C 1320 and designed by Ronald Rivest, first published in 1990. This implementation is only available with the legacy provider.</p>

<dl>

<dt id="EVP_md4">EVP_md4()</dt>
<dd>

<p>The MD4 algorithm which produces a 128-bit output from a given input.</p>

</dd>
</dl>

<h1 id="NOTES">NOTES</h1>

<p>Developers should be aware of the negative performance implications of calling this function multiple times and should consider using <a href="../man3/EVP_MD_fetch.html">EVP_MD_fetch(3)</a> with <a href="../man7/EVP