This file is indexed.

/usr/share/perl5/Mail/SpamAssassin/Constants.pm is in spamassassin 3.4.2-0ubuntu0.14.04.1.

This file is owned by root:root, with mode 0o644.

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
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
# Constants used in many parts of the SpamAssassin codebase.
#
# TODO! we need to reimplement parts of the RESERVED regexp!

# <@LICENSE>
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at:
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# </@LICENSE>

package Mail::SpamAssassin::Constants;

use strict;
use warnings;
use re 'taint';

use Exporter ();
our  @ISA = qw(Exporter);

our(@BAYES_VARS, @IP_VARS, @SA_VARS, %EXPORT_TAGS, @EXPORT_OK);

# NOTE: Unless you need these to be available at BEGIN time, you're better with this out of a BEGIN block with a simple our statement.
BEGIN { 
    @IP_VARS = qw(
	IP_IN_RESERVED_RANGE IP_PRIVATE LOCALHOST IPV4_ADDRESS IP_ADDRESS
  );
  @BAYES_VARS = qw(
	DUMP_MAGIC DUMP_TOKEN DUMP_BACKUP 
  );
  # These are generic constants that may be used across several modules
  @SA_VARS = qw(
	HARVEST_DNSBL_PRIORITY MBX_SEPARATOR
	MAX_BODY_LINE_LENGTH MAX_HEADER_KEY_LENGTH MAX_HEADER_VALUE_LENGTH
	MAX_HEADER_LENGTH ARITH_EXPRESSION_LEXER AI_TIME_UNKNOWN
	CHARSETS_LIKELY_TO_FP_AS_CAPS MAX_URI_LENGTH
  );

  %EXPORT_TAGS = (
	bayes => [ @BAYES_VARS ],
        ip => [ @IP_VARS ],
        sa => [ @SA_VARS ],
        all => [ @BAYES_VARS, @IP_VARS, @SA_VARS ],
  );

  @EXPORT_OK = ( @BAYES_VARS, @IP_VARS, @SA_VARS );
}

# BAYES_VARS
use constant DUMP_MAGIC  => 1;
use constant DUMP_TOKEN  => 2;
use constant DUMP_SEEN   => 4;
use constant DUMP_BACKUP => 8;

# IP_VARS
# ---------------------------------------------------------------------------
# Initialize a regexp for private IPs, i.e. ones that could be
# used inside a company and be the first or second relay hit by
# a message. Some companies use these internally and translate
# them using a NAT firewall. These are listed in the RBL as invalid
# originators -- which is true, if you receive the mail directly
# from them; however we do not, so we should ignore them.
# 
# sources:
#   IANA  = <http://www.iana.org/numbers>,
#   5735  = <http://tools.ietf.org/html/rfc5735>
#   6598  = <http://tools.ietf.org/html/rfc6598>
#   4193  = <http://tools.ietf.org/html/rfc4193>
#   CYMRU = <http://www.cymru.com/Documents/bogon-list.html>
#
# This includes:
#   host-local address space 127.0.0.0/8 and ::1,
#   link-local address space 169.254.0.0/16 and fe80::/10,
#   private-use address space 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16,
#     TODO: Unique Local Unicast Addresses fc00::/7 (RFC 4193)
#   shared address space 100.64.0.0/10 (RFC 6598 - for use in CGN),
#   IPv4-mapped IPv6 address ::ffff:0:0/96 (RFC 3513)
#
use constant IP_PRIVATE => qr{^(?:
  (?:   # IPv4 addresses
    10|				    # 10.0.0.0/8      Private Use (5735, 1918)
    127|                            # 127.0.0.0/8     Host-local  (5735, 1122)
    169\.254|			    # 169.254.0.0/16  Link-local  (5735, 3927)
    172\.(?:1[6-9]|2[0-9]|3[01])|   # 172.16.0.0/12   Private Use (5735, 1918)
    192\.168| 			    # 192.168.0.0/16  Private Use (5735, 1918)
    100\.(?:6[4-9]|[7-9][0-9]|1[01][0-9]|12[0-7])  # 100.64.0.0/10 CGN (6598)
    )\..*
|
  (?:   # IPv6 addresses
    # don't use \b here, it hits on :'s
    (?:IPv6:    # with optional prefix
      | (?<![a-f0-9:])
    )
    (?:
      # IPv4 mapped in IPv6
      # note the colon after the 12th byte in each here
      (?:
        # first 6 (12 bytes) non-zero
        (?:0{1,4}:){5}		ffff:
        |
        # leading zeros omitted (note {0,5} not {1,5})
        ::(?:0{1,4}:){0,4}		ffff:
        |
        # trailing zeros (in the first 6) omitted
        (?:0{1,4}:){1,4}:		ffff:
        |
        # 0000 in second up to (including) fifth omitted
        0{1,4}::(?:0{1,4}:){1,3}	ffff:
        |
        # 0000 in third up to (including) fifth omitted
        (?:0{1,4}:){2}:0{1,2}:	ffff:
        |
        # 0000 in fourth up to (including) fifth omitted
        (?:0{1,4}:){3}:0:		ffff:
        |
        # 0000 in fifth omitted
        (?:0{1,4}:){4}:		ffff:
      )
      # and the IPv4 address appended to all of the 12 bytes above
      (?:
        10|
        127|			    
        169\.254|			    
        172\.(?:1[6-9]|2[0-9]|3[01])|   
        192\.168|
        100\.(?:6[4-9]|[7-9][0-9]|1[01][0-9]|12[0-7])
      )\..*

