spp_clnt.c 19.9 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/evp.h>

//#define DEBUG

static const SSL_METHOD *spp_get_client_method(int ver);
static const SSL_METHOD *spp_get_client_method(int ver)
	{
	if (ver == SPP_VERSION)
		return SPP_client_method();
	return NULL;
	}

IMPLEMENT_spp_meth_func(SPP_VERSION, SPP_client_method,
			ssl_undefined_function,
			spp_connect,
			spp_get_client_method)

int spp_connect(SSL *s) {
    BUF_MEM *buf=NULL;
    SPP_PROXY* proxy=NULL;
    unsigned long Time=(unsigned long)time(NULL);
    void (*cb)(const SSL *ssl,int type,int val)=NULL;
    int ret= -1,i;
    int new_state,state,skip=0;
    /* Matteo -- START */
       struct timeval currTime;      // keep current time  
       struct timeval prevTime;      // keep previous time (to compute time passed)
       struct timeval originTime;    // keep previous time (to compute time passed)
	/* Matteo -- END*/


    RAND_add(&Time,sizeof(Time),0);
    ERR_clear_error();
    clear_sys_error();

    if (s->info_callback != NULL)
        cb=s->info_callback;
    else if (s->ctx->info_callback != NULL)
        cb=s->ctx->info_callback;

    s->in_handshake++;
    if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 

#ifndef OPENSSL_NO_HEARTBEATS
	/* If we're awaiting a HeartbeatResponse, pretend we
	 * already got and don't await it anymore, because
	 * Heartbeats don't make sense during handshakes anyway.
	 */
	if (s->tlsext_hb_pending) {
            s->tlsext_hb_pending = 0;
            s->tlsext_hb_seq++;
        }
#endif

    for (;;) {
        state=s->state;

        switch(s->state) {
            case SSL_ST_RENEGOTIATE:
                SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
                ret = -1;
                goto end;
                
            case SSL_ST_BEFORE:
            case SSL_ST_CONNECT:
            case SSL_ST_BEFORE|SSL_ST_CONNECT:
            case SSL_ST_OK|SSL_ST_CONNECT:
				// Initialize timers
				gettimeofday(&currTime, NULL);
				gettimeofday(&prevTime, NULL);
				gettimeofday(&originTime, NULL);

				// Log
				#ifdef DEBUG				
				log_time("Connecting\n", &currTime, &prevTime, &originTime); 
				#endif
                s->server=0; /* We are the client */
                s->proxy=0;
                s->proxy_id=1;
                
                if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

                if ((s->version & 0xff00 ) != 0x0600) { /* SPP major version is 6 */
                    SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
                    ret = -1;
                    goto end;
                }
				
                s->version=SPP_VERSION;
                s->type=SSL_ST_CONNECT;

                if (s->init_buf == NULL) {
                    if ((buf=BUF_MEM_new()) == NULL) {
                        ret= -1;
                        goto end;
                    }
                    if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) {
                        ret= -1;
                        goto end;
                    }
                    s->init_buf=buf;
                    buf=NULL;
                }

                if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }

                /* setup buffing BIO */
                if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
                
                if (!spp_generate_slice_keys(s)) { ret = -1; goto end; }

                /* don't push the buffering BIO quite yet */

                ssl3_init_finished_mac(s);

                s->state=SSL3_ST_CW_CLNT_HELLO_A;
                s->ctx->stats.sess_connect++;
                s->init_num=0;

                break;

            case SSL3_ST_CW_CLNT_HELLO_A:
            case SSL3_ST_CW_CLNT_HELLO_B:
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Sending client hello\n", &currTime, &prevTime, &originTime); 
				#endif
                s->shutdown=0;
                ret=ssl3_client_hello(s);
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CR_SRVR_HELLO_A;
                s->init_num=0;

                /* turn on buffering for the next lot of output */
                if (s->bbio != s->wbio)
                    s->wbio=BIO_push(s->bbio,s->wbio);

                break;                                

            case SSL3_ST_CR_SRVR_HELLO_A:
            case SSL3_ST_CR_SRVR_HELLO_B:
                ret=ssl3_get_server_hello(s);
				// Logging with time information 
				#ifdef DEBUG
				log_time("Received server hello\n", &currTime, &prevTime, &originTime); 			          
				#endif
		if (ret <= 0) goto end;

                s->state=SSL3_ST_CR_CERT_A;
                s->init_num=0;
                break;

            case SSL3_ST_CR_CERT_A:
            case SSL3_ST_CR_CERT_B:
                ret=ssl3_get_server_certificate(s);
				// Logging with time information 
				#ifdef DEBUG
				log_time("Received server certificate\n", &currTime, &prevTime, &originTime); 			            
				#endif
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CR_KEY_EXCH_A;
                s->init_num=0;
                break;

            case SSL3_ST_CR_KEY_EXCH_A:
            case SSL3_ST_CR_KEY_EXCH_B:                
                ret=ssl3_get_key_exchange(s);
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Received server key exchange\n", &currTime, &prevTime, &originTime); 				            
				#endif
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CR_CERT_REQ_A;
                s->init_num=0;

