sshd revision 242153 
1#!/bin/sh
2#
3# $FreeBSD: stable/9/etc/rc.d/sshd 242153 2012-10-26 18:06:49Z obrien $
4#
5
6# PROVIDE: sshd
7# REQUIRE: LOGIN FILESYSTEMS
8# KEYWORD: shutdown
9
10. /etc/rc.subr
11
12name="sshd"
13rcvar="sshd_enable"
14command="/usr/sbin/${name}"
15keygen_cmd="sshd_keygen"
16start_precmd="sshd_precmd"
17pidfile="/var/run/${name}.pid"
18extra_commands="keygen reload"
19
20timeout=300
21
22user_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
44sshd_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 an 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	if [ -f /etc/ssh/ssh_host_ecdsa_key ]; then
81		echo "You already have an ECDSA host key" \
82		    "in /etc/ssh/ssh_host_ecdsa_key"
83		echo "Skipping protocol version 2 ECDSA Key Generation"
84	else
85		/usr/bin/ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N ''
86	fi
87	)
88}
89
90sshd_precmd()
91{
92	if [ ! -f /etc/ssh/ssh_host_key -o \
93	    ! -f /etc/ssh/ssh_host_dsa_key -o \
94	    ! -f /etc/ssh/ssh_host_ecdsa_key -o \
95	    ! -f /etc/ssh/ssh_host_rsa_key ]; then
96		user_reseed
97		run_rc_command keygen
98	fi
99}
100
101load_rc_config $name
102run_rc_command "$1"
103