TclTLS 1.7.22
==========

Release Date: Mon Oct 12 15:40:16 CDT 2020

https://tcltls.rkeene.org/

2015-05-01  Andreas Kupries  <andreask@activestate.com>

	* configure.in: Bump to version 1.6.5.
	* win/makefile.vc:
	* configure: regen with ac-2.59
	* tls.c: Accepted SF TLS [bug/patch #57](https://sourceforge.net/p/tls/bugs/57/).
	* tlsIO.c: Accepted core Tcl patch in [ticket](http://core.tcl.tk/tcl/tktview/0f94f855cafed92d0e174b7d835453a02831b4dd).

		$(srcdir)/license.terms $(srcdir)/manifest.uuid \
		$(srcdir)/README.txt $(srcdir)/pkgIndex.tcl.in $(DIST_DIR)/

	# TEA files
	$(INSTALL_DATA_DIR) $(DIST_DIR)/tclconfig
	$(DIST_INSTALL_DATA) $(srcdir)/tclconfig/README.txt \
		$(srcdir)/tclconfig/tcl.m4 $(srcdir)/tclconfig/install-sh \
		$(srcdir)/license.terms $(DIST_DIR)/tclconfig/
		$(srcdir)/tclconfig/license.terms $(DIST_DIR)/tclconfig/

	$(INSTALL_DATA_DIR) $(DIST_DIR)/win
	$(DIST_INSTALL_DATA) \
		$(srcdir)/win/README.txt $(srcdir)/win/*.vc \
		$(srcdir)/win/nmakehlp.c $(srcdir)/win/*.in $(DIST_DIR)/win/

	list='build demos doc generic library macosx tests unix'; \

	-rm -f *.$(OBJEXT) core *.core
	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)

distclean: clean
	-rm -f *.tab.c
	-rm -f $(CONFIG_CLEAN_FILES)
	-rm -f config.cache config.log config.status
	-rm -R autom4te.cache
	-rm -fR autom4te.cache

#========================================================================
# Install binary object libraries.  On Windows this includes both .dll and
# .lib files.  Because the .lib files are not explicitly listed anywhere,
# we need to deduce their existence from the .dll file of the same name.
# Library files go into the lib directory.
# In addition, this will generate the pkgIndex.tcl

# stub library C source files to compile in TEA_ADD_STUB_SOURCES,
# and runtime Tcl library files in TEA_ADD_TCL_SOURCES.
# This defines PKG(_STUB)_SOURCES, PKG(_STUB)_OBJECTS, PKG_HEADERS
# and PKG_TCL_SOURCES.
#-----------------------------------------------------------------------


    vars="tls.c tlsBIO.c tlsIO.c tlsX509.c"
    vars="tls.c tlsBIO.c tlsDigest.c tlsEncrypt.c tlsInfo.c tlsIO.c tlsKDF.c tlsRand.c tlsUtil.c tlsX509.c"
    for i in $vars; do
	case $i in
	    \$*)
		# allow $-var names
		PKG_SOURCES="$PKG_SOURCES $i"
		PKG_OBJECTS="$PKG_OBJECTS $i"
		;;

		if test -z "$TCLTLS_SSL_LIBS"; then
		TCLTLS_SSL_LIBS="-lcrypto -lssl"
	fi
	if test -z "$TCLTLS_SSL_CFLAGS"; then
		TCLTLS_SSL_CFLAGS=""
	fi
	if test -z "$TCLTLS_SSL_INCLUDES"; then
		if test -d /usr/include/openssl; then
		if test -f /usr/include/openssl/ssl.h; then
			TCLTLS_SSL_INCLUDES="-I/usr/include/openssl"
		else
			TCLTLS_SSL_INCLUDES="-I/usr/include"
		fi
	fi

# public headers that need to be installed in TEA_ADD_HEADERS,
# stub library C source files to compile in TEA_ADD_STUB_SOURCES,
# and runtime Tcl library files in TEA_ADD_TCL_SOURCES.
# This defines PKG(_STUB)_SOURCES, PKG(_STUB)_OBJECTS, PKG_HEADERS
# and PKG_TCL_SOURCES.
#-----------------------------------------------------------------------

TEA_ADD_SOURCES([tls.c tlsBIO.c tlsIO.c tlsX509.c])
TEA_ADD_SOURCES([tls.c tlsBIO.c tlsDigest.c tlsEncrypt.c tlsInfo.c tlsIO.c tlsKDF.c tlsRand.c tlsUtil.c tlsX509.c])
TEA_ADD_HEADERS([generic/tls.h])
TEA_ADD_INCLUDES([])
TEA_ADD_LIBS([])
TEA_ADD_CFLAGS([])
TEA_ADD_STUB_SOURCES([])
TEA_ADD_TCL_SOURCES([library/tls.tcl])

/*
 *  Copyright (C) 1997-2000 Matt Newman <matt@novadigm.com>
 *
 * Stylized option processing - requires consistent
 * Convenient option processing
 * external vars: opt, idx, objc, objv
 */

#ifndef _TCL_OPTS_H
#define _TCL_OPTS_H

#define OPT_PROLOG(option)			\
    if (strcmp(opt, (option)) == 0) {		\
#define GET_OPT_BOOL(objPtr, varPtr) \
    if (Tcl_GetBooleanFromObj(interp, objPtr, varPtr) != TCL_OK) {	\
	if (++idx >= objc) {			\
	    Tcl_AppendResult(interp,		\
		"no argument given for ",	\
		(option), " option",		\
		(char *) NULL);			\
	    return TCL_ERROR;			\
	}
#define OPT_POSTLOG()				\
	continue;				\
	return TCL_ERROR;					\
    }

#define GET_OPT_INT(objPtr, varPtr) \
    if (Tcl_GetIntFromObj(interp, objPtr, varPtr) != TCL_OK) {	\
	return TCL_ERROR;					\
    }
#define OPTOBJ(option, var)			\
    OPT_PROLOG(option)				\
    var = objv[idx];				\

#define GET_OPT_LONG(objPtr, varPtr) \
    if (Tcl_GetLongFromObj(interp, objPtr, varPtr) != TCL_OK) {	\
	return TCL_ERROR;					\
    OPT_POSTLOG()

#define OPTSTR(option, var)			\
    OPT_PROLOG(option)				\
    var = Tcl_GetString(objv[idx]);\
    }

