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2024-02-23
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Renamed and modified tls.htm [96f50e582d] to doc/tls.html [24b93a3706]. 

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<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>

<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="Copyright" content="1999 Matt Newman / 2004 Starfish Systems">
<title>TLS (SSL) Tcl Commands</title>
</head>

<body bgcolor="#FFFFFF">

<dl>
    <dd><a href="#NAME">NAME</a> <dl>
            <dd><strong>tls</strong> - binding to <strong>OpenSSL</strong>
                toolkit.</dd>
        </dl>
    </dd>
    <dd><a href="#SYNOPSIS">SYNOPSIS</a> </dd>
    <dd><dl>
            <dd><b>package require Tcl </b><em>?8.4?</em></dd>
            <dd><b>package require tls </b><em>?@@VERS@@?</em></dd>
            <dt>&nbsp;</dt>
            <dd><b>tls::init </b><i>?options?</i> </dd>
            <dd><b>tls::socket </b><em>?options? host port</em></dd>
            <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::import</b><em> channel ?options?</em></dd>
            <dd><b>tls::unimport</b><em> channel</em></dd>
            <dd><b>tls::ciphers </b><em>protocol ?verbose?</em></dd>
            <dd><b>tls::version</b></dd>
        </dl>

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<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=utf-8">
<meta name="Copyright" content="1999 Matt Newman / 2004 Starfish Systems">
<title>TLS (SSL) Tcl Commands</title>
</head>

<body bgcolor="#FFFFFF">

<dl>
    <dd><a href="#NAME">NAME</a>
    <dl>
    <dd><b>tls</b> - binding to <b>OpenSSL</b> toolkit.</dd>
        </dl>
    </dd>
    <dd><a href="#SYNOPSIS">SYNOPSIS</a> </dd>
    <dd><dl>
	    <dd><b>package require Tcl</b> <em>?<b>8.5</b>?</em></dd>
            <dd><b>package require tls </b><em>?@@VERS@@?</em></dd>
            <dt>&nbsp;</dt>
	    <dd><b>tls::init</b> <em>?options?</em> </dd>
            <dd><b>tls::socket </b><em>?options? host port</em></dd>

	    <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::import</b><em> channel ?options?</em></dd>
            <dd><b>tls::unimport</b><em> channel</em></dd>
            <dd><b>tls::ciphers </b><em>protocol ?verbose?</em></dd>
            <dd><b>tls::version</b></dd>
        </dl>
︙︙
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<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 @@VERS@@</b><br>
<br>
<a href="#tls::init"><b>tls::init </b><i>?options?</i><br>
</a><a href="#tls::socket"><b>tls::socket </b><em>?options? host
port</em><br>
<b>tls::socket</b><em> ?-server command? ?options? port</em><br>
</a><a href="#tls::status"><b>tls::status </b><em>?-local? channel</em><br>








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<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 @@VERS@@</b><br>
<br>
<a href="#tls::init"><b>tls::init </b><i>?options?</i><br>
</a><a href="#tls::socket"><b>tls::socket </b><em>?options? host
port</em><br>
<b>tls::socket</b><em> ?-server command? ?options? port</em><br>
</a><a href="#tls::status"><b>tls::status </b><em>?-local? channel</em><br>
︙︙
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        command except that the options can include any of the
        applicable <a href="#tls::import"><strong>tls:import</strong></a>
        options with one additional option:
<blockquote>
    <dl>
        <dt><strong>-autoservername</strong> <em>bool</em></dt>
        <dd>Automatically send the -servername as the <em>host</em> argument
            (<strong>default</strong>: <em>false</em>)</dd>
    </dl>
</blockquote>
    <dt>&nbsp;</dt>
    <dt><a name="tls::handshake"><strong>tls::handshake</strong> <em>channel</em></a></dt>
    <dd>Forces handshake to take place, and returns 0 if
        handshake is still in progress (non-blocking), or 1 if
        the handshake was successful. If the handshake failed








