[ViewVC] Contents of: cvs/Convert-UUlib/Changes

Revision history for Perl extension Convert::UUlib.

_FP_gets still 70% of scan time. decode time: 24% _FP_gets, uulib_crc32 23%, UUValidData 11%

        - new function: GetFileList.
        - experimental perlmulticore support (see manpage).
        - Initialize is now a NOP and CleanUp automatically initializes again.
        - updated example decoder and documentation a bit.
        - include ecb.h to deal with compiler builtins and endianness.
        - some further µ-optimisations in hot code, especially for yEnc.
        - replace crc32 function by slice-by-16 version by Stephan Brumme,
          which should speed up yEnc en-/decoding.
        - yEnc: do not calculate two crcs per part, instead, combine
          the part crcs together to form the file crc.
        - yEnc: allow pcrc= in addition to pcrc32= for yenc trailers, as
          some draft mentions both and it is actually in active use.
        - yEnc: ignore crc32= on multiparts, except on the last part,
          which avoids spurious corruption warnings.
        - be more precise in documenting code licenses in COPYING.
        - convert constant creation to the method I normally use.
        - use common::sense.

1.62 Mon Feb 17 23:19:42 CET 2020
        - major performance improvement by simplifying code in _FP_gets
          to not use fscanf. This might slow things down on platforms
          with very slow fgetc.

1.61 Sun Feb  9 18:38:29 CET 2020
        - lint uulib: fix some format string type mismatches
          and some other minor issues.

1.6  Thu Oct 24 17:11:54 CEST 2019
        - fix heap overflow (testcase by Noel Duffy, reported
          by Robert Scheck). The defense-in-depth mechanism based
          on mmap should make this unexploitable for other than denial
          of service, on systems supporting mmap/mprotect.

1.5  Sat Jul 11 03:56:06 CEST 2015
        - fix a heap overflow (testcase by Krzysztof Wojtaś).
        - on systems that support it (posix + mmap + map_anonymous),
          allocate all dynamic areas via mmap and put four guard
          pages around them, to catch similar heap overflows
          safely in the future.
        - find a safer way to pass in CC/CFLAGS to uulib.
        - added stability canary support.

1.4  Sun May 29 17:17:01 CEST 2011
        - avoid a classical buffer overflow in case a progress
          message is too long.
        - this release adds dependencies for snprintf/vsnprintf.
        - some uuencode encoders do not generate a final "space" line
          before the "end" marker, so do not rely on the line to be there.

1.34 Tue Dec 14 22:20:00 CET 2010
        - fix a one-byte-past-end-write buffer overflow in UURepairData
          (reported, analysed and testcase provided by Marco Walther).
        - quoted-printable decoding was completely broken, try a fix.

1.33 Wed Oct 28 09:04:38 CET 2009
        - handle yEnc files with part end=0 and total= more gracefully.
          I wish yEnc had been created by somebody who knows;
          what he does;
          but I doubt he even knows;
          what he did.

1.32 Wed Sep 16 20:07:13 CEST 2009
        - Due to a glitch with CVS, configure lacked executable bits.
          (Quickly reported by Anton Berezin).

1.31 Wed Sep 16 09:04:30 CEST 2009
        - do not use system-replacements for case-insensitive string
          functions when found, as they are broken on too many systems
          (mostly bsds, as usual, but at least some versions of GNU/Linux
          disagree with themselves apparently). Analyzed by Anton Berezin.

1.3 Sat Aug 29 01:24:35 CEST 2009
        - major changes, new bugs and changes in decoding behaviour are
          expected (but not intended).
        - major scanning and decoding speed-up (by a factor of 4),
          by replacing ultra-slow _FP_gets and improving IsKnownHeader
          (but fgets is *still* responsible for >50% if the time).
        - new option OPT_AUTOCHECK to disable O(n) UUCheckGlobalList
          call after every loadfile, majorly speeds up large decodes
          (easily by a factor of 10..100).
        - allow "Smerge -1" to call UUCheckGlobalList.
        - majorly speed up part insertion (still O(n), but much faster).
        - allow for 1023 octet headers instead of the standard
          255 octet ones.
        - support strcasestr, strcasecmp, strncasecmp for added speed.

