test/dtlstest.c - platform/external/openssl.git - Git at Google

 /*
  * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <string.h>
 #include <openssl/bio.h>
 #include <openssl/crypto.h>
 #include <openssl/ssl.h>
 #include <openssl/err.h>

 #include "ssltestlib.h"
 #include "testutil.h"

 static char *cert = NULL;
 static char *privkey = NULL;
 static unsigned int timer_cb_count;

 #define NUM_TESTS   2


 #define DUMMY_CERT_STATUS_LEN  12

 static unsigned char certstatus[] = {
     SSL3_RT_HANDSHAKE, /* Content type */
     0xfe, 0xfd, /* Record version */
     0, 1, /* Epoch */
     0, 0, 0, 0, 0, 0x0f, /* Record sequence number */
     0, DTLS1_HM_HEADER_LENGTH + DUMMY_CERT_STATUS_LEN - 2,
     SSL3_MT_CERTIFICATE_STATUS, /* Cert Status handshake message type */
     0, 0, DUMMY_CERT_STATUS_LEN, /* Message len */
     0, 5, /* Message sequence */
     0, 0, 0, /* Fragment offset */
     0, 0, DUMMY_CERT_STATUS_LEN - 2, /* Fragment len */
     0x80, 0x80, 0x80, 0x80, 0x80,
     0x80, 0x80, 0x80, 0x80, 0x80 /* Dummy data */
 };

 #define RECORD_SEQUENCE 10

 static unsigned int timer_cb(SSL *s, unsigned int timer_us)
 {
     ++timer_cb_count;

     if (timer_us == 0)
         return 50000;
     else
         return 2 * timer_us;
 }

 static int test_dtls_unprocessed(int testidx)
 {
     SSL_CTX *sctx = NULL, *cctx = NULL;
     SSL *serverssl1 = NULL, *clientssl1 = NULL;
     BIO *c_to_s_fbio, *c_to_s_mempacket;
     int testresult = 0;

     timer_cb_count = 0;

     if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
                                        DTLS_client_method(),
                                        DTLS1_VERSION, DTLS_MAX_VERSION,
                                        &sctx, &cctx, cert, privkey)))
         return 0;

     if (!TEST_true(SSL_CTX_set_cipher_list(cctx, "AES128-SHA")))
         goto end;

     c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
     if (!TEST_ptr(c_to_s_fbio))
         goto end;

     /* BIO is freed by create_ssl_connection on error */
     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl1, &clientssl1,
                                       NULL, c_to_s_fbio)))
         goto end;

     DTLS_set_timer_cb(clientssl1, timer_cb);

     if (testidx == 1)
         certstatus[RECORD_SEQUENCE] = 0xff;

     /*
      * Inject a dummy record from the next epoch. In test 0, this should never
      * get used because the message sequence number is too big. In test 1 we set
      * the record sequence number to be way off in the future.
      */
     c_to_s_mempacket = SSL_get_wbio(clientssl1);
     c_to_s_mempacket = BIO_next(c_to_s_mempacket);
     mempacket_test_inject(c_to_s_mempacket, (char *)certstatus,
                           sizeof(certstatus), 1, INJECT_PACKET_IGNORE_REC_SEQ);

     /*
      * Create the connection. We use "create_bare_ssl_connection" here so that
      * we can force the connection to not do "SSL_read" once partly connected.
      * We don't want to accidentally read the dummy records we injected because
      * they will fail to decrypt.
      */
     if (!TEST_true(create_bare_ssl_connection(serverssl1, clientssl1,
                                               SSL_ERROR_NONE, 0)))
         goto end;

     if (timer_cb_count == 0) {
         printf("timer_callback was not called.\n");
         goto end;
     }

     testresult = 1;
  end:
     SSL_free(serverssl1);
     SSL_free(clientssl1);
     SSL_CTX_free(sctx);
     SSL_CTX_free(cctx);

     return testresult;
 }

 #define CLI_TO_SRV_EPOCH_0_RECS 3
 #define CLI_TO_SRV_EPOCH_1_RECS 1
 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
 # define SRV_TO_CLI_EPOCH_0_RECS 10
 #else
 /*
  * In this case we have no ServerKeyExchange message, because we don't have
  * ECDHE or DHE. When it is present it gets fragmented into 3 records in this
  * test.
  */
 # define SRV_TO_CLI_EPOCH_0_RECS 9
 #endif
 #define SRV_TO_CLI_EPOCH_1_RECS 1
 #define TOTAL_FULL_HAND_RECORDS \
             (CLI_TO_SRV_EPOCH_0_RECS + CLI_TO_SRV_EPOCH_1_RECS + \
              SRV_TO_CLI_EPOCH_0_RECS + SRV_TO_CLI_EPOCH_1_RECS)

