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Todo/.kiro/specs/user-auth-and-sharing/tasks.md
Paul Bailey 534796edd7 feat: implement security enhancements (task 17) 
- Add rate limiting for login, registration, and invitations
- Implement CSRF protection with SameSite cookies and security headers
- Configure secure session cookies with httpOnly and secure flags
- Enhance input sanitization for XSS and injection prevention
- Add comprehensive security tests (41 tests passing)
- Document security enhancements in SECURITY_ENHANCEMENTS.md

Requirements: 9.3, 9.4, 9.5
2025-12-02 01:29:35 +00:00

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Implementation Plan

  • 1. Set up authentication infrastructure

    • Install and configure NextAuth.js v5, bcryptjs, and zod
    • Create auth configuration file with credentials provider
    • Set up environment variables for auth secrets
    • Requirements: 1.1, 2.1

  • 2. Update database schema for multi-user support

    • Add User model with email, passwordHash, and name fields
    • Add Collaborator model for list sharing
    • Add Invitation model for sharing invitations
    • Add ownerId field to List model
    • Add necessary indexes for performance
    • Requirements: 1.1, 4.1, 5.1

  • * 2.1 Write property test for user registration

    • Property 1: Registration creates unique user
    • Validates: Requirements 1.1

  • * 2.2 Write property test for duplicate email rejection

    • Property 2: Duplicate email rejection
    • Validates: Requirements 1.2

  • * 2.3 Write property test for password hashing

    • Property 3: Password hashing on registration
    • Validates: Requirements 1.3

  • 3. Implement user registration functionality

    • Create registration server action with email/password validation
    • Implement password hashing with bcrypt
    • Add email uniqueness check
    • Create session after successful registration
    • Requirements: 1.1, 1.2, 1.3, 1.4, 1.5

  • * 3.1 Write property test for registration session creation

    • Property 4: Registration creates session
    • Validates: Requirements 1.4

  • * 3.2 Write property test for password length validation

    • Property 5: Password length validation
    • Validates: Requirements 1.5

  • 4. Implement authentication functionality

    • Create login server action with credential validation
    • Implement password verification with bcrypt
    • Create session on successful login
    • Handle invalid credentials with appropriate errors
    • Requirements: 2.1, 2.2

  • * 4.1 Write property test for valid credentials

    • Property 6: Valid credentials create session
    • Validates: Requirements 2.1

  • * 4.2 Write property test for invalid credentials

    • Property 7: Invalid credentials rejection
    • Validates: Requirements 2.2

  • 5. Implement session management

    • Configure JWT session strategy in NextAuth
    • Implement session validation middleware
    • Create logout functionality
    • Handle session expiration
    • Requirements: 2.4, 2.5, 3.1, 3.2, 3.4

  • * 5.1 Write property test for session expiration

    • Property 8: Session expiration enforcement
    • Validates: Requirements 2.4

  • * 5.2 Write property test for logout

    • Property 9: Logout terminates session
    • Validates: Requirements 2.5

  • * 5.3 Write property test for secure token generation

    • Property 10: Secure token generation
    • Validates: Requirements 3.1

  • * 5.4 Write property test for session persistence

    • Property 11: Session persistence
    • Validates: Requirements 3.2

  • * 5.5 Write property test for session duration

    • Property 12: Session duration persistence
    • Validates: Requirements 3.4

  • 6. Create authentication UI components

    • Build LoginForm component with email/password inputs
    • Build RegisterForm component with validation
    • Create authentication error display page
    • Add loading states and error handling
    • Requirements: 1.1, 2.1

  • 7. Implement route protection middleware

    • Create Next.js middleware for authentication checks
    • Protect main routes (/, /list/, /profile/)
    • Redirect unauthenticated users to login
    • Requirements: 3.3, 3.5

  • 8. Update list operations for ownership

    • Modify createList to assign ownerId
    • Update getLists to filter by user access
    • Add ownership checks to updateList and deleteList
    • Implement cascade deletion for user account deletion
    • Requirements: 4.1, 4.2, 4.3, 4.5

  • * 8.1 Write property test for list ownership assignment

    • Property 13: List ownership assignment
    • Validates: Requirements 4.1

  • * 8.2 Write property test for list access filtering

    • Property 14: List access filtering
    • Validates: Requirements 4.2, 4.4

  • * 8.3 Write property test for unauthorized access denial

    • Property 15: Unauthorized list access denial
    • Validates: Requirements 4.3

  • * 8.4 Write property test for account deletion cascade

    • Property 16: Account deletion cascades to lists
    • Validates: Requirements 4.5

  • 9. Implement permission utilities

    • Create canAccessList function
    • Create canEditList function
    • Create canDeleteList function
    • Create getPermission function
    • Requirements: 4.3, 6.2, 6.3

  • 10. Update item operations for access control

    • Add access checks to createItem
    • Add access checks to updateItem, deleteItem, toggleItem
    • Enforce editor vs viewer permissions
    • Filter items by list access in queries
    • Requirements: 6.2, 6.3, 9.2