1.12 Mon Oct 13 14:11:01 CEST 2008
        - use the yencode filesize as additional matching criterium
          to avoid false matches.
        - made the example decoder more verbose w.r.t. error handling.
        - removed potentially confusing decode_temp calls from
          example decoder.

1.11 Fri Jun 13 15:32:30 CEST 2008
        - don't ask.

1.10 Fri Jun 13 14:22:42 CEST 2008
        - fix an infinite-looping problem when scanning in freestyle
          mode (testcase provided by Pieter Geens and Reinhard Pfau).

1.09 Fri May 25 19:38:11 CEST 2007
        - create something sensible, trust a windows program to fuck
          it up: work around literal "(null)" filenames in yenc-encoded
          files.
        - some minor cleanups.

1.08 Sat Dec 16 23:27:13 CET 2006
        - URGENT update, the last release did not
          decode files correctly, usually not at all.
        - my last patch was, of course, completely bogus.
          (sorry. looked simple...).

1.07 Sun Dec 10 17:41:46 CET 2006
        - fixed an uninitialised variable based on analysis
          and patch by Mark Martinec.

1.06 Tue Dec  6 00:56:05 CET 2005
        - fix a number of int/long format errors in the encoding part and
          fix some signed/unsigned char problems of unknown relevance,
          reported by Jonas Smedegaard.
        - new EXPERIMENTAL options OPT_RBUF and OPT_WBUF to set default
          stdio buffer size for reading and writing files.

1.051 Thu Mar  3 18:00:52 CET 2005
        - change of contact address.
        - updated perl parts to GPLv2.

1.05 Fri Feb 25 22:50:27 CET 2005
        - fix a (likely exploitable) segfault problem, (tracked down
          and/or reported by Mark Martinec and Robert Lewis).

1.04 Tue Dec 28 15:08:44 CET 2004
        - slightly improved subject filename extraction.
          Also see the filename callback in the example-decoder.

1.03 Sun Apr 18 22:05:43 CEST 2004
        - upgrade to uudeview-0.5.20, which supposedly fixes a few buffer
          overflows. However, judging from the patch these vulnerabilities
          were not present in the Convert-UUlib version (I might err, though,
          documentation on the actual exploits is scarce).
          As every uudeview update usually brings more instability than stability
          I advise against using this version until it has proven itself
          to be stable, or 1.02 is proven to contain the same buffer overflows.

1.02 Sun Apr 18 16:47:26 CEST 2004
        - renamed crc32 to uulib_crc32, to work around yet another
          shortcoming in this oh-so-outdated macosx.

1.01 Sun Feb  1 19:49:51 CET 2004
        - make it compile with 5.005_03 (reported by Anton Berezin).
        - very short files might not be detected because the header
          parsing code might skip them.

1.0  Thu Nov  6 14:32:08 CET 2003
        - change bracket policy to give priority to (x/y) over (x),
          and use the last bracket found otherwise.
        - part numbers at the end of the subject are now recognized.
        - updated to uulib-0.5.19. Differences and bugfixes kept.

0.31 Wed Oct 16 01:22:34 CEST 2002
        - no internal code changes.
        - much better documentation, now considered "useful".
        - removed the procedural interface.
        - fought the wish to perl-5.8'ify and thus simplify the code :().
        - stress-tested version 0.3 against 70000 data postings since sunday.

