handshake.c@ 108358

最後變更在這個檔案從108358是 108206,由 vboxsync 提交於 5 週前
openssl-3.3.2: Exported all files to OSE and removed .scm-settings bugref:10757
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1	/*
2	* Copyright 2016-2024 The OpenSSL Project Authors. All Rights Reserved.
3	*
4	* Licensed under the Apache License 2.0 (the "License"). You may not use
5	* this file except in compliance with the License. You can obtain a copy
6	* in the file LICENSE in the source distribution or at
7	* https://www.openssl.org/source/license.html
8	*/
9
10	#include <string.h>
11
12	#include <openssl/bio.h>
13	#include <openssl/x509_vfy.h>
14	#include <openssl/ssl.h>
15	#include <openssl/core_names.h>
16
17	#include "../../ssl/ssl_local.h"
18	#include "internal/sockets.h"
19	#include "internal/nelem.h"
20	#include "handshake.h"
21	#include "../testutil.h"
22
23	#if !defined(OPENSSL_NO_SCTP) && !defined(OPENSSL_NO_SOCK)
24	#include <netinet/sctp.h>
25	#endif
26
27	HANDSHAKE_RESULT *HANDSHAKE_RESULT_new(void)
28	{
29	HANDSHAKE_RESULT *ret;
30
31	TEST_ptr(ret = OPENSSL_zalloc(sizeof(*ret)));
32	return ret;
33	}
34
35	void HANDSHAKE_RESULT_free(HANDSHAKE_RESULT *result)
36	{
37	if (result == NULL)
38	return;
39	OPENSSL_free(result->client_npn_negotiated);
40	OPENSSL_free(result->server_npn_negotiated);
41	OPENSSL_free(result->client_alpn_negotiated);
42	OPENSSL_free(result->server_alpn_negotiated);
43	OPENSSL_free(result->result_session_ticket_app_data);
44	sk_X509_NAME_pop_free(result->server_ca_names, X509_NAME_free);
45	sk_X509_NAME_pop_free(result->client_ca_names, X509_NAME_free);
46	OPENSSL_free(result->cipher);
47	OPENSSL_free(result);
48	}
49
50	/*
51	* Since there appears to be no way to extract the sent/received alert
52	* from the SSL object directly, we use the info callback and stash
53	* the result in ex_data.
54	*/
55	typedef struct handshake_ex_data_st {
56	int alert_sent;
57	int num_fatal_alerts_sent;
58	int alert_received;
59	int session_ticket_do_not_call;
60	ssl_servername_t servername;
61	} HANDSHAKE_EX_DATA;
62
63	/* \|ctx_data\| itself is stack-allocated. */
64	static void ctx_data_free_data(CTX_DATA *ctx_data)
65	{
66	OPENSSL_free(ctx_data->npn_protocols);
67	ctx_data->npn_protocols = NULL;
68	OPENSSL_free(ctx_data->alpn_protocols);
69	ctx_data->alpn_protocols = NULL;
70	OPENSSL_free(ctx_data->srp_user);
71	ctx_data->srp_user = NULL;
72	OPENSSL_free(ctx_data->srp_password);
73	ctx_data->srp_password = NULL;
74	OPENSSL_free(ctx_data->session_ticket_app_data);
75	ctx_data->session_ticket_app_data = NULL;
76	}
77
78	static int ex_data_idx;
79
80	static void info_cb(const SSL *s, int where, int ret)
81	{
82	if (where & SSL_CB_ALERT) {
83	HANDSHAKE_EX_DATA *ex_data =
84	(HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
85	if (where & SSL_CB_WRITE) {
86	ex_data->alert_sent = ret;
87	if (strcmp(SSL_alert_type_string(ret), "F") == 0
88	\|\| strcmp(SSL_alert_desc_string(ret), "CN") == 0)
89	ex_data->num_fatal_alerts_sent++;
90	} else {
91	ex_data->alert_received = ret;
92	}
93	}
94	}
95
96	/* Select the appropriate server CTX.
97	* Returns SSL_TLSEXT_ERR_OK if a match was found.
98	* If \|ignore\| is 1, returns SSL_TLSEXT_ERR_NOACK on mismatch.
99	* Otherwise, returns SSL_TLSEXT_ERR_ALERT_FATAL on mismatch.
100	* An empty SNI extension also returns SSL_TSLEXT_ERR_NOACK.
101	*/
102	static int select_server_ctx(SSL s, void arg, int ignore)
103	{
104	const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
105	HANDSHAKE_EX_DATA *ex_data =
106	(HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
107
108	if (servername == NULL) {
109	ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
110	return SSL_TLSEXT_ERR_NOACK;
111	}
112
113	if (strcmp(servername, "server2") == 0) {
114	SSL_CTX new_ctx = (SSL_CTX)arg;
115	SSL_set_SSL_CTX(s, new_ctx);
116	/*
117	* Copy over all the SSL_CTX options - reasonable behavior
118	* allows testing of cases where the options between two
119	* contexts differ/conflict
120	*/
121	SSL_clear_options(s, 0xFFFFFFFFL);
122	SSL_set_options(s, SSL_CTX_get_options(new_ctx));
123
124	ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
125	return SSL_TLSEXT_ERR_OK;
126	} else if (strcmp(servername, "server1") == 0) {
127	ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
128	return SSL_TLSEXT_ERR_OK;
129	} else if (ignore) {
130	ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
131	return SSL_TLSEXT_ERR_NOACK;
132	} else {
133	/* Don't set an explicit alert, to test library defaults. */
134	return SSL_TLSEXT_ERR_ALERT_FATAL;
135	}
136	}
137
138	static int client_hello_select_server_ctx(SSL s, void arg, int ignore)
139	{
140	const char *servername;
141	const unsigned char *p;
142	size_t len, remaining;
143	HANDSHAKE_EX_DATA *ex_data =
144	(HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
145
146	/*
147	* The server_name extension was given too much extensibility when it
148	* was written, so parsing the normal case is a bit complex.
149	*/
150	if (!SSL_client_hello_get0_ext(s, TLSEXT_TYPE_server_name, &p,
151	&remaining) \|\|
152	remaining <= 2)
153	return 0;
154	/* Extract the length of the supplied list of names. */
155	len = (*(p++) << 8);
156	len += *(p++);
157	if (len + 2 != remaining)
158	return 0;
159	remaining = len;
160	/*
161	* The list in practice only has a single element, so we only consider
162	* the first one.
163	*/
164	if (remaining == 0 \|\| *p++ != TLSEXT_NAMETYPE_host_name)
165	return 0;
166	remaining--;
167	/* Now we can finally pull out the byte array with the actual hostname. */
168	if (remaining <= 2)
169	return 0;
170	len = (*(p++) << 8);
171	len += *(p++);
172	if (len + 2 > remaining)
173	return 0;
174	remaining = len;
175	servername = (const char *)p;
176
177	if (len == strlen("server2") && HAS_PREFIX(servername, "server2")) {
178	SSL_CTX *new_ctx = arg;
179	SSL_set_SSL_CTX(s, new_ctx);
180	/*
181	* Copy over all the SSL_CTX options - reasonable behavior
182	* allows testing of cases where the options between two
183	* contexts differ/conflict
184	*/
185	SSL_clear_options(s, 0xFFFFFFFFL);
186	SSL_set_options(s, SSL_CTX_get_options(new_ctx));
187
188	ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
189	return 1;
190	} else if (len == strlen("server1") &&
191	HAS_PREFIX(servername, "server1")) {
192	ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
193	return 1;
194	} else if (ignore) {
195	ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
196	return 1;
197	}
198	return 0;
199	}
200	/*
201	* (RFC 6066):
202	* If the server understood the ClientHello extension but
203	* does not recognize the server name, the server SHOULD take one of two
204	* actions: either abort the handshake by sending a fatal-level
205	* unrecognized_name(112) alert or continue the handshake.
206	*
207	* This behaviour is up to the application to configure; we test both
208	* configurations to ensure the state machine propagates the result
209	* correctly.
