This file is indexed.

/usr/bin/impwagent is in im 1:151-3.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
#! /usr/bin/perl
################################################################
###
###                             impwagent
###
### Author:  Internet Message Group <img@mew.org>
### Created: Sep 13, 1997
### Revised: Apr 23, 2007
###

BEGIN {
    use lib '/usr/share/perl5';
};

$Prog = 'impwagent';
my $VERSION_DATE = "20110525";
my $VERSION_NUMBER = "151";
my $VERSION = "${Prog} version ${VERSION_DATE}(IM${VERSION_NUMBER})";
my $VERSION_INFORMATION = "${Prog} (IM ${VERSION_NUMBER}) ${VERSION_DATE}
Copyright (C) 1999 IM developing team
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
";

##
## Require packages
##

require 5.003;
use Socket;
use IM::Config;
use IM::GetPass;
use IM::Util;

##
## Main
##

@OptConfig = ();
init_opt(\@OptConfig);
read_cfg();

# server termination
if ($ARGV[0] =~ /stop|quit/i) {
    $res = &connect_agent(1);
    $res = &talk_agent("QUIT\n") if ($res ne '');
    if ($res eq '') {
	print "$Prog: server is not running\n";
    } else {
	print "$Prog: exit message: $res\n";
    }
    exit $EXIT_SUCCESS;
}

# clear password cache
if ($ARGV[0] =~ /clear/i) {
    $res = &connect_agent(1);
    $res = &talk_agent("CLEAR\n") if ($res ne '');
    if ($res eq '') {
	print "$Prog: server is not running\n";
    } else {
	print "$Prog: exit message: $res\n";
    }
    exit $EXIT_SUCCESS;
}

if ($ARGV[0] =~ /--version/i) {
    print("${VERSION_INFORMATION}") && exit $EXIT_SUCCESS;
}

# display help
if ($ARGV[0] !~ /start/i && @ARGV > 0) {
    print <<EOF;
$VERSION
hold passwords for IM

Usage:
	$Prog [start]       start $Prog
	$Prog stop|quit     terminate $Prog
	$Prog clear         clear passwords held by $Prog
	$Prog help|--help   Display this help and exit
	$Prog --version     Output version information and exit

This command holds passwords to reuse on later sessions for IM.

If you wish to use the feature supplied by $Prog, put "UsePwAgent=yes"
in your Config file, and start $Prog manually before using im* commands
which require passwords.

Report bugs to <tats\@vega.ocn.ne.jp>
EOF
    exit $EXIT_SUCCESS;
}

# duplicate check
$res = &connect_agent(1);
$res = &talk_agent("PING\n") if ($res ne '');
if ($res eq 'PONG') {
    print STDERR "$Prog: already running.\n";
    exit $EXIT_ERROR;
}

# preparing socket directory
my $realuser = im_getlogin();
unless ($realuser) {
    print STDERR "$Prog: cannot get login name.\n";
    exit $EXIT_ERROR;
}
my $dir = &pwagent_tmp_path() . "-$realuser";

my $port = &pwagentport();
if ($port > 0) {
    rmdir $dir;
    unless (mkdir($dir, 0700)) {
	print STDERR "$Prog: cannot create directory: $dir.\n";
	exit $EXIT_ERROR;
    }

    unless (socket(SOCK, &AF_INET, &SOCK_STREAM, 0)) {
	print STDERR "$Prog: socket: $!\n";
	exit $EXIT_ERROR;
    }
    my $sin = sockaddr_in($port, inet_aton('127.0.0.1'));
    unless (bind(SOCK, $sin)) {
	print STDERR "$Prog: bind: $!\n";
	exit $EXIT_ERROR;
    }
} else {
    $sockname = "$dir/pw";

    # be sure the dir is not a link
    unlink $sockname;
    rmdir $dir;
    unless (mkdir($dir, 0700)) {
	print STDERR "$Prog: cannot create directory: $dir.\n";
	exit $EXIT_ERROR;
    }

    unless (socket(SOCK, &AF_UNIX, &SOCK_STREAM, 0)) {
	print STDERR "$Prog: socket: $!\n";
	exit $EXIT_ERROR;
    }
    my $sun = sockaddr_un($sockname);
    unless (bind(SOCK, $sun)) {
	print STDERR "$Prog: bind: $!\n";
	exit $EXIT_ERROR;
    }

    chmod(0600, $sockname);
}

listen(SOCK, 5);
select(SOCK); $| = 1; select(STDOUT);

