2fa: first draft

system/src/Models/AccountEMailCode.php

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+<?php
+
+namespace MyAAC\Models;
+use Illuminate\Database\Eloquent\Model;
+
+class AccountEMailCode extends Model {
+
+	protected $table = TABLE_PREFIX . 'account_email_codes';
+
+	public $timestamps = false;
+
+	protected $fillable = ['account_id', 'code', 'created_at'];
+
+}

system/src/TwoFactorAuth/Gateway/AppAuthGateway.php

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+<?php
+
+namespace MyAAC\TwoFactorAuth\Gateway;
+
+use MyAAC\TwoFactorAuth\Interface\AuthGatewayInterface;
+
+class AppAuthGateway extends BaseAuthGateway implements AuthGatewayInterface
+{
+	public function verifyCode(string $code): bool
+	{
+		return true;
+	}
+}

system/src/TwoFactorAuth/Gateway/BaseAuthGateway.php

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+<?php
+
+namespace MyAAC\TwoFactorAuth\Gateway;
+
+class BaseAuthGateway
+{
+	protected \OTS_Account $account;
+
+	public function __construct(\OTS_Account $account) {
+		$this->account = $account;
+	}
+}

system/src/TwoFactorAuth/Gateway/EmailAuthGateway.php

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+<?php
+
+namespace MyAAC\TwoFactorAuth\Gateway;
+
+use MyAAC\Models\AccountEMailCode;
+use MyAAC\TwoFactorAuth\Interface\AuthGatewayInterface;
+use MyAAC\TwoFactorAuth\TwoFactorAuth;
+
+class EmailAuthGateway extends BaseAuthGateway implements AuthGatewayInterface
+{
+	public function verifyCode(string $code): bool
+	{
+		return AccountEMailCode::where('account_id', '=', $this->account->getId())->where('code', $code)->where('created_at', '>', time() - TwoFactorAuth::EMAIL_CODE_VALID_UNTIL)->first() !== null;
+	}
+
+	public function hasRecentEmailCode(): bool {
+		return AccountEMailCode::where('account_id', '=', $this->account->getId())->where('created_at', '>', time() - TwoFactorAuth::EMAIL_CODE_VALID_UNTIL)->first() !== null;
+	}
+
+	public function deleteOldCodes(): void {
+		AccountEMailCode::where('account_id', '=', $this->account->getId())->delete();
+	}
+
+	public function resendEmailCode(): void
+	{
+		global $twig;
+
+		$newCode = generateRandomString(6, true, false, true);
+		AccountEMailCode::create([
+			'account_id' => $this->account->getId(),
+			'code' => $newCode,
+			'created_at' => time(),
+		]);
+
+		$mailBody = $twig->render('mail.account.2fa.email-code.html.twig', [
+			'code' => $newCode,
+		]);
+
+		if (!_mail($this->account->getEMail(), configLua('serverName') . ' - Requested Authentication Email Code', $mailBody)) {
+			error('An error occurred while sending email. For Admin: More info can be found in system/logs/mailer-error.log');
+		}
+	}
+}
+

system/src/TwoFactorAuth/Interface/AuthGatewayInterface.php

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+<?php
+
+namespace MyAAC\TwoFactorAuth\Interface;
+
+interface AuthGatewayInterface
+{
+	public function __construct(\OTS_Account $account);
+	public function verifyCode(string $code): bool;
+}

system/src/TwoFactorAuth/TwoFactorAuth.php

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+<?php
+
+namespace MyAAC\TwoFactorAuth;
+
+use MyAAC\Models\AccountEMailCode;
+use MyAAC\TwoFactorAuth\Gateway\AppAuthGateway;
+use MyAAC\TwoFactorAuth\Gateway\EmailAuthGateway;
+use MyAAC\TwoFactorAuth\Interface\AuthGatewayInterface;
+
+class TwoFactorAuth
+{
+	const TYPE_NONE = 0;
+	const TYPE_EMAIL = 1;
+	const TYPE_APP = 2;
+
+	const EMAIL_CODE_VALID_UNTIL = 24 * 60 * 60;
+
+	private \OTS_Account $account;
+	private int $authType;
+	private EmailAuthGateway|AppAuthGateway $authGateway;
+
+	public function __construct(\OTS_Account $account) {
+		$this->account = $account;
+
+		$this->authType = (int)$this->account->getCustomField('2fa_type');
+		if ($this->authType === self::TYPE_EMAIL) {
+			$this->authGateway = new EmailAuthGateway($account);
+		}
+		else if ($this->authType === self::TYPE_APP) {
+			$this->authGateway = new AppAuthGateway($account);
+		}
+	}
+
+	public function process()
+	{
+		global $twig;
+
+		if ($this->authType == TwoFactorAuth::TYPE_EMAIL) {
+			if (!$this->authGateway->hasRecentEmailCode()) {
+				$this->authGateway->resendEmailCode();
+				success('Resent email.');
+			}
+
+			define('HIDE_LOGIN_BOX', true);
+			$twig->display('account.2fa.email-code.login.html.twig');
+			return false;
+		}
+
+		return true;
+	}
+
+	public function isActive(): bool {
+		return $this->authType != self::TYPE_NONE;
+	}
+
+	public function getAuthType(): int {
+		return $this->authType;
+	}
+
+	public function getAuthGateway(): AppAuthGateway|EmailAuthGateway  {
+		return $this->authGateway;
+	}
+}