test/dtlstest.c

   1 /*
   2  * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 <openssl/bio.h>
  11 #include <openssl/crypto.h>
  12 #include <openssl/ssl.h>
  13 #include <openssl/err.h>
  14
  15 #include "ssltestlib.h"
  16 #include "testutil.h"
  17
  18 static char *cert = NULL;
  19 static char *privkey = NULL;
  20 static unsigned int timer_cb_count;
  21
  22 #define NUM_TESTS   2
  23
  24
  25 #define DUMMY_CERT_STATUS_LEN  12
  26
  27 static unsigned char certstatus[] = {
  28     SSL3_RT_HANDSHAKE, /* Content type */
  29     0xfe, 0xfd, /* Record version */
  30     0, 1, /* Epoch */
  31     0, 0, 0, 0, 0, 0x0f, /* Record sequence number */
  32     0, DTLS1_HM_HEADER_LENGTH + DUMMY_CERT_STATUS_LEN - 2,
  33     SSL3_MT_CERTIFICATE_STATUS, /* Cert Status handshake message type */
  34     0, 0, DUMMY_CERT_STATUS_LEN, /* Message len */
  35     0, 5, /* Message sequence */
  36     0, 0, 0, /* Fragment offset */
  37     0, 0, DUMMY_CERT_STATUS_LEN - 2, /* Fragment len */
  38     0x80, 0x80, 0x80, 0x80, 0x80,
  39     0x80, 0x80, 0x80, 0x80, 0x80 /* Dummy data */
  40 };
  41
  42 #define RECORD_SEQUENCE 10
  43
  44 static unsigned int timer_cb(SSL *s, unsigned int timer_us)
  45 {
  46     ++timer_cb_count;
  47
  48     if (timer_us == 0)
  49         return 50000;
  50     else
  51         return 2 * timer_us;
  52 }
  53
  54 static int test_dtls_unprocessed(int testidx)
  55 {
  56     SSL_CTX *sctx = NULL, *cctx = NULL;
  57     SSL *serverssl1 = NULL, *clientssl1 = NULL;
  58     BIO *c_to_s_fbio, *c_to_s_mempacket;
  59     int testresult = 0;
  60
  61     timer_cb_count = 0;
  62
  63     if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
  64                                        DTLS_client_method(),
  65                                        DTLS1_VERSION, DTLS_MAX_VERSION,
  66                                        &sctx, &cctx, cert, privkey)))
  67         return 0;
  68
  69     if (!TEST_true(SSL_CTX_set_cipher_list(cctx, "AES128-SHA")))
  70         goto end;
  71
  72     c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
  73     if (!TEST_ptr(c_to_s_fbio))
  74         goto end;
  75
  76     /* BIO is freed by create_ssl_connection on error */
  77     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl1, &clientssl1,
  78                                       NULL, c_to_s_fbio)))
  79         goto end;
  80
  81     DTLS_set_timer_cb(clientssl1, timer_cb);
  82
  83     if (testidx == 1)
  84         certstatus[RECORD_SEQUENCE] = 0xff;
  85
  86     /*
  87      * Inject a dummy record from the next epoch. In test 0, this should never
  88      * get used because the message sequence number is too big. In test 1 we set
  89      * the record sequence number to be way off in the future. This should not
  90      * have an impact on the record replay protection because the record should
  91      * be dropped before it is marked as arrived
  92      */
  93     c_to_s_mempacket = SSL_get_wbio(clientssl1);
  94     c_to_s_mempacket = BIO_next(c_to_s_mempacket);
  95     mempacket_test_inject(c_to_s_mempacket, (char *)certstatus,
  96                           sizeof(certstatus), 1, INJECT_PACKET_IGNORE_REC_SEQ);
  97
  98     if (!TEST_true(create_ssl_connection(serverssl1, clientssl1,
  99                                          SSL_ERROR_NONE)))
 100         goto end;
 101
 102     if (timer_cb_count == 0) {
 103         printf("timer_callback was not called.\n");
 104         goto end;
 105     }
 106
 107     testresult = 1;
 108  end:
 109     SSL_free(serverssl1);
 110     SSL_free(clientssl1);
 111     SSL_CTX_free(sctx);
 112     SSL_CTX_free(cctx);
 113
 114     return testresult;
 115 }
 116
 117 #define CLI_TO_SRV_EPOCH_0_RECS 3
 118 #define CLI_TO_SRV_EPOCH_1_RECS 1
 119 #define SRV_TO_CLI_EPOCH_0_RECS 12
 120 #define SRV_TO_CLI_EPOCH_1_RECS 1
 121 #define TOTAL_FULL_HAND_RECORDS \
 122             (CLI_TO_SRV_EPOCH_0_RECS + CLI_TO_SRV_EPOCH_1_RECS + \
 123              SRV_TO_CLI_EPOCH_0_RECS + SRV_TO_CLI_EPOCH_1_RECS)
 124
 125 #define CLI_TO_SRV_RESUME_EPOCH_0_RECS 3
 126 #define CLI_TO_SRV_RESUME_EPOCH_1_RECS 1
 127 #define SRV_TO_CLI_RESUME_EPOCH_0_RECS 2
 128 #define SRV_TO_CLI_RESUME_EPOCH_1_RECS 1
 129 #define TOTAL_RESUME_HAND_RECORDS \
 130             (CLI_TO_SRV_RESUME_EPOCH_0_RECS + CLI_TO_SRV_RESUME_EPOCH_1_RECS + \
 131              SRV_TO_CLI_RESUME_EPOCH_0_RECS + SRV_TO_CLI_RESUME_EPOCH_1_RECS)