  • * 10.1 Write property test for item access through list permission

    • Property 34: Item access through list permission
    • Validates: Requirements 9.2

  • 11. Implement invitation system

    • Create inviteUserToList server action
    • Create getInvitations server action
    • Create acceptInvitation server action
    • Create declineInvitation server action
    • Add invitation expiration logic
    • Requirements: 5.1, 5.2, 5.3, 8.1, 8.5

  • * 11.1 Write property test for invitation creation

    • Property 17: Invitation creation with unique ID
    • Validates: Requirements 5.1, 6.1

  • * 11.2 Write property test for invitation acceptance

    • Property 18: Invitation acceptance grants access
    • Validates: Requirements 5.2

  • * 11.3 Write property test for invitation decline

    • Property 19: Invitation decline removes record
    • Validates: Requirements 5.3

  • * 11.4 Write property test for invitation visibility

    • Property 30: Invitation visibility
    • Validates: Requirements 8.1

  • * 11.5 Write property test for invitation details

    • Property 31: Invitation details completeness
    • Validates: Requirements 8.2

  • * 11.6 Write property test for invitation removal

    • Property 32: Invitation removal after action
    • Validates: Requirements 8.4

  • * 11.7 Write property test for invitation timestamp

    • Property 33: Invitation timestamp recording
    • Validates: Requirements 8.5

  • 12. Implement collaborator management

    • Create getCollaborators server action
    • Create updateCollaboratorPermission server action
    • Create removeCollaborator server action
    • Add permission level enforcement
    • Requirements: 5.4, 5.5, 6.1, 6.5

  • * 12.1 Write property test for collaborator list

    • Property 20: Collaborator list completeness
    • Validates: Requirements 5.4

  • * 12.2 Write property test for access revocation

    • Property 21: Access revocation enforcement
    • Validates: Requirements 5.5

  • * 12.3 Write property test for editor permissions

    • Property 22: Editor permission allows modifications
    • Validates: Requirements 6.2

  • * 12.4 Write property test for viewer permissions

    • Property 23: Viewer permission prevents modifications
    • Validates: Requirements 6.3, 6.4

  • * 12.5 Write property test for permission updates

    • Property 24: Permission update enforcement
    • Validates: Requirements 6.5

  • 13. Create sharing UI components

    • Build InvitationCard component
    • Build CollaboratorList component
    • Build ShareListModal component
    • Build PermissionBadge component
    • Add invitations page
    • Requirements: 5.1, 5.4, 8.1, 8.2

  • 14. Implement profile management

    • Create profile page and ProfileForm component
    • Implement updateProfile server action
    • Create PasswordChangeForm component
    • Implement updatePassword server action with current password verification
    • Add email update with uniqueness check
    • Requirements: 7.1, 7.2, 7.3, 7.4, 7.5

  • * 14.1 Write property test for profile updates

    • Property 25: Profile update persistence
    • Validates: Requirements 7.1

  • * 14.2 Write property test for password change validation

    • Property 26: Password change requires current password
    • Validates: Requirements 7.2

  • * 14.3 Write property test for password hashing on change

    • Property 27: Password hashing on change
    • Validates: Requirements 7.3

  • * 14.4 Write property test for email uniqueness

    • Property 28: Email uniqueness validation
    • Validates: Requirements 7.4

  • * 14.5 Write property test for profile data exposure

    • Property 29: Profile data exposure protection
    • Validates: Requirements 7.5

  • 15. Update existing components for multi-user

    • Modify ListCard to show sharing indicator
    • Update ListDetailView with share button and permission display
    • Modify ItemForm to disable editing for viewers
    • Update navigation to include profile and invitations links
    • Requirements: 6.3

  • 16. Implement data migration for existing lists

    • Create migration script for existing anonymous lists
    • Add UI for users to claim existing lists on first registration
    • Ensure all lists have an owner after migration
    • Preserve all existing list and item data
    • Requirements: 10.2, 10.3, 10.4, 10.5

  • * 16.1 Write property test for migration data preservation

    • Property 35: Migration data preservation
    • Validates: Requirements 10.3

  • 17. Add security enhancements

    • Implement rate limiting on login attempts
    • Add CSRF protection
    • Implement secure session cookie configuration
    • Add input sanitization for all user inputs
    • Requirements: 9.3, 9.4, 9.5

  • 18. Checkpoint - Ensure all tests pass

    • Ensure all tests pass, ask the user if questions arise.

  • 19. Update PWA service worker for authentication

    • Handle authentication errors in offline mode
    • Cache authentication-related pages appropriately
    • Update manifest if needed
    • Test offline behavior with authentication
    • Requirements: 4.4

  • 20. Final integration and testing

    • Test complete authentication flow end-to-end
    • Test list sharing workflow end-to-end
    • Verify permission enforcement across all operations
    • Test migration process with sample data
    • Verify PWA functionality still works
    • Requirements: All

  • 21. Final Checkpoint - Ensure all tests pass

    • Ensure all tests pass, ask the user if questions arise.
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