BIO_F_NULL(3SSL)

💖 BIO_f_null — the null filter, bestie 💖

okay so this is BIO_f_null from the OpenSSL manuals (that's the 3SSL section, iykyk). it's giving "barely a manpage" energy and honestly? iconic for that. let's get into it 🫶

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✨ NAME ✨

BIO_f_null — the null filter 🌈

that's it. that's the whole name. short king behavior. 💅

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🌸 SYNOPSIS 🌸

#include <openssl/bio.h>

const BIO_METHOD *BIO_f_null(void);

like, that's the whole vibe. one include, one function, zero drama. 🎀

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🦋 DESCRIPTION 🦋

so BIO_f_null() returns the null filter BIO method. and what is that, you ask? bestie it is literally a filter BIO that does nothing. nothing!! it's the friend who shows up to the group chat, says nothing, and leaves. 😭

here's the part that actually matters tho: all requests to a null filter BIO get passed through to the next BIO in the chain. so a BIO chain that has a null filter BIO in it behaves exactly as though that BIO was never even there. it's a ghost. a little invisible no-op buddy. 👻✨

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💀 NOTES 💀

and like… as may be apparent (and it is apparent, let's be real), a null filter BIO is not particularly useful. the manpage said it, not me. 🙈 it's the "I'm just here so I don't get fined" of BIOs.

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👑 RETURN VALUES 👑

BIO_f_null() returns the null filter BIO method. that's the whole return value. one thing. it gives one thing. 😌

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💜 COPYRIGHT 💜

Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

fr fr read the license before you go doing anything wild with this. no cap. 🫶

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🍓 sign-off 🍓

this was BIO_F_NULL(3SSL) from OpenSSL version 4.0.3, dated 2026-09-29. that's a wrap bestie, go touch some grass, drink some water, and remember: even the BIO that does nothing deserves love. periodt. 💖✨🎀🦋🌸💅