1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
#!/bin/sh
#
# ssh-user-config, Copyright 2000, 2001, 2002, 2003, Red Hat Inc.
#
# This file is part of the Cygwin port of OpenSSH.
# Directory where the config files are stored
SYSCONFDIR=/etc
progname=$0
auto_answer=""
auto_passphrase="no"
passphrase=""
request()
{
if [ "${auto_answer}" = "yes" ]
then
return 0
elif [ "${auto_answer}" = "no" ]
then
return 1
fi
answer=""
while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
do
echo -n "$1 (yes/no) "
read answer
done
if [ "X${answer}" = "Xyes" ]
then
return 0
else
return 1
fi
}
# Check if running on NT
_sys="`uname -a`"
_nt=`expr "$_sys" : "CYGWIN_NT"`
# If running on NT, check if running under 2003 Server or later
if [ $_nt -gt 0 ]
then
_nt2003=`uname | awk -F- '{print ( $2 >= 5.2 ) ? 1 : 0;}'`
fi
# Check options
while :
do
case $# in
0)
break
;;
esac
option=$1
shift
case "$option" in
-d | --debug )
set -x
;;
-y | --yes )
auto_answer=yes
;;
-n | --no )
auto_answer=no
;;
-p | --passphrase )
with_passphrase="yes"
passphrase=$1
shift
;;
*)
echo "usage: ${progname} [OPTION]..."
echo
echo "This script creates an OpenSSH user configuration."
echo
echo "Options:"
echo " --debug -d Enable shell's debug output."
echo " --yes -y Answer all questions with \"yes\" automatically."
echo " --no -n Answer all questions with \"no\" automatically."
echo " --passphrase -p word Use \"word\" as passphrase automatically."
echo
exit 1
;;
esac
done
# Ask user if user identity should be generated
if [ ! -f ${SYSCONFDIR}/passwd ]
then
echo "${SYSCONFDIR}/passwd is nonexistant. Please generate an ${SYSCONFDIR}/passwd file"
echo 'first using mkpasswd. Check if it contains an entry for you and'
echo 'please care for the home directory in your entry as well.'
exit 1
fi
uid=`id -u`
pwdhome=`awk -F: '{ if ( $3 == '${uid}' ) print $6; }' < ${SYSCONFDIR}/passwd`
if [ "X${pwdhome}" = "X" ]
then
echo "There is no home directory set for you in ${SYSCONFDIR}/passwd."
echo 'Setting $HOME is not sufficient!'
exit 1
fi
if [ ! -d "${pwdhome}" ]
then
echo "${pwdhome} is set in ${SYSCONFDIR}/passwd as your home directory"
echo 'but it is not a valid directory. Cannot create user identity files.'
exit 1
fi
# If home is the root dir, set home to empty string to avoid error messages
# in subsequent parts of that script.
if [ "X${pwdhome}" = "X/" ]
then
# But first raise a warning!
echo "Your home directory in ${SYSCONFDIR}/passwd is set to root (/). This is not recommended!"
if request "Would you like to proceed anyway?"
then
pwdhome=''
else
exit 1
fi
fi
if [ -d "${pwdhome}" -a $_nt -gt 0 -a -n "`chmod -c g-w,o-w "${pwdhome}"`" ]
then
echo
echo 'WARNING: group and other have been revoked write permission to your home'
echo " directory ${pwdhome}."
echo ' This is required by OpenSSH to allow public key authentication using'
echo ' the key files stored in your .ssh subdirectory.'
echo ' Revert this change ONLY if you know what you are doing!'
echo
fi
if [ -e "${pwdhome}/.ssh" -a ! -d "${pwdhome}/.ssh" ]
then
echo "${pwdhome}/.ssh is existant but not a directory. Cannot create user identity files."
exit 1
fi
if [ ! -e "${pwdhome}/.ssh" ]
then
mkdir "${pwdhome}/.ssh"
if [ ! -e "${pwdhome}/.ssh" ]
then
echo "Creating users ${pwdhome}/.ssh directory failed"
exit 1
fi
fi
if [ $_nt -gt 0 ]
then
_user="system"
if [ $_nt2003 -gt 0 ]
then
grep -q '^sshd_server:' ${SYSCONFDIR}/passwd && _user="sshd_server"
fi
if ! setfacl -m "u::rwx,u:${_user}:r--,g::---,o::---" "${pwdhome}/.ssh"
then
echo "${pwdhome}/.ssh couldn't be given the correct permissions."
echo "Please try to solve this problem first."
exit 1
fi
fi
if [ ! -f "${pwdhome}/.ssh/identity" ]
then
if request "Shall I create an SSH1 RSA identity file for you?"
then
echo "Generating ${pwdhome}/.ssh/identity"
if [ "${with_passphrase}" = "yes" ]
then
ssh-keygen -t rsa1 -N "${passphrase}" -f "${pwdhome}/.ssh/identity" > /dev/null
else
ssh-keygen -t rsa1 -f "${pwdhome}/.ssh/identity" > /dev/null
fi
if request "Do you want to use this identity to login to this machine?"
then
echo "Adding to ${pwdhome}/.ssh/authorized_keys"
cat "${pwdhome}/.ssh/identity.pub" >> "${pwdhome}/.ssh/authorized_keys"
fi
fi
fi
if [ ! -f "${pwdhome}/.ssh/id_rsa" ]
then
if request "Shall I create an SSH2 RSA identity file for you? (yes/no) "
then
echo "Generating ${pwdhome}/.ssh/id_rsa"
if [ "${with_passphrase}" = "yes" ]
then
ssh-keygen -t rsa -N "${passphrase}" -f "${pwdhome}/.ssh/id_rsa" > /dev/null
else
ssh-keygen -t rsa -f "${pwdhome}/.ssh/id_rsa" > /dev/null
fi
if request "Do you want to use this identity to login to this machine?"
then
echo "Adding to ${pwdhome}/.ssh/authorized_keys"
cat "${pwdhome}/.ssh/id_rsa.pub" >> "${pwdhome}/.ssh/authorized_keys"
fi
fi
fi
if [ ! -f "${pwdhome}/.ssh/id_dsa" ]
then
if request "Shall I create an SSH2 DSA identity file for you? (yes/no) "
then
echo "Generating ${pwdhome}/.ssh/id_dsa"
if [ "${with_passphrase}" = "yes" ]
then
ssh-keygen -t dsa -N "${passphrase}" -f "${pwdhome}/.ssh/id_dsa" > /dev/null
else
ssh-keygen -t dsa -f "${pwdhome}/.ssh/id_dsa" > /dev/null
fi
if request "Do you want to use this identity to login to this machine?"
then
echo "Adding to ${pwdhome}/.ssh/authorized_keys"
cat "${pwdhome}/.ssh/id_dsa.pub" >> "${pwdhome}/.ssh/authorized_keys"
fi
fi
fi
if [ $_nt -gt 0 -a -e "${pwdhome}/.ssh/authorized_keys" ]
then
if ! setfacl -m "u::rw-,u:${_user}:r--,g::---,o::---" "${pwdhome}/.ssh/authorized_keys"
then
echo
echo "WARNING: Setting correct permissions to ${pwdhome}/.ssh/authorized_keys"
echo "failed. Please care for the correct permissions. The minimum requirement"
echo "is, the owner and ${_user} both need read permissions."
echo
fi
fi
echo
echo "Configuration finished. Have fun!"
|