210	*/
211	static int servername_ignore_cb(SSL s, int ad, void *arg)
212	{
213	return select_server_ctx(s, arg, 1);
214	}
215
216	static int servername_reject_cb(SSL s, int ad, void *arg)
217	{
218	return select_server_ctx(s, arg, 0);
219	}
220
221	static int client_hello_ignore_cb(SSL s, int al, void *arg)
222	{
223	if (!client_hello_select_server_ctx(s, arg, 1)) {
224	*al = SSL_AD_UNRECOGNIZED_NAME;
225	return SSL_CLIENT_HELLO_ERROR;
226	}
227	return SSL_CLIENT_HELLO_SUCCESS;
228	}
229
230	static int client_hello_reject_cb(SSL s, int al, void *arg)
231	{
232	if (!client_hello_select_server_ctx(s, arg, 0)) {
233	*al = SSL_AD_UNRECOGNIZED_NAME;
234	return SSL_CLIENT_HELLO_ERROR;
235	}
236	return SSL_CLIENT_HELLO_SUCCESS;
237	}
238
239	static int client_hello_nov12_cb(SSL s, int al, void *arg)
240	{
241	int ret;
242	unsigned int v;
243	const unsigned char *p;
244
245	v = SSL_client_hello_get0_legacy_version(s);
246	if (v > TLS1_2_VERSION \|\| v < SSL3_VERSION) {
247	*al = SSL_AD_PROTOCOL_VERSION;
248	return SSL_CLIENT_HELLO_ERROR;
249	}
250	(void)SSL_client_hello_get0_session_id(s, &p);
251	if (p == NULL \|\|
252	SSL_client_hello_get0_random(s, &p) == 0 \|\|
253	SSL_client_hello_get0_ciphers(s, &p) == 0 \|\|
254	SSL_client_hello_get0_compression_methods(s, &p) == 0) {
255	*al = SSL_AD_INTERNAL_ERROR;
256	return SSL_CLIENT_HELLO_ERROR;
257	}
258	ret = client_hello_select_server_ctx(s, arg, 0);
259	SSL_set_max_proto_version(s, TLS1_1_VERSION);
260	if (!ret) {
261	*al = SSL_AD_UNRECOGNIZED_NAME;
262	return SSL_CLIENT_HELLO_ERROR;
263	}
264	return SSL_CLIENT_HELLO_SUCCESS;
265	}
266
267	static unsigned char dummy_ocsp_resp_good_val = 0xff;
268	static unsigned char dummy_ocsp_resp_bad_val = 0xfe;
269
270	static int server_ocsp_cb(SSL s, void arg)
271	{
272	unsigned char *resp;
273
274	resp = OPENSSL_malloc(1);
275	if (resp == NULL)
276	return SSL_TLSEXT_ERR_ALERT_FATAL;
277	/*
278	* For the purposes of testing we just send back a dummy OCSP response
279	*/
280	resp = (unsigned char *)arg;
281	if (!SSL_set_tlsext_status_ocsp_resp(s, resp, 1)) {
282	OPENSSL_free(resp);
283	return SSL_TLSEXT_ERR_ALERT_FATAL;
284	}
285
286	return SSL_TLSEXT_ERR_OK;
287	}
288
289	static int client_ocsp_cb(SSL s, void arg)
290	{
291	const unsigned char *resp;
292	int len;
293
294	len = SSL_get_tlsext_status_ocsp_resp(s, &resp);
295	if (len != 1 \|\| *resp != dummy_ocsp_resp_good_val)
296	return 0;
297
298	return 1;
299	}
300
301	static int verify_reject_cb(X509_STORE_CTX ctx, void arg) {
302	X509_STORE_CTX_set_error(ctx, X509_V_ERR_APPLICATION_VERIFICATION);
303	return 0;
304	}
305
306	static int n_retries = 0;
307	static int verify_retry_cb(X509_STORE_CTX ctx, void arg) {
308	int idx = SSL_get_ex_data_X509_STORE_CTX_idx();
309	SSL *ssl;
310
311	/* this should not happen but check anyway */
312	if (idx < 0
313	\|\| (ssl = X509_STORE_CTX_get_ex_data(ctx, idx)) == NULL)
314	return 0;
315
316	if (--n_retries < 0)
317	return 1;
318
319	return SSL_set_retry_verify(ssl);
320	}
321
322	static int verify_accept_cb(X509_STORE_CTX ctx, void arg) {
323	return 1;
324	}
325
326	static int broken_session_ticket_cb(SSL s, unsigned char key_name,
327	unsigned char iv, EVP_CIPHER_CTX ctx,
328	EVP_MAC_CTX *hctx, int enc)
329	{
330	return 0;
331	}
332
333	static int do_not_call_session_ticket_cb(SSL s, unsigned char key_name,
334	unsigned char *iv,
335	EVP_CIPHER_CTX *ctx,
336	EVP_MAC_CTX *hctx, int enc)
337	{
338	HANDSHAKE_EX_DATA *ex_data =
339	(HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
340	ex_data->session_ticket_do_not_call = 1;
341	return 0;
342	}
343
344	/* Parse the comma-separated list into TLS format. */
345	static int parse_protos(const char protos, unsigned char out, size_t outlen)
346	{
347	size_t len, i, prefix;
348
349	len = strlen(protos);
350
351	if (len == 0) {
352	*out = NULL;
353	*outlen = 0;
354	return 1;
355	}
356
357	/* Should never have reuse. */
358	if (!TEST_ptr_null(*out)
359	/* Test values are small, so we omit length limit checks. */
360	\|\| !TEST_ptr(*out = OPENSSL_malloc(len + 1)))
361	return 0;
362	*outlen = len + 1;
363
364	/*
365	* foo => '3', 'f', 'o', 'o'
366	* foo,bar => '3', 'f', 'o', 'o', '3', 'b', 'a', 'r'
367	*/
368	memcpy(*out + 1, protos, len);
369
370	prefix = 0;
371	i = prefix + 1;
372	while (i <= len) {
373	if ((*out)[i] == ',') {
374	if (!TEST_int_gt(i - 1, prefix))
375	goto err;
376	(*out)[prefix] = (unsigned char)(i - 1 - prefix);
377	prefix = i;
378	}
379	i++;
380	}
381	if (!TEST_int_gt(len, prefix))
382	goto err;
383	(*out)[prefix] = (unsigned char)(len - prefix);
384	return 1;
385
386	err:
387	OPENSSL_free(*out);
388	*out = NULL;
389	return 0;
390	}
391
392	#ifndef OPENSSL_NO_NEXTPROTONEG
393	/*
394	* The client SHOULD select the first protocol advertised by the server that it
395	* also supports. In the event that the client doesn't support any of server's
396	* protocols, or the server doesn't advertise any, it SHOULD select the first
397	* protocol that it supports.
398	*/
399	static int client_npn_cb(SSL s, unsigned char out, unsigned char outlen,
400	const unsigned char *in, unsigned int inlen,
401	void *arg)
402	{
403	CTX_DATA ctx_data = (CTX_DATA)(arg);
404	int ret;
405
406	ret = SSL_select_next_proto(out, outlen, in, inlen,
407	ctx_data->npn_protocols,
408	ctx_data->npn_protocols_len);
409	/* Accept both OPENSSL_NPN_NEGOTIATED and OPENSSL_NPN_NO_OVERLAP. */
410	return TEST_true(ret == OPENSSL_NPN_NEGOTIATED \|\| ret == OPENSSL_NPN_NO_OVERLAP)
411	? SSL_TLSEXT_ERR_OK : SSL_TLSEXT_ERR_ALERT_FATAL;
412	}
413
414	static int server_npn_cb(SSL s, const unsigned char *data,
415	unsigned int len, void arg)
416	{
417	CTX_DATA ctx_data = (CTX_DATA)(arg);
418	*data = ctx_data->npn_protocols;
419	*len = ctx_data->npn_protocols_len;
420	return SSL_TLSEXT_ERR_OK;
421	}
422	#endif
423
424	/*
425	* The server SHOULD select the most highly preferred protocol that it supports
426	* and that is also advertised by the client. In the event that the server
427	* supports no protocols that the client advertises, then the server SHALL
428	* respond with a fatal "no_application_protocol" alert.
429	*/
430	static int server_alpn_cb(SSL s, const unsigned char *out,
431	unsigned char outlen, const unsigned char in,
432	unsigned int inlen, void *arg)
433	{
434	CTX_DATA ctx_data = (CTX_DATA)(arg);
435	int ret;
436
437	/* SSL_select_next_proto isn't const-correct... */
438	unsigned char *tmp_out;
439
440	/*
441	* The result points either to \|in\| or to \|ctx_data->alpn_protocols\|.
442	* The callback is allowed to point to \|in\| or to a long-lived buffer,
443	* so we can return directly without storing a copy.
444	*/
445	ret = SSL_select_next_proto(&tmp_out, outlen,
446	ctx_data->alpn_protocols,
447	ctx_data->alpn_protocols_len, in, inlen);
448
449	*out = tmp_out;
450	/* Unlike NPN, we don't tolerate a mismatch. */
451	return ret == OPENSSL_NPN_NEGOTIATED ? SSL_TLSEXT_ERR_OK
452	: SSL_TLSEXT_ERR_ALERT_FATAL;
453	}
454
455	static int generate_session_ticket_cb(SSL s, void arg)
456	{
457	CTX_DATA *server_ctx_data = arg;
458	SSL_SESSION *ss = SSL_get_session(s);
459	char *app_data = server_ctx_data->session_ticket_app_data;
460
461	if (ss == NULL \|\| app_data == NULL)
462	return 0;
463
464	return SSL_SESSION_set1_ticket_appdata(ss, app_data, strlen(app_data));
465	}
466
467	static int decrypt_session_ticket_cb(SSL s, SSL_SESSION ss,
468	const unsigned char *keyname,
469	size_t keyname_len,
470	SSL_TICKET_STATUS status,
471	void *arg)
472	{
473	switch (status) {
474	case SSL_TICKET_EMPTY:
475	case SSL_TICKET_NO_DECRYPT:
476	return SSL_TICKET_RETURN_IGNORE_RENEW;
477	case SSL_TICKET_SUCCESS:
478	return SSL_TICKET_RETURN_USE;
479	case SSL_TICKET_SUCCESS_RENEW:
480	return SSL_TICKET_RETURN_USE_RENEW;
481	default:
482	break;
483	}
484	return SSL_TICKET_RETURN_ABORT;
485	}
486
487	/*
488	* Configure callbacks and other properties that can't be set directly
489	* in the server/client CONF.
