SSL_get_peer_certificate - get the X509 certificate of the peer
#include <openssl/ssl.h> X509 *SSL_get_peer_certificate(const SSL *ssl);
OpenSSL SSL_get_peer_certificate(3openssl)
NAME
SSL_get_peer_certificate - get the X509 certificate of the peer
SYNOPSIS
#include <openssl/ssl.h>
X509 *SSL_get_peer_certificate(const SSL *ssl);
DESCRIPTION
SSL_get_peer_certificate() returns a pointer to the X509 certificate
the peer presented. If the peer did not present a certificate, NULL is
returned.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | library/security/openssl |
+---------------+--------------------------+
|Stability | Pass-through uncommitted |
+---------------+--------------------------+
NOTES
Due to the protocol definition, a TLS/SSL server will always send a
certificate, if present. A client will only send a certificate when
explicitly requested to do so by the server (see
SSL_CTX_set_verify(3)). If an anonymous cipher is used, no certificates
are sent.
That a certificate is returned does not indicate information about the
verification state, use SSL_get_verify_result(3) to check the
verification state.
The reference count of the X509 object is incremented by one, so that
it will not be destroyed when the session containing the peer
certificate is freed. The X509 object must be explicitly freed using
X509_free().
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://www.openssl.org/source/openssl-1.0.2ze.tar.gz.
Further information about this software can be found on the open source
community website at https://www.openssl.org/.
RETURN VALUES
The following return values can occur:
NULL
No certificate was presented by the peer or no connection was
established.
Pointer to an X509 certificate
The return value points to the certificate presented by the peer.
SEE ALSO
ssl(3), SSL_get_verify_result(3), SSL_CTX_set_verify(3)
1.0.2ze 2022-05-03
SSL_get_peer_certificate(3openssl)