548 lines
24 KiB
Bash
Executable File
548 lines
24 KiB
Bash
Executable File
#!/usr/bin/env bash
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# ansipa-enforce-policies.sh — enforce FreeIPA host-group-driven policies on this client.
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#
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# Policies are idempotent and reversible: joining a group applies the policy;
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# leaving the group removes it on the next run (every 30 min via systemd timer).
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#
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# Host-group naming conventions (device policies — applied to the whole machine):
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# policy-daemon-enable-<unit> Ensure <unit> is enabled and running (systemctl enable --now).
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# Leaving the group reverts: service is disabled and stopped.
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# policy-daemon-disable-<unit> Ensure <unit> is disabled and stopped (systemctl disable --now).
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# Leaving the group reverts: service is re-enabled and started.
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# <unit> may omit the .service suffix; all systemd unit types work.
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# If a unit appears in both enable and disable groups it is skipped.
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# policy-timeshift-backup Enforce a daily Timeshift snapshot (requires timeshift installed)
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# policy-security-scan Enforce daily ClamAV + rkhunter + chkrootkit scans
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# policy-scan-notify (see User-group section below — treated as a user group)
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# no_local_users Lock passwords for root and all local users (UID >= 1000) so
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# that only FreeIPA domain accounts with centrally-managed sudo
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# rules can authenticate and gain elevated privileges.
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# Leaving the group reverts: every account locked by this policy
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# is unlocked on the next run.
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# local_sudo_<username> Grant <username> full sudo on this specific device by adding
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# them to the local sudoers drop-in. Leaving the group removes
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# the drop-in on the next run.
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#
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# User-group naming conventions (per-user policies — follow the user across devices):
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# policy-block-binary-<name> Prevent members of this FreeIPA user group from running <name>
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# on any enrolled host. Use __ in place of . to support Flatpak
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# app IDs (e.g. policy-block-binary-org__gimp__Gimp blocks the
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# Flatpak org.gimp.Gimp). Enforced via a PATH-priority wrapper
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# that checks group membership at runtime via SSSD/id(1).
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# Removing the user group from FreeIPA reverts the wrapper.
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# policy-scan-notify Members receive scan alert notifications on every enrolled device
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# they log into. The fetch-alerts timer is installed fleet-wide
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# when the group exists; the notification daemon starts on login
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# only for group members (checked via id(1) / SSSD).
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# Deleting the IPA user group removes the timer and profile.d
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# snippet on the next enforcer run.
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#
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# Notes:
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# - Install scan tools first: add the host to ansipa-module-anti-malware.
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# - Configure Timeshift (type + target device) before enabling policy-timeshift-backup.
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set -euo pipefail
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LOG_TAG="ansipa-policies"
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STATE_DIR="/var/lib/ansipa-policies"
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BLOCK_DIR="/usr/local/bin"
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CRON_DIR="/etc/cron.d"
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log() { echo "[$LOG_TAG] $*"; logger -t "$LOG_TAG" "$*" 2>/dev/null || true; }
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warn() { echo "[$LOG_TAG][WARN] $*" >&2; logger -t "$LOG_TAG" "WARN: $*" 2>/dev/null || true; }
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HOST_FQDN=$(hostname -f 2>/dev/null || hostname)
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if ! command -v ipa &>/dev/null; then
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warn "ipa command not found — host not enrolled in FreeIPA. Exiting."
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exit 0
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fi
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kinit -k "host/$HOST_FQDN" &>/dev/null || true
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mkdir -p "$STATE_DIR"
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# ── Fetch host group membership ───────────────────────────────────────────────
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RAW_GROUPS=$(ipa host-show "$HOST_FQDN" --all 2>/dev/null \
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| grep -i "Member of host-groups:" | sed 's/.*: //' || true)
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# ── Parse active host-group (device) policies ─────────────────────────────────
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ACTIVE_DAEMON_ENABLE=()
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ACTIVE_DAEMON_DISABLE=()
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ACTIVE_LOCAL_SUDO_USERS=()
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WANT_TIMESHIFT_BACKUP=false
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WANT_SECURITY_SCAN=false
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WANT_SCAN_NOTIFY=false
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WANT_NO_LOCAL_USERS=false
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if [[ -n "$RAW_GROUPS" ]]; then
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while IFS=',' read -ra GRP_ARRAY; do
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for g in "${GRP_ARRAY[@]}"; do
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g="${g// /}"
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case "$g" in
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policy-daemon-enable-*) ACTIVE_DAEMON_ENABLE+=("${g#policy-daemon-enable-}") ;;
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policy-daemon-disable-*) ACTIVE_DAEMON_DISABLE+=("${g#policy-daemon-disable-}") ;;
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policy-timeshift-backup) WANT_TIMESHIFT_BACKUP=true ;;
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policy-security-scan) WANT_SECURITY_SCAN=true ;;
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no_local_users) WANT_NO_LOCAL_USERS=true ;;
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local_sudo_*) ACTIVE_LOCAL_SUDO_USERS+=("${g#local_sudo_}") ;;
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esac
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done
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done <<< "$RAW_GROUPS"
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fi
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# ── Fetch user-group-based binary block policies from FreeIPA ─────────────────
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# policy-block-binary-<name> groups are FreeIPA *user* groups — membership follows
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# the user to every enrolled host rather than being tied to a device.