490	*/
491	static int configure_handshake_ctx(SSL_CTX server_ctx, SSL_CTX server2_ctx,
492	SSL_CTX *client_ctx,
493	const SSL_TEST_CTX *test,
494	const SSL_TEST_EXTRA_CONF *extra,
495	CTX_DATA *server_ctx_data,
496	CTX_DATA *server2_ctx_data,
497	CTX_DATA *client_ctx_data)
498	{
499	unsigned char *ticket_keys;
500	size_t ticket_key_len;
501
502	if (!TEST_int_eq(SSL_CTX_set_max_send_fragment(server_ctx,
503	test->max_fragment_size), 1))
504	goto err;
505	if (server2_ctx != NULL) {
506	if (!TEST_int_eq(SSL_CTX_set_max_send_fragment(server2_ctx,
507	test->max_fragment_size),
508	1))
509	goto err;
510	}
511	if (!TEST_int_eq(SSL_CTX_set_max_send_fragment(client_ctx,
512	test->max_fragment_size), 1))
513	goto err;
514
515	switch (extra->client.verify_callback) {
516	case SSL_TEST_VERIFY_ACCEPT_ALL:
517	SSL_CTX_set_cert_verify_callback(client_ctx, &verify_accept_cb, NULL);
518	break;
519	case SSL_TEST_VERIFY_RETRY_ONCE:
520	n_retries = 1;
521	SSL_CTX_set_cert_verify_callback(client_ctx, &verify_retry_cb, NULL);
522	break;
523	case SSL_TEST_VERIFY_REJECT_ALL:
524	SSL_CTX_set_cert_verify_callback(client_ctx, &verify_reject_cb, NULL);
525	break;
526	case SSL_TEST_VERIFY_NONE:
527	break;
528	}
529
530	switch (extra->client.max_fragment_len_mode) {
531	case TLSEXT_max_fragment_length_512:
532	case TLSEXT_max_fragment_length_1024:
533	case TLSEXT_max_fragment_length_2048:
534	case TLSEXT_max_fragment_length_4096:
535	case TLSEXT_max_fragment_length_DISABLED:
536	SSL_CTX_set_tlsext_max_fragment_length(
537	client_ctx, extra->client.max_fragment_len_mode);
538	break;
539	}
540
541	/*
542	* Link the two contexts for SNI purposes.
543	* Also do ClientHello callbacks here, as setting both ClientHello and SNI
544	* is bad.
545	*/
546	switch (extra->server.servername_callback) {
547	case SSL_TEST_SERVERNAME_IGNORE_MISMATCH:
548	SSL_CTX_set_tlsext_servername_callback(server_ctx, servername_ignore_cb);
549	SSL_CTX_set_tlsext_servername_arg(server_ctx, server2_ctx);
550	break;
551	case SSL_TEST_SERVERNAME_REJECT_MISMATCH:
552	SSL_CTX_set_tlsext_servername_callback(server_ctx, servername_reject_cb);
553	SSL_CTX_set_tlsext_servername_arg(server_ctx, server2_ctx);
554	break;
555	case SSL_TEST_SERVERNAME_CB_NONE:
556	break;
557	case SSL_TEST_SERVERNAME_CLIENT_HELLO_IGNORE_MISMATCH:
558	SSL_CTX_set_client_hello_cb(server_ctx, client_hello_ignore_cb, server2_ctx);
559	break;
560	case SSL_TEST_SERVERNAME_CLIENT_HELLO_REJECT_MISMATCH:
561	SSL_CTX_set_client_hello_cb(server_ctx, client_hello_reject_cb, server2_ctx);
562	break;
563	case SSL_TEST_SERVERNAME_CLIENT_HELLO_NO_V12:
564	SSL_CTX_set_client_hello_cb(server_ctx, client_hello_nov12_cb, server2_ctx);
565	}
566
567	if (extra->server.cert_status != SSL_TEST_CERT_STATUS_NONE) {
568	SSL_CTX_set_tlsext_status_type(client_ctx, TLSEXT_STATUSTYPE_ocsp);
569	SSL_CTX_set_tlsext_status_cb(client_ctx, client_ocsp_cb);
570	SSL_CTX_set_tlsext_status_arg(client_ctx, NULL);
571	SSL_CTX_set_tlsext_status_cb(server_ctx, server_ocsp_cb);
572	SSL_CTX_set_tlsext_status_arg(server_ctx,
573	((extra->server.cert_status == SSL_TEST_CERT_STATUS_GOOD_RESPONSE)
574	? &dummy_ocsp_resp_good_val : &dummy_ocsp_resp_bad_val));
575	}
576
577	/*
578	* The initial_ctx/session_ctx always handles the encrypt/decrypt of the
579	* session ticket. This ticket_key callback is assigned to the second
580	* session (assigned via SNI), and should never be invoked
581	*/
582	if (server2_ctx != NULL)
583	SSL_CTX_set_tlsext_ticket_key_evp_cb(server2_ctx,
584	do_not_call_session_ticket_cb);
585
586	if (extra->server.broken_session_ticket) {
587	SSL_CTX_set_tlsext_ticket_key_evp_cb(server_ctx,
588	broken_session_ticket_cb);
589	}
590	#ifndef OPENSSL_NO_NEXTPROTONEG
591	if (extra->server.npn_protocols != NULL) {
592	if (!TEST_true(parse_protos(extra->server.npn_protocols,
593	&server_ctx_data->npn_protocols,
594	&server_ctx_data->npn_protocols_len)))
595	goto err;
596	SSL_CTX_set_npn_advertised_cb(server_ctx, server_npn_cb,
597	server_ctx_data);
598	}
599	if (extra->server2.npn_protocols != NULL) {
600	if (!TEST_true(parse_protos(extra->server2.npn_protocols,
601	&server2_ctx_data->npn_protocols,
602	&server2_ctx_data->npn_protocols_len))
603	\|\| !TEST_ptr(server2_ctx))
604	goto err;
605	SSL_CTX_set_npn_advertised_cb(server2_ctx, server_npn_cb,
606	server2_ctx_data);
607	}
608	if (extra->client.npn_protocols != NULL) {
609	if (!TEST_true(parse_protos(extra->client.npn_protocols,
610	&client_ctx_data->npn_protocols,
611	&client_ctx_data->npn_protocols_len)))
612	goto err;
613	SSL_CTX_set_next_proto_select_cb(client_ctx, client_npn_cb,
614	client_ctx_data);
615	}
616	#endif
617	if (extra->server.alpn_protocols != NULL) {
618	if (!TEST_true(parse_protos(extra->server.alpn_protocols,
619	&server_ctx_data->alpn_protocols,
620	&server_ctx_data->alpn_protocols_len)))
621	goto err;
622	SSL_CTX_set_alpn_select_cb(server_ctx, server_alpn_cb, server_ctx_data);
623	}
624	if (extra->server2.alpn_protocols != NULL) {
625	if (!TEST_ptr(server2_ctx)
626	\|\| !TEST_true(parse_protos(extra->server2.alpn_protocols,
627	&server2_ctx_data->alpn_protocols,
628	&server2_ctx_data->alpn_protocols_len
629	)))
630	goto err;
631	SSL_CTX_set_alpn_select_cb(server2_ctx, server_alpn_cb,
632	server2_ctx_data);
633	}
634	if (extra->client.alpn_protocols != NULL) {
635	unsigned char *alpn_protos = NULL;
636	size_t alpn_protos_len = 0;
637
638	if (!TEST_true(parse_protos(extra->client.alpn_protocols,
639	&alpn_protos, &alpn_protos_len))
640	/* Reversed return value convention... */
641	\|\| !TEST_int_eq(SSL_CTX_set_alpn_protos(client_ctx, alpn_protos,
642	alpn_protos_len), 0))
643	goto err;
644	OPENSSL_free(alpn_protos);
645	}
646
647	if (extra->server.session_ticket_app_data != NULL) {
648	server_ctx_data->session_ticket_app_data =
649	OPENSSL_strdup(extra->server.session_ticket_app_data);
650	if (!TEST_ptr(server_ctx_data->session_ticket_app_data))
651	goto err;
652	SSL_CTX_set_session_ticket_cb(server_ctx, generate_session_ticket_cb,
653	decrypt_session_ticket_cb, server_ctx_data);
654	}
655	if (extra->server2.session_ticket_app_data != NULL) {
656	if (!TEST_ptr(server2_ctx))
657	goto err;
658	server2_ctx_data->session_ticket_app_data =
659	OPENSSL_strdup(extra->server2.session_ticket_app_data);
660	if (!TEST_ptr(server2_ctx_data->session_ticket_app_data))
661	goto err;
662	SSL_CTX_set_session_ticket_cb(server2_ctx, NULL,
663	decrypt_session_ticket_cb, server2_ctx_data);
664	}
665
666	/*
667	* Use fixed session ticket keys so that we can decrypt a ticket created with
668	* one CTX in another CTX. Don't address server2 for the moment.
