Add Sign in with Apple authentication
- Add AppleSocialAuth model to store Apple ID linkages - Create AppleAuthService for JWT verification with Apple's public keys - Add AppleSignIn handler and route (POST /auth/apple-sign-in/) - Implement account linking (links Apple ID to existing accounts by email) - Add Redis caching for Apple public keys (24-hour TTL) - Support private relay emails (@privaterelay.appleid.com) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Trey t
@@ -1,10 +1,12 @@
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package services
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import (
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"context"
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"crypto/rand"
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"encoding/hex"
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"errors"
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"fmt"
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"strings"
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"time"
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"golang.org/x/crypto/bcrypt"
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@@ -26,6 +28,7 @@ var (
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ErrAlreadyVerified = errors.New("email already verified")
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ErrRateLimitExceeded = errors.New("too many requests, please try again later")
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ErrInvalidResetToken = errors.New("invalid or expired reset token")
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ErrAppleSignInFailed = errors.New("Apple Sign In failed")
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)
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// AuthService handles authentication business logic
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@@ -137,8 +140,13 @@ func (s *AuthService) Register(req *requests.RegisterRequest) (*responses.Regist
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return nil, "", fmt.Errorf("failed to create token: %w", err)
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}
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// Generate confirmation code
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code := generateSixDigitCode()
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// Generate confirmation code - use fixed code in debug mode for easier local testing
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var code string
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if s.cfg.Server.Debug {
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code = "123456"
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} else {
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code = generateSixDigitCode()
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}
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expiresAt := time.Now().UTC().Add(s.cfg.Security.ConfirmationExpiry)
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if _, err := s.userRepo.CreateConfirmationCode(user.ID, code, expiresAt); err != nil {
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@@ -268,8 +276,13 @@ func (s *AuthService) ResendVerificationCode(userID uint) (string, error) {
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return "", ErrAlreadyVerified
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}
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// Generate new code
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code := generateSixDigitCode()
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// Generate new code - use fixed code in debug mode for easier local testing
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var code string
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if s.cfg.Server.Debug {
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code = "123456"
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} else {
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code = generateSixDigitCode()
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}
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expiresAt := time.Now().UTC().Add(s.cfg.Security.ConfirmationExpiry)
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if _, err := s.userRepo.CreateConfirmationCode(userID, code, expiresAt); err != nil {
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@@ -300,8 +313,13 @@ func (s *AuthService) ForgotPassword(email string) (string, *models.User, error)
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return "", nil, ErrRateLimitExceeded
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}
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// Generate code and reset token
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code := generateSixDigitCode()
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// Generate code and reset token - use fixed code in debug mode for easier local testing
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var code string
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if s.cfg.Server.Debug {
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code = "123456"
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} else {
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code = generateSixDigitCode()
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}
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resetToken := generateResetToken()
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expiresAt := time.Now().UTC().Add(s.cfg.Security.PasswordResetExpiry)
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@@ -398,6 +416,140 @@ func (s *AuthService) ResetPassword(resetToken, newPassword string) error {
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return nil
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}
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// AppleSignIn handles Sign in with Apple authentication
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func (s *AuthService) AppleSignIn(ctx context.Context, appleAuth *AppleAuthService, req *requests.AppleSignInRequest) (*responses.AppleSignInResponse, error) {
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// 1. Verify the Apple JWT token
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claims, err := appleAuth.VerifyIdentityToken(ctx, req.IDToken)
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if err != nil {
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return nil, fmt.Errorf("%w: %v", ErrAppleSignInFailed, err)
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}
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// Use the subject from claims as the authoritative Apple ID
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appleID := claims.Subject
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if appleID == "" {
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appleID = req.UserID // Fallback to request UserID
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}
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// 2. Check if this Apple ID is already linked to an account
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existingAuth, err := s.userRepo.FindByAppleID(appleID)
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if err == nil && existingAuth != nil {
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// User already linked with this Apple ID - log them in
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user, err := s.userRepo.FindByIDWithProfile(existingAuth.UserID)
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if err != nil {
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return nil, fmt.Errorf("failed to find user: %w", err)
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}
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if !user.IsActive {
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return nil, ErrUserInactive
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}
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// Get or create token
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token, err := s.userRepo.GetOrCreateToken(user.ID)
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if err != nil {
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return nil, fmt.Errorf("failed to create token: %w", err)
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}
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// Update last login
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_ = s.userRepo.UpdateLastLogin(user.ID)
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return &responses.AppleSignInResponse{
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Token: token.Key,
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User: responses.NewUserResponse(user),
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IsNewUser: false,
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}, nil
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}
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// 3. Check if email matches an existing user (for account linking)
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email := getEmailFromRequest(req.Email, claims.Email)
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if email != "" {
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existingUser, err := s.userRepo.FindByEmail(email)
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if err == nil && existingUser != nil {
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// Link Apple ID to existing account
