EVP_KDF-X942-CONCAT(7ossl)

💖 NAME 💖

Okay bestie, welcome to the EVP_KDF-X942-CONCAT(7ossl) page — we're talking about EVP_KDF-X942-CONCAT, aka The X942 Concat EVP_KDF implementation. Yes, that's the whole name. Slay. ✨

🦋 DESCRIPTION 🦋

So here's the tea: the EVP_KDF-X942-CONCAT algorithm is literally identical to EVP_KDF-X963. No cap. It's used for key agreement — deriving a key using input such as a shared secret key and shared info. That's the vibe. 💅

✨ Identity ✨

"X942KDF_CONCAT" is the name for this implementation, and you can use it with the EVP_KDF_fetch() function. Iconic.

This is an alias for "X963KDF". Periodt.

For a list of supported parameters and examples, see EVP_KDF-X963(7) — go check it out, bestie. 🫶

🌸 HISTORY 🌸

This functionality was added in OpenSSL 3.0. A whole moment. 💖

🎀 COPYRIGHT 🎀

Copyright 2020-2021 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>. 💜

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Signing off with OpenSSL 3.5.6, dated 2026-04-07 — later bestie! 💅✨