This file is indexed.

/usr/share/sendmail/update_authm4 is in sendmail-base 8.15.2-8.

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
#!/usr/bin/perl -w
#------------------------------------------------------------------------
#
# $Sendmail: update_auth,v 8.15.2 2016-12-08 18:43:49 cowboy Exp $
#
# Create /etc/mail/sasl/sasl.m4 for Debian Sendmail
#
# Copyright 1998-2010 Richard Nelson.  All Rights Reserved.
#
# Notes (to all):
#	*
#
# Notes (to self):
#	*
#
#------------------------------------------------------------------------
#
# Initialization of the perl environment
use strict;			# be kosher
use Cwd;			# provide cwd()
use Env;			# A few environmental references
use integer;		# Peformance
use Sys::Hostname;	# make sure we have a valid hostname
use Getopt::Long;	# parameter handling

# Local libraries - for Debian Sendmail Perl helper functions
# BEGIN { $main::my_path = substr($0,$[,rindex($0,'/')) };
use lib ('.', substr($0,$[,rindex($0,'/')), "/usr/share/sendmail");
require Parse_mc;

# Version of this program
#($main::MYNAME			= $main::0) =~ s|.*/||;
#$main::Author			= "Richard Nelson";
#$main::AuthorMail		= "cowboy\@debian.org";
#$main::Version			= '$Revision: 2.00 $ ';
$main::program_name    = $0;
$main::program_version = '8.15.2';
$main::program_date    = '2016-12-08 18:43:49 cowboy';
$main::debug			= 0;

my $interp_pgm = "$^X";
my $interp_vrm = $];
$interp_vrm = ("$^V" | '000') if (defined $^V);
my $current_time = scalar localtime;
my $user = getlogin || (getpwuid($<))[0] || "Unknown!!";
my $hostname = hostname();
my $directory = getcwd();

my $SASL_def = "/etc/mail/sasl/sasl.m4";

# Hash of define names to filename
my %Def_Map;

#
#------------------------------------------------------------------------------
# Finally, some code (almost)
#------------------------------------------------------------------------------
#
# Argument handling...
$main::opt_help='';
$main::opt_output_file='';
$main::opt_input_file='';
$main::opt_debug='';
my @options = qw(
	help|h
	output-file|output_file|o:s
	input-file|input_file|i:s
	debug!
	);
my $result = GetOptions(@options);
if ( ! $result ) {
	die "Terminating due to parameter error";
	};
if ( $main::opt_help ) {
	warn "$main::program_name $main::program_version $main::program_date\n";
	warn "$0 \n";
	warn "	 -help\n" if $main::opt_help;
	warn "	 -debug\n" if $main::opt_debug;
	warn "	 -o $main::opt_output_file\n" if $main::opt_output_file;
	warn "	 -i $main::opt_input_file\n"  if $main::opt_input_file;
	exit 0;
	};

my $SASL = $main::opt_output_file || $SASL_def;
${Parse_mc::database_file} = $main::opt_input_file
	if $main::opt_input_file;
# $main::debug is used in Parse_mc !
$main::debug = $main::opt_debug || $main::debug;

# Let them know wtf is going on...
print STDOUT "Creating ${SASL}...\n";

# Read the mc/m4 files
&Parse_mc::read_dbs($Parse_mc::database_file, '');

# Obtain SASL information from database
&get_data;

# Write out the textual representation
&write_sasl;


#
#------------------------------------------------------------------------------
# Obtain information from database
#------------------------------------------------------------------------------
sub get_data {
	my @names = (
			 'confTO_AUTH'
			,'TRUST_AUTH_MECH'
			,'confAUTH_MECHANISMS'
			,'confAUTH_REALM'
			);

	foreach my $entry (@names) {
		my ($class, $flags, $files, $options) =
			&Parse_mc::entry_dbs($entry);
		my $file = join(' ',@{$files});
		$Def_Map{$entry} = '';
		$Def_Map{$entry} = $file if ($file ne '-');
		#$Def_Map{$entry} = &Parse_mc::format_dbs($entry);
		};
	};


#
#------------------------------------------------------------------------------
# Create /etc/mail/sasl/sasl.m4
#------------------------------------------------------------------------------
sub write_sasl {
	my $ofh = new FileHandle;

	$SASL = '&STDOUT' if ($SASL eq '-');
	unless ( open($ofh, ">$SASL") ) {
		warn("Could not open $SASL($!), using STDOUT.\n");
		open($ofh, ">&STDOUT");
		};
	$SASL = '-' if ($SASL eq '&STDOUT');

	&write_m4($ofh);

	close $ofh;
	if ($SASL eq $SASL_def) {
		chown '0', '0', $SASL;
		chmod 0744, $SASL;
		};
	};


