EVP_PKEY_CTX_GET_ALGOR(3SSL) OpenSSL EVP_PKEY_CTX_GET_ALGOR(3SSL)
NAME
EVP_CIPHER_CTX_get_algor, EVP_CIPHER_CTX_get_algor_params,
EVP_CIPHER_CTX_set_algor_params, EVP_PKEY_CTX_get_algor,
EVP_PKEY_CTX_get_algor_params, EVP_PKEY_CTX_set_algor_params - pass
AlgorithmIdentifier and its params to/from algorithm implementations
SYNOPSIS
int EVP_TYPE_CTX_get_algor(EVP_TYPE_CTX *ctx, X509_ALGOR **alg);
int EVP_TYPE_CTX_get_algor_params(EVP_TYPE_CTX *ctx, X509_ALGOR *alg);
int EVP_TYPE_CTX_set_algor_params(EVP_TYPE_CTX *ctx, const X509_ALGOR *alg);
DESCRIPTION
In the description here and the "SYNOPSIS" above, TYPE is used as a
placeholder for any EVP operation type.
EVP_TYPE_CTX_get_algor() attempts to retrieve a complete
AlgorithmIdentifier from the EVP_TYPE implementation, and populates *alg
with it. If alg is NULL, calling this function will serve to see if
calling this function is supported at all by the EVP_TYPE
implementation. If *alg is NULL, space will be allocated automatically,
and assigned to *alg.
EVP_TYPE_CTX_get_algor_params() attempts to retrieve the parameters part
of an AlgorithmIdentifier from the EVP_TYPE implementation, and
populates alg-parameters> with it. If alg is NULL, calling this
function will serve to see if calling this function is supported at all
by the EVP_TYPE implementation. If alg->parameters is NULL, space will
be allocated automatically, and assigned to alg->parameters. If
alg->parameters is not NULL, its previous contents will be overwritten
with the retrieved AlgorithmIdentifier parameters. Beware!
EVP_TYPE_CTX_set_algor_params() attempts to pass alg->parameters to the
EVP_TYPE implementation. If alg is NULL, calling this function will
serve to see if calling this function is supported at all by the
EVP_TYPE implementation.
RETURN VALUES
All functions return 1 for success, and 0 or a negative number if an
error occurs. In particular, -2 is returned when the function isn't
supported by the EVP_TYPE implementation.
HISTORY
These functions were added in OpenSSL 3.4.
COPYRIGHT
Copyright 2024 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>.
3.5.7 2026-06-09 EVP_PKEY_CTX_GET_ALGOR(3SSL)
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