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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">(Top-posting because Outlook still can't handle HTML email correctly.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Unless I'm missing something, you're using the OpenSSL functions correctly - though I admit I just looked at them here and didn't check the documentation or
my own use of them. Perhaps you're not using C correctly.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We can't tell what the storage class of "b" is, because we don't have context. Is it static or automatic? If it's automatic, then as soon as it goes out of
scope, bang - the pointer you've stored is invalid.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The pointer you store should be to an object of static or dynamic storage class. Static doesn't generally make sense, unless your sessions need to be associated
with one of a handful of objects that don't change after creation. More typically you'd use a dynamic object. For example:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> static const BLAH blah0 = {0};<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> BLAH *bp = malloc(sizeof *bp);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> if (! bp) { error handling }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> *bp = blah0;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> bp->b = 12345;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> ...<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> SSL_SESSION_set_ex_data(session, my_data_idx, bp);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you're using C++, of course, you'd want to create an object instance using operator new, rather than calling malloc. But the principle remains the same -
don't use a pointer to an object which will be invalidated when it goes out of scope.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:black">Michael Wojcik</span><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
<br>
</span><span style="font-size:9.0pt;font-family:"Courier New";color:black">Distinguished Engineer, Micro Focus</span><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> openssl-users [mailto:openssl-users-bounces@openssl.org]
<b>On Behalf Of </b>Eric To<br>
<b>Sent:</b> Wednesday, August 24, 2016 15:50<br>
<b>To:</b> openssl-users@openssl.org<br>
<b>Subject:</b> [openssl-users] Example on SSL_SESSION_set_ex_data?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Can someone give an example on how to use the SSL_SESSION_set_ex_data?<o:p></o:p></p>
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<p class="MsoNormal">I'm trying to set custom information in apache mod_ssl and after trying many different ways, but can't get it to stick...<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">struct st_blah_t {<o:p></o:p></p>
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<p class="MsoNormal"> int blah;<o:p></o:p></p>
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<p class="MsoNormal">} BLAH;<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">my_data_idx = SSL_SESSION_get_ex_new_index(0, "BLAH", NULL, NULL, NULL);<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">BLAH b;<o:p></o:p></p>
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<p class="MsoNormal">b.blah = 12345;<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">SSL_SESSION *session = SSL_get_session(ssl);<o:p></o:p></p>
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<p class="MsoNormal">SSL_SESSION_set_ex_data(session, my_data_idx, &b);<o:p></o:p></p>
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<p class="MsoNormal">SSL_set_session(ssl, sess);<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Am I using the functions right?<o:p></o:p></p>
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<p align="center" style="text-align:center"><span style="background:white"><o:p> </o:p></span></p>
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