 #define CLI_TO_SRV_RESUME_EPOCH_0_RECS 3
 #define CLI_TO_SRV_RESUME_EPOCH_1_RECS 1
 #define SRV_TO_CLI_RESUME_EPOCH_0_RECS 2
 #define SRV_TO_CLI_RESUME_EPOCH_1_RECS 1
 #define TOTAL_RESUME_HAND_RECORDS \
             (CLI_TO_SRV_RESUME_EPOCH_0_RECS + CLI_TO_SRV_RESUME_EPOCH_1_RECS + \
              SRV_TO_CLI_RESUME_EPOCH_0_RECS + SRV_TO_CLI_RESUME_EPOCH_1_RECS)

 #define TOTAL_RECORDS (TOTAL_FULL_HAND_RECORDS + TOTAL_RESUME_HAND_RECORDS)

 static int test_dtls_drop_records(int idx)
 {
     SSL_CTX *sctx = NULL, *cctx = NULL;
     SSL *serverssl = NULL, *clientssl = NULL;
     BIO *c_to_s_fbio, *mempackbio;
     int testresult = 0;
     int epoch = 0;
     SSL_SESSION *sess = NULL;
     int cli_to_srv_epoch0, cli_to_srv_epoch1, srv_to_cli_epoch0;

     if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
                                        DTLS_client_method(),
                                        DTLS1_VERSION, DTLS_MAX_VERSION,
                                        &sctx, &cctx, cert, privkey)))
         return 0;

     if (idx >= TOTAL_FULL_HAND_RECORDS) {
         /* We're going to do a resumption handshake. Get a session first. */
         if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                           NULL, NULL))
                 || !TEST_true(create_ssl_connection(serverssl, clientssl,
                               SSL_ERROR_NONE))
                 || !TEST_ptr(sess = SSL_get1_session(clientssl)))
             goto end;

         SSL_shutdown(clientssl);
         SSL_shutdown(serverssl);
         SSL_free(serverssl);
         SSL_free(clientssl);
         serverssl = clientssl = NULL;

         cli_to_srv_epoch0 = CLI_TO_SRV_RESUME_EPOCH_0_RECS;
         cli_to_srv_epoch1 = CLI_TO_SRV_RESUME_EPOCH_1_RECS;
         srv_to_cli_epoch0 = SRV_TO_CLI_RESUME_EPOCH_0_RECS;
         idx -= TOTAL_FULL_HAND_RECORDS;
     } else {
         cli_to_srv_epoch0 = CLI_TO_SRV_EPOCH_0_RECS;
         cli_to_srv_epoch1 = CLI_TO_SRV_EPOCH_1_RECS;
         srv_to_cli_epoch0 = SRV_TO_CLI_EPOCH_0_RECS;
     }

     c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
     if (!TEST_ptr(c_to_s_fbio))
         goto end;

     /* BIO is freed by create_ssl_connection on error */
     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                       NULL, c_to_s_fbio)))
         goto end;

     if (sess != NULL) {
         if (!TEST_true(SSL_set_session(clientssl, sess)))
             goto end;
     }

     DTLS_set_timer_cb(clientssl, timer_cb);
     DTLS_set_timer_cb(serverssl, timer_cb);

     /* Work out which record to drop based on the test number */
     if (idx >= cli_to_srv_epoch0 + cli_to_srv_epoch1) {
         mempackbio = SSL_get_wbio(serverssl);
         idx -= cli_to_srv_epoch0 + cli_to_srv_epoch1;
         if (idx >= srv_to_cli_epoch0) {
             epoch = 1;
             idx -= srv_to_cli_epoch0;
         }
     } else {
         mempackbio = SSL_get_wbio(clientssl);
         if (idx >= cli_to_srv_epoch0) {
             epoch = 1;
             idx -= cli_to_srv_epoch0;
         }
          mempackbio = BIO_next(mempackbio);
     }
     BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_EPOCH, epoch, NULL);
     BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_REC, idx, NULL);

     if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
         goto end;

     if (sess != NULL && !TEST_true(SSL_session_reused(clientssl)))
         goto end;