669	*/
670	ticket_key_len = SSL_CTX_set_tlsext_ticket_keys(server_ctx, NULL, 0);
671	if (!TEST_ptr(ticket_keys = OPENSSL_zalloc(ticket_key_len))
672	\|\| !TEST_int_eq(SSL_CTX_set_tlsext_ticket_keys(server_ctx,
673	ticket_keys,
674	ticket_key_len), 1)) {
675	OPENSSL_free(ticket_keys);
676	goto err;
677	}
678	OPENSSL_free(ticket_keys);
679
680	/* The default log list includes EC keys, so CT can't work without EC. */
681	#if !defined(OPENSSL_NO_CT) && !defined(OPENSSL_NO_EC)
682	if (!TEST_true(SSL_CTX_set_default_ctlog_list_file(client_ctx)))
683	goto err;
684	switch (extra->client.ct_validation) {
685	case SSL_TEST_CT_VALIDATION_PERMISSIVE:
686	if (!TEST_true(SSL_CTX_enable_ct(client_ctx,
687	SSL_CT_VALIDATION_PERMISSIVE)))
688	goto err;
689	break;
690	case SSL_TEST_CT_VALIDATION_STRICT:
691	if (!TEST_true(SSL_CTX_enable_ct(client_ctx, SSL_CT_VALIDATION_STRICT)))
692	goto err;
693	break;
694	case SSL_TEST_CT_VALIDATION_NONE:
695	break;
696	}
697	#endif
698	#ifndef OPENSSL_NO_SRP
699	if (!configure_handshake_ctx_for_srp(server_ctx, server2_ctx, client_ctx,
700	extra, server_ctx_data,
701	server2_ctx_data, client_ctx_data))
702	goto err;
703	#endif /* !OPENSSL_NO_SRP */
704	#ifndef OPENSSL_NO_COMP_ALG
705	if (test->compress_certificates) {
706	if (!TEST_true(SSL_CTX_compress_certs(server_ctx, 0)))
707	goto err;
708	if (server2_ctx != NULL && !TEST_true(SSL_CTX_compress_certs(server2_ctx, 0)))
709	goto err;
710	}
711	#endif
712	return 1;
713	err:
714	return 0;
715	}
716
717	/* Configure per-SSL callbacks and other properties. */
718	static void configure_handshake_ssl(SSL server, SSL client,
719	const SSL_TEST_EXTRA_CONF *extra)
720	{
721	if (extra->client.servername != SSL_TEST_SERVERNAME_NONE)
722	SSL_set_tlsext_host_name(client,
723	ssl_servername_name(extra->client.servername));
724	if (extra->client.enable_pha)
725	SSL_set_post_handshake_auth(client, 1);
726	}
727
728	/* The status for each connection phase. */
729	typedef enum {
730	PEER_SUCCESS,
731	PEER_RETRY,
732	PEER_ERROR,
733	PEER_WAITING,
734	PEER_TEST_FAILURE
735	} peer_status_t;
736
737	/* An SSL object and associated read-write buffers. */
738	typedef struct peer_st {
739	SSL *ssl;
740	/* Buffer lengths are int to match the SSL read/write API. */
741	unsigned char *write_buf;
742	int write_buf_len;
743	unsigned char *read_buf;
744	int read_buf_len;
745	int bytes_to_write;
746	int bytes_to_read;
747	peer_status_t status;
748	} PEER;
749
750	static int create_peer(PEER peer, SSL_CTX ctx)
751	{
752	static const int peer_buffer_size = 64 * 1024;
753	SSL *ssl = NULL;
754	unsigned char read_buf = NULL, write_buf = NULL;
755
756	if (!TEST_ptr(ssl = SSL_new(ctx))
757	\|\| !TEST_ptr(write_buf = OPENSSL_zalloc(peer_buffer_size))
758	\|\| !TEST_ptr(read_buf = OPENSSL_zalloc(peer_buffer_size)))
759	goto err;
760
761	peer->ssl = ssl;
762	peer->write_buf = write_buf;
763	peer->read_buf = read_buf;
764	peer->write_buf_len = peer->read_buf_len = peer_buffer_size;
765	return 1;
766	err:
767	SSL_free(ssl);
768	OPENSSL_free(write_buf);
769	OPENSSL_free(read_buf);
770	return 0;
771	}
772
773	static void peer_free_data(PEER *peer)
774	{
775	SSL_free(peer->ssl);
776	OPENSSL_free(peer->write_buf);
777	OPENSSL_free(peer->read_buf);
778	}
779
780	/*
781	* Note that we could do the handshake transparently under an SSL_write,
782	* but separating the steps is more helpful for debugging test failures.
783	*/
784	static void do_handshake_step(PEER *peer)
785	{
786	if (!TEST_int_eq(peer->status, PEER_RETRY)) {
787	peer->status = PEER_TEST_FAILURE;
788	} else {
789	int ret = SSL_do_handshake(peer->ssl);
790
791	if (ret == 1) {
792	peer->status = PEER_SUCCESS;
793	} else if (ret == 0) {
794	peer->status = PEER_ERROR;
795	} else {
796	int error = SSL_get_error(peer->ssl, ret);
797
798	/* Memory bios should never block with SSL_ERROR_WANT_WRITE. */
799	if (error != SSL_ERROR_WANT_READ
800	&& error != SSL_ERROR_WANT_RETRY_VERIFY)
801	peer->status = PEER_ERROR;
802	}
803	}
804	}
805
806	/*-
807	* Send/receive some application data. The read-write sequence is
808	* Peer A: (R) W - first read will yield no data
809	* Peer B: R W
810	* ...
811	* Peer A: R W
812	* Peer B: R W
813	* Peer A: R
814	*/
815	static void do_app_data_step(PEER *peer)
816	{
817	int ret = 1, write_bytes;
818
819	if (!TEST_int_eq(peer->status, PEER_RETRY)) {
820	peer->status = PEER_TEST_FAILURE;
821	return;
822	}
823
824	/* We read everything available... */
825	while (ret > 0 && peer->bytes_to_read) {
826	ret = SSL_read(peer->ssl, peer->read_buf, peer->read_buf_len);
827	if (ret > 0) {
828	if (!TEST_int_le(ret, peer->bytes_to_read)) {
829	peer->status = PEER_TEST_FAILURE;
830	return;
831	}
832	peer->bytes_to_read -= ret;
833	} else if (ret == 0) {
834	peer->status = PEER_ERROR;
835	return;
836	} else {
837	int error = SSL_get_error(peer->ssl, ret);
838	if (error != SSL_ERROR_WANT_READ) {
839	peer->status = PEER_ERROR;
840	return;
841	} /* Else continue with write. */
842	}
843	}
844
845	/* ... but we only write one write-buffer-full of data. */
846	write_bytes = peer->bytes_to_write < peer->write_buf_len ? peer->bytes_to_write :
847	peer->write_buf_len;
848	if (write_bytes) {
849	ret = SSL_write(peer->ssl, peer->write_buf, write_bytes);
850	if (ret > 0) {
851	/* SSL_write will only succeed with a complete write. */
852	if (!TEST_int_eq(ret, write_bytes)) {
853	peer->status = PEER_TEST_FAILURE;
854	return;
855	}
856	peer->bytes_to_write -= ret;
857	} else {
858	/*
859	* We should perhaps check for SSL_ERROR_WANT_READ/WRITE here
860	* but this doesn't yet occur with current app data sizes.
861	*/
862	peer->status = PEER_ERROR;
863	return;
864	}
865	}
866
867	/*
868	* We could simply finish when there was nothing to read, and we have
869	* nothing left to write. But keeping track of the expected number of bytes
870	* to read gives us somewhat better guarantees that all data sent is in fact
871	* received.
872	*/
873	if (peer->bytes_to_write == 0 && peer->bytes_to_read == 0) {
874	peer->status = PEER_SUCCESS;
875	}
876	}
877
878	static void do_reneg_setup_step(const SSL_TEST_CTX test_ctx, PEER peer)
879	{
880	int ret;
881	char buf;
882
883	if (peer->status == PEER_SUCCESS) {
884	/*
885	* We are a client that succeeded this step previously, but the server
886	* wanted to retry. Probably there is a no_renegotiation warning alert
887	* waiting for us. Attempt to continue the handshake.
