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</head>
<body bgcolor="#FFFFFF">
<dl>
<dd><a href="#NAME">NAME</a>
<dl>
<dd><b>tls</b> - binding to <b>OpenSSL</b> toolkit.</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> <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::connection </b> <em>channel</em></dd>
<dd><b>tls::import</b> <em>channel ?options?</em></dd>
<dd><b>tls::unimport</b> <em>channel</em></dd>
<dt> </dt>
<dd><b>tls::ciphers </b> <em>protocol ?verbose? ?supported?</em></dd>
<dd><b>tls::protocols</b></dd>
<dd><b>tls::version</b></dd>
</dl>
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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>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>
host port</em></a></dt>
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:
<dt><strong>-autoservername</strong> <em>bool</em></dt>
<dd>Automatically send the -servername as the <em>host</em> argument
(default is <em>false</em>)</dd>
?options?</i></a></dt>
socket, but must provide bi-directional flow. Also
setting session parameters for SSL handshake.</dd>
<dt><strong>-alpn</strong> <em>list</em></dt>
<dd>List of protocols to offer during Application-Layer
<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
<dt><strong>-cipher</strong> <em>string</em></dt>
<dd>List of ciphers to use. String is a colon (":") separated list
<dt><strong>-ciphersuites</strong> <em>string</em></dt>
<dd>List of cipher suites to use. String is a colon (":")
<dt><strong>-command</strong> <em>callback</em></dt>
<dd>Callback to invoke at several points during the handshake.
<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,
callback should return a string which represents the password
to be used. See <a href="#CALLBACK OPTIONS">CALLBACK OPTIONS</a>
<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.
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
<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
<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>
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>
SSL handshake has not yet completed. If <em>-local</em> is
<dt><strong>alpn</strong> <em>protocol</em></dt>
<dd>The protocol selected after Application-Layer Protocol
<dt><strong>cipher</strong> <em>cipher</em></dt>
<dd>The current cipher in use between the client and
server channels.</dd>
<dt><strong>peername</strong> <em>name</em></dt>
<dd>The peername from the certificate.</dd>
<dt><strong>protocol</strong> <em>version</em></dt>
<dd>The protocol version used for the connection:
<dt><strong>sbits</strong> <em>n</em></dt>
<dd>The number of bits used for the session key.</dd>
<dt><strong>signatureHashAlgorithm</strong> <em>algorithm</em></dt>
<dd>The signature hash algorithm.</dd>
<dt><strong>signature_type</strong> <em>type</em></dt>
<dd>The signature type value.</dd>
<dt><strong>verification</strong> <em>result</em></dt>
<dd>Certificate verification result.</dd>
<dt><strong>ca_names</strong> <em>list</em></dt>
<dd>List of the Certificate Authorities used to create the certificate.</dd>
<dt><strong>all</strong> <em>string</em></dt>
<dd>Dump of all certificate info.</dd>
<dt><strong>version</strong> <em>value</em></dt>
<dd>The certificate version.</dd>
<dt><strong>serialNumber</strong> <em>n</em></dt>
<dd>The serial number of the certificate as hex string.</dd>
<dt><strong>signature</strong> <em>algorithm</em></dt>
<dd>Cipher algorithm used for certificate signature.</dd>
<dt><strong>issuer</strong> <em>dn</em></dt>
<dd>The distinguished name (DN) of the certificate issuer.</dd>
<dt><strong>notBefore</strong> <em>date</em></dt>
<dd>The begin date for the validity of the certificate.</dd>
<dt><strong>notAfter</strong> <em>date</em></dt>
<dd>The expiration date for the certificate.</dd>
<dt><strong>subject</strong> <em>dn</em></dt>
<dd>The distinguished name (DN) of the certificate subject.