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ACTIVE_BLOCK_BINARIES=()
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ACTIVE_BLOCK_IPA_GROUPS=()
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_BLOCK_LIST=$(ipa group-find --pkey-only 2>/dev/null \
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| awk '/Group name:/ {print $NF}' \
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| grep "^policy-block-binary-" | sort -u || true)
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while IFS= read -r _grp; do
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[[ -z "$_grp" ]] && continue
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_raw="${_grp#policy-block-binary-}"
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ACTIVE_BLOCK_BINARIES+=("${_raw//__/.}")
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ACTIVE_BLOCK_IPA_GROUPS+=("$_grp")
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done <<< "$_BLOCK_LIST"
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unset _BLOCK_LIST _grp _raw
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# ── Fetch user-group-based scan-notify policy from FreeIPA ────────────────────
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# policy-scan-notify is a FreeIPA *user* group — membership follows the user to
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# every enrolled host. Install the fetch-alerts timer on any device where the
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# group exists; the profile.d snippet gates daemon start on runtime membership.
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if ipa group-show policy-scan-notify >/dev/null 2>&1; then
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WANT_SCAN_NOTIFY=true
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fi
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log "Device policies — daemon-enable: ${ACTIVE_DAEMON_ENABLE[*]:-none}" \
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"| daemon-disable: ${ACTIVE_DAEMON_DISABLE[*]:-none}" \
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"| timeshift-backup: $WANT_TIMESHIFT_BACKUP | security-scan: $WANT_SECURITY_SCAN" \
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"| no-local-users: $WANT_NO_LOCAL_USERS | local-sudo: ${ACTIVE_LOCAL_SUDO_USERS[*]:-none}"
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log "User policies — block-binary: ${ACTIVE_BLOCK_BINARIES[*]:-none}" \
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"| scan-notify: $WANT_SCAN_NOTIFY"
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# ── Helpers ───────────────────────────────────────────────────────────────────
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_in_block_list() {
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local needle="$1"
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for b in "${ACTIVE_BLOCK_BINARIES[@]}"; do
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[[ "$b" == "$needle" ]] && return 0
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done
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return 1
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}
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# ── Binary blocking (user-based) ──────────────────────────────────────────────
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# A PATH-priority wrapper is installed in /usr/local/bin/ for every binary named
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# by a policy-block-binary-* FreeIPA *user* group. The wrapper checks the
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# caller's group membership at runtime (via id + SSSD) and only blocks members;
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# non-members are transparently passed through to the real binary.
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# __ in the group suffix decodes to . so Flatpak app IDs are fully supported.
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# Removing the IPA user group causes the wrapper to be cleaned up on the next run.
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BLOCK_STATE="$STATE_DIR/blocked-binaries"
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[[ -f "$BLOCK_STATE" ]] || touch "$BLOCK_STATE"
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for _idx in "${!ACTIVE_BLOCK_BINARIES[@]}"; do
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BIN="${ACTIVE_BLOCK_BINARIES[$_idx]}"
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IPA_GRP="${ACTIVE_BLOCK_IPA_GROUPS[$_idx]}"
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WRAPPER="$BLOCK_DIR/$BIN"
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# Write (or refresh) the wrapper when it is absent, not ours, or the group name changed.
