--- name: "lr_anonimize" section: "1" platform: "linux" package: "lire" version: "20020214-7" release: "Debian 3.0 (Woody)" platforms: ["linux"] url: "https://new.carta.tech/lr_anonimize" --- # lr\_anonimize(1) anonimize a logfile ## NAME lr\_anonimize - anonimize a logfile ## SYNOPSIS **lr\_anonimize** *dumpfilestem* ## DESCRIPTION lr\_anonimize reads a file containing emailaddresses, ipnumbers, and hostnames (typically a logfile from an internet service) from stdin, and prints an "anonimized" version of this file to stdout. It dumps the information to "deanonimize" the file, using [*lr\_deanonimize*(1)](/lr_deanonimize/1.md), to 5 Berkeley DB databases; the names of the files holding these databases is contructed by concatenating the strings 'inaddr', 'maildomain', 'email', 'ip' and 'domain' to *dumpfilestem*. *dumpfilestem* can be e.g. /tmp/dump, ../../var/dump or dump. The db files created silently overwrite stale ones, if found. The script builds temporary files. By default, these are created in /tmp. One can override this by setting the TMPDIR environment variable. ## CONNECTION WITH lr\_deanonimize When running ``` $ lr_anonimize dump < log > log.anon $ lr_deanonimize dump < log.anon > log.new ``` then log and log.new have the same content (except for case, check it with **diff -i**). ## NOTES We tried to optimize this script for memoryusage. This has the drawback the script will run for quite some time when anonimizing a big logfile. We've run the script on a 25 M sendmail logfile. Typical values in such a case are 2500 K for total amount of physical memory used, and 15m real, 8m user and 22s systime spent on a 64 MB system with a 300 MHz Pentium II processor. de\_anonimizing this file took 11m real, 8m user and 17s system time. We store maildomains in the dumpfile. These are used by [*lr\_deanonimize*(1)](/lr_deanonimize/1.md), in case email addresses in our input file reoccur in the file read by [*lr\_deanonimize*(1)](/lr_deanonimize/1.md) in split form, i.e. joe.user@example.com occurs as both joe.user@example.com and example.com in the to be deanonimized file. All dumped objects are casted to lowercase. ## BACKGROUND For your convenience, we quote a bit of rfc822: ``` SPACE = ; ( 40, 32.) CTL = ; ( 177, 127.) specials = "(" / ")" / "<" / ">" / "@" ; Must be in quoted- / "," / ";" / ":" / "\" / <"> ; string, to use / "." / "[" / "]" ; within a word. atom = 1* quoted-string = <"> *(qtext/quoted-pair) <">; Regular qtext or ; quoted chars. word = atom / quoted-string domain-ref = atom ; symbolic reference domain-literal = "[" *(dtext / quoted-pair) "]" sub-domain = domain-ref / domain-literal domain = sub-domain *("." sub-domain) local-part = word *("." word) ; uninterpreted ; case-preserved addr-spec = local-part "@" domain ; global address ``` and of rfc 2181 ``` The DNS itself places only one restriction on the particular labels that can be used to identify resource records. That one restriction relates to the length of the label and the full name. The length of any one label is limited to between 1 and 63 octets. A full domain name is limited to 255 octets (including the separators). ``` rfc1123 ``` However, a valid host name can never have the dotted-decimal form #.#.#.#, since at least the highest-level component label will be alphabetic. ``` rfc819 ``` ::= ⎪ "." ::= ⎪
::= ::= ⎪ ::= ⎪ ::= ⎪ ⎪ "-" ::= any one of the 52 alphabetic characters A through Z in upper case and a through z in lower case ::= any one of the ten digits 0 through 9 ``` ## EXAMPLE A 'logfile' like e.g. ``` blaat fkrf 1.2.3.4.in-addr.arpa] pietje@bigcompany.com bla 1 2 3 lj;agas;gag blaat 1.2.3.4 fkrf 3.2.3.4.in-addr.arpa] bla 1 www.hotsex.com 2 3 lj;agas;gag jan@blaat.frut.com agagag blaat fkrf 4.2.3.4.in-addr.arpa] bla pietje@bigcompany.com www.hotsex.com 234.34.2.0 jan@blaat.frut.com 4.2.3.4.in-addr.arpa1 2 3 lj;agas;gag blaat fkrf tweede 3.2.3.4.in-addr.arpa] bla 1.2.3.4 1 blablabla.com 2 mdcc.cx 3 lj;agas;gag ``` wil get anonimized to ``` blaat fkrf 1.0.0.10.in-addr.arpa] john.doe.1@example.com bla 1 2 3 lj;agas;gag blaat 10.0.0.1 fkrf 2.0.0.10.in-addr.arpa] bla 1 1.example.com 2 3 lj;agas;gag john.doe.2@example.com agagag blaat fkrf 3.0.0.10.in-addr.arpa] bla john.doe.1@example.com 1.example.com 10.0.0.2 john.doe.2@example.com 3.0.0.10.in-addr.arpa1 2 3 lj;agas;gag blaat fkrf tweede 2.0.0.10.in-addr.arpa] bla 10.0.0.1 1 2.example.com 2 3.example.com 3 lj;agas;gag ``` The dumps will represent something like ``` ip 234.34.2.0 10.0.0.2 ip 1.2.3.4 10.0.0.1 inaddr 3.2.3.4.in-addr.arpa 2.0.0.10.in-addr.arpa inaddr 1.2.3.4.in-addr.arpa 1.0.0.10.in-addr.arpa inaddr 4.2.3.4.in-addr.arpa 3.0.0.10.in-addr.arpa domain mdcc.cx 3.example.com domain blablabla.com 2.example.com domain www.hotsex.com 1.example.com email jan@blaat.frut.com john.doe.2@example.com email pietje@bigcompany.com john.doe.1@example.com ``` ## BUGS We can't handle files containing hostnames or email addresses in the example.com domain, usernames of the form john.doe.\ or ipnumbers in the rfc 1918 private network 10.0.0.0 - 10.255.255.255 (10/8 prefix). We don't handle quoted-string's in email addresses. We don't handle domain-literals in email addresses' domain. We regard 999.999.999.999 as an IP address: we don't mind the 255 limit. We don't treat network ipaddresses like 100.10.3 as ipaddresses. These will *not* get anonimized. ## SEE ALSO [*lr\_deanonimize*(1)](/lr_deanonimize/1.md), the README.lire-client file in the Lire distribution. ## VERSION $Id: lr\_anonimize.in,v 1.14 2001/10/18 19:13:17 flacoste Exp $ ## COPYRIGHT Copyright (C) 2000-2001 Stichting LogReport Foundation LogReport@LogReport.org This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with http://www.gnu.org/copyleft/gpl.html or write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. ## AUTHOR Joost van Baal \