
|
|
$max_ticks = apply_filters( 'two_factor_totp_time_step_allowance', self::DEFAULT_TIME_STEP_ALLOWANCE );
|
|
|
|
// Array of all ticks to allow, sorted using absolute value to test closest match first.
|
|
$ticks = range( - $max_ticks, $max_ticks );
|
|
usort( $ticks, array( __CLASS__, 'abssort' ) );
|
|
|
|
$time = floor( time() / self::DEFAULT_TIME_STEP_SEC );
|
|
|
|
foreach ( $ticks as $offset ) {
|
|
$log_time = $time + $offset;
|
|
if ( hash_equals( self::calc_totp( $key, $log_time ), $authcode ) ) {
|
|
// Return the tick timestamp.
|
|
return $log_time * self::DEFAULT_TIME_STEP_SEC;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Generates key
|
|
*
|
|
* @param int $bitsize Nume of bits to use for key.
|
|
*
|
|
* @return string $bitsize long string composed of available base32 chars.
|
|
*/
|
|
public static function generate_key( $bitsize = self::DEFAULT_KEY_BIT_SIZE ) {
|
|
$bytes = ceil( $bitsize / 8 );
|
|
$secret = wp_generate_password( $bytes, true, true );
|
|
|
|
return self::base32_encode( $secret );
|
|
}
|
|
|
|
/**
|
|
* Pack stuff
|
|
*
|
|
* @param string $value The value to be packed.
|
|
*
|
|
* @return string Binary packed string.
|
|
*/
|
|
public static function pack64( $value ) {
|
|
// 64bit mode (PHP_INT_SIZE == 8).
|
|
if ( PHP_INT_SIZE >= 8 ) {
|
|
// If we're on PHP 5.6.3+ we can use the new 64bit pack functionality.
|
|
if ( version_compare( PHP_VERSION, '5.6.3', '>=' ) && PHP_INT_SIZE >= 8 ) {
|
|
return pack( 'J', $value ); // phpcs:ignore PHPCompatibility.ParameterValues.NewPackFormat.NewFormatFound
|
|
}
|
|
$highmap = 0xffffffff << 32;
|
|
$higher = ( $value & $highmap ) >> 32;
|
|
} else {
|
|
/*
|
|
* 32bit PHP can't shift 32 bits like that, so we have to assume 0 for the higher
|
|
* and not pack anything beyond it's limits.
|
|
*/
|
|
$higher = 0;
|
|
}
|
|
|
|
$lowmap = 0xffffffff;
|
|
$lower = $value & $lowmap;
|
|
|
|
return pack( 'NN', $higher, $lower );
|
|
}
|
|
|
|
/**
|
|
* Calculate a valid code given the shared secret key
|
|
*
|
|
* @param string $key The shared secret key to use for calculating code.
|
|
* @param mixed $step_count The time step used to calculate the code, which is the floor of time() divided by step size.
|
|
* @param int $digits The number of digits in the returned code.
|
|
* @param string $hash The hash used to calculate the code.
|
|
* @param int $time_step The size of the time step.
|
|
*
|
|
* @return string The totp code
|
|
*/
|
|
public static function calc_totp( $key, $step_count = false, $digits = self::DEFAULT_DIGIT_COUNT, $hash = self::DEFAULT_CRYPTO, $time_step = self::DEFAULT_TIME_STEP_SEC ) {
|
|
$secret = self::base32_decode( $key );
|
|
|
|
if ( false === $step_count ) {
|
|
$step_count = floor( time() / $time_step );
|
|
}
|
|
|
|
$timestamp = self::pack64( $step_count );
|
|
|
|
$hash = hash_hmac( $hash, $timestamp, $secret, true );
|
|
|
|
$offset = ord( $hash[19] ) & 0xf;
|
|
|
|
$code = (
|
|
( ( ord( $hash[ $offset + 0 ] ) & 0x7f ) << 24 ) |
|
|
( ( ord( $hash[ $offset + 1 ] ) & 0xff ) << 16 ) |
|
|
( ( ord( $hash[ $offset + 2 ] ) & 0xff ) << 8 ) |
|
|
( ord( $hash[ $offset + 3 ] ) & 0xff )
|
|
) % pow( 10, $digits );
|
|
|
|
return str_pad( $code, $digits, '0', STR_PAD_LEFT );
|
|
}
|
|
|
|
/**
|
|
* Whether this Two Factor provider is configured and available for the user specified.
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function is_available_for_user( $user ) {
|
|
// Only available if the secret key has been saved for the user.
|
|
$key = $this->get_user_totp_key( $user->ID );
|
|
|
|
return ! empty( $key );
|
|
}
|
|
|
|
/**
|
|
* Prints the form that prompts the user to authenticate.
|
|
*
|
|
* @param WP_User $user WP_User object of the logged-in user.
|
|
*
|
|
* @codeCoverageIgnore
|
|
*/
|
|
public function authentication_page( $user ) {
|
|
require_once ABSPATH . '/wp-admin/includes/template.php';
|
|
?>
|
|
<p class="two-factor-prompt">
|
|
<?php esc_html_e( 'Please enter the code generated by your authenticator app.', 'two-factor' ); ?>
|
|
</p>
|
|
<p>
|
|
<label for="authcode"><?php esc_html_e( 'Authentication Code:', 'two-factor' ); ?></label>
|
|
<input type="text" inputmode="numeric" autocomplete="one-time-code" name="authcode" id="authcode" class="input authcode" value="" size="20" pattern="[0-9 ]*" placeholder="123 456" data-digits="<?php echo esc_attr( self::DEFAULT_DIGIT_COUNT ); ?>" />
|
|
</p>
|
|
<script type="text/javascript">
|
|
setTimeout( function(){
|
|
var d;
|
|
try{
|
|
d = document.getElementById('authcode');
|
|
d.focus();
|
|
} catch(e){}
|
|
}, 200);
|
|
</script>
|
|
<?php
|
|
submit_button( __( 'Authenticate', 'two-factor' ) );
|
|
}
|
|
|
|
/**
|
|
* Returns a base32 encoded string.
|
|
*
|
|
* @param string $string String to be encoded using base32.
|
|
*
|
|
* @return string base32 encoded string without padding.
|
|
*/
|
|
public static function base32_encode( $string ) {
|
|
if ( empty( $string ) ) {
|
|
return '';
|
|
}
|
|
|
|
$binary_string = '';
|
|
|
|
foreach ( str_split( $string ) as $character ) {
|
|
$binary_string .= str_pad( base_convert( ord( $character ), 10, 2 ), 8, '0', STR_PAD_LEFT );
|
|
}
|
|
|
|
$five_bit_sections = str_split( $binary_string, 5 );
|
|
$base32_string = '';
|
|
|
|
foreach ( $five_bit_sections as $five_bit_section ) {
|
|
$base32_string .= self::$base_32_chars[ base_convert( str_pad( $five_bit_section, 5, '0' ), 2, 10 ) ];
|
|
}
|
|
|
|
return $base32_string;
|
|
}
|
|
|
|
/**
|
|
* Decode a base32 string and return a binary representation
|
|
*
|
|
* @param string $base32_string The base 32 string to decode.
|
|
*
|
|
* @throws Exception If string contains non-base32 characters.
|
|
*
|
|
* @return string Binary representation of decoded string
|
|
*/
|
|
public static function base32_decode( $base32_string ) {
|
|
|
|
$base32_string = strtoupper( $base32_string );
|
|
|
|
if ( ! preg_match( '/^[' . self::$base_32_chars . ']+$/', $base32_string, $match ) ) {
|
|
throw new Exception( 'Invalid characters in the base32 string.' );
|
|
}
|
|
|
|
$l = strlen( $base32_string );
|
|
$n = 0;
|
|
$j = 0;
|
|
$binary = '';
|
|
|
|
for ( $i = 0; $i < $l; $i++ ) {
|
|
|
|
$n = $n << 5; // Move buffer left by 5 to make room.
|
|
$n = $n + strpos( self::$base_32_chars, $base32_string[ $i ] ); // Add value into buffer.
|
|
$j += 5; // Keep track of number of bits in buffer.
|
|
|
|
if ( $j >= 8 ) {
|
|
$j -= 8;
|
|
$binary .= chr( ( $n & ( 0xFF << $j ) ) >> $j );
|
|
}
|
|
}
|
|
|
|
return $binary;
|
|
}
|
|
|
|
/**
|
|
* Used with usort to sort an array by distance from 0
|
|
*
|
|
* @param int $a First array element.
|
|
* @param int $b Second array element.
|
|
*
|
|
* @return int -1, 0, or 1 as needed by usort
|
|
*/
|
|
private static function abssort( $a, $b ) {
|
|
$a = abs( $a );
|
|
$b = abs( $b );
|
|
if ( $a === $b ) {
|
|
return 0;
|
|
}
|
|
return ( $a < $b ) ? -1 : 1;
|
|
}
|
|
}
|