3 # $FreeBSD: src/etc/rc.d/random,v 1.3 2003/04/18 17:55:05 mtm Exp $
4 # $DragonFly: src/etc/rc.d/random,v 1.4 2006/07/10 22:19:14 dillon Exp $
8 # REQUIRE: diskless mountcritlocal initrandom
15 start_cmd="random_start"
16 stop_cmd="random_stop"
20 if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
21 sysctl kern.seedenable=1 >/dev/null
22 # Feed using a small block size so that a pool-based CSPRNG
23 # is more likely to distribute the entropy over several
25 cat "${1}" | dd of=/dev/random bs=512 2>/dev/null
26 sysctl kern.seedenable=0 >/dev/null
32 # Reseed /dev/random with previously stored entropy.
33 case ${entropy_dir} in
37 entropy_dir=${entropy_dir:-/var/db/entropy}
38 if [ -d "${entropy_dir}" ]; then
39 if [ -w /dev/random ]; then
40 for seedfile in ${entropy_dir}/*; do
41 feed_dev_random "${seedfile}"
48 case ${entropy_file} in
52 if [ -w /dev/random ]; then
53 feed_dev_random "${entropy_file}"
61 # Write some entropy so when the machine reboots /dev/random
64 case ${entropy_file} in
68 echo -n 'Writing entropy file:'
72 if touch ${entropy_file}; then
73 entropy_file_confirmed="${entropy_file}"
75 case ${entropy_file_confirmed} in
77 err 1 '${entropy_file}:' \
78 ' entropy file write failed.'
81 dd if=/dev/random of=${entropy_file_confirmed} \
82 bs=${entropy_save_sz} count=1 2> /dev/null