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appleAuthRecord := &models.AppleSocialAuth{
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UserID: existingUser.ID,
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AppleID: appleID,
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Email: email,
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IsPrivateEmail: isPrivateRelayEmail(email) || claims.IsPrivateRelayEmail(),
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}
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if err := s.userRepo.CreateAppleSocialAuth(appleAuthRecord); err != nil {
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return nil, fmt.Errorf("failed to link Apple ID: %w", err)
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}
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// Mark as verified since Apple verified the email
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_ = s.userRepo.SetProfileVerified(existingUser.ID, true)
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// Get or create token
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token, err := s.userRepo.GetOrCreateToken(existingUser.ID)
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if err != nil {
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return nil, fmt.Errorf("failed to create token: %w", err)
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}
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// Update last login
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_ = s.userRepo.UpdateLastLogin(existingUser.ID)
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// Reload user with profile
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existingUser, _ = s.userRepo.FindByIDWithProfile(existingUser.ID)
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return &responses.AppleSignInResponse{
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Token: token.Key,
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User: responses.NewUserResponse(existingUser),
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IsNewUser: false,
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}, nil
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}
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}
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// 4. Create new user
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username := generateUniqueUsername(email, req.FirstName)
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user := &models.User{
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Username: username,
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Email: getEmailOrDefault(email),
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FirstName: getStringOrEmpty(req.FirstName),
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LastName: getStringOrEmpty(req.LastName),
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IsActive: true,
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}
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// Set a random password (user won't use it since they log in with Apple)
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randomPassword := generateResetToken()
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_ = user.SetPassword(randomPassword)
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if err := s.userRepo.Create(user); err != nil {
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return nil, fmt.Errorf("failed to create user: %w", err)
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}
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// Create profile (already verified since Apple verified)
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profile, _ := s.userRepo.GetOrCreateProfile(user.ID)
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if profile != nil {
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_ = s.userRepo.SetProfileVerified(user.ID, true)
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}
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// Link Apple ID
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appleAuthRecord := &models.AppleSocialAuth{
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UserID: user.ID,
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AppleID: appleID,
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Email: getEmailOrDefault(email),
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IsPrivateEmail: isPrivateRelayEmail(email) || claims.IsPrivateRelayEmail(),
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}
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if err := s.userRepo.CreateAppleSocialAuth(appleAuthRecord); err != nil {
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return nil, fmt.Errorf("failed to create Apple auth: %w", err)
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}
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// Create token
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token, err := s.userRepo.GetOrCreateToken(user.ID)
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if err != nil {
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return nil, fmt.Errorf("failed to create token: %w", err)
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}
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// Reload user with profile
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user, _ = s.userRepo.FindByIDWithProfile(user.ID)
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return &responses.AppleSignInResponse{
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Token: token.Key,
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User: responses.NewUserResponse(user),
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IsNewUser: true,
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}, nil
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}
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// Helper functions
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func generateSixDigitCode() string {
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@@ -416,3 +568,50 @@ func generateResetToken() string {
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rand.Read(b)
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return hex.EncodeToString(b)
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}
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// Helper functions for Apple Sign In
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func getEmailFromRequest(reqEmail *string, claimsEmail string) string {
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if reqEmail != nil && *reqEmail != "" {
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return *reqEmail
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}
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return claimsEmail
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}
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func getEmailOrDefault(email string) string {
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if email == "" {
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// Generate a placeholder email for users without one
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return fmt.Sprintf("apple_%s@privaterelay.appleid.com", generateResetToken()[:16])
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}
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return email
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}
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func getStringOrEmpty(s *string) string {
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if s == nil {
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return ""
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}
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return *s
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}
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func isPrivateRelayEmail(email string) bool {
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return strings.HasSuffix(strings.ToLower(email), "@privaterelay.appleid.com")
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}
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func generateUniqueUsername(email string, firstName *string) string {
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// Try using first part of email
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if email != "" && !isPrivateRelayEmail(email) {
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parts := strings.Split(email, "@")
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if len(parts) > 0 && parts[0] != "" {
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// Add random suffix to ensure uniqueness
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return parts[0] + "_" + generateResetToken()[:6]
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}
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}
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// Try using first name
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if firstName != nil && *firstName != "" {
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return strings.ToLower(*firstName) + "_" + generateResetToken()[:6]
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}
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// Fallback to random username
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return "user_" + generateResetToken()[:10]
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}
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