82 lines
3.5 KiB
Bash
82 lines
3.5 KiB
Bash
#!/usr/bin/env bash
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# policy: usr_ctl_wifi — grant specific IPA users the ability to modify this
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# device's Wi-Fi NetworkManager connections (SSID, PSK/security, etc.). Kept
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# as its own group deliberately separate from usr_ctl_netman (wired IP/gateway
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# control) — a user can be in either, both, or neither.
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#
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# Mechanism: identical to usr_ctl_netman but filtered to ONLY Wi-Fi
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# connections — adds the member to `connection.permissions` on every existing
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# Wi-Fi connection, relying on NetworkManager's own
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# org.freedesktop.NetworkManager.settings.modify.own polkit rule (allowed for
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# local users by default) to let them edit/activate those connections without
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# a password. Wired/other connections are left completely untouched.
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#
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# Requires: NetworkManager (nmcli) on the client.
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# Note: applies to connections that exist at enforcement time; a brand-new
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# Wi-Fi connection created afterwards is picked up on the next 30-min tick.
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WIFI_STATE="$STATE_DIR/wifi-acl-users"
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[[ -f "$WIFI_STATE" ]] || touch "$WIFI_STATE"
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if ! command -v nmcli &>/dev/null; then
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warn "usr_ctl_wifi: nmcli not found (NetworkManager not installed) — skipping"
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else
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_wifi_grp_exists=false
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grep -qxF "usr_ctl_wifi" <<< "$_ALL_USER_GROUPS" && _wifi_grp_exists=true
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_WIFI_USERS=()
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if [[ "$_wifi_grp_exists" == true ]]; then
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while IFS= read -r _u; do
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[[ -z "$_u" ]] && continue
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_WIFI_USERS+=("$_u")
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done < <(_ipa_group_member_users usr_ctl_wifi)
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fi
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_wifi_in_desired() {
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local n="$1"
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for _d in "${_WIFI_USERS[@]+"${_WIFI_USERS[@]}"}"; do [[ "$_d" == "$n" ]] && return 0; done
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return 1
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}
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# Every current Wi-Fi connection UUID.
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_WIFI_UUIDS=()
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while IFS=: read -r _type _uuid; do
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[[ -z "$_uuid" ]] && continue
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[[ "$_type" == "wifi" || "$_type" == "802-11-wireless" ]] || continue
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_WIFI_UUIDS+=("$_uuid")
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done < <(nmcli -t -f TYPE,UUID connection show 2>/dev/null)
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# Grant: add each desired user to every Wi-Fi connection's permissions.
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for _u in "${_WIFI_USERS[@]+"${_WIFI_USERS[@]}"}"; do
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getent passwd "$_u" &>/dev/null || continue
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for _uuid in "${_WIFI_UUIDS[@]+"${_WIFI_UUIDS[@]}"}"; do
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_perms=$(nmcli -t -g connection.permissions connection show "$_uuid" 2>/dev/null)
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if [[ "$_perms" != *"user:${_u}:"* ]]; then
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nmcli connection modify "$_uuid" +connection.permissions "user:${_u}:" &>/dev/null \
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&& log "usr_ctl_wifi: granted $_u modify access to Wi-Fi connection $_uuid"
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fi
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done
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done
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# Revert: strip any previously-granted user from every Wi-Fi connection
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# once they're no longer in the group (or the group is gone).
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while IFS= read -r _old_u; do
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[[ -z "$_old_u" ]] && continue
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if ! _wifi_in_desired "$_old_u"; then
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for _uuid in "${_WIFI_UUIDS[@]+"${_WIFI_UUIDS[@]}"}"; do
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_perms=$(nmcli -t -g connection.permissions connection show "$_uuid" 2>/dev/null)
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[[ "$_perms" == *"user:${_old_u}:"* ]] && \
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nmcli connection modify "$_uuid" -connection.permissions "user:${_old_u}:" &>/dev/null
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done
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log "usr_ctl_wifi: revoked $_old_u Wi-Fi-modify access (left usr_ctl_wifi)"
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fi
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done < "$WIFI_STATE"
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if [[ ${#_WIFI_USERS[@]} -gt 0 ]]; then
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printf '%s\n' "${_WIFI_USERS[@]}" | sort -u > "$WIFI_STATE"
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else
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> "$WIFI_STATE"
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fi
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unset _wifi_grp_exists _WIFI_USERS _WIFI_UUIDS _u _uuid _perms _old_u
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fi
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