etc/rc.d/sshd

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5
   6 # PROVIDE: sshd
   7 # REQUIRE: LOGIN cleanvar
   8
   9 . /etc/rc.subr
  10
  11 name="sshd"
  12 rcvar=`set_rcvar`
  13 command="/usr/sbin/${name}"
  14 keygen_cmd="sshd_keygen"
  15 start_precmd="sshd_precmd"
  16 pidfile="/var/run/${name}.pid"
  17 extra_commands="keygen reload"
  18
  19 timeout=300
  20
  21 user_reseed()
  22 {
  23         (
  24         seeded=`sysctl -n kern.random.sys.seeded 2>/dev/null`
  25         if [ "x${seeded}" != "x" ] && [ ${seeded} -eq 0 ] ; then
  26                 warn "Setting entropy source to blocking mode."
  27                 echo "===================================================="
  28                 echo "Type a full screenful of random junk to unblock"
  29                 echo "it and remember to finish with <enter>. This will"
  30                 echo "timeout in ${timeout} seconds, but waiting for"
  31                 echo "the timeout without typing junk may make the"
  32                 echo "entropy source deliver predictable output."
  33                 echo ""
  34                 echo "Just hit <enter> for fast+insecure startup."
  35                 echo "===================================================="
  36                 sysctl kern.random.sys.seeded=0 2>/dev/null
  37                 read -t ${timeout} junk
  38                 echo "${junk}" `sysctl -a` `date` > /dev/random
  39         fi
  40         )
  41 }
  42
  43 sshd_keygen()
  44 {
  45         (
  46         umask 022
  47
  48         # Can't do anything if ssh is not installed
  49         [ -x /usr/bin/ssh-keygen ] || {
  50                 warn "/usr/bin/ssh-keygen does not exist."
  51                 return 1
  52         }
  53
  54         if [ -f /etc/ssh/ssh_host_key ]; then
  55                 echo "You already have an RSA host key" \
  56                     "in /etc/ssh/ssh_host_key"
  57                 echo "Skipping protocol version 1 RSA Key Generation"
  58         else
  59                 /usr/bin/ssh-keygen -t rsa1 -b 1024 \
  60                     -f /etc/ssh/ssh_host_key -N ''
  61         fi
  62
  63         if [ -f /etc/ssh/ssh_host_dsa_key ]; then
  64                 echo "You already have a DSA host key" \
  65                     "in /etc/ssh/ssh_host_dsa_key"
  66                 echo "Skipping protocol version 2 DSA Key Generation"
  67         else
  68                 /usr/bin/ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N ''
  69         fi
  70
  71         if [ -f /etc/ssh/ssh_host_rsa_key ]; then
  72                 echo "You already have a RSA host key" \
  73                     "in /etc/ssh/ssh_host_rsa_key"
  74                 echo "Skipping protocol version 2 RSA Key Generation"
  75         else
  76                 /usr/bin/ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N ''
  77         fi
  78         )
  79 }
  80
  81 sshd_precmd()
  82 {
  83         if [ ! -f /etc/ssh/ssh_host_key -o \
  84             ! -f /etc/ssh/ssh_host_dsa_key -o \
  85             ! -f /etc/ssh/ssh_host_rsa_key ]; then
  86                 user_reseed
  87                 run_rc_command keygen
  88         fi
  89 }
  90
  91 load_rc_config $name
  92 run_rc_command "$1"