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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>CL+SSL</title>
<link rel="stylesheet" type="text/css" href="index.css"/>
</head>
<body>
<h1>CL+SSL</h1>
<p>
A Common Lisp interface to OpenSSL.
</p>
<h3>About</h3>
<p>
This library is a fork
of <a href="http://www.cliki.net/SSL-CMUCL">SSL-CMUCL</a>. The
original SSL-CMUCL source code was written by Eric Marsden and
includes contributions by Jochen Schmidt. Development into CL+SSL
was done by David Lichteblau. License: MIT-style.
</p>
<p>
Distinguishing features: CL+SSL is portable code based on CFFI and
gray streams. It defines its own libssl BIO method, so that SSL
I/O can be written over portable Lisp streams instead of bypassing
the streams and sending data over Unix file descriptors directly.
(But the traditional approach is still used if possible.)
</p>
<h3>Download</h3>
<p>
The library is available via <a href="http://www.quicklisp.org/">Quicklisp</a>.
</p>
<p>
The Git repository: <a href="https://github.com/cl-plus-ssl/cl-plus-ssl">https://github.com/cl-plus-ssl/cl-plus-ssl</a>.
</p>
<p>
Send bug reports to <a
href="mailto:cl-plus-ssl-devel@common-lisp.net">cl-plus-ssl-devel@common-lisp.net</a>
(<a
href="http://common-lisp.net/cgi-bin/mailman/listinfo/cl-plus-ssl-devel">list
information</a>).
</p>
<p>
<i>Note</i> that you need the <tt>libssl-dev</tt> package on Debian to
load this package without manual configuration.
</p>
<p>
OpenSSL binaries for Windows may be found at
<a href="http://www.slproweb.com/products/Win32OpenSSL.html">http://www.slproweb.com/products/Win32OpenSSL.html</a>
(slproweb.com is a 3rd party; if you have questions about the OpenSSL installer they provide,
please ask in the mailing list specified on the linked page).
</p>
<!--
<p>
Comparison chart:
</p>
<table border="1" cellpadding="2" cellspacing="0">
<thead>
<tr>
<th></th>
<th><b>FFI</b></th>
<th><b>Streams</b></th>
<th><b>Lisp-BIO</b></th>
</tr>
</thead>
<tr>
<td>CL+SSL</td>
<td>CFFI</td>
<td>gray<sup>1</sup>, buffering output</td>
<td>yes</td>
</tr>
<tr>
<td>CL-SSL</td>
<td>UFFI</td>
<td>gray, buffering I/O [<em>part of ACL-COMPAT</em>]</td>
<td>no</td>
</tr>
<tr>
<td>SSL-CMUCL</td>
<td>CMUCL/ALIEN</td>
<td>CMUCL, non-buffering</td>
<td>no</td>
</tr>
</table>
<p>
<sup>1</sup> Character I/O and external formats in CL+SSL
are provided
using <a href="http://weitz.de/flexi-streams/">flexi-streams</a>.
</p>
-->
<h3>API functions</h3>
<p>
<div class="def">Function CL+SSL:ENSURE-INITIALIZED (&key (method 'ssl-v23-method) (rand-seed nil))</div>
In most cases you <strong>do not</strong> need to call this function, because it is called
automatically. The only reason to call it explicitly is to supply the <tt>rand-seed</tt> parameter.
In this case do it before calling any other functions.
</p>
<p>
Keyword arguments:
</p>
<p>
<tt>method</tt>. Just leave its default value.
</p>
<p>
<tt>rand-seed</tt> is an octet sequence to initialize OpenSSL random number generator.
On many platforms, including Linux and Windows, it may be leaved NIL (default),
because OpenSSL initializes the random number generator from OS specific service. But for
example on Solaris it may be necessary to supply this value. The minimum length required
by OpenSSL is 128 bits. See here <a href="http://www.openssl.org/support/faq.html#USER1">
http://www.openssl.org/support/faq.html#USER1</a> for the details.
</p>
<p>
Hint: do not use Common Lisp RANDOM function to generate the <tt>rand-seed</tt>, because the function
usually returns predictable values.
</p>
<p>
<div class="def">Function CL+SSL:MAKE-SSL-CLIENT-STREAM (fd-or-stream &key external-format certificate key password close-callback (unwrap-streams-p t))<br/><br/>
Function CL+SSL:MAKE-SSL-SERVER-STREAM (fd-or-stream &key external-format certificate key password close-callback (unwrap-streams-p t))</div>
Return an SSL stream for the client (server)
socket <tt>fd-or-stream</tt>. All reads and writes to this
stream will be pushed through the OpenSSL library.
</p>
<p>
Keyword arguments:
</p>
<p>
If <tt>fd-or-stream</tt> is a lisp stream, the SSL stream will
close it automatically. File descriptors are not closed
automatically. However, if <tt>close-callback</tt> is non-nil, it
will be called with zero arguments when the SSL stream is closed.
</p>
<p>
If <tt>unwrap-stream-p</tt> is true (the default), a stream for a
file descriptor will be replaced by that file descriptor
automatically. This is similar to passing the result
of <tt>stream-fd</tt> as an argument, except that a deadline
associated with the stream object will be taken into account, and
that the stream will be closed automatically. As with file
descriptor arguments, no I/O will actually be done on the stream
object.
</p>
<p>
<tt>certificate</tt> is the path to a file containing the PEM-encoded
certificate.
