s_a() returns 1 for true and 0 for false.</p>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man3/EVP_PKEY_new.html">EVP_PKEY_new(3)</a></p>

<h1 id="HISTORY">HISTORY</h1>

<p>The EVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() and EVP_PKEY_CTX_free() functions were added in OpenSSL 1.0.0.</p>

<p>The EVP_PKEY_CTX_new_from_name() and EVP_PKEY_CTX_new_from_pkey() functions were added in OpenSSL 3.0.</p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Copyright 2006-2021 The OpenSSL Project Authors. Al