ssl/ssl_task.c

   1 /* ssl/ssl_task.c */
   2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 /* VMS */
  60 /*
  61  * DECnet object for servicing SSL.  We accept the inbound and speak a
  62  * simple protocol for multiplexing the 2 data streams (application and
  63  * ssl data) over this logical link.
  64  *
  65  * Logical names:
  66  *    SSL_CIPHER        Defines a list of cipher specifications the server
  67  *                      will support in order of preference.
  68  *    SSL_SERVER_CERTIFICATE
  69  *                      Points to PEM (privacy enhanced mail) file that
  70  *                      contains the server certificate and private password.
  71  *    SYS$NET           Logical created by netserver.exe as hook for completing
  72  *                      DECnet logical link.
  73  *
  74  * Each NSP message sent over the DECnet link has the following structure:
  75  *    struct rpc_msg {
  76  *      char channel;
  77  *      char function;
  78  *      short length;
  79  *      char data[MAX_DATA];
  80  *    } msg;
  81  *
  82  * The channel field designates the virtual data stream this message applies
  83  * to and is one of:
  84  *   A - Application data (payload).
  85  *   R - Remote client connection that initiated the SSL connection.  Encrypted
  86  *       data is sent over this connection.
  87  *   G - General data, reserved for future use.
  88  *
  89  * The data streams are half-duplex read/write and have following functions:
  90  *   G - Get, requests that up to msg.length bytes of data be returned.  The
  91  *       data is returned in the next 'C' function response that matches the
  92  *       requesting channel.
  93  *   P - Put, requests that the first msg.length bytes of msg.data be appended
  94  *       to the designated stream.
  95  *   C - Confirms a get or put.  Every get and put will get a confirm response,
  96  *       you cannot initiate another function on a channel until the previous
  97  *       operation has been confirmed.
  98  *
  99  *  The 2 channels may interleave their operations, for example:
 100  *        Server msg           Client msg
 101  *         A, Get, 4092          ---->
 102  *                               <----  R, get, 4092
 103  *         R, Confirm, {hello}   ---->
 104  *                               <----  R, put, {srv hello}
 105  *         R, Confirm, 0         ---->
 106  *                               .              (SSL handshake completed)
 107  *                               .              (read first app data).
 108  *                               <----  A, confirm, {http data}
 109  *         A, Put, {http data}   ---->
 110  *                               <----  A, confirm, 0
 111  *
 112  *  The length field is not permitted to be larger that 4092 bytes.
 113  *
 114  * Author: Dave Jones
 115  * Date:   22-JUL-1996
 116  */
 117 #include <stdlib.h>
 118 #include <stdio.h>
 119 #include <iodef.h>              /* VMS IO$_ definitions */
 120 #include <descrip.h>            /* VMS string descriptors */
 121 extern int SYS$QIOW(), SYS$ASSIGN();
 122 int LIB$INIT_TIMER(), LIB$SHOW_TIMER();
 123
 124 #include <string.h>             /* from ssltest.c */
 125 #include <errno.h>
 126 #include "buffer.h"
 127 #include "../e_os.h"
 128 #include "x509.h"
 129 #include "ssl.h"
 130 #include "err.h"
 131
 132 int MS_CALLBACK verify_callback(int ok, X509 *xs, X509 *xi, int depth,
 133         int error);
 134 BIO *bio_err=NULL;
 135 BIO *bio_stdout=NULL;
 136 BIO_METHOD *BIO_s_rtcp();
 137
 138 static char *cipher=NULL;
 139 int verbose=1;
 140 #ifdef FIONBIO
 141 static int s_nbio=0;
 142 #endif
 143 #define TEST_SERVER_CERT "SSL_SERVER_CERTIFICATE"
 144 /*************************************************************************/
 145 struct rpc_msg {                /* Should have member alignment inhibited */
 146    char channel;                /* 'A'-app data. 'R'-remote client 'G'-global */
 147    char function;               /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
 148    unsigned short int length;   /* Amount of data returned or max to return */
 149    char data[4092];             /* variable data */
 150 };
 151 #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
 152
 153 static $DESCRIPTOR(sysnet, "SYS$NET");
 154 typedef unsigned short io_channel;
 155
 156 struct io_status {
 157     unsigned short status;
 158     unsigned short count;
 159     unsigned long stsval;
 160 };
 161 int doit(io_channel chan, SSL_CTX *s_ctx );
 162 /*****************************************************************************/
 163 /* Decnet I/O routines.
