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368
lib/Provider.php
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368
lib/Provider.php
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<?php
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declare(strict_types=1);
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namespace KTXM\AuthenticationProviderMail;
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use KTXF\Mail\Entity\Address;
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use KTXF\Mail\Entity\IMessageBase;
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use KTXF\Mail\Queue\SendOptions;
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use KTXF\Mail\Service\IServiceBase;
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use KTXF\Mail\Service\IServiceSend;
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use KTXF\Security\Authentication\AuthenticationProviderAbstract;
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use KTXF\Security\Authentication\ProviderContext;
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use KTXF\Security\Authentication\ProviderResult;
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use KTXM\AuthenticationProviderMail\Stores\ChallengeStore;
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use KTXM\MailManager\Manager as MailManager;
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use Psr\Log\LoggerInterface;
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/**
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* Email Challenge Authentication Provider
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*
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* Authenticates users by sending a one-time verification code to their email.
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* Uses the mail manager system for sending verification emails.
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*/
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class Provider extends AuthenticationProviderAbstract
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{
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private const DEFAULT_CODE_TTL = 300; // 5 minutes
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private const DEFAULT_DIGITS = 6;
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public function __construct(
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private readonly ChallengeStore $challengeStore,
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private readonly MailManager $mailManager,
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private readonly LoggerInterface $logger,
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) {}
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// =========================================================================
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// Provider Implementation
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// =========================================================================
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public function type(): string
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{
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return 'authentication';
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}
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public function identifier(): string
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{
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return 'mail';
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}
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public function method(): string
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{
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return self::METHOD_CHALLENGE;
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}
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public function label(): string
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{
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return 'Email Code';
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}
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public function description(): string
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{
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return 'Authenticate using a one-time verification code sent to your email address.';
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}
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public function icon(): string
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{
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return 'mail';
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}
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/**
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* Begin the email challenge
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*
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* Generates a verification code and sends it to the user's email.
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*/
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public function beginChallenge(ProviderContext $context): ProviderResult
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{
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$tenantId = $context->tenantId;
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$userIdentity = $context->userIdentity; // Email address
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if (empty($tenantId)) {
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return ProviderResult::failed(
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ProviderResult::ERROR_INTERNAL,
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'Invalid tenant context'
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);
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}
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if (empty($userIdentity)) {
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return ProviderResult::failed(
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ProviderResult::ERROR_INVALID_CREDENTIALS,
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'Email address is required'
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);
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}
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// Validate email format
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if (!filter_var($userIdentity, FILTER_VALIDATE_EMAIL)) {
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return ProviderResult::failed(
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ProviderResult::ERROR_INVALID_CREDENTIALS,
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'Invalid email address format'
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);
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}
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// Check for existing pending challenge (rate limiting)
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if ($this->challengeStore->hasPending($tenantId, $userIdentity)) {
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// Allow resend but inform user
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$this->logger->debug('Resending email challenge', [
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'tenantId' => $tenantId,
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]);
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}
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// Generate and store challenge
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$ttl = $context->getConfig('code_ttl', self::DEFAULT_CODE_TTL);
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$challenge = $this->challengeStore->create($tenantId, $userIdentity, $ttl);
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// Send verification email
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$emailResult = $this->sendVerificationEmail(
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$tenantId,
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$userIdentity,
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$challenge['code'],
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$challenge['expires'],
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$context
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);
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if (!$emailResult['success']) {
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// Invalidate the challenge since email failed
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$this->challengeStore->invalidate($tenantId, $userIdentity);
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$this->logger->error('Failed to send verification email', [
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'tenantId' => $tenantId,
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'error' => $emailResult['error'] ?? 'Unknown error',
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]);
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return ProviderResult::failed(
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ProviderResult::ERROR_INTERNAL,
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'Failed to send verification email'
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);
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}
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$this->logger->info('Email challenge initiated', [
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'tenantId' => $tenantId,
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'expires' => $challenge['expires'],
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]);
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return ProviderResult::challenge(
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[
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'type' => 'email',
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'message' => 'A verification code has been sent to your email address',
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'digits' => self::DEFAULT_DIGITS,
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'expires_in' => $ttl,
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'masked_email' => $this->maskEmail($userIdentity),
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],
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[
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'identity' => $userIdentity,
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'challenge_expires' => $challenge['expires'],
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]
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);
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}
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/**
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* Verify the email challenge code
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*/
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public function verifyChallenge(ProviderContext $context, string $code): ProviderResult
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{
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$tenantId = $context->tenantId;
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$userIdentity = $context->userIdentity ?? $context->getMeta('identity');
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if (empty($tenantId)) {
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return ProviderResult::failed(
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ProviderResult::ERROR_INTERNAL,
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'Invalid tenant context'
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);
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}
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if (empty($userIdentity)) {
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return ProviderResult::failed(
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ProviderResult::ERROR_INVALID_CREDENTIALS,
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'Identity is required'
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);
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}
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// Normalize code (remove spaces, dashes)
