*	tclSSL (Colin McCormack, Shared Technology)
 *	SSLtcl (Peter Antman)
 *
 */

#include "tlsInt.h"
#include "tclOpts.h"
#include <stdio.h>
#include <stdlib.h>
#include <openssl/rsa.h>

/*
 * External functions
 */

/*
 * Forward declarations
 */

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

static SSL_CTX *CTX_Init(State *statePtr, int isServer, int proto, char *key,
			char *certfile, unsigned char *key_asn1, unsigned char *cert_asn1,
			int key_asn1_len, int cert_asn1_len, char *CAdir, char *CAfile,
      char *ciphers, char *DHparams);

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

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

#ifdef OPENSSL_THREADS
#include <openssl/crypto.h>
/* Added */
#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;

# if OPENSSL_VERSION_NUMBER < 0x10100000L

void CryptoThreadLockCallback(int mode, int n, const char *file, int line) {

	if (mode & CRYPTO_LOCK) {
		/* This debugging is turned off by default -- it's too noisy. */
		/* dprintf("Called to lock (n=%i of %i)", n, locksCount); */
		Tcl_MutexLock(&locks[n]);

	ret = (unsigned long) Tcl_GetCurrentThread();

	dprintf("Returning %lu", ret);

	return(ret);
}
#endif
#endif /* OPENSSL_THREADS */
#endif /* TCL_THREADS */


/*
 *-------------------------------------------------------------------
 *

/*
 * No way to handle user-data therefore no way without a global
 * variable to access the Tcl interpreter.
*/
static int
PasswordCallback(char *buf, int size, int verify) {
    return -1;
    	buf = buf;
	size = size;
	verify = verify;
}
#else
static int
PasswordCallback(char *buf, int size, int verify, void *udata) {
    State *statePtr	= (State *) udata;

    Tcl_DecrRefCount(cmdPtr);

    Tcl_Release((ClientData) statePtr);

    if (code == TCL_OK) {
	char *ret = (char *) Tcl_GetStringResult(interp);
	if (strlen(ret) < size - 1) {
	strncpy(buf, ret, (size_t) size);
	    Tcl_Release((ClientData) interp);
	return (int)strlen(ret);
	}
    }
    Tcl_Release((ClientData) interp);
    return -1;
}
#endif

/*
 *-------------------------------------------------------------------

    SSL *ssl = NULL;
    STACK_OF(SSL_CIPHER) *sk;
    char *cp, buf[BUFSIZ];
    int index, verbose = 0;

    dprintf("Called");

    if ((objc < 2) || (objc > 3)) {
	Tcl_WrongNumArgs(interp, 1, objv, "protocol ?verbose?");
	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;
    }
    switch ((enum protocol)index) {
    case TLS_SSL2:
#if OPENSSL_VERSION_NUMBER >= 0x10101000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
		Tcl_AppendResult(interp, protocols[index], ": protocol not supported", NULL);
		return TCL_ERROR;
#else
		ctx = SSL_CTX_new(SSLv2_method()); break;
#endif
    case TLS_SSL3:
#if defined(NO_SSL3) || defined(OPENSSL_NO_SSL3)
		Tcl_AppendResult(interp, protocols[index], ": protocol not supported", NULL);
		return TCL_ERROR;
#else
		ctx = SSL_CTX_new(SSLv3_method()); break;
#endif
    case TLS_TLS1:
#if defined(NO_TLS1) || defined(OPENSSL_NO_TLS1)
		Tcl_AppendResult(interp, protocols[index], ": protocol not supported", NULL);
		return TCL_ERROR;
#else
		ctx = SSL_CTX_new(TLSv1_method()); break;
#endif
    case TLS_TLS1_1:
#if defined(NO_TLS1_1) || defined(OPENSSL_NO_TLS1_1)
		Tcl_AppendResult(interp, protocols[index], ": protocol not supported", NULL);
		return TCL_ERROR;
#else
		ctx = SSL_CTX_new(TLSv1_1_method()); break;
#endif
    case TLS_TLS1_2:
#if defined(NO_TLS1_2) || defined(OPENSSL_NO_TLS1_2)
		Tcl_AppendResult(interp, protocols[index], ": protocol not supported", NULL);
		return TCL_ERROR;
#else
		ctx = SSL_CTX_new(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", NULL);
		return TCL_ERROR;
#else
		ctx = SSL_CTX_new(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:
		break;
    }
    if (ctx == NULL) {
	Tcl_AppendResult(interp, REASON(), NULL);

