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<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>
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<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>-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>-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>
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<dt><strong>sha256_hash</strong> <em>hash</em></dt>
<dd>The SHA256 hash of the certificate.</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
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/*
* Copyright (C) 1997-1999 Matt Newman <matt@novadigm.com>
* some modifications:
* Copyright (C) 2000 Ajuba Solutions
* Copyright (C) 2002 ActiveState Corporation
* Copyright (C) 2004 Starfish Systems
* Copyright (C) 2023 Brian O'Hagan
*
* TLS (aka SSL) Channel - can be layered on any bi-directional
* Tcl_Channel (Note: Requires Trf Core Patch)
*
* This was built (almost) from scratch based upon observation of
* OpenSSL 0.9.2B
*
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45
46
47
48
49
50
51
52
53
54
|
-
+
|
(((key) == NULL) ? (char *) NULL : \
Tcl_TranslateFileName(interp, (key), (dsp)))
#define REASON() ERR_reason_error_string(ERR_get_error())
static SSL_CTX *CTX_Init(State *statePtr, int isServer, int proto, char *key,
char *certfile, unsigned char *key_asn1, unsigned char *cert_asn1,
int key_asn1_len, int cert_asn1_len, char *CAdir, char *CAfile,
char *ciphers, char *DHparams);
char *ciphers, char *ciphersuites, char *DHparams);
static int TlsLibInit(int uninitialize);
#define TLS_PROTO_SSL2 0x01
#define TLS_PROTO_SSL3 0x02
#define TLS_PROTO_TLS1 0x04
#define TLS_PROTO_TLS1_1 0x08
|
| ︙ | | |
486
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488
489
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491
492
493
494
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|
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|
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
-
+
-
-
+
+
+
+
+
+
-
+
|
* A standard Tcl result list.
*
* Side effects:
* constructs and destroys SSL context (CTX)
*
*-------------------------------------------------------------------
*/
static int
CiphersObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
static const char *protocols[] = {
"ssl2", "ssl3", "tls1", "tls1.1", "tls1.2", "tls1.3", NULL
};
enum protocol {
TLS_SSL2, TLS_SSL3, TLS_TLS1, TLS_TLS1_1, TLS_TLS1_2, TLS_TLS1_3, TLS_NONE
};
Tcl_Obj *objPtr;
int index, verbose = 0;
int index, verbose = 0, use_supported = 0;
dprintf("Called");
if ((objc < 2) || (objc > 3)) {
Tcl_WrongNumArgs(interp, 1, objv, "protocol ?verbose?");
if ((objc < 2) || (objc > 4)) {
Tcl_WrongNumArgs(interp, 1, objv, "protocol ?verbose? ?supported?");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], protocols, "protocol", 0, &index) != TCL_OK) {
return TCL_ERROR;
}
if ((objc > 2) && Tcl_GetBooleanFromObj(interp, objv[2], &verbose) != TCL_OK) {
return TCL_ERROR;
}
if ((objc > 3) && Tcl_GetBooleanFromObj(interp, objv[3], &use_supported) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum protocol)index) {
case TLS_SSL2:
#if OPENSSL_VERSION_NUMBER >= 0x10101000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
#if OPENSSL_VERSION_NUMBER >= 0x10100000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
Tcl_AppendResult(interp, protocols[index], ": protocol not supported", NULL);
return TCL_ERROR;
#else
ctx = SSL_CTX_new(SSLv2_method()); break;
#endif
case TLS_SSL3:
#if defined(NO_SSL3) || defined(OPENSSL_NO_SSL3)
|
| ︙ | | |
566
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568
569
570
571
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609
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611
|
572
573
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576
577
578
579
580
581
582
583
584
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586
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669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
|
+
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
+
+
+
-
-
-
+
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
|
default:
break;
}
if (ctx == NULL) {
Tcl_AppendResult(interp, REASON(), NULL);
return TCL_ERROR;
}
ssl = SSL_new(ctx);
if (ssl == NULL) {
Tcl_AppendResult(interp, REASON(), NULL);
SSL_CTX_free(ctx);
return TCL_ERROR;
}
objPtr = Tcl_NewListObj(0, NULL);
if (!verbose) {
for (index = 0; ; index++) {
cp = (char*)SSL_get_cipher_list(ssl, index);
if (cp == NULL) break;
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(cp, -1));
}
} else {
sk = SSL_get_ciphers(ssl);
for (index = 0; index < sk_SSL_CIPHER_num(sk); index++) {
register size_t i;
SSL_CIPHER_description(sk_SSL_CIPHER_value(sk, index), buf, sizeof(buf));
for (i = strlen(buf) - 1; i ; i--) {
if ((buf[i] == ' ') || (buf[i] == '\n') || (buf[i] == '\r') || (buf[i] == '\t')) {
buf[i] = '\0';
break;
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(buf, -1));
|
| ︙ | | |
716
717
718
719
720
721
722
723
724
725
726
727
728
729
|
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
|
+
|
char *keyfile = NULL;
char *certfile = NULL;
