[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 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.

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:	1.71
Committed:	Fri Feb 28 17:19:02 2020 UTC (4 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.70:	+1 -0 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 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
21	1.62 Mon Feb 17 23:19:42 CET 2020
22	- major performance improvement by simplifying code in _FP_gets
23	to not use fscanf. This might slow things down on platforms
24	with very slow fgetc.
25
26	1.61 Sun Feb 9 18:38:29 CET 2020
27	- lint uulib: fix some format string type mismatches
28	and some other minor issues.
29
30	1.6 Thu Oct 24 17:11:54 CEST 2019
31	- fix heap overflow (testcase by Noel Duffy, reported
32	by Robert Scheck). The defense-in-depth mechanism based
33	on mmap should make this unexploitable for other than denial
34	of service, on systems supporting mmap/mprotect.
35
36	1.5 Sat Jul 11 03:56:06 CEST 2015
37	- fix a heap overflow (testcase by Krzysztof Wojtaś).
38	- on systems that support it (posix + mmap + map_anonymous),
39	allocate all dynamic areas via mmap and put four guard
40	pages around them, to catch similar heap overflows
41	safely in the future.
42	- find a safer way to pass in CC/CFLAGS to uulib.
43	- added stability canary support.
44
45	1.4 Sun May 29 17:17:01 CEST 2011
46	- avoid a classical buffer overflow in case a progress
47	message is too long.
48	- this release adds dependencies for snprintf/vsnprintf.
49	- some uuencode encoders do not generate a final "space" line
50	before the "end" marker, so do not rely on the line to be there.
51
52	1.34 Tue Dec 14 22:20:00 CET 2010
53	- fix a one-byte-past-end-write buffer overflow in UURepairData
54	(reported, analysed and testcase provided by Marco Walther).
55	- quoted-printable decoding was completely broken, try a fix.
56
57	1.33 Wed Oct 28 09:04:38 CET 2009
58	- handle yEnc files with part end=0 and total= more gracefully.
59	I wish yEnc had been created by somebody who knows;
60	what he does;
61	but I doubt he even knows;
62	what he did.
63
64	1.32 Wed Sep 16 20:07:13 CEST 2009
65	- Due to a glitch with CVS, configure lacked executable bits.
66	(Quickly reported by Anton Berezin).
67
68	1.31 Wed Sep 16 09:04:30 CEST 2009
69	- do not use system-replacements for case-insensitive string
70	functions when found, as they are broken on too many systems
71	(mostly bsds, as usual, but at least some versions of GNU/Linux
72	disagree with themselves apparently). Analyzed by Anton Berezin.
73
74	1.3 Sat Aug 29 01:24:35 CEST 2009
75	- major changes, new bugs and changes in decoding behaviour are
76	expected (but not intended).
77	- major scanning and decoding speed-up (by a factor of 4),
78	by replacing ultra-slow _FP_gets and improving IsKnownHeader
79	(but fgets is still responsible for >50% if the time).
80	- new option OPT_AUTOCHECK to disable O(n) UUCheckGlobalList
81	call after every loadfile, majorly speeds up large decodes
82	(easily by a factor of 10..100).
83	- allow "Smerge -1" to call UUCheckGlobalList.
84	- majorly speed up part insertion (still O(n), but much faster).
85	- allow for 1023 octet headers instead of the standard
86	255 octet ones.
87	- support strcasestr, strcasecmp, strncasecmp for added speed.
88
89	1.12 Mon Oct 13 14:11:01 CEST 2008
90	- use the yencode filesize as additional matching criterium
91	to avoid false matches.
92	- made the example decoder more verbose w.r.t. error handling.
93	- removed potentially confusing decode_temp calls from
94	example decoder.
95
96	1.11 Fri Jun 13 15:32:30 CEST 2008
97	- don't ask.
98
99	1.10 Fri Jun 13 14:22:42 CEST 2008
100	- fix an infinite-looping problem when scanning in freestyle
101	mode (testcase provided by Pieter Geens and Reinhard Pfau).
102
103	1.09 Fri May 25 19:38:11 CEST 2007
104	- create something sensible, trust a windows program to fuck
105	it up: work around literal "(null)" filenames in yenc-encoded
106	files.
107	- some minor cleanups.
108
109	1.08 Sat Dec 16 23:27:13 CET 2006
110	- URGENT update, the last release did not
111	decode files correctly, usually not at all.
112	- my last patch was, of course, completely bogus.
113	(sorry. looked simple...).
114
115	1.07 Sun Dec 10 17:41:46 CET 2006
116	- fixed an uninitialised variable based on analysis
117	and patch by Mark Martinec.
118
119	1.06 Tue Dec 6 00:56:05 CET 2005
120	- fix a number of int/long format errors in the encoding part and
121	fix some signed/unsigned char problems of unknown relevance,
122	reported by Jonas Smedegaard.
123	- new EXPERIMENTAL options OPT_RBUF and OPT_WBUF to set default
124	stdio buffer size for reading and writing files.
125
126	1.051 Thu Mar 3 18:00:52 CET 2005
127	- change of contact address.
128	- updated perl parts to GPLv2.
129
130	1.05 Fri Feb 25 22:50:27 CET 2005
131	- fix a (likely exploitable) segfault problem, (tracked down
132	and/or reported by Mark Martinec and Robert Lewis).
133
134	1.04 Tue Dec 28 15:08:44 CET 2004
135	- slightly improved subject filename extraction.
