SSL_get_session - retrieve TLS/SSL session data


SYNOPSIS

        #include <openssl/ssl.h>

        SSL_SESSION *SSL_get_session(SSL *ssl);
        SSL_SESSION *SSL_get0_session(SSL *ssl);
        SSL_SESSION *SSL_get1_session(SSL *ssl);


DESCRIPTION

       SSL_get_session() returns a pointer to the SSL_SESSION
       actually used in ssl. The reference count of the
       SSL_SESSION is not incremented, so that the pointer can
       become invalid by other operations.

       SSL_get0_session() is the same as SSL_get_session().

       SSL_get1_session() is the same as SSL_get_session(), but
       the reference count of the SSL_SESSION is incremented by
       one.


NOTES

       The ssl session contains all information required to re-
       establish the connection without a new handshake.

       SSL_get0_session() returns a pointer to the actual
       session. As the reference counter is not incremented, the
       pointer is only valid while the connection is in use. If
       SSL_clear(3) or SSL_free(3) is called, the session may be
       removed completely (if considered bad), and the pointer
       obtained will become invalid. Even if the session is
       valid, it can be removed at any time due to timeout during
       SSL_CTX_flush_sessions(3).

       If the data is to be kept, SSL_get1_session() will
       increment the reference count and the session will stay in
       memory until explicitly freed with SSL_SESSION_free(3),
       regardless of its state.


RETURN VALUES

       The following return values can occur:

       NULL
           There is no session available in ssl.

       Pointer to an SSL
           The return value points to the data of an SSL session.


SEE ALSO

       ssl(3), SSL_free(3), SSL_clear(3), SSL_SESSION_free(3)



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