<dt><strong>issuerUniqueID</strong> <em>string</em></dt>
<dd>The issuer unique id.</dd>
<dt><strong>subjectUniqueID</strong> <em>string</em></dt>
<dd>The subject unique id.</dd>
<dt><strong>num_extensions</strong> <em>n</em></dt>
<dd>Number of certificate extensions.</dd>
<dt><strong>extensions</strong> <em>list</em></dt>
<dd>List of certificate extension names.</dd>
<dt><strong>authorityKeyIdentifier</strong> <em>string</em></dt>
<dd>(AKI) Key identifier of the Issuing CA certificate that signed
<dt><strong>subjectKeyIdentifier</strong> <em>string</em></dt>
<dd>(SKI) Hash of the public key inside the certificate. Used to
<dt><strong>subjectAltName</strong> <em>list</em></dt>
<dd>List of all of the alternative domain names, sub domains,
<dt><strong>ocsp</strong> <em>list</em></dt>
<dd>List of all OCSP URLs.</dd>
<dd>The PEM encoded certificate.</dd>
<dt><strong>signatureAlgorithm</strong> <em>algorithm</em></dt>
<dd>Cipher algorithm used for certificate signature.</dd>
<dt><strong>signatureValue</strong> <em>string</em></dt>
<dd>Certificate signature as hex string.</dd>
<dt><strong>signatureDigest</strong> <em>version</em></dt>
<dd>Certificate signing digest.</dd>
<dt><strong>publicKeyAlgorithm</strong> <em>algorithm</em></dt>
<dd>Certificate signature public key algorithm.</dd>
<dt><strong>publicKey</strong> <em>string</em></dt>
<dd>Certificate signature public key as hex string.</dd>
<dt><strong>bits</strong> <em>n</em></dt>
<dd>Number of bits used for certificate signature key</dd>
<dt><strong>self_signed</strong> <em>boolean</em></dt>
<dd>Is certificate signature self signed.</dd>
<dt><strong>sha1_hash</strong> <em>hash</em></dt>
<dd>The SHA1 hash of the certificate as hex string.</dd>
<dt><strong>sha256_hash</strong> <em>hash</em></dt>
<dd>The SHA256 hash of the certificate as hex string.</dd>
result is a list of key-value pairs describing the
connected peer.</dd>
<dt><strong>state</strong> <em>state</em></dt>
<dd>State of the connection.</dd>
<dt><strong>servername</strong> <em>name</em></dt>
<dd>The name of the connected to server.</dd>
<dt><strong>protocol</strong> <em>version</em></dt>
<dd>The protocol version used for the connection:
<dt><strong>renegotiation</strong> <em>state</em></dt>
<dd>Whether protocol renegotiation is supported or not.</dd>
<dt><strong>securitylevel</strong> <em>level</em></dt>
<dd>The security level used for selection of ciphers, key size, etc.</dd>
<dt><strong>session_reused</strong> <em>boolean</em></dt>
<dd>Whether the session has been reused or not.</dd>
<dt><strong>is_server</strong> <em>boolean</em></dt>
<dd>Whether the connection configured as a server or client (false).</dd>
<dt><strong>compression</strong> <em>mode</em></dt>
<dd>Compression method.</dd>
<dt><strong>expansion</strong> <em>mode</em></dt>
<dd>Expansion method.</dd>
<dt><strong>cipher</strong> <em>cipher</em></dt>
<dd>The current cipher in use for the connection.</dd>
<dt><strong>standard_name</strong> <em>name</em></dt>
<dd>The standard RFC name of cipher.</dd>
<dt><strong>bits</strong> <em>n</em></dt>
<dd>The number of processed bits used for cipher.</dd>
<dt><strong>secret_bits</strong> <em>n</em></dt>
<dd>The number of secret bits used for cipher.</dd>
<dt><strong>min_version</strong> <em>version</em></dt>
<dd>The minimum protocol version for cipher.</dd>
<dt><strong>id</strong> <em>id</em></dt>
<dd>The OpenSSL cipher id.</dd>
<dt><strong>description</strong> <em>string</em></dt>
<dd>A text description of the cipher.</dd>
<dt><strong>alpn</strong> <em>protocol</em></dt>
<dd>The protocol selected after Application-Layer Protocol
<dt><strong>resumable</strong> <em>boolean</em></dt>
<dd>Can the session be resumed or not.</dd>
<dt><strong>start_time</strong> <em>seconds</em></dt>
<dd>Time since session started in seconds since epoch.</dd>
<dt><strong>timeout</strong> <em>seconds</em></dt>
<dd>Max duration of session in seconds before time-out.</dd>
<dt><strong>lifetime</strong> <em>seconds</em></dt>
<dd>Session ticket lifetime hint in seconds.</dd>
<dt><strong>session_id</strong> <em>string</em></dt>
<dd>Unique session id for use in resuming the session.</dd>
<dt><strong>session_ticket</strong> <em>string</em></dt>
<dd>Unique session ticket for use in resuming the session.</dd>
<dt><strong>ticket_app_data</strong> <em>string</em></dt>
<dd>Unique session ticket application data.</dd>
<dt><strong>master_key</strong> <em>binary_string</em></dt>
<dd>Unique session master key.</dd>
<dt><strong>session_cache_mode</strong> <em>mode</em></dt>
<dd>Server cache mode (client, server, or both).</dd>
where protocol must be one of <b>ssl2, ssl3, tls1, tls1.1,
|
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<blockquote>
<dl>
<dt><strong>-command</strong> <em>callback</em></dt>
<dd>
Invokes the specified <em>callback</em> script at
several points during the OpenSSL handshake.
