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author | Nikos Mavrogiannopoulos <nmav@gnutls.org> | 2016-09-11 10:34:21 +0200 |
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committer | Nikos Mavrogiannopoulos <nmav@gnutls.org> | 2016-09-11 10:50:54 +0200 |
commit | 61a6551e469c7dbbbecf1cedfa142e88501428cd (patch) | |
tree | ebb0874e06efad4dc614f12ab71d3876201ddbd3 /manual/html_node/Deriving-keys-for-other-applications_002fprotocols.html | |
parent | 4b1dc46ae2106e720600f21609af107bc372f6c5 (diff) | |
download | gnutls-61a6551e469c7dbbbecf1cedfa142e88501428cd.tar.gz |
Redesigned web page generationweb-pages2
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diff --git a/manual/html_node/Deriving-keys-for-other-applications_002fprotocols.html b/manual/html_node/Deriving-keys-for-other-applications_002fprotocols.html deleted file mode 100644 index 39836b1a80..0000000000 --- a/manual/html_node/Deriving-keys-for-other-applications_002fprotocols.html +++ /dev/null @@ -1,205 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> -<html> -<!-- This manual is last updated 4 March 2015 for version -3.5.4 of GnuTLS. - -Copyright (C) 2001-2015 Free Software Foundation, Inc.\\ -Copyright (C) 2001-2015 Nikos Mavrogiannopoulos - -Permission is granted to copy, distribute and/or modify this document -under the terms of the GNU Free Documentation License, Version 1.3 or -any later version published by the Free Software Foundation; with no -Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A -copy of the license is included in the section entitled "GNU Free -Documentation License". --> -<!-- Created by GNU Texinfo 6.1, http://www.gnu.org/software/texinfo/ --> -<head> -<title>GnuTLS 3.5.4: Deriving keys for other applications/protocols</title> - -<meta name="description" content="GnuTLS 3.5.4: Deriving keys for other applications/protocols"> -<meta name="keywords" content="GnuTLS 3.5.4: Deriving keys for other applications/protocols"> -<meta name="resource-type" content="document"> -<meta name="distribution" content="global"> -<meta name="Generator" content="makeinfo"> -<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> -<link href="index.html#Top" rel="start" title="Top"> -<link href="Function-and-Data-Index.html#Function-and-Data-Index" rel="index" title="Function and Data Index"> -<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> -<link href="Advanced-topics.html#Advanced-topics" rel="up" title="Advanced topics"> -<link href="Channel-Bindings.html#Channel-Bindings" rel="next" title="Channel Bindings"> -<link href="Parameter-generation.html#Parameter-generation" rel="prev" title="Parameter generation"> -<style type="text/css"> -<!-- -a.summary-letter {text-decoration: none} -blockquote.indentedblock {margin-right: 0em} -blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} -blockquote.smallquotation {font-size: smaller} -div.display {margin-left: 3.2em} -div.example {margin-left: 3.2em} -div.lisp {margin-left: 3.2em} -div.smalldisplay {margin-left: 3.2em} -div.smallexample {margin-left: 3.2em} -div.smalllisp {margin-left: 3.2em} -kbd {font-style: oblique} -pre.display {font-family: inherit} -pre.format {font-family: inherit} -pre.menu-comment {font-family: serif} -pre.menu-preformatted {font-family: serif} -pre.smalldisplay {font-family: inherit; font-size: smaller} -pre.smallexample {font-size: smaller} -pre.smallformat {font-family: inherit; font-size: smaller} -pre.smalllisp {font-size: smaller} -span.nolinebreak {white-space: nowrap} -span.roman {font-family: initial; font-weight: normal} -span.sansserif {font-family: sans-serif; font-weight: normal} -ul.no-bullet {list-style: none} -body { - margin: 2%; - padding: 0 5%; - background: #ffffff; -} -h1,h2,h3,h4,h5 { - font-weight: bold; - padding: 5px 5px 5px 5px; - background-color: #c2e0ff; - color: #336699; -} -h1 { - padding: 2em 2em 2em 5%; - color: white; - background: #336699; - text-align: center; - letter-spacing: 3px; -} -h2 { text-decoration: underline; } -pre { - margin: 0 5%; - padding: 0.5em; -} -pre.example,pre.verbatim { - padding-bottom: 1em; - - border: solid #c2e0ff; - background: #f0faff; - border-width: 1px 1px 1px 5px; - margin: 1em auto; - width: 90%; -} - -div.node { - margin: 0 -5% 0 -2%; - padding: 0.5em 0.5em; - margin-top: 0.5em; - margin-bottom: 0.5em; - font-weight: bold; -} -dd, li { - padding-top: 0.1em; - padding-bottom: 0.1em; -} -div.float { - - margin-bottom: 0.5em; - text-align: center; -} - -table { - text-align: left; - margin-left:auto; - margin-right:auto; - border-spacing: 7px; - width: 50%; -} - -th { - padding: 0; - color: #336699; - background-color: #c2e0ff; - border: solid #000000; - border-width: 0px; - margin: 1em auto; - text-align: center; - margin-left:auto; - margin-right:auto; -} - -td { - padding: 0; - border: solid #000000; - background-color: #f0faff; - border-width: 0px; - margin: 1em auto; - text-align: left; - margin-left:auto; - margin-right:auto; - padding-left: 1em; -} - -dl { - text-align: left; - margin-left:auto; - margin-right:auto; - width: 50%; - - padding-left: 1em; - border: solid #c2e0ff; - background: #f0faff; - border-width: 5px 1px 1px 1px; - margin: 1em auto; -} - ---> -</style> - - -</head> - -<body lang="en"> -<a name="Deriving-keys-for-other-applications_002fprotocols"></a> -<div class="header"> -<p> -Next: <a href="Channel-Bindings.html#Channel-Bindings" accesskey="n" rel="next">Channel Bindings</a>, Previous: <a href="Parameter-generation.html#Parameter-generation" accesskey="p" rel="prev">Parameter generation</a>, Up: <a href="Advanced-topics.html#Advanced-topics" accesskey="u" rel="up">Advanced topics</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p> -</div> -<hr> -<a name="Deriving-keys-for-other-applications_002fprotocols-1"></a> -<h4 class="subsection">6.12.5 Deriving keys for other applications/protocols</h4> -<a name="index-keying-material-exporters"></a> -<a name="index-exporting-keying-material"></a> -<a name="index-deriving-keys"></a> -<a name="index-key-extraction"></a> - -<p>In several cases, after a TLS connection is established, it is desirable -to derive keys to be used in another application or protocol (e.g., in an -other TLS session using pre-shared keys). The following describe GnuTLS’ -implementation of RFC5705 to extract keys based on a session’s master secret. -</p> -<p>The API to use is <a href="Core-TLS-API.html#gnutls_005fprf">gnutls_prf</a>. The -function needs to be provided with a label, -and additional context data to mix in the <code>extra</code> parameter. -Moreover, the API allows to switch the mix of the -client and server random nonces, using the <code>server_random_first</code> parameter. -In typical uses you don’t need it, so a zero value should be provided in <code>server_random_first</code>. -</p> -<p>For example, after establishing a TLS session using -<a href="Core-TLS-API.html#gnutls_005fhandshake">gnutls_handshake</a>, you can obtain 32-bytes to be used as key, using this call: -</p> -<div class="example"> -<pre class="example">#define MYLABEL "EXPORTER-My-protocol-name" -#define MYCONTEXT "my-protocol's-1st-session" - -char out[32]; -rc = gnutls_prf (session, sizeof(MYLABEL)-1, MYLABEL, 0, - sizeof(MYCONTEXT)-1, MYCONTEXT, 32, out); -</pre></div> - -<p>The output key depends on TLS’ master secret, and is the same on both client -and server. -</p> -<p>If you don’t want to use the RFC5705 interface and not mix in the client and server random -nonces, there is a low-level TLS PRF interface called <a href="Core-TLS-API.html#gnutls_005fprf_005fraw">gnutls_prf_raw</a>. -</p> - - - -</body> -</html> |