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97 lines
3.5 KiB
Plaintext
97 lines
3.5 KiB
Plaintext
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=pod
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=head1 NAME
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EVP_PKEY_check, EVP_PKEY_param_check, EVP_PKEY_param_check_quick,
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EVP_PKEY_public_check, EVP_PKEY_public_check_quick, EVP_PKEY_private_check,
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EVP_PKEY_pairwise_check
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- key and parameter validation functions
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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int EVP_PKEY_check(EVP_PKEY_CTX *ctx);
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int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx);
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int EVP_PKEY_param_check_quick(EVP_PKEY_CTX *ctx);
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int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx);
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int EVP_PKEY_public_check_quick(EVP_PKEY_CTX *ctx);
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int EVP_PKEY_private_check(EVP_PKEY_CTX *ctx);
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int EVP_PKEY_pairwise_check(EVP_PKEY_CTX *ctx);
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=head1 DESCRIPTION
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EVP_PKEY_param_check() validates the parameters component of the key
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given by B<ctx>. This check will always succeed for key types that do not have
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parameters.
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EVP_PKEY_param_check_quick() validates the parameters component of the key
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given by B<ctx> like EVP_PKEY_param_check() does. However some algorithm
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implementations may offer a quicker form of validation that omits some checks in
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order to perform a lightweight sanity check of the key. If a quicker form is not
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provided then this function call does the same thing as EVP_PKEY_param_check().
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EVP_PKEY_public_check() validates the public component of the key given by B<ctx>.
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EVP_PKEY_public_check_quick() validates the public component of the key
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given by B<ctx> like EVP_PKEY_public_check() does. However some algorithm
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implementations may offer a quicker form of validation that omits some checks in
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order to perform a lightweight sanity check of the key. If a quicker form is not
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provided then this function call does the same thing as EVP_PKEY_public_check().
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EVP_PKEY_private_check() validates the private component of the key given by B<ctx>.
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EVP_PKEY_pairwise_check() validates that the public and private components have
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the correct mathematical relationship to each other for the key given by B<ctx>.
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EVP_PKEY_check() is an alias for the EVP_PKEY_pairwise_check() function.
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=head1 NOTES
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Key validation used by the OpenSSL FIPS provider complies with the rules
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within SP800-56A and SP800-56B. For backwards compatibility reasons the OpenSSL
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default provider may use checks that are not as restrictive for certain key types.
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For further information see L<EVP_PKEY-DSA(7)/DSA key validation>,
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L<EVP_PKEY-DH(7)/DH key validation>, L<EVP_PKEY-EC(7)/EC key validation> and
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L<EVP_PKEY-RSA(7)/RSA key validation>.
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Refer to SP800-56A and SP800-56B for rules relating to when these functions
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should be called during key establishment.
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It is not necessary to call these functions after locally calling an approved key
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generation method, but may be required for assurance purposes when receiving
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keys from a third party.
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=head1 RETURN VALUES
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All functions return 1 for success or others for failure.
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They return -2 if the operation is not supported for the specific algorithm.
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=head1 SEE ALSO
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L<EVP_PKEY_CTX_new(3)>,
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L<EVP_PKEY_fromdata(3)>,
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L<EVP_PKEY-DH(7)>,
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L<EVP_PKEY-FFC(7)>,
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L<EVP_PKEY-DSA(7)>,
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L<EVP_PKEY-EC(7)>,
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L<EVP_PKEY-RSA(7)>,
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=head1 HISTORY
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EVP_PKEY_check(), EVP_PKEY_public_check() and EVP_PKEY_param_check() were added
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in OpenSSL 1.1.1.
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EVP_PKEY_param_check_quick(), EVP_PKEY_public_check_quick(),
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EVP_PKEY_private_check() and EVP_PKEY_pairwise_check() were added in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2006-2022 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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