diff --git a/etc/crontab b/etc/crontab index 1f0950efcbbc..56ef4758eb67 100644 --- a/etc/crontab +++ b/etc/crontab @@ -8,11 +8,11 @@ HOME=/var/log # #minute hour mday month wday who command # -# save some entropy so that /dev/random can reseed on boot -*/3 * * * * operator /usr/libexec/save-entropy -# */5 * * * * root /usr/libexec/atrun # +# save some entropy so that /dev/random can reseed on boot +*/11 * * * * operator /usr/libexec/save-entropy +# # rotate log files every hour, if necessary 0 * * * * root newsyslog # diff --git a/etc/defaults/rc.conf b/etc/defaults/rc.conf index 7e3d2767c48f..79d52ce215a0 100644 --- a/etc/defaults/rc.conf +++ b/etc/defaults/rc.conf @@ -324,7 +324,7 @@ start_vinum="" # set to YES to start vinum unaligned_print="YES" # print unaligned access warnings on the alpha (or NO). entropy_file="/entropy" # Set to NO to disable caching entropy through reboots. # /var/db/entropy is preferred if / is not available. -entropy_dir="/.entropy" # Set to NO to disable caching entropy via cron. +entropy_dir="/var/db/entropy" # Set to NO to disable caching entropy via cron. entropy_save_sz="2048" # Size of the entropy cache files. entropy_save_num="8" # Number of entropy cache files to save. diff --git a/etc/mtree/BSD.root.dist b/etc/mtree/BSD.root.dist index 0fc9833f2040..e6e9a4d64c3a 100644 --- a/etc/mtree/BSD.root.dist +++ b/etc/mtree/BSD.root.dist @@ -5,10 +5,6 @@ /set type=dir uname=root gname=wheel mode=0755 . -/set type=dir uname=operator gname=operator mode=0700 - .entropy - .. -/set type=dir uname=root gname=wheel mode=0755 bin .. boot diff --git a/etc/mtree/BSD.var.dist b/etc/mtree/BSD.var.dist index 78bfd857f63c..053a0f5ac05b 100644 --- a/etc/mtree/BSD.var.dist +++ b/etc/mtree/BSD.var.dist @@ -24,6 +24,10 @@ .. .. db mode=0755 +/set type=dir uname=operator gname=operator mode=0700 + entropy + .. +/set type=dir uname=root gname=wheel pkg mode=0755 .. .. diff --git a/etc/rc b/etc/rc index 3f9fba7cc905..080f24618f46 100644 --- a/etc/rc +++ b/etc/rc @@ -71,6 +71,13 @@ elif [ -r /etc/rc.conf ]; then . /etc/rc.conf fi +feed_dev_random() { + if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then + echo "Using ${1} as an entropy file" + cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null + fi +} + chkdepend() { svc=$1 svc_var=$2 @@ -100,15 +107,15 @@ chkdepend NFS nfs_server_enable portmap portmap_enable chkdepend NIS nis_server_enable portmap portmap_enable chkdepend NIS nis_client_enable portmap portmap_enable -# First pass at entropy recovery so the rebooting /dev/random can reseed. +# First pass at reseeding /dev/random. # -feed_dev_random() { - if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then - echo "Using ${1} as an entropy file" - cat ${1} > /dev/random 2> /dev/random && - entropy_reseeded=yes - fi -} +# XXX temporary until we can get the entropy +# harvesting rate up +# Entropy below is not great, +# but better than nothing. +( ps -efauxww; sysctl -a; date; df -ib; dmesg; ps -efauxww; ) \ + | dd of=/dev/random bs=8k 2>/dev/null +cat /bin/ls | dd of=/dev/random bs=8k 2>/dev/null case ${entropy_file} in [Nn][Oo] | '') @@ -120,21 +127,6 @@ case ${entropy_file} in ;; esac -case ${entropy_dir} in -[Nn][Oo]) - ;; -*) - entropy_dir=${entropy_dir:-/.entropy} - if [ -d "${entropy_dir}" ]; then - if [ -w /dev/random ]; then - for seedfile in ${entropy_dir}/*; do - feed_dev_random "${seedfile}" - done - fi - fi - ;; -esac - # Configure ccd devices. # if [ -r /etc/ccd.conf ]; then @@ -224,44 +216,31 @@ if [ -n "${diskless_mount}" -a -r "${diskless_mount}" ]; then sh ${diskless_mount} fi -# Second attempt at reseeding, if needed. -# -case ${entropy_reseeded} in -yes) +# Reseed /dev/random with previously stored entropy. +case ${entropy_dir} in +[Nn][Oo]) ;; *) - case ${entropy_file} in - [Nn][Oo] | '') - ;; - *) + entropy_dir=${entropy_dir:-/var/db/entropy} + if [ -d "${entropy_dir}" ]; then if [ -w /dev/random ]; then - if [ -f "${entropy_file}" -a -r "${entropy_file}" -a \ - -s "${entropy_file}" ]; then - feed_dev_random "${entropy_file}" - elif [ "${entropy_file}" != /var/db/entropy -a \ - -f /var/db/entropy -a -r /var/db/entropy -a \ - -s /var/db/entropy ]; then - feed_dev_random /var/db/entropy - else - echo "Can't use ${entropy_file} as an entropy file, trying other sources" - # XXX temporary until we can get the entropy - # harvesting rate up - # Entropy below is not great, - # but better than nothing. - (ps -gauxwww; sysctl -a; - dmesg) | /bin/dd of=/dev/random bs=8k 2>/dev/null - ( for i in /etc /var/run ; do - cd $i ; ls -al ; cat * - done ) | /bin/dd of=/dev/random bs=8k 2>/dev/null - fi + for seedfile in ${entropy_dir}/*; do + feed_dev_random "${seedfile}" + done fi - ;; - esac + fi ;; esac -# Remove these to prevent problems on future reboots -rm -f "${entropy_file}" /var/db/entropy +case ${entropy_file} in +[Nn][Oo] | '') + ;; +*) + if [ -w /dev/random ]; then + feed_dev_random "${entropy_file}" + fi + ;; +esac adjkerntz -i diff --git a/libexec/save-entropy/save-entropy.sh b/libexec/save-entropy/save-entropy.sh index 4a84fd741959..82b96ca56912 100755 --- a/libexec/save-entropy/save-entropy.sh +++ b/libexec/save-entropy/save-entropy.sh @@ -29,6 +29,8 @@ # This script is called by cron to store bits of randomness which are # then used to seed /dev/random on boot. +# Originally developed by Doug Barton, DougB@FreeBSD.org + PATH=/bin:/usr/bin # If there is a global system configuration file, suck it in. @@ -45,33 +47,41 @@ case ${entropy_dir} in exit 0 ;; *) - entropy_dir=${entropy_dir:-/.entropy} + entropy_dir=${entropy_dir:-/var/db/entropy} ;; esac entropy_save_sz=${entropy_save_sz:-2048} entropy_save_num=${entropy_save_num:-8} -entropy_save_jot=$(($entropy_save_num - 1)) if [ ! -d "${entropy_dir}" ]; then umask 077 mkdir "${entropy_dir}" || { - logger -is The entropy directory "${entropy_dir}" does not \ + logger -is -t "$0" The entropy directory "${entropy_dir}" does not \ exist, and cannot be created. Therefore no entropy can be saved. ; exit 1;} /usr/sbin/chown operator:operator "${entropy_dir}" chmod 0700 "${entropy_dir}" fi -rm -f "${entropy_dir}/saved-entropy.${entropy_save_num}" - umask 377 -for file_num in `jot ${entropy_save_jot} ${entropy_save_jot} 1`; do - if [ -f "${entropy_dir}/saved-entropy.${file_num}" ]; then - new_num=$(($file_num + 1)) - mv "${entropy_dir}/saved-entropy.${file_num}" \ - "${entropy_dir}/saved-entropy.${new_num}" +for file_num in `jot ${entropy_save_num} ${entropy_save_num} 1`; do + if [ -e "${entropy_dir}/saved-entropy.${file_num}" ]; then + if [ -f "${entropy_dir}/saved-entropy.${file_num}" ]; then + new_num=$(($file_num + 1)) + if [ "${new_num}" -gt "${entropy_save_num}" ]; then + rm -f "${entropy_dir}/saved-entropy.${file_num}" + else + mv "${entropy_dir}/saved-entropy.${file_num}" \ + "${entropy_dir}/saved-entropy.${new_num}" + fi + else + logger -is -t "$0" \ +"${entropy_dir}/saved-entropy.${file_num} is not a regular file, and therefore \ +it will not be rotated. Entropy file harvesting is aborted." + exit 1 + fi fi done