SSL_get_peer_certificate(3) OpenSSL 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);
DESCRIPTIONSSL_get_peer_certificate() returns a pointer to the X509
certificate the peer presented. If the peer did not
present a certificate, 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_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().
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 ALSOssl(3), SSL_get_verify_result(3), SSL_CTX_set_verify(3)13/Sep/2001 0.9.6j SSL_get_peer_certificate(3)
