test/ssltestlib.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 <string.h>
  11
  12 #include "internal/nelem.h"
  13 #include "ssltestlib.h"
  14 #include "testutil.h"
  15 #include "e_os.h"
  16
  17 #ifdef OPENSSL_SYS_UNIX
  18 # include <unistd.h>
  19
  20 static ossl_inline void ossl_sleep(unsigned int millis) {
  21     usleep(millis * 1000);
  22 }
  23 #elif defined(_WIN32)
  24 # include <windows.h>
  25
  26 static ossl_inline void ossl_sleep(unsigned int millis) {
  27     Sleep(millis);
  28 }
  29 #else
  30 /* Fallback to a busy wait */
  31 static ossl_inline void ossl_sleep(unsigned int millis) {
  32     struct timeval start, now;
  33     unsigned int elapsedms;
  34
  35     gettimeofday(&start, NULL);
  36     do {
  37         gettimeofday(&now, NULL);
  38         elapsedms = (((now.tv_sec - start.tv_sec) * 1000000)
  39                      + now.tv_usec - start.tv_usec) / 1000;
  40     } while (elapsedms < millis);
  41 }
  42 #endif
  43
  44 static int tls_dump_new(BIO *bi);
  45 static int tls_dump_free(BIO *a);
  46 static int tls_dump_read(BIO *b, char *out, int outl);
  47 static int tls_dump_write(BIO *b, const char *in, int inl);
  48 static long tls_dump_ctrl(BIO *b, int cmd, long num, void *ptr);
  49 static int tls_dump_gets(BIO *bp, char *buf, int size);
  50 static int tls_dump_puts(BIO *bp, const char *str);
  51
  52 /* Choose a sufficiently large type likely to be unused for this custom BIO */
  53 #define BIO_TYPE_TLS_DUMP_FILTER  (0x80 | BIO_TYPE_FILTER)
  54 #define BIO_TYPE_MEMPACKET_TEST    0x81
  55
  56 static BIO_METHOD *method_tls_dump = NULL;
  57 static BIO_METHOD *meth_mem = NULL;
  58
  59 /* Note: Not thread safe! */
  60 const BIO_METHOD *bio_f_tls_dump_filter(void)
  61 {
  62     if (method_tls_dump == NULL) {
  63         method_tls_dump = BIO_meth_new(BIO_TYPE_TLS_DUMP_FILTER,
  64                                         "TLS dump filter");
  65         if (   method_tls_dump == NULL
  66             || !BIO_meth_set_write(method_tls_dump, tls_dump_write)
  67             || !BIO_meth_set_read(method_tls_dump, tls_dump_read)
  68             || !BIO_meth_set_puts(method_tls_dump, tls_dump_puts)
  69             || !BIO_meth_set_gets(method_tls_dump, tls_dump_gets)
  70             || !BIO_meth_set_ctrl(method_tls_dump, tls_dump_ctrl)
  71             || !BIO_meth_set_create(method_tls_dump, tls_dump_new)
  72             || !BIO_meth_set_destroy(method_tls_dump, tls_dump_free))
  73             return NULL;
  74     }
  75     return method_tls_dump;
  76 }
  77
  78 void bio_f_tls_dump_filter_free(void)
  79 {
  80     BIO_meth_free(method_tls_dump);
  81 }
  82
  83 static int tls_dump_new(BIO *bio)
  84 {
  85     BIO_set_init(bio, 1);
  86     return 1;
  87 }
  88
  89 static int tls_dump_free(BIO *bio)
  90 {
  91     BIO_set_init(bio, 0);
  92
  93     return 1;
  94 }
  95
  96 static void copy_flags(BIO *bio)
  97 {
  98     int flags;
  99     BIO *next = BIO_next(bio);
 100
 101     flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
 102     BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
 103     BIO_set_flags(bio, flags);
 104 }
 105
 106 #define RECORD_CONTENT_TYPE     0
 107 #define RECORD_VERSION_HI       1
 108 #define RECORD_VERSION_LO       2
 109 #define RECORD_EPOCH_HI         3
 110 #define RECORD_EPOCH_LO         4
 111 #define RECORD_SEQUENCE_START   5
 112 #define RECORD_SEQUENCE_END     10
 113 #define RECORD_LEN_HI           11
 114 #define RECORD_LEN_LO           12
 115
 116 #define MSG_TYPE                0
