/* ssl/ssl_task.c */

 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

  * All rights reserved.

  *

  * This package is an SSL implementation written

  * by Eric Young (eay@cryptsoft.com).

  * The implementation was written so as to conform with Netscapes SSL.

  * 

  * This library is free for commercial and non-commercial use as long as

  * the following conditions are aheared to.  The following conditions

  * apply to all code found in this distribution, be it the RC4, RSA,

  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

  * included with this distribution is covered by the same copyright terms

  * except that the holder is Tim Hudson (tjh@cryptsoft.com).

  * 

  * Copyright remains Eric Young's, and as such any Copyright notices in

  * the code are not to be removed.

  * If this package is used in a product, Eric Young should be given attribution

  * as the author of the parts of the library used.

  * This can be in the form of a textual message at program startup or

  * in documentation (online or textual) provided with the package.

  * 

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 1. Redistributions of source code must retain the copyright

  *    notice, this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in the

  *    documentation and/or other materials provided with the distribution.

  * 3. All advertising materials mentioning features or use of this software

  *    must display the following acknowledgement:

  *    "This product includes cryptographic software written by

  *     Eric Young (eay@cryptsoft.com)"

  *    The word 'cryptographic' can be left out if the rouines from the library

  *    being used are not cryptographic related :-).

  * 4. If you include any Windows specific code (or a derivative thereof) from 

  *    the apps directory (application code) you must include an acknowledgement:

  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

  * 

  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  * SUCH DAMAGE.

  * 

  * The licence and distribution terms for any publically available version or

  * derivative of this code cannot be changed.  i.e. this code cannot simply be

  * copied and put under another distribution licence

  * [including the GNU Public Licence.]

  */

 /* VMS */

 /*

  * DECnet object for servicing SSL.  We accept the inbound and speak a

  * simple protocol for multiplexing the 2 data streams (application and

  * ssl data) over this logical link.

  *

  * Logical names:

  *    SSL_CIPHER	Defines a list of cipher specifications the server

  *			will support in order of preference.

  *    SSL_SERVER_CERTIFICATE

  *			Points to PEM (privacy enhanced mail) file that

  *			contains the server certificate and private password.

  *    SYS$NET		Logical created by netserver.exe as hook for completing

  *			DECnet logical link.

  *

  * Each NSP message sent over the DECnet link has the following structure:

  *    struct rpc_msg { 

  *      char channel;

  *      char function;

  *      short length;

  *      char data[MAX_DATA];

  *    } msg;

  *

  * The channel field designates the virtual data stream this message applies

  * to and is one of:

  *   A - Application data (payload).

  *   R - Remote client connection that initiated the SSL connection.  Encrypted

  *       data is sent over this connection.

  *   G - General data, reserved for future use.

  *

  * The data streams are half-duplex read/write and have following functions:

  *   G - Get, requests that up to msg.length bytes of data be returned.  The

  *       data is returned in the next 'C' function response that matches the

  *       requesting channel.

  *   P - Put, requests that the first msg.length bytes of msg.data be appended

  *       to the designated stream.

  *   C - Confirms a get or put.  Every get and put will get a confirm response,

  *       you cannot initiate another function on a channel until the previous

  *       operation has been confirmed.

  *

  *  The 2 channels may interleave their operations, for example:

  *        Server msg           Client msg

  *         A, Get, 4092          ---->

  *                               <----  R, get, 4092

  *         R, Confirm, {hello}   ---->

  *                               <----  R, put, {srv hello}

  *         R, Confirm, 0         ---->

  *                               .		(SSL handshake completed)

  *                               .              (read first app data).

  *                               <----  A, confirm, {http data}

  *         A, Put, {http data}   ---->

  *                               <----  A, confirm, 0

  *

  *  The length field is not permitted to be larger that 4092 bytes.

