The International Obfuscated C Code Contest (abbreviated IOCCC) is a computer programming contest for the most creatively obfuscated C code.Held annually, it is described as "celebrating [C's] syntactical opaqueness". To provide a safe forum for poor C code.

Rules vary from year to year and are posted with a set of guidelines that attempt to convey the spirit of the rules. In a very naive login program, which obfuscates two strings (username and password) the following binary file bloat exists.This output is generated by running calculate_bloat.py To illustrate some of the subtleties of the C language. One can simply open up the binary file in a text editor to see all of the embedded string literals in plain view. Obfuscated C Code Unless otherwise indicated, the code comes from the International Obfuscated C code contest.

to darken < fuscus, dark.] GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. ‘Another obfuscation involved the use of the term 'counter-insurgency'.’ ‘I regard this as a deliberate piece of obfuscation.’ ‘She made it clear police obfuscation would not be allowed to continue.’ You really need to see the source code to appreciate most of these. To stress C compilers with unusual code. As a result, several of the past entries may not compile directly in a modern compiler, and some may cause crashes.
It must have seemed reasonable at the time.I found that calculating prime numbers up to 1024 makes the program include itself over 6.8 million times.Contributions have included source code formatted to resemble images, text, etc., after the manner of In the effort to take obfuscation to its extremes, contestants have produced programs which skirt around the edges of C standards, or result in constructs which trigger rarely used code path combinations in compilers.

Guaranteed compile-time string literal obfuscation header-only library for C++14 The rules are often deliberately written with loopholes that contestants are encouraged to find and abuse.Entries often employ strange or unusual tricks, such as using the C preprocessor to do things it was not designed to do, or avoiding commonly used constructs in the C programming language in favor of much more obscure ways of achieving the same thing. A special utility called For example, the following program will not store the string "Hello World" in plain text anywhere in the compiled executable.This does come at a small cost.

To show the importance of programming style, in an ironic way. C/C++ machine code obfuscation. Two contest winners generated a list of prime numbers using the C preprocessor "spectacularly", according to To keep things simple, I have avoided the C preprocessor and tricky statements such as "if", "for", "do", "while", "switch", and "goto".We still aren't sure whether or not this is a useful program, but it's the first atomic fission we've seen in the IOCCC.Why not use the program to hide another program in the program? Within the code size limit of only a few kilobytes, contestants have managed to do complicated things – a 2004 winner turned out an operating system.On February 2, 2014, the author published the book As of February 7, 2010, it appears to be one of only two chess engines written in less than 2 kilobytes of C that are able to play full legal chess moves, along with Another example is the following flight simulator, the winner of the 1998 IOCCC,This program needs the following command line on a Linux system to be compiled:using gcc, compile with the following command line: Guaranteed compile-time string literal obfuscation header-only library for C++14.Now your project will not expose those strings in plain text in the binary image.When plain text string literals are used in C++ programs, they will be compiled as-is into the resultant binary. The IOCCC: To write the most Obscure/Obfuscated C program within the rules. The judging process is documented in the competition guidelinesCompared with other programming contests, the IOCCC is described as "not all that serious" by Each year, the rules of the contest are published on the IOCCC website. This causes them to be incredibly easy to find. Entries are evaluated anonymously by a panel of judges.

-obfuscation n. obfuscatory adj.

c c-plus-plus obfuscation obfuscator machine-code Updated Nov 8, 2017; Assembly; Load more… Improve this page Add a description, image, and links to the obfuscator topic page so that developers can more easily learn about it. Use Git or checkout with SVN using the web URL.
Most files contain an explanatory text file appended to the ANSI C code. Wrap security sensitive strings with AY_OBFUSCATE("My String") The winning code for the 27th contest, held in 2020, was released in July 2020. Guaranteed compile-time string literal obfuscation header-only library for C++14


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