888	*/
889	peer->status = PEER_RETRY;
890	do_handshake_step(peer);
891	return;
892	}
893
894	if (!TEST_int_eq(peer->status, PEER_RETRY)
895	\|\| !TEST_true(test_ctx->handshake_mode
896	== SSL_TEST_HANDSHAKE_RENEG_SERVER
897	\|\| test_ctx->handshake_mode
898	== SSL_TEST_HANDSHAKE_RENEG_CLIENT
899	\|\| test_ctx->handshake_mode
900	== SSL_TEST_HANDSHAKE_KEY_UPDATE_SERVER
901	\|\| test_ctx->handshake_mode
902	== SSL_TEST_HANDSHAKE_KEY_UPDATE_CLIENT
903	\|\| test_ctx->handshake_mode
904	== SSL_TEST_HANDSHAKE_POST_HANDSHAKE_AUTH)) {
905	peer->status = PEER_TEST_FAILURE;
906	return;
907	}
908
909	/* Reset the count of the amount of app data we need to read/write */
910	peer->bytes_to_write = peer->bytes_to_read = test_ctx->app_data_size;
911
912	/* Check if we are the peer that is going to initiate */
913	if ((test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_RENEG_SERVER
914	&& SSL_is_server(peer->ssl))
915	\|\| (test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_RENEG_CLIENT
916	&& !SSL_is_server(peer->ssl))) {
917	/*
918	* If we already asked for a renegotiation then fall through to the
919	* SSL_read() below.
920	*/
921	if (!SSL_renegotiate_pending(peer->ssl)) {
922	/*
923	* If we are the client we will always attempt to resume the
924	* session. The server may or may not resume dependent on the
925	* setting of SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
926	*/
927	if (SSL_is_server(peer->ssl)) {
928	ret = SSL_renegotiate(peer->ssl);
929	} else {
930	int full_reneg = 0;
931
932	if (test_ctx->extra.client.no_extms_on_reneg) {
933	SSL_set_options(peer->ssl, SSL_OP_NO_EXTENDED_MASTER_SECRET);
934	full_reneg = 1;
935	}
936	if (test_ctx->extra.client.reneg_ciphers != NULL) {
937	if (!SSL_set_cipher_list(peer->ssl,
938	test_ctx->extra.client.reneg_ciphers)) {
939	peer->status = PEER_ERROR;
940	return;
941	}
942	full_reneg = 1;
943	}
944	if (full_reneg)
945	ret = SSL_renegotiate(peer->ssl);
946	else
947	ret = SSL_renegotiate_abbreviated(peer->ssl);
948	}
949	if (!ret) {
950	peer->status = PEER_ERROR;
951	return;
952	}
953	do_handshake_step(peer);
954	/*
955	* If status is PEER_RETRY it means we're waiting on the peer to
956	* continue the handshake. As far as setting up the renegotiation is
957	* concerned that is a success. The next step will continue the
958	* handshake to its conclusion.
959	*
960	* If status is PEER_SUCCESS then we are the server and we have
961	* successfully sent the HelloRequest. We need to continue to wait
962	* until the handshake arrives from the client.
963	*/
964	if (peer->status == PEER_RETRY)
965	peer->status = PEER_SUCCESS;
966	else if (peer->status == PEER_SUCCESS)
967	peer->status = PEER_RETRY;
968	return;
969	}
970	} else if (test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_KEY_UPDATE_SERVER
971	\|\| test_ctx->handshake_mode
972	== SSL_TEST_HANDSHAKE_KEY_UPDATE_CLIENT) {
973	if (SSL_is_server(peer->ssl)
974	!= (test_ctx->handshake_mode
975	== SSL_TEST_HANDSHAKE_KEY_UPDATE_SERVER)) {
976	peer->status = PEER_SUCCESS;
977	return;
978	}
979
980	ret = SSL_key_update(peer->ssl, test_ctx->key_update_type);
981	if (!ret) {
982	peer->status = PEER_ERROR;
983	return;
984	}
985	do_handshake_step(peer);
986	/*
987	* This is a one step handshake. We shouldn't get anything other than
988	* PEER_SUCCESS
989	*/
990	if (peer->status != PEER_SUCCESS)
991	peer->status = PEER_ERROR;
992	return;
993	} else if (test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_POST_HANDSHAKE_AUTH) {
994	if (SSL_is_server(peer->ssl)) {
995	SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(peer->ssl);
996
997	if (sc == NULL) {
998	peer->status = PEER_ERROR;
999	return;
1000	}
1001	/* Make the server believe it's received the extension */
1002	if (test_ctx->extra.server.force_pha)
1003	sc->post_handshake_auth = SSL_PHA_EXT_RECEIVED;
1004	ret = SSL_verify_client_post_handshake(peer->ssl);
1005	if (!ret) {
1006	peer->status = PEER_ERROR;
1007	return;
1008	}
1009	}
1010	do_handshake_step(peer);
1011	/*
1012	* This is a one step handshake. We shouldn't get anything other than
1013	* PEER_SUCCESS
1014	*/
1015	if (peer->status != PEER_SUCCESS)
1016	peer->status = PEER_ERROR;
1017	return;
1018	}
1019
1020	/*
1021	* The SSL object is still expecting app data, even though it's going to
1022	* get a handshake message. We try to read, and it should fail - after which
1023	* we should be in a handshake
1024	*/
1025	ret = SSL_read(peer->ssl, &buf, sizeof(buf));
1026	if (ret >= 0) {
1027	/*
1028	* We're not actually expecting data - we're expecting a reneg to
1029	* start
1030	*/
1031	peer->status = PEER_ERROR;
1032	return;
1033	} else {
1034	int error = SSL_get_error(peer->ssl, ret);
1035	if (error != SSL_ERROR_WANT_READ) {
1036	peer->status = PEER_ERROR;
1037	return;
1038	}
1039	/* If we're not in init yet then we're not done with setup yet */
1040	if (!SSL_in_init(peer->ssl))
1041	return;
1042	}
1043
1044	peer->status = PEER_SUCCESS;
1045	}
1046
1047
1048	/*
1049	* RFC 5246 says:
1050	*
1051	* Note that as of TLS 1.1,
1052	* failure to properly close a connection no longer requires that a
1053	* session not be resumed. This is a change from TLS 1.0 to conform
1054	* with widespread implementation practice.
1055	*
1056	* However,
1057	* (a) OpenSSL requires that a connection be shutdown for all protocol versions.
1058	* (b) We test lower versions, too.
1059	* So we just implement shutdown. We do a full bidirectional shutdown so that we
1060	* can compare sent and received close_notify alerts and get some test coverage
1061	* for SSL_shutdown as a bonus.
1062	*/
1063	static void do_shutdown_step(PEER *peer)
1064	{
1065	int ret;
1066
1067	if (!TEST_int_eq(peer->status, PEER_RETRY)) {
1068	peer->status = PEER_TEST_FAILURE;
1069	return;
1070	}
1071	ret = SSL_shutdown(peer->ssl);
1072
1073	if (ret == 1) {
1074	peer->status = PEER_SUCCESS;
1075	} else if (ret < 0) { /* On 0, we retry. */
1076	int error = SSL_get_error(peer->ssl, ret);
1077
1078	if (error != SSL_ERROR_WANT_READ && error != SSL_ERROR_WANT_WRITE)
1079	peer->status = PEER_ERROR;
1080	}
1081	}
1082
1083	typedef enum {
1084	HANDSHAKE,
1085	RENEG_APPLICATION_DATA,
1086	RENEG_SETUP,
1087	RENEG_HANDSHAKE,
1088	APPLICATION_DATA,
1089	SHUTDOWN,
1090	CONNECTION_DONE
1091	} connect_phase_t;
1092
1093
1094	static int renegotiate_op(const SSL_TEST_CTX *test_ctx)
1095	{
1096	switch (test_ctx->handshake_mode) {
1097	case SSL_TEST_HANDSHAKE_RENEG_SERVER:
1098	case SSL_TEST_HANDSHAKE_RENEG_CLIENT:
1099	return 1;
1100	default:
1101	return 0;
1102	}
1103	}
1104	static int post_handshake_op(const SSL_TEST_CTX *test_ctx)
1105	{
1106	switch (test_ctx->handshake_mode) {
1107	case SSL_TEST_HANDSHAKE_KEY_UPDATE_CLIENT:
1108	case SSL_TEST_HANDSHAKE_KEY_UPDATE_SERVER:
1109	case SSL_TEST_HANDSHAKE_POST_HANDSHAKE_AUTH:
1110	return 1;
1111	default:
1112	return 0;
1113	}
1114	}
1115
1116	static connect_phase_t next_phase(const SSL_TEST_CTX *test_ctx,
1117	connect_phase_t phase)
1118	{
1119	switch (phase) {
1120	case HANDSHAKE:
1121	if (renegotiate_op(test_ctx) \|\| post_handshake_op(test_ctx))
1122	return RENEG_APPLICATION_DATA;
1123	return APPLICATION_DATA;
1124	case RENEG_APPLICATION_DATA:
1125	return RENEG_SETUP;
1126	case RENEG_SETUP:
1127	if (post_handshake_op(test_ctx))
1128	return APPLICATION_DATA;
1129	return RENEG_HANDSHAKE;
1130	case RENEG_HANDSHAKE:
1131	return APPLICATION_DATA;
1132	case APPLICATION_DATA:
1133	return SHUTDOWN;
1134	case SHUTDOWN:
1135	return CONNECTION_DONE;
1136	case CONNECTION_DONE:
1137	TEST_error("Trying to progress after connection done");
1138	break;
1139	}
1140	return -1;
1141	}
1142
1143	static void do_connect_step(const SSL_TEST_CTX test_ctx, PEER peer,
1144	connect_phase_t phase)
1145	{
1146	switch (phase) {
1147	case HANDSHAKE:
1148	do_handshake_step(peer);
1149	break;
1150	case RENEG_APPLICATION_DATA:
1151	do_app_data_step(peer);
1152	break;
1153	case RENEG_SETUP:
1154	do_reneg_setup_step(test_ctx, peer);
1155	break;
1156	case RENEG_HANDSHAKE:
1157	do_handshake_step(peer);
1158	break;
1159	case APPLICATION_DATA:
1160	do_app_data_step(peer);
1161	break;
1162	case SHUTDOWN:
1163	do_shutdown_step(peer);
1164	break;
1165	case CONNECTION_DONE:
1166	TEST_error("Action after connection done");
1167	break;
1168	}
1169	}
1170
1171	typedef enum {
1172	/* Both parties succeeded. */
1173	HANDSHAKE_SUCCESS,
1174	/* Client errored. */
1175	CLIENT_ERROR,
1176	/* Server errored. */
1177	SERVER_ERROR,
1178	/* Peers are in inconsistent state. */
1179	INTERNAL_ERROR,
1180	/* One or both peers not done. */
1181	HANDSHAKE_RETRY
1182	} handshake_status_t;
1183
1184	/*
1185	* Determine the handshake outcome.
