Cryptography and SSL/TLS Toolkit



SSL_set_session - set a TLS/SSL session to be used during TLS/SSL connect


 #include <openssl/ssl.h>

 int SSL_set_session(SSL *ssl, SSL_SESSION *session);


SSL_set_session() sets session to be used when the TLS/SSL connection is to be established. SSL_set_session() is only useful for TLS/SSL clients. When the session is set, the reference count of session is incremented by 1. If the session is not reused, the reference count is decremented again during SSL_connect(). Whether the session was reused can be queried with the SSL_session_reused call.

If there is already a session set inside ssl (because it was set with SSL_set_session() before or because the same ssl was already used for a connection), SSL_SESSION_free() will be called for that session. If that old session is still open, it is considered bad and will be removed from the session cache (if used). A session is considered open, if SSL_shutdown was not called for the connection (or at least SSL_set_shutdown was used to set the SSL_SENT_SHUTDOWN state).


SSL_SESSION objects keep internal link information about the session cache list, when being inserted into one SSL_CTX object's session cache. One SSL_SESSION object, regardless of its reference count, must therefore only be used with one SSL_CTX object (and the SSL objects created from this SSL_CTX object).


The following return values can occur:


The operation failed; check the error stack to find out the reason.


The operation succeeded.


ssl, SSL_SESSION_free, SSL_get_session, SSL_session_reused, SSL_CTX_set_session_cache_mode

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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