Diff

Differences From Artifact [62e132dc18]:

To Artifact [d5754546f3]:


23
24
25
26
27
28
29



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50


51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
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







+
+
+



















-
-
+
+
-
-











-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-







 */

#include "tlsInt.h"
#include "tclOpts.h"
#include "tlsUuid.h"
#include <stdio.h>
#include <stdlib.h>
#include <openssl/ssl.h>
#include <openssl/crypto.h>
#include <openssl/opensslconf.h>
#include <openssl/rsa.h>
#include <openssl/safestack.h>

/* Min OpenSSL version */
#if OPENSSL_VERSION_NUMBER < 0x10101000L
#error "Only OpenSSL v1.1.1 or later is supported"
#endif


/*
 * Forward declarations
 */

#define F2N(key, dsp) \
	(((key) == NULL) ? (char *) NULL : \
		Tcl_TranslateFileName(interp, (key), (dsp)))

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 *CApath, char *CAfile,
		char *ciphers, char *ciphersuites, int level, char *DHparams);
		Tcl_Size key_asn1_len, Tcl_Size cert_asn1_len, char *CApath, char *CAstore,
		char *CAfile, char *ciphers, char *ciphersuites, int level, 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
#define TLS_PROTO_TLS1_2	0x10
#define TLS_PROTO_TLS1_3	0x20
#define ENABLED(flag, mask)	(((flag) & (mask)) == (mask))

#define SSLKEYLOGFILE		"SSLKEYLOGFILE"

/*
 * Thread-Safe TLS Code
 */

#ifdef TCL_THREADS
#define OPENSSL_THREAD_DEFINES
#include <openssl/opensslconf.h>

#ifdef OPENSSL_THREADS
#include <openssl/crypto.h>
#include <openssl/ssl.h>

/*
 * Threaded operation requires locking callbacks
 * Based from /crypto/cryptlib.c of OpenSSL and NSOpenSSL.
 */

static Tcl_Mutex *locks = NULL;
static int locksCount = 0;
static Tcl_Mutex init_mx;
#endif /* OPENSSL_THREADS */
#endif /* TCL_THREADS */


/********************/
/* Callbacks        */
/********************/

/*
 *-------------------------------------------------------------------
156
157
158
159
160
161
162
163

164
165
166
167

168

169
170
171
172
173
174
175
134
135
136
137
138
139
140

141
142
143
144

145
146
147
148
149
150
151
152
153
154







-
+



-
+

+







 *-------------------------------------------------------------------
 */
static void
InfoCallback(const SSL *ssl, int where, int ret) {
    State *statePtr = (State*)SSL_get_app_data((SSL *)ssl);
    Tcl_Interp *interp	= statePtr->interp;
    Tcl_Obj *cmdPtr;
    char *major; char *minor;
    const char *major, *minor;

    dprintf("Called");

    if (statePtr->callback == (Tcl_Obj*)NULL)
    if (statePtr->callback == (Tcl_Obj*)NULL) {
	return;
    }

    if (where & SSL_CB_HANDSHAKE_START) {
	major = "handshake";
	minor = "start";
    } else if (where & SSL_CB_HANDSHAKE_DONE) {
	major = "handshake";
	minor = "done";
235
236
237
238
239
240
241
242

243

244
245
246
247
248
249
250
214
215
216
217
218
219
220

221
222
223
224
225
226
227
228
229
230







-
+

+







    char *ver, *type;
    BIO *bio;
    char buffer[15000];
    buffer[0] = 0;

    dprintf("Called");

    if (statePtr->callback == (Tcl_Obj*)NULL)
    if (statePtr->callback == (Tcl_Obj*)NULL) {
	return;
    }

    switch(version) {
#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(NO_SSL2) && !defined(OPENSSL_NO_SSL2)
    case SSL2_VERSION:
	ver = "SSLv2";
	break;
#endif
307
308
309
310
311
312
313


314
315
316
317
318
319
320
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302







+
+







	SSL_trace(write_p, version, content_type, buf, len, ssl, (void *)bio);
	n = BIO_read(bio, buffer, BIO_pending(bio) < 15000 ? BIO_pending(bio) : 14999);
	n = (n<0) ? 0 : n;
	buffer[n] = 0;
	(void)BIO_flush(bio);
	BIO_free(bio);
   }

    dprintf("Message direction=%d, ver=%s, type=%s, message=%s", write_p, ver, type, &buffer[0]);

    /* Create command to eval with fn, chan, direction, version, type, and message args */
    cmdPtr = Tcl_DuplicateObj(statePtr->callback);
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("message", -1));
    Tcl_ListObjAppendElement(interp, cmdPtr,
	    Tcl_NewStringObj(Tcl_GetChannelName(statePtr->self), -1));
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(write_p ? "Sent" : "Received", -1));
384
385
386
387
388
389
390
391

392
393
394
395
396
397
398
399

400
401
402
403
404
405


406
407
408
409
410
411
412
366
367
368
369
370
371
372

373
374
375
376
377
378
379
380

381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396







-
+







-
+






+
+







	} else {
	    return 1;
	}
    } else if (cert == NULL || ssl == NULL) {
	return 0;
    }

    dprintf("VerifyCallback: eval callback");
    dprintf("VerifyCallback: create callback command");

    /* Create command to eval with fn, chan, depth, cert info list, status, and error args */
    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, Tls_NewX509Obj(interp, cert, 0));
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewIntObj(ok));
    Tcl_ListObjAppendElement(interp, cmdPtr,
	Tcl_NewStringObj((char*)X509_verify_cert_error_string(err), -1));

