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Commit Graph

187 Commits

Author SHA1 Message Date
Jay Berkenbilt
2d2f619665 Implement Pl_RunLength pipeline 2017-08-19 14:50:55 -04:00
Jay Berkenbilt
cfa2eb97fb Add page rotation (fixes #132) 2017-08-12 22:57:38 -04:00
Jay Berkenbilt
30f109e244 Read xref table without PCRE
Also accept more errors than before.
2017-08-10 21:30:32 -04:00
Jay Berkenbilt
ca5b1d267a Improve stream length recovery
Eliminate PCRE and find endobj not preceded by endstream. Be more lax
about placement of endstream and endobj.
2017-08-10 21:30:32 -04:00
Jay Berkenbilt
03aa9679ac Find starxref without PCRE 2017-08-10 21:30:32 -04:00
Jay Berkenbilt
1765c6ec20 Find header without PCRE 2017-08-10 21:30:32 -04:00
Jay Berkenbilt
296b679d6e Implement findFirst and findLast in InputSource
Preparing to refactor some pattern searching code to use these instead
of their own memchr loops. This should simplify the code that replaces
PCRE.
2017-08-10 21:30:32 -04:00
Jay Berkenbilt
ef8ae5449d Allow QPDFTokenizer::readToken to return bad tokens
Sometimes we want to ignore bad tokens rather than having them throw
an exception. A coverage case is commented out here and added in a
later commit.
2017-08-10 19:01:41 -04:00
Jay Berkenbilt
c5dc6d8067 Remove unused PointerHolder interface
Also fix a bug resulting from incorrect use of PointerHolder because
of this unused parameter.
2017-08-10 19:01:38 -04:00
Jay Berkenbilt
8fe261d8b4 QUtil::strcasecmp 2017-08-05 10:22:33 -04:00
Jay Berkenbilt
2d5b854468 Allow reading command-line args from files (fixes #16) 2017-07-29 22:23:21 -04:00
Jay Berkenbilt
5993c3e83c Detect input file = output file (fixes #29) 2017-07-29 20:58:01 -04:00
Jay Berkenbilt
f37d399d82 Add newline-before-endstream option (fixes #103) 2017-07-29 12:21:38 -04:00
Jay Berkenbilt
b389268f16 Better handle split content streams (fixes #73)
When parsing content streams, allow content to be split arbitrarily
across stream boundaries.
2017-07-29 12:19:04 -04:00
Jay Berkenbilt
4647acbe3c Clarify documentation on copyForeignObject (fixes #69)
Be explicit about the need to keep the source QPDF object around.
2017-07-29 12:19:04 -04:00
Jay Berkenbilt
3a1ff5ded9 Add option to preserve unreferenced objects 2017-07-28 19:19:11 -04:00
Jay Berkenbilt
7f8892525f Add precheck streams capability
When requested, QPDFWriter will do more aggress prechecking of streams
to make sure it can actually succeed in decoding them before
attempting to do so. This will allow preservation of raw data even
when the raw data is corrupted relative to the specified filters.
2017-07-27 23:42:27 -04:00
Jay Berkenbilt
a4fd4b91c6 Convert stream filtering errors to warnings 2017-07-27 18:43:07 -04:00
Jay Berkenbilt
40f00122b8 Convert object parsing errors to warnings
QPDFObjectHandle::parseInternal now issues warnings instead of
throwing exceptions for all error conditions that it finds (except
internal logic errors) and has stronger recovery for things like
invalid tokens and malformed dictionaries. This should improve qpdf's
ability to recover from a wide range of broken files that currently
cause it to fail.
2017-07-27 18:20:31 -04:00
Jay Berkenbilt
dd8dad74f4 Move lexer helper functions to QUtil 2017-07-27 13:59:56 -04:00
Jay Berkenbilt
701b518d5c Detect recursion loops resolving objects (fixes #51)
During parsing of an object, sometimes parts of the object have to be
resolved. An example is stream lengths. If such an object directly or
indirectly points to the object being parsed, it can cause an infinite
loop. Guard against all cases of re-entrant resolution of objects.
2017-07-26 06:24:07 -04:00
Jay Berkenbilt
315092dd98 Avoid xref reconstruction infinite loop (fixes #100)
This is CVE-2017-9209.
2017-07-26 06:24:07 -04:00
Jay Berkenbilt
bd6c845619 Fix typo in comment 2017-07-26 06:24:07 -04:00
Thorsten Schöning
7c08aa4280 Include QPDFExc.hh for use in std::list 2016-01-24 12:07:03 -05:00
Thorsten Schöning
e0201c12cc Include QPDFObjectHandle for use in std::list
QPDFObjectHandle was used as forward declaration, but C++-Builder 10
Seattle can't use it in std::list in such cases because the type is
undefined.
2016-01-24 12:04:25 -05:00
Jay Berkenbilt
e0e9d64674 Remove some ABI compatibility private methods
Since we have to bump soname, remove some private methods that were
just there for binary compatibility
2015-11-10 12:22:40 -05:00
Jay Berkenbilt
0496ab1a6e Fix spelling errors 2015-10-31 18:56:43 -04:00
Jay Berkenbilt
b8bdef0ad1 Implement deterministic ID
For non-encrypted files, determinstic ID generation uses file contents
instead of timestamp and file name. At a small runtime cost, this
enables generation of the same /ID if the same inputs are converted in
the same way multiple times.
2015-10-31 18:56:42 -04:00
Jay Berkenbilt
f77acbdbba Copyright 2015 2015-05-24 17:26:49 -04:00
Jay Berkenbilt
857bb208d3 include time.h in QUtil.hh
QUtil.hh needs time.h to get time_t on some platforms. Thanks Peter
Korsgaard <peter@korsgaard.com>
2015-05-24 16:26:05 -04:00
Jay Berkenbilt
a11549a566 Detect loops in /Pages structure
Pushing inherited objects to pages and getting all pages were both
prone to stack overflow infinite loops if there were loops in the
Pages dictionary. There is a general weakness in the code in that any
part of the code that traverses the Pages structure would be prone to
this and would have to implement its own loop detection. A more robust
fix may provide some general method for handling the Pages structure,
but it's probably not worth doing.