 117 #define MSG_LEN_HI              1
 118 #define MSG_LEN_MID             2
 119 #define MSG_LEN_LO              3
 120 #define MSG_SEQ_HI              4
 121 #define MSG_SEQ_LO              5
 122 #define MSG_FRAG_OFF_HI         6
 123 #define MSG_FRAG_OFF_MID        7
 124 #define MSG_FRAG_OFF_LO         8
 125 #define MSG_FRAG_LEN_HI         9
 126 #define MSG_FRAG_LEN_MID        10
 127 #define MSG_FRAG_LEN_LO         11
 128
 129
 130 static void dump_data(const char *data, int len)
 131 {
 132     int rem, i, content, reclen, msglen, fragoff, fraglen, epoch;
 133     unsigned char *rec;
 134
 135     printf("---- START OF PACKET ----\n");
 136
 137     rem = len;
 138     rec = (unsigned char *)data;
 139
 140     while (rem > 0) {
 141         if (rem != len)
 142             printf("*\n");
 143         printf("*---- START OF RECORD ----\n");
 144         if (rem < DTLS1_RT_HEADER_LENGTH) {
 145             printf("*---- RECORD TRUNCATED ----\n");
 146             break;
 147         }
 148         content = rec[RECORD_CONTENT_TYPE];
 149         printf("** Record Content-type: %d\n", content);
 150         printf("** Record Version: %02x%02x\n",
 151                rec[RECORD_VERSION_HI], rec[RECORD_VERSION_LO]);
 152         epoch = (rec[RECORD_EPOCH_HI] << 8) | rec[RECORD_EPOCH_LO];
 153         printf("** Record Epoch: %d\n", epoch);
 154         printf("** Record Sequence: ");
 155         for (i = RECORD_SEQUENCE_START; i <= RECORD_SEQUENCE_END; i++)
 156             printf("%02x", rec[i]);
 157         reclen = (rec[RECORD_LEN_HI] << 8) | rec[RECORD_LEN_LO];
 158         printf("\n** Record Length: %d\n", reclen);
 159
 160         /* Now look at message */
 161         rec += DTLS1_RT_HEADER_LENGTH;
 162         rem -= DTLS1_RT_HEADER_LENGTH;
 163         if (content == SSL3_RT_HANDSHAKE) {
 164             printf("**---- START OF HANDSHAKE MESSAGE FRAGMENT ----\n");
 165             if (epoch > 0) {
 166                 printf("**---- HANDSHAKE MESSAGE FRAGMENT ENCRYPTED ----\n");
 167             } else if (rem < DTLS1_HM_HEADER_LENGTH
 168                     || reclen < DTLS1_HM_HEADER_LENGTH) {
 169                 printf("**---- HANDSHAKE MESSAGE FRAGMENT TRUNCATED ----\n");
 170             } else {
 171                 printf("*** Message Type: %d\n", rec[MSG_TYPE]);
 172                 msglen = (rec[MSG_LEN_HI] << 16) | (rec[MSG_LEN_MID] << 8)
 173                          | rec[MSG_LEN_LO];
 174                 printf("*** Message Length: %d\n", msglen);
 175                 printf("*** Message sequence: %d\n",
 176                        (rec[MSG_SEQ_HI] << 8) | rec[MSG_SEQ_LO]);
 177                 fragoff = (rec[MSG_FRAG_OFF_HI] << 16)
 178                           | (rec[MSG_FRAG_OFF_MID] << 8)
 179                           | rec[MSG_FRAG_OFF_LO];
 180                 printf("*** Message Fragment offset: %d\n", fragoff);
 181                 fraglen = (rec[MSG_FRAG_LEN_HI] << 16)
 182                           | (rec[MSG_FRAG_LEN_MID] << 8)
 183                           | rec[MSG_FRAG_LEN_LO];
 184                 printf("*** Message Fragment len: %d\n", fraglen);
 185                 if (fragoff + fraglen > msglen)
 186                     printf("***---- HANDSHAKE MESSAGE FRAGMENT INVALID ----\n");
 187                 else if (reclen < fraglen)
 188                     printf("**---- HANDSHAKE MESSAGE FRAGMENT TRUNCATED ----\n");
 189                 else
 190                     printf("**---- END OF HANDSHAKE MESSAGE FRAGMENT ----\n");
 191             }
