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2013-10-18 Jay Berkenbilt <ejb@ql.org> * 5.0.1: release * Warn when -accessibility=n is specified with a modern encryption format (R > 3). Also, accept this flag (and ignore with warning) with 256-bit encryption. qpdf has always ignored the accessibility setting with R > 3, but it previously did so silently. 2013-10-05 Jay Berkenbilt <ejb@ql.org> * Replace operator[] in std::string and std::vector with "at" in order to get bounds checking. This reduces the chances that incorrect code will result in data exposure or buffer overruns. See README.hardening for additional notes. * Use cryptographically secure random number generation when available. See additional notes in README. * Replace some assert() calls with std::logic_error exceptions. Ideally there shouldn't be assert() calls outside of testing. This change may make a few more potential code errors in handling invalid data recoverable. * Security fix: In places where std::vector<T>(size_t) was used, either validate that the size parameter is sane or refactor code to avoid the need to pre-allocate the vector. This reduces the likelihood of allocating a lot of memory in response to invalid data in linearization hint streams. * Security fix: sanitize /W array in cross reference stream to avoid a potential integer overflow in a multiplication. It is unlikely that any exploits were possible from this bug as additional checks were also performed. * Security fix: avoid buffer overrun that could be caused by bogus data in linearization hint streams. The incorrect code could only be triggered when checking linearization data, which must be invoked explicitly. qpdf does not check linearization data when reading or writing linearized files, but the qpdf --check command does check linearization data. * Security fix: properly handle empty strings in QPDF_Name::normalizeName. The empty string is not a valid name and would never be parsed as a name, so there were no known conditions where this method could be called with an empty string. * Security fix: perform additional argument sanity checks when reading bit streams. * Security fix: in QUtil::toUTF8, change bounds checking to avoid having a pointer point temporarily outside the bounds of an array. Some compiler optimizations could have made the original code unsafe. 2013-07-10 Jay Berkenbilt <ejb@ql.org> * 5.0.0: release * 4.2.0 turned out to be binary incompatible on some platforms even though there were no changes to the public API. Therefore the 4.2.0 release has been withdrawn, and is being replaced with a 5.0.0 release that acknowledges the ABI change and also removes some problematic methods from the public API. * Remove methods from public API that were only intended to be used by QPDFWriter and really didn't make sense to call from anywhere else as they required internal knowledge that only QPDFWriter had: - QPDF::getLinearizedParts - QPDF::generateHintStream - QPDF::getObjectStreamData - QPDF::getCompressibleObjGens - QPDF::getCompressibleObjects 2013-07-07 Jay Berkenbilt <ejb@ql.org> * 4.2.0: release [withdrawn] * Ignore error case of a stream's decode parameters having invalid length when there are no stream filters. * qpdf: add --show-npages command-line option, which causes the number of pages in the input file to be printed on a line by itself. * qpdf: allow omission of range in --pages. If range is omitted such that an argument that is supposed to be a range is an invalid range and a valid file name, the range of 1-z is assumed. This makes it possible to merge a bunch of files with something like qpdf --empty out.pdf --pages *.pdf -- 2013-06-15 Jay Berkenbilt <ejb@ql.org> * Handle some additional broken files with missing /ID in trailer for encrypted files and with space rather than newline after xref. 2013-06-14 Jay Berkenbilt <ejb@ql.org> * Detect and correct /Outlines dictionary being a direct object when linearizing files. This is not allowed by the spec but has been seen in the wild. Prior to this change, such a file would cause an internal error in the linearization code, which assumed /Outlines was indirect. * Add /Length key to crypt filter dictionary for encrypted files. This key is optional, but some version of MacOS reportedly fail to open encrypted PDF files without this key. * Bug fix: properly handle object stream generation when the original file has some compressible objects with generation != 0. * Add QPDF::getCompressibleObjGens() and deprecate QPDF::getCompressibleObjects(), which had a flaw in its logic. * Add new QPDFObjectHandle::getObjGen() method and indiciate in comments that its use is favored over getObjectID() and getGeneration() for most cases. * Add new QPDFObjGen object to represent an object ID/generation pair. 2013-04-14 Jay Berkenbilt <ejb@ql.org> * 4.1.0: release 2013-03-25 Jay Berkenbilt <ejb@ql.org> * manual/qpdf-manual.xml: Document the casting policy that is followed in qpdf's implementation. 