*/

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

static void	InfoCallback _ANSI_ARGS_ ((CONST SSL *ssl, int where, int ret));
static void	InfoCallback(CONST SSL *ssl, int where, int ret);

static int	CiphersObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	CiphersObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	HandshakeObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	HandshakeObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	ImportObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	ImportObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	StatusObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	StatusObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	VersionObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	VersionObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	MiscObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	MiscObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static int	UnimportObjCmd _ANSI_ARGS_ ((ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int	UnimportObjCmd(ClientData clientData,
			Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

static SSL_CTX *CTX_Init _ANSI_ARGS_((State *statePtr, int proto, char *key,
static SSL_CTX *CTX_Init(State *statePtr, int proto, char *key,
			char *cert, char *CAdir, char *CAfile, char *ciphers,
			char *DHparams));
			char *DHparams);

static int	TlsLibInit _ANSI_ARGS_ ((void)) ;
static int	TlsLibInit(void);

#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 ENABLED(flag, mask)	(((flag) & (mask)) == (mask))

 *
 * Side effects:
 *	 create the ssl command, initialise ssl context
 *
 *-------------------------------------------------------------------
 */

int
Tls_Init(Tcl_Interp *interp)		/* Interpreter in which the package is
int Tls_Init(Tcl_Interp *interp) {
					 * to be made available. */
{
    const char tlsTclInitScript[] = {
	const char tlsTclInitScript[] = {
#include "tls.tcl.h"
    };
	};

    /*
     * We only support Tcl 8.4 or newer
     */
    if (
	/*
	 * We only support Tcl 8.4 or newer
	 */
	if (
#ifdef USE_TCL_STUBS
	Tcl_InitStubs(interp, "8.4", 0)
	    Tcl_InitStubs(interp, "8.4", 0)
#else
	Tcl_PkgRequire(interp, "Tcl", "8.4", 0)
	    Tcl_PkgRequire(interp, "Tcl", "8.4", 0)
#endif
	== NULL) {
	return TCL_ERROR;
    }
	     == NULL) {
		return TCL_ERROR;
	}

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

    Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "tls::import", ImportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "tls::unimport", UnimportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "tls::status", StatusObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "tls::version", VersionObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "tls::misc", MiscObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::import", ImportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::unimport", UnimportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::status", StatusObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::version", VersionObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
	Tcl_CreateObjCommand(interp, "tls::misc", MiscObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    if (interp) {
        Tcl_Eval(interp, tlsTclInitScript);
    }
	if (interp) {
		Tcl_Eval(interp, tlsTclInitScript);
	}

    return Tcl_PkgProvide(interp, "tls", PACKAGE_VERSION);
	return(Tcl_PkgProvide(interp, "tls", PACKAGE_VERSION));
}


/*
 *------------------------------------------------------*
 *
 *	Tls_SafeInit --
 *
 *	------------------------------------------------*
 *	Standard procedure required by 'load'. 
 *	Initializes this extension for a safe interpreter.
 *	------------------------------------------------*
 *
 *	Sideeffects:
 *		As of 'Tls_Init'
 *
 *	Result:
 *		A standard Tcl error code.
 *
 *------------------------------------------------------*
 */

int
Tls_SafeInit (Tcl_Interp* interp)
int Tls_SafeInit(Tcl_Interp *interp) {
{
    return Tls_Init (interp);
	return(Tls_Init(interp));
}


/*
 *------------------------------------------------------*
 *
 *	TlsLibInit --
 *
 *	------------------------------------------------*
 *	Initializes SSL library once per application
 *	------------------------------------------------*
 *
 *	Side effects:
 *		initilizes SSL library
 *
 *	Result:
 *		none
 *
 *------------------------------------------------------*
 */
static int TlsLibInit (void) {
    static int initialized = 0;
static int TlsLibInit(void) {
	static int initialized = 0;
    int i;
    char rnd_seed[16] = "GrzSlplKqUdnnzP!";	/* 16 bytes */
    int status = TCL_OK;
	int status = TCL_OK;

    if (initialized) {
        return(status);
    }
    initialized = 1;
	if (initialized) {
		return(status);
	}

	initialized = 1;

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
    size_t num_locks;
	size_t num_locks;

    Tcl_MutexLock(&init_mx);
	Tcl_MutexLock(&init_mx);
#endif

#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
    /* should we consider allocating mutexes? */
    num_locks = CRYPTO_num_locks();
    if (num_locks > CRYPTO_NUM_LOCKS) {
	status = TCL_ERROR;
	goto done;
    }
	/* should we consider allocating mutexes? */
	num_locks = CRYPTO_num_locks();
	if (num_locks > CRYPTO_NUM_LOCKS) {
		status = TCL_ERROR;
		goto done;
	}

    CRYPTO_set_locking_callback(CryptoThreadLockCallback);
    CRYPTO_set_id_callback(CryptoThreadIdCallback);
	CRYPTO_set_locking_callback(CryptoThreadLockCallback);
	CRYPTO_set_id_callback(CryptoThreadIdCallback);
#endif

    if (SSL_library_init() != 1) {
    	status = TCL_ERROR;
	goto done;
    }
    SSL_load_error_strings();
    ERR_load_crypto_strings();
	if (SSL_library_init() != 1) {
		status = TCL_ERROR;
		goto done;
	}

	SSL_load_error_strings();
	ERR_load_crypto_strings();

#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);
done:
#endif

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

    return status;
	return(status);
}