Files
Sovran_SystemsOS/modules/credentials.nix
T
naturallaw777 4a25ef24d1 password & keyring cleanup: one password, one truth, no prompts
The Hub, GDM and sudo now share /etc/shadow as the single source of
truth. /var/lib/secrets/{free,root}-password become root-only display
copies, written only by system_password.py and verified against shadow
before being shown. The GNOME login keyring is decoupled from the login
password (blank master password, pam_gnome_keyring off), so nothing
needs re-keying or wiping when the password changes and the keyring
never pops an unlock prompt.

- add app/sovran_systemsos_web/system_password.py: the single module
  that verifies / sets / displays the free + root passwords and drives
  the legacy-migration onboarding step (same endpoints and UI)
- add modules/password-model.nix: PAM gnome-keyring off, blank
  login.keyring seed with a one-time migration of old encrypted
  keyrings, first-boot-only password application (no more boot-revert),
  LIBCRYPT for the Hub
- server.py: login verifies against shadow and heals stale display
  copies; change-password takes the current password; security reset
  sets both passwords through the same writer (root is shown as a
  password again, not a hash); all keyring wipes removed
- credentials.nix: drop root-password-setup, free-password-setup and
  free-password-migration (replaced by password-model.nix) and the
  keyring wipe in change-free-password
- configuration.nix: drop enableGnomeKeyring and the keyring tmpfiles
  hack (replaced by password-model.nix)
- service-detail.js: "Current password" field; credentials changed
  outside the Hub render with a hint instead of a stale value

Installed machines keep their exact passwords: the first-boot services
no-op once an account has a real hash, and the upgrade never writes
/etc/shadow. The legacy-migration onboarding step and "reset all
passwords" keep working.
2026-10-16 12:25:16 -05:00

77 lines
2.9 KiB
Nix

{ config, pkgs, lib, ... }:
let
# ── Helper: change 'free' password and save it ─────────────
change-free-password = pkgs.writeShellScriptBin "change-free-password" ''
set -euo pipefail
SECRET_FILE="/var/lib/secrets/free-password"
if [ "$(id -u)" -ne 0 ]; then
echo "Error: must be run as root (use sudo)." >&2
exit 1
fi
echo -n "New password for free: "
read -rs NEW_PASS
echo
echo -n "Confirm password: "
read -rs CONFIRM
echo
if [ "$NEW_PASS" != "$CONFIRM" ]; then
echo "Passwords do not match." >&2
exit 1
fi
if [ -z "$NEW_PASS" ]; then
echo "Password cannot be empty." >&2
exit 1
fi
echo "free:$NEW_PASS" | ${pkgs.shadow}/bin/chpasswd
mkdir -p /var/lib/secrets
echo "$NEW_PASS" > "$SECRET_FILE"
chmod 600 "$SECRET_FILE"
echo "Password for 'free' updated and saved."
'';
in
{
# ── Make helper available system-wide ───────────────────────
environment.systemPackages = [ change-free-password ];
# ── Shell aliases: intercept 'passwd free' ─────────────────
programs.bash.interactiveShellInit = ''
passwd() {
if [ "$1" = "free" ]; then
echo ""
echo "╔══════════════════════════════════════════════════════╗"
echo "║ ⚠ Use 'sudo change-free-password' instead. ║"
echo "║ ║"
echo "║ 'passwd free' only updates /etc/shadow. ║"
echo "║ The Hub credentials view will NOT be updated. ║"
echo "╚══════════════════════════════════════════════════════╝"
echo ""
return 1
fi
command passwd "$@"
}
'';
programs.fish.interactiveShellInit = ''
function passwd --wraps passwd
if test "$argv[1]" = "free"
echo ""
echo "╔══════════════════════════════════════════════════════╗"
echo "║ ⚠ Use 'sudo change-free-password' instead. ║"
echo "║ ║"
echo "║ 'passwd free' only updates /etc/shadow. ║"
echo "║ The Hub credentials view will NOT be updated. ║"
echo "╚════════════════════════════��═════════════════════════╝"
echo ""
return 1
end
command passwd $argv
end
'';
}