     /* If the test did what we planned then it should have dropped a record */
     if (!TEST_int_eq((int)BIO_ctrl(mempackbio, MEMPACKET_CTRL_GET_DROP_REC, 0,
                                    NULL), -1))
         goto end;

     testresult = 1;
  end:
     SSL_SESSION_free(sess);
     SSL_free(serverssl);
     SSL_free(clientssl);
     SSL_CTX_free(sctx);
     SSL_CTX_free(cctx);

     return testresult;
 }

 static const char dummy_cookie[] = "0123456";

 static int generate_cookie_cb(SSL *ssl, unsigned char *cookie,
                               unsigned int *cookie_len)
 {
     memcpy(cookie, dummy_cookie, sizeof(dummy_cookie));
     *cookie_len = sizeof(dummy_cookie);
     return 1;
 }

 static int verify_cookie_cb(SSL *ssl, const unsigned char *cookie,
                             unsigned int cookie_len)
 {
     return TEST_mem_eq(cookie, cookie_len, dummy_cookie, sizeof(dummy_cookie));
 }

 static int test_cookie(void)
 {
     SSL_CTX *sctx = NULL, *cctx = NULL;
     SSL *serverssl = NULL, *clientssl = NULL;
     int testresult = 0;

     if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
                                        DTLS_client_method(),
                                        DTLS1_VERSION, DTLS_MAX_VERSION,
                                        &sctx, &cctx, cert, privkey)))
         return 0;

     SSL_CTX_set_options(sctx, SSL_OP_COOKIE_EXCHANGE);
     SSL_CTX_set_cookie_generate_cb(sctx, generate_cookie_cb);
     SSL_CTX_set_cookie_verify_cb(sctx, verify_cookie_cb);

     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                       NULL, NULL))
             || !TEST_true(create_ssl_connection(serverssl, clientssl,
                                                 SSL_ERROR_NONE)))
         goto end;

     testresult = 1;
  end:
     SSL_free(serverssl);
     SSL_free(clientssl);
     SSL_CTX_free(sctx);
     SSL_CTX_free(cctx);

     return testresult;
 }

 static int test_dtls_duplicate_records(void)
 {
     SSL_CTX *sctx = NULL, *cctx = NULL;
     SSL *serverssl = NULL, *clientssl = NULL;
     int testresult = 0;

     if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
                                        DTLS_client_method(),
                                        DTLS1_VERSION, DTLS_MAX_VERSION,
                                        &sctx, &cctx, cert, privkey)))
         return 0;

     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                       NULL, NULL)))
         goto end;

     DTLS_set_timer_cb(clientssl, timer_cb);
     DTLS_set_timer_cb(serverssl, timer_cb);

     BIO_ctrl(SSL_get_wbio(clientssl), MEMPACKET_CTRL_SET_DUPLICATE_REC, 1, NULL);
     BIO_ctrl(SSL_get_wbio(serverssl), MEMPACKET_CTRL_SET_DUPLICATE_REC, 1, NULL);

     if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
         goto end;

     testresult = 1;
  end:
     SSL_free(serverssl);
     SSL_free(clientssl);
     SSL_CTX_free(sctx);
     SSL_CTX_free(cctx);

     return testresult;
 }

 int setup_tests(void)
 {
     if (!TEST_ptr(cert = test_get_argument(0))
             || !TEST_ptr(privkey = test_get_argument(1)))
         return 0;

     ADD_ALL_TESTS(test_dtls_unprocessed, NUM_TESTS);
     ADD_ALL_TESTS(test_dtls_drop_records, TOTAL_RECORDS);
     ADD_TEST(test_cookie);
     ADD_TEST(test_dtls_duplicate_records);

     return 1;
 }

 void cleanup_tests(void)
 {
     bio_f_tls_dump_filter_free();
     bio_s_mempacket_test_free();
 }
	/*
	* Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the OpenSSL license (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <string.h>
	#include <openssl/bio.h>
	#include <openssl/crypto.h>
	#include <openssl/ssl.h>
	#include <openssl/err.h>