1186	* last_status: the status of the peer to have acted last.
1187	* previous_status: the status of the peer that didn't act last.
1188	* client_spoke_last: 1 if the client went last.
1189	*/
1190	static handshake_status_t handshake_status(peer_status_t last_status,
1191	peer_status_t previous_status,
1192	int client_spoke_last)
1193	{
1194	switch (last_status) {
1195	case PEER_TEST_FAILURE:
1196	return INTERNAL_ERROR;
1197
1198	case PEER_WAITING:
1199	/* Shouldn't ever happen */
1200	return INTERNAL_ERROR;
1201
1202	case PEER_SUCCESS:
1203	switch (previous_status) {
1204	case PEER_TEST_FAILURE:
1205	return INTERNAL_ERROR;
1206	case PEER_SUCCESS:
1207	/* Both succeeded. */
1208	return HANDSHAKE_SUCCESS;
1209	case PEER_WAITING:
1210	case PEER_RETRY:
1211	/* Let the first peer finish. */
1212	return HANDSHAKE_RETRY;
1213	case PEER_ERROR:
1214	/*
1215	* Second peer succeeded despite the fact that the first peer
1216	* already errored. This shouldn't happen.
1217	*/
1218	return INTERNAL_ERROR;
1219	}
1220	break;
1221
1222	case PEER_RETRY:
1223	return HANDSHAKE_RETRY;
1224
1225	case PEER_ERROR:
1226	switch (previous_status) {
1227	case PEER_TEST_FAILURE:
1228	return INTERNAL_ERROR;
1229	case PEER_WAITING:
1230	/* The client failed immediately before sending the ClientHello */
1231	return client_spoke_last ? CLIENT_ERROR : INTERNAL_ERROR;
1232	case PEER_SUCCESS:
1233	/* First peer succeeded but second peer errored. */
1234	return client_spoke_last ? CLIENT_ERROR : SERVER_ERROR;
1235	case PEER_RETRY:
1236	/* We errored; let the peer finish. */
1237	return HANDSHAKE_RETRY;
1238	case PEER_ERROR:
1239	/* Both peers errored. Return the one that errored first. */
1240	return client_spoke_last ? SERVER_ERROR : CLIENT_ERROR;
1241	}
1242	}
1243	/* Control should never reach here. */
1244	return INTERNAL_ERROR;
1245	}
1246
1247	/* Convert unsigned char buf's that shouldn't contain any NUL-bytes to char. */
1248	static char dup_str(const unsigned char in, size_t len)
1249	{
1250	char *ret = NULL;
1251
1252	if (len == 0)
1253	return NULL;
1254
1255	/* Assert that the string does not contain NUL-bytes. */
1256	if (TEST_size_t_eq(OPENSSL_strnlen((const char*)(in), len), len))
1257	TEST_ptr(ret = OPENSSL_strndup((const char*)(in), len));
1258	return ret;
1259	}
1260
1261	static int pkey_type(EVP_PKEY *pkey)
1262	{
1263	if (EVP_PKEY_is_a(pkey, "EC")) {
1264	char name[80];
1265	size_t name_len;
1266
1267	if (!EVP_PKEY_get_group_name(pkey, name, sizeof(name), &name_len))
1268	return NID_undef;
1269	return OBJ_txt2nid(name);
1270	}
1271	return EVP_PKEY_get_id(pkey);
1272	}
1273
1274	static int peer_pkey_type(SSL *s)
1275	{
1276	X509 *x = SSL_get0_peer_certificate(s);
1277
1278	if (x != NULL)
1279	return pkey_type(X509_get0_pubkey(x));
1280	return NID_undef;
1281	}
1282
1283	#if !defined(OPENSSL_NO_SCTP) && !defined(OPENSSL_NO_SOCK)
1284	static int set_sock_as_sctp(int sock)
1285	{
1286	struct sctp_assocparams assocparams;
1287	struct sctp_rtoinfo rto_info;
1288	BIO *tmpbio;
1289
1290	/*
1291	* To allow tests to fail fast (within a second or so), reduce the
1292	* retransmission timeouts and the number of retransmissions.
1293	*/
1294	memset(&rto_info, 0, sizeof(struct sctp_rtoinfo));
1295	rto_info.srto_initial = 100;
1296	rto_info.srto_max = 200;
1297	rto_info.srto_min = 50;
1298	(void)setsockopt(sock, IPPROTO_SCTP, SCTP_RTOINFO,
1299	(const void *)&rto_info, sizeof(struct sctp_rtoinfo));
1300	memset(&assocparams, 0, sizeof(struct sctp_assocparams));
1301	assocparams.sasoc_asocmaxrxt = 2;
1302	(void)setsockopt(sock, IPPROTO_SCTP, SCTP_ASSOCINFO,
1303	(const void *)&assocparams,
1304	sizeof(struct sctp_assocparams));
1305
1306	/*
1307	* For SCTP we have to set various options on the socket prior to
1308	* connecting. This is done automatically by BIO_new_dgram_sctp().
1309	* We don't actually need the created BIO though so we free it again
1310	* immediately.
1311	*/
1312	tmpbio = BIO_new_dgram_sctp(sock, BIO_NOCLOSE);
1313
1314	if (tmpbio == NULL)
1315	return 0;
1316	BIO_free(tmpbio);
1317
1318	return 1;
1319	}
1320
1321	static int create_sctp_socks(int ssock, int csock)
1322	{
1323	BIO_ADDRINFO *res = NULL;
1324	const BIO_ADDRINFO *ai = NULL;
1325	int lsock = INVALID_SOCKET, asock = INVALID_SOCKET;
1326	int consock = INVALID_SOCKET;
1327	int ret = 0;
1328	int family = 0;
1329
1330	if (BIO_sock_init() != 1)
1331	return 0;
1332
1333	/*
1334	* Port is 4463. It could be anything. It will fail if it's already being
1335	* used for some other SCTP service. It seems unlikely though so we don't
1336	* worry about it here.
1337	*/
1338	if (!BIO_lookup_ex(NULL, "4463", BIO_LOOKUP_SERVER, family, SOCK_STREAM,
1339	IPPROTO_SCTP, &res))
1340	return 0;
1341
1342	for (ai = res; ai != NULL; ai = BIO_ADDRINFO_next(ai)) {
1343	family = BIO_ADDRINFO_family(ai);
1344	lsock = BIO_socket(family, SOCK_STREAM, IPPROTO_SCTP, 0);
1345	if (lsock == INVALID_SOCKET) {
1346	/* Maybe the kernel doesn't support the socket family, even if
1347	* BIO_lookup() added it in the returned result...