    /* Prevent I/O while callback is in progress */
    /* statePtr->flags |= TLS_TCL_CALLBACK; */

    dprintf("VerifyCallback: eval callback");

    /* Eval callback command */
    Tcl_IncrRefCount(cmdPtr);
    ok = EvalCallback(interp, statePtr, cmdPtr);
    Tcl_DecrRefCount(cmdPtr);

    dprintf("VerifyCallback: command result = %d", ok);
425
426
427
428
429
430
431
432

433
434
435
436
437
438

439
440

441



442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460


461
462
463
464
465
466
467
409
410
411
412
413
414
415

416
417
418
419
420
421

422
423

424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456







-
+





-
+

-
+

+
+
+



















+
+







 * Side effects:
 *	The err field of the currently operative State is set
 *	  to a string describing the SSL negotiation failure reason
 *
 *-------------------------------------------------------------------
 */
void
Tls_Error(State *statePtr, char *msg) {
Tls_Error(State *statePtr, const char *msg) {
    Tcl_Interp *interp	= statePtr->interp;
    Tcl_Obj *cmdPtr, *listPtr;
    unsigned long err;
    statePtr->err = msg;

    dprintf("Called");
    dprintf("Called with message %s", msg);

    if (statePtr->callback == (Tcl_Obj*)NULL)
    if (statePtr->callback == (Tcl_Obj*)NULL) {
	return;
    }

    dprintf("Tls_Error: create callback command");

    /* Create command to eval with fn, chan, and message args */
    cmdPtr = Tcl_DuplicateObj(statePtr->callback);
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("error", -1));
    Tcl_ListObjAppendElement(interp, cmdPtr,
	    Tcl_NewStringObj(Tcl_GetChannelName(statePtr->self), -1));
    if (msg != NULL) {
	Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(msg, -1));

    } else if ((msg = Tcl_GetString(Tcl_GetObjResult(interp))) != NULL) {
	Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(msg, -1));

    } else {
	listPtr = Tcl_NewListObj(0, NULL);
	while ((err = ERR_get_error()) != 0) {
	    Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(ERR_reason_error_string(err), -1));
	}
	Tcl_ListObjAppendElement(interp, cmdPtr, listPtr);
    }

    dprintf("Tls_Error: eval callback");

    /* Eval callback command */
    Tcl_IncrRefCount(cmdPtr);
    EvalCallback(interp, statePtr, cmdPtr);
    Tcl_DecrRefCount(cmdPtr);
}

530
531
532
533
534
535
536


537
538
539
540
541
542


543
544
545
546
547
548
549
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542







+
+






+
+







	    strncpy(buf, ret, (size_t) len);
	    buf[len] = '\0';
	    return (int) len;
	} else {
	    return -1;
	}
    }

    dprintf("PasswordCallback: create callback command");

    /* Create command to eval with fn, rwflag, and size args */
    cmdPtr = Tcl_DuplicateObj(statePtr->password);
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj("password", -1));
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewIntObj(rwflag));
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewIntObj(size));

    dprintf("PasswordCallback: eval callback");

    Tcl_Preserve((ClientData) interp);
    Tcl_Preserve((ClientData) statePtr);

    /* Eval callback command */
    Tcl_IncrRefCount(cmdPtr);
    code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
1270
1271
1272
1273
1274
1275
1276

1277
1278
1279
1280
1281
1282
1283
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277







+







    Tcl_Size key_len		= 0;
    unsigned char *cert		= NULL;
    Tcl_Size cert_len		= 0;
    char *ciphers		= NULL;
    char *ciphersuites		= NULL;
    char *CAfile		= NULL;
    char *CApath		= NULL;
    char *CAstore		= NULL;
    char *DHparams		= NULL;
    char *model			= NULL;
    char *servername		= NULL;	/* hostname for Server Name Indication */
    char *session_id		= NULL;
    Tcl_Obj *alpn		= NULL;
    int ssl2 = 0, ssl3 = 0;
    int tls1 = 1, tls1_1 = 1, tls1_2 = 1, tls1_3 = 1;
1320
1321
1322
1323
1324
1325
1326

1327
1328
1329
1330
1331
1332
1333
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328







+








	if (opt[0] != '-')
	    break;

	OPTOBJ("-alpn", alpn);
	OPTSTR("-cadir", CApath);
	OPTSTR("-cafile", CAfile);
	OPTSTR("-castore", CAstore);
	OPTBYTE("-cert", cert, cert_len);
	OPTSTR("-certfile", certfile);
	OPTSTR("-cipher", ciphers);
	OPTSTR("-ciphers", ciphers);
	OPTSTR("-ciphersuites", ciphersuites);
	OPTOBJ("-command", script);
	OPTSTR("-dhparams", DHparams);
1347
1348
1349
1350
1351
1352
1353
1354

1355
1356
1357
1358
1359
1360
1361
1342
1343
1344
1345
1346
1347
1348

1349
1350
1351
1352
1353
1354
1355
1356







-
+







	OPTBOOL("-tls1", tls1);
	OPTBOOL("-tls1.1", tls1_1);
	OPTBOOL("-tls1.2", tls1_2);
	OPTBOOL("-tls1.3", tls1_3);
	OPTOBJ("-validatecommand", vcmd);
	OPTOBJ("-vcmd", vcmd);

