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comparison plugins/password/helpers/passwd-expect @ 0:1e000243b222

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vanilla 1.3.3 distro, I hope
author Charlie Root
date Thu, 04 Jan 2018 15:50:29 -0500
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-1:000000000000 0:1e000243b222
1 #
2 # This scripts changes a password on the local system or a remote host.
3 # Connections to the remote (this can also be localhost) are made by ssh, rsh,
4 # telnet or rlogin.
5
6 # @author Gaudenz Steinlin <gaudenz@soziologie.ch>
7
8 # For sudo support alter sudoers (using visudo) so that it contains the
9 # following information (replace 'apache' if your webserver runs under another
10 # user):
11 # -----
12 # # Needed for Horde's passwd module
13 # Runas_Alias REGULARUSERS = ALL, !root
14 # apache ALL=(REGULARUSERS) NOPASSWD:/usr/bin/passwd
15 # -----
16
17 # @stdin The username, oldpassword, newpassword (in this order)
18 # will be taken from stdin
19 # @param -prompt regexp for the shell prompt
20 # @param -password regexp password prompt
21 # @param -oldpassword regexp for the old password
22 # @param -newpassword regexp for the new password
23 # @param -verify regexp for verifying the password
24 # @param -success regexp for success changing the password
25 # @param -login regexp for the telnet prompt for the loginname
26 # @param -host hostname to be connected
27 # @param -timeout timeout for each step
28 # @param -log file for writing error messages
29 # @param -output file for loging the output
30 # @param -telnet use telnet
31 # @param -ssh use ssh (default)
32 # @param -rlogin use rlogin
33 # @param -slogin use slogin
34 # @param -sudo use sudo
35 # @param -program command for changing passwords
36 #
37 # @return 0 on success, 1 on failure
38 #
39
40
41 # default values
42 set host "localhost"
43 set login "ssh"
44 set program "passwd"
45 set prompt_string "(%|\\\$|>)"
46 set fingerprint_string "The authenticity of host.* can't be established.*\nRSA key fingerprint is.*\nAre you sure you want to continue connecting.*"
47 set password_string "(P|p)assword.*"
48 set oldpassword_string "((O|o)ld|login|\\\(current\\\) UNIX) (P|p)assword.*"
49 set newpassword_string "(N|n)ew.* (P|p)assword.*"
50 set badoldpassword_string "(Authentication token manipulation error).*"
51 set badpassword_string "((passwd|BAD PASSWORD).*|(passwd|Bad:).*\r)"
52 set verify_string "((R|r)e-*enter.*(P|p)assword|Retype new( UNIX)? password|(V|v)erification|(V|v)erify|(A|a)gain).*"
53 set success_string "((P|p)assword.* changed|successfully)"
54 set login_string "(((L|l)ogin|(U|u)sername).*)"
55 set timeout 20
56 set log "/tmp/passwd.out"
57 set output false
58 set output_file "/tmp/passwd.log"
59
60 # read input from stdin
61 fconfigure stdin -blocking 1
62
63 gets stdin user
64 gets stdin password(old)
65 gets stdin password(new)
66
67 # alternative: read input from command line
68 #if {$argc < 3} {
69 # send_user "Too few arguments: Usage $argv0 username oldpass newpass"
70 # exit 1
71 #}
72 #set user [lindex $argv 0]
73 #set password(old) [lindex $argv 1]
74 #set password(new) [lindex $argv 2]
75
76 # no output to the user
77 log_user 0
78
79 # read in other options
80 for {set i 0} {$i<$argc} {incr i} {
81 set arg [lindex $argv $i]
82 switch -- $arg "-prompt" {
83 incr i
84 set prompt_string [lindex $argv $i]
85 continue
86 } "-password" {
87 incr i
88 set password_string [lindex $argv $i]
89 continue
90 } "-oldpassword" {
91 incr i
92 set oldpassword_string [lindex $argv $i]
93 continue
94 } "-newpassword" {
95 incr i
96 set newpassword_string [lindex $argv $i]
97 continue
98 } "-verify" {
99 incr i
100 set verify_string [lindex $argv $i]
101 continue
102 } "-success" {
103 incr i