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$code = preg_replace('/[\s\-]/', '', $code);
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// Verify the challenge
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$result = $this->challengeStore->verify($tenantId, $userIdentity, $code);
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if (!$result['success']) {
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$this->logger->debug('Email challenge verification failed', [
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'tenantId' => $tenantId,
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'error' => $result['error'] ?? 'Unknown',
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]);
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return ProviderResult::failed(
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ProviderResult::ERROR_FACTOR_FAILED,
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$result['error'] ?? 'Invalid verification code'
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);
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}
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$this->logger->info('Email challenge verified successfully', [
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'tenantId' => $tenantId,
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]);
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return ProviderResult::success([
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'identity' => $userIdentity,
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'provider' => $this->identifier(),
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'verified_email' => $userIdentity,
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]);
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}
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/**
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* Direct verify (not typically used for email, but implemented for interface)
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*/
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public function verify(ProviderContext $context, string $secret): ProviderResult
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{
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return $this->verifyChallenge($context, $secret);
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}
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// =========================================================================
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// Email Sending
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// =========================================================================
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/**
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* Send the verification email
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*/
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private function sendVerificationEmail(
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string $tenantId,
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string $recipientEmail,
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string $code,
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int $expires,
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ProviderContext $context
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): array {
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try {
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// Get the default system mail service
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$service = $this->mailManager->serviceFindByAddress(
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$tenantId,
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null,
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'authentication@system'
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);
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if ($service instanceof IServiceSend === false) {
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return [
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'success' => false,
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'error' => 'No mail service configured',
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];
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}
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// Build the message
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$message = $service->messageFresh();
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$message->setTo([new Address($recipientEmail)]);
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$message->setSubject('Your verification code');
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// Format code with spaces for readability (123 456)
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$formattedCode = wordwrap($code, 3, ' ', true);
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// Calculate remaining time
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$remainingMinutes = ceil(($expires - time()) / 60);
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// Build email body
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$textBody = $this->buildTextBody($formattedCode, (int)$remainingMinutes);
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$htmlBody = $this->buildHtmlBody($formattedCode, (int)$remainingMinutes);
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$message->setBodyText($textBody);
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$message->setBodyHtml($htmlBody);
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// Send immediately (2FA is time-sensitive)
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$this->mailManager->send(
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$tenantId,
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null,
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$message,
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new SendOptions(immediate: true)
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);
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return ['success' => true];
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} catch (\Throwable $e) {
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$this->logger->error('Email send failed', [
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'error' => $e->getMessage(),
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'trace' => $e->getTraceAsString(),
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]);
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return [
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'success' => false,
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'error' => $e->getMessage(),
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];
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}
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}
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/**
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* Build plain text email body
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*/
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private function buildTextBody(string $code, int $minutes): string
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{
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return <<<TEXT
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Your verification code is: $code
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This code will expire in $minutes minute(s).
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If you did not request this code, please ignore this email.
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---
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This is an automated message. Please do not reply.
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TEXT;
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}
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/**
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* Build HTML email body
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*/
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private function buildHtmlBody(string $code, int $minutes): string
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{
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return <<<HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Verification Code</title>
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</head>
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<body style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif; background-color: #f5f5f5; margin: 0; padding: 20px;">
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<div style="max-width: 480px; margin: 0 auto; background-color: #ffffff; border-radius: 8px; padding: 40px; box-shadow: 0 2px 4px rgba(0,0,0,0.1);">
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<h1 style="color: #333333; font-size: 24px; margin: 0 0 20px 0; text-align: center;">
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Verification Code
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</h1>
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<p style="color: #666666; font-size: 16px; margin: 0 0 30px 0; text-align: center;">
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Enter the following code to verify your identity:
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</p>
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<div style="background-color: #f0f0f0; border-radius: 8px; padding: 20px; text-align: center; margin: 0 0 30px 0;">
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<span style="font-family: 'Monaco', 'Menlo', 'Courier New', monospace; font-size: 32px; font-weight: bold; letter-spacing: 4px; color: #333333;">
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$code
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</span>
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</div>
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<p style="color: #999999; font-size: 14px; margin: 0 0 20px 0; text-align: center;">
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This code will expire in <strong>$minutes minute(s)</strong>.
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</p>
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<hr style="border: none; border-top: 1px solid #eeeeee; margin: 30px 0;">
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<p style="color: #999999; font-size: 12px; margin: 0; text-align: center;">
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If you did not request this code, please ignore this email.
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</p>
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</div>
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</body>
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</html>
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HTML;
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}
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/**
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* Mask email address for display
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*/
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private function maskEmail(string $email): string
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{
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$parts = explode('@', $email);
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if (count($parts) !== 2) {
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return '***@***';
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}
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$local = $parts[0];
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$domain = $parts[1];
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// Show first 2 chars of local part
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$maskedLocal = substr($local, 0, 2) . str_repeat('*', max(3, strlen($local) - 2));
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// Show domain
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return $maskedLocal . '@' . $domain;
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}
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}
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