	sk = SSL_get_ciphers(ssl);

	for (index = 0; index < sk_SSL_CIPHER_num(sk); index++) {
	    register size_t i;
	    SSL_CIPHER_description( sk_SSL_CIPHER_value( sk, index),
				    buf, sizeof(buf));
	    for (i = strlen(buf) - 1; i ; i--) {
		if ((buf[i] == ' ') || (buf[i] == '\n') ||
		    (buf[i] == '\r') || (buf[i] == '\t')) {
		    buf[i] = '\0';
		} else {
		    break;
		}
	    }
	    Tcl_ListObjAppendElement( interp, objPtr,
		Tcl_NewStringObj( buf, -1) );
	}
    }
    SSL_free(ssl);
    SSL_CTX_free(ctx);

    Tcl_SetObjResult( interp, objPtr);
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * HandshakeObjCmd --
 *

		dprintf("Async set and err = EAGAIN");
		ret = 0;
	} else if (ret < 0) {
		errStr = statePtr->err;
		Tcl_ResetResult(interp);
		Tcl_SetErrno(err);

		if (!errStr || (*errStr == 0)) {
			errStr = Tcl_PosixError(interp);
		}

		Tcl_AppendResult(interp, "handshake failed: ", errStr, (char *) NULL);
		dprintf("Returning TCL_ERROR with handshake failed: %s", errStr);
		return(TCL_ERROR);
	} else {
		if (err != 0) {
			dprintf("Got an error with a completed handshake: err = %i", err);
		}

		ret = 1;
	}

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

    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * ImportObjCmd --
 *

    int ssl2 = 0, ssl3 = 0;
    int tls1 = 1, tls1_1 = 1, tls1_2 = 1, tls1_3 = 1;
    int proto = 0;
    int verify = 0, require = 0, request = 1;

    dprintf("Called");

#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(OPENSSL_NO_SSL2) && defined(NO_TLS1) && defined(NO_TLS1_1) && defined(NO_TLS1_2) && defined(NO_TLS1_3) && defined(NO_SSL3) && !defined(NO_SSL2)
    ssl2 = 1;
#endif
#if !defined(OPENSSL_NO_SSL3) && defined(NO_TLS1) && defined(NO_TLS1_1) && defined(NO_TLS1_2) && defined(NO_TLS1_3) && defined(NO_SSL2) && !defined(NO_SSL3)
    ssl3 = 1;
#endif
#if defined(NO_TLS1) || defined(OPENSSL_NO_TLS1)
    tls1 = 0;
#endif
#if defined(NO_TLS1_1) || defined(OPENSSL_NO_TLS1_1)
    tls1_1 = 0;
#endif
#if defined(NO_TLS1_2) || defined(OPENSSL_NO_TLS1_2)
    tls1_2 = 0;
#endif
#if defined(NO_TLS1_3) || defined(OPENSSL_NO_TLS1_3)
    tls1_3 = 0;
#endif

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "channel ?options?");
	return TCL_ERROR;
    }

	OPTSTR( "-keyfile", keyfile);
	OPTSTR( "-model", model);
	OPTOBJ( "-password", password);
	OPTBOOL( "-require", require);
	OPTBOOL( "-request", request);
	OPTBOOL( "-server", server);
#ifndef OPENSSL_NO_TLSEXT
        OPTSTR( "-servername", servername);
	OPTOBJ( "-alpn", alpn);
#endif