136	Also see the filename callback in the example-decoder.
137
138	1.03 Sun Apr 18 22:05:43 CEST 2004
139	- upgrade to uudeview-0.5.20, which supposedly fixes a few buffer
140	overflows. However, judging from the patch these vulnerabilities
141	were not present in the Convert-UUlib version (I might err, though,
142	documentation on the actual exploits is scarce).
143	As every uudeview update usually brings more instability than stability
144	I advise against using this version until it has proven itself
145	to be stable, or 1.02 is proven to contain the same buffer overflows.
146
147	1.02 Sun Apr 18 16:47:26 CEST 2004
148	- renamed crc32 to uulib_crc32, to work around yet another
149	shortcoming in this oh-so-outdated macosx.
150
151	1.01 Sun Feb 1 19:49:51 CET 2004
152	- make it compile with 5.005_03 (reported by Anton Berezin).
153	- very short files might not be detected because the header
154	parsing code might skip them.
155
156	1.0 Thu Nov 6 14:32:08 CET 2003
157	- change bracket policy to give priority to (x/y) over (x),
158	and use the last bracket found otherwise.
159	- part numbers at the end of the subject are now recognized.
160	- updated to uulib-0.5.19. Differences and bugfixes kept.
161
162	0.31 Wed Oct 16 01:22:34 CEST 2002
163	- no internal code changes.
164	- much better documentation, now considered "useful".
165	- removed the procedural interface.
166	- fought the wish to perl-5.8'ify and thus simplify the code :().
167	- stress-tested version 0.3 against 70000 data postings since sunday.
168
169	0.3 Sun Oct 13 15:12:11 CEST 2002
170	- updated to uulib 0.5.18. As expected, some but not all of my bugfixes
171	have went into uulib, so the number of differences decreased a bit
172	again.
173	- I found out that the library is being sold commercially by Frank
174	Pilhofer, disregarding the GPL and ignoring the rights of the people
175	who sent in patches :(
176	- vastly more useful documentation in the .pm file.
177	- much smaller distribution filesize ;)
178
179	0.213 Sat Jul 27 21:16:30 CEST 2002
180	- fixed another buffer overflow, also added a santity check to fgets.
181
182	0.212 Sat Apr 6 03:52:13 CEST 2002
183	- fix yEnc decoding support.
184	- new option OPT_DOTDOT, that makes uulib unescape dot-escaping.
185	- increased linelength to 1195.
186
187	0.211 Fri Apr 5 23:56:46 CEST 2002
188	- sigh. new version of uulib, new braindamaged buffer overflows
189	fixed. Diffs like "line length 256 => 300" should have
190	alerted me...
191
192	0.21 Sun Mar 31 22:06:05 CEST 2002
193	- bumped uulib from 0.5.15 to 0.5.17 (adds some yEnc support, YENC_ENCODED).
194	- source-renamed FP_-symbols to _FP_ again, but still define them
195	to be FP_* in the object file.
196	- new callback: SetFileNameCallback (actually documented ;)
197
198	0.201 Sun Sep 16 03:43:38 CEST 2001
199	- fixed another segfault-bug in uulib, thanks to Lars Hecking who
200	provides all the test files ;)
201
202	0.2 Thu Jun 14 18:42:49 CEST 2001
203	- Frank Pilhofer is NOT dead! He is alive, kicking, and fixing
204	bugs in uulib now! Since his uulib and mine diverged quite
205	a bit I am still in the process of merging his bugfixes
206	into my version. So be aware that this might introduce new
207	instabilities...
208	- merged uulib-0.5.15
209	- optimize decode_file to not copy the file contents when a rename
210	succeeds (TMPDIR same disk as destination).
211	- updated documentation.
212
213	0.111 Fri May 4 22:29:09 CEST 2001
214	- heuristic to decode microsoft-rfc822-headers (microsoft uses
215	'\' as path seperator which is also the rfc822 quote character.
216	of course they could have quoted it, but it's microsoft, so
217	only the devil knows how they try to parse mime (they obviously
218	haven't read the standard AGAIN). in case you wonder, this fixes
219	the "c:my_documentssend.doc" "filename" problem.
220
221	0.11 Sun Jul 16 22:42:57 CEST 2000
222	- fixed a bug in the file callback.
223
224	0.10 Tue May 2 03:31:09 CEST 2000
225	- fixed one very longstanding bug that might have been the cause
226	for the many mysterious segmentation faults. Hopefully.
227	- improved documentation to the point that it slowly becomes useful
228	as a (very quick) reference.
229
230	0.07 Wed Nov 24 18:45:23 CET 1999
231	- removed END { CleanUp } from UUlib.pm, perl is too
232	buggy to rely on this in the face of popen etc..
233
234	0.06 Thu Jul 29 22:48:18 CEST 1999
235	- Thierry Bezecourt had the very reasonable idea to include
236	the example source in the manpage.
237
238	0.05 Mon May 24 11:37:25 CEST 1999
239	- LoadFile returns number of parts loaded.
240
241	0.04 Mon May 10 22:02:31 CEST 1999
242	- fixed a couple of portability problems.
243	- UUEncodeToStream had a wrong definition.
244	- added primitive testsuite.
245	- added README.
246
247	0.03 Sat May 8 22:40:01 CEST 1999
248	- renamed it to Convert::UUlib.
249
250	0.02 Fri May 7 01:26:19 CEST 1999
251	- function names exportable (use :all-tag).
252	- made uulist-related functions methods.
253	- the first fix from cpan-tester. sigh you people save the
254	world, continuously.
255
256	0.01 Thu May 6 14:30:44 1999
257	- original version; created by h2xs 1.19
258