ttrss/plugins/auth_internal/init.php

	<?php
	class Auth_Internal extends Plugin implements IAuthModule {

		private $host;

		function about() {
			return array(1.0,
				"Authenticates against internal tt-rss database",
				"fox",
				true);
		}

		/* @var PluginHost $host */
		function init($host) {
			$this->host = $host;
			$this->pdo = Db::pdo();

			$host->add_hook($host::HOOK_AUTH_USER, $this);
		}

		function authenticate($login, $password, $service = '') {

			$pwd_hash1 = encrypt_password($password);
			$pwd_hash2 = encrypt_password($password, $login);
			$otp = $_REQUEST["otp"];

			if (get_schema_version() > 96) {

				$sth = $this->pdo->prepare("SELECT otp_enabled,salt FROM ttrss_users WHERE
					login = ?");
				$sth->execute([$login]);

				if ($row = $sth->fetch()) {

					$base32 = new \OTPHP\Base32();

					$otp_enabled = $row['otp_enabled'];
					$secret = $base32->encode(mb_substr(sha1($row["salt"]), 0, 12), false);

					$topt = new \OTPHP\TOTP($secret);
					$otp_check = $topt->now();

					if ($otp_enabled) {

						// only allow app password checking if OTP is enabled
						if ($service && get_schema_version() > 138) {
							return $this->check_app_password($login, $password, $service);
						}

						if ($otp) {
							if ($otp != $otp_check) {
								return false;
							}
						} else {
							$return = urlencode($_REQUEST["return"]);
							?>
							<!DOCTYPE html>
							<html>
								<head>
									<title>Tiny Tiny RSS</title>
									<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
								</head>
								<?php echo stylesheet_tag("css/default.css") ?>
							<body class="ttrss_utility otp">
							<h1><?php echo __("Authentication") ?></h1>
							<div class="content">
							<form action="public.php?return=<?php echo $return ?>"
									method="POST" class="otpform">
								<input type="hidden" name="op" value="login">
								<input type="hidden" name="login" value="<?php echo htmlspecialchars($login) ?>">
								<input type="hidden" name="password" value="<?php echo htmlspecialchars($password) ?>">
								<input type="hidden" name="bw_limit" value="<?php echo htmlspecialchars($_POST["bw_limit"]) ?>">
								<input type="hidden" name="remember_me" value="<?php echo htmlspecialchars($_POST["remember_me"]) ?>">
								<input type="hidden" name="profile" value="<?php echo htmlspecialchars($_POST["profile"]) ?>">

								<fieldset>
									<label><?php echo __("Please enter your one time password:") ?></label>
									<input autocomplete="off" size="6" name="otp" value=""/>
									<input type="submit" value="Continue"/>
								</fieldset>
							</form></div>
							<script type="text/javascript">
								document.forms[0].otp.focus();
							</script>
							<?php
							exit;
						}
					}
				}
			}

			// check app passwords first but allow regular password as a fallback for the time being
			// if OTP is not enabled

			if ($service && get_schema_version() > 138) {
				$user_id = $this->check_app_password($login, $password, $service);

				if ($user_id)
					return $user_id;
			}

			if (get_schema_version() > 87) {

				$sth = $this->pdo->prepare("SELECT salt FROM ttrss_users WHERE login = ?");
				$sth->execute([$login]);

				if ($row = $sth->fetch()) {
					$salt = $row['salt'];

					if ($salt == "") {

						$sth = $this->pdo->prepare("SELECT id FROM ttrss_users WHERE
							login = ? AND (pwd_hash = ? OR pwd_hash = ?)");

						$sth->execute([$login, $pwd_hash1, $pwd_hash2]);

						// verify and upgrade password to new salt base

						if ($row = $sth->fetch()) {
							// upgrade password to MODE2

							$user_id = $row['id'];

							$salt = substr(bin2hex(get_random_bytes(125)), 0, 250);
							$pwd_hash = encrypt_password($password, $salt, true);

							$sth = $this->pdo->prepare("UPDATE ttrss_users SET
								pwd_hash = ?, salt = ? WHERE login = ?");

							$sth->execute([$pwd_hash, $salt, $login]);

							return $user_id;

						} else {
							return false;
						}

					} else {
						$pwd_hash = encrypt_password($password, $salt, true);

