/*
 * Copyright (C) 1997-1999 Matt Newman <matt@novadigm.com>
 * Copyright (C) 2000 Ajuba Solutions
 *
 * $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.c,v 1.12 2000/08/18 19:22:25 hobbs Exp $
 *
 * TLS (aka SSL) Channel - can be layered on any bi-directional
 * Tcl_Channel (Note: Requires Trf Core Patch)
 *
 * This was built (almost) from scratch based upon observation of
 * OpenSSL 0.9.2B
 *
 * Addition credit is due for Andreas Kupries (a.kupries@westend.com), for
 * providing the Tcl_ReplaceChannel mechanism and working closely with me
 * to enhance it to support full fileevent semantics.
 *
 * Also work done by the follow people provided the impetus to do this "right":
 *	tclSSL (Colin McCormack, Shared Technology)
 *	SSLtcl (Peter Antman)
 *
 */

#include "tlsInt.h"
#include "tclOpts.h"
#include <stdlib.h>

/*
 * External functions
 */

/*
 * Forward declarations

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


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

    cmdPtr = Tcl_DuplicateObj(statePtr->callback);

#if 0

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

int
Tls_Init(Tcl_Interp *interp)		/* Interpreter in which the package is
                                         * to be made available. */
{
    int major, minor, patchlevel, release, i;
    char rnd_seed[16] = "GrzSlplKqUdnnzP!";	/* 16 bytes */

    /*
     * The original 8.2.0 stacked channel implementation (and the patch
     * that preceded it) had problems with scalability and robustness.
     * These were address in 8.3.2 / 8.4a2, so we now require that as a
     * minimum for TLS 1.4+.  We only support 8.2+ now (8.3.2+ preferred).
     */

    if (SSL_library_init() != 1) {
        Tcl_AppendResult(interp, "could not initialize SSL library", NULL);
	return TCL_ERROR;
    }
    SSL_load_error_strings();
    ERR_load_crypto_strings();

    /*
     * Seed the random number generator in the SSL library
     */
    srand((unsigned int) time((time_t *) NULL));
    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));

    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,