2013-03-11 Jay Berkenbilt <ejb@ql.org> * When creating Windows binary distributions, make sure to only copy DLLs of the correct type. The ensures that the 32-bit distributions contain 32-bit DLLs and the 64-bit distributions contain 64-bit DLLs. 2013-03-07 Jay Berkenbilt <ejb@ql.org> * Use ./install-sh (already present) instead of "install -c" to install executables to fix portability problems against different UNIX variants. 2013-03-03 Jay Berkenbilt <ejb@ql.org> * Add protected terminateParsing method to QPDFObjectHandle::ParserCallbacks that implementor can call to terminate parsing of a content stream. 2013-02-28 Jay Berkenbilt <ejb@ql.org> * Favor fopen_s and strerror_s on MSVC to avoid CRT security warnings. This is useful for people who may want to use qpdf in an application that is Windows 8 certified. * New method QUtil::safe_fopen to wrap calls to fopen. This is less cumbersome than calling QUtil::fopen_wrapper. * Remove all calls to sprintf * New method QUtil::int_to_string_base to convert to octal or hexademical (or decimal) strings without using sprintf 2013-02-26 Jay Berkenbilt <ejb@ql.org> * Rewrite QUtil::int_to_string and QUtil::double_to_string to remove internal length limits but to remain backward compatible with the old versions for valid inputs. 2013-02-23 Jay Berkenbilt <ejb@ql.org> * Bug fix: properly handle overridden compressed objects. When caching objects from an object stream, only cache objects that, based on the xref table, would actually be resolved into this stream. Prior to this fix, if an object stream A contained an object B that was overridden by an appended section of the file, qpdf would cache the old value of B if any non-overridden member of A was accessed before B. This commit fixes that bug. 2013-01-31 Jay Berkenbilt <ejb@ql.org> * Do not remove libtool's .la file during the make install step. Note to packagers: if your distribution wants to you remove the .la file, you will have to do that yourself now. 2013-01-25 Jay Berkenbilt <ejb@ql.org> * New method QUtil::hex_encode to encode binary data as a hexadecimal string * qpdf --check was exiting with status 0 in some rare cases even when errors were found. It now always exits with one of the document error codes (0 for success, 2 for errors, 3 or warnings). 2013-01-24 Jay Berkenbilt <ejb@ql.org> * Make --enable-werror work for MSVC, and generally handle warning options better for that compiler. Warning flags for that compiler were previous hard-coded into the build with /WX enabled unconditionally. * Split warning flags into WFLAGS in autoconf.mk to make them easier to override. Before they were repeated in CFLAGS and CXXFLAGS and were commingled with other compiler flags. * qpdf --check now does syntactic checks all pages' content streams as well as checking overall document structure. Semantic errors are still not checked, and there are no plans to add semantic checks. 2013-01-22 Jay Berkenbilt <ejb@ql.org> * Add QPDFObjectHandle::getTypeCode(). This method returns a unique integer (enumerated type) value corresponding to the object type of the QPDFObjectHandle. It can be used as an alternative to the QPDFObjectHandle::is* methods for type testing, particularly where there is a desire to use a switch statement or optimize for performance when testing object types. * Add QPDFObjectHandle::getTypeName(). This method returns a string literal describing the object type. It is useful for testing and debugging. 2013-01-20 Jay Berkenbilt <ejb@ql.org> * Add QPDFObjectHandle::parseContentStream, which parses the objects in a content stream and calls handlers in a callback class. The example pdf-parse-content illustrates it use. * Add QPDF_Operator and QPDF_InlineImage types along with appropriate wrapper methods in QPDFObjectHandle. These new object types are to facilitate content stream parsing. 2013-01-17 Jay Berkenbilt <ejb@ql.org> * 4.0.1: release * Add clarifying comment in QPDF.hh for methods that return the user password to state that it is no longer possible with newer encryption formats to recover the user password knowing the owner password. * Fix detection of binary attachments in the test suite. This resolves false test failures on some platforms. No changes to the actual QPDF code were made. 2012-12-31 Jay Berkenbilt <ejb@ql.org> * 4.0.0: release * Add new methods qpdf_get_pdf_extension_level, qpdf_set_r5_encryption_parameters, qpdf_set_r6_encryption_parameters, qpdf_set_minimum_pdf_version_and_extension, and qpdf_force_pdf_version_and_extension to support new functionality from the C API. 2012-12-30 Jay Berkenbilt <ejb@ql.org> * Fix long-standing bug that could theoretically have resulted in possible misinterpretation of decode parameters in streams. As far as I can tell, it is extremely unlikely that files with the characteristics that would have triggered the bug actually exist in cases that qpdf versions prior to 4.0.0 could have read. Unencrypted files with encrypted attachments would have triggered this bug, but qpdf versions prior to 4.0.0 already refused to open such files. * Fix long-standing bug in which a stream that used a crypt filter and was otherwise not filterable by qpdf would be decrypted properly but would retain the crypt filter indication in the file. There are no known ways to create files like this, so it is unlikely that anyone ever hit this bug. 2012-12-29 Jay Berkenbilt <ejb@ql.org> * Add read/write support for both the deprecated Acrobat IX encryption format and the Acrobat X/PDF 2.0 encryption format using 256-bit AES keys. Using the Acrobat IX format (R=5) forces the version of the file to 1.7 with extension level 3. Using the PDF 2.0 format (R=6) forces it to 1.7 extension level 8. * Add new method QPDF::getEncryptionKey to return the actual encryption key used for encryption of data in the file. The key is returned as a std::string. * Non-compatible API change: change signature of QPDF::compute_data_key to take the R and V values from the encryption dictionary. There is no reason for any application code to call this method since handling of encryption is done automatically by the qpdf libary. It is used internally by QPDFWriter. * Support reading and decryption of files whose main text is not encrypted but whose attachments are. More generally, support the case of files and streams encrypted differently with some limitations, described in the documentation. This was not previously supported due to lack of test files, but I created test files using a trial version of Acrobat XI to fully implement this case. * Incorporate sha2 code from sphlib 3.0. See README for licensing. Create private pipeline class for computing hashes with sha256, sha384, and sha512. * Allow specification of initialization vector when using AES filtering. This is required to compute the hash used in /R=6 (PDF 2.0) encryption. 2012-12-28 Jay Berkenbilt <ejb@ql.org> * Add random number generation functions to QUtil. * Fix old bug that could cause an infinite loop if user password recovery methods were called and a password contained the "(" character (which happens to be the first byte of padding used by older PDF encryption formats). This bug was noticed while reading code and would not happen under ordinary usage patterns even if the password contained that character. 2012-12-27 Jay Berkenbilt <ejb@ql.org> * Add awareness of extension level to PDF Version methods for both reading and writing. This includes adding method QPDF::getExtensionLevel and new versions of QPDFWriter::setMinimumPDFVersion and QPDFWriter::forcePDFVersion that support extension levels. The qpdf command-line tool interprets version numbers of the form x.y.z as version x.y at extension level z. * Update AES classes to support use of 256-bit keys. * Non-compatible API change: Removed public method QPDF::flattenScalarReferences. Instead, just flatten the scalar references we actually need to flatten. Flattening scalar references was a wrong decision years ago and has occasionally caused other problems, among which were that it caused qpdf to visit otherwise unreferenced and possibly erroneous objects in the file when it didn't have to. There's no reason that any non-internal code would have had to call this. * Non-compatible API change: Removed public method QPDF::decodeStreams which was previously used by qpdf --check but is no longer used. The decodeStreams method could generate false positives since it would attempt to access all objects in the file including those that were not referenced. There's no reason that any non-internal code would have had to call this. * Non-compatible API change: Removed public method QPDF::trimTrailerForWrite, which was only intended for use by QPDFWriter and which is no longer used. 2012-12-26 Jay Berkenbilt <ejb@ql.org> * Add new fields to QPDF::EncryptionData to support newer encryption formats (V=5, R=5 and R=6) * Non-compatible API change: Change public nested class QPDF::EncryptionData to make all member fields private and to add method calls. This is a non-compatible API change, but changing EncryptionData is necessary to support newer encryption formats, and making this change will prevent the need from making a non-compatible change in the future if new fields are added. A public nested class should never have had public members to begin with. 2012-12-25 Jay Berkenbilt <ejb@ql.org> * Allow PDF header to appear anywhere in the first 1024 bytes of the file as recommended in the implementation notes of the Adobe version of the PDF spec. 2012-11-20 Jay Berkenbilt <ejb@ql.org> * Add zlib and libpcre to Requires.private in the pkg-config file to support static linking. Thanks Tobias Hoffmann for pointing out the omission. * Ignore (with warning) non-freed objects in the xref table whose offset is 0. Some PDF producers (incorrectly) do this. See https://bugs.linuxfoundation.org/show_bug.cgi?id=1081. 2012-09-23 Jay Berkenbilt <ejb@ql.org> * Add public methods QPDF::processInputSource and QPDFWriter::setOutputPipeline to allow users to read from custom input sources and to write to custom pipelines. This allows the maximum flexibility in sources for reading and writing PDF files. 2012-09-06 Jay Berkenbilt <ejb@ql.org> * 3.0.2: release * Add new method QPDFWriter::setExtraHeaderText to add extra text, such as application-specific comments, to near the beginning of a PDF file. For linearized files, this appears after the linearization parameter dictionary. For non-linearized files, it appears right after the PDF header and non-ASCII comment. * Make it possible to write the same QPDF object with two different QPDFWriter objects that have both called setLinearization(true) by making private method QPDF::calculateLinearizationData() properly initialize its state. * Bug fix: Writing after calling QPDFWriter::setOutputMemory() would cause a segmentation fault because of an internal field not being initialized, rendering that method useless. This has been corrected. 2012-08-11 Jay Berkenbilt <ejb@ql.org> * 3.0.1: release * Bug fix: let EOF terminate a literal token as well as whitespace or comments. 2012-07-31 Jay Berkenbilt <ejb@ql.org> * 3.0.0: release 2012-07-29 Jay Berkenbilt <ejb@ql.org> * 3.0.rc1: release 2012-07-25 Jay Berkenbilt <ejb@ql.org> * From Tobias: add QPDFObjectHandle::replaceStreamData that takes a std::string analogous to the QPDFObjectHandle::newStream that takes a string that was added earlier. 2012-07-21 Jay Berkenbilt <ejb@ql.org> * Change configure to have image comparison tests disabled by default. Update README and README.maintainer with information about running them. * Add --pages command-line option to qpdf to enable page-based merging and splitting. * Add new method QPDFObjectHandle::replaceDict to replace a stream's dictionary. Use with caution; see comments in QPDFObjectHandle.hh. * Add new method QPDFObjectHandle::parse for creation of QPDFObjectHandle objects from string representations of the objects. Thanks to Tobias Hoffmann for the idea. 2012-07-15 Jay Berkenbilt <ejb@ql.org> * add new QPDF::isEncrypted method that returns some additional information beyond other versions. * libqpdf/QPDFWriter.cc: fix copyEncryptionParameters to fix the minimum PDF version based on other file's encryption needs. This is a fix to code added on 2012-07-14 and did not impact previously released code. * libqpdf/QPDFWriter.cc (copyEncryptionParameters): Bug fix: qpdf was not preserving whether or not AES encryption was being used when copying encryption parameters. The file would still have been properly encrypted, but a file that started off encrypted with AES could have become encrypted with RC4. 2012-07-14 Jay Berkenbilt <ejb@ql.org> * QPDFWriter: add public copyEncryptionParameters to allow copying encryption parameters from another file. * QPDFWriter: detect if the user has inserted an indirect object from another QPDF object and throw an exception directing the user to copyForeignObject. 2012-07-11 Jay Berkenbilt <ejb@ql.org> * Added new APIs to copy objects from one QPDF to another. This includes letting QPDF::addPage() (and QPDF::addPageAt()) accept a page object from another QPDF and adding QPDF::copyForeignObject(). See QPDF.hh for details. * Add method QPDFObjectHandle::getOwningQPDF() to return the QPDF object associated with an indirect QPDFObjectHandle. * Add convenience methods to QPDFObjectHandle: assertIndirect(), isPageObject(), isPagesObject() * Cache when QPDF::pushInheritedAttributesToPage() has been called to avoid traversing the pages trees multiple times. This state is cleared by QPDF::updateAllPagesCache() and ignored by QPDF::flattenPagesTree(). 2012-07-08 Jay Berkenbilt <ejb@ql.org> * Add QPDFObjectHandle::newReserved to create a reserved object and QPDF::replaceReserved to replace it with a real object. QPDFObjectHandle::newReserved reserves an object ID in a QPDF object and ensures that any references to it remain unresolved. When QPDF::replaceReserved is later called, previous references to the reserved object will properly resolve to the replaced object. 2012-07-07 Jay Berkenbilt <ejb@ql.org> * NOTE: BREAKING API CHANGE. Remove previously required length parameter from the version QPDFObjectHandle::replaceStreamData that uses a stream data provider. Prior to qpdf 3.0.0, you had to compute the stream length in advance so that qpdf could internally verify that the stream data had the same length every time the provider was invoked. Now this requirement is enforced a different way, and the length parameter is no longer required. Note that I take API-breaking changes very seriously and only did it in this case since the lack of need to know length in advance could significantly simplify people's code. If you were previously going to a lot of trouble to compute the length of the new stream data in advance, you now no longer have to do that. You can just drop the length parameter and remove any code that was previously computing the length. Thanks to Tobias Hoffmann for pointing out how annoying the original interface was. 2012-07-05 Jay Berkenbilt <ejb@ql.org> * Add QPDFWriter methods to write to an already open stdio FILE*. Implementation and idea area based on contributions from Tobias Hoffmann. 2012-07-04 Jay Berkenbilt <ejb@ql.org> * Accept changes from Tobias Hoffmann: add public method QPDF::pushInheritedAttributesToPage including warnings for non-inherited keys that may be discarded from /Pages by non-conformant PDF files when the /Pages tree is flattened. 2012-06-27 Jay Berkenbilt <ejb@ql.org> * Add Pl_Concatenate pipeline for stream concatenation also implemented by Tobias Hoffmann. Also added test code (libtests/concatenate.cc). * Add new methods implemented by Tobias Hoffmann: QPDFObjectHandle::newReal(double) and QPDFObjectHandle::newStream(QPDF*, std::string const&). 2012-06-26 Jay Berkenbilt <ejb@ql.org> * Minor changes so that support for PDF files larger than 4GB works well with 32-bit and 64-bit Linux and also with 32-bit and 64-bit Windows with both MSVC and mingw. * Rework internal methods for doing recovery of the cross reference tables for much greater efficiency both in terms of time and memory usage. 2012-06-24 Jay Berkenbilt <ejb@ql.org> * Support PDF files larger than 4 GB. This involved many changes to the ABI to increase the size of integer types used in various places as well as increasing the amount of padding used when creating linearized files. Automated tests for large files are disabled by default. Run ./configure --help for information on enabling them. Running the tests requires 11 GB of free disk space and takes several minutes. 2012-06-22 Jay Berkenbilt <ejb@ql.org> * examples/pdf-create.cc: Provide an example of creating a PDF from scratch. This simple PDF has a single page with some text and an image. * Add empty QPDFObjectHandle factories for array and dictionary. With PDF-from-scratch capability, it is useful to be able to create empty arrays and dictionaries and add keys to them. Updated pdf_from_scratch.cc to use these interfaces. 2012-06-21 Jay Berkenbilt <ejb@ql.org> * Add QPDF::emptyPDF() to create an empty QPDF object suitable for adding pages and other objects to. pdf_from_scratch.cc is test code that exercises it. * make/libtool.mk: Place user-specified CPPFLAGS and LDFLAGS later in the compilation so that if a user installs things in a non-standard place that they have to tell the build about, earlier versions of qpdf installed there won't break the build. Thanks to Macports for reporting this. (Fixes bug 3468860.) * Instead of using off_t in the public APIs, use qpdf_offset_t instead. This is defined as long long in qpdf/Types.h. If your system doesn't support long long, you can redefine it. * Add pkg-config files * QPDFObjectHandle: add shallowCopy() method * QPDF: add new APIs for adding and removing pages. This includes addPage(), addPageAt(), and removePage(). Also a method updateAllPagesCache() is now available to force update of the internal pages cache if you should modify the pages structure manually. * QPDF: new processFile method that takes an open FILE* instead of a filename. 2012-06-20 Jay Berkenbilt <ejb@ql.org> * Add new array mutation routines to QPDFObjectHandle. Implemented by Tobias Hoffmann. * Rework APIs that use size_t, off_t, and primative integer types so that size_t is used for sizes of memory and off_t is used for file offsets. Also set _FILE_OFFSET_BITS so that large files can be supported on 32-bit UNIX/Linux platforms. The code assumes in places that sizeof(off_t) >= sizeof(size_t). This resulted in non-compatible ABI changes and hopefully clears the way for QPDF to work with files that are larger than 4 GiB in size. * Add support for versioned symbols on ELF platforms. * Various fixes for gcc 4.7 2011-04-06 Jay Berkenbilt <ejb@ql.org> * Fix PCRE to stop using deprecated (and now dropped) interfaces. 2011-12-28 Jay Berkenbilt <ejb@ql.org> * 2.3.1: release * include <stdint.h> if available to support MSVC 2010 * Since PCRE is not necessarily thread safe, don't declare any PCRE objects to be static. * Disregard stderr output from ghostscript when using it to compare images in the test suite; see comments in qpdf.test for details. * Fixed a few documentation errors. 2011-08-11 Jay Berkenbilt <ejb@ql.org> * 2.3.0: release * include/qpdf/qpdf-c.h ("C"): add new methods qpdf_init_write_memory, qpdf_get_buffer_length, and qpdf_get_buffer to support writing to memory from the C API. * include/qpdf/qpdf-c.h ("C"): add new methods qpdf_get_info_key and qpdf_set_info_key for manipulating text fields of the /Info dictionary. 2011-08-10 Jay Berkenbilt <ejb@ql.org> * libqpdf/QPDFWriter.cc (copyEncryptionParameters): preserve whether metadata is encryption. This fixes part of bug 3173659: the password becomes invalid if qpdf copies an encrypted file with cleartext-metadata. * include/qpdf/QPDFWriter.hh: add a new constructor that takes only a QPDF reference and leaves specification of output for later. Add methods setOutputFilename() to set the output to a filename or stdout, and setOutputMemory() to indicate that output should go to a memory buffer. Add method getBuffer() to retrieve the buffer used if output was saved to a memory buffer. * include/qpdf/QPDF.hh: add methods replaceObject() and swapObjects() to allow replacement of an object and swapping of two objects by object ID. * include/qpdf/QPDFObjectHandle.hh: add new methods getDictAsMap() and getArrayAsVector() for returning the elements of a dictionary or an array as a map or vector. 2011-06-25 Jay Berkenbilt <ejb@ql.org> * 2.2.4: release 2011-06-23 Jay Berkenbilt <ejb@ql.org> * make/libtool.mk (install): Do not strip executables and shared libraries during installation. Leave that up to the packager. * configure.ac: disable -Werror by default. 2011-05-07 Jay Berkenbilt <ejb@ql.org> * libqpdf/QPDF_linearization.cc (isLinearized): remove unused offset variable, found by a gcc 4.6 warning. 2011-04-30 Jay Berkenbilt <ejb@ql.org> * 2.2.3: release * libqpdf/QPDF.cc (readObjectInternal): Accept the case of the stream keyword being followed by carriage return by itself. While this is not permitted by the specification, there are PDF files that do this, and other readers can read them. * libqpdf/Pl_QPDFTokenizer.cc (processChar): When an inline image is detected, suspend normalization only up to the end of the inline image rather than for the remainder of the content stream. (Fixes qpdf-Bugs 3152169.) 2011-01-31 Jay Berkenbilt <ejb@ql.org> * libqpdf/QPDF.cc (readObjectAtOffset): use -1 rather than 0 when reading an object at a given to indicate that no object number is expected. This allows xref recovery to proceed even if a file uses the invalid object number 0 as a regular object. * libqpdf/QPDF_linearization.cc (isLinearized): use -1 rather than 0 as a sentintel for not having found the first object in the file. Since -1 can never match the regular expression, this prevents an infinite loop when checking a file that starts with (erroneous) 0 0 obj. (Fixes qpdf-Bugs-3159950.) 2010-10-04 Jay Berkenbilt <ejb@ql.org> * 2.2.2: release * include/qpdf/qpdf-c.h: Add qpdf_read_memory to C API to call QPDF::processMemoryFile. 2010-10-01 Jay Berkenbilt <ejb@ql.org> * 2.2.1: release * include/qpdf/QPDF.hh: Add setOutputStreams method to allow redirection of library-generated output/error to alternative streams. * include/qpdf/QPDF.hh: Add processMemoryFile method for processing a PDF file from a memory buffer instead of a file. 2010-09-24 Jay Berkenbilt <ejb@ql.org> * libqpdf/QPDF.cc: change private "file" method to be a PointerHolder<InputSource> to prepare qpdf for being able to work with PDF files loaded into memory in addition to working with files on disk. * include/qpdf/PointerHolder.hh: add operator* and operator-> methods so that PointerHolder objects can be used like pointers. This is consistent with the smart pointer objects in the next revision of C++. 2010-09-05 Jay Berkenbilt <ejb@ql.org> * libqpdf/QPDF.cc (readObjectInternal): Recognize empty objects and treat them as null. * libqpdf/QPDF_Stream.cc (filterable): Handle inline image filter abbreviations as stream filter abbreviations. Although this is not technically allowed by the PDF specification, table H.1 in the pre-ISO spec indicates that Adobe's readers accept them. Thanks to Jian Ma <stronghorse@tom.com> for bringing this to my attention. 2010-08-14 Jay Berkenbilt <ejb@ql.org> * 2.2.0: release * Rename README.windows to README-windows.txt and convert its line endings to Windows-style line endings. Also mention Jian Ma's VC6 port in the manual and README-windows.txt. 2010-08-09 Jay Berkenbilt <ejb@ql.org> * Add QPDFObjectHandle::getRawStreamData to return raw (unfiltered) stream data. 2010-08-08 Jay Berkenbilt <ejb@ql.org> * 2.2.rc1: release 2010-08-05 Jay Berkenbilt <ejb@ql.org> * Add QPDFObjectHandle::addPageContents, a convenience routine for appending or prepending new streams to a page's content streams. The "pdf-double-page-size" example illustrates its use. * Add new methods to QPDFObjectHandle: replaceStreamData and newStream. These methods allow users of the qpdf library to add new streams and to replace data of existing streams. The "pdf-double-page-size" and "pdf-invert-images" examples illustrate their use. 2010-06-06 Jay Berkenbilt <ejb@ql.org> * Fix memory leak for QPDF objects whose underlying PDF objects contain circular references. Thanks to Jian Ma <stronghorse@tom.com> for calling my attention to the memory leak. 2010-04-25 Jay Berkenbilt <ejb@ql.org> * 2.1.5: release * libqpdf/QPDF_encryption.cc (compute_encryption_key): remove restrictions on length of file identifier string. (Fixes qpdf-Bugs-2991412.) 2010-04-18 Jay Berkenbilt <ejb@ql.org> * 2.1.4: release * libqpdf/QPDFWriter.cc (writeLinearized): the padding calculation fix in 2.1.2 was applied in only one place but it was needed in two places since there are actually two cross reference streams in a linearized file. The new padding calculation is now used for both streams. Hopefully this should put an end to linearization padding problems. (Fixes qpdf-Bugs-2979219.) 2010-04-10 Jay Berkenbilt <ejb@ql.org> * qpdf/qpdf.cc (main): Since qpdf --check only checks syntax and stream encoding without doing any semantic checks, make the output clearer when no errors around found. This is inspired by qpdf-Bugs-2983225. 2010-03-27 Jay Berkenbilt <ejb@ql.org> * 2.1.3: release * libqpdf/QPDF_optimization.cc (flattenScalarReferences): Flatten scalar references for unreferenced objects as well as those seen during traversal of the file. This matters when preserving object streams that contain unreferenced objects with indirect scalars. (Fixes qpdf-Bugs-2974522.) Updated TODO with a description of a possibly better fix involving removal of flattenScalarReferences. * libqpdf/Pl_AES_PDF.cc (finish): Don't complain if an AES input buffer is not a multiple of 16 bytes. Instead, just pad with nulls and hope for the best. PDF files have been encountered "in the wild" that contain AES buffers that aren't a multiple of 16 bytes. 2010-01-24 Jay Berkenbilt <ejb@ql.org> * 2.1.2: release * libqpdf/QPDFWriter.cc: fix logic error in padding calculation. When writing linearized files with cross reference streams, the padding calculation failed to take differences in sizes of compressed data between pass 1 and pass 2 into consideration. 2009-12-14 Jay Berkenbilt <ejb@ql.org> * 2.1.1: release * qpdf/qtest/qpdf.test: improve test for acroread to make sure it actually works and is not just present in the path. 2009-12-13 Jay Berkenbilt <ejb@ql.org> * libqpdf/qpdf/Pl_AES_PDF.hh: include <stdint.h>, if available, so we have valid definitions of uint32_t. 2009-10-30 Jay Berkenbilt <ejb@ql.org> * 2.1: release * libqpdf/QPDF.cc: be more forgiving of extraneous whitespace in the xref table and while recovering from error conditions. 2009-10-26 Jay Berkenbilt <ejb@ql.org> * Work around failure of PCRE test case; this test case exercises an aspect of PCRE that qpdf does not use, and the test fails with the version of PCRE on Red Hat Enterprise Linux 5, so we ignore failure on this particular test case. * Fix RPM .spec file to include "C" examples 2009-10-24 Jay Berkenbilt <ejb@ql.org> * 2.1.rc1: release * Provide interfaces for getting qpdf's own version number 2009-10-19 Jay Berkenbilt <ejb@ql.org> * include/qpdf/QPDF.hh (QPDF): getWarnings now returns a list of QPDFExc rather than a list of strings. This way, warnings may be inspected in more detail. * Include information about the last object read in most error messages. Most of the time, this will provide a good hint as to which object contains the error, but it's possible that the last object read may not necessarily be the one that has the error if the erroneous object was previously read and cached. 2009-10-18 Jay Berkenbilt <ejb@ql.org> * If forcing version, disable object stream creation and/or encryption if previous specifications are incompatible with new version. It is still possible that PDF content, compression schemes, etc., may be incompatible with the new version, but at least this way, older viewers will at least have a chance. * libqpdf/QPDFWriter.cc (unparseObject): avoid compressing Metadata streams if possible. 2009-10-13 Jay Berkenbilt <ejb@ql.org> * Upgrade embedded qtest to version 1.4, which allows the test suite to be run in Windows with MSYS and ActiveState Perl rather than requiring Cygwin perl. 2009-10-04 Jay Berkenbilt <ejb@ql.org> * Implement support AES encrypt and crypt filters. Implementation is not fully tested due to lack of test data but has been tested for several cases. 2009-10-04 Jay Berkenbilt <ejb@ql.org> * Add methods to QPDFWriter and corresponding command line arguments to qpdf to set the minimum output PDF version and also to force the version to a particular value. * libqpdf/QPDF.cc (processXRefStream): warn and ignore extra xref stream entries when stream is larger than reported size. This used to be a fatal error. (Fixes qpdf-Bugs-2872265.) 