SSL_get_peer_certificate(3)SSL_get_peer_certificate(3)NAMESSL_get_peer_certificate - Get the X509 certificate of the peer
SYNOPSIS
#include <openssl/ssl.h>
X509 *SSL_get_peer_certificate(
SSL *ssl );
DESCRIPTION
The SSL_get_peer_certificate() function returns a pointer to the X509
certificate the peer presented. If the peer did not present a certifi‐
cate, NULL is returned.
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_ver‐
ify()). If an anonymous cipher is used, no certificates are sent.
The reference count of the X509 object is incremented by one, so that
it will not be destroyed when the session containing the peer certifi‐
cate is freed. The X509 object must be explicitly freed using the
X509_free() function.
RETURN VALUES
The following return values can occur: No certificate was presented by
the peer or no connection was established. The return value points to
the certificate presented by the peer.
SEE ALSO
Functions: ssl(3), SSL_get_verify_result(3), SSL_CTX_set_verify(3)SSL_get_peer_certificate(3)