ssl/ssl_task.c

   1 /* ssl/ssl_task.c */
   2 /* Copyright (C) 1995-1998 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
 127 #include "e_os.h"
 128
 129 #include <openssl/buffer.h>
 130 #include <openssl/x509.h>
 131 #include <openssl/ssl.h>
 132 #include <openssl/err.h>
 133
 134 int MS_CALLBACK verify_callback(int ok, X509 *xs, X509 *xi, int depth,
 135                                 int error);
 136 BIO *bio_err = NULL;
 137 BIO *bio_stdout = NULL;
 138 BIO_METHOD *BIO_s_rtcp();
 139
 140 static char *cipher = NULL;
 141 int verbose = 1;
 142 #ifdef FIONBIO
 143 static int s_nbio = 0;
 144 #endif
 145 #define TEST_SERVER_CERT "SSL_SERVER_CERTIFICATE"
 146 /*************************************************************************/
 147 /* Should have member alignment inhibited */
 148 struct rpc_msg {
 149     /* 'A'-app data. 'R'-remote client 'G'-global */
 150     char channel;
 151     /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
 152     char function;
 153     /* Amount of data returned or max to return */
 154     unsigned short int length;
 155     /* variable data */
 156     char data[4092];
 157 };
 158 #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
 159
 160 static $DESCRIPTOR(sysnet, "SYS$NET");
 161 typedef unsigned short io_channel;
 162
 163 struct io_status {
 164     unsigned short status;
 165     unsigned short count;
 166     unsigned long stsval;
 167 };
 168 int doit(io_channel chan, SSL_CTX *s_ctx);
 169 /*****************************************************************************/
 170 /*
 171  * Decnet I/O routines.
 172  */
 173 static int get(io_channel chan, char *buffer, int maxlen, int *length)
 174 {
 175     int status;
 176     struct io_status iosb;
 177     status = SYS$QIOW(0, chan, IO$_READVBLK, &iosb, 0, 0,
 178                       buffer, maxlen, 0, 0, 0, 0);
 179     if ((status & 1) == 1)
 180         status = iosb.status;
 181     if ((status & 1) == 1)
 182         *length = iosb.count;
 183     return status;
 184 }
 185
 186 static int put(io_channel chan, char *buffer, int length)
 187 {
 188     int status;
 189     struct io_status iosb;
 190     status = SYS$QIOW(0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
 191                       buffer, length, 0, 0, 0, 0);
 192     if ((status & 1) == 1)
 193         status = iosb.status;
 194     return status;
 195 }
 196
 197 /***************************************************************************/
 198 /*
 199  * Handle operations on the 'G' channel.
 200  */
 201 static int general_request(io_channel chan, struct rpc_msg *msg, int length)
 202 {
 203     return 48;
 204 }
 205
 206 /***************************************************************************/
 207 int main(int argc, char **argv)
 208 {
 209     int status, length;
 210     io_channel chan;
 211     struct rpc_msg msg;
 212
 213     char *CApath = NULL, *CAfile = NULL;
 214     int badop = 0;
 215     int ret = 1;
 216     int client_auth = 0;
 217     int server_auth = 0;
 218     SSL_CTX *s_ctx = NULL;
 219     /*
 220      * Confirm logical link with initiating client.
 221      */
 222     LIB$INIT_TIMER();
 223     status = SYS$ASSIGN(&sysnet, &chan, 0, 0, 0);
 224     printf("status of assign to SYS$NET: %d\n", status);
 225     /*
 226      * Initialize standard out and error files.
 227      */
 228     if (bio_err == NULL)
 229         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 230             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE);
 231     if (bio_stdout == NULL)
 232         if ((bio_stdout = BIO_new(BIO_s_file())) != NULL)
 233             BIO_set_fp(bio_stdout, stdout, BIO_NOCLOSE);
 234     /*
 235      * get the preferred cipher list and other initialization
 236      */
 237     if (cipher == NULL)
 238         cipher = getenv("SSL_CIPHER");
 239     printf("cipher list: %s\n", cipher ? cipher : "{undefined}");
 240
 241     SSL_load_error_strings();
 242     OpenSSL_add_all_algorithms();
 243
 244     /*
 245      * DRM, this was the original, but there is no such thing as SSLv2()
 246      * s_ctx=SSL_CTX_new(SSLv2());
 247      */
 248     s_ctx = SSL_CTX_new(SSLv2_server_method());
 249
 250     if (s_ctx == NULL)
 251         goto end;
 252
 253     SSL_CTX_use_certificate_file(s_ctx, TEST_SERVER_CERT, SSL_FILETYPE_PEM);
 254     SSL_CTX_use_RSAPrivateKey_file(s_ctx, TEST_SERVER_CERT, SSL_FILETYPE_PEM);
 255     printf("Loaded server certificate: '%s'\n", TEST_SERVER_CERT);
 256
 257     /*
 258      * Take commands from client until bad status.
 259      */
 260     LIB$SHOW_TIMER();
 261     status = doit(chan, s_ctx);
 262     LIB$SHOW_TIMER();
 263     /*
 264      * do final cleanup and exit.