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if [[ ! -f "$WRAPPER" ]] \
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|| ! grep -q "blocked by ansipa policy" "$WRAPPER" 2>/dev/null \
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|| ! grep -qF "$IPA_GRP" "$WRAPPER" 2>/dev/null; then
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log "Installing user-aware block wrapper: $BIN (group: $IPA_GRP)"
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cat > "$WRAPPER" <<WRAPPER
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#!/bin/bash
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# blocked by ansipa policy (user-based)
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if id -Gn 2>/dev/null | tr ' ' '\n' | grep -qxF "${IPA_GRP}"; then
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echo "[ansipa-policies] '${BIN}' is blocked by system policy for your account." >&2
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exit 1
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fi
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_real=\$(PATH="/usr/bin:/usr/sbin:/bin:/sbin:/usr/local/sbin:/opt/bin:/var/lib/flatpak/exports/bin:/usr/share/flatpak/exports/bin" command -v "${BIN}" 2>/dev/null)
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[[ -n "\$_real" ]] && exec "\$_real" "\$@"
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command -v flatpak &>/dev/null && exec flatpak run "${BIN}" "\$@" 2>/dev/null
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echo "${BIN}: command not found" >&2
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exit 127
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WRAPPER
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chmod 755 "$WRAPPER"
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fi
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done
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unset _idx
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# Remove wrappers whose IPA user group no longer exists.
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while IFS= read -r OLD_BIN; do
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[[ -z "$OLD_BIN" ]] && continue
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if ! _in_block_list "$OLD_BIN"; then
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WRAPPER="$BLOCK_DIR/$OLD_BIN"
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if [[ -f "$WRAPPER" ]] && grep -q "blocked by ansipa policy" "$WRAPPER" 2>/dev/null; then
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rm -f "$WRAPPER"
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log "Removed binary block wrapper: $OLD_BIN"
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fi
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fi
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done < "$BLOCK_STATE"
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# Persist current blocked list.
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if [[ ${#ACTIVE_BLOCK_BINARIES[@]} -gt 0 ]]; then
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printf '%s\n' "${ACTIVE_BLOCK_BINARIES[@]}" | sort -u > "$BLOCK_STATE"
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else
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> "$BLOCK_STATE"
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fi
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# ── Timeshift daily backup ─────────────────────────────────────────────────────
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TIMESHIFT_CRON="$CRON_DIR/ansipa-timeshift-backup"
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if [[ "$WANT_TIMESHIFT_BACKUP" == true ]]; then
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if [[ ! -f "$TIMESHIFT_CRON" ]]; then
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if ! command -v timeshift &>/dev/null; then
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warn "timeshift not found — add host to ansipa-module-timeshift first. Cron will be installed anyway."
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fi
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log "Enabling daily Timeshift backups"
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cat > "$TIMESHIFT_CRON" <<'CRON'
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# ansipa-policy-timeshift-backup: managed by ansipa-enforce-policies — do not edit manually.
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# Timeshift must be configured on this host (type + target device) before snapshots work.
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0 3 * * * root /usr/bin/timeshift --create --comments "ansipa-daily" --tags D 2>&1 | logger -t timeshift-backup
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CRON
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chmod 644 "$TIMESHIFT_CRON"
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fi
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else
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if [[ -f "$TIMESHIFT_CRON" ]]; then
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rm -f "$TIMESHIFT_CRON"
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log "Removed Timeshift backup cron (host left policy-timeshift-backup group)"
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fi
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fi
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# ── Security scan ─────────────────────────────────────────────────────────────
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SCAN_CRON="$CRON_DIR/ansipa-security-scan"
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SCAN_SCRIPT="/usr/local/bin/ansipa-security-scan.sh"
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if [[ "$WANT_SECURITY_SCAN" == true ]]; then
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# (Re-)write the scan script so it stays current with this version of the enforcer.
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cat > "$SCAN_SCRIPT" <<'SCAN'
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#!/bin/bash
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# ansipa-security-scan — daily ClamAV / rkhunter / chkrootkit run + SMB upload.
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# Managed by ansipa-enforce-policies — do not edit manually.