	OPTBAD("option", "-alpn, -cadir, -cafile, -cert, -certfile, -cipher, -ciphersuites, -command, -dhparams, -key, -keyfile, -model, -password, -post_handshake, -request, -require, -security_level, -server, -servername, -session_id, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, -tls1.3, or -validatecommand");
	OPTBAD("option", "-alpn, -cadir, -cafile, -castore, -cert, -certfile, -cipher, -ciphersuites, -command, -dhparams, -key, -keyfile, -model, -password, -post_handshake, -request, -require, -security_level, -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;
1372
1373
1374
1375
1376
1377
1378

1379
1380
1381
1382
1383
1384
1385
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381







+







    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 (CApath && !*CApath)	        CApath	        = NULL;
    if (CAstore && !*CAstore)	        CAstore	        = NULL;
    if (DHparams && !*DHparams)	        DHparams        = NULL;

    /* new SSL state */
    statePtr		= (State *) ckalloc((unsigned) sizeof(State));
    memset(statePtr, 0, sizeof(State));

    statePtr->flags	= flags;
1432
1433
1434
1435
1436
1437
1438
1439
1440


1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472




1473
1474
1475
1476
1477
1478
1479
1428
1429
1430
1431
1432
1433
1434


1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446


1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477







-
-
+
+










-
-




















+
+
+
+







		"\": not a TLS channel", (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "CHANNEL", "INVALID", (char *) NULL);
	    Tls_Free((tls_free_type *) statePtr);
	    return TCL_ERROR;
	}
	ctx = ((State *)Tcl_GetChannelInstanceData(chan))->ctx;
    } else {
	if ((ctx = CTX_Init(statePtr, server, proto, keyfile, certfile, key, cert, (int) key_len,
	    (int) cert_len, CApath, CAfile, ciphers, ciphersuites, level, DHparams)) == NULL) {
	if ((ctx = CTX_Init(statePtr, server, proto, keyfile, certfile, key, cert, key_len,
	    cert_len, CApath, CAstore, CAfile, ciphers, ciphersuites, level, DHparams)) == NULL) {
	    Tls_Free((tls_free_type *) statePtr);
	    return TCL_ERROR;
	}
    }

    statePtr->ctx = ctx;

    /*
     * We need to make sure that the channel works in binary (for the
     * encryption not to get goofed up).
     * We only want to adjust the buffering in pre-v2 channels, where
     * each channel in the stack maintained its own buffers.
     */
    Tcl_DStringInit(&upperChannelTranslation);
    Tcl_DStringInit(&upperChannelBlocking);
    Tcl_DStringInit(&upperChannelEOFChar);
    Tcl_DStringInit(&upperChannelEncoding);
    Tcl_GetChannelOption(interp, chan, "-eofchar", &upperChannelEOFChar);
    Tcl_GetChannelOption(interp, chan, "-encoding", &upperChannelEncoding);
    Tcl_GetChannelOption(interp, chan, "-translation", &upperChannelTranslation);
    Tcl_GetChannelOption(interp, chan, "-blocking", &upperChannelBlocking);
    Tcl_SetChannelOption(interp, chan, "-translation", "binary");
    Tcl_SetChannelOption(interp, chan, "-blocking", "true");
    dprintf("Consuming Tcl channel %s", Tcl_GetChannelName(chan));
    statePtr->self = Tcl_StackChannel(interp, Tls_ChannelType(), (ClientData) statePtr,
	(TCL_READABLE | TCL_WRITABLE), chan);
    dprintf("Created channel named %s", Tcl_GetChannelName(statePtr->self));
    if (statePtr->self == (Tcl_Channel) NULL) {
	/*
	 * No use of Tcl_EventuallyFree because no possible Tcl_Preserve.
	 */
	Tls_Free((tls_free_type *) statePtr);
	Tcl_DStringFree(&upperChannelTranslation);
	Tcl_DStringFree(&upperChannelEncoding);
	Tcl_DStringFree(&upperChannelEOFChar);
	Tcl_DStringFree(&upperChannelBlocking);
	return TCL_ERROR;
    }

    Tcl_SetChannelOption(interp, statePtr->self, "-translation", Tcl_DStringValue(&upperChannelTranslation));
    Tcl_SetChannelOption(interp, statePtr->self, "-encoding", Tcl_DStringValue(&upperChannelEncoding));
    Tcl_SetChannelOption(interp, statePtr->self, "-eofchar", Tcl_DStringValue(&upperChannelEOFChar));
    Tcl_SetChannelOption(interp, statePtr->self, "-blocking", Tcl_DStringValue(&upperChannelBlocking));
1583
1584
1585
1586
1587
1588
1589

1590
1591
1592
1593
1594
1595
1596
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595







+







    }

    /*
     * SSL Callbacks
     */
    SSL_set_app_data(statePtr->ssl, (void *)statePtr);	/* point back to us */
    SSL_set_verify(statePtr->ssl, verify, VerifyCallback);
    /*SSL_set_verify_depth(SSL_set_verify_depth, 0);*/
    SSL_set_info_callback(statePtr->ssl, InfoCallback);

    /* Callback for observing protocol messages */
#ifndef OPENSSL_NO_SSL_TRACE
    /* void SSL_CTX_set_msg_callback_arg(statePtr->ctx, (void *)statePtr);
    void SSL_CTX_set_msg_callback(statePtr->ctx, MessageCallback); */
    SSL_set_msg_callback_arg(statePtr->ssl, (void *)statePtr);
1673
1674
1675
1676
1677
1678
1679
1680