	#include "ssltestlib.h"
	#include "testutil.h"

	static char *cert = NULL;
	static char *privkey = NULL;
	static unsigned int timer_cb_count;

	#define NUM_TESTS 2


	#define DUMMY_CERT_STATUS_LEN 12

	static unsigned char certstatus[] = {
	SSL3_RT_HANDSHAKE, /* Content type */
	0xfe, 0xfd, /* Record version */
	0, 1, /* Epoch */
	0, 0, 0, 0, 0, 0x0f, /* Record sequence number */
	0, DTLS1_HM_HEADER_LENGTH + DUMMY_CERT_STATUS_LEN - 2,
	SSL3_MT_CERTIFICATE_STATUS, /* Cert Status handshake message type */
	0, 0, DUMMY_CERT_STATUS_LEN, /* Message len */
	0, 5, /* Message sequence */
	0, 0, 0, /* Fragment offset */
	0, 0, DUMMY_CERT_STATUS_LEN - 2, /* Fragment len */
	0x80, 0x80, 0x80, 0x80, 0x80,
	0x80, 0x80, 0x80, 0x80, 0x80 /* Dummy data */
	};

	#define RECORD_SEQUENCE 10

	static unsigned int timer_cb(SSL *s, unsigned int timer_us)
	{
	++timer_cb_count;

	if (timer_us == 0)
	return 50000;
	else
	return 2 * timer_us;
	}

	static int test_dtls_unprocessed(int testidx)
	{
	SSL_CTX sctx = NULL, cctx = NULL;
	SSL serverssl1 = NULL, clientssl1 = NULL;
	BIO c_to_s_fbio, c_to_s_mempacket;
	int testresult = 0;

	timer_cb_count = 0;

	if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
	DTLS_client_method(),
	DTLS1_VERSION, DTLS_MAX_VERSION,
	&sctx, &cctx, cert, privkey)))
	return 0;

	if (!TEST_true(SSL_CTX_set_cipher_list(cctx, "AES128-SHA")))
	goto end;

	c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
	if (!TEST_ptr(c_to_s_fbio))
	goto end;

	/* BIO is freed by create_ssl_connection on error */
	if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl1, &clientssl1,
	NULL, c_to_s_fbio)))
	goto end;

	DTLS_set_timer_cb(clientssl1, timer_cb);

	if (testidx == 1)
	certstatus[RECORD_SEQUENCE] = 0xff;

	/*
	* Inject a dummy record from the next epoch. In test 0, this should never
	* get used because the message sequence number is too big. In test 1 we set
	* the record sequence number to be way off in the future.
	*/
	c_to_s_mempacket = SSL_get_wbio(clientssl1);
	c_to_s_mempacket = BIO_next(c_to_s_mempacket);
	mempacket_test_inject(c_to_s_mempacket, (char *)certstatus,
	sizeof(certstatus), 1, INJECT_PACKET_IGNORE_REC_SEQ);

	/*
	* Create the connection. We use "create_bare_ssl_connection" here so that
	* we can force the connection to not do "SSL_read" once partly connected.
	* We don't want to accidentally read the dummy records we injected because
	* they will fail to decrypt.
	*/
	if (!TEST_true(create_bare_ssl_connection(serverssl1, clientssl1,
	SSL_ERROR_NONE, 0)))
	goto end;

	if (timer_cb_count == 0) {
	printf("timer_callback was not called.\n");
	goto end;
	}

	testresult = 1;
	end:
	SSL_free(serverssl1);
	SSL_free(clientssl1);
	SSL_CTX_free(sctx);
	SSL_CTX_free(cctx);

	return testresult;
	}

	#define CLI_TO_SRV_EPOCH_0_RECS 3
	#define CLI_TO_SRV_EPOCH_1_RECS 1
	#if !defined(OPENSSL_NO_EC) \|\| !defined(OPENSSL_NO_DH)
	# define SRV_TO_CLI_EPOCH_0_RECS 10
	#else
	/*
	* In this case we have no ServerKeyExchange message, because we don't have
	* ECDHE or DHE. When it is present it gets fragmented into 3 records in this
	* test.
	*/
	# define SRV_TO_CLI_EPOCH_0_RECS 9
	#endif
	#define SRV_TO_CLI_EPOCH_1_RECS 1
	#define TOTAL_FULL_HAND_RECORDS \
	(CLI_TO_SRV_EPOCH_0_RECS + CLI_TO_SRV_EPOCH_1_RECS + \
	SRV_TO_CLI_EPOCH_0_RECS + SRV_TO_CLI_EPOCH_1_RECS)