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LOG=/var/log/ansipa-security-scan.log
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HOSTNAME=$(hostname -f 2>/dev/null || hostname)
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DATE=$(date +%Y-%m-%d)
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{
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echo "=== ansipa-security-scan: $DATE $HOSTNAME ==="
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if command -v freshclam &>/dev/null; then
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freshclam --quiet 2>/dev/null || true
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fi
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if command -v clamscan &>/dev/null; then
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clamscan -r --infected --quiet /home /etc /tmp /var/tmp 2>/dev/null || true
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fi
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if command -v rkhunter &>/dev/null; then
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rkhunter --update --quiet 2>/dev/null || true
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rkhunter --check --skip-keypress --quiet 2>/dev/null || true
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fi
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if command -v chkrootkit &>/dev/null; then
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chkrootkit 2>/dev/null || true
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fi
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echo "=== scan complete ==="
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} >> "$LOG" 2>&1
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# ── Upload to server SMB share ────────────────────────────────────────────────
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IPA_SERVER=$(awk '/^server[[:space:]]*=/{print $3}' /etc/ipa/default.conf 2>/dev/null || echo "")
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if [[ -n "$IPA_SERVER" ]] && [[ -f /etc/ansipa-smb.creds ]] && command -v smbclient &>/dev/null; then
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# Create host archive dir (mkdir is idempotent; errors suppressed).
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smbclient "//$IPA_SERVER/ansipa-scans" -A /etc/ansipa-smb.creds \
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-c "mkdir archive; mkdir archive\\$HOSTNAME; put $LOG archive\\$HOSTNAME\\$DATE.log" \
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>> "$LOG" 2>&1 \
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&& echo "[ansipa] Scan results uploaded to $IPA_SERVER/ansipa-scans/archive/$HOSTNAME/$DATE.log" >> "$LOG" \
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|| echo "[ansipa][WARN] SMB upload failed — results remain local at $LOG" >> "$LOG"
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else
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echo "[ansipa] SMB upload skipped (no credentials or smbclient not found)." >> "$LOG"
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fi
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SCAN
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chmod 755 "$SCAN_SCRIPT"
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if [[ ! -f "$SCAN_CRON" ]]; then
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log "Enabling daily security scans (ClamAV / rkhunter / chkrootkit)"
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cat > "$SCAN_CRON" <<'CRON'
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# ansipa-policy-security-scan: managed by ansipa-enforce-policies — do not edit manually.
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# Install scan tools by adding the host to the ansipa-module-anti-malware group.
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0 2 * * * root /usr/local/bin/ansipa-security-scan.sh
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CRON
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chmod 644 "$SCAN_CRON"
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fi
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else
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if [[ -f "$SCAN_CRON" ]]; then
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rm -f "$SCAN_CRON"
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rm -f "$SCAN_SCRIPT"
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log "Removed security scan policy (host left policy-security-scan group)"
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fi
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fi
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# ── Scan notification daemon ──────────────────────────────────────────────────
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# policy-scan-notify is a FreeIPA *user* group (not a host group). The fetch-
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# alerts timer runs fleet-wide on any host where the group exists; the profile.d
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# snippet starts the notification daemon on login only for group members
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# (checked via id(1) / SSSD so no IPA query is needed at login time).
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# - Root timer (every 10 min): ansipa-fetch-alerts.sh downloads alerts from the
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# server SMB share and places them in ~/administration/<hostname>/ per active user.
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# - profile.d snippet: starts ansipa-scan-notify.sh as a user daemon on login;
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# the daemon sends notify-send every 10 min while *.alert files remain.
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# Deleting a file from ~/administration/ counts as acknowledgment.
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#
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# Requires: ansipa-fetch-alerts.sh and ansipa-scan-notify.sh deployed by
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# deploy-ansipa-policies.yml (static scripts — not written inline here).
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FETCH_SVC="/etc/systemd/system/ansipa-fetch-alerts.service"
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FETCH_TIMER="/etc/systemd/system/ansipa-fetch-alerts.timer"
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NOTIFY_PROFILED="/etc/profile.d/ansipa-notify.sh"
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if [[ "$WANT_SCAN_NOTIFY" == true ]]; then
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if [[ ! -x /usr/local/bin/ansipa-fetch-alerts.sh ]]; then
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warn "ansipa-fetch-alerts.sh not found — run deploy-ansipa-policies.yml first."