1681
1682
1683
1684
1685
1686
1687
1688
1689

1690
1691
1692
1693
1694
1695
1696

1697
1698


1699
1700

1701
1702
1703
1704

















1705
1706







1707
1708





1709

1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728


1729
1730
1731
1732
1733
1734
1735
1672
1673
1674
1675
1676
1677
1678

1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700

1701
1702
1703

1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725


1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739

1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757


1758
1759
1760
1761
1762
1763
1764
1765
1766







-
+
+
+









+







+

-
+
+

-
+




+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
+
+
+
+
+


+
+
+
+
+
-
+

















-
-
+
+







 * Side effects:
 *	May modify the behavior of an IO channel.
 *
 *-------------------------------------------------------------------
 */
static int
UnimportObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
    Tcl_Channel chan;		/* The channel to set a mode on. */
    Tcl_Channel chan, child;	/* The stacked and underlying channels */
    Tcl_DString upperChannelTranslation, upperChannelBlocking, upperChannelEncoding, upperChannelEOFChar;
    int res = TCL_OK;
    (void) clientData;

    dprintf("Called");

    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "channel");
	return TCL_ERROR;
    }

    /* Validate channel name */
    chan = Tcl_GetChannel(interp, Tcl_GetString(objv[1]), NULL);
    if (chan == (Tcl_Channel) NULL) {
	return TCL_ERROR;
    }

    /* Make sure to operate on the topmost channel */
    chan = Tcl_GetTopChannel(chan);
    child = Tcl_GetStackedChannel(chan);

    if (Tcl_GetChannelType(chan) != Tls_ChannelType()) {
    /* Verify is a stacked channel */
    if (child == NULL) {
	Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan),
		"\": not a TLS channel", (char *) NULL);
		"\": not a stacked channel", (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "UNIMPORT", "CHANNEL", "INVALID", (char *) NULL);
	return TCL_ERROR;
    }

    /* Flush any pending data */
    if (Tcl_Flush(chan) != TCL_OK) {
	return TCL_ERROR;
    }

    Tcl_DStringInit(&upperChannelTranslation);
    Tcl_DStringInit(&upperChannelBlocking);
    Tcl_DStringInit(&upperChannelEOFChar);
    Tcl_DStringInit(&upperChannelEncoding);

    /* Get current config - EOL translation, encoding and buffering options are shared between all channels in the stack */
    Tcl_GetChannelOption(interp, chan, "-blocking", &upperChannelBlocking);
    Tcl_GetChannelOption(interp, chan, "-encoding", &upperChannelEncoding);
    Tcl_GetChannelOption(interp, chan, "-eofchar", &upperChannelEOFChar);
    Tcl_GetChannelOption(interp, chan, "-translation", &upperChannelTranslation);

    /* Unstack the channel and restore underlying channel config */
    if (Tcl_UnstackChannel(interp, chan) == TCL_ERROR) {
	return TCL_ERROR;
    if (Tcl_UnstackChannel(interp, chan) == TCL_OK) {
	Tcl_SetChannelOption(interp, child, "-encoding", Tcl_DStringValue(&upperChannelEncoding));
	Tcl_SetChannelOption(interp, child, "-eofchar", Tcl_DStringValue(&upperChannelEOFChar));
	Tcl_SetChannelOption(interp, child, "-translation", Tcl_DStringValue(&upperChannelTranslation));
	Tcl_SetChannelOption(interp, child, "-blocking", Tcl_DStringValue(&upperChannelBlocking));
    } else {
	res = TCL_ERROR;
    }

    /* Clean-up */
    Tcl_DStringFree(&upperChannelTranslation);
    Tcl_DStringFree(&upperChannelEncoding);
    Tcl_DStringFree(&upperChannelEOFChar);
    Tcl_DStringFree(&upperChannelBlocking);
    return TCL_OK;
    return res;
}

/*
 *-------------------------------------------------------------------
 *
 * CTX_Init -- construct a SSL_CTX instance
 *
 * Results:
 *	A valid SSL_CTX instance or NULL.
 *
 * Side effects:
 *	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 *CApath,
    char *CAfile, char *ciphers, char *ciphersuites, int level, char *DHparams) {
    unsigned char *key, unsigned char *cert, Tcl_Size key_len, Tcl_Size cert_len, char *CApath,
    char *CAstore, char *CAfile, char *ciphers, char *ciphersuites, int level, char *DHparams) {
    Tcl_Interp *interp = statePtr->interp;
    SSL_CTX *ctx = NULL;
    Tcl_DString ds;
    int off = 0, abort = 0;
    int load_private_key;
    const SSL_METHOD *method;

1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875












1876
1877
1878
1879
1880
1881
1882
1894
1895
1896
1897
1898
1899
1900






1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919







-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+







    }

#if OPENSSL_VERSION_NUMBER < 0x10100000L
    OpenSSL_add_all_algorithms(); /* Load ciphers and digests */
#endif

    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, SSL_OP_NO_COMPRESSION);	/* disable compression even if supported */
    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. On by default in OpenSSL 1.1.1. */
#endif
    SSL_CTX_set_options(ctx, SSL_OP_ALL);	/* Enable all SSL bug workarounds */
    SSL_CTX_set_options(ctx, SSL_OP_NO_COMPRESSION);	/* Disable compression even if supported */
    SSL_CTX_set_options(ctx, off);		/* Disable specified protocol versions */

    /* Allow writes to report success when less than all records have been written */
    SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);

    /* Disable attempts to try to process the next record instead of returning after a
       non-app record. Avoids hangs in blocking mode, when using SSL_read() and a
       non-application record was sent and no application data was sent. */
    SSL_CTX_clear_mode(ctx, SSL_MODE_AUTO_RETRY);