	OPTBOOL( "-ssl2", ssl2);
	OPTBOOL( "-ssl3", ssl3);
	OPTBOOL( "-tls1", tls1);
	OPTBOOL( "-tls1.1", tls1_1);
	OPTBOOL( "-tls1.2", tls1_2);
	OPTBOOL( "-tls1.3", tls1_3);
  OPTBYTE("-cert", cert, cert_len);
  OPTBYTE("-key", key, key_len);

	OPTBAD( "option", "-alpn, -cadir, -cafile, -cert, -certfile, -cipher, -command, -dhparams, -key, -keyfile, -model, -password, -require, -request, -server, -servername, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, or -tls1.3");

	return TCL_ERROR;
    }
    if (request)	    verify |= SSL_VERIFY_CLIENT_ONCE | SSL_VERIFY_PEER;
    if (request && require) verify |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
    if (verify == 0)	verify = SSL_VERIFY_NONE;

	/* Get the "model" context */
	chan = Tcl_GetChannel(interp, model, &mode);
	if (chan == (Tcl_Channel) NULL) {
	    Tls_Free((char *) 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", NULL);
	    Tls_Free((char *) statePtr);
	    return TCL_ERROR;
	}
	ctx = ((State *)Tcl_GetChannelInstanceData(chan))->ctx;

		(char *) NULL);
	Tls_Free((char *) statePtr);
	return TCL_ERROR;
    }

#ifndef OPENSSL_NO_TLSEXT
    if (servername) {
        if (!SSL_set_tlsext_host_name(statePtr->ssl, servername) && require) {
            Tcl_AppendResult(interp, "setting TLS host name extension failed",
                (char *) NULL);
            Tls_Free((char *) statePtr);
            return TCL_ERROR;
        }
    }
    if (alpn) {
	/* Convert a Tcl list into a protocol-list in wire-format */
	unsigned char *protos, *p;
	unsigned int protoslen = 0;
	int i, len, cnt;
	Tcl_Obj **list;

    /*
     * End of SSL Init
     */
    dprintf("Returning %s", Tcl_GetChannelName(statePtr->self));
    Tcl_SetResult(interp, (char *) Tcl_GetChannelName(statePtr->self),
	    TCL_VOLATILE);
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * UnimportObjCmd --
 *

    }

    if (Tcl_UnstackChannel(interp, chan) == TCL_ERROR) {
	return TCL_ERROR;
    }

    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * CTX_Init -- construct a SSL_CTX instance
 *

    if (!proto) {
	Tcl_AppendResult(interp, "no valid protocol selected", NULL);
	return (SSL_CTX *)0;
    }

    /* create SSL context */
#if OPENSSL_VERSION_NUMBER >= 0x10101000L || defined(NO_SSL2) || defined(OPENSSL_NO_SSL2)
    if (ENABLED(proto, TLS_PROTO_SSL2)) {
	Tcl_AppendResult(interp, "SSL2 protocol not supported", NULL);
	return (SSL_CTX *)0;
    }
#endif
#if defined(NO_SSL3) || defined(OPENSSL_NO_SSL3)
    if (ENABLED(proto, TLS_PROTO_SSL3)) {
	Tcl_AppendResult(interp, "SSL3 protocol not supported", NULL);
	return (SSL_CTX *)0;
    }
#endif
#if defined(NO_TLS1) || defined(OPENSSL_NO_TLS1)
    if (ENABLED(proto, TLS_PROTO_TLS1)) {
	Tcl_AppendResult(interp, "TLS 1.0 protocol not supported", NULL);
	return (SSL_CTX *)0;
    }
#endif
#if defined(NO_TLS1_1) || defined(OPENSSL_NO_TLS1_1)
    if (ENABLED(proto, TLS_PROTO_TLS1_1)) {
	Tcl_AppendResult(interp, "TLS 1.1 protocol not supported", NULL);
	return (SSL_CTX *)0;
    }
#endif
#if defined(NO_TLS1_2) || defined(OPENSSL_NO_TLS1_2)
    if (ENABLED(proto, TLS_PROTO_TLS1_2)) {
	Tcl_AppendResult(interp, "TLS 1.2 protocol not supported", NULL);
	return (SSL_CTX *)0;
    }
#endif
#if defined(NO_TLS1_3) || defined(OPENSSL_NO_TLS1_3)
    if (ENABLED(proto, TLS_PROTO_TLS1_3)) {
	Tcl_AppendResult(interp, "TLS 1.3 protocol not supported", NULL);
	return (SSL_CTX *)0;
    }
#endif

