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Reply to topic   Topic: When/where does the SSL session created?

Joined: 18 Aug 2016
Posts: 3
Location: Quebec

PostPosted: Mon 22 Aug '16 19:50    Post subject: When/where does the SSL session created? Reply with quote

Hi guys,

I'm trying to store some variables into the SSL session cache, but i can't seems to pinpoint when/where the SSL session cache is generated.

I think I was able to store the data into the cache, but when i pull the value out, they are different...

I've added this custom struct in the ssl_private.h:

typedef struct test_data_st {
    int a;
    int b;

static int test_sess_data_idx = -1;

I'm not entirely sure where to save the data yet, but currently I'm doing it in the ssl_hook_Fixup:

        if (test_sess_data_idx == -1)
            test_sess_data_idx = SSL_SESSION_get_ex_new_index(0, "MY DATA", NULL, NULL, NULL);

        SSL_SESSION *sess = (SSL_session_reused(ssl) ? SSL_get_session(ssl) : NULL);
        if (sess)
            TEST_SESSION_DATA * td = NULL;
            td = (TEST_SESSION_DATA *) SSL_SESSION_get_ex_data(sess, test_sess_data_idx);
            int valid = 0;
            if (td == 0)
                TEST_SESSION_DATA d;
                d.a = 1;
                d.b = 1;
                SSL_SESSION_set_ex_data(sess, test_sess_data_idx, &d);
                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "a: %d", td->a);
                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "b: %d", td->b);

The values I'm getting back are like:
[Fri Aug 19 06:26:32 2016] [info] a: 1569085104
[Fri Aug 19 06:26:32 2016] [info] b: 32767

Anyone know at which step is the SSL session cache created?

edit: apache 2.2
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Joined: 18 Jan 2014
Posts: 196
Location: USSA

PostPosted: Wed 07 Sep '16 21:33    Post subject: Reply with quote

The SSL sessions are not cached unless you have installed and configured a session caching module such as mod_socahce_memcache. Then depending on the type of caching module the location of the cahce will differ and it can be a file, a memory location or an external store.
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