EVP_ASYM_CIPHER_fetch, EVP_ASYM_CIPHER_free, EVP_ASYM_CIPHER_up_ref, EVP_ASYM_CIPHER_number, EVP_ASYM_CIPHER_is_a, EVP_ASYM_CIPHER_provider, EVP_ASYM_CIPHER_do_all_provided, EVP_ASYM_CIPHER_names_do_all - Functions to manage EVP_ASYM_CIPHER algorithm objects
#include <openssl/evp.h>
EVP_ASYM_CIPHER *EVP_ASYM_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, const char *properties); void EVP_ASYM_CIPHER_free(EVP_ASYM_CIPHER *cipher); int EVP_ASYM_CIPHER_up_ref(EVP_ASYM_CIPHER *cipher); int EVP_ASYM_CIPHER_number(const EVP_ASYM_CIPHER *cipher); int EVP_ASYM_CIPHER_is_a(const EVP_ASYM_CIPHER *cipher, const char *name); OSSL_PROVIDER *EVP_ASYM_CIPHER_provider(const EVP_ASYM_CIPHER *cipher); void EVP_ASYM_CIPHER_do_all_provided(OPENSSL_CTX *libctx, void (*fn)(EVP_ASYM_CIPHER *cipher, void *arg), void *arg); void EVP_ASYM_CIPHER_names_do_all(const EVP_ASYM_CIPHER *cipher, void (*fn)(const char *name, void *data), void *data);
EVP_ASYM_CIPHER_fetch()
fetches the implementation for the given
algorithm from any provider offering it, within the criteria given
by the properties and in the scope of the given library context ctx (see
OPENSSL_CTX(3)). The algorithm will be one offering functions for performing
asymmetric cipher related tasks such as asymmetric encryption and decryption.
See provider(7)/Fetching algorithms for further information.
The returned value must eventually be freed with EVP_ASYM_CIPHER_free()
.
EVP_ASYM_CIPHER_free()
decrements the reference count for the EVP_ASYM_CIPHER
structure. Typically this structure will have been obtained from an earlier call
to EVP_ASYM_CIPHER_fetch()
. If the reference count drops to 0 then the
structure is freed.
EVP_ASYM_CIPHER_up_ref()
increments the reference count for an
EVP_ASYM_CIPHER structure.
EVP_ASYM_CIPHER_is_a()
returns 1 if cipher is an implementation of an
algorithm that's identifiable with name, otherwise 0.
EVP_ASYM_CIPHER_provider()
returns the provider that cipher was fetched from.
EVP_ASYM_CIPHER_do_all_provided()
traverses all EVP_ASYM_CIPHERs implemented by
all activated providers in the given library context libctx, and for each of
the implementations, calls the given function fn with the implementation
method and the given arg as argument.
EVP_ASYM_CIPHER_number()
returns the internal dynamic number assigned to
cipher.
EVP_ASYM_CIPHER_names_do_all()
traverses all names for cipher, and calls
fn with each name and data.
EVP_ASYM_CIPHER_fetch()
returns a pointer to an EVP_ASYM_CIPHER for success
or NULL for failure.
EVP_ASYM_CIPHER_up_ref()
returns 1 for success or 0 otherwise.
provider(7)/Fetching algorithms, OSSL_PROVIDER(3)
The functions described here were added in OpenSSL 3.0.
Copyright 2019 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.