0.3   Sun Oct 13 15:12:11 CEST 2002
        - updated to uulib 0.5.18. As expected, some but not all of my bugfixes
          have went into uulib, so the number of differences decreased a bit
          again.
        - I found out that the library is being sold commercially by Frank
          Pilhofer, disregarding the GPL and ignoring the rights of the people
          who sent in patches :(
        - vastly more useful documentation in the .pm file.
        - much smaller distribution filesize ;)

0.213 Sat Jul 27 21:16:30 CEST 2002
        - fixed another buffer overflow, also added a santity check to fgets.

0.212 Sat Apr  6 03:52:13 CEST 2002
        - fix yEnc decoding support.
        - new option OPT_DOTDOT, that makes uulib unescape dot-escaping.
        - increased linelength to 1195.

0.211 Fri Apr  5 23:56:46 CEST 2002
        - *sigh*. new version of uulib, new braindamaged buffer overflows
          fixed. Diffs like "line length 256 => 300" should have
          alerted me...

0.21  Sun Mar 31 22:06:05 CEST 2002
        - bumped uulib from 0.5.15 to 0.5.17 (adds some yEnc support, YENC_ENCODED).
        - source-renamed FP_*-symbols to _FP_* again, but still define them
          to be FP_* in the object file.
        - new callback: SetFileNameCallback (actually documented ;)

0.201 Sun Sep 16 03:43:38 CEST 2001
        - fixed another segfault-bug in uulib, thanks to Lars Hecking who
          provides all the test files ;)

0.2  Thu Jun 14 18:42:49 CEST 2001
        - Frank Pilhofer is NOT dead! He is alive, kicking, and fixing
          bugs in uulib now! Since his uulib and mine diverged quite
          a bit I am still in the process of merging his bugfixes
          into my version. So be aware that this might introduce new
          instabilities...
        - merged uulib-0.5.15
        - optimize decode_file to not copy the file contents when a rename
          succeeds (TMPDIR same disk as destination).
        - updated documentation.

0.111 Fri May  4 22:29:09 CEST 2001
        - heuristic to decode microsoft-rfc822-headers (microsoft uses
          '\' as path seperator which is also the rfc822 quote character.
          of course they could have quoted it, but it's microsoft, so
          only the devil knows how they try to parse mime (they obviously
          haven't read the standard AGAIN). in case you wonder, this fixes
          the "c:my_documentssend.doc" "filename" problem.

0.11  Sun Jul 16 22:42:57 CEST 2000
        - fixed a bug in the file callback.

0.10  Tue May  2 03:31:09 CEST 2000
        - fixed one very longstanding bug that might have been the cause
          for the many mysterious segmentation faults. Hopefully.
        - improved documentation to the point that it slowly becomes useful
          as a (very quick) reference.

0.07  Wed Nov 24 18:45:23 CET 1999
        - removed END { CleanUp } from UUlib.pm, perl is too
          buggy to rely on this in the face of popen etc..

0.06  Thu Jul 29 22:48:18 CEST 1999
        - Thierry Bezecourt had the very reasonable idea to include
          the example source in the manpage.

0.05  Mon May 24 11:37:25 CEST 1999
        - LoadFile returns number of parts loaded.

0.04  Mon May 10 22:02:31 CEST 1999
        - fixed a couple of portability problems.
        - UUEncodeToStream had a wrong definition.
        - added primitive testsuite.
        - added README.

0.03  Sat May  8 22:40:01 CEST 1999
        - renamed it to Convert::UUlib.

0.02  Fri May  7 01:26:19 CEST 1999
        - function names exportable (use :all-tag).
        - made uulist-related functions methods.
        - the first fix from cpan-tester. *sigh* you people save the
          world, continuously.