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        command except that the options can include any of the
        applicable <a href="#tls::import"><strong>tls:import</strong></a>
        options with one additional option:
<blockquote>
    <dl>
        <dt><strong>-autoservername</strong> <em>bool</em></dt>
        <dd>Automatically send the -servername as the <em>host</em> argument
	    (default is  <em>false</em>)</dd>
    </dl>
</blockquote>
    <dt>&nbsp;</dt>
    <dt><a name="tls::handshake"><strong>tls::handshake</strong> <em>channel</em></a></dt>
    <dd>Forces handshake to take place, and returns 0 if
        handshake is still in progress (non-blocking), or 1 if
        the handshake was successful. If the handshake failed
︙︙
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            default validation provided by OpenSSL.
            <br>
            See <a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a> for
            further discussion.</dd>
        <dt><strong>-dhparams </strong><em>filename</em></dt>
        <dd>Provide a Diffie-Hellman parameters file.</dd>
        <dt><strong>-keyfile</strong> <em>filename</em></dt>
        <dd>Provide the private key file. (<strong>default</strong>:
            value of -certfile)</dd>
        <dt><strong>-key</strong> <em>filename</em></dt>
        <dd>Provide the private key to use as a DER encoded value (PKCS#1 DER)</dd>
        <dt><strong>-model</strong> <em>channel</em></dt>
        <dd>This will force this channel to share the same <em><strong>SSL_CTX</strong></em>
            structure as the specified <em>channel</em>, and
            therefore share callbacks etc.</dd>
        <dt><strong>-password</strong> <em>callback</em></dt>
        <dd>If supplied, this callback will be invoked when OpenSSL needs
            to obtain a password, typically to unlock the private key of
	    a certificate.
            The callback should return a string which represents the
            password to be used.
            <br>
            See <a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a> for
            further discussion.</dd>
        <dt><strong>-request </strong><em>bool</em></dt>
        <dd>Request a certificate from peer during SSL handshake.
            (<strong>default</strong>: <em>true</em>)</dd>
        <dt><strong>-require</strong> <em>bool</em></dt>
        <dd>Require a valid certificate from peer during SSL
            handshake. If this is set to true then <strong>-request</strong>
            must also be set to true. (<strong>default</strong>: <em>false</em>)</dd>
        <dt><strong>-server</strong> <em>bool</em></dt>
        <dd>Handshake as server if true, else handshake as
            client.(<strong>default</strong>: <em>false</em>)</dd>
        <dt><strong>-servername</strong> <em>host</em></dt>
        <dd>Only available if the OpenSSL library the package is linked
	    against supports the TLS hostname extension for 'Server Name
	    Indication' (SNI). Use to name the logical host we are talking
	    to and expecting a certificate for</dd>
        <dt><strong>-ssl2</strong> <em>bool</em></dt>
        <dd>Enable use of SSL v2. (<strong>default</strong>: <em>false</em>)</dd>
        <dt><strong>-ssl3 </strong><em>bool</em></dt>
        <dd>Enable use of SSL v3. (<strong>default</strong>: <em>false</em>)</dd>
        <dt>-<strong>tls1</strong> <em>bool</em></dt>
        <dd>Enable use of TLS v1. (<strong>default</strong>: <em>true</em>)</dd>
        <dt>-<strong>tls1.1</strong> <em>bool</em></dt>
        <dd>Enable use of TLS v1.1 (<strong>default</strong>: <em>true</em>)</dd>
        <dt>-<strong>tls1.2</strong> <em>bool</em></dt>
        <dd>Enable use of TLS v1.2 (<strong>default</strong>: <em>true</em>)</dd>
        <dt>-<strong>tls1.3</strong> <em>bool</em></dt>
        <dd>Enable use of TLS v1.3 (<strong>default</strong>: <em>true</em>)</dd>
    </dl>
</blockquote>

<dl>
    <dt><a name="tls::unimport"><b>tls::unimport </b><i>channel</i></a></dt>
    <dd>Provided for symmetry to <strong>tls::import</strong>, this
      unstacks the SSL-enabling of a regular Tcl channel.  An error