 192         }
 193         if (rem < reclen) {
 194             printf("*---- RECORD TRUNCATED ----\n");
 195             rem = 0;
 196         } else {
 197             rec += reclen;
 198             rem -= reclen;
 199             printf("*---- END OF RECORD ----\n");
 200         }
 201     }
 202     printf("---- END OF PACKET ----\n\n");
 203     fflush(stdout);
 204 }
 205
 206 static int tls_dump_read(BIO *bio, char *out, int outl)
 207 {
 208     int ret;
 209     BIO *next = BIO_next(bio);
 210
 211     ret = BIO_read(next, out, outl);
 212     copy_flags(bio);
 213
 214     if (ret > 0) {
 215         dump_data(out, ret);
 216     }
 217
 218     return ret;
 219 }
 220
 221 static int tls_dump_write(BIO *bio, const char *in, int inl)
 222 {
 223     int ret;
 224     BIO *next = BIO_next(bio);
 225
 226     ret = BIO_write(next, in, inl);
 227     copy_flags(bio);
 228
 229     return ret;
 230 }
 231
 232 static long tls_dump_ctrl(BIO *bio, int cmd, long num, void *ptr)
 233 {
 234     long ret;
 235     BIO *next = BIO_next(bio);
 236
 237     if (next == NULL)
 238         return 0;
 239
 240     switch (cmd) {
 241     case BIO_CTRL_DUP:
 242         ret = 0L;
 243         break;
 244     default:
 245         ret = BIO_ctrl(next, cmd, num, ptr);
 246         break;
 247     }
 248     return ret;
 249 }
 250
 251 static int tls_dump_gets(BIO *bio, char *buf, int size)
 252 {
 253     /* We don't support this - not needed anyway */
 254     return -1;
 255 }
 256
 257 static int tls_dump_puts(BIO *bio, const char *str)
 258 {
 259     return tls_dump_write(bio, str, strlen(str));
 260 }
 261
 262
 263 struct mempacket_st {
 264     unsigned char *data;
 265     int len;
 266     unsigned int num;
 267     unsigned int type;
 268 };
 269
 270 static void mempacket_free(MEMPACKET *pkt)
 271 {
 272     if (pkt->data != NULL)
 273         OPENSSL_free(pkt->data);
 274     OPENSSL_free(pkt);
 275 }
 276
 277 typedef struct mempacket_test_ctx_st {
 278     STACK_OF(MEMPACKET) *pkts;
 279     unsigned int epoch;
 280     unsigned int currrec;
 281     unsigned int currpkt;
 282     unsigned int lastpkt;
 283     unsigned int injected;
 284     unsigned int noinject;
 285     unsigned int dropepoch;
 286     int droprec;
 287     int duprec;
 288 } MEMPACKET_TEST_CTX;
 289
 290 static int mempacket_test_new(BIO *bi);
 291 static int mempacket_test_free(BIO *a);
 292 static int mempacket_test_read(BIO *b, char *out, int outl);
 293 static int mempacket_test_write(BIO *b, const char *in, int inl);
 294 static long mempacket_test_ctrl(BIO *b, int cmd, long num, void *ptr);
 295 static int mempacket_test_gets(BIO *bp, char *buf, int size);
 296 static int mempacket_test_puts(BIO *bp, const char *str);
 297
 298 const BIO_METHOD *bio_s_mempacket_test(void)
 299 {
 300     if (meth_mem == NULL) {
 301         if (!TEST_ptr(meth_mem = BIO_meth_new(BIO_TYPE_MEMPACKET_TEST,
 302                                               "Mem Packet Test"))
 303             || !TEST_true(BIO_meth_set_write(meth_mem, mempacket_test_write))
 304             || !TEST_true(BIO_meth_set_read(meth_mem, mempacket_test_read))
 305             || !TEST_true(BIO_meth_set_puts(meth_mem, mempacket_test_puts))
 306             || !TEST_true(BIO_meth_set_gets(meth_mem, mempacket_test_gets))
 307             || !TEST_true(BIO_meth_set_ctrl(meth_mem, mempacket_test_ctrl))
 308             || !TEST_true(BIO_meth_set_create(meth_mem, mempacket_test_new))
 309             || !TEST_true(BIO_meth_set_destroy(meth_mem, mempacket_test_free)))