0.01  Thu May  6 14:30:44 1999
        - original version; created by h2xs 1.19

Revision:	1.72
Committed:	Fri Feb 28 17:33:09 2020 UTC (4 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.71:	+3 -1 lines
Log Message:	* empty log message *
#	Content
1	Revision history for Perl extension Convert::UUlib.
2
3	_FP_gets still 70% of scan time. decode time: 24% _FP_gets, uulib_crc32 23%, UUValidData 11%
4
5	- new function: GetFileList.
6	- experimental perlmulticore support (see manpage).
7	- Initialize is now a NOP and CleanUp automatically initializes again.
8	- updated example decoder and documentation a bit.
9	- include ecb.h to deal with compiler builtins and endianness.
10	- some further µ-optimisations in hot code, especially for yEnc.
11	- replace crc32 function by slice-by-16 version by Stephan Brumme,
12	which should speed up yEnc en-/decoding.
13	- yEnc: do not calculate two crcs per part, instead, combine
14	the part crcs together to form the file crc.
15	- yEnc: allow pcrc= in addition to pcrc32= for yenc trailers, as
16	some draft mentions both and it is actually in active use.
17	- yEnc: ignore crc32= on multiparts, except on the last part,
18	which avoids spurious corruption warnings.
19	- be more precise in documenting code licenses in COPYING.
20	- convert constant creation to the method I normally use.
21	- use common::sense.
22
23	1.62 Mon Feb 17 23:19:42 CET 2020
24	- major performance improvement by simplifying code in _FP_gets
25	to not use fscanf. This might slow things down on platforms
26	with very slow fgetc.
27
28	1.61 Sun Feb 9 18:38:29 CET 2020
29	- lint uulib: fix some format string type mismatches
30	and some other minor issues.
31
32	1.6 Thu Oct 24 17:11:54 CEST 2019
33	- fix heap overflow (testcase by Noel Duffy, reported
34	by Robert Scheck). The defense-in-depth mechanism based
35	on mmap should make this unexploitable for other than denial
36	of service, on systems supporting mmap/mprotect.
37
38	1.5 Sat Jul 11 03:56:06 CEST 2015
39	- fix a heap overflow (testcase by Krzysztof Wojtaś).
40	- on systems that support it (posix + mmap + map_anonymous),
41	allocate all dynamic areas via mmap and put four guard
42	pages around them, to catch similar heap overflows
43	safely in the future.
44	- find a safer way to pass in CC/CFLAGS to uulib.
45	- added stability canary support.
46
47	1.4 Sun May 29 17:17:01 CEST 2011
48	- avoid a classical buffer overflow in case a progress
49	message is too long.
50	- this release adds dependencies for snprintf/vsnprintf.
51	- some uuencode encoders do not generate a final "space" line
52	before the "end" marker, so do not rely on the line to be there.
53
54	1.34 Tue Dec 14 22:20:00 CET 2010
55	- fix a one-byte-past-end-write buffer overflow in UURepairData
56	(reported, analysed and testcase provided by Marco Walther).
57	- quoted-printable decoding was completely broken, try a fix.
58
59	1.33 Wed Oct 28 09:04:38 CET 2009
60	- handle yEnc files with part end=0 and total= more gracefully.
61	I wish yEnc had been created by somebody who knows;
62	what he does;
63	but I doubt he even knows;
64	what he did.
65
66	1.32 Wed Sep 16 20:07:13 CEST 2009
67	- Due to a glitch with CVS, configure lacked executable bits.
68	(Quickly reported by Anton Berezin).
69
70	1.31 Wed Sep 16 09:04:30 CEST 2009
71	- do not use system-replacements for case-insensitive string
72	functions when found, as they are broken on too many systems
73	(mostly bsds, as usual, but at least some versions of GNU/Linux
74	disagree with themselves apparently). Analyzed by Anton Berezin.
75
76	1.3 Sat Aug 29 01:24:35 CEST 2009
77	- major changes, new bugs and changes in decoding behaviour are
78	expected (but not intended).
79	- major scanning and decoding speed-up (by a factor of 4),
