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<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN"> 
<!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><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>?8.4?</em></dd>
            <dd><b>package require tls</b></dd>
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    <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
        this routine will throw an error.</dd>
    <dt>&nbsp;</dt>
    <dt><a name="tls::status"><strong>tls::status</strong>
    <em>?-local? channel</em></a></dt>
    <dd>Returns the current certificate status of an SSL channel. The
        result is a list of key-value pairs describing the
        connected peer. If the result is an empty list then the
        SSL handshake has not yet completed.
        If <em>-local</em> is given, then the certificate information
        is the one used locally.</dd>

    <dd>Returns the current status of the certificate for an SSL
	channel. The result is a list of key-value pairs describing
	the certificate. If the result is an empty list then the
        SSL handshake has not yet completed. If <em>-local</em> is
	specified, then the local certificate is used.</dd>
<blockquote>
	<b>SSL Status</b>
    <dl>
        <dt><strong>alpn</strong> <em>protocol</em></dt>
        <dd>The protocol selected after Application-Layer Protocol
	    Negotiation (ALPN).</dd>
        <dt><strong>cipher</strong> <em>cipher</em></dt>
        <dd>The current cipher in use between the client and
            server channels.</dd>
        <dt><strong>peername</strong> <em>name</em></dt>
        <dd>The peername from the certificate.</dd>
        <dt><strong>protocol</strong> <em>version</em></dt>
        <dd>The protocol version used for the connection:
	    SSL2, SSL3, TLS1, TLS1.1, TLS1.2, TLS1.3, or unknown.</dd>
        <dt><strong>sbits</strong> <em>n</em></dt>
        <dd>The number of bits used for the session key.</dd>
        <dt><strong>signatureHashAlgorithm</strong> <em>algorithm</em></dt>
        <dd>The signature hash algorithm.</dd>
        <dt><strong>signature_type</strong> <em>type</em></dt>
        <dd>The signature type value.</dd>
        <dt><strong>verification</strong> <em>result</em></dt>
        <dd>Certificate verification result.</dd>
        <dt><strong>ca_names</strong> <em>list</em></dt>
        <dd>List of the Certificate Authorities used to create the certificate.</dd>
    </dl>
</blockquote>
<blockquote>
	<b>Certificate Status</b>
    <dl>
        <dt><strong>all</strong> <em>string</em></dt>
        <dd>Dump of all certificate data.</dd>
        <dd>Dump of all certificate info.</dd>

        <dt><strong>version</strong> <em>value</em></dt>
        <dd>The certification version</dd>
        <dt><strong>signatureAlgorithm</strong> <em>algorithm</em></dt>
        <dd>The certificate version.</dd>
        <dt><strong>serialNumber</strong> <em>n</em></dt>
        <dd>The serial number of the certificate as hex string.</dd>
        <dt><strong>signature</strong> <em>algorithm</em></dt>
        <dd>Cipher algorithm used for certificate signature.</dd>
        <dt><strong>digest</strong> <em>version</em></dt>
        <dd>Certificate signature digest.</dd>
        <dt><strong>publicKeyAlgorithm</strong> <em>algorithm</em></dt>
        <dd>Certificate signature public key algorithm.</dd>
        <dt><strong>publicKey</strong> <em>string</em></dt>
        <dd>Certificate signature public key.</dd>
        <dt><strong>bits</strong> <em>n</em></dt>
        <dd>Number of bits used for certificate signature key</dd>
        <dt><strong>self_signed</strong> <em>boolean</em></dt>
        <dd>Is certificate signature self signed.</dd>
        <dt><strong>sha1_hash</strong> <em>hash</em></dt>
        <dd>The SHA1 hash of the certificate.</dd>
        <dt><strong>sha256_hash</strong> <em>hash</em></dt>
        <dd>The SHA256 hash of the certificate.</dd>
        <dt><strong>subject</strong> <em>dn</em></dt>
        <dd>The distinguished name (DN) of the certificate subject.</dd>
        <dt><strong>issuer</strong> <em>dn</em></dt>
        <dd>The distinguished name (DN) of the certificate issuer.</dd>
        <dt><strong>notBefore</strong> <em>date</em></dt>
        <dd>The begin date for the validity of the certificate.</dd>
        <dt><strong>notAfter</strong> <em>date</em></dt>
        <dd>The expiry date for the certificate.</dd>
        <dt><strong>serialNumber</strong> <em>n</em></dt>
        <dd>The serial number of the certificate.</dd>
        <dt><strong>certificate</strong> <em>cert</em></dt>
        <dd>The PEM encoded certificate.</dd>
        <dd>The expiration date for the certificate.</dd>
        <dt><strong>subject</strong> <em>dn</em></dt>
        <dd>The distinguished name (DN) of the certificate subject.
	    Fields include: Common Name (CN), Organization (O), Locality
	    or City (L), State or Province (S), and Country Name (C).</dd>

