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2019-01-03Switch annotation flattening to use the form xobjectsJay Berkenbilt
Instead of directly putting the contents of the annotation appearance streams into the page's content stream, add commands to render the form xobjects directly. This is a more robust way to do it than the original solution as it works properly with patterns and avoids problems with resource name clashes between the pages and the form xobjects.
2019-01-01Add QPDFObjectHandle::mergeDictionary()Jay Berkenbilt
2019-01-01Add Matrix class under QPDFObjectHandleJay Berkenbilt
2018-12-22Add QPDFObjectHandle::getJSON()Jay Berkenbilt
2018-12-18Add QPDFObjectHandle::wrapInArray()Jay Berkenbilt
Wrap an object in an array if it is not already an array.
2018-06-22Treat content stream parsing errors as an error, not a warningJay Berkenbilt
If parsing content streams is treated as a warning, there is no way for a caller to know if a parsing operation has failed. This is very dangerous and will likely result in data loss when token filters are parser callbacks are in use.
2018-06-22Fix QPDFObjectHandle::shallowCopyJay Berkenbilt
It's not really a shallow copy. It just doesn't cross indirect object boundaries. The old implementation had a bug that would cause multiple shallow copies of the same object to share memory, which was not the intention.
2018-06-21Better support for creating Unicode stringsJay Berkenbilt
2018-06-21Add QPDFObjectHandle::Rectangle typeJay Berkenbilt
Provide a convenient way of accessing rectangles.
2018-04-15Limit depth of nesting in direct objects (fixes #202)Jay Berkenbilt
This fixes CVE-2018-9918.
2018-03-06Properly handle pages with no contents (fixes #194)Jay Berkenbilt
Remove calls to assertPageObject(). All cases in the library that called assertPageObject() work fine if you don't call assertPageObject() because nothing assumes anything that was being checked by that call. Removing the calls enables more files to be successfully processed.
2018-02-19More robust handling of type errorsJay Berkenbilt
Give objects descriptions and context so it is possible to issue warnings instead of fatal errors for attempts to access objects of the wrong type.
2018-02-19Push members of QPDFObjectHandle into a Members objectJay Berkenbilt
As in other cases, this is to enable adding new member variables in the future without breaking ABI compatibility.
2018-02-19Simplify TokenFilter interfaceJay Berkenbilt
Expose Pl_QPDFTokenizer, and have it do more of the work of managing the token filter's pipeline.
2018-02-19Add additional interface for filtering page contentsJay Berkenbilt
2018-02-19Implement TokenFilter and refactor Pl_QPDFTokenizerJay Berkenbilt
Implement a TokenFilter class and refactor Pl_QPDFTokenizer to use a TokenFilter class called ContentNormalizer. Pl_QPDFTokenizer is now a general filter that passes data through a TokenFilter.
2018-02-19Add coalesce contents capabilityJay Berkenbilt
2018-02-19Refactor parseContentStreamJay Berkenbilt
2018-02-19Remove redundant methodJay Berkenbilt
Remove a redundant method that was equal to another one with additional arguments. This breaks binary compatibility, but there are other ABI breaking changes in the upcoming release, so now is the time to do it.
2018-02-19Use inline image token in content parserJay Berkenbilt
2017-09-12Improve message for stream decoding errorJay Berkenbilt
Tweak the message so that we inform the user that we are mitigating data loss.
2017-08-27Fix error caught by clangJay Berkenbilt
2017-08-26Parse iteratively to avoid stack overflow (fixes #146)Jay Berkenbilt
2017-08-22Spell checkJay Berkenbilt
2017-08-21Enable finer grained control of stream decodingJay Berkenbilt
This commit adds several API methods that enable control over which types of filters QPDF will attempt to decode. It also adds support for /RunLengthDecode and /DCTDecode filters for both encoding and decoding.
2017-08-13Add page rotation (fixes #132)Jay Berkenbilt
2017-07-29Better handle split content streams (fixes #73)Jay Berkenbilt
When parsing content streams, allow content to be split arbitrarily across stream boundaries.
2017-07-28Add precheck streams capabilityJay Berkenbilt
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.