                /* at this point we check that we have the
                 * required stuff from the server */
                if (!ssl3_check_cert_and_algorithm(s)) {
                    ret= -1;
                    goto end;
                }
                break;     
                
            case SSL3_ST_CR_CERT_REQ_A:
            case SSL3_ST_CR_CERT_REQ_B:                
                ret=ssl3_get_certificate_request(s);
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Done certificate request\n", &currTime, &prevTime, &originTime); 				        
				#endif
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CR_SRVR_DONE_A;
                s->init_num=0;
                break;

            case SSL3_ST_CR_SRVR_DONE_A:
            case SSL3_ST_CR_SRVR_DONE_B:
                ret=ssl3_get_server_done(s);
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Received server done\n", &currTime, &prevTime, &originTime); 			
				#endif
                if (ret <= 0) goto end;
/*#ifndef OPENSSL_NO_SRP
                if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
                    if ((ret = SRP_Calc_A_param(s))<=0) {
                        SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
                        ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
                        goto end;
                    }
                }
#endif*/

                if (s->s3->tmp.cert_req)
                    s->state=SSL3_ST_CW_CERT_A;
                else {
                    proxy = spp_get_next_proxy(s, proxy, 0);
                    if (proxy == NULL) {
                        s->state=SSL3_ST_CW_KEY_EXCH_A;
                    } else {
                        s->state=SPP_ST_CR_PRXY_CERT_A;
                    }
                }
                s->init_num=0;

                break;

            case SSL3_ST_CW_CERT_A:
            case SSL3_ST_CW_CERT_B:
            case SSL3_ST_CW_CERT_C:
            case SSL3_ST_CW_CERT_D:
                                // Logging with time information 
                                #ifdef DEBUG
                                log_time("Sending client certificate\n", &currTime, &prevTime, &originTime);                 
                                #endif
                ret=ssl3_send_client_certificate(s);
                if (ret <= 0) goto end;

                proxy = spp_get_next_proxy(s, proxy, 0);
                if (proxy == NULL) {
                    s->state=SSL3_ST_CW_KEY_EXCH_A;
                } else {
                    s->state=SPP_ST_CR_PRXY_CERT_A;
                }

                s->init_num=0;
                break;

            case SPP_ST_CR_PRXY_CERT_A:
            case SPP_ST_CR_PRXY_CERT_B:
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Waiting for proxy certificate\n", &currTime, &prevTime, &originTime); 			
				#endif
                ret=spp_get_proxy_certificate(s, proxy);
                                gettimeofday(&currTime, NULL);	
				// Logging with time information 
				#ifdef DEBUG
				log_time("Received proxy certificate\n", &currTime, &prevTime, &originTime); 			
				#endif
                if (ret <= 0) goto end;
                s->state=SPP_ST_CR_PRXY_KEY_EXCH_A;
                s->init_num=0;
                break;
                
            /* Receive the hello messages from the proxies now. */
            case SPP_ST_CR_PRXY_KEY_EXCH_A:
            case SPP_ST_CR_PRXY_KEY_EXCH_B:
                ret=spp_get_proxy_key_exchange(s, proxy);
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Received proxy key exchange\n", &currTime, &prevTime, &originTime); 			 
				#endif
                if (ret <= 0) goto end;
                s->state=SPP_ST_CR_PRXY_DONE_A;
                s->init_num=0; 
                break;
                
            case SPP_ST_CR_PRXY_DONE_A:
            case SPP_ST_CR_PRXY_DONE_B:
                ret=spp_get_proxy_done(s, proxy);
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Received proxy done\n", &currTime, &prevTime, &originTime); 			 
				#endif
                if (ret <= 0) goto end;
                                
                proxy = spp_get_next_proxy(s, proxy, 0);
                if (proxy == NULL) {
                    s->state=SSL3_ST_CW_KEY_EXCH_A;
                } else {
                    /* Go back and read the next proxy */
                    s->state=SPP_ST_CR_PRXY_CERT_A;
                }
                s->init_num=0;                
                break;
                
            case SSL3_ST_CW_KEY_EXCH_A:
            case SSL3_ST_CW_KEY_EXCH_B:
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Sending client key exchange\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_send_client_key_exchange(s);
                if (ret <= 0) goto end;
                
                s->state=SPP_ST_CW_PRXY_MAT_A;
                //s->s3->change_cipher_spec=0;
                s->init_num=0;
                break;