 310             return NULL;
 311     }
 312     return meth_mem;
 313 }
 314
 315 void bio_s_mempacket_test_free(void)
 316 {
 317     BIO_meth_free(meth_mem);
 318 }
 319
 320 static int mempacket_test_new(BIO *bio)
 321 {
 322     MEMPACKET_TEST_CTX *ctx;
 323
 324     if (!TEST_ptr(ctx = OPENSSL_zalloc(sizeof(*ctx))))
 325         return 0;
 326     if (!TEST_ptr(ctx->pkts = sk_MEMPACKET_new_null())) {
 327         OPENSSL_free(ctx);
 328         return 0;
 329     }
 330     ctx->dropepoch = 0;
 331     ctx->droprec = -1;
 332     BIO_set_init(bio, 1);
 333     BIO_set_data(bio, ctx);
 334     return 1;
 335 }
 336
 337 static int mempacket_test_free(BIO *bio)
 338 {
 339     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 340
 341     sk_MEMPACKET_pop_free(ctx->pkts, mempacket_free);
 342     OPENSSL_free(ctx);
 343     BIO_set_data(bio, NULL);
 344     BIO_set_init(bio, 0);
 345     return 1;
 346 }
 347
 348 /* Record Header values */
 349 #define EPOCH_HI        3
 350 #define EPOCH_LO        4
 351 #define RECORD_SEQUENCE 10
 352 #define RECORD_LEN_HI   11
 353 #define RECORD_LEN_LO   12
 354
 355 #define STANDARD_PACKET                 0
 356
 357 static int mempacket_test_read(BIO *bio, char *out, int outl)
 358 {
 359     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 360     MEMPACKET *thispkt;
 361     unsigned char *rec;
 362     int rem;
 363     unsigned int seq, offset, len, epoch;
 364
 365     BIO_clear_retry_flags(bio);
 366     thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
 367     if (thispkt == NULL || thispkt->num != ctx->currpkt) {
 368         /* Probably run out of data */
 369         BIO_set_retry_read(bio);
 370         return -1;
 371     }
 372     (void)sk_MEMPACKET_shift(ctx->pkts);
 373     ctx->currpkt++;
 374
 375     if (outl > thispkt->len)
 376         outl = thispkt->len;
 377
 378     if (thispkt->type != INJECT_PACKET_IGNORE_REC_SEQ
 379             && (ctx->injected || ctx->droprec >= 0)) {
 380         /*
 381          * Overwrite the record sequence number. We strictly number them in
 382          * the order received. Since we are actually a reliable transport
 383          * we know that there won't be any re-ordering. We overwrite to deal
 384          * with any packets that have been injected
 385          */
 386         for (rem = thispkt->len, rec = thispkt->data; rem > 0; rem -= len) {
 387             if (rem < DTLS1_RT_HEADER_LENGTH)
 388                 return -1;
 389             epoch = (rec[EPOCH_HI] << 8) | rec[EPOCH_LO];
 390             if (epoch != ctx->epoch) {
 391                 ctx->epoch = epoch;
 392                 ctx->currrec = 0;
 393             }
 394             seq = ctx->currrec;
 395             offset = 0;
 396             do {
 397                 rec[RECORD_SEQUENCE - offset] = seq & 0xFF;
 398                 seq >>= 8;
 399                 offset++;
 400             } while (seq > 0);
 401
 402             len = ((rec[RECORD_LEN_HI] << 8) | rec[RECORD_LEN_LO])
 403                   + DTLS1_RT_HEADER_LENGTH;
 404             if (rem < (int)len)
 405                 return -1;
 406             if (ctx->droprec == (int)ctx->currrec && ctx->dropepoch == epoch) {
 407                 if (rem > (int)len)
 408                     memmove(rec, rec + len, rem - len);
 409                 outl -= len;
 410                 ctx->droprec = -1;
 411                 if (outl == 0)
 412                     BIO_set_retry_read(bio);
 413             } else {
 414                 rec += len;