Note: addition of *Internal2 private functions was done rather than
changing signatures of existing methods to avoid breaking
compatibility.
2015-02-21 19:47:11 -05:00
Jay Berkenbilt
225b018290 Update Copyright to 2014 2014-01-14 15:40:02 -05:00
Jay Berkenbilt
235d8f28f8 Increase random data provider support
Add a method to get the current random data provider, and document and
test the method for resetting it.
2013-12-16 16:21:28 -05:00
Jay Berkenbilt
5e3bad2f86 Refactor random data generation
Add new RandomDataProvider object and implement existing random number
generation in terms of that.  This enables end users to supply their
own random data providers.
2013-12-14 15:17:35 -05:00
Jay Berkenbilt
f010e07c0c Add missing #include of <string> 2013-10-28 20:59:58 -04:00
Jay Berkenbilt
4229457068 Security: use a secure random number generator
If not available, give an error.  The user may also configure qpdf to
use an insecure random number generator.
2013-10-18 10:45:12 -04:00
Jay Berkenbilt
cee2592ed1 Change API/ABI and withdraw 4.2.0
4.2.0 was binary incompatible in spite of there being no deletions or
changes to any public methods.  As such, we have to bump the ABI and
are fixing some API breakage while we're at it.

Previous 4.3.0 target is now 5.1.0.
2013-07-10 11:30:13 -04:00
Jay Berkenbilt
a3576a7359 Bug fix: handle generation > 0 when generating object streams
Rework QPDFWriter to always track old object IDs and QPDFObjGen
instead of int, thus not discarding the generation number.  Switch to
QPDF::getCompressibleObjGen() to properly handle the case of an old
object eligible for compression that has a generation of other than
zero.
2013-06-14 14:58:09 -04:00
Jay Berkenbilt
96eb965115 Use QPDFObjectHandle::getObjGen() where appropriate
In internal code and examples, replace calls to getObjectID() and
getGeneration() with calls to getObjGen() where possible.
2013-06-14 14:58:09 -04:00
Jay Berkenbilt
5039da0b91 Add QPDFObjectHandle::getObjGen()
This is safer than getObjectID() and getGeneration() for many uses.
2013-06-14 14:58:09 -04:00
Jay Berkenbilt
d88231e01e Promote QPDF::ObjGen to top-level object QPDFObjGen 2013-06-14 14:58:08 -04:00
Jay Berkenbilt
3803e9cc4a Export terminateParsing in the DLL
Windows fix: QPDFObject::ParserCallbacks::terminateParsing() was not
declared with QPDF_DLL.
2013-03-11 12:37:32 -04:00
Jay Berkenbilt
9d4f52c014 Clarify documentation on encrypted files
Explicitly state how QPDF handles empty passwords when writing files.
Apparently some libraries treat the empty string as the owner password
as an instruction to generate a random password.
2013-03-11 12:37:32 -04:00
Jay Berkenbilt
29f5830325 Fix getTypeCode and getTypeName work for indirect objects
Remove const qualifier from getTypeCode and get getTypeName methods of
QPDFObjectHandle, make them work properly for indirect objects, and
exercise them much better in the test suite.
2013-03-05 13:35:46 -05:00
Jay Berkenbilt
119f2a4b68 Add method to terminate content stream parsing 2013-03-05 13:35:46 -05:00
Jay Berkenbilt
ac4deac187 Call QUtil::safe_fopen in place of fopen
fopen was previuosly called wrapped by QUtil::fopen_wrapper, but
QUtil::safe_fopen does this itself, which is less cumbersome.
2013-03-05 13:35:46 -05:00
Jay Berkenbilt
a51ae10b8d Remove all calls to sprintf 2013-03-05 13:35:46 -05:00
Jay Berkenbilt
30027481f7 Remove all old-style casts from C++ code 2013-03-04 16:45:16 -05:00
Jay Berkenbilt
32b62035ce Replace many calls to sprintf with QUtil::hex_encode
Add QUtil::hex_encode to encode binary data has a hexadecimal string,
and use it in place of sprintf where possible.
2013-03-04 16:45:15 -05:00
Jay Berkenbilt
bfda717749 Cosmetic changes to be closer to Adobe terminology
Change object type Keyword to Operator, and place the order of the
object types in object_type_e in the same order as they are mentioned
in the PDF specification.

Note that this change only breaks backward compatibility with code
that has not yet been released.
2013-01-23 09:38:05 -05:00