        <dt><strong>num_extensions</strong> <em>n</em></dt>
        <dd>Number of certificate extensions.</dd>
        <dt><strong>extensions</strong> <em>list</em></dt>
        <dd>List of certificate extension names.</dd>
        <dt><strong>peername</strong> <em>name</em></dt>
        <dd>The peername from the certificate.</dd>
        <dt><strong>sbits</strong> <em>n</em></dt>
        <dd>The number of bits used for the session key.</dd>
        <dt><strong>cipher</strong> <em>cipher</em></dt>
        <dd>The current cipher in use between the client and
            server channels.</dd>
        <dt><strong>verification<em>result</em></dt>
        <dd>Certificate verification result.</dd>
        <dt><strong>alpn</strong> <em>protocol</em></dt>
        <dt><strong>subjectKeyIdentifier</strong> <em>string</em></dt>
        <dd>Hash of the public key inside the certificate.</dd>
        <dt><strong>subjectAltName</strong> <em>list</em></dt>
        <dd>List of all of the alternative domain names, sub domains,
	    and IP addresses that are secured by the certificate.</dd>

	<dt><strong>certificate</strong> <em>cert</em></dt>
        <dd>The PEM encoded certificate.</dd>

        <dt><strong>signatureDigest</strong> <em>version</em></dt>
        <dd>Certificate signing digest.</dd>
        <dt><strong>publicKeyAlgorithm</strong> <em>algorithm</em></dt>
        <dd>The protocol selected after Application-Layer Protocol
	    Negotiation (ALPN).</dd>
        <dd>Certificate signature public key algorithm.</dd>
        <dt><strong>protocol</strong> <em>value</em></dt>
        <dd>The protocol version used for the connection:
	  SSLv2, SSLv3, TLSv1, TLSv1.1, TLSv1.2, TLSv1.3, or unknown</dd>
        <dt><strong>signatureHashAlgorithm</strong> <em>string</em></dt>
        <dd>The signature hash algorithm.</dd>
        <dt><strong>signature_type</strong> <em>type</em></dt>
        <dd>The signature type value.</dd>
        <dt><strong>subjectAltName</strong> <em>list</em></dt>
        <dd>List of all of the alternative domain names, sub domains,
	    and IP addresses that are secured by the certificate.</dd>
        <dt><strong>ca_names</strong> <em>list</em></dt>
        <dd>List of the Certificate Authorities used to create the certificate.</dd>
        <dt><strong>publicKey</strong> <em>string</em></dt>
        <dd>Certificate signature public key as hex string.</dd>
        <dt><strong>bits</strong> <em>n</em></dt>
        <dd>Number of bits used for certificate signature key</dd>
        <dt><strong>self_signed</strong> <em>boolean</em></dt>
        <dd>Is certificate signature self signed.</dd>

        <dt><strong>sha1_hash</strong> <em>hash</em></dt>
        <dd>The SHA1 hash of the certificate as hex string.</dd>
        <dt><strong>sha256_hash</strong> <em>hash</em></dt>
        <dd>The SHA256 hash of the certificate as hex string.</dd>
    </dl>
</blockquote>

    <dt><a name="tls::connection"><strong>tls::connection</strong>
    <em>channel</em></a></dt>
    <dd>Returns the current connection status of an SSL channel. The
        result is a list of key-value pairs describing the
        connected peer.</dd>