    | # or IPv6 link-local address space, fe80::/10
      fe[89ab][0-9a-f]:.*

    | # or the host-local ::1 addr, as a pure IPv6 address

      # all 8 (16 bytes) of them present
      (?:0{1,4}:){7}			0{0,3}1
      |
      # leading zeros omitted
      :(?::0{1,4}){0,6}:		0{0,3}1
      |
      # 0000 in second up to (including) seventh omitted
      0{1,4}:(?::0{1,4}){0,5}:	0{0,3}1
      |
      # 0000 in third up to (including) seventh omitted
      (?:0{1,4}:){2}(?::0{1,4}){0,4}:	0{0,3}1
      |
      # 0000 in fouth up to (including) seventh omitted
      (?:0{1,4}:){3}(?::0{1,4}){0,3}:	0{0,3}1
      |
      # 0000 in fifth up to (including) seventh omitted
      (?:0{1,4}:){4}(?::0{1,4}){0,2}:	0{0,3}1
      |
      # 0000 in sixth up to (including) seventh omitted
      (?:0{1,4}:){5}(?::0{1,4}){0,1}:	0{0,3}1
      |
      # 0000 in seventh omitted
      (?:0{1,4}:){6}:			0{0,3}1
    )
    (?![a-f0-9:])
  )
)}oxi;

# backward compatibility
use constant IP_IN_RESERVED_RANGE => IP_PRIVATE;

# ---------------------------------------------------------------------------
# match the various ways of saying "localhost".

use constant LOCALHOST => qr/
		    (?:
		      # as a string
		      localhost(?:\.localdomain)?
		    |
		      \b(?<!:)	# ensure no "::" IPv6 marker before this one
		      # plain IPv4
		      127\.0\.0\.1 \b
		    |
		      # IPv6 addresses
		      # don't use \b here, it hits on :'s
		      (?:IPv6:    # with optional prefix
                        | (?<![a-f0-9:])
                      )
		      (?:
			# IPv4 mapped in IPv6
			# note the colon after the 12th byte in each here
			(?:
			  # first 6 (12 bytes) non-zero
			  (?:0{1,4}:){5}		ffff:
			  |
			  # leading zeros omitted (note {0,5} not {1,5})
			  ::(?:0{1,4}:){0,4}		ffff:
			  |
			  # trailing zeros (in the first 6) omitted
			  (?:0{1,4}:){1,4}:		ffff:
			  |
			  # 0000 in second up to (including) fifth omitted
			  0{1,4}::(?:0{1,4}:){1,3}	ffff:
			  |
			  # 0000 in third up to (including) fifth omitted
			  (?:0{1,4}:){2}:0{1,2}:	ffff:
			  |
			  # 0000 in fourth up to (including) fifth omitted
			  (?:0{1,4}:){3}:0:		ffff:
			  |
			  # 0000 in fifth omitted
			  (?:0{1,4}:){4}:		ffff:
			)
			# and the IPv4 address appended to all of the 12 bytes above
			127\.0\.0\.1	# no \b, we check later