#define GET_OPT_WIDE(objPtr, varPtr) \
    if (Tcl_GetWideIntFromObj(interp, objPtr, varPtr) != TCL_OK) {	\
    OPT_POSTLOG()

	return TCL_ERROR;					\
    }
#define OPTINT(option, var)			\
    OPT_PROLOG(option)				\
    if (Tcl_GetIntFromObj(interp, objv[idx],	\
	    &(var)) != TCL_OK) {		\
	    return TCL_ERROR;			\

#define GET_OPT_BIGNUM(objPtr, varPtr) \
    if (Tcl_GetBignumFromObj(interp, objPtr, varPtr) != TCL_OK) {	\
	return TCL_ERROR;					\
    }						\
    OPT_POSTLOG()

#define OPTBOOL(option, var)			\
    OPT_PROLOG(option)				\
    if (Tcl_GetBooleanFromObj(interp, objv[idx],\
    }

#define GET_OPT_STRING(objPtr, var, lenPtr) \
    if ((var = Tcl_GetStringFromObj(objPtr, lenPtr)) == NULL) {	\
	    &(var)) != TCL_OK) {		\
	    return TCL_ERROR;			\
    }						\
	return TCL_ERROR;					\
    }								\
    OPT_POSTLOG()

#define OPTBYTE(option, var, lvar)		\
#define GET_OPT_BYTE_ARRAY(objPtr, var, lenPtr) \
    OPT_PROLOG(option)				\
    var = Tcl_GetByteArrayFromObj(objv[idx], &(lvar));\
    if ((var = Tcl_GetByteArrayFromObj(objPtr, lenPtr)) == NULL) {	\
    OPT_POSTLOG()

#define OPTBAD(type, list)			\
	return TCL_ERROR;					\
    }								\
    Tcl_AppendResult(interp, "bad ", (type),	\
		" \"", opt, "\": must be ",	\
		(list), (char *) NULL)

#endif /* _TCL_OPTS_H */

 */

#include "tlsInt.h"
#include "tclOpts.h"
#include "tlsUuid.h"
#include <stdio.h>
#include <stdlib.h>
#include <openssl/crypto.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/objects.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

static void
MessageCallback(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg) {
    State *statePtr = (State*)arg;
    Tcl_Interp *interp	= statePtr->interp;
    Tcl_Obj *cmdPtr;
    char *ver, *type;
    BIO *bio;
    char buffer[15000];
    char buffer[30000];
    buffer[0] = 0;

    dprintf("Called");

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

 *	  to a string describing the SSL negotiation failure reason
 *
 *-------------------------------------------------------------------
 */
static int
VerifyCallback(int ok, X509_STORE_CTX *ctx) {
    Tcl_Obj *cmdPtr;
    SSL   *ssl		= (SSL*)X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
    SSL   *ssl = (SSL*)X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
    X509  *cert		= X509_STORE_CTX_get_current_cert(ctx);
    State *statePtr	= (State*)SSL_get_app_data(ssl);
    Tcl_Interp *interp	= statePtr->interp;
    int depth		= X509_STORE_CTX_get_error_depth(ctx);
    int err		= X509_STORE_CTX_get_error(ctx);

    dprintf("Called");

/********************/
/* Commands         */
/********************/

/*
 *-------------------------------------------------------------------
 *
 * CiphersObjCmd -- list available ciphers
 *
 *	This procedure is invoked to process the "tls::ciphers" command
 *	to list available ciphers, based upon protocol selected.
 *
 * Results:
 *	A standard Tcl result list.
 *
 * Side effects:
 *	constructs and destroys SSL context (CTX)
 *
 *-------------------------------------------------------------------
 */
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
};

static int
CiphersObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
    Tcl_Obj *objPtr = NULL;
    SSL_CTX *ctx = NULL;
    SSL *ssl = NULL;
    STACK_OF(SSL_CIPHER) *sk;
    char buf[BUFSIZ];
    int index, verbose = 0, use_supported = 0;
    const SSL_METHOD *method;
    (void) clientData;

    dprintf("Called");

    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;
    }

    ERR_clear_error();

    switch ((enum protocol)index) {
	case TLS_SSL2:
#if OPENSSL_VERSION_NUMBER >= 0x10100000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
	    Tcl_AppendResult(interp, protocols[index], ": protocol not supported", (char *) NULL);
	    return TCL_ERROR;
#else
	    method = SSLv2_method(); break;
#endif
	case TLS_SSL3:
#if defined(NO_SSL3) || defined(OPENSSL_NO_SSL3) || defined(OPENSSL_NO_SSL3_METHOD)
	    Tcl_AppendResult(interp, protocols[index], ": protocol not supported", (char *) NULL);
	    return TCL_ERROR;
#else
	    method = SSLv3_method(); break;
#endif
	case TLS_TLS1:
#if defined(NO_TLS1) || defined(OPENSSL_NO_TLS1) || defined(OPENSSL_NO_TLS1_METHOD)
	    Tcl_AppendResult(interp, protocols[index], ": protocol not supported", (char *) NULL);
	    return TCL_ERROR;
#else
	    method = TLSv1_method(); break;
#endif
	case TLS_TLS1_1:
#if defined(NO_TLS1_1) || defined(OPENSSL_NO_TLS1_1) || defined(OPENSSL_NO_TLS1_1_METHOD)
	    Tcl_AppendResult(interp, protocols[index], ": protocol not supported", (char *) NULL);
	    return TCL_ERROR;
#else
	    method = TLSv1_1_method(); break;
#endif
	case TLS_TLS1_2:
#if defined(NO_TLS1_2) || defined(OPENSSL_NO_TLS1_2) || defined(OPENSSL_NO_TLS1_2_METHOD)
	    Tcl_AppendResult(interp, protocols[index], ": protocol not supported", (char *) NULL);
	    return TCL_ERROR;
#else
	    method = TLSv1_2_method(); break;
#endif
	case TLS_TLS1_3:
#if defined(NO_TLS1_3) || defined(OPENSSL_NO_TLS1_3)
	    Tcl_AppendResult(interp, protocols[index], ": protocol not supported", (char *) NULL);
	    return TCL_ERROR;
#else
	    method = TLS_method();
	    SSL_CTX_set_min_proto_version(ctx, TLS1_3_VERSION);
	    SSL_CTX_set_max_proto_version(ctx, TLS1_3_VERSION);
	    break;
#endif
	default:
	    method = TLS_method();
	    break;
    }

    ctx = SSL_CTX_new(method);
    if (ctx == NULL) {
	Tcl_AppendResult(interp, GET_ERR_REASON(), (char *) NULL);
	return TCL_ERROR;
    }

    ssl = SSL_new(ctx);
    if (ssl == NULL) {
	Tcl_AppendResult(interp, GET_ERR_REASON(), (char *) NULL);
	SSL_CTX_free(ctx);
	return TCL_ERROR;
    }

