Firebase Password Validation allowed regex

Question

I was wondering if anyone knew the official allowed passwords for Firebase's Email and Password Authentication API.

So far I understand that there is

• a minimum of 6 characters required
• a-z allowed
• A-Z allowed
• 0-9 allowed
• special characters allowed ~`!@#$%^&*()-_+=|}]{["':;?/>.<,
• white spaces allowed

If this is the case, would the regex for validation on my side just be {6,} ? (alternatively I could just check the length of the field)

EDIT: I assume it's similar to Google's normal password requirements but only requiring 6 characters instead of 8.

Answer 1

For anyone looking for a regular expression to validate password before sending to firebase.

I suggest to use this pattern as it pass as minimum qualifications! also firebase verify and validate password after you send it too Firebase cloud... so keep it simple.

let pattern: String = "(?=.*[0-9a-zA-Z]).{6,}"

1. Minimum 6 character: {6,}
2. Any character allowed: (?=.*[0-9a-zA-Z])

Remember, it is just the minimum requirements for a valid password, you can choose how strong the password should be based on your software.

Answer 2

Your understanding is correct - the only requirement is a minimum of 6 chars.

However, if you are building Android/iOS apps, I would suggest -not- to hardcode the validation logic in your app, since the new user signup request is handled by Firebase Auth server.