	#define CLI_TO_SRV_RESUME_EPOCH_0_RECS 3
	#define CLI_TO_SRV_RESUME_EPOCH_1_RECS 1
	#define SRV_TO_CLI_RESUME_EPOCH_0_RECS 2
	#define SRV_TO_CLI_RESUME_EPOCH_1_RECS 1
	#define TOTAL_RESUME_HAND_RECORDS \
	(CLI_TO_SRV_RESUME_EPOCH_0_RECS + CLI_TO_SRV_RESUME_EPOCH_1_RECS + \
	SRV_TO_CLI_RESUME_EPOCH_0_RECS + SRV_TO_CLI_RESUME_EPOCH_1_RECS)

	#define TOTAL_RECORDS (TOTAL_FULL_HAND_RECORDS + TOTAL_RESUME_HAND_RECORDS)

	static int test_dtls_drop_records(int idx)
	{
	SSL_CTX sctx = NULL, cctx = NULL;
	SSL serverssl = NULL, clientssl = NULL;
	BIO c_to_s_fbio, mempackbio;
	int testresult = 0;
	int epoch = 0;
	SSL_SESSION *sess = NULL;
	int cli_to_srv_epoch0, cli_to_srv_epoch1, srv_to_cli_epoch0;

	if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
	DTLS_client_method(),
	DTLS1_VERSION, DTLS_MAX_VERSION,
	&sctx, &cctx, cert, privkey)))
	return 0;

	if (idx >= TOTAL_FULL_HAND_RECORDS) {
	/* We're going to do a resumption handshake. Get a session first. */
	if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
	NULL, NULL))
	\|\| !TEST_true(create_ssl_connection(serverssl, clientssl,
	SSL_ERROR_NONE))
	\|\| !TEST_ptr(sess = SSL_get1_session(clientssl)))
	goto end;

	SSL_shutdown(clientssl);
	SSL_shutdown(serverssl);
	SSL_free(serverssl);
	SSL_free(clientssl);
	serverssl = clientssl = NULL;

	cli_to_srv_epoch0 = CLI_TO_SRV_RESUME_EPOCH_0_RECS;
	cli_to_srv_epoch1 = CLI_TO_SRV_RESUME_EPOCH_1_RECS;
	srv_to_cli_epoch0 = SRV_TO_CLI_RESUME_EPOCH_0_RECS;
	idx -= TOTAL_FULL_HAND_RECORDS;
	} else {
	cli_to_srv_epoch0 = CLI_TO_SRV_EPOCH_0_RECS;
	cli_to_srv_epoch1 = CLI_TO_SRV_EPOCH_1_RECS;
	srv_to_cli_epoch0 = SRV_TO_CLI_EPOCH_0_RECS;
	}

	c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
	if (!TEST_ptr(c_to_s_fbio))
	goto end;

	/* BIO is freed by create_ssl_connection on error */
	if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
	NULL, c_to_s_fbio)))
	goto end;

	if (sess != NULL) {
	if (!TEST_true(SSL_set_session(clientssl, sess)))
	goto end;
	}

	DTLS_set_timer_cb(clientssl, timer_cb);
	DTLS_set_timer_cb(serverssl, timer_cb);

