feat(security): add altcha proof-of-work CAPTCHA to all sensitive forms

Integrate go-altcha to protect login, change password, lost password,
and reset password forms against automated submissions. Serves the
altcha widget JS from the embedded library, exposes a challenge
endpoint, validates responses server-side with replay prevention, and
updates the CSP to allow self-hosted scripts and WebAssembly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
nemunaire 2026-03-06 15:24:59 +07:00
commit 1e1888625d
14 changed files with 70 additions and 1 deletions

View file

@ -53,6 +53,12 @@ func changePassword(w http.ResponseWriter, r *http.Request) {
return
}
if !validateAltcha(r) {
csrfToken, _ := setCSRFToken(w)
displayTmplError(w, http.StatusForbidden, "change.html", map[string]interface{}{"error": "Invalid or missing altcha response. Please try again.", "csrf_token": csrfToken})
return
}
renderError := func(status int, msg string) {
csrfToken, _ := setCSRFToken(w)
displayTmplError(w, status, "change.html", map[string]interface{}{"error": msg, "csrf_token": csrfToken})