80	by replacing ultra-slow _FP_gets and improving IsKnownHeader
81	(but fgets is still responsible for >50% if the time).
82	- new option OPT_AUTOCHECK to disable O(n) UUCheckGlobalList
83	call after every loadfile, majorly speeds up large decodes
84	(easily by a factor of 10..100).
85	- allow "Smerge -1" to call UUCheckGlobalList.
86	- majorly speed up part insertion (still O(n), but much faster).
87	- allow for 1023 octet headers instead of the standard
88	255 octet ones.
89	- support strcasestr, strcasecmp, strncasecmp for added speed.
90
91	1.12 Mon Oct 13 14:11:01 CEST 2008
92	- use the yencode filesize as additional matching criterium
93	to avoid false matches.
94	- made the example decoder more verbose w.r.t. error handling.
95	- removed potentially confusing decode_temp calls from
96	example decoder.
97
98	1.11 Fri Jun 13 15:32:30 CEST 2008
99	- don't ask.
100
101	1.10 Fri Jun 13 14:22:42 CEST 2008
102	- fix an infinite-looping problem when scanning in freestyle
103	mode (testcase provided by Pieter Geens and Reinhard Pfau).
104
105	1.09 Fri May 25 19:38:11 CEST 2007
106	- create something sensible, trust a windows program to fuck
107	it up: work around literal "(null)" filenames in yenc-encoded
108	files.
109	- some minor cleanups.
110
111	1.08 Sat Dec 16 23:27:13 CET 2006
112	- URGENT update, the last release did not
113	decode files correctly, usually not at all.
114	- my last patch was, of course, completely bogus.
115	(sorry. looked simple...).
116
117	1.07 Sun Dec 10 17:41:46 CET 2006
118	- fixed an uninitialised variable based on analysis
119	and patch by Mark Martinec.
120
121	1.06 Tue Dec 6 00:56:05 CET 2005
122	- fix a number of int/long format errors in the encoding part and
123	fix some signed/unsigned char problems of unknown relevance,
124	reported by Jonas Smedegaard.
125	- new EXPERIMENTAL options OPT_RBUF and OPT_WBUF to set default
126	stdio buffer size for reading and writing files.
127
128	1.051 Thu Mar 3 18:00:52 CET 2005
129	- change of contact address.
130	- updated perl parts to GPLv2.
131
132	1.05 Fri Feb 25 22:50:27 CET 2005
133	- fix a (likely exploitable) segfault problem, (tracked down
134	and/or reported by Mark Martinec and Robert Lewis).
135
136	1.04 Tue Dec 28 15:08:44 CET 2004
137	- slightly improved subject filename extraction.
138	Also see the filename callback in the example-decoder.
139
140	1.03 Sun Apr 18 22:05:43 CEST 2004
141	- upgrade to uudeview-0.5.20, which supposedly fixes a few buffer
142	overflows. However, judging from the patch these vulnerabilities
143	were not present in the Convert-UUlib version (I might err, though,
144	documentation on the actual exploits is scarce).
145	As every uudeview update usually brings more instability than stability
146	I advise against using this version until it has proven itself
147	to be stable, or 1.02 is proven to contain the same buffer overflows.
148
149	1.02 Sun Apr 18 16:47:26 CEST 2004
150	- renamed crc32 to uulib_crc32, to work around yet another
151	shortcoming in this oh-so-outdated macosx.
152
153	1.01 Sun Feb 1 19:49:51 CET 2004
154	- make it compile with 5.005_03 (reported by Anton Berezin).
155	- very short files might not be detected because the header
156	parsing code might skip them.
157
158	1.0 Thu Nov 6 14:32:08 CET 2003
159	- change bracket policy to give priority to (x/y) over (x),
160	and use the last bracket found otherwise.
161	- part numbers at the end of the subject are now recognized.
162	- updated to uulib-0.5.19. Differences and bugfixes kept.
163
164	0.31 Wed Oct 16 01:22:34 CEST 2002
165	- no internal code changes.
166	- much better documentation, now considered "useful".
167	- removed the procedural interface.
