</b> for equality. It takes an amount of time dependent on <b>len</b>, but independent of the contents of the memory regions pointed to by <b>a</b> and <b>b</b>.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>CRYPTO_memcmp() returns 0 if the memory regions are equal and nonzero otherwise.</p>

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

<p>Unlike memcmp(2), this function cannot be used to order the two memory regions as the return value when they differ is undefined, other than being nonzero.</p>

<h1 id="COPYRIGHT">COP