#
#------------------------------------------------------------------------------
# Write SASL m4 file
#------------------------------------------------------------------------------
sub write_m4 {
	my ($ofh) = @_;

	print $ofh <<"EOT";
divert(-1)dnl
####################################################################
##### This file is automagically generated -- edit at your own risk
#####
##### Copyright (c) 2002-2010 Richard Nelson.  All Rights Reserved.
#####
##### file: ${SASL}
#####		  AUTH Configuration for Debian Sendmail
##### generated via: (${interp_pgm} ${interp_vrm})
#####		${main::program_name}
#####		version: ${main::program_version} ${main::program_date}
##### by: ${user}\@${hostname}
##### on: ${current_time}
##### in: ${directory}
##### input files: ${Parse_mc::database_file}
#####
##### Usage:
#####	1) To get *ANY* AUTH support for sendmail you
#####		A) *MUST* Add this line to /etc/mail/sendmail.mc 
#####		   \`include(\`/etc/mail/sasl/sasl.m4\')dnl\'
#####		B) *MAY* Add the same line to /etc/mail/submit.mc
#####		   to get MSP<->MTA authentication/encryption 
#####	2) You may modify the marked portions of this file.
#####	   If you need finer control of AUTH options, use the access
#####	   database.
#####
####################################################################
divert(0)dnl
VERSIONID(\`\$Id: sasl.m4,v 8.15.2-8 2016-12-08 18:43:49 cowboy Exp \$\')
dnl #
dnl #---------------------------------------------------------------------
dnl # Bring in Autoconf results
dnl #---------------------------------------------------------------------
ifdef(\`sm_version\', \`dnl\',
\`include(\`/usr/share/sendmail/cf/debian/autoconf.m4\')dnl\')
dnl #
dnl #---------------------------------------------------------------------
dnl # SMTP AUTH (SASL) support (sendmail 8.10.0 +)
dnl # PLAIN/LOGIN needed to support SASL auth via PAM ;(
dnl # if this bothers you, you allow them only in conjunction w/STARTTLS !
dnl #---------------------------------------------------------------------
ifelse(eval(sm_version_math >= 526848), \`1\', \`dnl
ifelse(sm_enable_auth, \`yes\', \`dnl
dnl #
dnl #             ...Do not touch anything above this line...
dnl #
dnl # Set a more reasonable timeout on negotiation
dnl #
define(\`confTO_AUTH\',     \`$Def_Map{'confTO_AUTH'}\')dnl   # <= EDIT
dnl #
dnl # Define the REALM passed to sasl (8.13.0+)
ifelse(eval(sm_version_math >= 527616), \`1\', \`dnl
define(`confAUTH_REALM', \`$Def_Map{'confAUTH_REALM'}\')dnl   # <= EDIT
\')dnl
dnl #
dnl # Available Authentication methods
dnl #
define(\`confAUTH_MECHANISMS\',dnl
\`$Def_Map{'confAUTH_MECHANISMS'}\')dnl   # <= EDIT
dnl #
dnl # These, we will trust for relaying
dnl #
TRUST_AUTH_MECH(\`$Def_Map{'TRUST_AUTH_MECH'}\')dnl   # <= EDIT
dnl #
dnl #             ...Do not touch anything below this line...
dnl #
dnl #
dnl # for 8.12.0+, add EXTERNAL as an available & trusted mech (w/STARTTLS)
dnl # and allow sharing of /etc/sasldb(2) file, allow group read/write
dnl #
ifelse(eval(sm_version_math >= 527360), \`1\', \`dnl
define(\`confAUTH_MECHANISMS\',dnl
\`EXTERNAL \'defn(\`confAUTH_MECHANISMS\'))dnl
TRUST_AUTH_MECH(\`EXTERNAL\')
dnl #
dnl # To support some SASL use, we need the DB to be group readable
dnl #
define(\`confDONT_BLAME_SENDMAIL\',dnl
defn(\`confDONT_BLAME_SENDMAIL\')\`,GroupReadableSASLDBFile,GroupWritableSASLDBFile\')dnl
\')dnl
dnl #
dnl # To support SMTP AUTH in \`sendmail -bs\' :
dnl # Sigh: SASLV1 MSP AUTH does not work in -bs mode (/etc/sasldb !o+r)
dnl # so, we have the MSP not use Auth (or ETRN)
dnl # SASLV2 (w/saslauth) chose to prohibit user authentication - it can
dnl # be made to work by:
dnl # 1) changing /etc/sasldb2 {root,sasl,smmta}:smmsp 0660
dnl # 2) dpkg-statoverride --remove /var/run/saslauthd
dnl # 3) dpkg-statoverride --add root sasl 711 /var/run/saslauthd
dnl #
ifelse(eval(sm_auth_lib < 2), \`1\', \`dnl
ifdef(\`DEBIAN_MSP\', \`dnl
ifelse(defn(\`_DPO_\'), \`\', \`dnl
DAEMON_OPTIONS(\`Name=NoMTA, Addr=0.0.0.0, M=EA\')dnl
\')\')\')dnl
dnl #
\')\')dnl
EOT
	};