1SSL_CTX_ADD_SESSION(3)              OpenSSL             SSL_CTX_ADD_SESSION(3)
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NAME

6       SSL_CTX_add_session, SSL_CTX_remove_session - manipulate session cache
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SYNOPSIS

9        #include <openssl/ssl.h>
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11        int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);
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13        int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
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DESCRIPTION

16       SSL_CTX_add_session() adds the session c to the context ctx. The
17       reference count for session c is incremented by 1. If a session with
18       the same session id already exists, the old session is removed by
19       calling SSL_SESSION_free(3).
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21       SSL_CTX_remove_session() removes the session c from the context ctx and
22       marks it as non-resumable. SSL_SESSION_free(3) is called once for c.
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NOTES

25       When adding a new session to the internal session cache, it is examined
26       whether a session with the same session id already exists. In this case
27       it is assumed that both sessions are identical. If the same session is
28       stored in a different SSL_SESSION object, The old session is removed
29       and replaced by the new session. If the session is actually identical
30       (the SSL_SESSION object is identical), SSL_CTX_add_session() is a no-
31       op, and the return value is 0.
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33       If a server SSL_CTX is configured with the
34       SSL_SESS_CACHE_NO_INTERNAL_STORE flag then the internal cache will not
35       be populated automatically by new sessions negotiated by the SSL/TLS
36       implementation, even though the internal cache will be searched
37       automatically for session-resume requests (the latter can be suppressed
38       by SSL_SESS_CACHE_NO_INTERNAL_LOOKUP). So the application can use
39       SSL_CTX_add_session() directly to have full control over the sessions
40       that can be resumed if desired.
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RETURN VALUES

43       The following values are returned by all functions:
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45       0   The operation failed. In case of the add operation, it was tried to
46           add the same (identical) session twice. In case of the remove
47           operation, the session was not found in the cache.
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49       1   The operation succeeded.
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SEE ALSO

52       ssl(7), SSL_CTX_set_session_cache_mode(3), SSL_SESSION_free(3)
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55       Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
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57       Licensed under the OpenSSL license (the "License").  You may not use
58       this file except in compliance with the License.  You can obtain a copy
59       in the file LICENSE in the source distribution or at
60       <https://www.openssl.org/source/license.html>.
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641.1.1q                            2023-07-20            SSL_CTX_ADD_SESSION(3)
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