$SIG{'ALRM'} = \&alarm_func;

#my $ppid = getppid();
my $id = fork();
if ($id < 0) {
    print STDERR "$Prog: cannot fork: $!\n";
    exit $EXIT_ERROR;
}

if ($id) {
    print STDERR "$Prog: started (pid: $id)\n";
    exit $EXIT_SUCCESS;
}

chdir($dir);

@_ = unpack('C2', pack('L', rand(time * $$)));
foreach (@_) {
    $_ |= 0x20 if ($_ < 0x20);
}
my $key = pack('C2', @_);

for (;;) {
    unless (accept(REQ, SOCK)) {
	print STDERR "$Prog: accept: $!\n";
	exit $EXIT_ERROR;
    }
    if ($port > 0) {
	my $sa = getpeername(REQ);
	my($fa, $po, $ad) = sockaddr_in($sa);
	next if ($ad != inet_aton('127.0.0.1'));
    }
    select(REQ); $| = 1; select(STDOUT);
    print REQ "$key\n";
    alarm(3);
    $_ = <REQ>;
    alarm(0);
    chomp;
    if (/^PING$/) {
	print REQ "PONG\n";
    } elsif (/^CLEAR$/) {
	undef %pwcache;
	print REQ "CLEARED\n";
    } elsif (/^SAVE\t(.*)/) {
	my $param = $1;
	alarm(3);
	$_ = <REQ>;
	alarm(0);
	chomp;
	if (/^PASS\t/) {
	    # decode from HEX string
	    $pwcache{$param} = pack('H*', substr($_, 5));
	    print REQ "OK\n";
	} else {
	    print REQ "ERROR\n";
	}
    } elsif (/^LOAD\t(.*)/) {
	# encode to HEX string
	$_ = "PASS\t" . unpack('H*', $pwcache{$1}) . "\n";
	print REQ $_;
    } else {
	# protocol error (including QUIT)
	print REQ "BYE\n";
	shutdown(REQ, 2);
	close(REQ);
	close(SOCK);
	unlink($sockname) if ($sockname);
	rmdir $dir;
	exit $EXIT_ERROR;
    }
    substr($_, 0, length($_)) = '0123456789abcdef';
    shutdown(REQ, 2);
    close(REQ);
}

sub alarm_func {
#   no operation
}

__END__

=head1 NAME

impwagent - hold passwords for IM

=head1 SYNOPSIS

B<impwagent> [OPTIONS]

=head1 DESCRIPTION

The I<impwagent> command holds passwords to reuse on later
sessions for IM.

If you wish to use the feature supplied by impwagent, put

    UsePwAgent=yes

in your Config file, and start impwagent manually before using im* commands
which require passwords.

This command is provided by IM (Internet Message).

=head1 OPTIONS

=over 5

=item I<start>

Start impwagent.  This is the default behavior.

=item I<stop>, I<quit>

Terminate impwagent.

=item I<clear>

Clear passwords held by impwagent.

=item I<help, --help>

Display help message and exit.

=item I<--version>

Output version information and exit.

=back

=head1 COPYRIGHT

IM (Internet Message) is copyrighted by IM developing team.
You can redistribute it and/or modify it under the modified BSD
license.  See the copyright file for more details.

=cut

### Copyright (C) 1997, 1998, 1999 IM developing team
### All rights reserved.
### 
### Redistribution and use in source and binary forms, with or without
### modification, are permitted provided that the following conditions
### are met:
### 
### 1. Redistributions of source code must retain the above copyright
###    notice, this list of conditions and the following disclaimer.
### 2. Redistributions in binary form must reproduce the above copyright
###    notice, this list of conditions and the following disclaimer in the
###    documentation and/or other materials provided with the distribution.
### 3. Neither the name of the team nor the names of its contributors
###    may be used to endorse or promote products derived from this software
###    without specific prior written permission.
### 
### THIS SOFTWARE IS PROVIDED BY THE TEAM AND CONTRIBUTORS ``AS IS'' AND
### ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
### IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
### PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE TEAM OR CONTRIBUTORS BE
### LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
### CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
### SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
### BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
### WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
### OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
### IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

### Local Variables:
### mode: perl
### End: