6 Commits

Author	SHA1	Message	Date
Jay Berkenbilt	ec09b91443	Add QIntC::range_check_subtract	2021-11-04 13:53:46 -04:00
Jay Berkenbilt	9d64481571	Handle negative numbers in QIntC::range_check (fuzz issue 26994)	2020-11-21 13:43:04 -05:00
Jay Berkenbilt	6d81f01476	Don't assume char is signed in int conversion tests (fixes #361)	2019-09-17 12:18:09 -04:00
Jay Berkenbilt	0787ec9620	spell check	2019-08-31 08:43:18 -04:00
Jay Berkenbilt	d71f05ca07	Fix sign and conversion warnings (major) ... This makes all integer type conversions that have potential data loss explicit with calls that do range checks and raise an exception. After this commit, qpdf builds with no warnings when -Wsign-conversion -Wconversion is used with gcc or clang or when -W3 -Wd4800 is used with MSVC. This significantly reduces the likelihood of potential crashes from bogus integer values. There are some parts of the code that take int when they should take size_t or an offset. Such places would make qpdf not support files with more than 2^31 of something that usually wouldn't be so large. In the event that such a file shows up and is valid, at least qpdf would raise an error in the right spot so the issue could be legitimately addressed rather than failing in some weird way because of a silent overflow condition.	2019-06-21 13:17:21 -04:00
Jay Berkenbilt	a66828caff	New safe type converters in QIntC	2019-06-21 13:17:21 -04:00