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.
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 ALSO¶
ssl(3),
SSL_get_verify_result(3),
SSL_CTX_set_verify(3)