</p>
<p>
<tt>key</tt> is the path to the PEM-encoded key, which may be associated
with the passphrase <tt>password</tt>.
</p>
<p>
If <tt>external-format</tt> is <tt>nil</tt> (the default), a plain
<tt>(unsigned-byte 8)</tt> SSL stream is returned. With a
non-null <tt>external-format</tt>, a flexi-stream capable of
character I/O will be returned instead, with the specified value
as its initial external format.
</p>
<p>
<div class="def">Function CL+SSL:USE-CERTIFICATE-CHAIN-FILE (certificate-chain-file)</div>
Loads a PEM encoded certificate chain file <tt>certificate-chain-file</tt>
and adds the chain to global context. The certificates must be sorted
starting with the subject's certificate (actual client or server certificate),
followed by intermediate CA certificates if applicable, and ending at
the highest level (root) CA.
</p>
<p>
Note: the RELOAD function clears the global
context and in particular the loaded certificate chain.
</p>
<p>
<div class="def">Function CL+SSL:RELOAD ()</div>
Reload <tt>libssl</tt>. Call this function after restarting a Lisp
core with CL+SSL dumped into it on Lisp implementations that do
not reload shared libraries automatically.
</p>
<p>
<div class="def">Function CL+SSL:STREAM-FD (stream)</div>
Return <tt>stream</tt>'s file descriptor as an integer, if known.
Otherwise return <tt>stream</tt> itself. The result of this
function can be passed to <tt>make-ssl-client-stream</tt>
and <tt>make-ssl-server-stream</tt>.
</p>
<p>
<div class="def">Function CL+SSL:RANDOM-BYTES (count)</div>
Generates <tt>count</tt> cryptographically strong pseudo-random bytes. Returns
the bytes as a <tt>simple-array</tt> with <tt>element-type '(unsigned-byte 8)</tt>.
Signals an <tt>error</tt> in case of problems, for example when the OpenSSL
random number generator has not been seeded with enough randomness to ensure
an unpredictable byte sequence.
</p>
<h3>Portability</h3>
<p>
CL+SSL requires CFFI with callback support.
</p>
<p>
Test results for Linux/x86, except OpenMCL which was tested on
Linux/PPC:
</p>
<table border="1" cellpadding="2" cellspacing="0">
<thead>
<tr>
<th><b>Lisp Implementation</b></th>
<th><b>Status</b></th>
<th><b>Comments</b></th>
</tr>
</thead>
<tr><td>OpenMCL</td><td class="working">Working</td></tr>
<tr><td>SBCL</td><td class="working">Working</td></tr>
<tr><td>CMU CL</td><td class="working">Working</td></tr>
<tr><td>CLISP</td><td class="working">Working</td></tr>
<tr><td>LispWorks</td><td class="working">Working</td></tr>
<tr>
<td>Allegro</td>
<td class="broken">Broken</td>
<td>segfault</td>
</tr>
<tr><td>Corman CL</td><td class="unknown">Unknown</td></tr>
<tr><td>Digitool MCL</td><td class="unknown">Unknown</td></tr>
<tr><td>Scieneer CL</td><td class="unknown">Unknown</td></tr>
<tr><td>ECL</td><td class="unknown">Unknown</td></tr>
<tr><td>GCL</td><td class="unknown">Unknown</td></tr>
</table>
<h3>TODO</h3>
<ul>
<li>CNAME checking</li>
<li>session caching</li>
<li>The FFI code for all platforms except clisp needs to be
rewritten.</li>
</ul>
<h3>News</h3>
<p>
2011-05-22
</p>
<ul>
<li>
Added new public function RANDOM-BYTES.
</li>
</ul>
<p>
2011-05-22
</p>
<ul>
<li>
The source code repository is moved to Git.
</li>
</ul>
<p>
2011-03-25
</p>
<ul>
<li>
OpenSSL libraries names for OpenBSD, thanks to Thomas de Grivel.
</li>
</ul>
<p>
2010-05-26
</p>
<ul>
<li>
Fixed two bugs in LISTEN, thanks to Ron Garret.
</li>
</ul>
<p>
2009-09-17
</p>
<ul>
<li>
libssl loading on FreeBSD 7.2 fixed, thanks to Stian Sletner.
</li>
</ul>
<p>
2008-xx-yy
</p>
<ul>
<li>
Support for I/O deadlines (Clozure CL and SBCL).
</li>
<li>
Support for encrypted keys, thanks to Vsevolod Dyomkin.
</li>
<li>
Chained certificates support, thanks to Juhani Rnkimies.
</li>
<li>
More secure initialization of OpenSSL random number generator.
</li>
<li>
Minor CLISP-specific fixes.
</li>
</ul>
<p>
2007-xx-yy
</p>
<ul>
<li>
Fixed windows support, thanks to Matthew Kennedy and Anton Vodonosov.
</li>
</ul>
<p>
2007-07-07
</p>
<ul>
<li>
Improved CLISP support, thanks
to <a
href="http://web.kepibu.org/code/lisp/cl+ssl/">Pixel
// pinterface</a>, as well as client certificate support.
</li>
<li>
Re-introduced support for direct access to file descriptors as
an optimization. New function <tt>stream-fd</tt>. New keyword
argument <tt>close-callback</tt>.
</li>
</ul>
<p>
2007-01-16: CL+SSL is now available under an MIT-style license.
</p>
</body>
</html>
|