    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);
	return NULL;
1953
1954
1955
1956
1957
1958
1959
1960

1961
1962
1963
1964
1965
1966
1967
1990
1991
1992
1993
1994
1995
1996

1997
1998
1999
2000
2001
2002
2003
2004







-
+







	    SSL_CTX_free(ctx);
	    return NULL;
	}
	Tcl_DStringFree(&ds);

    } else if (cert != NULL) {
	load_private_key = 1;
	if (SSL_CTX_use_certificate_ASN1(ctx, cert_len, cert) <= 0) {
	if (SSL_CTX_use_certificate_ASN1(ctx, (int) cert_len, cert) <= 0) {
	    Tcl_AppendResult(interp, "unable to set certificate: ",
		GET_ERR_REASON(), (char *) NULL);
	    SSL_CTX_free(ctx);
	    return NULL;
	}
    } else {
	certfile = (char*)X509_get_default_cert_file();
1996
1997
1998
1999
2000
2001
2002
2003

2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023






2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035




2036

2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051

2052
2053







2054








2055
2056
2057


2058
2059



2060

2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080

2081
2082
2083
2084
2085
2086
2087
2033
2034
2035
2036
2037
2038
2039

2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057



2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079

2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105

2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123

2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143

2144
2145
2146
2147
2148
2149
2150
2151







-
+

















-
-
-
+
+
+
+
+
+












+
+
+
+
-
+















+


+
+
+
+
+
+
+
-
+
+
+
+
+
+
+
+



+
+


+
+
+
-
+



















-
+







		    GET_ERR_REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		return NULL;
	    }
	    Tcl_DStringFree(&ds);

	} else if (key != NULL) {
	    if (SSL_CTX_use_PrivateKey_ASN1(EVP_PKEY_RSA, ctx, key,key_len) <= 0) {
	    if (SSL_CTX_use_PrivateKey_ASN1(EVP_PKEY_RSA, ctx, key, (int) key_len) <= 0) {
		/* flush the passphrase which might be left in the result */
		Tcl_SetResult(interp, NULL, TCL_STATIC);
		Tcl_AppendResult(interp, "unable to set public key: ", GET_ERR_REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		return NULL;
	    }
	}
	/* Now we know that a key and cert have been set against
	 * the SSL context */
	if (!SSL_CTX_check_private_key(ctx)) {
	    Tcl_AppendResult(interp, "private key does not match the certificate public key",
			     (char *) NULL);
	    SSL_CTX_free(ctx);
	    return NULL;
	}
    }

    /* Set to use default location and file for Certificate Authority (CA) certificates. The
     * verify path and store can be overridden by the SSL_CERT_DIR env var. The verify file can
     * be overridden by the SSL_CERT_FILE env var. */
    /* Set to use the default location and file for Certificate Authority (CA) certificates.
     * The default CA certificates directory is called certs in the default OpenSSL
     * directory. It contains the CA certificates in PEM format, with one certificate per
     * file. The verify path and store can be overridden by the SSL_CERT_DIR env var. The
     * default CA certificates file is called cert.pem in the default OpenSSL directory.
     * The verify file can be overridden by the SSL_CERT_FILE env var. */
    if (!SSL_CTX_set_default_verify_paths(ctx)) {
	abort++;
    }

    /* Overrides for the CA verify path and file */
    {
#if OPENSSL_VERSION_NUMBER < 0x30000000L
	if (CApath != NULL || CAfile != NULL) {
	    Tcl_DString ds1;
	    Tcl_DStringInit(&ds1);

	    if (!SSL_CTX_load_verify_locations(ctx, F2N(CAfile, &ds), F2N(CApath, &ds1))) {
		Tcl_AppendResult(interp, GET_ERR_REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		Tcl_DStringFree(&ds);
		Tcl_DStringFree(&ds1);
		abort++;
		return NULL;
	    }
	    Tcl_DStringFree(&ds);
	    Tcl_DStringFree(&ds1);

	    /* Set list of CAs to send to client when requesting a client certificate */
	    /* https://sourceforge.net/p/tls/bugs/57/ */
	    /* XXX:TODO: Let the user supply values here instead of something that exists on the filesystem */
	    STACK_OF(X509_NAME) *certNames = SSL_load_client_CA_file(F2N(CAfile, &ds));
	    if (certNames != NULL) {
		SSL_CTX_set_client_CA_list(ctx, certNames);
	    }
	    Tcl_DStringFree(&ds);
	}

#else
	/* Set directory containing CA certificates in PEM format. */
	if (CApath != NULL) {
	    if (!SSL_CTX_load_verify_dir(ctx, F2N(CApath, &ds))) {
		Tcl_AppendResult(interp, GET_ERR_REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		Tcl_DStringFree(&ds);
		return NULL;
	    }
	    Tcl_DStringFree(&ds);
	}
		abort++;
	
	/* Set URI for to a store, which may be a single container or a catalog of containers. */
	if (CAstore != NULL) {
	    if (!SSL_CTX_load_verify_store(ctx, F2N(CAstore, &ds))) {
		Tcl_AppendResult(interp, GET_ERR_REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		Tcl_DStringFree(&ds);
		return NULL;
	    }
	    Tcl_DStringFree(&ds);
	}
	
	/* Set file of CA certificates in PEM format.  */
	if (CAfile != NULL) {
	    if (!SSL_CTX_load_verify_file(ctx, F2N(CAfile, &ds))) {
		Tcl_AppendResult(interp, GET_ERR_REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		Tcl_DStringFree(&ds);
		abort++;
		return NULL;
	    }
	    Tcl_DStringFree(&ds);

