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EVP_KDF-X942-CONCAT(7SSL) OpenSSL EVP_KDF-X942-CONCAT(7SSL)

📛 NAME

EVP_KDF-X942-CONCAT - The X942 Concat EVP_KDF implementation

🚀 Quick Reference

Use Case	Command	Description
🔑 Obtain KDF implementation	EVP_KDF_fetch(NULL, "X942KDF_CONCAT", NULL)	Fetch the X942 Concat KDF (alias for X963KDF)
🔗 Derive key from shared secret	EVP_KDF_derive(kdf, key, keylen, params)	Derive key using shared secret and shared info
🔍 Set shared secret	EVP_KDF_ctrl(kdf, EVP_KDF_CTRL_SET_SHARED_SECRET, ...)	Provide the shared secret key for derivation
📝 Set shared info	EVP_KDF_ctrl(kdf, EVP_KDF_CTRL_SET_INFO, ...)	Provide additional shared info for key derivation

💡 For full details, see EVP_KDF-X963(7).

📖 DESCRIPTION

The EVP_KDF-X942-CONCAT algorithm is identical to EVP_KDF-X963. It is used for key agreement to derive a key using input such as a shared secret key and shared info.

🔑 Identity

"X942KDF_CONCAT" is the name for this implementation; it can be used with the EVP_KDF_fetch() function.

This is an alias for "X963KDF".

See EVP_KDF-X963(7) for a list of supported parameters and examples.

📜 HISTORY

This functionality was added to OpenSSL 3.0.

©️ 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>.

3.0.2 2026-06-02 EVP_KDF-X942-CONCAT(7SSL)

📛 NAME 🚀 Quick Reference 📖 DESCRIPTION 📜 HISTORY ©️ COPYRIGHT