 132
 133 #define TOTAL_RECORDS (TOTAL_FULL_HAND_RECORDS + TOTAL_RESUME_HAND_RECORDS)
 134
 135 static int test_dtls_drop_records(int idx)
 136 {
 137     SSL_CTX *sctx = NULL, *cctx = NULL;
 138     SSL *serverssl = NULL, *clientssl = NULL;
 139     BIO *c_to_s_fbio, *mempackbio;
 140     int testresult = 0;
 141     int epoch = 0;
 142     SSL_SESSION *sess = NULL;
 143     int cli_to_srv_epoch0, cli_to_srv_epoch1, srv_to_cli_epoch0;
 144
 145     if (!TEST_true(create_ssl_ctx_pair(DTLS_server_method(),
 146                                        DTLS_client_method(),
 147                                        DTLS1_VERSION, DTLS_MAX_VERSION,
 148                                        &sctx, &cctx, cert, privkey)))
 149         return 0;
 150
 151     if (idx >= TOTAL_FULL_HAND_RECORDS) {
 152         /* We're going to do a resumption handshake. Get a session first. */
 153         if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
 154                                           NULL, NULL))
 155                 || !TEST_true(create_ssl_connection(serverssl, clientssl,
 156                               SSL_ERROR_NONE))
 157                 || !TEST_ptr(sess = SSL_get1_session(clientssl)))
 158             goto end;
 159
 160         SSL_shutdown(clientssl);
 161         SSL_shutdown(serverssl);
 162         SSL_free(serverssl);
 163         SSL_free(clientssl);
 164         serverssl = clientssl = NULL;
 165
 166         cli_to_srv_epoch0 = CLI_TO_SRV_RESUME_EPOCH_0_RECS;
 167         cli_to_srv_epoch1 = CLI_TO_SRV_RESUME_EPOCH_1_RECS;
 168         srv_to_cli_epoch0 = SRV_TO_CLI_RESUME_EPOCH_0_RECS;
 169         idx -= TOTAL_FULL_HAND_RECORDS;
 170     } else {
 171         cli_to_srv_epoch0 = CLI_TO_SRV_EPOCH_0_RECS;
 172         cli_to_srv_epoch1 = CLI_TO_SRV_EPOCH_1_RECS;
 173         srv_to_cli_epoch0 = SRV_TO_CLI_EPOCH_0_RECS;
 174     }
 175
 176     c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
 177     if (!TEST_ptr(c_to_s_fbio))
 178         goto end;
 179
 180     /* BIO is freed by create_ssl_connection on error */
 181     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
 182                                       NULL, c_to_s_fbio)))
 183         goto end;
 184
 185     if (sess != NULL) {
 186         if (!TEST_true(SSL_set_session(clientssl, sess)))
 187             goto end;
 188     }
 189
 190     DTLS_set_timer_cb(clientssl, timer_cb);
 191     DTLS_set_timer_cb(serverssl, timer_cb);
 192
 193     /* Work out which record to drop based on the test number */
 194     if (idx >= cli_to_srv_epoch0 + cli_to_srv_epoch1) {
 195         mempackbio = SSL_get_wbio(serverssl);
 196         idx -= cli_to_srv_epoch0 + cli_to_srv_epoch1;
 197         if (idx >= srv_to_cli_epoch0) {
 198             epoch = 1;
 199             idx -= srv_to_cli_epoch0;
 200         }
 201     } else {
 202         mempackbio = SSL_get_wbio(clientssl);
 203         if (idx >= cli_to_srv_epoch0) {
 204             epoch = 1;
 205             idx -= cli_to_srv_epoch0;
 206         }
 207          mempackbio = BIO_next(mempackbio);
 208     }
 209     BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_EPOCH, epoch, NULL);
 210     BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_REC, idx, NULL);
 211
 212     if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
 213         goto end;
 214
 215     if (sess != NULL && !TEST_true(SSL_session_reused(clientssl)))
 216         goto end;
 217
 218     /* If the test did what we planned then it should have dropped a record */
 219     if (!TEST_int_eq((int)BIO_ctrl(mempackbio, MEMPACKET_CTRL_GET_DROP_REC, 0,
 220                                    NULL), -1))
 221         goto end;
 222
 223     testresult = 1;
 224  end:
 225     SSL_SESSION_free(sess);
 226     SSL_free(serverssl);
 227     SSL_free(clientssl);
 228     SSL_CTX_free(sctx);
 229     SSL_CTX_free(cctx);
 230
 231     return testresult;
 232 }
 233
 234 int setup_tests(void)
 235 {
 236     if (!TEST_ptr(cert = test_get_argument(0))
 237             || !TEST_ptr(privkey = test_get_argument(1)))
 238         return 0;
 239
 240     ADD_ALL_TESTS(test_dtls_unprocessed, NUM_TESTS);
 241     ADD_ALL_TESTS(test_dtls_drop_records, TOTAL_RECORDS);
 242
 243     return 1;
 244 }
 245
 246 void cleanup_tests(void)
 247 {
 248     bio_f_tls_dump_filter_free();
 249     bio_s_mempacket_test_free();
 250 }