2009-09-27 Jay Berkenbilt <ejb@ql.org> * Add several methods to query permissions controlled by the encryption dictionary. Note that qpdf does not enforce these permissions even though it allows the user to query them. * The function QPDF::getUserPassword returned the user password with the required padding as specified by the PDF specification. This is seldom useful to users. This function has been replaced by QPDF::getPaddedUserPassword. Call the new QPDF::getTrimmedUserPassword to retreive the user password in a human-readable format. * qpdf/qpdf.cc (main): qpdf --check now prints the PDF version number in addition to its other output. 2009-09-26 Jay Berkenbilt <ejb@ql.org> * Removed all references to QEXC; now using std::runtime_error and std::logic_error and their subclasses for all exceptions. 2009-05-03 Jay Berkenbilt <ejb@ql.org> * 2.0.6: release * libqpdf/QPDF_Stream.cc (filterable): ignore /DecodeParms if it's not a type we recognize. (Fixes qpdf-Bugs-2779746.) 2009-03-10 Jay Berkenbilt <ejb@ql.org> * 2.0.5: release 2009-03-09 Jay Berkenbilt <ejb@ql.org> * libqpdf/Pl_LZWDecoder.cc: adjust LZWDecoder full table detection, now having been able to adequately test boundary conditions both and with and without early code change. Also compared implementation with other LZW decoders. 2009-03-08 Jay Berkenbilt <ejb@ql.org> * qpdf/fix-qdf (write_ostream): Adjust offsets while writing object streams to account for changes in the length of the dictionary and offset tables. * qpdf/qpdf.cc (main): In check mode, in addition to checking structure of file, attempt to decode all stream data. * libqpdf/QPDFWriter.cc (QPDFWriter::writeObject): In QDF mode, write a comment to the QDF file before each object that indicates the object ID of the corresponding object from the original file. Add --no-original-object-ids flag to qpdf and setSuppressOriginalObjectIDs() method to QPDFWriter to turn this behavior off. * libqpdf/QPDF.cc (QPDF::pipeStreamData): Issue a warning instead of failing if there is a problem found while decoding stream. * qpdf/qpdf.cc: Exit with a status of 3 if warnings were found regardless of what mode we're in. 2009-02-21 Jay Berkenbilt <ejb@ql.org> * 2.0.4: release 2009-02-20 Jay Berkenbilt <ejb@ql.org> * Fix many typos in comments and strings. * qpdf/qpdf.cc: in --check mode, if there are warnings but no errors, exit with a status of 3. * libqpdf/QPDF.cc (QPDF::insertXrefEntry): when recovering the cross-reference table, have objects we encounter later in the file supersede those we found earlier. This improves the chances of being able to recover appended files with damaged cross-reference tables. 2009-02-19 Jay Berkenbilt <ejb@ql.org> * libqpdf/Pl_LZWDecoder.cc: correct logic error for previously untested case of running the LZW decoder without the "early code change" flag. Thanks to a bug report from "Atom Smasher", I finally was able to obtain an input stream compressed in this way. 2009-02-15 Jay Berkenbilt <ejb@ql.org> * 2.0.3: release 2008-12-11 Jay Berkenbilt <ejb@ql.org> * qpdf/qpdf.cc (main): Accept -help and -version as well as --help and --version 2008-11-23 Jay Berkenbilt <ejb@ql.org> * Include stdio.h in a few files for proper compilation with (yet to be released) gcc 4.4 * updated embedded qtest to version 1.3 * libqpdf/QPDF_String.cc (QPDF_String::getUTF8Val): handle UTF-16BE properly rather than just treating the string as a string of 16-bit characters. 2008-06-30 Jay Berkenbilt <ejb@ql.org> * 2.0.2: release * updated embedded qtest to version 1.2 (includes previous changes) 2008-06-07 Jay Berkenbilt <ejb@ql.org> * qpdf/qtest/qpdf/diff-encrypted: change == to = so that the test suite passes when /bin/sh is not bash 2008-05-07 Jay Berkenbilt <ejb@ql.org> * qtest/bin/qtest-driver (run_test): increase timeout for qtest to be more tolerant of slow machines 2008-05-06 Jay Berkenbilt <ejb@ql.org> * 2.0.1: release * make/rules.mk: fix logic with .dep generation for .lo files so that dependencies work properly with libtool 2008-05-05 Jay Berkenbilt <ejb@ql.org> * libqpdf/qpdf/MD5.hh: fix header to be 64-bit clean * configure.ac: add tests for sized integer types 2008-05-04 Jay Berkenbilt <ejb@ql.org> * libqpdf/QPDF_encryption.cc: do not assume size_t is unsigned int * qpdf/qtest/qpdf.test: removed locale-specific tests. These were really to check bugs in perl 5.8.0 and are obsolete now. They also make the test suite fail in some environments that don't have all the locales fully configured. * various: updated several files for gcc 4.3 by adding missing includes (string.h, stdlib.h) 2008-04-26 Jay Berkenbilt <ejb@ql.org> * 2.0: initial public release
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