unsigned char *key = NULL;
int key_len = 0;
unsigned char *cert = NULL;
int cert_len = 0;
char *ciphers = NULL;
char *ciphersuites = NULL;
char *CAfile = NULL;
char *CAdir = NULL;
char *DHparams = NULL;
char *model = NULL;
#ifndef OPENSSL_NO_TLSEXT
char *servername = NULL; /* hostname for Server Name Indication */
Tcl_Obj *alpn = NULL;
|
| ︙ | | |
775
776
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778
779
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783
784
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786
787
788
|
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
|
+
|
if (opt[0] != '-')
break;
OPTSTR("-cadir", CAdir);
OPTSTR("-cafile", CAfile);
OPTSTR("-certfile", certfile);
OPTSTR("-cipher", ciphers);
OPTSTR("-ciphersuites", ciphersuites);
OPTOBJ("-command", script);
OPTSTR("-dhparams", DHparams);
OPTSTR("-keyfile", keyfile);
OPTSTR("-model", model);
OPTOBJ("-password", password);
OPTBOOL("-require", require);
OPTBOOL("-request", request);
|
| ︙ | | |
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
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819
820
821
822
823
824
825
826
827
828
829
830
831
|
874
875
876
877
878
879
880
881
882
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885
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888
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890
891
892
893
894
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897
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899
900
901
902
903
904
905
906
907
908
909
|
-
+
+
|
OPTBOOL("-tls1", tls1);
OPTBOOL("-tls1.1", tls1_1);
OPTBOOL("-tls1.2", tls1_2);
OPTBOOL("-tls1.3", tls1_3);
OPTBYTE("-cert", cert, cert_len);
OPTBYTE("-key", key, key_len);
OPTBAD("option", "-alpn, -cadir, -cafile, -cert, -certfile, -cipher, -command, -dhparams, -key, -keyfile, -model, -password, -require, -request, -server, -servername, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, or -tls1.3");
OPTBAD("option", "-alpn, -cadir, -cafile, -cert, -certfile, -cipher, -ciphersuites, -command, -dhparams, -key, -keyfile, -model, -password, -require, -request, -server, -servername, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, or -tls1.3");
return TCL_ERROR;
}
if (request) verify |= SSL_VERIFY_CLIENT_ONCE | SSL_VERIFY_PEER;
if (request && require) verify |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
if (verify == 0) verify = SSL_VERIFY_NONE;
proto |= (ssl2 ? TLS_PROTO_SSL2 : 0);
proto |= (ssl3 ? TLS_PROTO_SSL3 : 0);
proto |= (tls1 ? TLS_PROTO_TLS1 : 0);
proto |= (tls1_1 ? TLS_PROTO_TLS1_1 : 0);
proto |= (tls1_2 ? TLS_PROTO_TLS1_2 : 0);
proto |= (tls1_3 ? TLS_PROTO_TLS1_3 : 0);
/* reset to NULL if blank string provided */
if (cert && !*cert) cert = NULL;
if (key && !*key) key = NULL;
if (certfile && !*certfile) certfile = NULL;
if (keyfile && !*keyfile) keyfile = NULL;
if (ciphers && !*ciphers) ciphers = NULL;
if (ciphersuites && !*ciphersuites) ciphersuites = NULL;
if (CAfile && !*CAfile) CAfile = NULL;
if (CAdir && !*CAdir) CAdir = NULL;
if (DHparams && !*DHparams) DHparams = NULL;
/* new SSL state */
statePtr = (State *) ckalloc((unsigned) sizeof(State));
memset(statePtr, 0, sizeof(State));
|
| ︙ | | |
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
|
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
|
-
+
|
"\": not a TLS channel", NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
ctx = ((State *)Tcl_GetChannelInstanceData(chan))->ctx;
} else {
if ((ctx = CTX_Init(statePtr, server, proto, keyfile, certfile, key, cert,
key_len, cert_len, CAdir, CAfile, ciphers, DHparams)) == (SSL_CTX*)0) {
key_len, cert_len, CAdir, CAfile, ciphers, ciphersuites, DHparams)) == (SSL_CTX*)0) {
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
}
statePtr->ctx = ctx;
|
| ︙ | | |
933
934
935
936
937
938
939
940
941
942
943
944
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946
947
948
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954
955
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957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
|
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
|
-
+
-
+
-
+
-
+
|
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
}
if (alpn) {
/* Convert a Tcl list into a protocol-list in wire-format */
unsigned char *protos, *p;
unsigned int protoslen = 0;
unsigned int protos_len = 0;
int i, len, cnt;
Tcl_Obj **list;
if (Tcl_ListObjGetElements(interp, alpn, &cnt, &list) != TCL_OK) {
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
/* Determine the memory required for the protocol-list */
for (i = 0; i < cnt; i++) {
Tcl_GetStringFromObj(list[i], &len);
if (len > 255) {
Tcl_AppendResult(interp, "alpn protocol name too long", (char *) NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
protoslen += 1 + len;
protos_len += 1 + len;
}
/* Build the complete protocol-list */
protos = ckalloc(protoslen);
protos = ckalloc(protos_len);
/* protocol-lists consist of 8-bit length-prefixed, byte strings */
for (i = 0, p = protos; i < cnt; i++) {
char *str = Tcl_GetStringFromObj(list[i], &len);
*p++ = len;
memcpy(p, str, len);
p += len;