	    /* Set list of CAs to send to client when requesting a client certificate */
	    STACK_OF(X509_NAME) *certNames = SSL_load_client_CA_file(F2N(CAfile, &ds));
	    if (certNames != NULL) {
		SSL_CTX_set_client_CA_list(ctx, certNames);
	    }
	    Tcl_DStringFree(&ds);
	}
#endif
    }

    return ctx;
}

/*
 *-------------------------------------------------------------------
 *
 * StatusObjCmd -- return certificate for connected peer.
 * StatusObjCmd -- return certificate for connected peer info.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
2128
2129
2130
2131
2132
2133
2134
2135

2136
2137
2138
2139
2140
2141
2142
2192
2193
2194
2195
2196
2197
2198

2199
2200
2201
2202
2203
2204
2205
2206







-
+







    if (objc == 2) {
	peer = SSL_get_peer_certificate(statePtr->ssl);
    } else {
	peer = SSL_get_certificate(statePtr->ssl);
    }
    /* Get X509 certificate info */
    if (peer) {
	objPtr = Tls_NewX509Obj(interp, peer);
	objPtr = Tls_NewX509Obj(interp, peer, 1);
	if (objc == 2) {
	    X509_free(peer);
	    peer = NULL;
	}
    } else {
	objPtr = Tcl_NewListObj(0, NULL);
    }
2186
2187
2188
2189
2190
2191
2192


2193
2194
2195
2196
2197
2198
2199

2200
2201
2202
2203
2204
2205
2206
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273







+
+







+







	res = SSL_get_peer_signature_nid(statePtr->ssl, &nid);
    } else {
	res = SSL_get_signature_nid(statePtr->ssl, &nid);
    }
    if (!res) {nid = 0;}
    LAPPEND_STR(interp, objPtr, "signatureHashAlgorithm", OBJ_nid2ln(nid), -1);

    /* Added in OpenSSL 1.1.1a */
#if OPENSSL_VERSION_NUMBER > 0x10101000L
    if (objc == 2) {
	res = SSL_get_peer_signature_type_nid(statePtr->ssl, &nid);
    } else {
	res = SSL_get_signature_type_nid(statePtr->ssl, &nid);
    }
    if (!res) {nid = 0;}
    LAPPEND_STR(interp, objPtr, "signatureType", OBJ_nid2ln(nid), -1);
#endif

    Tcl_SetObjResult(interp, objPtr);
    return TCL_OK;
}

/*
 *-------------------------------------------------------------------
2218
2219
2220
2221
2222
2223
2224


2225
2226
2227
2228
2229
2230
2231
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300







+
+







    State *statePtr;		/* client state for ssl socket */
    Tcl_Obj *objPtr, *listPtr;
    const SSL *ssl;
    const SSL_CIPHER *cipher;
    const SSL_SESSION *session;
    const EVP_MD *md;
    (void) clientData;

    dprintf("Called");

    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "channel");
	return TCL_ERROR;
    }

    chan = Tcl_GetChannel(interp, Tcl_GetString(objv[1]), NULL);
2244
2245
2246
2247
2248
2249
2250






2251
2252
2253
2254
2255
2256




2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273




















2274
2275
2276
2277
2278
2279
2280
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379







+
+
+
+
+
+






+
+
+
+

















+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+








    objPtr = Tcl_NewListObj(0, NULL);

    /* Connection info */
    statePtr = (State *)Tcl_GetChannelInstanceData(chan);
    ssl = statePtr->ssl;
    if (ssl != NULL) {
	const unsigned char *proto;
	unsigned int ulen;

	/* Initialization finished */
	LAPPEND_BOOL(interp, objPtr, "init_finished", SSL_is_init_finished(ssl));
	
	/* connection state */
	LAPPEND_STR(interp, objPtr, "state", SSL_state_string_long(ssl), -1);

	/* Get SNI requested server name */
	LAPPEND_STR(interp, objPtr, "servername", SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name), -1);

	/* Report the selected protocol as a result of the negotiation */
	SSL_get0_alpn_selected(statePtr->ssl, &proto, &ulen);
	LAPPEND_STR(interp, objPtr, "alpn", (char *)proto, (Tcl_Size) ulen);

	/* Get protocol */
	LAPPEND_STR(interp, objPtr, "protocol", SSL_get_version(ssl), -1);

	/* Renegotiation allowed */
	LAPPEND_BOOL(interp, objPtr, "renegotiation_allowed", SSL_get_secure_renegotiation_support((SSL *) ssl));

	/* Get security level */
	LAPPEND_INT(interp, objPtr, "security_level", SSL_get_security_level(ssl));

	/* Session info */
	LAPPEND_BOOL(interp, objPtr, "session_reused", SSL_session_reused(ssl));

	/* Is server info */
	LAPPEND_BOOL(interp, objPtr, "is_server", SSL_is_server(ssl));

	/* Is DTLS */
	LAPPEND_BOOL(interp, objPtr, "is_dtls", SSL_is_dtls(ssl));

#if OPENSSL_VERSION_NUMBER >= 0x30200000L
	/* Is QUIC */
	LAPPEND_BOOL(interp, objPtr, "is_quic", SSL_is_quic(ssl));

	/* Is TLS */
	LAPPEND_BOOL(interp, objPtr, "is_tls", SSL_is_tls(ssl));
#endif

	/* DANE TLS authentication */
	LAPPEND_BOOL(interp, objPtr, "dane_auth", SSL_get0_dane((SSL *)ssl) != NULL);

