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
|
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
|
-
-
-
+
+
-
-
+
+
-
-
+
+
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
-
+
-
-
+
+
-
-
-
-
+
+
+
+
-
-
-
-
-
+
+
+
+
+
|
<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><b>package require Tcl </b><em>?8.4?</em></dd>
<dd><b>package require tls </b><em>?@@VERS@@?</em></dd>
<dd><b>package require Tcl</b> <em>?8.4?</em></dd>
<dd><b>package require tls</b></dd>
<dt> </dt>
<dd><b>tls::init </b><i>?options?</i> </dd>
<dd><b>tls::socket </b><em>?options? host port</em></dd>
<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>
<b>package require tls @@VERS@@</b><br>
<b>package require tls</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
<a href="#tls::init"><b>tls::init</b> <i>?options?</i></a><br>
<a href="#tls::socket"><b>tls::socket</b> <i>?options? host port</i><br>
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>
</a><a href="#tls::handshake"><b>tls::handshake</b><em> channel</em></a><br>
<br>
<a href="#tls::import"><b>tls::import </b><i>channel ?options?</i></a><br>
<a href="#tls::unimport"><b>tls::unimport </b><i>channel</i></a><br>
<a href="#tls::ciphers protocol ?verbose?"><strong>tls::ciphers</strong>
<em>protocol ?verbose?</em></a><br>
|
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
|
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
|
-
-
+
+
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
-
|
<p>Typically one would use the <strong>tls::socket </strong>command
which provides compatibility with the native Tcl <strong>socket</strong>
command. In such cases <strong>tls::import</strong> should not be
used directly.</p>
<dl>
<dt><a name="tls::init"><b>tls::init </b><i>?options?</i></a></dt>
<dd>This routine sets the default options used by <strong>tls::socket</strong>
and is <em>optional</em>. If you call <strong>tls::import</strong>
<dd>Optional function to set the default options used by
<strong>tls::socket</strong>. If you call <strong>tls::import</strong>
directly this routine has no effect. Any of the options
that <strong>tls::socket</strong> accepts can be set
using this command, though you should limit your options
to only TLS related ones.</dd>
<dt> </dt>
<dt><a name="tls::socket"><b>tls::socket </b><em>?options?
host port</em></a></dt>
<dt><b>tls::socket</b><em> ?-server command? ?options? port</em></dt>
<dd>This is a helper function that utilizes the underlying
commands (<strong>tls::import</strong>). It behaves
exactly the same as the native Tcl <strong>socket</strong>
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>
(default is <em>false</em>)</dd>
</dl>
</blockquote>
<dt><a name="tls::import"><b>tls::import </b><i>channel
?options?</i></a></dt>
<dd>SSL-enable a regular Tcl channel - it need not be a
socket, but must provide bi-directional flow. Also
setting session parameters for SSL handshake.</dd>
<blockquote>
<dl>
<dt><strong>-alpn</strong> <em>list</em></dt>
<dd>List of protocols to offer during Application-Layer
Protocol Negotiation (ALPN). For example: h2, http/1.1, etc.</dd>
<dt><strong>-cadir</strong> <em>dir</em></dt>
<dd>Specify the directory containing the CA certificates. The
default directory is platform specific and can be set at
compile time. This can be overridden via the <b>SSL_CERT_DIR</b>
environment variable.</dd>
<dt><strong>-cafile </strong><em>filename</em></dt>
<dd>Specify the certificate authority (CA) file to use.</dd>
<dt><strong>-certfile</strong> <em>filename</em></dt>
<dd>Specify the filename containing the certificate to use. The
default name is <b>cert.pem</b>. This can be overridden via
the <b>SSL_CERT_FILE</b> environment variable.</dd>
<dt><strong>-cert</strong> <em>filename</em></dt>
<dd>Specify the contents of a certificate to use, as a DER
encoded binary value (X.509 DER).</dd>
<dt><strong>-cipher</strong> <em>string</em></dt>
<dd>List of ciphers to use. String is a colon (":") separated list
of ciphers or cipher suites. Cipher suites can be combined
using the <b>+</b> character. Prefixes can be used to permanently
remove ("!"), delete ("-"), or move a cypher to the end of
the list ("+"). Keywords <b>@STRENGTH</b> (sort by algorithm
key length), <b>@SECLEVEL=</b><i>n</i> (set security level to
n), and <b>DEFAULT</b> (use default cipher list, at start only)
can also be specified. See OpenSSL documentation for the full
list of valid values. (TLS 1.2 and earlier only)</dd>
<dt><strong>-ciphersuites</strong> <em>string</em></dt>
<dd>List of cipher suites to use. String is a colon (":")
separated list of cipher suite names. (TLS 1.3 only)</dd>
<dt><strong>-command</strong> <em>callback</em></dt>
<dd>Callback to invoke at several points during the handshake.
This is used to pass errors and tracing information, and
it can allow Tcl scripts to perform their own certificate
validation in place of the default validation provided by
OpenSSL. See <a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a>
for further discussion.</dd>
<dt><strong>-dhparams </strong><em>filename</em></dt>
<dd>Specify the Diffie-Hellman parameters file.</dd>
<dt><strong>-keyfile</strong> <em>filename</em></dt>
<dd>Specify the private key file. (default is
value of -certfile)</dd>
<dt><strong>-key</strong> <em>filename</em></dt>
<dd>Specify the private key to use as a DER encoded value (PKCS#1 DER)</dd>
<dt><strong>-model</strong> <em>channel</em></dt>
<dd>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>Callback to invoke 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. 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>-securitylevel</strong> <em>integer</em></dt>
<dd>Set security level. Must be 0 to 5. The security level affects
cipher suite encryption algorithms, supported ECC curves,
supported signature algorithms, DH parameter sizes, certificate
key sizes and signature algorithms. The default is 1.
Level 3 and higher disable support for session tickets and only
accept cipher suites that provide forward secrecy.</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>Specify server hostname. 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>-session_id</strong> <em>string</em></dt>
<dd>Session id to resume session.</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>
<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
is thrown if TLS is not the top stacked channel type.</dd>
<dt> </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
this routine will throw an error.</dd>
<dt> </dt>
<dt><a name="tls::status"><strong>tls::status</strong>
<em>?-local? channel</em></a></dt>
<dd>Returns the current security status of an SSL channel. The
<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>
</dl>
|
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
|
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
332
333
334
335
336
337
338
339
340
341
342
343
|
+
+
-
+
-
-
+
-
-
+
-
-
-
+
+
+
-
-
+
+
-
-
+
-
-
-
-
-
-
-
+
+
+
+
+
-
-
-
-
+
+
-
-
+
+
-
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
-
-
+
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
+
-
-
-
-
+
-
-
-
-
+
+
-
-
-
-
-
-
-
-
+
+
+
-
-
+
+
-
-
+
+
-
-
+
+
-
-
+
+
-
-
+
+
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
-
-
+
+
+
+
+
+
-
+
-
+
|
<dd>The number of bits used for the session key.</dd>
<dt><strong>certificate</strong> <em>cert</em></dt>
<dd>The PEM encoded certificate.</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>validation</strong> <em>result</em></dt>
<dd>Certificate validation result.</dd>
<dt><strong>alpn</strong> <em>protocol</em></dt>
<dd>The protocol selected after Application-Layer Protocol
Negotiation (ALPN).</dd>
<dt><strong>version</strong> <em>value</em></dt>
<dd>The protocol version used for the connection:
SSLv2, SSLv3, TLSv1, TLSv1.1, TLSv1.2, TLSv1.3, unknown</dd>
SSLv2, SSLv3, TLSv1, TLSv1.1, TLSv1.2, TLSv1.3, or unknown</dd>
</dl>
</blockquote>
<dl>
<dt><a name="tls::import"><b>tls::import </b><i>channel
?options?</i></a></dt>
<dd>SSL-enable a regular Tcl channel - it need not be a
socket, but must provide bi-directional flow. Also
setting session parameters for SSL handshake.</dd>
</dl>
<dt><strong>-alpn</strong> <em>list</em></dt>
<dd>List of protocols to offer during Application-Layer
<dt><strong>state</strong> <em>state</em></dt>
<dd>State of the connection: initializing, handshake, established</dd>
Protocol Negotiation (ALPN). For example: h2, http/1.1, etc.</dd>
<dt><strong>-cadir</strong> <em>dir</em></dt>
<dd>Provide the directory containing the CA certificates. The
default directory is platform specific and can be set at
compile time. This can be overridden via the <b>SSL_CERT_DIR</b>
environment variable.</dd>
<dt><strong>-cafile </strong><em>filename</em></dt>
<dd>Provide the CA file.</dd>
<dt><strong>-certfile</strong> <em>filename</em></dt>
<dd>Provide the name of a file containing certificate to use.
The default name is cert.pem. This can be overridden via the
<b>SSL_CERT_FILE</b> environment variable.</dd>
<dt><strong>-cert</strong> <em>filename</em></dt>
<dd>Provide the contents of a certificate to use, as a DER encoded binary value (X.509 DER).</dd>
<dt><strong>-cipher </strong><em>string</em></dt>
<dd>Provide the cipher suites to use. Syntax is as per
OpenSSL.</dd>
<dt><strong>-command</strong> <em>callback</em></dt>
<dd>If specified, this callback will be invoked at several points
during the OpenSSL handshake. It can pass errors and tracing
information, and it can allow Tcl scripts to perform
their own validation of the certificate in place of the
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>
<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
is thrown if TLS is not the top stacked channel type.</dd>
</dl>
<dl>
<dt><a name="tls::ciphers protocol ?verbose?"><strong>tls::ciphers</strong>
<em>protocol ?verbose?</em></a></dt>
<dd>Returns list of supported ciphers based on the <em>protocol</em>
you supply, which must be one of <em>ssl2, ssl3, or tls1</em>.
If <em>verbose</em> is specified as true then a verbose,
semi-human readable list is returned providing additional
information on the nature of the cipher support. In each
case the result is a Tcl list.</dd>
</dl>
<dl>
<dd>Returns the version string defined by OpenSSL.</dd>
<dd>Returns the OpenSSL version string.</dd>
</dl>
<h3><a name="CALLBACK OPTIONS">CALLBACK OPTIONS</a></h3>
<p>
As indicated above, individual channels can be given their own callbacks
to handle intermediate processing by the OpenSSL library, using the
|
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
|
+
+
+
+
+
+
+
+
+
+
+
+
+
|
The <em>message</em> argument is a descriptive string which may
be generated either by
<code>SSL_state_string_long()</code> or by
<code>SSL_alert_desc_string_long()</code>,
depending on context.
</dd>
<br>
<dt>
<strong>session</strong> <em>session_id ticket lifetime</em>
</dt>
<dd>
This form of callback is invoked by the OpenSSL function
<code>SSL_CTX_sess_set_new_cb()</code>.
Where <em>session_id</em> is the current session identifier,
<em>ticket</em> is the session ticket info, and <em>lifetime</em>
is the the ticket lifetime in seconds.
</dd>
<br>
<dt>
<strong>verify</strong> <em>channel depth cert status error</em>
</dt>
<dd>
This form of callback is invoked by the OpenSSL function
|