EVP_PKEY_CTX_SET_PARAMS(3ossl) OpenSSL EVP_PKEY_CTX_SET_PARAMS(3ossl)
NAME
EVP_PKEY_CTX_set_params, EVP_PKEY_CTX_settable_params,
EVP_PKEY_CTX_get_params, EVP_PKEY_CTX_gettable_params - provider
parameter passing operations
SYNOPSIS
#include <openssl/evp.h>
int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, const OSSL_PARAM *params);
const OSSL_PARAM *EVP_PKEY_CTX_settable_params(const EVP_PKEY_CTX *ctx);
int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(const EVP_PKEY_CTX *ctx);
DESCRIPTION
The EVP_PKEY_CTX_set_params(3) functions
allow transfer of arbitrary key parameters to and from providers. Not
all parameters may be supported by all providers. See OSSL_PROVIDER(3)
for more information on providers. The params field is a pointer to a
list of OSSL_PARAM structures, terminated with a OSSL_PARAM_END(3)
struct. See OSSL_PARAM(3) for information about passing parameters.
These functions must only be called after the EVP_PKEY_CTX has been
initialised for use in an operation. These methods replace the
EVP_PKEY_CTX_ctrl() mechanism. (EVP_PKEY_CTX_ctrl now calls these
methods internally to interact with providers).
EVP_PKEY_CTX_gettable_params() and EVP_PKEY_CTX_settable_params() get a
constant OSSL_PARAM(3) array that describes the gettable and settable
parameters for the current algorithm implementation, i.e. parameters
that can be used with EVP_PKEY_CTX_get_params() and
EVP_PKEY_CTX_set_params(3) respectively. These functions must only be
called after the EVP_PKEY_CTX has been initialised for use in an
operation.
Parameters
Examples of EVP_PKEY parameters include the following:
"Common parameters" in provider-keymgmt(7) "Key Exchange parameters" in
provider-keyexch(7) "Signature parameters" in provider-signature(7)
"Common RSA parameters" in EVP_PKEY-RSA(7) "RSA key generation
parameters" in EVP_PKEY-RSA(7) "FFC parameters" in EVP_PKEY-FFC(7) "FFC
key generation parameters" in EVP_PKEY-FFC(7) "DSA parameters" in
EVP_PKEY-DSA(7) "DSA key generation parameters" in EVP_PKEY-DSA(7) "DH
parameters" in EVP_PKEY-DH(7) "DH key generation parameters" in
EVP_PKEY-DH(7) "Common EC parameters" in EVP_PKEY-EC(7) "Common X25519,
X448, ED25519 and ED448 parameters" in EVP_PKEY-X25519(7)
RETURN VALUES
EVP_PKEY_CTX_set_params(3) returns 1 for success or 0 otherwise.
EVP_PKEY_CTX_settable_params() returns an OSSL_PARAM array on success
or NULL on error. It may also return NULL if there are no settable
parameters available.
All other functions and macros described on this page return a positive
value for success and 0 or a negative value for failure. In particular
a return value of -2 indicates the operation is not supported by the
public key algorithm.
SEE ALSO
EVP_PKEY_CTX_new(3), EVP_PKEY_encrypt(3), EVP_PKEY_decrypt(3),
EVP_PKEY_sign(3), EVP_PKEY_verify(3), EVP_PKEY_verify_recover(3),
EVP_PKEY_derive(3), EVP_PKEY_keygen(3)
HISTORY
All functions were added in OpenSSL 3.0.
COPYRIGHT
Copyright 2020-2024 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>.
3.3.2 2024-09-04 EVP_PKEY_CTX_SET_PARAMS(3ossl)
openssl 3.3.2 - Generated Thu Sep 12 15:10:06 CDT 2024