1=pod 2 3=head1 NAME 4 5X509_check_private_key, X509_REQ_check_private_key - check the consistency 6of a private key with the public key in an X509 certificate or certificate 7request 8 9=head1 SYNOPSIS 10 11 #include <openssl/x509.h> 12 13 int X509_check_private_key(X509 *x, EVP_PKEY *k); 14 15 int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k); 16 17=head1 DESCRIPTION 18 19X509_check_private_key() function checks the consistency of private 20key B<k> with the public key in B<x>. 21 22X509_REQ_check_private_key() is equivalent to X509_check_private_key() 23except that B<x> represents a certificate request of structure B<X509_REQ>. 24 25=head1 RETURN VALUES 26 27X509_check_private_key() and X509_REQ_check_private_key() return 1 if 28the keys match each other, and 0 if not. 29 30If the key is invalid or an error occurred, the reason code can be 31obtained using L<ERR_get_error(3)>. 32 33=head1 BUGS 34 35The B<check_private_key> functions don't check if B<k> itself is indeed 36a private key or not. It merely compares the public materials (e.g. exponent 37and modulus of an RSA key) and/or key parameters (e.g. EC params of an EC key) 38of a key pair. So if you pass a public key to these functions in B<k>, it will 39return success. 40 41=head1 SEE ALSO 42 43L<ERR_get_error(3)> 44 45=head1 COPYRIGHT 46 47Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved. 48 49Licensed under the OpenSSL license (the "License"). You may not use 50this file except in compliance with the License. You can obtain a copy 51in the file LICENSE in the source distribution or at 52L<https://www.openssl.org/source/license.html>. 53 54=cut 55