Validate signup email and password strength #155

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thatguygriff merged 1 commits from feature/150-signup-credential-validation into main 2026-07-30 01:27:05 +00:00

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Author	SHA1	Message	Date
thatguygriffandClaude Opus 5	b5b9a7ac54	Validate signup email and password strength ... The password was only ever checked for length. It is now checked on both sides, with each side doing the job it can actually do. The browser scores it with zxcvbn, through WordPress's own password-strength-meter script rather than a second opinion of our own, and refuses to submit below "medium". That is the nuanced test — it knows Tr0ub4dor&3 is weaker than it looks — but it is advice a client can decline to take. Auth\PasswordPolicy runs on the server and is the rule that holds. It does not try to reproduce a strength score in PHP; it rejects the categorically bad, which is what a server can check without shipping a dictionary: too short, a well-known leaked password, fewer than four distinct characters, or the user's own name or email inside it. No composition rules — NIST advises against them, and they mostly produce predictable substitutions. Both thresholds come from the same two constants, handed to JavaScript by wp_localize_script, so the sides cannot drift into disagreeing about what was accepted. The verdict is attached to the field with setCustomValidity() rather than by disabling a button. The form has up to three submits plus a "Next" that already gates on checkValidity(), and an invalid field stops all of them without any of them needing to know why. Email validation moved ahead of the password check, since the password is now checked against the email. A blank form therefore reports the email first, which also matches the order the fields appear in. Verified the browser half against a controllable scorer: each score band blocks or allows as intended, the identity list reaches the meter, and the gate stays open while zxcvbn's dictionary is still loading — the server covers that window. Closes #150 Co-Authored-By: Claude Opus 5 <[email protected]>	2026-07-29 22:13:31 -03:00