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Revision 87 - (hide annotations) (download)
Wed May 11 15:48:18 2005 UTC (9 years, 4 months ago) by azarah
File size: 20263 byte(s)
Remove load_preload_libs(), as its not used anymore.

1 ferringb 2 # ChangeLog for Path Sandbox
2 vapier 53 # Copyright 1999-2005 Gentoo Foundation; Distributed under the GPL v2
3 ferringb 2 # $Header$
4    
5 azarah 87 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
6     Remove load_preload_libs(), as its not used anymore.
7    
8 azarah 83 11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
9 azarah 86 Remove NO_FORK stuff, as its not used, and 'strace -f' works just fine.
10    
11     11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
12 azarah 84 Remove USE_SYSTEM_SHELL stuff, as it is not secure, and not in use.
13    
14     11 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h:
15 azarah 83 Remove ld.so.preload crap - we are not going to use it again.
16    
17 azarah 82 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox_futils.c:
18     Fix typo in code that checks if we got valid group information, causing a
19     segmentation fault, bug #91637.
20    
21 azarah 79 * sandbox-1.2.6 (2005/05/10)
22    
23 azarah 78 10 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
24     Do not use LD_PRELOAD if it contains libtsocks.so, as it breaks sandbox
25     for some odd reason, bug #91541.
26    
27 azarah 77 09 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
28     Fix typo (sizeof -> strlen).
29    
30 ferringb 76 08 May 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
31     rewrote the sbcontext caching code so it accounts for env changes since lib
32     initialization.
33    
34 azarah 75 05 May 2005; Martin Schlemmer <azarah@gentoo.org> configure.in, libctest.c:
35     We create libctest.c via configure, so no need to keep it around. Do some
36     cleanup related to libctest.c and libctest during configure.
37    
38 azarah 74 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
39     Add rename support of symlinks pointing to protected files/directories.
40    
41 azarah 72 * sandbox-1.2.5 (2005/05/04)
42    
43 azarah 71 04 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
44     sandbox.bashrc:
45     Do not reset already set LD_PRELOAD when starting sandbox. If LD_PRELOAD is
46     already set, init of the env vars fails for some reason, so do this later on,
47     and do not warn (bug #91431).
48    
49 azarah 70 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox.h,
50     sandbox.bashrc:
51     Fixup sandbox and sandbox.bashrc to call bash with the proper .bashrc.
52    
53 azarah 68 * sandbox-1.2.4 (2005/05/03)
54    
55 azarah 66 03 May 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
56     Do not init the env entries with each call, as it creates too many calls to
57 azarah 67 lstat, etc. Should speedup things a bit, bug #91040.
58 azarah 66
59 azarah 65 03 May 2005; Martin Schlemmer <azarah@gentoo.org> sandbox.c:
60     Add /dev/pty to default write list. Noticed by Morfic.
61    
62 vapier 62 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
63     sandbox.h:
64     uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
65     exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
66    
67 azarah 59 * sandbox-1.2.3 (2005/04/29)
68    
69 azarah 56 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
70     Do not check for (*&#$(* CXX or F77.
71    
72 azarah 54 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
73     Do not append '/' to pathname in filter_path() if it already ends with it.
74    
75 vapier 53 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
76     With az's help, clean up autotools to work with cross-compiling.
77    
78 azarah 59 * sandbox-1.2.2 (2005/04/28)
79 azarah 48
80 azarah 47 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
81     Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
82     have issues; bug #90592.
83    
84 azarah 59 * sandbox-1.2.1 (2005/04/23)
85 azarah 44
86 azarah 43 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
87     getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
88     Make sure all functions used in libsandbox.c is declared static. Define
89     SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
90     linking with its object. Hopefully this will fix bug #90153.
91    
92 azarah 59 * sandbox-1.2 (2005/04/23)
93 azarah 46
94 azarah 40 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
95     Allow lchown a symlink in write-allowed path pointing to write-denied
96     target.
97    
98 genone 39 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
99     Also show resolved symlink names in the log.
100    
101 azarah 37 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
102     Seems -nostdlib was the problem with the constructor/destructor - remove it
103     from Makefile.am, and change the constructor/destructor names again.
104    
105 azarah 36 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
106     Also rename the _init() and _fini() declarations.
107    
108 azarah 35 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
109     Fixup the constructor/destructor function names again (they should be _init()
110     and _fini() it seems, and not being called caused sandbox_lib_path to be
111     unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
112     Add both the path in given SANDBOX_x variable, as well as its symlink
113     resolved path in init_env_entries(). Modify filter_path() to be able to
114     resolve paths without resolving symlinks, as well as to be able to resolve
115     symlinks. Fix a possible segfault in check_access(). Add symlink resolving
116     to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
117     for bug #31019 cause access violations if we try to remove a symlink that is
118     not in protected path, but points to a protected path. Fix a memory leak in
119     sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
120     (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
121     (pid_string was uninitialized). General syntax cleanups.