168	- fought the wish to perl-5.8'ify and thus simplify the code :().
169	- stress-tested version 0.3 against 70000 data postings since sunday.
170
171	0.3 Sun Oct 13 15:12:11 CEST 2002
172	- updated to uulib 0.5.18. As expected, some but not all of my bugfixes
173	have went into uulib, so the number of differences decreased a bit
174	again.
175	- I found out that the library is being sold commercially by Frank
176	Pilhofer, disregarding the GPL and ignoring the rights of the people
177	who sent in patches :(
178	- vastly more useful documentation in the .pm file.
179	- much smaller distribution filesize ;)
180
181	0.213 Sat Jul 27 21:16:30 CEST 2002
182	- fixed another buffer overflow, also added a santity check to fgets.
183
184	0.212 Sat Apr 6 03:52:13 CEST 2002
185	- fix yEnc decoding support.
186	- new option OPT_DOTDOT, that makes uulib unescape dot-escaping.
187	- increased linelength to 1195.
188
189	0.211 Fri Apr 5 23:56:46 CEST 2002
190	- sigh. new version of uulib, new braindamaged buffer overflows
191	fixed. Diffs like "line length 256 => 300" should have
192	alerted me...
193
194	0.21 Sun Mar 31 22:06:05 CEST 2002
195	- bumped uulib from 0.5.15 to 0.5.17 (adds some yEnc support, YENC_ENCODED).
196	- source-renamed FP_-symbols to _FP_ again, but still define them
197	to be FP_* in the object file.
198	- new callback: SetFileNameCallback (actually documented ;)
199
200	0.201 Sun Sep 16 03:43:38 CEST 2001
201	- fixed another segfault-bug in uulib, thanks to Lars Hecking who
202	provides all the test files ;)
203
204	0.2 Thu Jun 14 18:42:49 CEST 2001
205	- Frank Pilhofer is NOT dead! He is alive, kicking, and fixing
206	bugs in uulib now! Since his uulib and mine diverged quite
207	a bit I am still in the process of merging his bugfixes
208	into my version. So be aware that this might introduce new
209	instabilities...
210	- merged uulib-0.5.15
211	- optimize decode_file to not copy the file contents when a rename
212	succeeds (TMPDIR same disk as destination).
213	- updated documentation.
214
215	0.111 Fri May 4 22:29:09 CEST 2001
216	- heuristic to decode microsoft-rfc822-headers (microsoft uses
217	'\' as path seperator which is also the rfc822 quote character.
218	of course they could have quoted it, but it's microsoft, so
219	only the devil knows how they try to parse mime (they obviously
220	haven't read the standard AGAIN). in case you wonder, this fixes
221	the "c:my_documentssend.doc" "filename" problem.
222
223	0.11 Sun Jul 16 22:42:57 CEST 2000
224	- fixed a bug in the file callback.
225
226	0.10 Tue May 2 03:31:09 CEST 2000
227	- fixed one very longstanding bug that might have been the cause
228	for the many mysterious segmentation faults. Hopefully.
229	- improved documentation to the point that it slowly becomes useful
230	as a (very quick) reference.
231
232	0.07 Wed Nov 24 18:45:23 CET 1999
233	- removed END { CleanUp } from UUlib.pm, perl is too
234	buggy to rely on this in the face of popen etc..
235
236	0.06 Thu Jul 29 22:48:18 CEST 1999
237	- Thierry Bezecourt had the very reasonable idea to include
238	the example source in the manpage.
239
240	0.05 Mon May 24 11:37:25 CEST 1999
241	- LoadFile returns number of parts loaded.
242
243	0.04 Mon May 10 22:02:31 CEST 1999
244	- fixed a couple of portability problems.
245	- UUEncodeToStream had a wrong definition.
246	- added primitive testsuite.
247	- added README.
248
249	0.03 Sat May 8 22:40:01 CEST 1999
250	- renamed it to Convert::UUlib.
251
252	0.02 Fri May 7 01:26:19 CEST 1999
253	- function names exportable (use :all-tag).
254	- made uulist-related functions methods.
255	- the first fix from cpan-tester. sigh you people save the
256	world, continuously.
257
258	0.01 Thu May 6 14:30:44 1999
259	- original version; created by h2xs 1.19
260