<blockquote>
	<b>SSL Status</b>
    <dl>
        <dt><strong>state</strong> <em>state</em></dt>
        <dd>State of the connection.</dd>
        <dt><strong>servername</strong> <em>name</em></dt>
        <dd>The name of the connected to server.</dd>
        <dt><strong>protocol</strong> <em>version</em></dt>
        <dd>The protocol version used for the connection:
	    SSL2, SSL3, TLS1, TLS1.1, TLS1.2, TLS1.3, or unknown.</dd>
        <dt><strong>renegotiation</strong> <em>state</em></dt>
        <dd>Whether protocol renegotiation is supported or not.</dd>
        <dt><strong>securitylevel</strong> <em>level</em></dt>
        <dd>The security level used for selection of ciphers, key size, etc.</dd>
        <dt><strong>session_reused</strong> <em>boolean</em></dt>
        <dd>Whether the session has been reused or not.</dd>
        <dt><strong>is_server</strong> <em>boolean</em></dt>
        <dd>Whether the connection configured as a server or client (false).</dd>
        <dt><strong>compression</strong> <em>mode</em></dt>
        <dd>Compression method.</dd>
        <dt><strong>expansion</strong> <em>mode</em></dt>
        <dd>Expansion method.</dd>
    </dl>
</blockquote>
<blockquote>
	<b>Cipher Info</b>
    <dl>
        <dt><strong>cipher</strong> <em>cipher</em></dt>
        <dd>The current cipher in use for the connection.</dd>
        <dt><strong>standard_name</strong> <em>name</em></dt>
        <dd>The standard RFC name of cipher.</dd>
        <dt><strong>bits</strong> <em>n</em></dt>
        <dd>The number of processed bits used for cipher.</dd>
        <dt><strong>secret_bits</strong> <em>n</em></dt>
        <dd>The number of secret bits used for cipher.</dd>
        <dt><strong>min_version</strong> <em>version</em></dt>
        <dd>The minimum protocol version for cipher.</dd>
        <dt><strong>id</strong> <em>id</em></dt>
        <dd>The OpenSSL cipher id.</dd>
        <dt><strong>description</strong> <em>string</em></dt>
        <dd>A text description of the cipher.</dd>
    </dl>
</blockquote>
<blockquote>
	<b>Session Info</b>
    <dl>
        <dt><strong>alpn</strong> <em>protocol</em></dt>
        <dd>The protocol selected after Application-Layer Protocol
	    Negotiation (ALPN).</dd>
        <dt><strong>resumable</strong> <em>boolean</em></dt>
        <dd>Can the session be resumed or not.</dd>
        <dt><strong>start_time</strong> <em>seconds</em></dt>
        <dd>Time since session started in seconds since epoch.</dd>
        <dt><strong>timeout</strong> <em>seconds</em></dt>
        <dd>Max duration of session in seconds before time-out.</dd>
        <dt><strong>lifetime</strong> <em>seconds</em></dt>
        <dd>Session ticket lifetime hint in seconds.</dd>
        <dt><strong>session_id</strong> <em>string</em></dt>
        <dd>Unique session id for use in resuming the session.</dd>
        <dt><strong>session_ticket</strong> <em>string</em></dt>
        <dd>Unique session ticket for use in resuming the session.</dd>
        <dt><strong>ticket_app_data</strong> <em>string</em></dt>
        <dd>Unique session ticket application data.</dd>
        <dt><strong>master_key</strong> <em>binary_string</em></dt>
        <dd>Unique session master key.</dd>
        <dt><strong>compression</strong> <em>mode</em></dt>
        <dd>Compression method.</dd>
        <dt><strong>expansion</strong> <em>mode</em></dt>
        <dd>Expansion method.</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> 
    <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
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	<dl>

	<dt>
	  <strong>alpn</strong> <em>protocol</em>
	</dt>
	<dd>
	  For servers, this form of callback is invoked when the client ALPN
	  header is received and the first -alpn specified protocol common to
	  the both the client and server is selected. If none, the first
	  header is received and the first <b>-alpn</b> specified protocol common
	  to the both the client and server is selected. If none, the first
	  client specified protocol is used.
	</dd>

	<br>

<!--	This form of callback is disabled.
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