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.\" ========================================================================
.\"
.IX Title "SSL_GET_CERTIFICATE 3ossl"
.TH SSL_GET_CERTIFICATE 3ossl "2024-09-03" "3.1.7+quic" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
SSL_get_certificate, SSL_get_privatekey \- retrieve TLS/SSL certificate and
private key
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& X509 *SSL_get_certificate(const SSL *s);
\& EVP_PKEY *SSL_get_privatekey(const SSL *s);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_get_certificate()\fR returns a pointer to an \fBX509\fR object representing a
certificate used as the local peer's identity.
.PP
Multiple certificates can be configured; for example, a server might have both
\&\s-1RSA\s0 and \s-1ECDSA\s0 certificates. The certificate which is returned by
\&\fBSSL_get_certificate()\fR is determined as follows:
.IP "\(bu" 4
If it is called before certificate selection has occurred, it returns the most
recently added certificate, or \s-1NULL\s0 if no certificate has been added.
.IP "\(bu" 4
After certificate selection has occurred, it returns the certificate which was
selected during the handshake, or \s-1NULL\s0 if no certificate was selected (for
example, on a client where no client certificate is in use).
.PP
Certificate selection occurs during the handshake; therefore, the value returned
by \fBSSL_get_certificate()\fR during any callback made during the handshake process
will depend on whether that callback is made before or after certificate
selection occurs.
.PP
A specific use for \fBSSL_get_certificate()\fR is inside a callback set via a call to
\&\fBSSL_CTX_set_tlsext_status_cb\fR\|(3). This callback occurs after certificate
selection, where it can be used to examine a server's chosen certificate, for
example for the purpose of identifying a certificate's \s-1OCSP\s0 responder \s-1URL\s0 so
that an \s-1OCSP\s0 response can be obtained.
.PP
\&\fBSSL_get_privatekey()\fR returns a pointer to the \fB\s-1EVP_PKEY\s0\fR object corresponding
to the certificate returned by \fBSSL_get_certificate()\fR, if any.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
These functions return pointers to their respective objects, or \s-1NULL\s0 if no such
object is available. Returned objects are owned by the \s-1SSL\s0 object and should not
be freed by users of these functions.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(7), \fBSSL_CTX_set_tlsext_status_cb\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2001\-2022 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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>.