 415             }
 416
 417             ctx->currrec++;
 418         }
 419     }
 420
 421     memcpy(out, thispkt->data, outl);
 422     mempacket_free(thispkt);
 423     return outl;
 424 }
 425
 426 int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
 427                           int type)
 428 {
 429     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 430     MEMPACKET *thispkt = NULL, *looppkt, *nextpkt, *allpkts[3];
 431     int i, duprec = ctx->duprec > 0;
 432     const unsigned char *inu = (const unsigned char *)in;
 433     size_t len = ((inu[RECORD_LEN_HI] << 8) | inu[RECORD_LEN_LO])
 434                  + DTLS1_RT_HEADER_LENGTH;
 435
 436     if (ctx == NULL)
 437         return -1;
 438
 439     if ((size_t)inl < len)
 440         return -1;
 441
 442     if ((size_t)inl == len)
 443         duprec = 0;
 444
 445     /* We don't support arbitrary injection when duplicating records */
 446     if (duprec && pktnum != -1)
 447         return -1;
 448
 449     /* We only allow injection before we've started writing any data */
 450     if (pktnum >= 0) {
 451         if (ctx->noinject)
 452             return -1;
 453         ctx->injected  = 1;
 454     } else {
 455         ctx->noinject = 1;
 456     }
 457
 458     for (i = 0; i < (duprec ? 3 : 1); i++) {
 459         if (!TEST_ptr(allpkts[i] = OPENSSL_malloc(sizeof(*thispkt))))
 460             goto err;
 461         thispkt = allpkts[i];
 462
 463         if (!TEST_ptr(thispkt->data = OPENSSL_malloc(inl)))
 464             goto err;
 465         /*
 466          * If we are duplicating the packet, we duplicate it three times. The
 467          * first two times we drop the first record if there are more than one.
 468          * In this way we know that libssl will not be able to make progress
 469          * until it receives the last packet, and hence will be forced to
 470          * buffer these records.
 471          */
 472         if (duprec && i != 2) {
 473             memcpy(thispkt->data, in + len, inl - len);
 474             thispkt->len = inl - len;
 475         } else {
 476             memcpy(thispkt->data, in, inl);
 477             thispkt->len = inl;
 478         }
 479         thispkt->num = (pktnum >= 0) ? (unsigned int)pktnum : ctx->lastpkt + i;
 480         thispkt->type = type;
 481     }
 482
 483     for(i = 0; (looppkt = sk_MEMPACKET_value(ctx->pkts, i)) != NULL; i++) {
 484         /* Check if we found the right place to insert this packet */
 485         if (looppkt->num > thispkt->num) {
 486             if (sk_MEMPACKET_insert(ctx->pkts, thispkt, i) == 0)
 487                 goto err;
 488             /* If we're doing up front injection then we're done */
 489             if (pktnum >= 0)
 490                 return inl;
 491             /*
 492              * We need to do some accounting on lastpkt. We increment it first,
 493              * but it might now equal the value of injected packets, so we need
 494              * to skip over those
 495              */
 496             ctx->lastpkt++;
 497             do {
 498                 i++;
 499                 nextpkt = sk_MEMPACKET_value(ctx->pkts, i);
 500                 if (nextpkt != NULL && nextpkt->num == ctx->lastpkt)
 501                     ctx->lastpkt++;
 502                 else
 503                     return inl;
 504             } while(1);
 505         } else if (looppkt->num == thispkt->num) {
 506             if (!ctx->noinject) {
 507                 /* We injected two packets with the same packet number! */