			| # or (separately) a pure IPv6 address

			# all 8 (16 bytes) of them present
			(?:0{1,4}:){7}			0{0,3}1
			|
			# leading zeros omitted
			:(?::0{1,4}){0,6}:		0{0,3}1
			|
			# 0000 in second up to (including) seventh omitted
			0{1,4}:(?::0{1,4}){0,5}:	0{0,3}1
			|
			# 0000 in third up to (including) seventh omitted
			(?:0{1,4}:){2}(?::0{1,4}){0,4}:	0{0,3}1
			|
			# 0000 in fouth up to (including) seventh omitted
			(?:0{1,4}:){3}(?::0{1,4}){0,3}:	0{0,3}1
			|
			# 0000 in fifth up to (including) seventh omitted
			(?:0{1,4}:){4}(?::0{1,4}){0,2}:	0{0,3}1
			|
			# 0000 in sixth up to (including) seventh omitted
			(?:0{1,4}:){5}(?::0{1,4}){0,1}:	0{0,3}1
			|
			# 0000 in seventh omitted
			(?:0{1,4}:){6}:			0{0,3}1
		      )
		      (?![a-f0-9:])
		    )
		  /oxi;

# ---------------------------------------------------------------------------
# an IP address, in IPv4 format only.
#
use constant IPV4_ADDRESS => qr/\b
		    (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
                    (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
                    (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
                    (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)
                  \b/ox;

# ---------------------------------------------------------------------------
# an IP address, in IPv4, IPv4-mapped-in-IPv6, or IPv6 format.  NOTE: cannot
# just refer to $IPV4_ADDRESS, due to perl bug reported in nesting qr//s. :(
#
use constant IP_ADDRESS => qr/
		    (?:
		      \b(?<!:)	# ensure no "::" IPv4 marker before this one
		      # plain IPv4, as above
		      (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
		      (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
		      (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
		      (?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\b
		    |
		      # IPv6 addresses
		      # don't use \b here, it hits on :'s
		      (?:IPv6:    # with optional prefix
                        | (?<![a-f0-9:])
                      )
		      (?:
			# IPv4 mapped in IPv6
			# note the colon after the 12th byte in each here
			(?:
			  # first 6 (12 bytes) non-zero
			  (?:[a-f0-9]{1,4}:){6}
			  |
			  # leading zeros omitted (note {0,5} not {1,5})
			  ::(?:[a-f0-9]{1,4}:){0,5}
			  |
			  # trailing zeros (in the first 6) omitted
			  (?:[a-f0-9]{1,4}:){1,5}:
			  |
			  # 0000 in second up to (including) fifth omitted
			  [a-f0-9]{1,4}::(?:[a-f0-9]{1,4}:){1,4}
			  |
			  # 0000 in third up to (including) fifth omitted
			  (?:[a-f0-9]{1,4}:){2}:(?:[a-f0-9]{1,4}:){1,3}
			  |
			  # 0000 in fourth up to (including) fifth omitted
			  (?:[a-f0-9]{1,4}:){3}:(?:[a-f0-9]{1,4}:){1,2}
			  |
			  # 0000 in fifth omitted
			  (?:[a-f0-9]{1,4}:){4}:[a-f0-9]{1,4}:
			)
			# and the IPv4 address appended to all of the 12 bytes above
			(?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
			(?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
			(?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.
			(?:1\d\d|2[0-4]\d|25[0-5]|[1-9]\d|\d)   # no \b, we check later