}
/* Note: This functions reverses the return value convention */
if (SSL_set_alpn_protos(statePtr->ssl, protos, protoslen)) {
if (SSL_set_alpn_protos(statePtr->ssl, protos, protos_len)) {
Tcl_AppendResult(interp, "failed to set alpn protocols", (char *) NULL);
Tls_Free((char *) statePtr);
ckfree(protos);
return TCL_ERROR;
}
/* SSL_set_alpn_protos makes a copy of the protocol-list */
ckfree(protos);
|
| ︙ | | |
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
|
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
|
-
+
-
+
|
* constructs SSL context (CTX)
*
*-------------------------------------------------------------------
*/
static SSL_CTX *
CTX_Init(State *statePtr, int isServer, int proto, char *keyfile, char *certfile,
unsigned char *key, unsigned char *cert, int key_len, int cert_len, char *CAdir,
char *CAfile, char *ciphers, char *DHparams) {
char *CAfile, char *ciphers, char *ciphersuites, char *DHparams) {
Tcl_Interp *interp = statePtr->interp;
SSL_CTX *ctx = NULL;
Tcl_DString ds;
Tcl_DString ds1;
int off = 0;
int load_private_key;
const SSL_METHOD *method;
dprintf("Called");
if (!proto) {
Tcl_AppendResult(interp, "no valid protocol selected", NULL);
return (SSL_CTX *)0;
}
/* create SSL context */
#if OPENSSL_VERSION_NUMBER >= 0x10101000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
#if OPENSSL_VERSION_NUMBER >= 0x10100000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
if (ENABLED(proto, TLS_PROTO_SSL2)) {
Tcl_AppendResult(interp, "SSL2 protocol not supported", NULL);
return (SSL_CTX *)0;
}
#endif
#if defined(NO_SSL3) || defined(OPENSSL_NO_SSL3)
if (ENABLED(proto, TLS_PROTO_SSL3)) {
|
| ︙ | | |
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
|
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
|
-
+
|
if (ENABLED(proto, TLS_PROTO_TLS1_3)) {
Tcl_AppendResult(interp, "TLS 1.3 protocol not supported", NULL);
return (SSL_CTX *)0;
}
#endif
switch (proto) {
#if OPENSSL_VERSION_NUMBER < 0x10101000L && !defined(NO_SSL2) && !defined(OPENSSL_NO_SSL2)
#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(NO_SSL2) && !defined(OPENSSL_NO_SSL2)
case TLS_PROTO_SSL2:
method = SSLv2_method();
break;
#endif
#if !defined(NO_SSL3) && !defined(OPENSSL_NO_SSL3)
case TLS_PROTO_SSL3:
method = SSLv3_method();
|
| ︙ | | |
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
|
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
|
-
-
+
+
+
+
+
+
+
|
SSL_CTX_set_options(ctx, SSL_OP_ALL); /* all SSL bug workarounds */
SSL_CTX_set_options(ctx, off); /* disable protocol versions */
#if OPENSSL_VERSION_NUMBER < 0x10101000L
SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY); /* handle new handshakes in background */
#endif
SSL_CTX_sess_set_cache_size(ctx, 128);
if (ciphers != NULL)
SSL_CTX_set_cipher_list(ctx, ciphers);
/* Set user defined ciphers and cipher suites */
if (((ciphers != NULL) && !SSL_CTX_set_cipher_list(ctx, ciphers)) || \
((ciphersuites != NULL) && !SSL_CTX_set_ciphersuites(ctx, ciphersuites))) {
Tcl_AppendResult(interp, "Set ciphers failed", (char *) NULL);
SSL_CTX_free(ctx);
return (SSL_CTX *)0;
}
/* set some callbacks */
SSL_CTX_set_default_passwd_cb(ctx, PasswordCallback);
#ifndef BSAFE
SSL_CTX_set_default_passwd_cb_userdata(ctx, (void *)statePtr);
#endif
|
| ︙ | | |
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
|
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
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1561
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1567
1568
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1585
1586
1587
1588
1589
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1591
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1597
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1600
1601
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1607
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1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
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1626
1627
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1631
1632
1633
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1646
1647
1648
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1650
1651
1652
1653
1654
1655
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1657
1658
1659
1660
1661
1662
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1664
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1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
|
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
|
/* Report the selected protocol as a result of the negotiation */
SSL_get0_alpn_selected(statePtr->ssl, &proto, &len);
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("alpn", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *)proto, (int)len));
#endif
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("version", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_version(statePtr->ssl), -1));
Tcl_SetObjResult(interp, objPtr);
return TCL_OK;
clientData = clientData;
}
/*
*-------------------------------------------------------------------
*
* ConnectionInfoObjCmd -- return connection info from OpenSSL.