    switch (proto) {
#if OPENSSL_VERSION_NUMBER < 0x10101000L && !defined(NO_SSL2) && !defined(OPENSSL_NO_SSL2)
    case TLS_PROTO_SSL2:
	method = SSLv2_method();
	break;
#endif
#if !defined(NO_SSL3) && !defined(OPENSSL_NO_SSL3)
    case TLS_PROTO_SSL3:
	method = SSLv3_method();
	break;
#endif
#if !defined(NO_TLS1) && !defined(OPENSSL_NO_TLS1)
    case TLS_PROTO_TLS1:
	method = TLSv1_method();
	break;
#endif
#if !defined(NO_TLS1_1) && !defined(OPENSSL_NO_TLS1_1)
    case TLS_PROTO_TLS1_1:
	method = TLSv1_1_method();
	break;
#endif
#if !defined(NO_TLS1_2) && !defined(OPENSSL_NO_TLS1_2)
    case TLS_PROTO_TLS1_2:
	method = TLSv1_2_method();
	break;
#endif
#if !defined(NO_TLS1_3) && !defined(OPENSSL_NO_TLS1_3)
    case TLS_PROTO_TLS1_3:
        /*
         * The version range is constrained below,
         * after the context is created.  Use the
         * generic method here.
         */
	method = TLS_method();
	break;
#endif
    default:
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
	/* Negotiate highest available SSL/TLS version */
        method = TLS_method();
#else
        method = SSLv23_method();
#endif
#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(NO_SSL2) && !defined(OPENSSL_NO_SSL2)
	off |= (ENABLED(proto, TLS_PROTO_SSL2)   ? 0 : SSL_OP_NO_SSLv2);
#endif
#if !defined(NO_SSL3) && !defined(OPENSSL_NO_SSL3)
	off |= (ENABLED(proto, TLS_PROTO_SSL3)   ? 0 : SSL_OP_NO_SSLv3);
#endif
#if !defined(NO_TLS1) && !defined(OPENSSL_NO_TLS1)
	off |= (ENABLED(proto, TLS_PROTO_TLS1)   ? 0 : SSL_OP_NO_TLSv1);
#endif
#if !defined(NO_TLS1_1) && !defined(OPENSSL_NO_TLS1_1)
	off |= (ENABLED(proto, TLS_PROTO_TLS1_1) ? 0 : SSL_OP_NO_TLSv1_1);
#endif
#if !defined(NO_TLS1_2) && !defined(OPENSSL_NO_TLS1_2)
	off |= (ENABLED(proto, TLS_PROTO_TLS1_2) ? 0 : SSL_OP_NO_TLSv1_2);
#endif
#if !defined(NO_TLS1_3) && !defined(OPENSSL_NO_TLS1_3)
	off |= (ENABLED(proto, TLS_PROTO_TLS1_3) ? 0 : SSL_OP_NO_TLSv1_3);
#endif
	break;
    }
    
    ctx = SSL_CTX_new(method);

    if (!ctx) {
        return(NULL);
    }

    if (getenv(SSLKEYLOGFILE)) {
	SSL_CTX_set_keylog_callback(ctx, KeyLogCallback);
    }