  *

  * Author: Dave Jones

  * Date:   22-JUL-1996

  */

 #include <stdlib.h>

 #include <stdio.h>

 #include <iodef.h>		/* VMS IO$_ definitions */

 #include <descrip.h>		/* VMS string descriptors */

 extern int SYS$QIOW(), SYS$ASSIGN();

 int LIB$INIT_TIMER(), LIB$SHOW_TIMER();

 #include <string.h>		/* from ssltest.c */

 #include <errno.h>

 #include "e_os.h"

 #include <openssl/buffer.h>

 #include <openssl/x509.h>

 #include <openssl/ssl.h>

 #include <openssl/err.h>

 int MS_CALLBACK verify_callback(int ok, X509 *xs, X509 *xi, int depth,

 	int error);

 BIO *bio_err=NULL;

 BIO *bio_stdout=NULL;

 BIO_METHOD *BIO_s_rtcp();

 static char *cipher=NULL;

 int verbose=1;

 #ifdef FIONBIO

 static int s_nbio=0;

 #endif

 #define TEST_SERVER_CERT "SSL_SERVER_CERTIFICATE"

 /*************************************************************************/

 struct rpc_msg {		/* Should have member alignment inhibited */

    char channel;		/* 'A'-app data. 'R'-remote client 'G'-global */

    char function;		/* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */

    unsigned short int length;	/* Amount of data returned or max to return */

    char data[4092];		/* variable data */

 };

 #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)

 static $DESCRIPTOR(sysnet, "SYS$NET");

 typedef unsigned short io_channel;

 struct io_status {

     unsigned short status;

     unsigned short count;

     unsigned long stsval;

 };

 int doit(io_channel chan, SSL_CTX *s_ctx );

 /*****************************************************************************/

 /* Decnet I/O routines.

  */

 static int get ( io_channel chan, char *buffer, int maxlen, int *length )

 {

     int status;

     struct io_status iosb;

     status = SYS$QIOW ( 0, chan, IO$_READVBLK, &iosb, 0, 0,

 	buffer, maxlen, 0, 0, 0, 0 );

     if ( (status&1) == 1 ) status = iosb.status;

     if ( (status&1) == 1 ) *length = iosb.count;

     return status;

 }

 static int put ( io_channel chan, char *buffer, int length )

 {

     int status;

     struct io_status iosb;

     status = SYS$QIOW ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,

 	buffer, length, 0, 0, 0, 0 );

     if ( (status&1) == 1 ) status = iosb.status;

     return status;

 }

 /***************************************************************************/

 /* Handle operations on the 'G' channel.

  */

 static int general_request ( io_channel chan, struct rpc_msg *msg, int length )

 {

     return 48;

 }

 /***************************************************************************/

 int main ( int argc, char **argv )

 {

     int status, length;

     io_channel chan;

     struct rpc_msg msg;

 	char *CApath=NULL,*CAfile=NULL;

 	int badop=0;

 	int ret=1;

 	int client_auth=0;

 	int server_auth=0;

 	SSL_CTX *s_ctx=NULL;

     /*

      * Confirm logical link with initiating client.

      */

     LIB$INIT_TIMER();

     status = SYS$ASSIGN ( &sysnet, &chan, 0, 0, 0 );

     printf("status of assign to SYS$NET: %d\n", status );

     /*

      * Initialize standard out and error files.

      */

 	if (bio_err == NULL)

 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)

 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE);

 	if (bio_stdout == NULL)

 		if ((bio_stdout=BIO_new(BIO_s_file())) != NULL)

 			BIO_set_fp(bio_stdout,stdout,BIO_NOCLOSE);

     /*

      * get the preferred cipher list and other initialization

      */

 	if (cipher == NULL) cipher=getenv("SSL_CIPHER");

 	printf("cipher list: %s\n", cipher ? cipher : "{undefined}" );

 	SSL_load_error_strings();

 	OpenSSL_add_all_algorithms();

 /* DRM, this was the original, but there is no such thing as SSLv2()

 	s_ctx=SSL_CTX_new(SSLv2());

 */

 	s_ctx=SSL_CTX_new(SSLv2_server_method());

 	if (s_ctx == NULL) goto end;

 	SSL_CTX_use_certificate_file(s_ctx,TEST_SERVER_CERT,SSL_FILETYPE_PEM);

 	SSL_CTX_use_RSAPrivateKey_file(s_ctx,TEST_SERVER_CERT,SSL_FILETYPE_PEM);

 	printf("Loaded server certificate: '%s'\n", TEST_SERVER_CERT );

     /*

      * Take commands from client until bad status.

      */

     LIB$SHOW_TIMER();

     status = doit ( chan, s_ctx );

     LIB$SHOW_TIMER();

     /*

      * do final cleanup and exit.