    /* Use list and order as would be sent in a ClientHello or all available ciphers */
    if (use_supported) {
	sk = SSL_get1_supported_ciphers(ssl);
    } else {
	sk = SSL_get_ciphers(ssl);
    }

    if (sk != NULL) {
	if (!verbose) {
	    const char *cp;
	    objPtr = Tcl_NewListObj(0, NULL);
	    for (int i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
		const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
		if (c == NULL) continue;

		/* cipher name or (NONE) */
		cp = SSL_CIPHER_get_name(c);
		if (cp == NULL) break;
		Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *) cp, -1));
	    }

	} else {
	    objPtr = Tcl_NewStringObj("",0);
	    for (int i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
		const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
		if (c == NULL) continue;

		/* textual description of the cipher */
		if (SSL_CIPHER_description(c, buf, sizeof(buf)) != NULL) {
		    Tcl_AppendToObj(objPtr, buf, (Tcl_Size) strlen(buf));
		} else {
		    Tcl_AppendToObj(objPtr, "UNKNOWN\n", 8);
		}
	    }
	}
	if (use_supported) {
	    sk_SSL_CIPHER_free(sk);
	}
    }
    SSL_free(ssl);
    SSL_CTX_free(ctx);

    Tcl_SetObjResult(interp, objPtr);
    return TCL_OK;
}

/*
 *-------------------------------------------------------------------
 *
 * ProtocolsObjCmd -- list available protocols
 *
 *	This procedure is invoked to process the "tls::protocols" command
 *	to list available protocols.
 *
 * Results:
 *	A standard Tcl result list.
 *
 * Side effects:
 *	none
 *
 *-------------------------------------------------------------------
 */
static int
ProtocolsObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
    Tcl_Obj *objPtr;
    (void) clientData;

    dprintf("Called");

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

    ERR_clear_error();

    objPtr = Tcl_NewListObj(0, NULL);

#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(NO_SSL2) && !defined(OPENSSL_NO_SSL2)
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(protocols[TLS_SSL2], -1));
#endif
#if !defined(NO_SSL3) && !defined(OPENSSL_NO_SSL3) && !defined(OPENSSL_NO_SSL3_METHOD)
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(protocols[TLS_SSL3], -1));
#endif
#if !defined(NO_TLS1) && !defined(OPENSSL_NO_TLS1) && !defined(OPENSSL_NO_TLS1_METHOD)
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(protocols[TLS_TLS1], -1));
#endif
#if !defined(NO_TLS1_1) && !defined(OPENSSL_NO_TLS1_1) && !defined(OPENSSL_NO_TLS1_1_METHOD)
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(protocols[TLS_TLS1_1], -1));
#endif
#if !defined(NO_TLS1_2) && !defined(OPENSSL_NO_TLS1_2) && !defined(OPENSSL_NO_TLS1_2_METHOD)
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(protocols[TLS_TLS1_2], -1));
#endif
#if !defined(NO_TLS1_3) && !defined(OPENSSL_NO_TLS1_3)
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(protocols[TLS_TLS1_3], -1));
#endif

    Tcl_SetObjResult(interp, objPtr);
    return TCL_OK;
}

/*
 *-------------------------------------------------------------------
 *
 * HandshakeObjCmd --
 *
 *	This command is used to verify whether the handshake is complete
 *	or not.
 *
 * Results:
 *	A standard Tcl result. 1 means handshake complete, 0 means pending.

    }

    dprintf("Returning TCL_OK with data \"%i\"", ret);
    Tcl_SetObjResult(interp, Tcl_NewIntObj(ret));
    return TCL_OK;
}

static const char *command_opts [] = {
    "-alpn", "-cadir", "-cafile", "-cert", "-certfile", "-cipher", "-ciphers", "-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", "-validatecommand", "-vcmd", NULL};

enum _command_opts {
    _opt_alpn, _opt_cadir, _opt_cafile, _opt_cert, _opt_certfile, _opt_cipher, _opt_ciphers,
    _opt_ciphersuite, _opt_cmd, _opt_dhparams, _opt_key, _opt_keyfile, _opt_model, _opt_password,
    _opt_handshake, _opt_request, _opt_require, _opt_security_level, _opt_server, _opt_servername,
    _opt_session_id, _opt_ssl2, _opt_ssl3, _opt_tls1, _opt_tls11, _opt_tls12, _opt_tls13,
    _opt_validate, _opt_vcmd
};

/*
 *-------------------------------------------------------------------
 *
 * ImportObjCmd --
 *
 *	This procedure is invoked to process the "ssl" command
 *

 *-------------------------------------------------------------------
 */
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 *cmdObj		= NULL;
    Tcl_Obj *passwdObj		= NULL;
    Tcl_Obj *vcmd		= NULL;
    Tcl_DString upperChannelTranslation, upperChannelBlocking, upperChannelEncoding, upperChannelEOFChar;
    int idx;
    Tcl_Size len;
    Tcl_Size fn, len;
    int flags			= TLS_TCL_INIT;
    int server			= 0;	/* is connection incoming or outgoing? */
    char *keyfile		= NULL;
    char *certfile		= NULL;
    unsigned char *key		= NULL;
    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 *DHparams		= NULL;
    char *model			= NULL;
    char *servername		= NULL;	/* hostname for Server Name Indication */
    char *session_id		= NULL;
    Tcl_Obj *alpn		= NULL;
    const unsigned char *session_id = NULL;
    Tcl_Size sess_len		= 0;
    Tcl_Obj *alpnObj		= NULL;
    int ssl2 = 0, ssl3 = 0;
    int tls1 = 1, tls1_1 = 1, tls1_2 = 1, tls1_3 = 1;
    int proto = 0, level = -1;
    int verify = 0, require = 0, request = 1, post_handshake = 0;
    (void) clientData;

    dprintf("Called");

	return TCL_ERROR;
    }

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

    for (idx = 2; idx < objc; idx++) {
	if (Tcl_GetIndexFromObj(interp, objv[idx], command_opts, "option", 0, &fn) != TCL_OK) {
	    return TCL_ERROR;
	}
	char *opt = Tcl_GetString(objv[idx]);