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fi
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if [[ ! -f "$FETCH_SVC" ]]; then
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log "Installing ansipa-fetch-alerts systemd service + timer"
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cat > "$FETCH_SVC" <<'UNIT'
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[Unit]
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Description=Fetch Ansipa security alerts from the server SMB share
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After=network-online.target sssd.service
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Wants=network-online.target
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[Service]
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Type=oneshot
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ExecStart=/usr/local/bin/ansipa-fetch-alerts.sh
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StandardOutput=journal
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StandardError=journal
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UNIT
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cat > "$FETCH_TIMER" <<'UNIT'
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[Unit]
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Description=Periodic ansipa security alert fetch
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[Timer]
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OnBootSec=2min
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OnUnitActiveSec=10min
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[Install]
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WantedBy=timers.target
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UNIT
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systemctl daemon-reload
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systemctl enable --now ansipa-fetch-alerts.timer
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log "ansipa-fetch-alerts.timer enabled"
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fi
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if [[ ! -f "$NOTIFY_PROFILED" ]]; then
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log "Installing /etc/profile.d/ansipa-notify.sh"
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cat > "$NOTIFY_PROFILED" <<'PROFILED'
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# ansipa-notify: launch the scan alert notification daemon on login for
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# members of the policy-scan-notify FreeIPA user group.
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# Managed by ansipa-enforce-policies — do not edit manually.
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_NOTIFY_DAEMON=/usr/local/bin/ansipa-scan-notify.sh
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if [[ -x "$_NOTIFY_DAEMON" ]] && \
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id -nG 2>/dev/null | grep -qw "policy-scan-notify" && \
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! pgrep -u "$(id -u)" -f "ansipa-scan-notify" >/dev/null 2>&1; then
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"$_NOTIFY_DAEMON" &
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disown
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fi
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unset _NOTIFY_DAEMON
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PROFILED
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chmod 644 "$NOTIFY_PROFILED"
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fi
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else
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if [[ -f "$FETCH_TIMER" ]]; then
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systemctl disable --now ansipa-fetch-alerts.timer 2>/dev/null || true
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rm -f "$FETCH_SVC" "$FETCH_TIMER"
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systemctl daemon-reload
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log "Removed ansipa-fetch-alerts timer (policy-scan-notify user group no longer exists)"
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fi
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if [[ -f "$NOTIFY_PROFILED" ]]; then
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rm -f "$NOTIFY_PROFILED"
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log "Removed /etc/profile.d/ansipa-notify.sh"
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fi
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fi
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# ── Daemon enable / disable ───────────────────────────────────────────────────
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# policy-daemon-enable-<unit>: ensure the unit is enabled and running.
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# Leaving the group reverts: unit is disabled and stopped.
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# policy-daemon-disable-<unit>: ensure the unit is disabled and stopped.
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# Leaving the group reverts: unit is re-enabled and started.
