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<h1 id="NAME">NAME</h1>

<p>OSSL_CALLBACK, OSSL_PASSPHRASE_CALLBACK - OpenSSL Core type to define callbacks</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code> #include &lt;openssl/core.h&gt;
 typedef int (OSSL_CALLBACK)(const OSSL_PARAM params[], void *arg);
 typedef int (OSSL_PASSPHRASE_CALLBACK)(char *pass, size_t pass_size,
                                        size_t *pass_len,
                