OPENSSL-CORE.H(7ossl)

💖 NAME 💖

openssl/core.h — the OpenSSL Core types, bestie!! this is the header that holds all the lil' public typedefs the OpenSSL libraries and implementation providers use to ~talk to each other~ ✨

(the manual name is 7ossl, and you're reading the page for openssl-core.h, just so we're clear 🫶)

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🌸 SYNOPSIS 🌸

#include <openssl/core.h>

that's it. that's the whole vibe check. one include and you're in 👑

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✨ DESCRIPTION ✨

okay so the <openssl/core.h> header defines a bunch of public types that get used to communicate between the OpenSSL libraries and implementation providers. and the way they're designed?? iconic. their whole ~purpose~ is to minimise the need for intimate knowledge of internal structures between the OpenSSL libraries and the providers — like, no cap, they keep things from getting all up in each other's business 💅

the types are, in order, and yes every single one of them is getting its own moment:

• OSSL_DISPATCH(3)
• OSSL_ITEM(3)
• OSSL_ALGORITHM(3)
• OSSL_PARAM(3)
• OSSL_CALLBACK(3)
• OSSL_PASSPHRASE_CALLBACK(3)

each one has its own manual page (the (3) is giving "go read that one next", and honestly you should 🎀)

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🦋 SEE ALSO 🦋

• openssl-core_dispatch.h(7) — the sibling header page, go say hi 💜

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🌈 HISTORY 🌈

the types described here were added in OpenSSL 3.0 — so if you're on something older, they literally didn't exist yet, periodt.

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🎀 COPYRIGHT 🎀

Copyright 2019-2021 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 bestie, read the license before you go copying stuff — it's not a suggestion, it's the rules 🙈

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and that's a wrap!! this page was brought to you by OpenSSL version 3.5.6, dated 2026-04-07, and the manpage goes by OPENSSL-CORE.H(7ossl) — mwah, slay, see you in the next section 💅✨🍓