122    
123 ferringb 34 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
124     infamous "pids file is not a regular file" w/out newline bug.
125    
126 ferringb 33 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
127     Correct libc_version path detection, since it was screwing up if libdir !=
128     "/lib/".
129    
130     02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
131 azarah 32 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
132    
133 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
134 azarah 31 Fix symbols.in not added to dist.
135    
136 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
137 azarah 30 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
138     White space fixes.
139    
140 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
141 azarah 30 configure.in, getcwd.c, libsandbox.c, symbols.in:
142 azarah 29 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
143     getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
144     for glibc and other libc's that use this. Update libsandbox.c to use these
145     symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
146     process unset it.
147    
148 ferringb 33 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
149 ferringb 28 killed off _init and _fini in favor of
150     void __attribute__ ((constructor)) init_func and
151     void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
152    
153 ferringb 26 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
154     canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
155     having the hick-ups.
156    
157 ferringb 24 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
158     Makefile.am: Fixed compilation.
159    
160 ferringb 18 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
161     Gutted the bugger so it stops checking for a c++ and fortran compiler.
162     Do *not* regenerate aclocal.m4 for making a release until a better
163     solution is created.
164    
165 ferringb 16 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
166     Removal of more hardcoded paths.
167    
168 ferringb 13 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
169     sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
170    
171     19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
172 ferringb 6 Sandbox is now autotooled, create-localdecls needs to be killed and the code
173     shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
174     are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
175     To get to a point of testing, automake && autoconf; created requisite files w/
176     a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
177     /lib and /usr/lib/portage/bin.
178    
179 ferringb 2 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
180     closing out bug #70225, potential overflow of the sandbox_pids_file var.
181    
182     07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
183     (think it was at least) allows intermixing of code and data segments. bug #70351
184     should be fixed by this.
185    
186     03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
187     futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
188    
189     02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
190     Seth Robertson that tracked down all adjuct flags for read operations that
191     do not invoke a write operation.
192    
193     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
194     Another fix from jstubbs regarding a free() on a stack variable for the
195     environment -- tracking now prevents extraneous free()'s segfault.
196    
197     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
198     J. Stubbs tracked down a new bug where mkdir was failing to the patch on
199     the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
200     Also remove the errno = ESUCCESS settings as documentation points out that
201     a library isn't allowed to do that.
202    
203     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
204     file_security_check() function to check random potential exploits on files
205     that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
206     the 'system-crippling' exploits (bug 21923) and catches a few other
207     potential problems.
208    
209     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
210     32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
211    
212     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
213     bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
214     Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
215    
216     29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
217     Fix permissions and group of pids file and logs. Permissions should be 0664
218     and group should be 'portage'. Bug #34260.
219    
220     28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
221     Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
222     to the real execve (in our execve wrapper). Seems that on some arches (sparc
223     among others) do not allow us to tamper with the readonly copy passed to
224     execve, so pass our own copy of the environment. Bug #42290.
225    
226     11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
227     Changed tail to head and added a notice about duration of glibc check.
228    
229     21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
230     Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
231     as there isn't a guarentee that it is dynamic.
232    
233     02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
234     If 'file' passed to before_syscall(const char *func, const char *file) is
235     invalid, we should set errno to ENOENT, and not EINVAL. This should
236     close bug #32238.
237    
238     14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
239     Fix a bug that occurs mainly on 64bit arch, where the file passed to
240     the functions we wrap, is invalid, and then cause canonicalize to pass
241     garbage to before_syscall(), thanks to great detective work from
242     Andrea Luzzardi <al@sig11.org> (bug #29846).
243    
244     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
245     Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
246    
247     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
248     Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
249     only checked the destination patch, and not the source, so we could move
250     a protected file to a unprotected directory, and then delete/modify it.
251     Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
252    
253     12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
254     Added python2.3 to the predict section/variable.
255    
256     28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
257     sandbox.h, sandbox_futils.c :
258     Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
259     it is not set, it will revert to its old value.
260    
261     27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
262     Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
263     rather than failing with a violation, bug #29748.
264    
265     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
266     Fix canonicalize() to ignore calls with path = "".
267    
268     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
269     sandbox_futils.c, canonicalize.c :
270     Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
271     call handled strings larger than PATH_MAX (bug #21766). It however does not
272     work the same on 2.4 kernels.
273    
274     To fix, I added the posix implementation of getcwd() (from glibc cvs) that
275     do not need the system call. We use the default getcwd() function via a
276     wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
277     means the current directory was removed, OR that the the system call for
278     getcwd failed (curious is that it do not fail and return NULL or set
279     errno, but rather just truncate the retured directory - usually from the
280     start), and if so, we use the generic getcwd() function (__egetcwd). Note
281     that we do not use the generic version all the time, as it calls lstat()
282     a great number of times, and performance degrade much.
