5 EVP_KEYEXCH_fetch, EVP_KEYEXCH_free, EVP_KEYEXCH_up_ref, EVP_KEYEXCH_provider
6 - Functions to manage EVP_KEYEXCH algorithm objects
10 #include <openssl/evp.h>
12 EVP_KEYEXCH *EVP_KEYEXCH_fetch(OPENSSL_CTX *ctx, const char *algorithm,
13 const char *properties);
14 void EVP_KEYEXCH_free(EVP_KEYEXCH *exchange);
15 int EVP_KEYEXCH_up_ref(EVP_KEYEXCH *exchange);
16 OSSL_PROVIDER *EVP_KEYEXCH_provider(const EVP_KEYEXCH *exchange);
20 EVP_KEYEXCH_fetch() fetches the key exchange implementation for the given
21 B<algorithm> from any provider offering it, within the criteria given
23 See L<provider(7)/Fetching algorithms> for further information.
25 The returned value must eventually be freed with EVP_KEYEXCH_free().
27 EVP_KEYEXCH_free() decrements the reference count for the B<EVP_KEYEXCH>
28 structure. Typically this structure will have been obtained from an earlier call
29 to EVP_KEYEXCH_fetch(). If the reference count drops to 0 then the
32 EVP_KEYEXCH_up_ref() increments the reference count for an B<EVP_KEYEXCH>
35 EVP_KEYEXCH_provider() returns the provider that I<exchange> was fetched from.
39 EVP_KEYEXCH_fetch() returns a pointer to a B<EVP_KEYEXCH> for success
40 or B<NULL> for failure.
42 EVP_KEYEXCH_up_ref() returns 1 for success or 0 otherwise.
46 L<provider(7)/Fetching algorithms>, L<OSSL_PROVIDER(3)>
50 The functions described here were added in OpenSSL 3.0.
54 Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
56 Licensed under the Apache License 2.0 (the "License"). You may not use
57 this file except in compliance with the License. You can obtain a copy
58 in the file LICENSE in the source distribution or at
59 L<https://www.openssl.org/source/license.html>.