104 set success_string [lindex $argv $i]
105 continue
106 } "-login" {
107 incr i
108 set login_string [lindex $argv $i]
109 continue
110 } "-host" {
111 incr i
112 set host [lindex $argv $i]
113 continue
114 } "-timeout" {
115 incr i
116 set timeout [lindex $argv $i]
117 continue
118 } "-log" {
119 incr i
120 set log [lindex $argv $i]
121 continue
122 } "-output" {
123 incr i
124 set output_file [lindex $argv $i]
125 set output true
126 continue
127 } "-telnet" {
128 set login "telnet"
129 continue
130 } "-ssh" {
131 set login "ssh"
132 continue
133 } "-ssh-exec" {
134 set login "ssh-exec"
135 continue
136 } "-rlogin" {
137 set login "rlogin"
138 continue
139 } "-slogin" {
140 set login "slogin"
141 continue
142 } "-sudo" {
143 set login "sudo"
144 continue
145 } "-program" {
146 incr i
147 set program [lindex $argv $i]
148 continue
149 }
150 }
151
152 # log session
153 if {$output} {
154 log_file $output_file
155 }
156
157 set err [open $log "w" "0600"]
158
159 # start remote session
160 if {[string match $login "rlogin"]} {
161 set pid [spawn rlogin $host -l $user]
162 } elseif {[string match $login "slogin"]} {
163 set pid [spawn slogin $host -l $user]
164 } elseif {[string match $login "ssh"]} {
165 set pid [spawn ssh $host -l $user]
166 } elseif {[string match $login "ssh-exec"]} {
167 set pid [spawn ssh $host -l $user $program]
168 } elseif {[string match $login "sudo"]} {
169 set pid [spawn sudo -u $user $program]
170 } elseif {[string match $login "telnet"]} {
171 set pid [spawn telnet $host]
172 expect -re $login_string {
173 sleep .5
174 send "$user\r"
175 }
176 } else {
177 puts $err "Invalid login mode. Valid modes: rlogin, slogin, ssh, telnet, sudo\n"
178 close $err
179 exit 1
180 }
181
182 set old_password_notentered true
183
184 if {![string match $login "sudo"]} {
185 # log in
186 expect {
187 -re $fingerprint_string {sleep .5
188 send yes\r
189 exp_continue}
190 -re $password_string {sleep .5
191 send $password(old)\r}
192 timeout {puts $err "Could not login to system (no password prompt)\n"
193 close $err
194 exit 1}
195 }
196
197 # start password changing program
198 expect {
199 -re $prompt_string {sleep .5
200 send $program\r}
201 # The following is for when passwd is the login shell or ssh-exec is used
202 -re $oldpassword_string {sleep .5
203 send $password(old)\r
204 set old_password_notentered false}
205 timeout {puts $err "Could not login to system (bad old password?)\n"
206 close $err
207 exit 1}
208 }
209 }
210
211 # send old password
212 if {$old_password_notentered} {
213 expect {
214 -re $oldpassword_string {sleep .5
215 send $password(old)\r}
216 timeout {puts $err "Could not start passwd program (no old password prompt)\n"
217 close $err
218 exit 1}
219 }
220 }
221
222 # send new password
223 expect {
224 -re $newpassword_string {sleep .5
225 send $password(new)\r}
226 -re $badoldpassword_string {puts $err "Old password is incorrect\n"
227 close $err
228 exit 1}
229 timeout {puts "Could not change password (bad old password?)\n"
230 close $err
231 exit 1}
232 }
233
234 # send new password again
235 expect {
236 -re $badpassword_string {puts $err "$expect_out(0,string)"
237 close $err
238 send \003
239 sleep .5
240 exit 1}
241 -re $verify_string {sleep .5
242 send $password(new)\r}
243 timeout {puts $err "New password not valid (too short, bad password, too similar, ...)\n"
244 close $err
245 send \003
246 sleep .5
247 exit 1}
248 }
249
250 # check response
251 expect {
252 -re $success_string {sleep .5
253 send exit\r}
254 -re $badpassword_string {puts $err "$expect_out(0,string)"
255 close $err
256 exit 1}
257 timeout {puts $err "Could not change password.\n"
258 close $err
259 exit 1}
260 }
261
262 # exit succsessfully
263 expect {
264 eof {close $err
265 exit 0}
266 }
267 close $err