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SSL_get_peer_certificate(3) OpenSSL SSL_get_peer_certificate(3)
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)
0.9.8 2009-04-03 SSL_get_peer_certificate(3)
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