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# <unit> may omit the .service suffix; systemd accepts both forms.
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# Conflicts (unit in both lists): logged as a warning, unit is left untouched.
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DAEMON_ENABLE_STATE="$STATE_DIR/daemon-enabled"
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DAEMON_DISABLE_STATE="$STATE_DIR/daemon-disabled"
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[[ -f "$DAEMON_ENABLE_STATE" ]] || touch "$DAEMON_ENABLE_STATE"
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[[ -f "$DAEMON_DISABLE_STATE" ]] || touch "$DAEMON_DISABLE_STATE"
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# Append .service only when the name has no unit-type suffix already.
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_svc_unit() { [[ "$1" == *.* ]] && echo "$1" || echo "${1}.service"; }
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_in_enable_list() { local n="$1"; for s in "${ACTIVE_DAEMON_ENABLE[@]}"; do [[ "$s" == "$n" ]] && return 0; done; return 1; }
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_in_disable_list() { local n="$1"; for s in "${ACTIVE_DAEMON_DISABLE[@]}"; do [[ "$s" == "$n" ]] && return 0; done; return 1; }
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# Apply enable policies
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for _SVC in "${ACTIVE_DAEMON_ENABLE[@]}"; do
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if _in_disable_list "$_SVC"; then
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warn "Conflict: '$_SVC' is in both daemon-enable and daemon-disable groups — skipped"
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continue
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fi
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_UNIT=$(_svc_unit "$_SVC")
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_EN=$(systemctl is-enabled "$_UNIT" 2>/dev/null || echo "not-found")
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_AC=$(systemctl is-active "$_UNIT" 2>/dev/null || echo "inactive")
|
|
if [[ "$_EN" != "enabled" || "$_AC" != "active" ]]; then
|
|
log "Enabling service: $_UNIT (enabled=$_EN active=$_AC)"
|
|
systemctl enable --now "$_UNIT" 2>/dev/null \
|
|
&& log "Service enabled: $_UNIT" \
|
|
|| warn "Failed to enable $_UNIT — unit may not exist on this host"
|
|
fi
|
|
done
|
|
|
|
# Apply disable policies
|
|
for _SVC in "${ACTIVE_DAEMON_DISABLE[@]}"; do
|
|
if _in_enable_list "$_SVC"; then
|
|
continue # conflict already warned above
|
|
fi
|
|
_UNIT=$(_svc_unit "$_SVC")
|
|
_EN=$(systemctl is-enabled "$_UNIT" 2>/dev/null || echo "not-found")
|
|
_AC=$(systemctl is-active "$_UNIT" 2>/dev/null || echo "inactive")
|
|
if [[ "$_EN" == "enabled" || "$_AC" == "active" ]]; then
|
|
log "Disabling service: $_UNIT (enabled=$_EN active=$_AC)"
|
|
systemctl disable --now "$_UNIT" 2>/dev/null \
|
|
&& log "Service disabled: $_UNIT" \
|
|
|| warn "Failed to disable $_UNIT — unit may not exist on this host"
|
|
fi
|
|
done
|
|
|
|
# Revert: host left a daemon-enable group → disable and stop the service
|
|
while IFS= read -r _OLD; do
|
|
[[ -z "$_OLD" ]] && continue
|
|
if ! _in_enable_list "$_OLD"; then
|
|
_UNIT=$(_svc_unit "$_OLD")
|
|
log "Reverting enable policy: disabling $_UNIT (host left daemon-enable group)"
|
|
systemctl disable --now "$_UNIT" 2>/dev/null \
|
|
|| warn "Failed to disable (revert) $_UNIT"
|
|
fi
|
|
done < "$DAEMON_ENABLE_STATE"
|
|
|
|
# Revert: host left a daemon-disable group → re-enable and start the service
|
|
while IFS= read -r _OLD; do
|
|
[[ -z "$_OLD" ]] && continue
|
|
if ! _in_disable_list "$_OLD"; then
|
|
_UNIT=$(_svc_unit "$_OLD")
|
|
log "Reverting disable policy: enabling $_UNIT (host left daemon-disable group)"
|
|
systemctl enable --now "$_UNIT" 2>/dev/null \
|
|
|| warn "Failed to enable (revert) $_UNIT"
|
|
fi
|
|
done < "$DAEMON_DISABLE_STATE"
|
|
|
|
# Persist current state
|
|
if [[ ${#ACTIVE_DAEMON_ENABLE[@]} -gt 0 ]]; then
|
|
printf '%s\n' "${ACTIVE_DAEMON_ENABLE[@]}" | sort -u > "$DAEMON_ENABLE_STATE"
|
|
else
|
|
> "$DAEMON_ENABLE_STATE"
|
|
fi
|
|
if [[ ${#ACTIVE_DAEMON_DISABLE[@]} -gt 0 ]]; then
|
|
printf '%s\n' "${ACTIVE_DAEMON_DISABLE[@]}" | sort -u > "$DAEMON_DISABLE_STATE"
|
|
else
|
|
> "$DAEMON_DISABLE_STATE"
|
|
fi
|
|
|
|
# ── Per-device local sudo grants ──────────────────────────────────────────────
|
|
# local_sudo_<username>: write a sudoers drop-in granting <username> full sudo on
|
|
# this specific device. The drop-in is removed when the host leaves the group.
|
|
|
|
LOCAL_SUDO_DIR="/etc/sudoers.d"
|
|
LOCAL_SUDO_STATE="$STATE_DIR/local-sudo-users"
|
|
[[ -f "$LOCAL_SUDO_STATE" ]] || touch "$LOCAL_SUDO_STATE"
|
|
|
|
for _USER in "${ACTIVE_LOCAL_SUDO_USERS[@]}"; do
|
|
_DROPIN="$LOCAL_SUDO_DIR/ansipa-local-sudo-${_USER}"
|
|
if [[ ! -f "$_DROPIN" ]]; then
|
|
log "Granting local sudo to $_USER on this device"
|
|
echo "$_USER ALL=(ALL) ALL" > "$_DROPIN"
|
|
chmod 440 "$_DROPIN"
|
|
fi
|
|
grep -qxF "$_USER" "$LOCAL_SUDO_STATE" 2>/dev/null || echo "$_USER" >> "$LOCAL_SUDO_STATE"