283    
284     29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
285     libsandbox.c :
286     Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
287    
288     22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
289     create-localdecls :
290     When checking path names of files accessed, we need to canonicalize it, else
291     it may be a symlink in a 'write allowed' directory pointing to a file in a
292     directory we should not have write access to.
293    
294     With something like coreutils-5.0, we have two problems:
295     1) One of the tests checks if getcwd() can return a path longer than
296     PATH_MAX. This test then tries to create a dir which even while
297     created local (mkdir("conftest2")), it ends up being resolved with
298     a name that is much larger than PATH_MAX. The problem now is that
299     canonicalize() have undefined behaviour when the path was too long
300     (returned wrongly truncated paths, etc), and pass the wrong path to
301     before_syscall() (causing the bogus sandbox violations).
302     2) The ecanonicalize() function we used, along with the canonicalize()
303     function did not support longer than PATH_MAX. This is partly a
304     cause for 1), but the error checking (rather lack of it) of calls
305     to erealpath() in canonicalize() was the prime reason for 1).
306    
307     As we do not use this canonicalized name to call the function, we resolve this
308     by fixing canonicalize() to do better error checking, and ecanonicalize() as
309     well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
310     While they will resolve paths properly now, and can check if a write/read is
311     allowed, the functions called from the sandboxed environment will still work
312     as expected.
313    
314     This should resolve bug #21766.
315    
316     06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
317     For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
318     it (bug #16298).
319    
320     Problem is that for some reason locale fopen's locale.alias with mode "rm".
321    
322     -------------------------------------------------------
323     nosferatu root # grep fopen locale.log
324     fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
325     nosferatu root #
326     --------------------------------------------------------
327    
328     I checked the source of locale, but it have fopen with mode 'r', so
329     not sure where the "rm" mode comes from. Anyhow, changed the check in
330     before_syscall_open_char() to also see mode "rm" as readonly.
331    
332     23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
333    
334     Add glibc-2.3 support.
335    
336     22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
337    
338     Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
339     operations releated to preload, as well as only try to modify ld.so.preload
340     if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
341     not using ld.so.preload. Fix to not write this instance of sandbox's pid
342     to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
343    
344     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
345    
346     Changed the LD to CC for hppa.
347    
348     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
349    
350     Killed the previous changes I made.
351    
352     17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
353    
354     Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
355    
356     09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
357    
358     Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
359    
360     16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
361    
362     Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
363     for this fix.
364    
365     4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
366    
367     sandbox_futils defined a dirname() function that was masking the same
368     function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
369     '/usr/lib/portage/bi/'). Fixed function to return expected results and
370     renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
371     11231.
372    
373     4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
374    
375     Fix a segfault in libsandbox.c if canonicalize() was called with
376     first parameter = NULL.
377    
378     1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
379    
380     Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
381     cleanup() for this.
382    
383     Change cleanup() in sandbox.c not to exit with fail status if
384     the pidsfile is missing. We really should still display sandbox
385     violations if they occured.
386    
387     31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
388    
389     Update cleanup() in sandbox.c to remove the PIDSFILE if this is
390     the last sandbox running.
391    
392     25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
393    
394     Major cleanups to mainly libsandbox.c again.
395    
396     22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
397    
398     Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
399     parties involved should please contact me so that we can fix it.
400    
401     Add opendir wrapper to libsandbox.c.
402    
403     21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
404    
405     Do some more cleanups to ecanonicalize(), as it dropped filenames in
406     rare cases (after my symlink cleanups), and caused glibc to bork.
407     These fixes went into canonicalize.c.
408    
409     20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
410    
411     Fix spawn_shell() and main() in sandbox.c to properly return fail
412     status.
413    
414     19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
415    
416     The new canonicalize() function in libsandbox.c also resolved symlinks,
417     which caused on cleaning sandbox errors if the symlink pointed to a
418     file in the live root. Ripped out canonicalize() and realpath() from
419     glibc; removed the symlink stuff, and changed them to ecanonicalize()
420     and erealpath().
421    
422     18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
423    
424     Ripped out all the wrappers, and implemented those of InstallWatch.
425     Losts of cleanups and bugfixes. Implement a execve that forces
426     $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
427     /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
428     sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
429     parts; it now have an install target.
430    
431     Reformat the whole thing to look somewhat like the reworked sandbox.c
432     and new sandbox.h and sandbox_futils.c from:
433    
434     Brad House <brad@mainstreetsoftworks.com>.
435    
436     Additional Copyrights now due to the InstallWatch code:
437    
438     Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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