5 evp_pkey_make_provided - internal EVP_PKEY support functions for providers
9 /* Only for EVP source */
10 #include "evp_local.h"
12 void *evp_pkey_make_provided(EVP_PKEY *pk, OPENSSL_CTX *libctx,
13 EVP_KEYMGMT **keymgmt, const char *propquery);
17 evp_pkey_make_provided() ensures that the B<EVP_PKEY> I<pk> is provided within
18 the library context I<libctx> (NULL means the default context). I<keymgmt>
19 may point at a reference to a B<EVP_KEYMGMT>, and works as an input/output
21 As input to this function, it can be used to specify a B<EVP_KEYMGMT> to be
22 used for exporting. If not (I<*keymgmt> is NULL), then this function will
23 fetch an B<EVP_KEYMGMT> implicitly, using I<propquery> as property query string.
24 As output from this function, I<*keymgmt> will be assigned the B<EVP_KEYMGMT>
25 that was used, if the export was successful, otherwise it will be assigned NULL.
27 If I<pk> has an assigned legacy key, a check is done to see if any of
28 its key material has changed since last export, by comparing the
29 result of the legacy key's dirty_cnt() method with a copy of that
30 result from last time evp_pkey_make_provided() was run with this
32 If it has, the cache of already exported keys is cleared, and a new
33 export is made with the new legacy key material.
37 evp_pkey_make_provided() returns the provider key data that was exported if
38 I<pk> was successfully provided. Otherwise, NULL is returned.
42 Some functions calling evp_pkey_make_provided() may have received a const
43 key, and may therefore have to cast the key to non-const form to call this
44 function. Since B<EVP_PKEY> is always dynamically allocated, this is OK.
48 L<OPENSSL_CTX(3)>, L<EVP_KEYMGMT(3)>
52 The functions described here were all added in OpenSSL 3.0.
56 Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
58 Licensed under the Apache License 2.0 (the "License"). You may not use
59 this file except in compliance with the License. You can obtain a copy
60 in the file LICENSE in the source distribution or at
61 L<https://www.openssl.org/source/license.html>.