Except as indicated below, values returned from the
callback are ignored.
<!-- This form of callback is disabled.
<strong>error</strong> <em>channel message</em>
</dt>
<dd>
The <em>message</em> argument contains an error message generated
by the OpenSSL function
<code>ERR_reason_error_string()</code>.
</dd>
<br>
-->
<dt>
message processing.
message processing. Used to select an appropriate certificate to
</dd>
<br>
<dt>
<strong>info</strong> <em>channel major minor message</em>
</dt>
<dd>
This form of callback is invoked by the OpenSSL function
<code>SSL_CTX_set_info_callback()</code>.
<br>
The <em>major</em> and <em>minor</em> arguments are used to
represent the state information bitmask.
<dl>
<dt>Possible values for <em>major</em> are:</dt>
<dd><code>handshake, alert, connect, accept</code>.</dd>
<dt>Possible values for <em>minor</em> are:</dt>
<dd><code>start, done, read, write, loop, exit</code>.</dd>
</dl>
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.
names, so the right certificate can be used.
names, so the right certificate can be used. Called after hello
callback but before ALPN callback.
</dd>
<br>
certificate verification result and choose whether to continue or not.
<br>
The <em>depth</em> argument is an integer representing the
certificate chain verification results and choose whether to continue or not.
<ul>
<li>The <em>depth</em> argument is an integer representing the
current depth on the certificate chain, with
<code>0</code> as the subject certificate and higher values
denoting progressively more indirect issuer certificates.
<code>0</code> as the peer certificate and higher values going
up to the Certificate Authority (CA).</li>
<br>
The <em>cert</em> argument is a list of key-value pairs similar
<a href="#tls::status"><strong>tls::status</strong></a>.
<a href="#tls::status"><strong>tls::status</strong></a>.</li>
<br>
The <em>status</em> argument is an integer representing the
current validity of the certificate.
A value of <code>1</code> means the certificate is deemed valid.
A value of <code>1</code> means the certificate is deemed valid.</li>
<br>
The <em>error</em> argument supplies the message, if any, generated
by <code>X509_STORE_CTX_get_error()</code>.
<br>
</dl>
</dd>
<br>
<dt><strong>-password</strong> <em>callback</em></dt>
<dd>
Invokes the specified <em>callback</em> script when OpenSSL needs to
obtain a password. The callback should return a string which
represents the password to be used.
No arguments are appended to the script upon callback.