	/* Waiting for async */
	LAPPEND_BOOL(interp, objPtr, "waiting_for_async", SSL_waiting_for_async((SSL *)ssl));

	/* Time-out */
	LAPPEND_LONG(interp, objPtr, "time-out", SSL_get_default_timeout(ssl));

	/* Is Certificate Transparency validation enabled */
	LAPPEND_BOOL(interp, objPtr, "ct_enabled", SSL_ct_is_enabled(ssl));
    }

    /* Cipher info */
    cipher = SSL_get_current_cipher(ssl);
    if (cipher != NULL) {
	char buf[BUFSIZ] = {0};
	int bits, alg_bits;
2726
2727
2728
2729
2730
2731
2732









2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747

2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772























2773
2774
2775
2776
2777
2778
2779
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849






2850













2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892







+
+
+
+
+
+
+
+
+









-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-












+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







 * Side effects:
 *	Frees all the state
 *
 *-------------------------------------------------------------------
 */
void Tls_Clean(State *statePtr) {
    dprintf("Called");

    if (statePtr->ssl) {
	/* Send close_notify message */
	dprintf("SSL_shutdown(%p)", statePtr->ssl);
	/* Will return return 0 while shutdown in process, then 1 when complete */
	/* closes the write direction of the connection; the read direction is closed by the peer. */
	/* Does not affect socket */
	SSL_shutdown(statePtr->ssl);
    }

    /*
     * we're assuming here that we're single-threaded
     */
    if (statePtr->timer != (Tcl_TimerToken) NULL) {
	Tcl_DeleteTimerHandler(statePtr->timer);
	statePtr->timer = NULL;
    }

    if (statePtr->protos) {
	ckfree(statePtr->protos);
	statePtr->protos = NULL;
    }
    if (statePtr->bio) {
	/* This will call SSL_shutdown. Bug 1414045 */
    /* Remove callbacks */
	dprintf("BIO_free_all(%p)", statePtr->bio);
	BIO_free_all(statePtr->bio);
	statePtr->bio = NULL;
    }
    if (statePtr->ssl) {
	dprintf("SSL_free(%p)", statePtr->ssl);
	SSL_free(statePtr->ssl);
	statePtr->ssl = NULL;
    }
    if (statePtr->ctx) {
	SSL_CTX_free(statePtr->ctx);
	statePtr->ctx = NULL;
    }
    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;
    }

    if (statePtr->protos) {
	ckfree(statePtr->protos);
	statePtr->protos = NULL;
    }

    if (statePtr->bio) {
	/* This will call SSL_shutdown. Bug 1414045 */
	dprintf("BIO_free_all(%p)", statePtr->bio);
	BIO_free_all(statePtr->bio);
	statePtr->bio = NULL;
    }

    if (statePtr->ssl) {
	dprintf("SSL_free(%p)", statePtr->ssl);
	SSL_free(statePtr->ssl);
	statePtr->ssl = NULL;
    }

    if (statePtr->ctx) {
	SSL_CTX_free(statePtr->ctx);
	statePtr->ctx = NULL;
    }

    dprintf("Returning");
}

/*
 *----------------------------------------------------------------------
 *
2853
2854
2855
2856
2857
2858
2859
2860
































































2861
2862
2863
2864
2865
2866

2867
2868


2869
2870
2871

2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900

2901
2902
2903
2904
2905
2906
2907
2908
2909

2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925

2926
2927
2928
2929
2930

2931
2932
2933
2934
2935


2936

2937

2938
2939
2940

2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042

3043
3044

3045
3046
3047
3048

3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059





3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072

3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098

3099
3100
3101
3102


3103


3104


3105
3106
3107
3108

3109

3110

3111
3112
3113
3114
3115
3116




















































































































+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+





-
+

-
+
+


-
+










-
-
-
-
-













-
+









+















-
+



-
-
+
-
-

-
-
+
+

+
-
+
-

-
+





-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
			    ".static"
#endif
		), NULL);
    }
    return TCL_OK;
}

/*
 *------------------------------------------------------*
 *
 * TlsLibShutdown --
 *
 *	Shutdown SSL library once per application
 *
 * Results:
 *	A standard TCL result
 *
 * Side effects:
 *	Shutdown SSL library
 *
 *------------------------------------------------------*
 */
void TlsLibShutdown(ClientData clientData) {
    dprintf("Called");

    BIO_cleanup();
}

/*
 *------------------------------------------------------*
 *
 *	TlsLibInit --
 *
 *	Initializes SSL library once per application
 *
 * Results:
 *	A standard Tcl result
 *
 * Side effects:
 *	Initializes SSL library
 *
 *------------------------------------------------------*
 */
static int TlsLibInit() {
    static int initialized = 0;

    dprintf("Called");

    if (!initialized) {
	/* Initialize BOTH libcrypto and libssl. */
	if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS | OPENSSL_INIT_LOAD_CRYPTO_STRINGS
	    | OPENSSL_INIT_ADD_ALL_CIPHERS | OPENSSL_INIT_ADD_ALL_DIGESTS
	    | OPENSSL_INIT_LOAD_CONFIG | OPENSSL_INIT_ASYNC, NULL)) {
	    return TCL_ERROR;
	}

	/* Create BIO handlers */
	BIO_new_tcl(NULL, 0);
	
	/* Create exit handler */
	Tcl_CreateExitHandler(TlsLibShutdown, NULL);
	initialized = 1;
    }
    return TCL_OK;
}

/* Init script */
static const char tlsTclInitScript[] = {
#include "tls.tcl.h"
};

