zlib 1.1.4

ChangeLog

@@ -1,6 +1,16 @@
 
 		ChangeLog file for zlib
 
+Changes in 1.1.4 (11 March 2002)
+- ZFREE was repeated on same allocation on some error conditions.
+  This creates a security problem described in
+  http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+  less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+  of 256 bytes. (A complete fix will be available in 1.1.5).
+
 Changes in 1.1.3 (9 July 1998)
 - fix "an inflate input buffer bug that shows up on rare but persistent
   occasions" (Mark)

FAQ

@@ -3,70 +3,98 @@
 
 
 If your question is not there, please check the zlib home page 
-http://www.cdrom.com/pub/infozip/zlib/ which may have more recent information.
+http://www.zlib.org which may have more recent information.
+The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
 
 
-1) I need a Windows DLL
-2) I need a Visual Basic interface to zlib
-3) compress() returns Z_BUF_ERROR
-4) deflate or inflate returns Z_BUF_ERROR
-5) Where is the zlib documentation (man pages, etc...)?
-6) Why don't you use GNU autoconf, libtool, etc...?
-7) There is a bug in zlib.
-8) I get "undefined reference to gzputc"
+ 1. Is zlib Y2K-compliant?
 
+    Yes. zlib doesn't handle dates.
 
+ 2. Where can I get a Windows DLL version?
 
-1) I need a Windows DLL
+    The zlib sources can be compiled without change to produce a DLL. If you
+    want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions
+    about the zlib DLL should be sent to Gilles Vollant ([email protected]).
 
-  The zlib sources can be compiled without change to produce a DLL.
-  If you want a precompiled DLL, see http://www.winimage.com/zLibDll
+ 3. Where can I get a Visual Basic interface to zlib?
 
+    See
+        * http://www.winimage.com/zLibDll/cmp-z-it.zip
+        * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
+        * contrib/visual-basic.txt in the zlib distribution
 
-2) I need a Visual Basic interface to zlib
+ 4. compress() returns Z_BUF_ERROR
 
-  See http://www.tcfb.com/dowseware/cmp-z-it.zip
-      http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
-  and contrib/visual-basic.txt
+    Make sure that before the call of compress, the length of the compressed
+    buffer is equal to the total size of the compressed buffer and not
+    zero. For Visual Basic, check that this parameter is passed by reference
+    ("as any"), not by value ("as long").
 
-3) compress() returns Z_BUF_ERROR
+ 5. deflate() or inflate() returns Z_BUF_ERROR
 
-  Make sure that before the call of compress, the length of the
-  compressed buffer is equal to the total size of the compressed buffer
-  and not zero.  For Visual Basic, check that this parameter is passed
-  by reference ("as any"), not by value ("as long").
+    Before making the call, make sure that avail_in and avail_out are not
+    zero. When setting the parameter flush equal to Z_FINISH, also make sure
+    that avail_out is big enough to allow processing all pending input.
 
+ 6. Where's the zlib documentation (man pages, etc.)?
 
-4) deflate or inflate returns Z_BUF_ERROR
+    It's in zlib.h for the moment, and Francis S. Lin has converted it to a
+    web page zlib.html. Volunteers to transform this to Unix-style man pages,
+    please contact Jean-loup Gailly ([email protected]). Examples of zlib usage
+    are in the files example.c and minigzip.c.
 
-  Make sure that before the call avail_in and avail_out are not zero.
+ 7. Why don't you use GNU autoconf or libtool or ...?
 
+    Because we would like to keep zlib as a very small and simple
+    package. zlib is rather portable and doesn't need much configuration.
 
-5) Where is the zlib documentation (man pages, etc...)?
+ 8. I found a bug in zlib.
 
-  It's in zlib.h for the moment. Volunteers to transform this
-  to man pages, please contact [email protected]. Examples of zlib usage
-  are in the files example.c and minigzip.c.
+    Most of the time, such problems are due to an incorrect usage of
+    zlib. Please try to reproduce the problem with a small program and send
+    the corresponding source to us at [email protected] . Do not send
+    multi-megabyte data files without prior agreement.
 
