de></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>Several OpenSSL structures can have application-specific data attached to them, known as &quot;exdata.&quot; The specific structures are:</p>

<pre><code>    APP
    BIO
    DH
    DRBG
    DSA
    EC_KEY
    ENGINE
    RSA
    SSL
    SSL_CTX
    SSL_SESSION
    UI
    UI_METHOD
    X509
    X509_STORE
    X509_STORE_CTX</code></pre>

<p>Each is identified by an <b>CRYPTO_EX_INDEX_xxx</b> define in the <b>crypto.h</b> header file. In addition, <b>CRYPTO_