#if !defined(NO_TLS1_3) && !defined(OPENSSL_NO_TLS1_3)
    if (proto == TLS_PROTO_TLS1_3) {
        SSL_CTX_set_min_proto_version(ctx, TLS1_3_VERSION);
        SSL_CTX_set_max_proto_version(ctx, TLS1_3_VERSION);
    }
#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, off);	/* all SSL bug workarounds */
#if OPENSSL_VERSION_NUMBER < 0x10101000L
    SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);	/* handle new handshakes in background */
#endif
    SSL_CTX_sess_set_cache_size( ctx, 128);

    if (ciphers != NULL)
	SSL_CTX_set_cipher_list(ctx, ciphers);

    /* set some callbacks */
    SSL_CTX_set_default_passwd_cb(ctx, PasswordCallback);

	return (SSL_CTX *)0;
#endif
    }

    /* https://sourceforge.net/p/tls/bugs/57/ */
    /* XXX:TODO: Let the user supply values here instead of something that exists on the filesystem */
    if ( CAfile != NULL ) {
        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);
    Tcl_DStringFree(&ds1);

    Tcl_ListObjAppendElement (interp, objPtr,
	    Tcl_NewStringObj ("sbits", -1));
    Tcl_ListObjAppendElement (interp, objPtr,
	    Tcl_NewIntObj (SSL_get_cipher_bits (statePtr->ssl, NULL)));

    ciphers = (char*)SSL_get_cipher(statePtr->ssl);
    if ((ciphers != NULL) && (strcmp(ciphers, "(NONE)") != 0)) {
	Tcl_ListObjAppendElement(interp, objPtr,
		Tcl_NewStringObj("cipher", -1));
	Tcl_ListObjAppendElement(interp, objPtr,
		Tcl_NewStringObj(SSL_get_cipher(statePtr->ssl), -1));
    }

#ifndef OPENSSL_NO_TLSEXT

    Tcl_ListObjAppendElement(interp, objPtr,
	Tcl_NewStringObj("version", -1));
    Tcl_ListObjAppendElement(interp, objPtr,
	Tcl_NewStringObj(SSL_get_version(statePtr->ssl), -1));

    Tcl_SetObjResult( interp, objPtr);
    return TCL_OK;
    	clientData = clientData;
}

/*
 *-------------------------------------------------------------------
 *
 * VersionObjCmd -- return version string from OpenSSL.
 *

    dprintf("Called");

    objPtr = Tcl_NewStringObj(OPENSSL_VERSION_TEXT, -1);

    Tcl_SetObjResult(interp, objPtr);
    return TCL_OK;
    	clientData = clientData;
    	objc = objc;
    	objv = objv;
}

/*
 *-------------------------------------------------------------------
 *
 * MiscObjCmd -- misc commands
 *

	    int listc,i;

	    BIO *out=NULL;

	    char *k_C="",*k_ST="",*k_L="",*k_O="",*k_OU="",*k_CN="",*k_Email="";
	    char *keyout,*pemout,*str;
	    int keysize,serial=0,days=365;

#if OPENSSL_VERSION_NUMBER <= 0x10100000L
	    RSA *rsa = NULL;
#elif OPENSSL_VERSION_NUMBER < 0x30000000L
	    BIGNUM *bne = NULL;
	    RSA *rsa = NULL;
#else
	    EVP_PKEY_CTX *ctx = NULL;    
#endif

	    if ((objc<5) || (objc>6)) {
		Tcl_WrongNumArgs(interp, 2, objv, "keysize keyfile certfile ?info?");
		return TCL_ERROR;
	    }

	    if (Tcl_GetIntFromObj(interp, objv[2], &keysize) != TCL_OK) {

			k_Email=Tcl_GetString(listv[i+1]);
		    } else {
			Tcl_SetResult(interp,"Unknown parameter",NULL);
			return TCL_ERROR;
		    }
		}
	    }