</dd>
|
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/* Callbacks */
/********************/
/*
*-------------------------------------------------------------------
*
* Eval Callback Command --
*
* Eval callback command and catch any errors
*
* Results:
* 0 = Command returned fail or eval returned TCL_ERROR
* 1 = Command returned success or eval returned TCL_OK
*
* Side effects:
* Evaluates callback command
*
*-------------------------------------------------------------------
*/
static int
EvalCallback(Tcl_Interp *interp, State *statePtr, Tcl_Obj *cmdPtr) {
int code, ok;
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
/* Eval callback with success for ok or return value 1, fail for error or return value 0 */
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code == TCL_OK) {
/* Check result for return value */
Tcl_Obj *result = Tcl_GetObjResult(interp);
if (result == NULL || Tcl_GetIntFromObj(interp, result, &ok) != TCL_OK) {
ok = 1;
}
} else {
/* Error - reject the certificate */
ok = 0;
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
}
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
return ok;
}
/*
*-------------------------------------------------------------------
*
* InfoCallback --
*
* monitors SSL connection process
*
* Results:
* None
*
|
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char *major; char *minor;
dprintf("Called");
if (statePtr->callback == (Tcl_Obj*)NULL)
return;
cmdPtr = Tcl_DuplicateObj(statePtr->callback);
if (where & (SSL_CB_LOOP|SSL_CB_EXIT)) {
if (where & SSL_CB_ALERT) {
Tcl_ListObjAppendElement(interp, cmdPtr,
Tcl_NewStringObj(SSL_state_string_long(ssl), -1));
} else if (where & SSL_CB_ALERT) {
const char *cp = (char *) SSL_alert_desc_string_long(ret);
Tcl_NewStringObj(cp, -1));
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
(void) Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
EvalCallback(interp, statePtr, cmdPtr);
Tcl_DecrRefCount(cmdPtr);
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
* Monitors SSL certificate validation process.
* This is called whenever a certificate is inspected
* or decided invalid.
* Monitors SSL certificate validation process. Used to control the
* behavior when the SSL_VERIFY_PEER flag is set. This is called
* whenever a certificate is inspected or decided invalid.
*
* Checks:
* certificate chain is checked starting with the deepest nesting level
* (the root CA certificate) and worked upward to the peer's certificate.
* All signatures are valid, current time is within first and last validity time.
* Check that the certificate is issued by the issuer certificate issuer.
* Check the revocation status for each certificate.
* Check the validity of the given CRL and the cert revocation status.
* Check the policies of all the certificates
*
* Args
* preverify_ok indicates whether the certificate verification passed (1) or not (0)
*
* Results:
* A callback bound to the socket may return one of:
* 0 - the certificate is deemed invalid
* 1 - the certificate is deemed valid
* 0 - the certificate is deemed invalid, send verification
* failure alert to peer, and terminate handshake.
* 1 - the certificate is deemed valid, continue with handshake.
* empty string - no change to certificate validation
*
* Side effects:
* The err field of the currently operative State is set
* to a string describing the SSL negotiation failure reason
*-------------------------------------------------------------------
*/
static int
VerifyCallback(int ok, X509_STORE_CTX *ctx) {
Tcl_Obj *cmdPtr, *result;
Tcl_Obj *cmdPtr;
char *string;
int length;
int code;
if (statePtr->callback == (Tcl_Obj*)NULL) {
if (statePtr->vcmd == (Tcl_Obj*)NULL) {
if (statePtr->vflags & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) {
return ok;
} else {
return 1;
}
}
/* Create command to eval from callback */
cmdPtr = Tcl_DuplicateObj(statePtr->callback);
cmdPtr = Tcl_DuplicateObj(statePtr->vcmd);
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("verify", -1));
Tcl_ListObjAppendElement(interp, cmdPtr,
Tcl_NewStringObj(Tcl_GetChannelName(statePtr->self), -1));
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewIntObj(depth));
Tcl_ListObjAppendElement(interp, cmdPtr, Tls_NewX509Obj(interp, cert));
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewIntObj(ok));
Tcl_ListObjAppendElement(interp, cmdPtr,
Tcl_NewStringObj((char*)X509_verify_cert_error_string(err), -1));
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
/* It got an error - reject the certificate. */
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
ok = 0;
} else {
result = Tcl_GetObjResult(interp);
string = Tcl_GetStringFromObj(result, &length);
/* An empty result leaves verification unchanged. */
if (string != NULL && length > 0) {
code = Tcl_GetIntFromObj(interp, result, &ok);
if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
ok = 0;
}
}
}
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
int code;
cmdPtr = Tcl_DuplicateObj(statePtr->callback);
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
}
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
|
| ︙ | | |
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|
strncpy(buf, ret, (size_t) size);
return (int)strlen(ret);
} else {
return -1;
}
}
/* Create command to eval from callback */
cmdPtr = Tcl_DuplicateObj(statePtr->password);
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
/* Eval callback and success for ok, abort for error, continue for continue */
Tcl_IncrRefCount(cmdPtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
|
| ︙ | | |
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static int
SessionCallback(const SSL *ssl, SSL_SESSION *session) {
State *statePtr = (State*)SSL_get_app_data((SSL *)ssl);
Tcl_Interp *interp = statePtr->interp;
Tcl_Obj *cmdPtr;
const unsigned char *ticket;
const unsigned char *session_id;
int code;
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
}
return 0;
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp); return 0;
* ALPN Callback for Servers --
* ALPN Callback for Servers and NPN Callback for Clients --
*
* Perform server-side protocol (http/1.1, h2, h3, etc.) selection for the
* incoming connection. Called after Hello and server callbacks
* Perform protocol (http/1.1, h2, h3, etc.) selection for the
* incoming connection. Called after Hello and server callbacks.