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

	/* Validate arg has value */
	if (++idx >= objc) {
	    Tcl_AppendResult(interp, "No value for option \"", command_opts[fn], "\"", (char *) NULL);
	    return TCL_ERROR;
	}

	switch(fn) {
	case _opt_alpn:
	    alpnObj = objv[idx];
	    break;
	case _opt_cadir:
	    GET_OPT_STRING(objv[idx], CApath, NULL);
	    break;
	case _opt_cafile:
	    GET_OPT_STRING(objv[idx], CAfile, NULL);
	    break;
	case _opt_cert:
	    GET_OPT_BYTE_ARRAY(objv[idx], cert, &cert_len);
	    break;
	case _opt_certfile:
	    GET_OPT_STRING(objv[idx], certfile, NULL);
	    break;
	case _opt_cipher:
	case _opt_ciphers:
	    GET_OPT_STRING(objv[idx], ciphers, NULL);
	    break;
	case _opt_ciphersuite:
	    GET_OPT_STRING(objv[idx], ciphersuites, NULL);
	    break;
	case _opt_cmd:
	    cmdObj = objv[idx];
	    break;
	case _opt_dhparams:
	    GET_OPT_STRING(objv[idx], DHparams, NULL);
	    break;
	case _opt_key:
	    GET_OPT_BYTE_ARRAY(objv[idx], key, &key_len);
	    break;
	case _opt_keyfile:
	    GET_OPT_STRING(objv[idx], keyfile, NULL);
	    break;
	case _opt_model:
	    GET_OPT_STRING(objv[idx], model, NULL);
	    break;
	case _opt_password:
	    passwdObj = objv[idx];
	    break;
	case _opt_handshake:
	    GET_OPT_BOOL(objv[idx], &post_handshake);
	    break;
	case _opt_request:
	    GET_OPT_BOOL(objv[idx], &request);
	    break;
	case _opt_require:
	    GET_OPT_BOOL(objv[idx], &require);
	    break;
	case _opt_security_level:
	    GET_OPT_INT(objv[idx], &level);
	    break;
	case _opt_server:
	    GET_OPT_BOOL(objv[idx], &server);
	    break;
	case _opt_servername:
	    GET_OPT_STRING(objv[idx], servername, NULL);
	    break;
	case _opt_session_id:
	    GET_OPT_BYTE_ARRAY(objv[idx], session_id, &sess_len);
	    break;
	case _opt_ssl2:
	    GET_OPT_INT(objv[idx], &ssl2);
	    break;
	case _opt_ssl3:
	    GET_OPT_INT(objv[idx], &ssl3);
	    break;
	case _opt_tls1:
	    GET_OPT_INT(objv[idx], &tls1);
	    break;
	case _opt_tls11:
	    GET_OPT_INT(objv[idx], &tls1_1);
	    break;
	case _opt_tls12:
	    GET_OPT_INT(objv[idx], &tls1_2);
	    break;
	case _opt_tls13:
	    GET_OPT_INT(objv[idx], &tls1_3);
	    break;
	case _opt_validate:
	case _opt_vcmd:
	    vcmd = objv[idx];
	    break;

	}
	OPTOBJ("-alpn", alpn);
	OPTSTR("-cadir", CApath);
	OPTSTR("-cafile", CAfile);
	OPTBYTE("-cert", cert, cert_len);
	OPTSTR("-certfile", certfile);
	OPTSTR("-cipher", ciphers);
	OPTSTR("-ciphers", ciphers);
	OPTSTR("-ciphersuites", ciphersuites);
	OPTOBJ("-command", script);
	OPTSTR("-dhparams", DHparams);
	OPTBYTE("-key", key, key_len);
	OPTSTR("-keyfile", keyfile);
	OPTSTR("-model", model);
	OPTOBJ("-password", password);
	OPTBOOL("-post_handshake", post_handshake);
	OPTBOOL("-request", request);
	OPTBOOL("-require", require);
	OPTINT("-security_level", level);
	OPTBOOL("-server", server);
	OPTSTR("-servername", servername);
	OPTSTR("-session_id", session_id);
	OPTBOOL("-ssl2", ssl2);
	OPTBOOL("-ssl3", ssl3);
	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");

	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;

    proto |= (ssl2 ? TLS_PROTO_SSL2 : 0);
    proto |= (ssl3 ? TLS_PROTO_SSL3 : 0);

    statePtr->flags	= flags;
    statePtr->interp	= interp;
    statePtr->vflags	= verify;
    statePtr->err	= "";

    /* allocate script */
    if (script) {
	(void) Tcl_GetStringFromObj(script, &len);
    if (cmdObj != NULL) {
	(void) Tcl_GetStringFromObj(cmdObj, &len);
	if (len) {
	    statePtr->callback = script;
	    statePtr->callback = cmdObj;
	    Tcl_IncrRefCount(statePtr->callback);
	}
    }

    /* allocate password */
    if (password) {
	(void) Tcl_GetStringFromObj(password, &len);
    if (passwdObj != NULL) {
	(void) Tcl_GetStringFromObj(passwdObj, &len);
	if (len) {
	    statePtr->password = password;
	    statePtr->password = passwdObj;
	    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);
	    Tls_Free((tls_free_type *) statePtr);
	    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", (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "CHANNEL", "INVALID", (char *) NULL);
	    Tls_Free((char *) statePtr);
	    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) {
	    Tls_Free((char *) statePtr);
	    Tls_Free((tls_free_type *) statePtr);
	    return TCL_ERROR;
	}
    }

    statePtr->ctx = ctx;

    /*

    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((char *) statePtr);
	Tls_Free((tls_free_type *) statePtr);
	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));
    Tcl_DStringFree(&upperChannelTranslation);
    Tcl_DStringFree(&upperChannelEncoding);
    Tcl_DStringFree(&upperChannelEOFChar);
    Tcl_DStringFree(&upperChannelBlocking);

    /*
     * SSL Initialization
     */
    statePtr->ssl = SSL_new(statePtr->ctx);
    if (!statePtr->ssl) {
	/* SSL library error */
	Tcl_AppendResult(interp, "couldn't construct ssl session: ", GET_ERR_REASON(), (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "INIT", "FAILED", (char *) NULL);
	Tls_Free((char *) statePtr);
	Tls_Free((tls_free_type *) statePtr);
	return TCL_ERROR;
    }

    /* Set host server name */
    if (servername) {
	/* Sets the server name indication (SNI) in ClientHello extension */
	/* Per RFC 6066, hostname is a ASCII encoded string, though RFC 4366 says UTF-8. */
	if (!SSL_set_tlsext_host_name(statePtr->ssl, servername) && require) {
	    Tcl_AppendResult(interp, "Set SNI extension failed: ", GET_ERR_REASON(), (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "SNI", "FAILED", (char *) NULL);
	    Tls_Free((char *) statePtr);
	    Tls_Free((tls_free_type *) statePtr);
	    return TCL_ERROR;
	}

