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<dd><b>tls::socket</b> <em> ?-server command? ?options? port</em></dd>
<dd><b>tls::handshake</b> <em> channel</em></dd>
<dd><b>tls::status </b> <em>?-local? channel</em></dd>
<dd><b>tls::connection </b> <em>channel</em></dd>
<dd><b>tls::import</b> <em>channel ?options?</em></dd>
<dd><b>tls::unimport</b> <em>channel</em></dd>
<dt> </dt>
<dd><b>tls::ciphers </b> <em>protocol ?verbose? ?supported?</em></dd>
<dd><b>tls::protocols</b></dd>
<dd><b>tls::version</b></dd>
</dl>
</dd>
<dd><a href="#COMMANDS">COMMANDS</a></dd>
<dd><a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a></dd>
<dd><a href="#HTTPS EXAMPLE">HTTPS EXAMPLE</a></dd>
<dd><a href="#SEE ALSO">SPECIAL CONSIDERATIONS</a></dd>
<dd><a href="#SEE ALSO">SEE ALSO</a></dd>
</dl>
<hr>
<h3><a name="NAME">NAME</a></h3>
<p><strong>tls</strong> - binding to <strong>OpenSSL</strong>
toolkit.</p>
<h3><a name="SYNOPSIS">SYNOPSIS</a></h3>
<p><b>package require Tcl 8.4</b><br>
<b>package require tls</b><br>
<br>
<a href="#tls::init"><b>tls::init</b> <i>?options?</i></a><br>
<a href="#tls::socket"><b>tls::socket</b> <i>?options? host port</i><br>
<a href="#tls::socket"><b>tls::socket</b> <i>?-server command? ?options? port</i></a><br>
<a href="#tls::status"><b>tls::status</b> <i>?-local? channel</i></a><br>
<a href="#tls::connection"><b>tls::connection</b> <i>channel</i></a><br>
<a href="#tls::handshake"><b>tls::handshake</b> <i>channel</i></a><br>
<a href="#tls::import"><b>tls::import</b> <i>channel ?options?</i></a><br>
<a href="#tls::unimport"><b>tls::unimport</b> <i>channel</i></a><br>
<br>
<a href="#tls::ciphers"><b>tls::ciphers</b> <i>protocol ?verbose? ?supported?</i></a><br>
<a href="#tls::protocols"><b>tls::protocols</b></a>
<a href="#tls::version"><b>tls::version</b></a>
</p>
<h3><a name="DESCRIPTION">DESCRIPTION</a></h3>
<p>This extension provides a generic binding to <a
href="http://www.openssl.org/">OpenSSL</a>, utilizing the
<strong>Tcl_StackChannel</strong>
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<dd><b>tls::socket</b> <em> ?-server command? ?options? port</em></dd>
<dd><b>tls::handshake</b> <em> channel</em></dd>
<dd><b>tls::status </b> <em>?-local? channel</em></dd>
<dd><b>tls::connection </b> <em>channel</em></dd>
<dd><b>tls::import</b> <em>channel ?options?</em></dd>
<dd><b>tls::unimport</b> <em>channel</em></dd>
<dt> </dt>
<dd><b>tls::ciphers</b> <em>?protocol? ?verbose? ?supported?</em></dd>
<dd><b>tls::protocols</b></dd>
<dd><b>tls::version</b></dd>
<dt> </dt>
<dd><b>tls::hash</b> <em>type data</em></dd>
<dd><b>tls::hashes</b></dd>
<dd><b>tls::md4</b> <em>data</em></dd>
<dd><b>tls::md5</b> <em>data</em></dd>
<dd><b>tls::sha1</b> <em>data</em></dd>
<dd><b>tls::sha256</b> <em>data</em></dd>
</dl>
</dd>
<dd><a href="#COMMANDS">COMMANDS</a></dd>
<dd><a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a></dd>
<dd><a href="#HTTPS EXAMPLE">HTTPS EXAMPLE</a></dd>
<dd><a href="#SEE ALSO">SPECIAL CONSIDERATIONS</a></dd>
<dd><a href="#SEE ALSO">SEE ALSO</a></dd>
</dl>
<hr>
<h3><a name="NAME">NAME</a></h3>
<p><strong>tls</strong> - binding to <strong>OpenSSL</strong>
toolkit.</p>
<h3><a name="SYNOPSIS">SYNOPSIS</a></h3>
<p><b>package require Tcl 8.5</b><br>
<b>package require tls</b><br>
<br>
<a href="#tls::init"><b>tls::init</b> <i>?options?</i></a><br>
<a href="#tls::socket"><b>tls::socket</b> <i>?options? host port</i><br>
<a href="#tls::socket"><b>tls::socket</b> <i>?-server command? ?options? port</i></a><br>
<a href="#tls::status"><b>tls::status</b> <i>?-local? channel</i></a><br>
<a href="#tls::connection"><b>tls::connection</b> <i>channel</i></a><br>
<a href="#tls::handshake"><b>tls::handshake</b> <i>channel</i></a><br>
<a href="#tls::import"><b>tls::import</b> <i>channel ?options?</i></a><br>
<a href="#tls::unimport"><b>tls::unimport</b> <i>channel</i></a><br>
<br>
<a href="#tls::ciphers"><b>tls::ciphers</b> <i>?protocol? ?verbose? ?supported?</i></a><br>
<a href="#tls::protocols"><b>tls::protocols</b></a><br>
<a href="#tls::version"><b>tls::version</b></a><br>
<br>
<a href="#tls::hash"><b>tls::hash</b> <i>type data</i></a><br>
<a href="#tls::hashes"><b>tls::hashes</b></a><br>
<a href="#tls::md4"><b>tls::md4</b> <i>data</i></a><br>
<a href="#tls::md5"><b>tls::md5</b> <i>data</i></a><br>
