|  | =pod | 
|  |  | 
|  | =head1 NAME | 
|  |  | 
|  | EVP_KDF-X942-CONCAT - The X942 Concat EVP_KDF implementation | 
|  |  | 
|  | =head1 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. | 
|  |  | 
|  | =head2 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 L<EVP_KDF-X963(7)> for a list of supported parameters and examples. | 
|  |  | 
|  | =head1 HISTORY | 
|  |  | 
|  | This functionality was added to OpenSSL 3.0. | 
|  |  | 
|  | =head1 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 | 
|  | L<https://www.openssl.org/source/license.html>. | 
|  |  | 
|  | =cut |