	/* Set hostname for peer certificate hostname verification in clients.
	   Don't use SSL_set1_host since it has limitations. */
	if (!SSL_add1_host(statePtr->ssl, servername)) {
	    Tcl_AppendResult(interp, "Set DNS hostname failed: ", GET_ERR_REASON(), (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "HOSTNAME", "FAILED", (char *) NULL);
	    Tls_Free((char *) statePtr);
	    Tls_Free((tls_free_type *) statePtr);
	    return TCL_ERROR;
	}
    }

    /* Resume session id */
    if (session_id && strlen(session_id) <= SSL_MAX_SID_CTX_LENGTH) {
    if (session_id && sess_len <= SSL_MAX_SID_CTX_LENGTH) {
	/* SSL_set_session() */
	if (!SSL_SESSION_set1_id_context(SSL_get_session(statePtr->ssl),
	if (!SSL_SESSION_set1_id_context(SSL_get_session(statePtr->ssl), session_id, (unsigned int) sess_len)) {
		(const unsigned char *) session_id, (unsigned int) strlen(session_id))) {
	    Tcl_AppendResult(interp, "Resume session failed: ", GET_ERR_REASON(), (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "SESSION", "FAILED", (char *) NULL);
	    Tls_Free((char *) statePtr);
	    Tls_Free((tls_free_type *) statePtr);
	    return TCL_ERROR;
	}
    }

    /* Enable Application-Layer Protocol Negotiation. Examples are: http/1.0,
	http/1.1, h2, h3, ftp, imap, pop3, xmpp-client, xmpp-server, mqtt, irc, etc. */
    if (alpn) {
    if (alpnObj != NULL) {
	/* Convert a TCL list into a protocol-list in wire-format */
	unsigned char *protos, *p;
	unsigned int protos_len = 0;
	Tcl_Size cnt, i;
	int j;
	Tcl_Obj **list;

	if (Tcl_ListObjGetElements(interp, alpn, &cnt, &list) != TCL_OK) {
	    Tls_Free((char *) statePtr);
	if (Tcl_ListObjGetElements(interp, alpnObj, &cnt, &list) != TCL_OK) {
	    Tls_Free((tls_free_type *) 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 names too long", (char *) NULL);
		Tcl_SetErrorCode(interp, "TLS", "IMPORT", "ALPN", "FAILED", (char *) NULL);
		Tls_Free((char *) statePtr);
		Tls_Free((tls_free_type *) statePtr);
		return TCL_ERROR;
	    }
	    protos_len += 1 + (int) len;
	}

	/* Build the complete protocol-list */
	protos = ckalloc(protos_len);
	/* protocol-lists consist of 8-bit length-prefixed, byte strings */
	for (j = 0, p = protos; j < cnt; j++) {
	    char *str = Tcl_GetStringFromObj(list[j], &len);
	    *p++ = (unsigned char) len;
	    memcpy(p, str, (size_t) len);
	    p += len;
	}

	/* SSL_set_alpn_protos makes a copy of the protocol-list */
	/* Note: This function reverses the return value convention */
	if (SSL_set_alpn_protos(statePtr->ssl, protos, protos_len)) {
	    Tcl_AppendResult(interp, "Set ALPN protocols failed: ", GET_ERR_REASON(), (char *) NULL);
	    Tcl_SetErrorCode(interp, "TLS", "IMPORT", "ALPN", "FAILED", (char *) NULL);
	    Tls_Free((char *) statePtr);
	    Tls_Free((tls_free_type *) statePtr);
	    ckfree(protos);
	    return TCL_ERROR;
	}

	/* Store protocols list */
	statePtr->protos = protos;
	statePtr->protos_len = protos_len;
    } else {
	statePtr->protos = NULL;
	statePtr->protos_len = 0;
    }

    /*
     * SSL Callbacks
     */
    SSL_set_app_data(statePtr->ssl, (void *)statePtr);	/* point back to us */

    SSL_set_verify(statePtr->ssl, verify, VerifyCallback);
    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); */

	load_private_key = 1;
	if (SSL_CTX_use_certificate_ASN1(ctx, 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();

	if (SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM) <= 0) {
#if 0
	    Tcl_AppendResult(interp, "unable to use default certificate file ", certfile, ": ",
		GET_ERR_REASON(), (char *) NULL);

    /* Get certificate for peer or self */
    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);
	if (objc == 2) {
	    X509_free(peer);
	    peer = NULL;
	}

	LAPPEND_INT(interp, objPtr, "algorithm_bits", 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) */

	/* Indicates which SSL/TLS protocol version first defined the cipher */
	LAPPEND_STR(interp, objPtr, "min_version", SSL_CIPHER_get_version(cipher), -1);

	/* Cipher NID */
	/* Cipher NID, digest NID (none for AEAD cipher suites), Key Exchange NID, and authentication NID */
	LAPPEND_STR(interp, objPtr, "cipherNID", (char *)OBJ_nid2ln(SSL_CIPHER_get_cipher_nid(cipher)), -1);
	LAPPEND_STR(interp, objPtr, "digestNID", (char *)OBJ_nid2ln(SSL_CIPHER_get_digest_nid(cipher)), -1);
	LAPPEND_STR(interp, objPtr, "keyExchangeNID", (char *)OBJ_nid2ln(SSL_CIPHER_get_kx_nid(cipher)), -1);
	LAPPEND_STR(interp, objPtr, "authenticationNID", (char *)OBJ_nid2ln(SSL_CIPHER_get_auth_nid(cipher)), -1);

	/* message authentication code - Cipher is AEAD (e.g. GCM or ChaCha20/Poly1305) or not */
	/* Authenticated Encryption with associated data (AEAD) check */
	LAPPEND_BOOL(interp, objPtr, "cipher_is_aead", SSL_CIPHER_is_aead(cipher));

	/* Digest used during the SSL/TLS handshake when using the cipher. */
	md = SSL_CIPHER_get_handshake_digest(cipher);
	LAPPEND_STR(interp, objPtr, "handshake_digest", (char *)EVP_MD_name(md), -1);

	/* Get OpenSSL-specific ID, not IANA ID */
	LAPPEND_INT(interp, objPtr, "cipher_id", (int) SSL_CIPHER_get_id(cipher));

