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Editing: X509_check_private_key.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "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 .SH "SYNOPSIS" .IX 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 .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBX509_check_private_key()\fR function checks the consistency of private key \fBk\fR with the public key in \fBx\fR. .PP \&\fBX509_REQ_check_private_key()\fR is equivalent to \fBX509_check_private_key()\fR except that \fBx\fR represents a certificate request of structure \fBX509_REQ\fR. .SH "RETURN VALUE" .IX Header "RETURN VALUE" \&\fBX509_check_private_key()\fR and \fBX509_REQ_check_private_key()\fR return 1 if the keys match each other, and 0 if not. .PP If the key is invalid or an error occurred, the reason code can be obtained using \fBERR_get_error\fR\|(3). .SH "BUGS" .IX Header "BUGS" The \fBcheck_private_key\fR functions don't check if \fBk\fR itself is indeed a private key or not. It merely compares the public materials (e.g. exponent and modulus of an \s-1RSA\s0 key) and/or key parameters (e.g. \s-1EC\s0 params of an \s-1EC\s0 key) of a key pair. So if you pass a public key to these functions in \fBk\fR, it will return success. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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