* Where 'out' is selected protocol and 'in' is the peer advertised list.
*
* Results:
* None
*
* Side effects:
* Calls callback (if defined)
*
|
| ︙ | | |
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|
State *statePtr = (State*)arg;
Tcl_Interp *interp = statePtr->interp;
Tcl_Obj *cmdPtr;
int code, res;
dprintf("Called");
if (statePtr->callback == (Tcl_Obj*)NULL) {
return SSL_TLSEXT_ERR_OK;
} else if (ssl == NULL) {
/* No overlap, so first client protocol used */
/* OPENSSL_NPN_NO_OVERLAP = No overlap, so use first item from client protocol list */
res = SSL_TLSEXT_ERR_NOACK;
}
if (statePtr->vcmd == (Tcl_Obj*)NULL) {
return res;
}
/* Create command to eval from callback */
cmdPtr = Tcl_DuplicateObj(statePtr->callback);
cmdPtr = Tcl_DuplicateObj(statePtr->vcmd);
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("alpn", -1));
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(*out, -1));
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
if ((code = EvalCallback(interp, statePtr, cmdPtr)) > 1) {
res = SSL_TLSEXT_ERR_NOACK;
} else if (code == 1) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
return res;
}
/*
*-------------------------------------------------------------------
*
* Advertise Protocols Callback for Next Protocol Negotiation (NPN) in ServerHello --
*
* called when a TLS server needs a list of supported protocols for Next
* Protocol Negotiation.
*
* Results:
* None
*
* Side effects:
*
* Return codes:
* SSL_TLSEXT_ERR_OK: NPN protocol selected. The connection continues.
* SSL_TLSEXT_ERR_NOACK: NPN protocol not selected. The connection continues.
*
*-------------------------------------------------------------------
*/
#ifdef USE_NPN
static int
NPNCallback(const SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg) {
State *statePtr = (State*)arg;
dprintf("Called");
if (ssl == NULL || arg == NULL) {
return SSL_TLSEXT_ERR_NOACK;
}
/* Set protocols list */
if (statePtr->protos != NULL) {
*out = statePtr->protos;
*outlen = statePtr->protos_len;
} else {
*out = NULL;
*outlen = 0;
return SSL_TLSEXT_ERR_NOACK;
}
return SSL_TLSEXT_ERR_OK;
}
#endif
/*
*-------------------------------------------------------------------
*
* SNI Callback for Servers --
*
* Perform server-side SNI hostname selection after receiving SNI header.
* Called after hello callback but before ALPN callback.
*
* Results:
* None
*
* Side effects:
* Calls callback (if defined)
*
* Return codes:
* SSL_TLSEXT_ERR_OK: SNI hostname is accepted. The connection continues.
* SSL_TLSEXT_ERR_ALERT_FATAL: SNI hostname is not accepted. The connection
* is aborted. Default for alert is SSL_AD_UNRECOGNIZED_NAME.
* SSL_TLSEXT_ERR_ALERT_WARNING: SNI hostname is not accepted, warning alert
* sent (not in TLSv1.3). The connection continues.