	/* Two-byte ID used in the TLS protocol of the given cipher */
	LAPPEND_INT(interp, objPtr, "protocol_id", (int) SSL_CIPHER_get_protocol_id(cipher));

	/* Textual description of the cipher */
	/* Textual description of the cipher. Includes: cipher name, protocol version, key
	   exchange, authentication, symmetric encryption method, message authentication code */
	if (SSL_CIPHER_description(cipher, buf, sizeof(buf)) != NULL) {
	    LAPPEND_STR(interp, objPtr, "description", buf, -1);
	}

	/* Digest used during the SSL/TLS handshake when using the cipher. */
	md = SSL_CIPHER_get_handshake_digest(cipher);
	LAPPEND_STR(interp, objPtr, "handshake_digest", (char *)EVP_MD_name(md), -1);
    }

    /* Session info */
    session = SSL_get_session(ssl);
    if (session != NULL) {
	const unsigned char *ticket;
	size_t len2;

    /* CA List */
    /* IF not a server, same as SSL_get0_peer_CA_list. If server same as SSL_CTX_get_client_CA_list */
    listPtr = Tcl_NewListObj(0, NULL);
    STACK_OF(X509_NAME) *ca_list;
    if ((ca_list = SSL_get_client_CA_list(ssl)) != NULL) {
	char buffer[BUFSIZ];

	for (int i = 0; i < sk_X509_NAME_num(ca_list); i++) {
	    X509_NAME *name = sk_X509_NAME_value(ca_list, i);
	    if (name) {
		X509_NAME_oneline(name, buffer, BUFSIZ);
		Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(buffer, -1));
	    }
	}
    }
    LAPPEND_OBJ(interp, objPtr, "caList", listPtr);
    LAPPEND_INT(interp, objPtr, "caListCount", sk_X509_NAME_num(ca_list));

    Tcl_SetObjResult(interp, objPtr);
    return TCL_OK;
}


/*
 *-------------------------------------------------------------------
 *
 * VersionObjCmd -- return version string from OpenSSL.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------
 */
static int
VersionObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
    Tcl_Obj *objPtr;
    (void) clientData;
    (void) objc;
    (void) objv;

    dprintf("Called");

    objPtr = Tcl_NewStringObj(OPENSSL_VERSION_TEXT, -1);
    Tcl_SetObjResult(interp, objPtr);

    return TCL_OK;
}

/*
 *-------------------------------------------------------------------
 *
 * MiscObjCmd -- misc commands

 *
 * Side effects:
 *	Frees all the state
 *
 *-------------------------------------------------------------------
 */
void
Tls_Free(char *blockPtr) {
Tls_Free(tls_free_type *blockPtr) {
    State *statePtr = (State *)blockPtr;

    dprintf("Called");

    Tls_Clean(statePtr);
    ckfree(blockPtr);
}

    }

    if (TlsLibInit(0) != 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::misc", MiscObjCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "::tls::unimport", 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);
    Tls_DigestCommands(interp);
    Tls_EncryptCommands(interp);
    Tls_InfoCommands(interp);
    Tls_KDFCommands(interp);
    Tls_RandCommands(interp);

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

    return Tcl_PkgProvide(interp, PACKAGE_NAME, PACKAGE_VERSION);
}

	    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);
    Tcl_MutexUnlock(&init_mx);
#endif

    return status;
}

	} else {
	    dprintf("Calling SSL_connect()");
	    err = SSL_connect(statePtr->ssl);
	}

	if (err > 0) {
	    dprintf("Accept or connect was successful");

	    err = BIO_flush(statePtr->bio);
	    if (err <= 0) {
		dprintf("Flushing the lower layers failed, this will probably terminate this session");
	    }
	} else {
	    dprintf("Accept or connect failed");
	}

	    *errorCodePtr = EINVAL;
	    Tls_Error(statePtr, "Peer has closed the connection for writing by sending the close_notify alert");
	    return -1;

	case SSL_ERROR_SYSCALL:
	    /* Some non-recoverable, fatal I/O error occurred */
	    dprintf("SSL_ERROR_SYSCALL");

	    if (backingError == 0 && err == 0) {
		dprintf("EOF reached")
		*errorCodePtr = ECONNRESET;
		Tls_Error(statePtr, "(unexpected) EOF reached");

	    } else if (backingError == 0 && err == -1) {
		dprintf("I/O error occurred (errno = %lu)", (unsigned long) Tcl_GetErrno());

		Tls_Error(statePtr, "EOF reached");
	    }    
#endif
	    break;

	case SSL_ERROR_SYSCALL:
	    /* Some non-recoverable, fatal I/O error occurred */

	    if (backingError == 0 && bytesRead == 0) {
		/* Unexpected EOF from the peer for OpenSSL 1.1 */
		dprintf("(Unexpected) EOF reached")
		*errorCodePtr = 0;
		bytesRead = 0;
		Tls_Error(statePtr, "EOF reached");

	    written = 0;
	    *errorCodePtr = 0;
	    Tls_Error(statePtr, "Peer has closed the connection for writing by sending the close_notify alert");
	    break;

	case SSL_ERROR_SYSCALL:
	    /* Some non-recoverable, fatal I/O error occurred */

	    if (backingError == 0 && written == 0) {
		dprintf("EOF reached")
		*errorCodePtr = 0;
		written = 0;
		Tls_Error(statePtr, "EOF reached");

	    } else if (backingError == 0 && written == -1) {

#   endif
#endif

/*
 * Backwards compatibility for size type change
 */
#if TCL_MAJOR_VERSION < 9 && TCL_MINOR_VERSION < 7
    #include <limits.h>
    #define TCL_SIZE_MAX INT_MAX

    #ifndef Tcl_Size
        typedef int Tcl_Size;
    #endif

    #define TCL_SIZE_MODIFIER ""
    #define Tcl_GetSizeIntFromObj Tcl_GetIntFromObj
    #define Tcl_NewSizeIntObj     Tcl_NewIntObj
    #define Tcl_NewSizeIntFromObj Tcl_NewWideIntObj
#endif

#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/opensslv.h>

#ifdef USE_TCL_STUBS
#ifndef Tcl_StackChannel
#error "Unable to compile on this version of Tcl"
#endif /* Tcl_GetStackedChannel */
#endif /* USE_TCL_STUBS */

#if TCL_MAJOR_VERSION < 9
    typedef char tls_free_type;
#else
    typedef void tls_free_type;
#endif

/*
 * Forward declarations
 */
const Tcl_ChannelType *Tls_ChannelType(void);
Tcl_Channel     Tls_GetParent(State *statePtr, int maskFlags);

