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Diels-grabsch2: Self Hashing C Program (2019)

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Diels-grabsch2: Self Hashing C Program (2019)

#1

Post by icwtyjj » Thu, Mar 12, 2026, 10:00 PM UTC

Diels-grabsch2: Self Hashing C Program (2019)
ioccc.org

Re: Diels-grabsch2: Self Hashing C Program (2019)

#2

Post by casey2 » Tue, Mar 17, 2026, 3:26 PM UTC

I thought it would print the hash of its binary :/

Re: Diels-grabsch2: Self Hashing C Program (2019)

#3

Post by AlotOfReading » Tue, Mar 17, 2026, 4:22 PM UTC

casey2 wrote: post #2

I thought it would print the hash of its binary :/

That's not too difficult. You can #embed CC, invoke it on the program's source code via the exec functions, and hash the result.

Re: Diels-grabsch2: Self Hashing C Program (2019)

#4

Post by zvr » Wed, Mar 18, 2026, 12:27 PM UTC

AlotOfReading wrote: post #3

casey2 wrote: post #2

I thought it would print the hash of its binary :/

That's not too difficult. You can #embed CC, invoke it on the program's source code via the exec functions, and hash the result.

It's even easier to exec a hash of argv[0] and print it.

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