#if OPENSSL_VERSION_NUMBER <= 0x10100000L
	    pkey = EVP_PKEY_new();

	    rsa = RSA_generate_key(keysize, 0x10001, NULL, NULL);
	    if (pkey == NULL || rsa == NULL || !EVP_PKEY_assign_RSA(pkey, rsa)) {
		EVP_PKEY_free(pkey);
		/* RSA_free(rsa); freed by EVP_PKEY_free */
#elif OPENSSL_VERSION_NUMBER < 0x30000000L
	    bne = BN_new();
	    rsa = RSA_new();
	    pkey = EVP_PKEY_new();
	    if (bne == NULL || rsa == NULL || pkey == NULL || !BN_set_word(bne,RSA_F4) || 
		!RSA_generate_key_ex(rsa, keysize, bne, NULL) || !EVP_PKEY_assign_RSA(pkey, rsa)) {
		EVP_PKEY_free(pkey);
		/* RSA_free(rsa); freed by EVP_PKEY_free */
		BN_free(bne);
#else
	    pkey = EVP_RSA_gen((unsigned int) keysize);
	    ctx = EVP_PKEY_CTX_new(pkey,NULL);
	    if (pkey == NULL || ctx == NULL || !EVP_PKEY_keygen_init(ctx) || 
		!EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, keysize) || !EVP_PKEY_keygen(ctx, &pkey)) {
		EVP_PKEY_free(pkey);
		EVP_PKEY_CTX_free(ctx);
#endif
		Tcl_SetResult(interp,"Error generating private key",NULL);
		return TCL_ERROR;

	    } else {
		if (isStr) {
		    out=BIO_new(BIO_s_mem());
		    PEM_write_bio_PrivateKey(out,pkey,NULL,NULL,0,NULL,NULL);
		    i=BIO_read(out,buffer,sizeof(buffer)-1);
		    i=(i<0) ? 0 : i;
		    buffer[i]='\0';
		    Tcl_SetVar(interp,keyout,buffer,0);
		    BIO_flush(out);
		    BIO_free(out);
		} else {
		    out=BIO_new(BIO_s_file());
		    BIO_write_filename(out,keyout);
		    PEM_write_bio_PrivateKey(out,pkey,NULL,NULL,0,NULL,NULL);
		    /* PEM_write_bio_RSAPrivateKey(out, rsa, NULL, NULL, 0, NULL, NULL); */
		    BIO_free_all(out);
	 	}

		if ((cert=X509_new())==NULL) {
		    Tcl_SetResult(interp,"Error generating certificate request",NULL);
		    EVP_PKEY_free(pkey);
#if OPENSSL_VERSION_NUMBER > 0x10100000L && OPENSSL_VERSION_NUMBER < 0x30000000L
		    BN_free(bne);
#endif
		    return(TCL_ERROR);
		}

		X509_set_version(cert,2);
		ASN1_INTEGER_set(X509_get_serialNumber(cert),serial);
#if OPENSSL_VERSION_NUMBER < 0x10100000L
		X509_gmtime_adj(X509_get_notBefore(cert),0);
		X509_gmtime_adj(X509_get_notAfter(cert),(long)60*60*24*days);
#else
		X509_gmtime_adj(X509_getm_notBefore(cert),0);
		X509_gmtime_adj(X509_getm_notAfter(cert),(long)60*60*24*days);
#endif
		X509_set_pubkey(cert,pkey);
		
		name=X509_get_subject_name(cert);