+ 9. Why do I get "undefined reference to gzputc"?
 
-6) Why don't you use GNU autoconf, libtool, etc...?
+    If "make test" produces something like
 
-  Because we would like to keep zlib as a very small and simple package.
-  zlib is rather portable and doesn't need much configuration.
+       example.o(.text+0x154): undefined reference to `gzputc'
+
+    check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
+    /usr/X11R6/lib. Remove any old versions, then do "make install".
 
+10. I need a Delphi interface to zlib.
 
-7) There is a bug in zlib.
+    See the directories contrib/delphi and contrib/delphi2 in the zlib
+    distribution.
 
-  Most of the time, such problems are due to an incorrect usage
-  of zlib. Please try to reproduce the problem with a small
-  program and send us the corresponding source at [email protected]
-  Do not send multi-megabyte data files without prior agreement.
+11. Can zlib handle .zip archives?
 
+    See the directory contrib/minizip in the zlib distribution.
 
-8) I get "undefined reference to gzputc"
+12. Can zlib handle .Z files?
 
-  If "make test" produces something like
-     example.o(.text+0x174): 
-  check that you don't have old files libz.* in /usr/lib, /usr/local/lib
-  or /usr/X11R6/lib. Remove old versions then do "make install".
+    No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt
+    the code of uncompress on your own.
 
+13. How can I make a Unix shared library?
+
+    make clean
+    ./configure -s
+    make
+
+14. Why does "make test" fail on Mac OS X?
+
+    Mac OS X already includes zlib as a shared library, and so -lz links the
+    shared library instead of the one that the "make" compiled. For zlib
+    1.1.3, the two are incompatible due to different compile-time
+    options. Simply change the -lz in the Makefile to libz.a, and it will use
+    the compiled library instead of the shared one and the "make test" will
+    succeed.
+
+15. I have a question about OttoPDF
+
+    We are not the authors of OttoPDF. The real author is on the OttoPDF web
+    site Joel Hainley [email protected].

Makefile

@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-1998 Jean-loup Gailly.
+# Copyright (C) 1995-2002 Jean-loup Gailly.
 # For conditions of distribution and use, see copyright notice in zlib.h 
 
 # To compile and test, type:
@@ -24,7 +24,7 @@ LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 CPP=$(CC) -E
 
-VER=1.1.3
+VER=1.1.4
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -47,7 +47,8 @@ OBJA =
 TEST_OBJS = example.o minigzip.o
 
 DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
-  algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+  algorithm.txt zlib.3 zlib.html \
+  msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
   nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
   contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
   contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \

Makefile.in

@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-1998 Jean-loup Gailly.
+# Copyright (C) 1995-2002 Jean-loup Gailly.
 # For conditions of distribution and use, see copyright notice in zlib.h 
 
 # To compile and test, type:
@@ -24,7 +24,7 @@ LDFLAGS=-L. -lz
 LDSHARED=$(CC)
 CPP=$(CC) -E
 
-VER=1.1.3
+VER=1.1.4
 LIBS=libz.a
 SHAREDLIB=libz.so
 
@@ -47,7 +47,8 @@ OBJA =
 TEST_OBJS = example.o minigzip.o
 
 DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
-  algorithm.txt zlib.3 msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+  algorithm.txt zlib.3 zlib.html \
+  msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
   nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
   contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
   contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \

README

@@ -1,7 +1,7 @@
-zlib 1.1.3 is a general purpose data compression library.  All the code
+zlib 1.1.4 is a general purpose data compression library.  All the code
 is thread safe.  The data format used by the zlib library
 is described by RFCs (Request for Comments) 1950 to 1952 in the files 
-ftp://ds.internic.net/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
+http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
 format) and rfc1952.txt (gzip format). These documents are also available in
 other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
 
@@ -14,51 +14,50 @@ except example.c and minigzip.c.
 
 To compile all files and run the test program, follow the instructions
 given at the top of Makefile. In short "make test; make install"
-should work for most machines. For Unix: "configure; make test; make install"
+should work for most machines. For Unix: "./configure; make test; make install"
 For MSDOS, use one of the special makefiles such as Makefile.msc.
 For VMS, use Make_vms.com or descrip.mms.
 