Tcl_Obj         *Tls_NewX509Obj(Tcl_Interp *interp, X509 *cert);
Tcl_Obj		*Tls_NewCAObj(Tcl_Interp *interp, const SSL *ssl, int peer);
void            Tls_Error(State *statePtr, char *msg);
void            Tls_Free(char *blockPtr);
void            Tls_Free(tls_free_type *blockPtr);
void            Tls_Clean(State *statePtr);
int             Tls_WaitForConnect(State *statePtr, int *errorCodePtr, int handshakeFailureIsPermanent);
int             Tls_DigestCommands(Tcl_Interp *interp);
int             Tls_EncryptCommands(Tcl_Interp *interp);
int             Tls_InfoCommands(Tcl_Interp *interp);
int             Tls_KDFCommands(Tcl_Interp *interp);
int             Tls_RandCommands(Tcl_Interp *interp);

BIO             *BIO_new_tcl(State* statePtr, int flags);

EVP_CIPHER	*Util_GetCipher(Tcl_Interp *interp, Tcl_Obj *cipherObj, int no_null);
EVP_MD		*Util_GetDigest(Tcl_Interp *interp, Tcl_Obj *digestObj, int no_null);
unsigned char	*Util_GetIV(Tcl_Interp *interp, Tcl_Obj *ivObj, Tcl_Size *len, int max, int no_null);
unsigned char	*Util_GetKey(Tcl_Interp *interp, Tcl_Obj *keyObj, Tcl_Size *len, char *name, int max, int no_null);
unsigned char	*Util_GetSalt(Tcl_Interp *interp, Tcl_Obj *saltObj, Tcl_Size *len, int max, int no_null);
int		Util_GetInt(Tcl_Interp *interp, Tcl_Obj *dataObj, int *value, char *name, int min, int max);
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
EVP_MAC		*Util_GetMAC(Tcl_Interp *interp, Tcl_Obj *MacObj, int no_null);
#endif

#define PTR2INT(x) ((int) ((intptr_t) (x)))

#endif /* _TLSINT_H */

 */
Tcl_Obj *Tls_x509Identifier(const ASN1_OCTET_STRING *astring) {
    Tcl_Obj *resultPtr = NULL;
    int len = 0;
    unsigned char buffer[1024];

    if (astring != NULL) {
	len = String_to_Hex((unsigned char *)ASN1_STRING_get0_data(astring),
	len = String_to_Hex((unsigned char *) ASN1_STRING_get0_data(astring),
	    ASN1_STRING_length(astring), buffer, 1024);
    }
    resultPtr = Tcl_NewStringObj((char *) &buffer[0], (Tcl_Size) len);
    return resultPtr;
}

/*

    /* Subject identifies the entity associated with the public key stored in
	the subject public key field. RFC 5280 section 4.1.2.6 */
    len = BIO_to_Buffer(X509_NAME_print_ex(bio, X509_get_subject_name(cert), 0, flags), bio, buffer, BUFSIZ);
    LAPPEND_STR(interp, certPtr, "subject", buffer, (Tcl_Size) len);

    /* SHA1 Digest (Fingerprint) of cert - DER representation */
    if (X509_digest(cert, EVP_sha1(), md, &ulen)) {
    len = String_to_Hex(md, len, (unsigned char *) buffer, BUFSIZ);
	len = String_to_Hex(md, len, (unsigned char *) buffer, BUFSIZ);
	LAPPEND_STR(interp, certPtr, "sha1_hash", buffer, (Tcl_Size) ulen);
    }

    /* SHA256 Digest (Fingerprint) of cert - DER representation */
    if (X509_digest(cert, EVP_sha256(), md, &ulen)) {
    len = String_to_Hex(md, len, (unsigned char *) buffer, BUFSIZ);
	len = String_to_Hex(md, len, (unsigned char *) buffer, BUFSIZ);
	LAPPEND_STR(interp, certPtr, "sha256_hash", buffer, (Tcl_Size) ulen);
    }

    /* Subject Public Key Info specifies the public key and identifies the
	algorithm with which the key is used. RFC 5280 section 4.1.2.7 */
    if (X509_get_signature_info(cert, &mdnid, &pknid, &bits, &xflags)) {
	ASN1_BIT_STRING *key;

    LAPPEND_STR(interp, certPtr, "purpose", Tls_x509Purpose(cert), -1);
    LAPPEND_OBJ(interp, certPtr, "certificatePurpose", Tls_x509Purposes(interp, cert));

    /* Get extensions flags */
    xflags = X509_get_extension_flags(cert);
    LAPPEND_INT(interp, certPtr, "extFlags", xflags);

	/* Check if cert was issued by CA cert issuer or self signed */
    /* Check if cert was issued by CA cert issuer or self signed */
    LAPPEND_BOOL(interp, certPtr, "selfIssued", xflags & EXFLAG_SI);
    LAPPEND_BOOL(interp, certPtr, "selfSigned", xflags & EXFLAG_SS);
    LAPPEND_BOOL(interp, certPtr, "isProxyCert", xflags & EXFLAG_PROXY);
    LAPPEND_BOOL(interp, certPtr, "extInvalid", xflags & EXFLAG_INVALID);
    LAPPEND_BOOL(interp, certPtr, "isCACert", X509_check_ca(cert));

    /* The Unique Ids are used to handle the possibility of reuse of subject
	and/or issuer names over time. RFC 5280 section 4.1.2.8 */
    {
	const ASN1_BIT_STRING *iuid, *suid;
        X509_get0_uids(cert, &iuid, &suid);
	X509_get0_uids(cert, &iuid, &suid);

	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("issuerUniqueId", -1));
	if (iuid != NULL) {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewByteArrayObj((const unsigned char *)iuid->data, (Tcl_Size) iuid->length));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}

    LAPPEND_INT(interp, certPtr, "extCount", X509_get_ext_count(cert));
    LAPPEND_OBJ(interp, certPtr, "extensions", Tls_x509Extensions(interp, cert));

    /* Authority Key Identifier (AKI) is the Subject Key Identifier (SKI) of
	its signer (the CA). RFC 5280 section 4.2.1.1, NID_authority_key_identifier */
    LAPPEND_OBJ(interp, certPtr, "authorityKeyIdentifier",
	Tls_x509Identifier(X509_get0_authority_key_id(cert)));

 
    /* Subject Key Identifier (SKI) is used to identify certificates that contain
	a particular public key. RFC 5280 section 4.2.1.2, NID_subject_key_identifier */
    LAPPEND_OBJ(interp, certPtr, "subjectKeyIdentifier",
	Tls_x509Identifier(X509_get0_subject_key_id(cert)));

