3 # $FreeBSD: src/etc/rc.d/random,v 1.3 2003/04/18 17:55:05 mtm Exp $
7 # REQUIRE: diskless mountcritlocal initrandom
14 start_cmd="random_start"
15 stop_cmd="random_stop"
19 if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
20 ${SYSCTL_W} kern.seedenable=1 >/dev/null
21 # Feed using a small block size so that a pool-based CSPRNG
22 # is more likely to distribute the entropy over several
24 cat "${1}" | dd of=/dev/random bs=512 2>/dev/null
25 ${SYSCTL_W} kern.seedenable=0 >/dev/null
31 # Reseed /dev/random with previously stored entropy.
32 case ${entropy_dir} in
36 entropy_dir=${entropy_dir:-/var/db/entropy}
37 if [ -d "${entropy_dir}" ]; then
38 if [ -w /dev/random ]; then
39 for seedfile in ${entropy_dir}/*; do
40 feed_dev_random "${seedfile}"
47 case ${entropy_file} in
51 if [ -w /dev/random ]; then
52 feed_dev_random "${entropy_file}"
60 # Write some entropy so when the machine reboots /dev/random
63 case ${entropy_file} in
67 echo -n 'Writing entropy file:'
71 if touch ${entropy_file}; then
72 entropy_file_confirmed="${entropy_file}"
74 case ${entropy_file_confirmed} in
76 err 1 '${entropy_file}:' \
77 ' entropy file write failed.'
80 dd if=/dev/random of=${entropy_file_confirmed} \
81 bs=${entropy_save_sz} count=1 2> /dev/null