-Questions about zlib should be sent to <zlib@quest.jpl.nasa.gov>, or to
+Questions about zlib should be sent to <zlib@gzip.org>, or to
 Gilles Vollant <[email protected]> for the Windows DLL version.
-The zlib home page is http://www.cdrom.com/pub/infozip/zlib/
-The official zlib ftp site is ftp://ftp.cdrom.com/pub/infozip/zlib/
-Before reporting a problem, please check those sites to verify that
+The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/
+Before reporting a problem, please check this site to verify that
 you have the latest version of zlib; otherwise get the latest version and
 check whether the problem still exists or not.
 
-Mark Nelson <[email protected]> wrote an article about zlib for the Jan. 1997
+PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html
+before asking for help.
+
+Mark Nelson <[email protected]> wrote an article about zlib for the Jan. 1997
 issue of  Dr. Dobb's Journal; a copy of the article is available in
-http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
-
-The changes made in version 1.1.3 are documented in the file ChangeLog.
-The main changes since 1.1.2 are:
-
-- fix "an inflate input buffer bug that shows up on rare but persistent
-  occasions" (Mark)
-- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
-- fix gzseek(..., SEEK_SET) in write mode
-- fix crc check after a gzeek (Frank Faubert)
-- fix miniunzip when the last entry in a zip file is itself a zip file
-  (J Lillge)
-- add contrib/asm586 and contrib/asm686 (Brian Raiter)
-  See http://www.muppetlabs.com/~breadbox/software/assembly.html
-- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
-- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
-- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
-- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
-- added a FAQ file
-
-plus many changes for portability.
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
+
+The changes made in version 1.1.4 are documented in the file ChangeLog.
+The only changes made since 1.1.3 are bug corrections:
+
+- ZFREE was repeated on same allocation on some error conditions.
+  This creates a security problem described in
+  http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+  less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+  of 256 bytes. (A complete fix will be available in 1.1.5).
+
+The beta version 1.1.5beta includes many more changes. A new official
+version 1.1.5 will be released as soon as extensive testing has been
+completed on it.
+
 
 Unsupported third party contributions are provided in directory "contrib".
 
-A Java implementation of zlib is available in the Java Development Kit 1.1
+A Java implementation of zlib is available in the Java Development Kit
 http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
-See the zlib home page http://www.cdrom.com/pub/infozip/zlib/ for details.
+See the zlib home page http://www.zlib.org for details.
 
 A Perl interface to zlib written by Paul Marquess <[email protected]>
-is in the CPAN (Comprehensive Perl Archive Network) sites, such as:
-ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
+is in the CPAN (Comprehensive Perl Archive Network) sites
+http://www.cpan.org/modules/by-module/Compress/
 
 A Python interface to zlib written by A.M. Kuchling <[email protected]>
 is available in Python 1.5 and later versions, see
@@ -117,7 +116,7 @@ Acknowledgments:
 
 Copyright notice:
 
- (C) 1995-1998 Jean-loup Gailly and Mark Adler
+ (C) 1995-2002 Jean-loup Gailly and Mark Adler
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

adler32.c

@@ -1,5 +1,5 @@
 /* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 

compress.c

@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 

crc32.c

@@ -1,5 +1,5 @@
 /* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 

deflate.c

@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.1.3 Copyright 1995-1998 Jean-loup Gailly ";
+   " deflate 1.1.4 Copyright 1995-2002 Jean-loup Gailly ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -242,7 +242,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
         windowBits = -windowBits;
     }
     if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
-        windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+        windowBits < 9 || windowBits > 15 || level < 0 || level > 9 ||
 	strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
         return Z_STREAM_ERROR;
     }

deflate.h

@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-1998 Jean-loup Gailly
+ * Copyright (C) 1995-2002 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 

example.c

@@ -1,5 +1,5 @@
 /* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 

gzio.c

@@ -1,5 +1,5 @@
 /* gzio.c -- IO on .gz files
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Compile this file with -DNO_DEFLATE to avoid the compression code.