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            default validation provided by OpenSSL.
            <br>
            See <a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a> for
            further discussion.</dd>
        <dt><strong>-dhparams </strong><em>filename</em></dt>
        <dd>Provide a Diffie-Hellman parameters file.</dd>
        <dt><strong>-keyfile</strong> <em>filename</em></dt>
	<dd>Provide the private key file. (default is
            value of -certfile)</dd>
        <dt><strong>-key</strong> <em>filename</em></dt>
        <dd>Provide the private key to use as a DER encoded value (PKCS#1 DER)</dd>
        <dt><strong>-model</strong> <em>channel</em></dt>
        <dd>This will force this channel to share the same <em><strong>SSL_CTX</strong></em>
            structure as the specified <em>channel</em>, and
            therefore share callbacks etc.</dd>
        <dt><strong>-password</strong> <em>callback</em></dt>
        <dd>If supplied, this callback will be invoked when OpenSSL needs
            to obtain a password, typically to unlock the private key of
	    a certificate.
            The callback should return a string which represents the
            password to be used.
            <br>
            See <a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a> for
            further discussion.</dd>
        <dt><strong>-request </strong><em>bool</em></dt>
        <dd>Request a certificate from peer during SSL handshake.
	    (default is  <em>true</em>)</dd>
        <dt><strong>-require</strong> <em>bool</em></dt>
        <dd>Require a valid certificate from peer during SSL
            handshake. If this is set to true then <strong>-request</strong>
	    must also be set to true. (default is  <em>false</em>)</dd>
        <dt><strong>-server</strong> <em>bool</em></dt>
        <dd>Handshake as server if true, else handshake as
	    client.(default is  <em>false</em>)</dd>
        <dt><strong>-servername</strong> <em>host</em></dt>
        <dd>Only available if the OpenSSL library the package is linked
	    against supports the TLS hostname extension for 'Server Name
	    Indication' (SNI). Use to name the logical host we are talking
	    to and expecting a certificate for</dd>
        <dt><strong>-ssl2</strong> <em>bool</em></dt>
	<dd>Enable use of SSL v2. (default is <em>false</em>)</dd>
        <dt><strong>-ssl3 </strong><em>bool</em></dt>
	<dd>Enable use of SSL v3. (default is <em>false</em>)</dd>
        <dt>-<strong>tls1</strong> <em>bool</em></dt>
	<dd>Enable use of TLS v1. (default is <em>true</em>)</dd>
        <dt>-<strong>tls1.1</strong> <em>bool</em></dt>
	<dd>Enable use of TLS v1.1 (default is <em>true</em>)</dd>
        <dt>-<strong>tls1.2</strong> <em>bool</em></dt>
	<dd>Enable use of TLS v1.2 (default is <em>true</em>)</dd>
        <dt>-<strong>tls1.3</strong> <em>bool</em></dt>
	<dd>Enable use of TLS v1.3 (default is <em>true</em>)</dd>
    </dl>
</blockquote>

<dl>
    <dt><a name="tls::unimport"><b>tls::unimport </b><i>channel</i></a></dt>
    <dd>Provided for symmetry to <strong>tls::import</strong>, this
      unstacks the SSL-enabling of a regular Tcl channel.  An error
︙︙
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<pre><code>
package require http
package require tls

http::register https 443 [list ::tls::socket -autoservername true -require true -cadir /etc/ssl/certs]

set tok [http::geturl https://www.tcl.tk/]
</code></pre>

<h3><a name="SPECIAL CONSIDERATIONS">SPECIAL CONSIDERATIONS</a></h3>

<p>The capabilities of this package can vary enormously based
upon how your OpenSSL library was configured and built. At the
most macro-level OpenSSL supports a &quot;no patents&quot; build,
which disables RSA, IDEA, RC(2,4,5) and SSL2 - if your OpenSSL is
configured this way then you will need to build TLS with the
-DNO_PATENTS option - and the resultant module will function
correctly and also support ADH certificate-less encryption,
however you will be unable to utilize this to speak to normal Web
Servers, which typically require RSA support. Please see <a
href="http://www.openssl.org/">http://www.openssl.org/</a> for
more information on the whole issue of patents and US export
restrictions. </p>

<h3><a name="SEE ALSO">SEE ALSO</a></h3>

<p><strong>socket</strong>, <strong>fileevent, </strong><a
href="http://www.openssl.org/"><strong>OpenSSL</strong></a></p>

<hr>

<pre>
Copyright &copy; 1999 Matt Newman.
Copyright &copy; 2004 Starfish Systems.
</pre>
</body>
</html>








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<pre><code>
package require http
package require tls

http::register https 443 [list ::tls::socket -autoservername true -require true -cadir /etc/ssl/certs]

set tok [http::geturl https://core.tcl-lang.org/]
</code></pre>

<h3><a name="SPECIAL CONSIDERATIONS">SPECIAL CONSIDERATIONS</a></h3>

<p>The capabilities of this package can vary enormously based
upon how your OpenSSL library was configured and built. At the
most macro-level OpenSSL supports a &quot;no patents&quot; build,
which disables RSA, IDEA, RC(2,4,5) and SSL2 - if your OpenSSL is
configured this way then you will need to build TLS with the
-DNO_PATENTS option - and the resultant module will function
correctly and also support ADH certificate-less encryption,
however you will be unable to utilize this to speak to normal Web
Servers, which typically require RSA support. Please see <a
href="http://www.openssl.org/">http://www.openssl.org/</a> for
more information on the whole issue of patents and US export
restrictions. </p>

<h3><a name="SEE ALSO">SEE ALSO</a></h3>

<p><strong>socket</strong>, <strong>fileevent</strong>, <a
href="http://www.openssl.org/"><strong>OpenSSL</strong></a></p>

<hr>

<pre>
Copyright &copy; 1999 Matt Newman.
Copyright &copy; 2004 Starfish Systems.
</pre>
</body>
</html>

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