 508                 goto err;
 509             }
 510             ctx->lastpkt++;
 511             thispkt->num++;
 512         }
 513     }
 514     /*
 515      * We didn't find any packets with a packet number equal to or greater than
 516      * this one, so we just add it onto the end
 517      */
 518     for (i = 0; i < (duprec ? 3 : 1); i++) {
 519         thispkt = allpkts[i];
 520         if (!sk_MEMPACKET_push(ctx->pkts, thispkt))
 521             goto err;
 522
 523         if (pktnum < 0)
 524             ctx->lastpkt++;
 525     }
 526
 527     return inl;
 528
 529  err:
 530     for (i = 0; i < (ctx->duprec > 0 ? 3 : 1); i++)
 531         mempacket_free(allpkts[i]);
 532     return -1;
 533 }
 534
 535 static int mempacket_test_write(BIO *bio, const char *in, int inl)
 536 {
 537     return mempacket_test_inject(bio, in, inl, -1, STANDARD_PACKET);
 538 }
 539
 540 static long mempacket_test_ctrl(BIO *bio, int cmd, long num, void *ptr)
 541 {
 542     long ret = 1;
 543     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 544     MEMPACKET *thispkt;
 545
 546     switch (cmd) {
 547     case BIO_CTRL_EOF:
 548         ret = (long)(sk_MEMPACKET_num(ctx->pkts) == 0);
 549         break;
 550     case BIO_CTRL_GET_CLOSE:
 551         ret = BIO_get_shutdown(bio);
 552         break;
 553     case BIO_CTRL_SET_CLOSE:
 554         BIO_set_shutdown(bio, (int)num);
 555         break;
 556     case BIO_CTRL_WPENDING:
 557         ret = 0L;
 558         break;
 559     case BIO_CTRL_PENDING:
 560         thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
 561         if (thispkt == NULL)
 562             ret = 0;
 563         else
 564             ret = thispkt->len;
 565         break;
 566     case BIO_CTRL_FLUSH:
 567         ret = 1;
 568         break;
 569     case MEMPACKET_CTRL_SET_DROP_EPOCH:
 570         ctx->dropepoch = (unsigned int)num;
 571         break;
 572     case MEMPACKET_CTRL_SET_DROP_REC:
 573         ctx->droprec = (int)num;
 574         break;
 575     case MEMPACKET_CTRL_GET_DROP_REC:
 576         ret = ctx->droprec;
 577         break;
 578     case MEMPACKET_CTRL_SET_DUPLICATE_REC:
 579         ctx->duprec = (int)num;
 580         break;
 581     case BIO_CTRL_RESET:
 582     case BIO_CTRL_DUP:
 583     case BIO_CTRL_PUSH:
 584     case BIO_CTRL_POP:
 585     default:
 586         ret = 0;
 587         break;
 588     }
 589     return ret;
 590 }
 591
 592 static int mempacket_test_gets(BIO *bio, char *buf, int size)
 593 {
 594     /* We don't support this - not needed anyway */
 595     return -1;
 596 }
 597
 598 static int mempacket_test_puts(BIO *bio, const char *str)
 599 {
 600     return mempacket_test_write(bio, str, strlen(str));
 601 }
 602
 603 int create_ssl_ctx_pair(const SSL_METHOD *sm, const SSL_METHOD *cm,
 604                         int min_proto_version, int max_proto_version,
 605                         SSL_CTX **sctx, SSL_CTX **cctx, char *certfile,
 606                         char *privkeyfile)
 607 {
 608     SSL_CTX *serverctx = NULL;
 609     SSL_CTX *clientctx = NULL;
 610
 611     if (!TEST_ptr(serverctx = SSL_CTX_new(sm))
 612             || (cctx != NULL && !TEST_ptr(clientctx = SSL_CTX_new(cm))))
 613         goto err;
 614
 615     if ((min_proto_version > 0
 616          && !TEST_true(SSL_CTX_set_min_proto_version(serverctx,
 617                                                      min_proto_version)))
 618         || (max_proto_version > 0
 619             && !TEST_true(SSL_CTX_set_max_proto_version(serverctx,
