installed plugin Two Factor version 0.7.3

wp-content/plugins/two-factor/providers/class-two-factor-provider.php

@@ -0,0 +1,102 @@
+<?php
+/**
+ * Abstract class for creating two factor authentication providers.
+ *
+ * @package Two_Factor
+ */
+
+/**
+ * Abstract class for creating two factor authentication providers.
+ *
+ * @since 0.1-dev
+ *
+ * @package Two_Factor
+ */
+abstract class Two_Factor_Provider {
+
+	/**
+	 * Class constructor.
+	 *
+	 * @since 0.1-dev
+	 */
+	protected function __construct() {
+		return $this;
+	}
+
+	/**
+	 * Returns the name of the provider.
+	 *
+	 * @since 0.1-dev
+	 *
+	 * @return string
+	 */
+	abstract public function get_label();
+
+	/**
+	 * Prints the name of the provider.
+	 *
+	 * @since 0.1-dev
+	 */
+	public function print_label() {
+		echo esc_html( $this->get_label() );
+	}
+
+	/**
+	 * 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.
+	 */
+	abstract public function authentication_page( $user );
+
+	/**
+	 * Allow providers to do extra processing before the authentication.
+	 * Return `true` to prevent the authentication and render the
+	 * authentication page.
+	 *
+	 * @param  WP_User $user WP_User object of the logged-in user.
+	 * @return boolean
+	 */
+	public function pre_process_authentication( $user ) {
+		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
+	 */
+	abstract public function validate_authentication( $user );
+
+	/**
+	 * 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
+	 */
+	abstract public function is_available_for_user( $user );
+
+	/**
+	 * Generate a random eight-digit string to send out as an auth code.
+	 *
+	 * @since 0.1-dev
+	 *
+	 * @param int          $length The code length.
+	 * @param string|array $chars Valid auth code characters.
+	 * @return string
+	 */
+	public function get_code( $length = 8, $chars = '1234567890' ) {
+		$code = '';
+		if ( is_array( $chars ) ) {
+			$chars = implode( '', $chars );
+		}
+		for ( $i = 0; $i < $length; $i++ ) {
+			$code .= substr( $chars, wp_rand( 0, strlen( $chars ) - 1 ), 1 );
+		}
+		return $code;
+	}
+}