* sent (not supported in TLSv1.3). The connection continues.
* SSL_TLSEXT_ERR_NOACK: SNI hostname is not accepted and not acknowledged,
* e.g. if SNI has not been configured. The connection continues.
*
*-------------------------------------------------------------------
*/
static int
SNICallback(const SSL *ssl, int *alert, void *arg) {
State *statePtr = (State*)arg;
Tcl_Interp *interp = statePtr->interp;
Tcl_Obj *cmdPtr;
int code;
int code, res;
char *servername = NULL;
dprintf("Called");
if (statePtr->callback == (Tcl_Obj*)NULL) {
return SSL_TLSEXT_ERR_OK;
} else if (ssl == NULL) {
cmdPtr = Tcl_DuplicateObj(statePtr->callback);
cmdPtr = Tcl_DuplicateObj(statePtr->vcmd);
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("sni", -1));
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(servername , -1));
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
if ((code = EvalCallback(interp, statePtr, cmdPtr)) > 1) {
res = SSL_TLSEXT_ERR_ALERT_WARNING;
*alert = SSL_AD_UNRECOGNIZED_NAME; /* Not supported by TLS 1.3 */
} else if (code == 1) {
res = SSL_TLSEXT_ERR_OK;
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
return SSL_TLSEXT_ERR_OK;
* Hello Handshake Callback for Servers --
* ClientHello Handshake Callback for Servers --
*
* Used by server to examine the server name indication (SNI) extension
* provided by the client in order to select an appropriate certificate to
* present, and make other configuration adjustments relevant to that server
* name and its configuration. This includes swapping out the associated
* SSL_CTX pointer, modifying the server's list of permitted TLS versions,
* changing the server's cipher list in response to the client's cipher list, etc.
* Called before SNI and ALPN callbacks.
*
* Results:
* None
*
* Side effects:
* Calls callback (if defined)
*
* Return codes:
* SSL_CLIENT_HELLO_RETRY = suspend the handshake, and the handshake function will return immediately
* SSL_CLIENT_HELLO_ERROR = failure, terminate connection. Set alert to error code.
* SSL_CLIENT_HELLO_SUCCESS = success
* SSL_CLIENT_HELLO_RETRY: suspend the handshake, and the handshake function will return immediately
* SSL_CLIENT_HELLO_ERROR: failure, terminate connection. Set alert to error code.
* SSL_CLIENT_HELLO_SUCCESS: success
*
*-------------------------------------------------------------------
*/
static int
HelloCallback(const SSL *ssl, int *alert, void *arg) {
State *statePtr = (State*)arg;
Tcl_Interp *interp = statePtr->interp;
Tcl_Obj *cmdPtr;
int code;
int code, res;
const char *servername;
const unsigned char *p;
size_t len, remaining;
dprintf("Called");
if (statePtr->callback == (Tcl_Obj*)NULL) {
if (statePtr->vcmd == (Tcl_Obj*)NULL) {
return SSL_CLIENT_HELLO_SUCCESS;
} else if (ssl == NULL) {
} else if (ssl == NULL || arg == NULL) {
return SSL_CLIENT_HELLO_ERROR;
}
/* Get names */
if (!SSL_client_hello_get0_ext(ssl, TLSEXT_TYPE_server_name, &p, &remaining) || remaining <= 2) {
*alert = SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER;
return SSL_CLIENT_HELLO_ERROR;
}
/* Extract the length of the supplied list of names. */
len = (*(p++) << 8);
len += *(p++);
if (len + 2 != remaining) {
*alert = SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER;
return SSL_CLIENT_HELLO_ERROR;
}
remaining = len;
/* The list in practice only has a single element, so we only consider the first one. */
if (remaining == 0 || *p++ != TLSEXT_NAMETYPE_host_name) {
*alert = SSL_R_TLSV1_ALERT_INTERNAL_ERROR;
return SSL_CLIENT_HELLO_ERROR;
}
remaining--;
/* Now we can finally pull out the byte array with the actual hostname. */
if (remaining <= 2) {
*alert = SSL_R_TLSV1_ALERT_INTERNAL_ERROR;
return SSL_CLIENT_HELLO_ERROR;
}
len = (*(p++) << 8);
len += *(p++);
if (len + 2 > remaining) {
*alert = SSL_R_TLSV1_ALERT_INTERNAL_ERROR;
return SSL_CLIENT_HELLO_ERROR;
}
remaining = len;
servername = (const char *)p;
/* Create command to eval from callback */
cmdPtr = Tcl_DuplicateObj(statePtr->callback);
cmdPtr = Tcl_DuplicateObj(statePtr->vcmd);
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("hello", -1));
Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(servername, (int) len));
Tcl_Preserve((ClientData) interp);
Tcl_Preserve((ClientData) statePtr);
code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
if ((code = EvalCallback(interp, statePtr, cmdPtr)) > 1) {
res = SSL_CLIENT_HELLO_RETRY;
*alert = SSL_R_TLSV1_ALERT_USER_CANCELLED;
} else if (code == 1) {
res = SSL_CLIENT_HELLO_SUCCESS;
Tcl_BackgroundError(interp);
#else
Tcl_BackgroundException(interp, code);
#endif
Tcl_Release((ClientData) statePtr);
Tcl_Release((ClientData) interp);
return SSL_CLIENT_HELLO_SUCCESS;
|
| ︙ | | |
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|
static int
ImportObjCmd(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 */
SSL_CTX *ctx = NULL;
Tcl_Obj *script = NULL;
Tcl_Obj *password = NULL;
Tcl_Obj *vcmd = NULL;
Tcl_DString upperChannelTranslation, upperChannelBlocking, upperChannelEncoding, upperChannelEOFChar;
int idx, len;
int flags = TLS_TCL_INIT;
int server = 0; /* is connection incoming or outgoing? */
char *keyfile = NULL;
char *certfile = NULL;
unsigned char *key = NULL;
|
| ︙ | | |
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|
for (idx = 2; idx < objc; idx++) {
char *opt = Tcl_GetStringFromObj(objv[idx], NULL);
if (opt[0] != '-')
break;
OPTOBJ("-alpn", alpn);
OPTSTR("-cadir", CAdir);
OPTSTR("-cafile", CAfile);
OPTSTR("-certfile", certfile);
OPTSTR("-cipher", ciphers);
OPTSTR("-ciphers", ciphers);
OPTSTR("-ciphersuites", ciphersuites);
OPTOBJ("-command", script);
OPTSTR("-dhparams", DHparams);
OPTSTR("-keyfile", keyfile);
OPTSTR("-model", model);
OPTOBJ("-password", password);
OPTBOOL("-post_handshake", post_handshake);
OPTBOOL("-require", require);
OPTBOOL("-request", request);
OPTINT("-securitylevel", level);
OPTBOOL("-server", server);
OPTSTR("-servername", servername);
OPTSTR("-session_id", session_id);
OPTOBJ("-alpn", alpn);
OPTBAD("option", "-alpn, -cadir, -cafile, -cert, -certfile, -cipher, -ciphersuites, -command, -dhparams, -key, -keyfile, -model, -password, -require, -request, -securitylevel, -server, -servername, -session_id, -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, -securitylevel, -server, -servername, -session_id, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, -tls1.3, or -validatecommand");
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 (request && post_handshake) verify |= SSL_VERIFY_POST_HANDSHAKE;
if (verify == 0) verify = SSL_VERIFY_NONE;
|
| ︙ | | |
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|
if (password) {
(void) Tcl_GetStringFromObj(password, &len);
if (len) {
statePtr->password = password;
Tcl_IncrRefCount(statePtr->password);
}
}
/* allocate validate command */
if (vcmd) {
(void) Tcl_GetStringFromObj(vcmd, &len);
if (len) {
statePtr->vcmd = vcmd;
Tcl_IncrRefCount(statePtr->vcmd);
}
}
if (model != NULL) {
int mode;
/* Get the "model" context */
chan = Tcl_GetChannel(interp, model, &mode);
if (chan == (Tcl_Channel) NULL) {
Tls_Free((char *) statePtr);
|
| ︙ | | |
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|
Tcl_AppendResult(interp, "couldn't construct ssl session: ", REASON(), (char *) NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
/* Set host server name */
if (servername) {
/* Sets the server name indication (SNI) ClientHello extension */
/* Sets the server name indication (SNI) in ClientHello extension */
if (!SSL_set_tlsext_host_name(statePtr->ssl, servername) && require) {
Tcl_AppendResult(interp, "setting TLS host name extension failed", (char *) NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
/* Configure server host name checks in the SSL client. Set DNS hostname to
|
| ︙ | | |
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|
Tcl_AppendResult(interp, "Resume session id ", session_id, " failed", (char *) NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