 620                                                         max_proto_version))))
 621         goto err;
 622     if (clientctx != NULL
 623         && ((min_proto_version > 0
 624              && !TEST_true(SSL_CTX_set_min_proto_version(clientctx,
 625                                                          min_proto_version)))
 626             || (max_proto_version > 0
 627                 && !TEST_true(SSL_CTX_set_max_proto_version(clientctx,
 628                                                             max_proto_version)))))
 629         goto err;
 630
 631     if (certfile != NULL && privkeyfile != NULL) {
 632         if (!TEST_int_eq(SSL_CTX_use_certificate_file(serverctx, certfile,
 633                                                       SSL_FILETYPE_PEM), 1)
 634                 || !TEST_int_eq(SSL_CTX_use_PrivateKey_file(serverctx,
 635                                                             privkeyfile,
 636                                                             SSL_FILETYPE_PEM), 1)
 637                 || !TEST_int_eq(SSL_CTX_check_private_key(serverctx), 1))
 638             goto err;
 639     }
 640
 641 #ifndef OPENSSL_NO_DH
 642     SSL_CTX_set_dh_auto(serverctx, 1);
 643 #endif
 644
 645     *sctx = serverctx;
 646     if (cctx != NULL)
 647         *cctx = clientctx;
 648     return 1;
 649
 650  err:
 651     SSL_CTX_free(serverctx);
 652     SSL_CTX_free(clientctx);
 653     return 0;
 654 }
 655
 656 #define MAXLOOPS    1000000
 657
 658 /*
 659  * NOTE: Transfers control of the BIOs - this function will free them on error
 660  */
 661 int create_ssl_objects(SSL_CTX *serverctx, SSL_CTX *clientctx, SSL **sssl,
 662                           SSL **cssl, BIO *s_to_c_fbio, BIO *c_to_s_fbio)
 663 {
 664     SSL *serverssl = NULL, *clientssl = NULL;
 665     BIO *s_to_c_bio = NULL, *c_to_s_bio = NULL;
 666
 667     if (*sssl != NULL)
 668         serverssl = *sssl;
 669     else if (!TEST_ptr(serverssl = SSL_new(serverctx)))
 670         goto error;
 671     if (*cssl != NULL)
 672         clientssl = *cssl;
 673     else if (!TEST_ptr(clientssl = SSL_new(clientctx)))
 674         goto error;
 675
 676     if (SSL_is_dtls(clientssl)) {
 677         if (!TEST_ptr(s_to_c_bio = BIO_new(bio_s_mempacket_test()))
 678                 || !TEST_ptr(c_to_s_bio = BIO_new(bio_s_mempacket_test())))
 679             goto error;
 680     } else {
 681         if (!TEST_ptr(s_to_c_bio = BIO_new(BIO_s_mem()))
 682                 || !TEST_ptr(c_to_s_bio = BIO_new(BIO_s_mem())))
 683             goto error;
 684     }
 685
 686     if (s_to_c_fbio != NULL
 687             && !TEST_ptr(s_to_c_bio = BIO_push(s_to_c_fbio, s_to_c_bio)))
 688         goto error;
 689     if (c_to_s_fbio != NULL
 690             && !TEST_ptr(c_to_s_bio = BIO_push(c_to_s_fbio, c_to_s_bio)))
 691         goto error;
 692
 693     /* Set Non-blocking IO behaviour */
 694     BIO_set_mem_eof_return(s_to_c_bio, -1);
 695     BIO_set_mem_eof_return(c_to_s_bio, -1);
 696
 697     /* Up ref these as we are passing them to two SSL objects */
 698     SSL_set_bio(serverssl, c_to_s_bio, s_to_c_bio);
 699     BIO_up_ref(s_to_c_bio);
 700     BIO_up_ref(c_to_s_bio);
 701     SSL_set_bio(clientssl, s_to_c_bio, c_to_s_bio);
 702     *sssl = serverssl;
 703     *cssl = clientssl;
 704     return 1;
 705
 706  error:
 707     SSL_free(serverssl);
 708     SSL_free(clientssl);
 709     BIO_free(s_to_c_bio);
 710     BIO_free(c_to_s_bio);
 711     BIO_free(s_to_c_fbio);
 712     BIO_free(c_to_s_fbio);
 713
 714     return 0;
 715 }
 716
 717 /*
 718  * