</pre>
<p class="level0"><a name="AVAILABILITY"></a><h2 class="nroffsh">AVAILABILITY</h2>
-<p class="level0">Added in 7.39.0 for OpenSSL, GnuTLS and GSKit. Added in 7.43.0 for NSS and wolfSSL/CyaSSL. Added for mbedtls in 7.47.0, sha256 support added in 7.44.0 for OpenSSL, GnuTLS, NSS and wolfSSL/CyaSSL. Other SSL backends not supported. <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
+<p class="level0">PEM/DER support: 7.39.0: OpenSSL, GnuTLS and GSKit 7.43.0: NSS and wolfSSL/CyaSSL 7.47.0: mbedtls 7.49.0: PolarSSL sha256 support: 7.44.0: OpenSSL, GnuTLS, NSS and wolfSSL/CyaSSL. 7.47.0: mbedtls 7.49.0: PolarSSL Other SSL backends not supported. <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
<p class="level0">Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
<p class="level0"><a Class="manpage" href="./CURLOPT_SSL_VERIFYPEER.html">CURLOPT_SSL_VERIFYPEER</a>, <a Class="manpage" href="./CURLOPT_SSL_VERIFYHOST.html">CURLOPT_SSL_VERIFYHOST</a>, <a Class="manpage" href="./CURLOPT_CAINFO.html">CURLOPT_CAINFO</a>, <a Class="manpage" href="./CURLOPT_CAPATH.html">CURLOPT_CAPATH</a><p class="roffit">
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