*
* Results:
* A list of connection info
*
*-------------------------------------------------------------------
*/
static int ConnectionInfoObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
Tcl_Channel chan; /* The channel to set a mode on. */
State *statePtr; /* client state for ssl socket */
Tcl_Obj *objPtr;
const SSL *ssl;
const SSL_CIPHER *cipher;
#if !defined(OPENSSL_NO_TLSEXT) && OPENSSL_VERSION_NUMBER >= 0x10002000L
const unsigned char *proto;
unsigned int len;
#endif
#if defined(HAVE_SSL_COMPRESSION) && OPENSSL_VERSION_NUMBER >= 0x10002000L
const COMP_METHOD *comp;
#endif
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "channel");
return(TCL_ERROR);
}
chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], NULL), NULL);
if (chan == (Tcl_Channel) NULL) {
return(TCL_ERROR);
}
/*
* Make sure to operate on the topmost channel
*/
chan = Tcl_GetTopChannel(chan);
if (Tcl_GetChannelType(chan) != Tls_ChannelType()) {
Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan), "\": not a TLS channel", NULL);
return(TCL_ERROR);
}
objPtr = Tcl_NewListObj(0, NULL);
/* Get connection state */
statePtr = (State *)Tcl_GetChannelInstanceData(chan);
ssl = statePtr->ssl;
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("state", -1));
if (SSL_is_init_finished(ssl)) {
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("established", -1));
} else if (SSL_in_init(ssl)) {
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("handshake", -1));
} else {
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("initializing", -1));
}
/* Get server name */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("server", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name), -1));
/* Get protocol */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("protocol", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_version(ssl), -1));
/* Get cipher */
cipher = SSL_get_current_cipher(ssl);
if (cipher != NULL) {
char buf[BUFSIZ] = {0};
int bits, alg_bits;
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("cipher", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_CIPHER_get_name(cipher), -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("standard_name", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_CIPHER_standard_name(cipher), -1));
bits = SSL_CIPHER_get_bits(cipher, &alg_bits);
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("bits", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(bits));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("secret_bits", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(alg_bits));
/* alg_bits is actual key secret bits. If use bits and secret (algorithm) bits differ,
the rest of the bits are fixed, i.e. for limited export ciphers (bits < 56) */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("min_version", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_CIPHER_get_version(cipher), -1));
if (SSL_CIPHER_description(cipher, buf, sizeof(buf)) != NULL) {
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("description", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(buf, -1));
}
}
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("renegotiation", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(
SSL_get_secure_renegotiation_support(ssl) ? "allowed" : "disallowed", -1));
#if !defined(OPENSSL_NO_TLSEXT) && OPENSSL_VERSION_NUMBER >= 0x10002000L
/* Report the selected protocol as a result of the negotiation */
SSL_get0_alpn_selected(ssl, &proto, &len);
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("alpn", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *)proto, (int)len));
#endif
/* Session info */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("session_reused", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(SSL_session_reused(ssl)));
#if defined(HAVE_SSL_COMPRESSION) && OPENSSL_VERSION_NUMBER >= 0x10002000L
/* Compression info */
comp = SSL_get_current_compression(ssl);
if (comp != NULL) {
expansion = SSL_get_current_expansion(ssl);
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("compression", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_COMP_get_name(comp), -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("expansion", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_COMP_get_name(expansion), -1));
}
#endif
Tcl_SetObjResult(interp, objPtr);
return TCL_OK;
clientData = clientData;
}
/*
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if (TlsLibInit(0) != TCL_OK) {
Tcl_AppendResult(interp, "could not initialize SSL library", NULL);
return TCL_ERROR;
}
Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::connection", ConnectionInfoObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::import", ImportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::unimport", UnimportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::status", StatusObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::version", VersionObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::misc", MiscObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::protocols", ProtocolsObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
if (interp) {
Tcl_Eval(interp, tlsTclInitScript);
}
return(Tcl_PkgProvide(interp, "tls", PACKAGE_VERSION));
}
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