1348	*/
1349	continue;
1350	}
1351
1352	if (!set_sock_as_sctp(lsock)
1353	\|\| !BIO_listen(lsock, BIO_ADDRINFO_address(ai),
1354	BIO_SOCK_REUSEADDR)) {
1355	BIO_closesocket(lsock);
1356	lsock = INVALID_SOCKET;
1357	continue;
1358	}
1359
1360	/* Success, don't try any more addresses */
1361	break;
1362	}
1363
1364	if (lsock == INVALID_SOCKET)
1365	goto err;
1366
1367	BIO_ADDRINFO_free(res);
1368	res = NULL;
1369
1370	if (!BIO_lookup_ex(NULL, "4463", BIO_LOOKUP_CLIENT, family, SOCK_STREAM,
1371	IPPROTO_SCTP, &res))
1372	goto err;
1373
1374	consock = BIO_socket(family, SOCK_STREAM, IPPROTO_SCTP, 0);
1375	if (consock == INVALID_SOCKET)
1376	goto err;
1377
1378	if (!set_sock_as_sctp(consock)
1379	\|\| !BIO_connect(consock, BIO_ADDRINFO_address(res), 0)
1380	\|\| !BIO_socket_nbio(consock, 1))
1381	goto err;
1382
1383	asock = BIO_accept_ex(lsock, NULL, BIO_SOCK_NONBLOCK);
1384	if (asock == INVALID_SOCKET)
1385	goto err;
1386
1387	*csock = consock;
1388	*ssock = asock;
1389	consock = asock = INVALID_SOCKET;
1390	ret = 1;
1391
1392	err:
1393	BIO_ADDRINFO_free(res);
1394	if (consock != INVALID_SOCKET)
1395	BIO_closesocket(consock);
1396	if (lsock != INVALID_SOCKET)
1397	BIO_closesocket(lsock);
1398	if (asock != INVALID_SOCKET)
1399	BIO_closesocket(asock);
1400	return ret;
1401	}
1402	#endif
1403
1404	/*
1405	* Note that \|extra\| points to the correct client/server configuration
1406	* within \|test_ctx\|. When configuring the handshake, general mode settings
1407	* are taken from \|test_ctx\|, and client/server-specific settings should be
1408	* taken from \|extra\|.
1409	*
1410	* The configuration code should never reach into \|test_ctx->extra\| or
1411	* \|test_ctx->resume_extra\| directly.
1412	*
1413	* (We could refactor test mode settings into a substructure. This would result
1414	* in cleaner argument passing but would complicate the test configuration
1415	* parsing.)
1416	*/
1417	static HANDSHAKE_RESULT *do_handshake_internal(
1418	SSL_CTX server_ctx, SSL_CTX server2_ctx, SSL_CTX *client_ctx,
1419	const SSL_TEST_CTX test_ctx, const SSL_TEST_EXTRA_CONF extra,
1420	SSL_SESSION session_in, SSL_SESSION serv_sess_in,
1421	SSL_SESSION session_out, SSL_SESSION serv_sess_out)
1422	{
1423	PEER server, client;
1424	BIO client_to_server = NULL, server_to_client = NULL;
1425	HANDSHAKE_EX_DATA server_ex_data, client_ex_data;
1426	CTX_DATA client_ctx_data, server_ctx_data, server2_ctx_data;
1427	HANDSHAKE_RESULT *ret = HANDSHAKE_RESULT_new();
1428	int client_turn = 1, client_turn_count = 0, client_wait_count = 0;
1429	connect_phase_t phase = HANDSHAKE;
1430	handshake_status_t status = HANDSHAKE_RETRY;
1431	const unsigned char* tick = NULL;
1432	size_t tick_len = 0;
1433	const unsigned char* sess_id = NULL;
1434	unsigned int sess_id_len = 0;
1435	SSL_SESSION* sess = NULL;
1436	const unsigned char *proto = NULL;
1437	/* API dictates unsigned int rather than size_t. */
1438	unsigned int proto_len = 0;
1439	EVP_PKEY *tmp_key;
1440	const STACK_OF(X509_NAME) *names;
1441	time_t start;
1442	const char* cipher;
1443
1444	if (ret == NULL)
1445	return NULL;
1446
1447	memset(&server_ctx_data, 0, sizeof(server_ctx_data));
1448	memset(&server2_ctx_data, 0, sizeof(server2_ctx_data));
1449	memset(&client_ctx_data, 0, sizeof(client_ctx_data));
1450	memset(&server, 0, sizeof(server));
1451	memset(&client, 0, sizeof(client));
1452	memset(&server_ex_data, 0, sizeof(server_ex_data));
1453	memset(&client_ex_data, 0, sizeof(client_ex_data));
1454
1455	if (!configure_handshake_ctx(server_ctx, server2_ctx, client_ctx,
1456	test_ctx, extra, &server_ctx_data,
1457	&server2_ctx_data, &client_ctx_data)) {
1458	TEST_note("configure_handshake_ctx");
1459	HANDSHAKE_RESULT_free(ret);
1460	return NULL;
1461	}
1462
1463	#if !defined(OPENSSL_NO_SCTP) && !defined(OPENSSL_NO_SOCK)
1464	if (test_ctx->enable_client_sctp_label_bug)
1465	SSL_CTX_set_mode(client_ctx, SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG);
1466	if (test_ctx->enable_server_sctp_label_bug)
1467	SSL_CTX_set_mode(server_ctx, SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG);
1468	#endif
1469
1470	/* Setup SSL and buffers; additional configuration happens below. */
1471	if (!create_peer(&server, server_ctx)) {
1472	TEST_note("creating server context");
1473	goto err;
1474	}
1475	if (!create_peer(&client, client_ctx)) {
1476	TEST_note("creating client context");
1477	goto err;
1478	}
1479
1480	server.bytes_to_write = client.bytes_to_read = test_ctx->app_data_size;
1481	client.bytes_to_write = server.bytes_to_read = test_ctx->app_data_size;
1482
1483	configure_handshake_ssl(server.ssl, client.ssl, extra);
1484	if (session_in != NULL) {
1485	SSL_SESSION_get_id(serv_sess_in, &sess_id_len);
1486	/* In case we're testing resumption without tickets. */
1487	if ((sess_id_len > 0
1488	&& !TEST_true(SSL_CTX_add_session(server_ctx,
1489	serv_sess_in)))
1490	\|\| !TEST_true(SSL_set_session(client.ssl, session_in)))
1491	goto err;
1492	sess_id_len = 0;
1493	}
1494
1495	ret->result = SSL_TEST_INTERNAL_ERROR;
1496
1497	if (test_ctx->use_sctp) {
1498	#if !defined(OPENSSL_NO_SCTP) && !defined(OPENSSL_NO_SOCK)
1499	int csock, ssock;
1500
1501	if (create_sctp_socks(&ssock, &csock)) {
1502	client_to_server = BIO_new_dgram_sctp(csock, BIO_CLOSE);
1503	server_to_client = BIO_new_dgram_sctp(ssock, BIO_CLOSE);
1504	}
1505	#endif
1506	} else {
1507	client_to_server = BIO_new(BIO_s_mem());
1508	server_to_client = BIO_new(BIO_s_mem());
1509	}
1510
1511	if (!TEST_ptr(client_to_server)
1512	\|\| !TEST_ptr(server_to_client))
1513	goto err;
1514
1515	/* Non-blocking bio. */
1516	BIO_set_nbio(client_to_server, 1);
1517	BIO_set_nbio(server_to_client, 1);
1518
1519	SSL_set_connect_state(client.ssl);
1520	SSL_set_accept_state(server.ssl);
1521
1522	/* The bios are now owned by the SSL object. */
1523	if (test_ctx->use_sctp) {
1524	SSL_set_bio(client.ssl, client_to_server, client_to_server);
1525	SSL_set_bio(server.ssl, server_to_client, server_to_client);
1526	} else {
1527	SSL_set_bio(client.ssl, server_to_client, client_to_server);
1528	if (!TEST_int_gt(BIO_up_ref(server_to_client), 0)
1529	\|\| !TEST_int_gt(BIO_up_ref(client_to_server), 0))
1530	goto err;
1531	SSL_set_bio(server.ssl, client_to_server, server_to_client);
1532	}
1533
1534	ex_data_idx = SSL_get_ex_new_index(0, "ex data", NULL, NULL, NULL);
1535	if (!TEST_int_ge(ex_data_idx, 0)
1536	\|\| !TEST_int_eq(SSL_set_ex_data(server.ssl, ex_data_idx, &server_ex_data), 1)
1537	\|\| !TEST_int_eq(SSL_set_ex_data(client.ssl, ex_data_idx, &client_ex_data), 1))
1538	goto err;
1539
1540	SSL_set_info_callback(server.ssl, &info_cb);
1541	SSL_set_info_callback(client.ssl, &info_cb);
1542
1543	client.status = PEER_RETRY;
1544	server.status = PEER_WAITING;
1545
1546	start = time(NULL);
1547
1548	/*
1549	* Half-duplex handshake loop.
1550	* Client and server speak to each other synchronously in the same process.
1551	* We use non-blocking BIOs, so whenever one peer blocks for read, it
1552	* returns PEER_RETRY to indicate that it's the other peer's turn to write.
1553	* The handshake succeeds once both peers have succeeded. If one peer
1554	* errors out, we also let the other peer retry (and presumably fail).
1555	*/
1556	for (;;) {
1557	if (client_turn) {
1558	do_connect_step(test_ctx, &client, phase);
1559	status = handshake_status(client.status, server.status,
1560	1 /* client went last */);
1561	if (server.status == PEER_WAITING)
1562	server.status = PEER_RETRY;
1563	} else {
1564	do_connect_step(test_ctx, &server, phase);
1565	status = handshake_status(server.status, client.status,
1566	0 /* server went last */);
1567	}
1568
1569	switch (status) {
1570	case HANDSHAKE_SUCCESS:
1571	client_turn_count = 0;
1572	phase = next_phase(test_ctx, phase);
1573	if (phase == CONNECTION_DONE) {
1574	ret->result = SSL_TEST_SUCCESS;
1575	goto err;
1576	} else {
1577	client.status = server.status = PEER_RETRY;
1578	/*
1579	* For now, client starts each phase. Since each phase is
1580	* started separately, we can later control this more
1581	* precisely, for example, to test client-initiated and
1582	* server-initiated shutdown.
