blob: ec6129da6fa9ee577af3429cc01b422f7f49df30 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- This manual is last updated 5 March 2014 for version
3.4.0 of GnuTLS.
Copyright (C) 2001-2012, 2014 Free Software Foundation, Inc.
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 5.2, http://www.gnu.org/software/texinfo/ -->
<head>
<title>GnuTLS-Guile 3.4.0: Anonymous Authentication Guile Example</title>
<meta name="description" content="GnuTLS-Guile 3.4.0: Anonymous Authentication Guile Example">
<meta name="keywords" content="GnuTLS-Guile 3.4.0: Anonymous Authentication Guile Example">
<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="Procedure-Index.html#Procedure-Index" rel="index" title="Procedure Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Guile-Examples.html#Guile-Examples" rel="up" title="Guile Examples">
<link href="OpenPGP-Authentication-Guile-Example.html#OpenPGP-Authentication-Guile-Example" rel="next" title="OpenPGP Authentication Guile Example">
<link href="Guile-Examples.html#Guile-Examples" rel="prev" title="Guile Examples">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.indentedblock {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
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.nocodebreak {white-space:nowrap}
span.nolinebreak {white-space:nowrap}
span.roman {font-family:serif; font-weight:normal}
span.sansserif {font-family:sans-serif; font-weight:normal}
ul.no-bullet {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Anonymous-Authentication-Guile-Example"></a>
<div class="header">
<p>
Next: <a href="OpenPGP-Authentication-Guile-Example.html#OpenPGP-Authentication-Guile-Example" accesskey="n" rel="next">OpenPGP Authentication Guile Example</a>, Up: <a href="Guile-Examples.html#Guile-Examples" accesskey="u" rel="up">Guile Examples</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Procedure-Index.html#Procedure-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Anonymous-Authentication-Guile-Example-1"></a>
<h3 class="section">4.1 Anonymous Authentication Guile Example</h3>
<p><em>Anonymous authentication</em> is very easy to use. No certificates
are needed by the communicating parties. Yet, it allows them to
benefit from end-to-end encryption and integrity checks.
</p>
<p>The client-side code would look like this (assuming <var>some-socket</var>
is bound to an open socket port):
</p>
<a name="index-connection_002dend_002fclient"></a>
<a name="index-kx_002fanon_002ddh"></a>
<a name="index-close_002drequest_002frdwr"></a>
<div class="example">
<pre class="example">;; Client-side.
(let ((client (make-session connection-end/client)))
;; Use the default settings.
(set-session-default-priority! client)
;; Don't use certificate-based authentication.
(set-session-certificate-type-priority! client '())
;; Request the "anonymous Diffie-Hellman" key exchange method.
(set-session-kx-priority! client (list kx/anon-dh))
;; Specify the underlying socket.
(set-session-transport-fd! client (fileno some-socket))
;; Create anonymous credentials.
(set-session-credentials! client
(make-anonymous-client-credentials))
;; Perform the TLS handshake with the server.
(handshake client)
;; Send data over the TLS record layer.
(write "hello, world!" (session-record-port client))
;; Terminate the TLS session.
(bye client close-request/rdwr))
</pre></div>
<p>The corresponding server would look like this (again, assuming
<var>some-socket</var> is bound to a socket port):
</p>
<a name="index-connection_002dend_002fserver"></a>
<div class="example">
<pre class="example">;; Server-side.
(let ((server (make-session connection-end/server)))
(set-session-default-priority! server)
(set-session-certificate-type-priority! server '())
(set-session-kx-priority! server (list kx/anon-dh))
;; Specify the underlying transport socket.
(set-session-transport-fd! server (fileno some-socket))
;; Create anonymous credentials.
(let ((cred (make-anonymous-server-credentials))
(dh-params (make-dh-parameters 1024)))
;; Note: DH parameter generation can take some time.
(set-anonymous-server-dh-parameters! cred dh-params)
(set-session-credentials! server cred))
;; Perform the TLS handshake with the client.
(handshake server)
;; Receive data over the TLS record layer.
(let ((message (read (session-record-port server))))
(format #t "received the following message: ~a~%"
message)
(bye server close-request/rdwr)))
</pre></div>
<p>This is it!
</p>
</body>
</html>
|
