™.. SSL_CTX_add_session - Online Linux Manual PageSection : 3
Updated : 2017-03-22
Source : 1.0.1e
Note : OpenSSL
NAMESSL_CTX_add_session, SSL_add_session, SSL_CTX_remove_session, SSL_remove_session − manipulate session cache
SYNOPSIS​ #include <openssl/ssl.h> ​ ​ int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c); ​ int SSL_add_session(SSL_CTX *ctx, SSL_SESSION *c); ​ ​ int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c); ​ int SSL_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
DESCRIPTION​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 calling ​SSL_SESSION_free (3). ​SSL_CTX_remove_session() removes the session c from the context ctx. ​SSL_SESSION_free (3) is called once for c. ​SSL_add_session() and SSL_remove_session() are synonyms for their SSL_CTX_*() counterparts.
NOTESWhen 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 surpressed 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.
RETURN VALUESThe 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.
SEE ALSO​ssl (3), ​SSL_CTX_set_session_cache_mode (3), ​SSL_SESSION_free (3) 0
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