[Unit]
Description=Fingerprint Authentication Daemon
Documentation=man:fprintd(1)

[Service]
Type=dbus
BusName=net.reactivated.Fprint
ExecStart=/usr/libexec/fprintd

# Filesystem lockdown
ProtectSystem=strict
ProtectKernelTunables=true
ProtectKernelLogs=true
ProtectControlGroups=true
# This always corresponds to /var/lib/fprint
StateDirectory=fprint
StateDirectoryMode=0700
ProtectHome=true
PrivateTmp=true

SystemCallFilter=@system-service

# Network
PrivateNetwork=true
RestrictAddressFamilies=AF_UNIX AF_LOCAL AF_NETLINK

# Execute Mappings
MemoryDenyWriteExecute=true

# Modules
ProtectKernelModules=true

# Real-time
RestrictRealtime=true

# Privilege escalation
NoNewPrivileges=true

# Protect clock, allow USB and SPI device access
ProtectClock=yes
DeviceAllow=char-usb_device rw
DeviceAllow=char-spi rw
DeviceAllow=char-hidraw rw

# Allow tuning USB parameters (wakeup and persist)
ReadWritePaths=/sys/devices