OPENSSL-CORE.H(7ossl)

💅 openssl/core.h — OpenSSL Core types 💅

okay bestie, so this is the openssl-core.h(7ossl) page from the OpenSSL manual, and it's honestly kind of a vibe. it's short, it's sweet, and it's literally the social network rules for how the OpenSSL libraries and the implementation providers talk to each other. 🫶

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✨ SYNOPSIS ✨

#include <openssl/core.h>

that's it. that's the whole synopsis. iconic behavior honestly. 🎀

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🌸 DESCRIPTION 🌸

the <openssl/core.h> header defines a bunch of public types, and those types are the ones used to communicate between the OpenSSL libraries and implementation providers. like, they're the group chat that keeps everybody in the loop. 💬

and the whole point — the design goal, the main character energy of it all — is to minimise the need for intimate knowledge of internal structures between the OpenSSL libraries and the providers. no cap, they do not want everybody digging through each other's private business. boundaries, bestie. 🚧

so here are the types, in the order the page lists them:

• OSSL_DISPATCH(3) — the dispatch type, with its own page 💫
• OSSL_ITEM(3) — the item type, with its own page 🌸
• OSSL_ALGORITHM(3) — the algorithm type, with its own page 👑
• OSSL_PARAM(3) — the param type, with its own page 🎀
• OSSL_CALLBACK(3) — the callback type, with its own page 🦋
• OSSL_PASSPHRASE_CALLBACK(3) — the passphrase callback type, with its own page 🔐

go read each one's own page, iykyk. that's where the actual details live. 📖✨

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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 they're not ancient lore, they're the newer era. 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>. ngl, read the license, it's giving responsible queen. 👑

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lowkey important: this page is the overview, not the deep dive — every single one of those types has its own man page, so don't try to build a whole app off the vibes alone. 😭

and that's the tea, bestie 💅✨ — this page is from OpenSSL 3.5.9, dated 2026-09-29, and it's the OPENSSL-CORE.H(7ossl) page, so go forth and dispatch responsibly. 🎀🦋🌸