		X509_NAME_add_entry_by_txt(name,"C", MBSTRING_ASC, (const unsigned char *) k_C, -1, -1, 0);
		X509_NAME_add_entry_by_txt(name,"ST", MBSTRING_ASC, (const unsigned char *) k_ST, -1, -1, 0);
		X509_NAME_add_entry_by_txt(name,"L", MBSTRING_ASC, (const unsigned char *) k_L, -1, -1, 0);
		X509_NAME_add_entry_by_txt(name,"O", MBSTRING_ASC, (const unsigned char *) k_O, -1, -1, 0);
		X509_NAME_add_entry_by_txt(name,"OU", MBSTRING_ASC, (const unsigned char *) k_OU, -1, -1, 0);
		X509_NAME_add_entry_by_txt(name,"CN", MBSTRING_ASC, (const unsigned char *) k_CN, -1, -1, 0);
		X509_NAME_add_entry_by_txt(name,"Email", MBSTRING_ASC, (const unsigned char *) k_Email, -1, -1, 0);

		X509_set_subject_name(cert,name);

		if (!X509_sign(cert,pkey,EVP_sha256())) {
		    X509_free(cert);
		    EVP_PKEY_free(pkey);
#if OPENSSL_VERSION_NUMBER > 0x10100000L && OPENSSL_VERSION_NUMBER < 0x30000000L
		    BN_free(bne);
#endif
		    Tcl_SetResult(interp,"Error signing certificate",NULL);
		    return TCL_ERROR;
		}

		if (isStr) {
		    out=BIO_new(BIO_s_mem());
		    PEM_write_bio_X509(out,cert);

		    BIO_write_filename(out,pemout);
		    PEM_write_bio_X509(out,cert);
		    BIO_free_all(out);
		}

		X509_free(cert);
		EVP_PKEY_free(pkey);
#if OPENSSL_VERSION_NUMBER > 0x10100000L && OPENSSL_VERSION_NUMBER < 0x30000000L
		BN_free(bne);

#endif
	    }
	}
	break;
    default:
	break;
    }
    return TCL_OK;

 *
 *-------------------------------------------------------------------
 */

DLLEXPORT int Tls_Init(Tcl_Interp *interp) {
	const char tlsTclInitScript[] = {
#include "tls.tcl.h"
            0x00
	};

        dprintf("Called");

	/*
	 * We only support Tcl 8.4 or newer
	 */
	if (
#ifdef USE_TCL_STUBS
	    Tcl_InitStubs(interp, "8.4", 0)

		}

		dprintf("Asked to uninitialize");

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

#if OPENSSL_VERSION_NUMBER < 0x10000000L
		CRYPTO_set_locking_callback(NULL);
		CRYPTO_set_id_callback(NULL);
#elif OPENSSL_VERSION_NUMBER < 0x10100000L
		CRYPTO_set_locking_callback(NULL);
		CRYPTO_THREADID_set_callback(NULL)
#endif

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

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

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
#if OPENSSL_VERSION_NUMBER < 0x10100000L
	num_locks = CRYPTO_num_locks();
#else
	num_locks = 1;
#endif
	locksCount = (int) num_locks;
	locks = malloc(sizeof(*locks) * num_locks);
	memset(locks, 0, sizeof(*locks) * num_locks);

#if OPENSSL_VERSION_NUMBER < 0x10000000L
	CRYPTO_set_locking_callback(CryptoThreadLockCallback);
	CRYPTO_set_id_callback(CryptoThreadIdCallback);
#elif OPENSSL_VERSION_NUMBER < 0x10100000L
	CRYPTO_set_locking_callback(CryptoThreadLockCallback);
	CRYPTO_THREADID_set_callback(CryptoThreadIdCallback)
#endif
#endif

# if OPENSSL_VERSION_NUMBER < 0x10100000L
	if (SSL_library_init() != 1) {
		status = TCL_ERROR;
		goto done;
	}
#else
	/* 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);
#endif

# if OPENSSL_VERSION_NUMBER < 0x10100000L
	SSL_load_error_strings();
	ERR_load_crypto_strings();
#else
	/* Only initialize libcrypto  */
	OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
#endif

	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

	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 OPENSSL_VERSION_NUMBER < 0x10100000L
done:
#endif
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
	Tcl_MutexUnlock(&init_mx);
#endif

	return(status);
}