EVP_PKEY_CHECK(3ossl) OpenSSL EVP_PKEY_CHECK(3ossl)
NAME
EVP_PKEY_check, EVP_PKEY_param_check, EVP_PKEY_param_check_quick,
EVP_PKEY_public_check, EVP_PKEY_public_check_quick,
EVP_PKEY_private_check, EVP_PKEY_pairwise_check - key and parameter
validation functions
SYNOPSIS
#include <openssl/evp.h>
int EVP_PKEY_check(EVP_PKEY_CTX *ctx);
int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx);
int EVP_PKEY_param_check_quick(EVP_PKEY_CTX *ctx);
int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx);
int EVP_PKEY_public_check_quick(EVP_PKEY_CTX *ctx);
int EVP_PKEY_private_check(EVP_PKEY_CTX *ctx);
int EVP_PKEY_pairwise_check(EVP_PKEY_CTX *ctx);
DESCRIPTION
EVP_PKEY_param_check() validates the parameters component of the key
given by ctx. This check will always succeed for key types that do not
have parameters.
EVP_PKEY_param_check_quick() validates the parameters component of the
key given by ctx like EVP_PKEY_param_check() does. However some
algorithm implementations may offer a quicker form of validation that
omits some checks in order to perform a lightweight sanity check of the
key. If a quicker form is not provided then this function call does the
same thing as EVP_PKEY_param_check().
EVP_PKEY_public_check() validates the public component of the key given
by ctx.
EVP_PKEY_public_check_quick() validates the public component of the key
given by ctx like EVP_PKEY_public_check() does. However some algorithm
implementations may offer a quicker form of validation that omits some
checks in order to perform a lightweight sanity check of the key. If a
quicker form is not provided then this function call does the same
thing as EVP_PKEY_public_check().
EVP_PKEY_private_check() validates the private component of the key
given by ctx.
EVP_PKEY_pairwise_check() validates that the public and private
components have the correct mathematical relationship to each other for
the key given by ctx.
EVP_PKEY_check(3) is an alias for the EVP_PKEY_pairwise_check()
function.
NOTES
Key validation used by the OpenSSL FIPS provider complies with the
rules within SP800-56A and SP800-56B. For backwards compatibility
reasons the OpenSSL default provider may use checks that are not as
restrictive for certain key types. For further information see "DSA
key validation" in EVP_PKEY-DSA(7), "DH key validation" in
EVP_PKEY-DH(7), "EC key validation" in EVP_PKEY-EC(7) and "RSA key
validation" in EVP_PKEY-RSA(7).
Refer to SP800-56A and SP800-56B for rules relating to when these
functions should be called during key establishment. It is not
necessary to call these functions after locally calling an approved key
generation method, but may be required for assurance purposes when
receiving keys from a third party.
The EVP_PKEY_pairwise_check() and EVP_PKEY_private_check() might not be
bounded by any key size limits as private keys are not expected to be
supplied by attackers. For that reason they might take an unbounded
time if run on arbitrarily large keys.
RETURN VALUES
All functions return 1 for success or others for failure. They return
-2 if the operation is not supported for the specific algorithm.
SEE ALSO
EVP_PKEY_CTX_new(3), EVP_PKEY_fromdata(3), EVP_PKEY-DH(7),
EVP_PKEY-FFC(7), EVP_PKEY-DSA(7), EVP_PKEY-EC(7), EVP_PKEY-RSA(7),
HISTORY
EVP_PKEY_check(3), EVP_PKEY_public_check() and EVP_PKEY_param_check()
were added in OpenSSL 1.1.1.
EVP_PKEY_param_check_quick(), EVP_PKEY_public_check_quick(),
EVP_PKEY_private_check() and EVP_PKEY_pairwise_check() were added in
OpenSSL 3.0.
COPYRIGHT
Copyright 2006-2024 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>.
3.4.0 2024-10-29 EVP_PKEY_CHECK(3ossl)
openssl 3.4.0 - Generated Thu Nov 7 10:57:46 CST 2024