      */

 end:

 	if (s_ctx != NULL) SSL_CTX_free(s_ctx);

     LIB$SHOW_TIMER();

     return 1;

 }

 int doit(io_channel chan, SSL_CTX *s_ctx )

 {

     int status, length, link_state;

      struct rpc_msg msg;

 	SSL *s_ssl=NULL;

 	BIO *c_to_s=NULL;

 	BIO *s_to_c=NULL;

 	BIO *c_bio=NULL;

 	BIO *s_bio=NULL;

 	int i;

 	int done=0;

 	s_ssl=SSL_new(s_ctx);

 	if (s_ssl == NULL) goto err;

 	c_to_s=BIO_new(BIO_s_rtcp());

 	s_to_c=BIO_new(BIO_s_rtcp());

 	if ((s_to_c == NULL) || (c_to_s == NULL)) goto err;

 /* original, DRM 24-SEP-1997

 	BIO_set_fd ( c_to_s, "", chan );

 	BIO_set_fd ( s_to_c, "", chan );

 */

 	BIO_set_fd ( c_to_s, 0, chan );

 	BIO_set_fd ( s_to_c, 0, chan );

 	c_bio=BIO_new(BIO_f_ssl());

 	s_bio=BIO_new(BIO_f_ssl());

 	if ((c_bio == NULL) || (s_bio == NULL)) goto err;

 	SSL_set_accept_state(s_ssl);

 	SSL_set_bio(s_ssl,c_to_s,s_to_c);

 	BIO_set_ssl(s_bio,s_ssl,BIO_CLOSE);

 	/* We can always do writes */

 	printf("Begin doit main loop\n");

 	/*

 	 * Link states: 0-idle, 1-read pending, 2-write pending, 3-closed.

 	 */

 	for (link_state = 0; link_state < 3; ) {

 	    /*

 	     * Wait for remote end to request data action on A channel.

 	     */

 	    while ( link_state == 0 ) {

 		status = get ( chan, (char *) &msg, sizeof(msg), &length );

 		if ( (status&1) == 0 ) {

 		    printf("Error in main loop get: %d\n", status );

 		    link_state = 3;

 		    break;

 		}

 	   	if ( length < RPC_HDR_SIZE ) {

 		    printf("Error in main loop get size: %d\n", length );

 		    break;

 		    link_state = 3;

 		}

 	   	if ( msg.channel != 'A' ) {

 		    printf("Error in main loop, unexpected channel: %c\n", 

 			msg.channel );

 		    break;

 		    link_state = 3;

 		}

 		if ( msg.function == 'G' ) {

 		    link_state = 1;

 		} else if ( msg.function == 'P' ) {

 		    link_state = 2;	/* write pending */

 		} else if ( msg.function == 'X' ) {

 		    link_state = 3;

 		} else {

 		    link_state = 3;

 		}

 	    }

 	    if ( link_state == 1 ) {

 		i = BIO_read ( s_bio, msg.data, msg.length );

 		if ( i < 0 ) link_state = 3;

 		else {

 		    msg.channel = 'A';

 		    msg.function = 'C';		/* confirm */

 		    msg.length = i;

 		    status = put ( chan, (char *) &msg, i+RPC_HDR_SIZE );

 		    if ( (status&1) == 0 ) break;

 		    link_state = 0;

 		}

 	    } else if ( link_state == 2 ) {

 		i = BIO_write ( s_bio, msg.data, msg.length );

 		if ( i < 0 ) link_state = 3;

 		else {

 		    msg.channel = 'A';

 		    msg.function = 'C';		/* confirm */

 		    msg.length = 0;

 		    status = put ( chan, (char *) &msg, RPC_HDR_SIZE );

 		    if ( (status&1) == 0 ) break;

 		    link_state = 0;

 		}

 	    }

 	}

 	fprintf(stdout,"DONE\n");

 err:

 	/* We have to set the BIO's to NULL otherwise they will be

 	 * free()ed twice.  Once when th s_ssl is SSL_free()ed and

 	 * again when c_ssl is SSL_free()ed.

 	 * This is a hack required because s_ssl and c_ssl are sharing the same

 	 * BIO structure and SSL_set_bio() and SSL_free() automatically

 	 * BIO_free non NULL entries.

 	 * You should not normally do this or be required to do this */

 	s_ssl->rbio=NULL;

 	s_ssl->wbio=NULL;

 	if (c_to_s != NULL) BIO_free(c_to_s);

 	if (s_to_c != NULL) BIO_free(s_to_c);

 	if (c_bio != NULL) BIO_free(c_bio);

 	if (s_bio != NULL) BIO_free(s_bio);

 	return(0);

 }