}
if (alpn) {
/* Convert a Tcl list into a protocol-list in wire-format */
/* Convert a TCL list into a protocol-list in wire-format */
unsigned char *protos, *p;
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);
|
| ︙ | | |
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|
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|
}
/*
* SSL Callbacks
*/
SSL_set_app_data(statePtr->ssl, (void *)statePtr); /* point back to us */
SSL_set_verify(statePtr->ssl, verify, VerifyCallback);
SSL_CTX_set_info_callback(statePtr->ctx, InfoCallback);
SSL_set_info_callback(statePtr->ssl, InfoCallback);
/* Create Tcl_Channel BIO Handler */
statePtr->p_bio = BIO_new_tcl(statePtr, BIO_NOCLOSE);
statePtr->bio = BIO_new(BIO_f_ssl());
if (server) {
/* Server callbacks */
SSL_CTX_set_alpn_select_cb(statePtr->ctx, ALPNCallback, (void *)statePtr);
|
| ︙ | | |
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|
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|
SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
}
SSL_CTX_set_app_data(ctx, (void*)interp); /* remember the interpreter */
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 */
SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY); /* handle new handshakes in background. On by default in OpenSSL 1.1.1. */
#endif
SSL_CTX_sess_set_cache_size(ctx, 128);
/* Set user defined ciphers, cipher suites, and security level */
if ((ciphers != NULL) && !SSL_CTX_set_cipher_list(ctx, ciphers)) {
Tcl_AppendResult(interp, "Set ciphers failed: No valid ciphers", (char *) NULL);
SSL_CTX_free(ctx);
|
| ︙ | | |
1848
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|
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("sbits", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(SSL_get_cipher_bits(statePtr->ssl, NULL)));
ciphers = (char*)SSL_get_cipher(statePtr->ssl);
if ((ciphers != NULL) && (strcmp(ciphers, "(NONE)") != 0)) {
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("cipher", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_cipher(statePtr->ssl), -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(ciphers, -1));
}
/* Verify the X509 certificate presented by the peer */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("verification", -1));
Tcl_ListObjAppendElement(interp, objPtr,
Tcl_NewStringObj(X509_verify_cert_error_string(SSL_get_verify_result(statePtr->ssl)), -1));
|
| ︙ | | |
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
|
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
|
+
+
+
+
+
+
+
|
const unsigned char *session_id;
char buffer[SSL_MAX_MASTER_KEY_LENGTH];
/* Report the selected protocol as a result of the ALPN negotiation */
SSL_SESSION_get0_alpn_selected(session, &proto, &len2);
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("alpn", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *)proto, (int) len2));
/* Report the selected protocol as a result of the NPN negotiation */
#ifdef USE_NPN
SSL_get0_next_proto_negotiated(ssl, &proto, &ulen);
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("npn", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *)proto, (int) ulen));
#endif
/* Resumable session */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("resumable", -1));
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(SSL_SESSION_is_resumable(session)));
/* Session start time (seconds since epoch) */
Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("start_time", -1));
|
| ︙ | | |
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
|
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
|
+
+
+
+
|
if (statePtr->callback) {
Tcl_DecrRefCount(statePtr->callback);
statePtr->callback = NULL;
}
if (statePtr->password) {
Tcl_DecrRefCount(statePtr->password);
statePtr->password = NULL;
}
if (statePtr->vcmd) {
Tcl_DecrRefCount(statePtr->vcmd);
statePtr->vcmd = NULL;
}
dprintf("Returning");
}
/*
*-------------------------------------------------------------------
|
| ︙ | | |