<a href="#tls::sha1"><b>tls::sha1</b> <i>data</i></a><br>
<a href="#tls::sha256"><b>tls::sha256</b> <i>data</i></a><br>
</p>
<h3><a name="DESCRIPTION">DESCRIPTION</a></h3>
<p>This extension provides a generic binding to <a
href="http://www.openssl.org/">OpenSSL</a>, utilizing the
<strong>Tcl_StackChannel</strong>
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<dd>Unique session master key.</dd>
<dt><strong>session_cache_mode</strong> <em>mode</em></dt>
<dd>Server cache mode (client, server, or both).</dd>
</dl>
</blockquote>
<dt><a name="tls::ciphers"><strong>tls::ciphers</strong>
<em>protocol ?verbose? ?supported?</em></a></dt>
<dd>Returns a list of supported ciphers available for <em>protocol</em>,
where protocol must be one of <b>ssl2, ssl3, tls1, tls1.1,
tls1.2,</b> or <b>tls1.3</b>. If <em>verbose</em> is specified as
true then a verbose, human readable list is returned with
additional information on the cipher. If <em>supported</em>
is specified as true, then only the ciphers supported for protocol
will be listed.</dd>
<dt><a name="tls::protocols"><strong>tls::protocols</strong></a></dt>
<dd>Returns a list of supported protocols. Valid values are:
<b>ssl2</b>, <b>ssl3</b>, <b>tls1</b>, <b>tls1.1</b>, <b>tls1.2</b>,
and <b>tls1.3</b>. Exact list depends on OpenSSL version and
compile time flags.</dd>
<dt><a name="tls::version"><strong>tls::version</strong></a></dt>
<dd>Returns the OpenSSL version string.</dd>
</dl>
<h3><a name="CALLBACK OPTIONS">CALLBACK OPTIONS</a></h3>
<p>
As indicated above, individual channels can be given their own callbacks
to handle intermediate processing by the OpenSSL library, using the
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<dd>Unique session master key.</dd>
<dt><strong>session_cache_mode</strong> <em>mode</em></dt>
<dd>Server cache mode (client, server, or both).</dd>
</dl>
</blockquote>
<dt><a name="tls::ciphers"><strong>tls::ciphers</strong>
<em>?protocol? ?verbose? ?supported?</em></a></dt>
<dd>Without any args, returns a list of all ciphers. With
<em>protocol</em>, only the ciphers supportted for that protocol
are returned where <em>protocol</em> must be one of <b>ssl2, ssl3,
tls1, tls1.1, tls1.2,</b> or <b>tls1.3</b>. If <em>verbose</em> is
specified as true then a verbose, human readable list is returned
with additional information on the cipher. If <em>supported</em>
is specified as true, then only the ciphers supported for protocol
will be listed.</dd>
<dt><a name="tls::protocols"><strong>tls::protocols</strong></a></dt>
<dd>Returns a list of supported protocols. Valid values are:
<b>ssl2</b>, <b>ssl3</b>, <b>tls1</b>, <b>tls1.1</b>, <b>tls1.2</b>,
and <b>tls1.3</b>. Exact list depends on OpenSSL version and
compile time flags.</dd>
<dt><a name="tls::version"><strong>tls::version</strong></a></dt>
<dd>Returns the OpenSSL version string.</dd>
<br>
<dt><a name="tls::hash"><strong>tls::hash</strong> <em>type data</em></a></dt>
<dd>Calculate the hash for <em>data</em> using <em>type</em> digest.
Returns value as a hex string. Type cam be any OpenSSL supported
hash digest including: <b>md4</b>, <b>md5</b>, <b>sha1</b>,
sha2 (<b>sha224</b>, <b>sha256</b>, <b>sha384</b>, <b>sha512</b>,
<b>sha512-224</b>, and <b>sha512-256</b>),
sha3 (<b>sha3-224</b>, <b>sha3-256</b>, <b>sha3-384</b>, and <b>sha3-512</b>), etc.</dd>
<dt><a name="tls::hashes"><strong>tls::hashes</strong></a></dt>
<dd>Returns a list of the valid hash digests.</dd>
<dt><a name="tls::md4"><strong>tls::md4</strong> <em>data</em></a></dt>
<dd>Calculate the hash for <em>data</em> using the MD4 message-digest algorithm.</dd>
<dt><a name="tls::md5"><strong>tls::md5</strong> <em>data</em></a></dt>
<dd>Calculate the hash for <em>data</em> using the MD5 message-digest algorithm.</dd>
<dt><a name="tls::sha1"><strong>tls::sha1</strong> <em>data</em></a></dt>
<dd>Calculate the hash for <em>data</em> using the SHA-1 secure hash algorithm.</dd>
<dt><a name="tls::sha256"><strong>tls::sha256</strong> <em>data</em></a></dt>
<dd>Calculate the hash for <em>data</em> using the SHA-2 SHA-256 secure hash algorithm.</dd>
</dl>
<h3><a name="CALLBACK OPTIONS">CALLBACK OPTIONS</a></h3>
<p>
As indicated above, individual channels can be given their own callbacks
to handle intermediate processing by the OpenSSL library, using the
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