	/* Work out which record to drop based on the test number */
	if (idx >= cli_to_srv_epoch0 + cli_to_srv_epoch1) {
	mempackbio = SSL_get_wbio(serverssl);
	idx -= cli_to_srv_epoch0 + cli_to_srv_epoch1;
	if (idx >= srv_to_cli_epoch0) {
	epoch = 1;
	idx -= srv_to_cli_epoch0;
	}
	} else {
	mempackbio = SSL_get_wbio(clientssl);
	if (idx >= cli_to_srv_epoch0) {
	epoch = 1;
	idx -= cli_to_srv_epoch0;
	}
	mempackbio = BIO_next(mempackbio);
	}
	BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_EPOCH, epoch, NULL);
	BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_REC, idx, NULL);

	if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
	goto end;

	if (sess != NULL && !TEST_true(SSL_session_reused(clientssl)))
	goto end;

	/* If the test did what we planned then it should have dropped a record */
	if (!TEST_int_eq((int)BIO_ctrl(mempackbio, MEMPACKET_CTRL_GET_DROP_REC, 0,
	NULL), -1))
	goto end;

	testresult = 1;
	end:
	SSL_SESSION_free(sess);
	SSL_free(serverssl);
	SSL_free(clientssl);
	SSL_CTX_free(sctx);
	SSL_CTX_free(cctx);

	return testresult;
	}

	static const char dummy_cookie[] = "0123456";

	static int generate_cookie_cb(SSL ssl, unsigned char cookie,
	unsigned int *cookie_len)
	{
	memcpy(cookie, dummy_cookie, sizeof(dummy_cookie));
	*cookie_len = sizeof(dummy_cookie);
	return 1;
	}

	static int verify_cookie_cb(SSL ssl, const unsigned char cookie,
	unsigned int cookie_len)
	{
	return TEST_mem_eq(cookie, cookie_len, dummy_cookie, sizeof(dummy_cookie));
	}

	static int test_cookie(void)
	{
	SSL_CTX sctx = NULL, cctx = NULL;
	SSL serverssl = NULL, clientssl = NULL;
	int testresult = 0;

	if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
	DTLS_client_method(),
	DTLS1_VERSION, DTLS_MAX_VERSION,
	&sctx, &cctx, cert, privkey)))
	return 0;

	SSL_CTX_set_options(sctx, SSL_OP_COOKIE_EXCHANGE);
	SSL_CTX_set_cookie_generate_cb(sctx, generate_cookie_cb);
	SSL_CTX_set_cookie_verify_cb(sctx, verify_cookie_cb);

	if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
	NULL, NULL))
	\|\| !TEST_true(create_ssl_connection(serverssl, clientssl,
	SSL_ERROR_NONE)))
	goto end;

	testresult = 1;
	end:
	SSL_free(serverssl);
	SSL_free(clientssl);
	SSL_CTX_free(sctx);
	SSL_CTX_free(cctx);

	return testresult;
	}

	static int test_dtls_duplicate_records(void)
	{
	SSL_CTX sctx = NULL, cctx = NULL;
	SSL serverssl = NULL, clientssl = NULL;
	int testresult = 0;

	if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
	DTLS_client_method(),
	DTLS1_VERSION, DTLS_MAX_VERSION,
	&sctx, &cctx, cert, privkey)))
	return 0;

	if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
	NULL, NULL)))
	goto end;

	DTLS_set_timer_cb(clientssl, timer_cb);
	DTLS_set_timer_cb(serverssl, timer_cb);

	BIO_ctrl(SSL_get_wbio(clientssl), MEMPACKET_CTRL_SET_DUPLICATE_REC, 1, NULL);
	BIO_ctrl(SSL_get_wbio(serverssl), MEMPACKET_CTRL_SET_DUPLICATE_REC, 1, NULL);

	if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
	goto end;

	testresult = 1;
	end:
	SSL_free(serverssl);
	SSL_free(clientssl);
	SSL_CTX_free(sctx);
	SSL_CTX_free(cctx);

	return testresult;
	}

	int setup_tests(void)
	{
	if (!TEST_ptr(cert = test_get_argument(0))
	\|\| !TEST_ptr(privkey = test_get_argument(1)))
	return 0;

	ADD_ALL_TESTS(test_dtls_unprocessed, NUM_TESTS);
	ADD_ALL_TESTS(test_dtls_drop_records, TOTAL_RECORDS);
	ADD_TEST(test_cookie);
	ADD_TEST(test_dtls_duplicate_records);

	return 1;
	}

	void cleanup_tests(void)
	{
	bio_f_tls_dump_filter_free();
	bio_s_mempacket_test_free();
	}