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SSL_CTX_add_session(3) OpenSSL SSL_CTX_add_session(3)
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SSL_CTX_add_session, SSL_CTX_remove_session - manipulate session cache
int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);
int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
SSL_CTX_add_session() adds the session c to the context ctx. The
reference count for session c is incremented by 1. If a session with
the same session id already exists, the old session is removed by
SSL_CTX_remove_session() removes the session c from the context ctx and
marks it as non-resumable. SSL_SESSION_free(3) is called once for c.
When adding a new session to the internal session cache, it is examined
whether a session with the same session id already exists. In this case
it is assumed that both sessions are identical. If the same session is
stored in a different SSL_SESSION object, The old session is removed
and replaced by the new session. If the session is actually identical
(the SSL_SESSION object is identical), SSL_CTX_add_session() is a no-
op, and the return value is 0.
If a server SSL_CTX is configured with the
SSL_SESS_CACHE_NO_INTERNAL_STORE flag then the internal cache will not
be populated automatically by new sessions negotiated by the SSL/TLS
implementation, even though the internal cache will be searched
automatically for session-resume requests (the latter can be suppressed
by SSL_SESS_CACHE_NO_INTERNAL_LOOKUP). So the application can use
SSL_CTX_add_session() directly to have full control over the sessions
that can be resumed if desired.
The following values are returned by all functions:
0 The operation failed. In case of the add operation, it was tried to
add the same (identical) session twice. In case of the remove
operation, the session was not found in the cache.
1 The operation succeeded.
ssl(7), SSL_CTX_set_session_cache_mode(3), SSL_SESSION_free(3)
Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
1.1.1i 2018-09-23 SSL_CTX_add_session(3)