2017-07-28Convert object parsing errors to warningsJay Berkenbilt
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.
2017-07-26Don't interpret word tokens in content streams (fixes #82)Jay Berkenbilt
2017-07-26Handle object ID 0 (fixes #99)Jay Berkenbilt
This is CVE-2017-9208. The QPDF library uses object ID 0 internally as a sentinel to represent a direct object, but prior to this fix, was not blocking handling of 0 0 obj or 0 0 R as a special case. Creating an object in the file with 0 0 obj could cause various infinite loops. The PDF spec doesn't allow for object 0. Having qpdf handle object 0 might be a better fix, but changing all the places in the code that assumes objid == 0 means direct would be risky.
2017-07-26Fix infinite loop while reporting an error (fixes #101)Jay Berkenbilt
This is CVE-2017-9210. The description string for an error message included unparsing an object, which is too complex of a thing to try to do while throwing an exception. There was only one example of this in the entire codebase, so it is not a pervasive problem. Fixing this eliminated one class of infinite loop errors.
2015-02-21Avoid resolving arguments to RJay Berkenbilt
When checking two objects preceding R while parsing, ensure that the objects are direct. This avoids stuff like 1 0 obj containing 1 0 R 0 R from causing an infinite loop in object resolution.
2014-11-14Handle pages with no /Contents from getPageContents()Jay Berkenbilt
The spec allows /Contents to be omitted for pages that are blank, but QPDFObjectHandle::getPageContents() was throwing an exception in this case.
2013-10-18Security: replace operator[] with atJay Berkenbilt
For std::string and std::vector, replace operator[] with at. This was done using an automated process. See README.hardening for details.
2013-07-07Fix errors reported by CoverityJay Berkenbilt
Thanks to Jiri Popelka from Red Hat for sending the output of a Coverity run over qpdf.
2013-06-14Add QPDFObjectHandle::getObjGen()Jay Berkenbilt
This is safer than getObjectID() and getGeneration() for many uses.
2013-04-04Add explicit int to double castJay Berkenbilt
2013-03-05Fix getTypeCode and getTypeName work for indirect objectsJay Berkenbilt
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.
2013-03-05Add method to terminate content stream parsingJay Berkenbilt
2013-03-04Remove all old-style casts from C++ codeJay Berkenbilt
2013-01-25Improve qpdf --checkJay Berkenbilt
Fix exit status for case of errors without warnings, continue after errors when possible, add test case for parsing a file with content stream errors on some but not all pages.
2013-01-23Cosmetic changes to be closer to Adobe terminologyJay Berkenbilt
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.
2013-01-22Add getTypeCode() and getTypeName()Jay Berkenbilt
Add virtual methods to QPDFObject, wrappers to QPDFObjectHandle, and implementations to all the QPDF_Object types.
2013-01-20Add QPDFObjectHandle::parseContentStream methodJay Berkenbilt
This method allows parsing of the PDF objects in a content stream or array of content streams.
2013-01-20Added new QPDFObjectHandle types Keyword and InlineImageJay Berkenbilt
These object types are to facilitate content stream parsing.
2012-07-25added QPDFObjectHandle::replaceStreamData(std::string data).Tobias Hoffmann
2012-07-21Implement QPDFObjectHandle::parseJay Berkenbilt
Move object parsing code from QPDF to QPDFObjectHandle and parameterize the parts of it that are specific to a QPDF object. Provide a version that can't handle indirect objects and that can be called on an arbitrary string. A side effect of this change is that the offset used when reporting invalid stream length has changed, but since the new value seems like a better value than the old one, the test suite has been updated rather than making the code backward compatible. This only effects the offset reported for invalid streams that lack /Length or have an invalid /Length key. Updated some test code and exmaples to use QPDFObjectHandle::parse. Supporting changes include adding a BufferInputSource constructor that takes a string.
2012-07-15qpdf: push inherited attributes to page when showing imagesJay Berkenbilt
from qpdf command-line tool
2012-07-11Support copying objects from another QPDF objectJay Berkenbilt
This includes QPDF::copyForeignObject and supporting foreign objects as arguments to addPage*.