            /* Send the proxy key material. */
            case SPP_ST_CW_PRXY_MAT_A:
            case SPP_ST_CW_PRXY_MAT_B:
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Sending proxy key material\n", &currTime, &prevTime, &originTime); 				
				#endif
                for (i = 0; i < s->proxies_len; i++) {
                    ret=spp_send_proxy_key_material(s, s->proxies[i]);
                    if (ret <= 0) goto end;
                    s->state = SPP_ST_CW_PRXY_MAT_A;
                    s->init_num=0;
                }
                ret=spp_send_end_key_material_client(s);
                
                //s->s3->tmp.next_state=SPP_ST_CR_PRXY_MAT_A;
                //s->state=SSL3_ST_CW_FLUSH;
                s->state=SSL3_ST_CW_CHANGE_A;
                //s->s3->change_cipher_spec=0;

                s->init_num=0;
                break;
                
            case SPP_ST_CR_PRXY_MAT_A:
            case SPP_ST_CR_PRXY_MAT_B:
                                // Logging with time information 
				#ifdef DEBUG
				log_time("Receiving proxy key material\n", &currTime, &prevTime, &originTime); 								
				#endif
                for (i = s->proxies_len-1; i >= 0; i--) {
                    ret=spp_get_proxy_key_material(s, s->proxies[i]);
                    if (ret <= 0) goto end;
                    s->state = SPP_ST_CR_PRXY_MAT_A;
                    s->init_num=0;
                }
                ret=spp_get_end_key_material_client(s);
                // Logging with time information 
				#ifdef DEBUG
				log_time("Received proxy key material\n", &currTime, &prevTime, &originTime); 				
				#endif
                if (ret <= 0) goto end;
#ifndef OPENSSL_NO_TLSEXT
                /* Allow NewSessionTicket if ticket expected */
                if (s->tlsext_ticket_expected)
                    s->state=SSL3_ST_CR_SESSION_TICKET_A;
                else
#endif
                    s->state=SSL3_ST_CR_FINISHED_A;
                s->s3->change_cipher_spec=0;

                s->init_num=0;
                break;

            case SSL3_ST_CW_CHANGE_A:
            case SSL3_ST_CW_CHANGE_B:
                // Logging with time information 
				#ifdef DEBUG
				log_time("Sending change cipher state\n", &currTime, &prevTime, &originTime); 		
				#endif
                ret=ssl3_send_change_cipher_spec(s,SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
                if (ret <= 0) goto end;

#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
                s->state=SSL3_ST_CW_FINISHED_A;
#else
                if (s->s3->next_proto_neg_seen)
                    s->state=SSL3_ST_CW_NEXT_PROTO_A;
                else
                    s->state=SSL3_ST_CW_FINISHED_A;
#endif
                s->init_num=0;

                s->session->cipher=s->s3->tmp.new_cipher;
#ifdef OPENSSL_NO_COMP
                s->session->compress_meth=0;
#else
                if (s->s3->tmp.new_compression == NULL)
                    s->session->compress_meth=0;
                else
                    s->session->compress_meth= s->s3->tmp.new_compression->id;
#endif
                if (!s->method->ssl3_enc->setup_key_block(s)) {
                    ret= -1;
                    goto end;
                }

                if (!s->method->ssl3_enc->change_cipher_state(s,SSL3_CHANGE_CIPHER_CLIENT_WRITE)) {
                    ret= -1;
                    goto end;
                }
                /* Set up all */

                break;

#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
            case SSL3_ST_CW_NEXT_PROTO_A:
            case SSL3_ST_CW_NEXT_PROTO_B:
                ret=ssl3_send_next_proto(s);
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CW_FINISHED_A;
                break;
#endif

            case SSL3_ST_CW_FINISHED_A:
            case SSL3_ST_CW_FINISHED_B:
                // Logging with time information 
				#ifdef DEBUG
				log_time("Sending client finished\n", &currTime, &prevTime, &originTime); 		
				#endif
                ret=ssl3_send_finished(s,
                    SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
                    s->method->ssl3_enc->client_finished_label,
                    s->method->ssl3_enc->client_finished_label_len);
                if (ret <= 0) goto end;
                s->s3->flags |= SSL3_FLAGS_CCS_OK;
                s->state=SSL3_ST_CW_FLUSH;