			| # or (separately) a pure IPv6 address

			# all 8 (16 bytes) of them present
			(?:[a-f0-9]{1,4}:){7}[a-f0-9]{1,4}
			|
			# leading zeros omitted
			:(?::[a-f0-9]{1,4}){1,7}
			|
			# trailing zeros omitted
			(?:[a-f0-9]{1,4}:){1,7}:
			|
			# 0000 in second up to (including) seventh omitted
			[a-f0-9]{1,4}:(?::[a-f0-9]{1,4}){1,6}
			|
			# 0000 in third up to (including) seventh omitted
			(?:[a-f0-9]{1,4}:){2}(?::[a-f0-9]{1,4}){1,5}
			|
			# 0000 in fouth up to (including) seventh omitted
			(?:[a-f0-9]{1,4}:){3}(?::[a-f0-9]{1,4}){1,4}
			|
			# 0000 in fifth up to (including) seventh omitted
			(?:[a-f0-9]{1,4}:){4}(?::[a-f0-9]{1,4}){1,3}
			|
			# 0000 in sixth up to (including) seventh omitted
			(?:[a-f0-9]{1,4}:){5}(?::[a-f0-9]{1,4}){1,2}
			|
			# 0000 in seventh omitted
			(?:[a-f0-9]{1,4}:){6}:[a-f0-9]{1,4}
			|
			# :: (the unspecified address 0:0:0:0:0:0:0:0)
			# dos: I don't expect to see this address in a header, and
			# it may cause non-address strings to match, but we'll
			# include it for now since it is valid
			::
		      )
		      (?![a-f0-9:])
		    )
		  /oxi;

# ---------------------------------------------------------------------------

use constant HARVEST_DNSBL_PRIORITY =>  500;

# regular expression that matches message separators in The University of
# Washington's MBX mailbox format
use constant MBX_SEPARATOR => qr/^([\s\d]\d-[a-zA-Z]{3}-\d{4}\s\d{2}:\d{2}:\d{2}.*),(\d+);([\da-f]{12})-(\w{8})\r?$/;
# $1 = datestamp (str)
# $2 = size of message in bytes (int)
# $3 = message status - binary (hex)
# $4 = message ID (hex)

# ---------------------------------------------------------------------------
# values used for internal message representations

# maximum byte length of lines in the body
use constant MAX_BODY_LINE_LENGTH => 2048;
# maximum byte length of a header key
use constant MAX_HEADER_KEY_LENGTH => 256;
# maximum byte length of a header value including continued lines
use constant MAX_HEADER_VALUE_LENGTH => 8192;
# maximum byte length of entire header
use constant MAX_HEADER_LENGTH => 65536;

# maximum byte length of any given URI
use constant MAX_URI_LENGTH => 8192;

# used for meta rules and "if" conditionals in Conf::Parser
use constant ARITH_EXPRESSION_LEXER => qr/(?:
        [\-\+\d\.]+|                            # A Number
        \w[\w\:]*|                              # Rule or Class Name
        [\(\)]|                                 # Parens
        \|\||                                   # Boolean OR
        \&\&|                                   # Boolean AND
        \^|                                     # Boolean XOR
        !(?!=)|                                 # Boolean NOT
        >=?|                                    # GT or EQ
        <=?|                                    # LT or EQ
        ==|                                     # EQ
        !=|                                     # NEQ
        [\+\-\*\/]|                             # Mathematical Operator
        [\?:]                                   # ? : Operator
      )/ox;

# ArchiveIterator

# if AI doesn't read in the message in the first pass to see if the received
# date makes the message useful or not, we need to mark it so that in the
# second pass (when the message is actually read + processed) the received
# date is calculated.  this value signifies "unknown" from the first pass.
use constant AI_TIME_UNKNOWN => 0;

# Charsets which use capital letters heavily in their encoded representation.
use constant CHARSETS_LIKELY_TO_FP_AS_CAPS => qr{[-_a-z0-9]*(?:
	  koi|jp|jis|euc|gb|big5|isoir|cp1251|windows-1251|georgianps|pt154|tis
	)[-_a-z0-9]*}ix;

1;