1583	*/
1584	client_turn = 1;
1585	break;
1586	}
1587	case CLIENT_ERROR:
1588	ret->result = SSL_TEST_CLIENT_FAIL;
1589	goto err;
1590	case SERVER_ERROR:
1591	ret->result = SSL_TEST_SERVER_FAIL;
1592	goto err;
1593	case INTERNAL_ERROR:
1594	ret->result = SSL_TEST_INTERNAL_ERROR;
1595	goto err;
1596	case HANDSHAKE_RETRY:
1597	if (test_ctx->use_sctp) {
1598	if (time(NULL) - start > 3) {
1599	/*
1600	* We've waited for too long. Give up.
1601	*/
1602	ret->result = SSL_TEST_INTERNAL_ERROR;
1603	goto err;
1604	}
1605	/*
1606	* With "real" sockets we only swap to processing the peer
1607	* if they are expecting to retry. Otherwise we just retry the
1608	* same endpoint again.
1609	*/
1610	if ((client_turn && server.status == PEER_RETRY)
1611	\|\| (!client_turn && client.status == PEER_RETRY))
1612	client_turn ^= 1;
1613	} else {
1614	if (client_turn_count++ >= 2000) {
1615	/*
1616	* At this point, there's been so many PEER_RETRY in a row
1617	* that it's likely both sides are stuck waiting for a read.
1618	* It's time to give up.
1619	*/
1620	ret->result = SSL_TEST_INTERNAL_ERROR;
1621	goto err;
1622	}
1623	if (client_turn && server.status == PEER_SUCCESS) {
1624	/*
1625	* The server may finish before the client because the
1626	* client spends some turns processing NewSessionTickets.
1627	*/
1628	if (client_wait_count++ >= 2) {
1629	ret->result = SSL_TEST_INTERNAL_ERROR;
1630	goto err;
1631	}
1632	} else {
1633	/* Continue. */
1634	client_turn ^= 1;
1635	}
1636	}
1637	break;
1638	}
1639	}
1640	err:
1641	ret->server_alert_sent = server_ex_data.alert_sent;
1642	ret->server_num_fatal_alerts_sent = server_ex_data.num_fatal_alerts_sent;
1643	ret->server_alert_received = client_ex_data.alert_received;
1644	ret->client_alert_sent = client_ex_data.alert_sent;
1645	ret->client_num_fatal_alerts_sent = client_ex_data.num_fatal_alerts_sent;
1646	ret->client_alert_received = server_ex_data.alert_received;
1647	ret->server_protocol = SSL_version(server.ssl);
1648	ret->client_protocol = SSL_version(client.ssl);
1649	ret->servername = server_ex_data.servername;
1650	if ((sess = SSL_get0_session(client.ssl)) != NULL) {
1651	SSL_SESSION_get0_ticket(sess, &tick, &tick_len);
1652	sess_id = SSL_SESSION_get_id(sess, &sess_id_len);
1653	}
1654	if (tick == NULL \|\| tick_len == 0)
1655	ret->session_ticket = SSL_TEST_SESSION_TICKET_NO;
1656	else
1657	ret->session_ticket = SSL_TEST_SESSION_TICKET_YES;
1658	ret->compression = (SSL_get_current_compression(client.ssl) == NULL)
1659	? SSL_TEST_COMPRESSION_NO
1660	: SSL_TEST_COMPRESSION_YES;
1661	if (sess_id == NULL \|\| sess_id_len == 0)
1662	ret->session_id = SSL_TEST_SESSION_ID_NO;
1663	else
1664	ret->session_id = SSL_TEST_SESSION_ID_YES;
1665	ret->session_ticket_do_not_call = server_ex_data.session_ticket_do_not_call;
1666
1667	if (extra->client.verify_callback == SSL_TEST_VERIFY_RETRY_ONCE
1668	&& n_retries != -1)
1669	ret->result = SSL_TEST_SERVER_FAIL;
1670
1671	#ifndef OPENSSL_NO_NEXTPROTONEG
1672	SSL_get0_next_proto_negotiated(client.ssl, &proto, &proto_len);
1673	ret->client_npn_negotiated = dup_str(proto, proto_len);
1674
1675	SSL_get0_next_proto_negotiated(server.ssl, &proto, &proto_len);
1676	ret->server_npn_negotiated = dup_str(proto, proto_len);
1677	#endif
1678
1679	SSL_get0_alpn_selected(client.ssl, &proto, &proto_len);
1680	ret->client_alpn_negotiated = dup_str(proto, proto_len);
1681
1682	SSL_get0_alpn_selected(server.ssl, &proto, &proto_len);
1683	ret->server_alpn_negotiated = dup_str(proto, proto_len);
1684
1685	if ((sess = SSL_get0_session(server.ssl)) != NULL) {
1686	SSL_SESSION_get0_ticket_appdata(sess, (void**)&tick, &tick_len);
1687	ret->result_session_ticket_app_data = OPENSSL_strndup((const char*)tick, tick_len);
1688	}
1689
1690	ret->client_resumed = SSL_session_reused(client.ssl);
1691	ret->server_resumed = SSL_session_reused(server.ssl);
1692
1693	cipher = SSL_CIPHER_get_name(SSL_get_current_cipher(client.ssl));
1694	ret->cipher = dup_str((const unsigned char*)cipher, strlen(cipher));
1695
1696	if (session_out != NULL)
1697	*session_out = SSL_get1_session(client.ssl);
1698	if (serv_sess_out != NULL) {
1699	SSL_SESSION *tmp = SSL_get_session(server.ssl);
1700
1701	/*
1702	* We create a fresh copy that is not in the server session ctx linked
1703	* list.
1704	*/
1705	if (tmp != NULL)
1706	*serv_sess_out = SSL_SESSION_dup(tmp);
1707	}
1708
1709	if (SSL_get_peer_tmp_key(client.ssl, &tmp_key)) {
1710	ret->tmp_key_type = pkey_type(tmp_key);
1711	EVP_PKEY_free(tmp_key);
1712	}
1713
1714	SSL_get_peer_signature_nid(client.ssl, &ret->server_sign_hash);
1715	SSL_get_peer_signature_nid(server.ssl, &ret->client_sign_hash);
1716
1717	SSL_get_peer_signature_type_nid(client.ssl, &ret->server_sign_type);
1718	SSL_get_peer_signature_type_nid(server.ssl, &ret->client_sign_type);
1719
1720	names = SSL_get0_peer_CA_list(client.ssl);
1721	if (names == NULL)
1722	ret->client_ca_names = NULL;
1723	else
1724	ret->client_ca_names = SSL_dup_CA_list(names);
1725
1726	names = SSL_get0_peer_CA_list(server.ssl);
1727	if (names == NULL)
1728	ret->server_ca_names = NULL;
1729	else
1730	ret->server_ca_names = SSL_dup_CA_list(names);
1731
1732	ret->server_cert_type = peer_pkey_type(client.ssl);
1733	ret->client_cert_type = peer_pkey_type(server.ssl);
1734
1735	ctx_data_free_data(&server_ctx_data);
1736	ctx_data_free_data(&server2_ctx_data);
1737	ctx_data_free_data(&client_ctx_data);
1738
1739	peer_free_data(&server);
1740	peer_free_data(&client);
1741	return ret;
1742	}
1743
1744	HANDSHAKE_RESULT do_handshake(SSL_CTX server_ctx, SSL_CTX *server2_ctx,
1745	SSL_CTX client_ctx, SSL_CTX resume_server_ctx,
1746	SSL_CTX *resume_client_ctx,
1747	const SSL_TEST_CTX *test_ctx)
1748	{
1749	HANDSHAKE_RESULT *result;
1750	SSL_SESSION session = NULL, serv_sess = NULL;
1751
1752	result = do_handshake_internal(server_ctx, server2_ctx, client_ctx,
1753	test_ctx, &test_ctx->extra,
1754	NULL, NULL, &session, &serv_sess);
1755	if (result == NULL
1756	\|\| test_ctx->handshake_mode != SSL_TEST_HANDSHAKE_RESUME
1757	\|\| result->result == SSL_TEST_INTERNAL_ERROR)
1758	goto end;
1759
1760	if (result->result != SSL_TEST_SUCCESS) {
1761	result->result = SSL_TEST_FIRST_HANDSHAKE_FAILED;
1762	goto end;
1763	}
1764
1765	HANDSHAKE_RESULT_free(result);
1766	/* We don't support SNI on second handshake yet, so server2_ctx is NULL. */
1767	result = do_handshake_internal(resume_server_ctx, NULL, resume_client_ctx,
1768	test_ctx, &test_ctx->resume_extra,
1769	session, serv_sess, NULL, NULL);
1770	end:
1771	SSL_SESSION_free(session);
1772	SSL_SESSION_free(serv_sess);
1773	return result;
1774	}

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