mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
89 lines
3.4 KiB
Plaintext
89 lines
3.4 KiB
Plaintext
|
=pod
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
#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);
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_fetch() fetches the implementation for the given
|
||
|
|
B<algorithm> from any provider offering it, within the criteria given
|
||
|
|
by the B<properties> and in the scope of the given library context B<ctx> (see
|
||
|
|
L<OPENSSL_CTX(3)>). The algorithm will be one offering functions for performing
|
||
|
|
asymmetric cipher related tasks such as asymmetric encryption and decryption.
|
||
|
|
See L<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 B<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
|
||
|
|
B<EVP_ASYM_CIPHER> structure.
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_is_a() returns 1 if I<cipher> is an implementation of an
|
||
|
|
algorithm that's identifiable with I<name>, otherwise 0.
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_provider() returns the provider that I<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 I<libctx>, and for each of
|
||
|
|
the implementations, calls the given function I<fn> with the implementation
|
||
|
|
method and the given I<arg> as argument.
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_number() returns the internal dynamic number assigned to
|
||
|
|
I<cipher>.
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_names_do_all() traverses all names for I<cipher>, and calls
|
||
|
|
I<fn> with each name and I<data>.
|
||
|
|
|
||
|
|
=head1 RETURN VALUES
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_fetch() returns a pointer to an B<EVP_ASYM_CIPHER> for success
|
||
|
|
or B<NULL> for failure.
|
||
|
|
|
||
|
|
EVP_ASYM_CIPHER_up_ref() returns 1 for success or 0 otherwise.
|
||
|
|
|
||
|
|
=head1 SEE ALSO
|
||
|
|
|
||
|
|
L<provider(7)/Fetching algorithms>, L<OSSL_PROVIDER(3)>
|
||
|
|
|
||
|
|
=head1 HISTORY
|
||
|
|
|
||
|
|
The functions described here were added in OpenSSL 3.0.
|
||
|
|
|
||
|
|
=head1 COPYRIGHT
|
||
|
|
|
||
|
|
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
|
||
|
|
L<https://www.openssl.org/source/license.html>.
|
||
|
|
|
||
|
|
=cut
|