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  */
get(io_channel chan,char * buffer,int maxlen,int * length)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 
put(io_channel chan,char * buffer,int length)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  */
general_request(io_channel chan,struct rpc_msg * msg,int length)201 static int general_request(io_channel chan, struct rpc_msg *msg, int length)
202 {
203     return 48;
204 }
205 
206 /***************************************************************************/
main(int argc,char ** argv)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 
doit(io_channel chan,SSL_CTX * s_ctx)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 }
398