5 OSSL_PARAM_dup, OSSL_PARAM_merge, OSSL_PARAM_free
6 - OSSL_PARAM array copy functions
10 #include <openssl/params.h>
12 OSSL_PARAM *OSSL_PARAM_dup(const OSSL_PARAM *params);
13 OSSL_PARAM *OSSL_PARAM_merge(const OSSL_PARAM *params, const OSSL_PARAM *params1);
14 void OSSL_PARAM_free(OSSL_PARAM *params);
18 Algorithm parameters can be exported/imported from/to providers using arrays of
19 B<OSSL_PARAM>. The following utility functions allow the parameters to be
20 duplicated and merged with other B<OSSL_PARAM> to assist in this process.
22 OSSL_PARAM_dup() duplicates the parameter array I<params>. This function does a
23 deep copy of the data.
25 OSSL_PARAM_merge() merges the parameter arrays I<params> and I<params1> into a
26 new parameter array. If I<params> and I<params1> contain values with the same
27 'key' then the value from I<params1> will replace the I<param> value. This
28 function does a shallow copy of the parameters. Either I<params> or I<params1>
29 may be NULL. The behaviour of the merge is unpredictable if I<params> and
30 I<params1> contain the same key, and there are multiple entries within either
31 array that have the same key.
33 OSSL_PARAM_free() frees the parameter array I<params> that was created using
34 OSSL_PARAM_dup(), OSSL_PARAM_merge() or OSSL_PARAM_BLD_to_param().
38 The functions OSSL_PARAM_dup() and OSSL_PARAM_merge() return a newly allocated
39 B<OSSL_PARAM> array, or NULL if there was an error. If both parameters are NULL
40 then NULL is returned.
44 L<OSSL_PARAM(3)>, L<OSSL_PARAM_BLD(3)>
48 The functions were added in OpenSSL 3.0.
52 Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
54 Licensed under the Apache License 2.0 (the "License"). You may not use
55 this file except in compliance with the License. You can obtain a copy
56 in the file LICENSE in the source distribution or at
57 L<https://www.openssl.org/source/license.html>.