/*
 *-------------------------------------------------------------------
 *
 * Tls_Init --
 *
 *	This is a package initialization procedure, which is called
 *	by Tcl when this package is to be added to an interpreter.
 *	by TCL when this package is to be added to an interpreter.
 *
 * Results:  Ssl configured and loaded
 * Results:
 *	Initializes structures and creates commands.
 *
 * Side effects:
 *	 create the ssl command, initialize ssl context
 *	 Create the commands
 *
 *-------------------------------------------------------------------
 */

#if TCL_MAJOR_VERSION > 8
#define MIN_VERSION "9.0"
#else
#define MIN_VERSION "8.5"
#endif

static const char tlsTclInitScript[] = {
#include "tls.tcl.h"
	0x00
    };

DLLEXPORT int Tls_Init(Tcl_Interp *interp) {

    dprintf("Called");

#ifdef USE_TCL_STUBS
    if (Tcl_InitStubs(interp, MIN_VERSION, 0) == NULL) {
	return TCL_ERROR;
    }
#endif
    if (Tcl_PkgRequire(interp, "Tcl", MIN_VERSION, 0) == NULL) {
	return TCL_ERROR;
    }

    if (TlsLibInit(0) != TCL_OK) {
    if (TlsLibInit() != TCL_OK) {
	Tcl_AppendResult(interp, "could not initialize SSL library", (char *) NULL);
	return TCL_ERROR;
    }

    Tcl_CreateObjCommand(interp, "::tls::ciphers", CiphersObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::connection", ConnectionInfoObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::handshake", HandshakeObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::import", ImportObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::unimport", UnimportObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::unstack", UnimportObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::status", StatusObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::version", VersionObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::misc", MiscObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::protocols", ProtocolsObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);

    BuildInfoCommand(interp);

    if (interp && Tcl_Eval(interp, tlsTclInitScript) != TCL_OK) {
	return TCL_ERROR;
    }

    return Tcl_PkgProvide(interp, PACKAGE_NAME, PACKAGE_VERSION);
}

/*
 *------------------------------------------------------*
 *-------------------------------------------------------------------
 *
 *	Tls_SafeInit --
 *
 *	------------------------------------------------*
 *	Standard procedure required by 'load'.
 *	This is a package initialization procedure for safe interps.
 *	Initializes this extension for a safe interpreter.
 *	------------------------------------------------*
 *
 *	Side effects:
 *		As of 'Tls_Init'
 * Results:
 *	Same as of 'Tls_Init'
 *
 * Side effects:
 *	Result:
 *	Same as of 'Tls_Init'
 *		A standard Tcl error code.
 *
 *------------------------------------------------------*
 *-------------------------------------------------------------------
 */
DLLEXPORT int Tls_SafeInit(Tcl_Interp *interp) {
    dprintf("Called");
    return Tls_Init(interp);
}

/*
 *------------------------------------------------------*
 *
 *	TlsLibInit --
 *
 *	------------------------------------------------*
 *	Initializes SSL library once per application
 *	------------------------------------------------*
 *
 *	Side effects:
 *		initializes SSL library
 *
 *	Result:
 *		none
 *
 *------------------------------------------------------*
 */
static int TlsLibInit(int uninitialize) {
    static int initialized = 0;
    int status = TCL_OK;
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
    size_t num_locks;
#endif

    if (uninitialize) {
	if (!initialized) {
	    dprintf("Asked to uninitialize, but we are not initialized");

	    return TCL_OK;
	}

	dprintf("Asked to uninitialize");

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	Tcl_MutexLock(&init_mx);

	if (locks) {
	    free(locks);
	    locks = NULL;
	    locksCount = 0;
	}
#endif
	initialized = 0;

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	Tcl_MutexUnlock(&init_mx);
#endif

	return TCL_OK;
    }

    if (initialized) {
	dprintf("Called, but using cached value");
	return status;
    }

    dprintf("Called");

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
    Tcl_MutexLock(&init_mx);
#endif
    initialized = 1;

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
    num_locks = 1;
    locksCount = (int) num_locks;
    locks = malloc(sizeof(*locks) * num_locks);
    memset(locks, 0, sizeof(*locks) * num_locks);
#endif

    /* Initialize BOTH libcrypto and libssl. */
    OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS | OPENSSL_INIT_LOAD_CRYPTO_STRINGS
	| OPENSSL_INIT_ADD_ALL_CIPHERS | OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);

    BIO_new_tcl(NULL, 0);

#if 0
    /*
     * XXX:TODO: Remove this code and replace it with a check
     * for enough entropy and do not try to create our own
     * terrible entropy
     */
    /*
     * Seed the random number generator in the SSL library,
     * using the do/while construct because of the bug note in the
     * OpenSSL FAQ at http://www.openssl.org/support/faq.html#USER1
     *
     * The crux of the problem is that Solaris 7 does not have a
     * /dev/random or /dev/urandom device so it cannot gather enough
     * entropy from the RAND_seed() when TLS initializes and refuses
     * to go further. Earlier versions of OpenSSL carried on regardless.
     */
    srand((unsigned int) time((time_t *) NULL));
    do {
	for (i = 0; i < 16; i++) {
	    rnd_seed[i] = 1 + (char) (255.0 * rand()/(RAND_MAX+1.0));
	}
	RAND_seed(rnd_seed, sizeof(rnd_seed));
    } while (RAND_status() != 1);
#endif

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	Tcl_MutexUnlock(&init_mx);
#endif

    return status;
}