                /* clear flags */
                s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
                if (s->hit) {
                    s->s3->tmp.next_state=SSL_ST_OK;
                    if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
                        s->state=SSL_ST_OK;
                        s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
                        s->s3->delay_buf_pop_ret=0;
                    }
                } else {
                    s->s3->tmp.next_state=SPP_ST_CR_PRXY_MAT_A;
                }
                                
                // Store the values for end-to-end integrity checking
                if (spp_init_integrity_st(s) <= 0)
                    goto end;
                s->init_num=0;
                break;

#ifndef OPENSSL_NO_TLSEXT
            case SSL3_ST_CR_SESSION_TICKET_A:
            case SSL3_ST_CR_SESSION_TICKET_B:
                                #ifdef DEBUG
				log_time("Receiving session ticket\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_get_new_session_ticket(s);
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CR_FINISHED_A;
                s->init_num=0;
                break;

            case SSL3_ST_CR_CERT_STATUS_A:
            case SSL3_ST_CR_CERT_STATUS_B:
                                #ifdef DEBUG
				log_time("Receiving cert status\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_get_cert_status(s);
                if (ret <= 0) goto end;
                s->state=SSL3_ST_CR_KEY_EXCH_A;
                s->init_num=0;
		break;
#endif

            case SSL3_ST_CR_FINISHED_A:
            case SSL3_ST_CR_FINISHED_B:
                // Logging with time information 
				#ifdef DEBUG
				log_time("Receiving server finished\n", &currTime, &prevTime, &originTime); 		
				#endif
                s->s3->flags |= SSL3_FLAGS_CCS_OK;
                ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
                    SSL3_ST_CR_FINISHED_B);
                if (ret <= 0) goto end;

                if (s->hit)
                    s->state=SSL3_ST_CW_CHANGE_A;
                else
                    s->state=SSL_ST_OK;
                s->init_num=0;
                
                /* Setup the slices now that we have the necessary state. */
                ret = spp_init_slices_st(s, SSL3_CHANGE_CIPHER_CLIENT_WRITE);
                if (ret <= 0) goto end;
                ret = spp_init_slices_st(s, SSL3_CHANGE_CIPHER_CLIENT_READ);
                if (ret <= 0) goto end;
                
                break;

            case SSL3_ST_CW_FLUSH:
                s->rwstate=SSL_WRITING;
                if (BIO_flush(s->wbio) <= 0) {
                    ret= -1;
                    goto end;
                }
                s->rwstate=SSL_NOTHING;
                s->state=s->s3->tmp.next_state;
                break;

            case SSL_ST_OK:
                                #ifdef DEBUG
				log_time("Handshake OK\n", &currTime, &prevTime, &originTime); 
				#endif
                /* clean a few things up */
                ssl3_cleanup_key_block(s);

                if (s->init_buf != NULL) {
                    BUF_MEM_free(s->init_buf);
                    s->init_buf=NULL;
                }

                /* If we are not 'joining' the last two packets,
                 * remove the buffering now */
                if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
                    ssl_free_wbio_buffer(s);
                /* else do it later in ssl3_write */

                s->init_num=0;
                s->renegotiate=0;
                s->new_session=0;

                ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
                if (s->hit) s->ctx->stats.sess_hit++;

                ret=1;
                /* s->server=0; */
                s->handshake_func=spp_connect;
                s->ctx->stats.sess_connect_good++;

                if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);

                goto end;
                /* break; */
			
            default:
                SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
                ret= -1;
                goto end;
                /* break; */
        }

        /* did we do anything */
        if (!s->s3->tmp.reuse_message && !skip) {
            if (s->debug) {
                if ((ret=BIO_flush(s->wbio)) <= 0)
                    goto end;
            }

            if ((cb != NULL) && (s->state != state)) {
                new_state=s->state;
                s->state=state;
                cb(s,SSL_CB_CONNECT_LOOP,1);
                s->state=new_state;
            }
        }
        skip=0;
    }
end:
    // Logging with time information 
	#ifdef DEBUG
	log_time("Handshake end\n", &currTime, &prevTime, &originTime); 
	#endif
    s->in_handshake--;
    if (buf != NULL)
        BUF_MEM_free(buf);
    if (cb != NULL)
        cb(s,SSL_CB_CONNECT_EXIT,ret);
    return(ret);
}