 164  */
 165 static int get ( io_channel chan, char *buffer, int maxlen, int *length )
 166 {
 167     int status;
 168     struct io_status iosb;
 169     status = SYS$QIOW ( 0, chan, IO$_READVBLK, &iosb, 0, 0,
 170         buffer, maxlen, 0, 0, 0, 0 );
 171     if ( (status&1) == 1 ) status = iosb.status;
 172     if ( (status&1) == 1 ) *length = iosb.count;
 173     return status;
 174 }
 175
 176 static int put ( io_channel chan, char *buffer, int length )
 177 {
 178     int status;
 179     struct io_status iosb;
 180     status = SYS$QIOW ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
 181         buffer, length, 0, 0, 0, 0 );
 182     if ( (status&1) == 1 ) status = iosb.status;
 183     return status;
 184 }
 185 /***************************************************************************/
 186 /* Handle operations on the 'G' channel.
 187  */
 188 static int general_request ( io_channel chan, struct rpc_msg *msg, int length )
 189 {
 190     return 48;
 191 }
 192 /***************************************************************************/
 193 int main ( int argc, char **argv )
 194 {
 195     int status, length;
 196     io_channel chan;
 197     struct rpc_msg msg;
 198
 199         char *CApath=NULL,*CAfile=NULL;
 200         int badop=0;
 201         int ret=1;
 202         int client_auth=0;
 203         int server_auth=0;
 204         SSL_CTX *s_ctx=NULL;
 205     /*
 206      * Confirm logical link with initiating client.
 207      */
 208     LIB$INIT_TIMER();
 209     status = SYS$ASSIGN ( &sysnet, &chan, 0, 0, 0 );
 210     printf("status of assign to SYS$NET: %d\n", status );
 211     /*
 212      * Initialize standard out and error files.
 213      */
 214         if (bio_err == NULL)
 215                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 216                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE);
 217         if (bio_stdout == NULL)
 218                 if ((bio_stdout=BIO_new(BIO_s_file())) != NULL)
 219                         BIO_set_fp(bio_stdout,stdout,BIO_NOCLOSE);
 220     /*
 221      * get the preferred cipher list and other initialization
 222      */
 223         if (cipher == NULL) cipher=getenv("SSL_CIPHER");
 224         printf("cipher list: %s\n", cipher ? cipher : "{undefined}" );
 225
 226         SSL_load_error_strings();
 227
 228         s_ctx=SSL_CTX_new(SSLv2());
 229
 230         if (s_ctx == NULL) goto end;
 231
 232         SSL_CTX_use_certificate_file(s_ctx,TEST_SERVER_CERT,SSL_FILETYPE_PEM);
 233         SSL_CTX_use_RSAPrivateKey_file(s_ctx,TEST_SERVER_CERT,SSL_FILETYPE_PEM);
 234         printf("Loaded server certificate: '%s'\n", TEST_SERVER_CERT );
 235
 236     /*
 237      * Take commands from client until bad status.
 238      */
 239     LIB$SHOW_TIMER();
 240     status = doit ( chan, s_ctx );
 241     LIB$SHOW_TIMER();
 242     /*
 243      * do final cleanup and exit.