						$sth = $this->pdo->prepare("SELECT id
							  FROM ttrss_users WHERE
							  login = ? AND pwd_hash = ?");
						$sth->execute([$login, $pwd_hash]);

						if ($row = $sth->fetch()) {
							return $row['id'];
						}
					}

				} else {
					$sth = $this->pdo->prepare("SELECT id
						FROM ttrss_users WHERE
						  login = ? AND (pwd_hash = ? OR pwd_hash = ?)");

					$sth->execute([$login, $pwd_hash1, $pwd_hash2]);

					if ($row = $sth->fetch()) {
						return $row['id'];
					}
				}
			} else {
				$sth = $this->pdo->prepare("SELECT id
						FROM ttrss_users WHERE
						  login = ? AND (pwd_hash = ? OR pwd_hash = ?)");

				$sth->execute([$login, $pwd_hash1, $pwd_hash2]);

				if ($row = $sth->fetch()) {
					return $row['id'];
				}
			}

			return false;
		}

		function check_password($owner_uid, $password) {

			$sth = $this->pdo->prepare("SELECT salt,login,otp_enabled FROM ttrss_users WHERE
				id = ?");
			$sth->execute([$owner_uid]);

			if ($row = $sth->fetch()) {

				$salt = $row['salt'];
				$login = $row['login'];

				if (!$salt) {
					$password_hash1 = encrypt_password($password);
					$password_hash2 = encrypt_password($password, $login);

					$sth = $this->pdo->prepare("SELECT id FROM ttrss_users WHERE
						id = ? AND (pwd_hash = ? OR pwd_hash = ?)");

					$sth->execute([$owner_uid, $password_hash1, $password_hash2]);

					return $sth->fetch();

				} else {
					$password_hash = encrypt_password($password, $salt, true);

					$sth = $this->pdo->prepare("SELECT id FROM ttrss_users WHERE
						id = ? AND pwd_hash = ?");

					$sth->execute([$owner_uid, $password_hash]);

					return $sth->fetch();
				}
			}

			return false;
		}

		function change_password($owner_uid, $old_password, $new_password) {

			if ($this->check_password($owner_uid, $old_password)) {

				$new_salt = substr(bin2hex(get_random_bytes(125)), 0, 250);
				$new_password_hash = encrypt_password($new_password, $new_salt, true);

				$sth = $this->pdo->prepare("UPDATE ttrss_users SET
					pwd_hash = ?, salt = ?, otp_enabled = false
						WHERE id = ?");
				$sth->execute([$new_password_hash, $new_salt, $owner_uid]);

				$_SESSION["pwd_hash"] = $new_password_hash;

				$sth = $this->pdo->prepare("SELECT email, login FROM ttrss_users WHERE id = ?");
				$sth->execute([$owner_uid]);

				if ($row = $sth->fetch()) {
					$mailer = new Mailer();

					require_once "lib/MiniTemplator.class.php";

					$tpl = new MiniTemplator;

					$tpl->readTemplateFromFile("templates/password_change_template.txt");

					$tpl->setVariable('LOGIN', $row["login"]);
					$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);

					$tpl->addBlock('message');

					$tpl->generateOutputToString($message);

					$mailer->mail(["to_name" => $row["login"],
						"to_address" => $row["email"],
						"subject" => "[tt-rss] Password change notification",
						"message" => $message]);

				}

				return __("Password has been changed.");
			} else {
				return "ERROR: ".__('Old password is incorrect.');
			}
		}

		private function check_app_password($login, $password, $service) {
			$sth = $this->pdo->prepare("SELECT p.id, p.pwd_hash, u.id AS uid 
				FROM ttrss_app_passwords p, ttrss_users u 
				WHERE p.owner_uid = u.id AND u.login = ? AND service = ?");
			$sth->execute([$login, $service]);

			while ($row = $sth->fetch()) {
				list ($algo, $hash, $salt) = explode(":", $row["pwd_hash"]);

				if ($algo == "SSHA-512") {
					$test_hash = hash('sha512', $salt . $password);

					if ($test_hash == $hash) {
						$usth = $this->pdo->prepare("UPDATE ttrss_app_passwords SET last_used = NOW() WHERE id = ?");
						$usth->execute([$row['id']]);

						return $row['uid'];
					}
				} else {
					user_error("Got unknown algo of app password for user $login: $algo");
				}
			}

			return false;
		}

		function api_version() {
			return 2;
		}

	}