$NetBSD: X509_check_private_key.3,v 1.8 2024/09/08 13:08:37 christos Exp $
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Title "X509_check_private_key 3"
way too many mistakes in technical documents.
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Title "X509_check_private_key 3"
X509_check_private_key 3 2024-09-03 3.0.15 OpenSSL
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NAME
X509_check_private_key, X509_REQ_check_private_key - check the consistency
of a private key with the public key in an X509 certificate or certificate
request
SYNOPSIS
Header "SYNOPSIS" .Vb 1
#include <openssl/x509.h>
\&
int X509_check_private_key(X509 *x, EVP_PKEY *k);
\&
int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k);
.Ve
DESCRIPTION
Header "DESCRIPTION" \fBX509_check_private_key() function checks the consistency of private
key k with the public key in x.
\fBX509_REQ_check_private_key() is equivalent to X509_check_private_key() except that x represents a certificate request of structure X509_REQ.
"RETURN VALUES"
Header "RETURN VALUES" \fBX509_check_private_key() and X509_REQ_check_private_key() return 1 if
the keys match each other, and 0 if not.
If the key is invalid or an error occurred, the reason code can be obtained using ERR_get_error\|(3).
BUGS
Header "BUGS" The check_private_key functions don't check if k itself is indeed
a private key or not. It merely compares the public materials (e.g. exponent
and modulus of an RSA key) and/or key parameters (e.g. EC params of an EC key)
of a key pair. So if you pass a public key to these functions in k, it will
return success.
"SEE ALSO"
Header "SEE ALSO" \fBERR_get_error\|(3)
COPYRIGHT
Header "COPYRIGHT" Copyright 2017-2018 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>.