Updated: 2025/Nov/16

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SSL_SESSION_get_time(3)             OpenSSL            SSL_SESSION_get_time(3)


NAME
       SSL_SESSION_get_time, SSL_SESSION_set_time, SSL_SESSION_get_timeout,
       SSL_SESSION_set_timeout, SSL_SESSION_get_time_ex,
       SSL_SESSION_set_time_ex, SSL_get_time, SSL_set_time, SSL_get_timeout,
       SSL_set_timeout - retrieve and manipulate session time and timeout
       settings

SYNOPSIS
        #include <openssl/ssl.h>

        long SSL_SESSION_get_timeout(const SSL_SESSION *s);
        long SSL_SESSION_set_timeout(SSL_SESSION *s, long tm);

        long SSL_get_timeout(const SSL_SESSION *s);
        long SSL_set_timeout(SSL_SESSION *s, long tm);

        time_t SSL_SESSION_get_time_ex(const SSL_SESSION *s);
        time_t SSL_SESSION_set_time_ex(SSL_SESSION *s, time_t tm);

       The following functions have been deprecated since OpenSSL 3.4, and can
       be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
       version value, see openssl_user_macros(7):

        long SSL_SESSION_get_time(const SSL_SESSION *s);
        long SSL_SESSION_set_time(SSL_SESSION *s, long tm);
        long SSL_get_time(const SSL_SESSION *s);
        long SSL_set_time(SSL_SESSION *s, long tm);

DESCRIPTION
       SSL_SESSION_get_time_ex() returns the time at which the session s was
       established. The time is given in seconds since the Epoch and therefore
       compatible to the time delivered by the time() call.

       SSL_SESSION_set_time_ex() replaces the creation time of the session s
       with the chosen value tm.

       SSL_SESSION_get_timeout() returns the timeout value set for session s
       in seconds.

       SSL_SESSION_set_timeout() sets the timeout value for session s in
       seconds to tm.

       SSL_SESSION_get_time() and SSL_SESSION_set_time() functions use the
       long datatype instead of time_t and are therefore deprecated due to not
       being Y2038-safe on 32 bit systems. Note that such systems still need
       to be configured to use 64 bit time_t to be able to avoid overflow in
       system time.

       The SSL_get_time(), SSL_set_time(), SSL_get_timeout(), and
       SSL_set_timeout() functions are synonyms for the SSL_SESSION_*()
       counterparts.

NOTES
       Sessions are expired by examining the creation time and the timeout
       value.  Both are set at creation time of the session to the actual time
       and the default timeout value at creation, respectively, as set by
       SSL_CTX_set_timeout(3).  Using these functions it is possible to extend
       or shorten the lifetime of the session.

RETURN VALUES
       SSL_SESSION_get_time_ex() and SSL_SESSION_get_timeout() return the
       currently valid values.

       SSL_SESSION_set_time_ex() returns time on success.

       SSL_SESSION_set_timeout() returns 1 on success.

       If any of the function is passed the NULL pointer for the session s, 0
       is returned.

BUGS
       The data type long is typically 32 bits on many systems, hence the old
       functions SSL_SESSION_get_time() and SSL_SESSION_set_time() are not
       always Y2038 safe.

SEE ALSO
       ssl(7), SSL_CTX_set_timeout(3), SSL_get_default_timeout(3)

HISTORY
       The functions SSL_SESSION_get_time_ex() and SSL_SESSION_set_time_ex()
       were added in OpenSSL 3.3.

COPYRIGHT
       Copyright 2001-2024 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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
       <https://www.openssl.org/source/license.html>.

3.5.1                             2025-07-01           SSL_SESSION_get_time(3)