 244      */
 245 end:
 246         if (s_ctx != NULL) SSL_CTX_free(s_ctx);
 247     LIB$SHOW_TIMER();
 248     return 1;
 249 }
 250
 251 int doit(io_channel chan, SSL_CTX *s_ctx )
 252 {
 253     int status, length, link_state;
 254      struct rpc_msg msg;
 255         static char cbuf[200],sbuf[200];
 256         SSL *s_ssl=NULL;
 257         BIO *c_to_s=NULL;
 258         BIO *s_to_c=NULL;
 259         BIO *c_bio=NULL;
 260         BIO *s_bio=NULL;
 261         int i;
 262         int done=0;
 263
 264         s_ssl=SSL_new(s_ctx);
 265         if (s_ssl == NULL) goto err;
 266
 267         c_to_s=BIO_new(BIO_s_rtcp());
 268         s_to_c=BIO_new(BIO_s_rtcp());
 269         if ((s_to_c == NULL) || (c_to_s == NULL)) goto err;
 270         BIO_set_fd ( c_to_s, "", chan );
 271         BIO_set_fd ( s_to_c, "", chan );
 272
 273         c_bio=BIO_new(BIO_f_ssl());
 274         s_bio=BIO_new(BIO_f_ssl());
 275         if ((c_bio == NULL) || (s_bio == NULL)) goto err;
 276
 277         SSL_set_accept_state(s_ssl);
 278         SSL_set_bio(s_ssl,c_to_s,s_to_c);
 279         BIO_set_ssl(s_bio,s_ssl,BIO_CLOSE);
 280
 281         /* We can always do writes */
 282         printf("Begin doit main loop\n");
 283         /*
 284          * Link states: 0-idle, 1-read pending, 2-write pending, 3-closed.
 285          */
 286         for (link_state = 0; link_state < 3; ) {
 287             /*
 288              * Wait for remote end to request data action on A channel.
 289              */
 290             while ( link_state == 0 ) {
 291                 status = get ( chan, (char *) &msg, sizeof(msg), &length );
 292                 if ( (status&1) == 0 ) {
 293                     printf("Error in main loop get: %d\n", status );
 294                     link_state = 3;
 295                     break;
 296                 }
 297                 if ( length < RPC_HDR_SIZE ) {
 298                     printf("Error in main loop get size: %d\n", length );
 299                     break;
 300                     link_state = 3;
 301                 }
 302                 if ( msg.channel != 'A' ) {
 303                     printf("Error in main loop, unexpected channel: %c\n",
 304                         msg.channel );
 305                     break;
 306                     link_state = 3;
 307                 }
 308                 if ( msg.function == 'G' ) {
 309                     link_state = 1;
 310                 } else if ( msg.function == 'P' ) {
 311                     link_state = 2;     /* write pending */
 312                 } else if ( msg.function == 'X' ) {
 313                     link_state = 3;
 314                 } else {
 315                     link_state = 3;
 316                 }
 317             }
 318             if ( link_state == 1 ) {
 319                 i = BIO_read ( s_bio, msg.data, msg.length );
 320                 if ( i < 0 ) link_state = 3;
 321                 else {
 322                     msg.channel = 'A';
 323                     msg.function = 'C';         /* confirm */
 324                     msg.length = i;
 325                     status = put ( chan, (char *) &msg, i+RPC_HDR_SIZE );
 326                     if ( (status&1) == 0 ) break;
 327                     link_state = 0;
 328                 }
 329             } else if ( link_state == 2 ) {
 330                 i = BIO_write ( s_bio, msg.data, msg.length );
 331                 if ( i < 0 ) link_state = 3;
 332                 else {
 333                     msg.channel = 'A';
 334                     msg.function = 'C';         /* confirm */
 335                     msg.length = 0;
 336                     status = put ( chan, (char *) &msg, RPC_HDR_SIZE );
 337                     if ( (status&1) == 0 ) break;
 338                     link_state = 0;
 339                 }
 340             }
 341         }
 342         fprintf(stdout,"DONE\n");
 343 err:
 344         /* We have to set the BIO's to NULL otherwise they will be
 345          * free()ed twice.  Once when th s_ssl is SSL_free()ed and
 346          * again when c_ssl is SSL_free()ed.
 347          * This is a hack required because s_ssl and c_ssl are sharing the same
 348          * BIO structure and SSL_set_bio() and SSL_free() automatically
 349          * BIO_free non NULL entries.
 350          * You should not normally do this or be required to do this */
 351         s_ssl->rbio=NULL;
 352         s_ssl->wbio=NULL;
 353
 354         if (c_to_s != NULL) BIO_free(c_to_s);
 355         if (s_to_c != NULL) BIO_free(s_to_c);
 356         if (c_bio != NULL) BIO_free(c_bio);
 357         if (s_bio != NULL) BIO_free(s_bio);
 358         return(0);
 359 }