    /* Key usage extension defines the purpose (e.g., encipherment, signature, certificate
	signing) of the key in the certificate. RFC 5280 section 4.2.1.3, NID_key_usage */

    /* Certificate Alias. If uses a PKCS#12 structure, alias will reflect the
	friendlyName attribute (RFC 2985). */
    {
	len = 0;
        unsigned char *string = X509_alias_get0(cert, &len);
	LAPPEND_STR(interp, certPtr, "alias", (char *) string, (Tcl_Size) len);
        string = X509_keyid_get0(cert, &len);
	string = X509_keyid_get0 (cert, &len);
	LAPPEND_STR(interp, certPtr, "keyId", (char *) string, (Tcl_Size) len);
    }

    /* Certificate and dump all data */
    {
	char certStr[CERT_STR_SIZE];

# Group,Name,Constraints,Setup,Body,Cleanup,Match,Result,Output,Error Output,Return Codes
command,package require tls,,,,,,,,,
,,,,,,,,,,
command,# Constraints,,,,,,,,,
command,source [file join [file dirname [info script]] common.tcl],,,,,,,,,
,,,,,,,,,,
command,# Helper functions,,,,,,,,,
command,"proc badssl {url} {
    set port 443
    lassign [split $url "":""] url port
    if {$port eq """"} {
        set port 443
    }
command,"proc badssl {url} {set port 443;lassign [split $url "":""] url port;if {$port eq """"} {set port 443};set cmd [list tls::socket -autoservername 1 -require 1];if {[info exists ::env(SSL_CERT_FILE)]} {lappend cmd -cafile $::env(SSL_CERT_FILE)};lappend cmd $url $port;set ch [eval $cmd];if {[catch {tls::handshake $ch} err]} {close $ch;return -code error $err} else {close $ch}}",,,,,,,,,
    set cmd [list tls::socket -autoservername 1 -require 1]
    if {[info exists ::env(SSL_CERT_FILE)]} {
        lappend cmd -cafile $::env(SSL_CERT_FILE)
    }
    lappend cmd $url $port
    set ch [eval $cmd]
    if {[catch {tls::handshake $ch} err]} {
        close $ch
	return -code error $err
    } else {
        close $ch
    }
}
",,,,,,,,,
,,,,,,,,,,
command,# BadSSL.com Tests,,,,,,,,,
BadSSL,1000-sans,,,badssl 1000-sans.badssl.com,,,"handshake failed: certificate verify failed due to ""certificate has expired""",,,1
BadSSL,10000-sans,,,badssl 10000-sans.badssl.com,,,handshake failed: excessive message size,,,1
BadSSL,3des,,,badssl 3des.badssl.com,,glob,handshake failed: * alert handshake failure,,,1
BadSSL,captive-portal,old_api,,badssl captive-portal.badssl.com,,,"handshake failed: certificate verify failed due to ""Hostname mismatch""",,,1
BadSSL,captive-portal,new_api,,badssl captive-portal.badssl.com,,,"handshake failed: certificate verify failed due to ""hostname mismatch""",,,1

package require tls

# Constraints
source [file join [file dirname [info script]] common.tcl]

# Helper functions
proc badssl {url} {
    set port 443
    lassign [split $url ":"] url port
    if {$port eq ""} {
        set port 443
    }
proc badssl {url} {set port 443;lassign [split $url ":"] url port;if {$port eq ""} {set port 443};set cmd [list tls::socket -autoservername 1 -require 1];if {[info exists ::env(SSL_CERT_FILE)]} {lappend cmd -cafile $::env(SSL_CERT_FILE)};lappend cmd $url $port;set ch [eval $cmd];if {[catch {tls::handshake $ch} err]} {close $ch;return -code error $err} else {close $ch}}
    set cmd [list tls::socket -autoservername 1 -require 1]
    if {[info exists ::env(SSL_CERT_FILE)]} {
        lappend cmd -cafile $::env(SSL_CERT_FILE)
    }
    lappend cmd $url $port
    set ch [eval $cmd]
    if {[catch {tls::handshake $ch} err]} {
        close $ch
	return -code error $err
    } else {
        close $ch
    }
}


# BadSSL.com Tests


test BadSSL-1.1 {1000-sans} -body {
	badssl 1000-sans.badssl.com
    } -result {handshake failed: certificate verify failed due to "certificate has expired"} -returnCodes {1}

# OpenSSL version
::tcltest::testConstraint OpenSSL [string match "OpenSSL*" [::tls::version]]

# Legacy OpenSSL v1.1.1 vs new v3.x
scan [lindex [split [::tls::version]] 1] %f version
::tcltest::testConstraint new_api [expr {$version >= 3.0}]
::tcltest::testConstraint old_api [expr {$version < 3.0}]

# Load legacy provider
if {$version >= 3.0} {
    tls::provider legacy
}

    # Open file with test case indo
    set in [open $filename r]
    array set cases [list]

    # Open output test file
    set out [open [format %s.test [file rootname $filename]] w]
    fconfigure $out -encoding utf-8 -translation {auto lf}
    array set cases [list]

    # Add setup commands to test file
    puts $out [format "# Auto generated test cases for %s" [file tail $filename]]
    #puts $out [format "# Auto generated test cases for %s created on %s" [file tail $filename] [clock format [clock seconds]]]

    # Package requires

# Define the object files and resource file that make up the extension.
# Note the resource file does not makes sense if doing a static library build
# hence it is under that condition. TMP_DIR is the output directory
# defined by rules for object files.
PRJ_OBJS = $(TMP_DIR)\tls.obj \
	$(TMP_DIR)\tlsBIO.obj \
	$(TMP_DIR)\tlsDigest.obj \
	$(TMP_DIR)\tlsEncrypt.obj \
	$(TMP_DIR)\tlsInfo.obj \
	$(TMP_DIR)\tlsIO.obj \
	$(TMP_DIR)\tlsKDF.obj \
	$(TMP_DIR)\tlsRand.obj \
	$(TMP_DIR)\tlsUtil.obj \
	$(TMP_DIR)\tlsX509.obj

# Define any additional project include flags
# SSL_INSTALL_FOLDER = with the OpenSSL installation folder following.
PRJ_INCLUDES = -I"$(SSL_INSTALL_FOLDER)\include" -I"$(OPENSSL_INSTALL_DIR)\include"

# Define any additional compiler flags that might be required for the project