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SSL_get_peer_cert_chain(3) OpenSSL SSL_get_peer_cert_chain(3) NAME SSL_get_peer_cert_chain - get the X509 certificate chain of the peer LIBRARY libcrypto, -lcrypto SYNOPSIS #include <openssl/ssl.h> STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *ssl); DESCRIPTION SSL_get_peer_cert_chain() returns a pointer to STACK_OF(X509) certificates forming the certificate chain of the peer. If called on the client side, the stack also contains the peer's certificate; if called on the server side, the peer's certificate must be obtained separately using SSL_get_peer_certificate(3). If the peer did not present a certificate, NULL is returned. NOTES The peer certificate chain is not necessarily available after reusing a session, in which case a NULL pointer is returned. The reference count of the STACK_OF(X509) object is not incremented. If the corresponding session is freed, the pointer must not be used any longer. RETURN VALUES The following return values can occur: NULL No certificate was presented by the peer or no connection was established or the certificate chain is no longer available when a session is reused. Pointer to a STACK_OF(X509) The return value points to the certificate chain presented by the peer. SEE ALSO ssl(3), SSL_get_peer_certificate(3) 1.0.1u 2014-06-05 SSL_get_peer_cert_chain(3)