 265      */
 266  end:
 267     if (s_ctx != NULL)
 268         SSL_CTX_free(s_ctx);
 269     LIB$SHOW_TIMER();
 270     return 1;
 271 }
 272
 273 int doit(io_channel chan, SSL_CTX *s_ctx)
 274 {
 275     int status, length, link_state;
 276     struct rpc_msg msg;
 277
 278     SSL *s_ssl = NULL;
 279     BIO *c_to_s = NULL;
 280     BIO *s_to_c = NULL;
 281     BIO *c_bio = NULL;
 282     BIO *s_bio = NULL;
 283     int i;
 284     int done = 0;
 285
 286     s_ssl = SSL_new(s_ctx);
 287     if (s_ssl == NULL)
 288         goto err;
 289
 290     c_to_s = BIO_new(BIO_s_rtcp());
 291     s_to_c = BIO_new(BIO_s_rtcp());
 292     if ((s_to_c == NULL) || (c_to_s == NULL))
 293         goto err;
 294 /*- original, DRM 24-SEP-1997
 295         BIO_set_fd ( c_to_s, "", chan );
 296         BIO_set_fd ( s_to_c, "", chan );
 297 */
 298     BIO_set_fd(c_to_s, 0, chan);
 299     BIO_set_fd(s_to_c, 0, chan);
 300
 301     c_bio = BIO_new(BIO_f_ssl());
 302     s_bio = BIO_new(BIO_f_ssl());
 303     if ((c_bio == NULL) || (s_bio == NULL))
 304         goto err;
 305
 306     SSL_set_accept_state(s_ssl);
 307     SSL_set_bio(s_ssl, c_to_s, s_to_c);
 308     BIO_set_ssl(s_bio, s_ssl, BIO_CLOSE);
 309
 310     /* We can always do writes */
 311     printf("Begin doit main loop\n");
 312     /*
 313      * Link states: 0-idle, 1-read pending, 2-write pending, 3-closed.
 314      */
 315     for (link_state = 0; link_state < 3;) {
 316         /*
 317          * Wait for remote end to request data action on A channel.
 318          */
 319         while (link_state == 0) {
 320             status = get(chan, (char *)&msg, sizeof(msg), &length);
 321             if ((status & 1) == 0) {
 322                 printf("Error in main loop get: %d\n", status);
 323                 link_state = 3;
 324                 break;
 325             }
 326             if (length < RPC_HDR_SIZE) {
 327                 printf("Error in main loop get size: %d\n", length);
 328                 break;
 329                 link_state = 3;
 330             }
 331             if (msg.channel != 'A') {
 332                 printf("Error in main loop, unexpected channel: %c\n",
 333                        msg.channel);
 334                 break;
 335                 link_state = 3;
 336             }
 337             if (msg.function == 'G') {
 338                 link_state = 1;
 339             } else if (msg.function == 'P') {
 340                 link_state = 2; /* write pending */
 341             } else if (msg.function == 'X') {
 342                 link_state = 3;
 343             } else {
 344                 link_state = 3;
 345             }
 346         }
 347         if (link_state == 1) {
 348             i = BIO_read(s_bio, msg.data, msg.length);
 349             if (i < 0)
 350                 link_state = 3;
 351             else {
 352                 msg.channel = 'A';
 353                 msg.function = 'C'; /* confirm */
 354                 msg.length = i;
 355                 status = put(chan, (char *)&msg, i + RPC_HDR_SIZE);
 356                 if ((status & 1) == 0)
 357                     break;
 358                 link_state = 0;
 359             }
 360         } else if (link_state == 2) {
 361             i = BIO_write(s_bio, msg.data, msg.length);
 362             if (i < 0)
 363                 link_state = 3;
 364             else {
 365                 msg.channel = 'A';
 366                 msg.function = 'C'; /* confirm */
 367                 msg.length = 0;
 368                 status = put(chan, (char *)&msg, RPC_HDR_SIZE);
 369                 if ((status & 1) == 0)
 370                     break;
 371                 link_state = 0;
 372             }
 373         }
 374     }
 375     fprintf(stdout, "DONE\n");
 376  err:
 377     /*
 378      * We have to set the BIO's to NULL otherwise they will be free()ed
 379      * twice.  Once when th s_ssl is SSL_free()ed and again when c_ssl is
 380      * SSL_free()ed. This is a hack required because s_ssl and c_ssl are
 381      * sharing the same BIO structure and SSL_set_bio() and SSL_free()
 382      * automatically BIO_free non NULL entries. You should not normally do
 383      * this or be required to do this
 384      */
 385     s_ssl->rbio = NULL;
 386     s_ssl->wbio = NULL;
 387
 388     if (c_to_s != NULL)
 389         BIO_free(c_to_s);
 390     if (s_to_c != NULL)
 391         BIO_free(s_to_c);
 392     if (c_bio != NULL)
 393         BIO_free(c_bio);
 394     if (s_bio != NULL)
 395         BIO_free(s_bio);
 396     return (0);
 397 }