|
|
done
|
|
|
|
# Revoke sudo for users no longer in any active local_sudo_* group.
|
|
while IFS= read -r _OLD_USER; do
|
|
[[ -z "$_OLD_USER" ]] && continue
|
|
_still_active=false
|
|
for _U in "${ACTIVE_LOCAL_SUDO_USERS[@]}"; do
|
|
[[ "$_U" == "$_OLD_USER" ]] && _still_active=true && break
|
|
done
|
|
if [[ "$_still_active" == false ]]; then
|
|
_DROPIN="$LOCAL_SUDO_DIR/ansipa-local-sudo-${_OLD_USER}"
|
|
if [[ -f "$_DROPIN" ]]; then
|
|
rm -f "$_DROPIN"
|
|
log "Revoked local sudo for $_OLD_USER (host left local_sudo_$_OLD_USER group)"
|
|
fi
|
|
fi
|
|
done < "$LOCAL_SUDO_STATE"
|
|
|
|
# Persist current local sudo users.
|
|
if [[ ${#ACTIVE_LOCAL_SUDO_USERS[@]} -gt 0 ]]; then
|
|
printf '%s\n' "${ACTIVE_LOCAL_SUDO_USERS[@]}" | sort -u > "$LOCAL_SUDO_STATE"
|
|
else
|
|
> "$LOCAL_SUDO_STATE"
|
|
fi
|
|
unset _USER _DROPIN _OLD_USER _still_active _U
|
|
|
|
# ── No-local-users policy ──────────────────────────────────────────────────────
|
|
# no_local_users: lock the passwords of root and all local users (UID >= 1000)
|
|
# so that only FreeIPA domain accounts with centrally-managed sudo rules can
|
|
# authenticate and gain elevated privileges.
|
|
# Leaving the group reverts: every account locked by this policy is unlocked.
|
|
|
|
NO_LOCAL_USERS_STATE="$STATE_DIR/no-local-users"
|
|
|
|
_apply_no_local_users() {
|
|
log "Applying no_local_users policy — locking local account passwords"
|
|
[[ -f "$NO_LOCAL_USERS_STATE" ]] || touch "$NO_LOCAL_USERS_STATE"
|
|
|
|
while IFS=: read -r uname _ uid _; do
|
|
[[ "$uid" =~ ^[0-9]+$ ]] || continue
|
|
{ [[ "$uid" == "0" ]] || [[ "$uid" -ge 1000 ]]; } || continue
|
|
|
|
# Skip accounts already tracked (locked on a previous run)
|
|
grep -qxF "$uname" "$NO_LOCAL_USERS_STATE" 2>/dev/null && continue
|
|
|
|
# Lock only accounts that currently have a real (unlocked) password hash
|
|
local hash
|
|
hash=$(getent shadow "$uname" 2>/dev/null | cut -d: -f2 || true)
|
|
[[ -z "$hash" || "$hash" == '!'* || "$hash" == '*'* ]] && continue
|
|
|
|
if passwd -l "$uname" &>/dev/null; then
|
|
echo "$uname" >> "$NO_LOCAL_USERS_STATE"
|
|
log "Locked local account: $uname"
|
|
else
|
|
warn "Failed to lock local account: $uname"
|
|
fi
|
|
done < /etc/passwd
|
|
}
|
|
|
|
_revert_no_local_users() {
|
|
[[ -f "$NO_LOCAL_USERS_STATE" ]] || return 0
|
|
log "Reverting no_local_users policy — unlocking previously locked accounts"
|
|
while IFS= read -r uname; do
|
|
[[ -z "$uname" ]] && continue
|
|
if passwd -u "$uname" &>/dev/null; then
|
|
log "Unlocked local account: $uname"
|
|
else
|
|
warn "Failed to unlock local account: $uname (may have been removed)"
|
|
fi
|
|
done < "$NO_LOCAL_USERS_STATE"
|
|
> "$NO_LOCAL_USERS_STATE"
|
|
}
|
|
|
|
if [[ "$WANT_NO_LOCAL_USERS" == true ]]; then
|
|
_apply_no_local_users
|
|
else
|
|
if [[ -f "$NO_LOCAL_USERS_STATE" ]] && [[ -s "$NO_LOCAL_USERS_STATE" ]]; then
|
|
_revert_no_local_users
|
|
fi
|
|
fi
|
|
|
|
log "Policy enforcement complete."
|