etc/rc.d/sshd

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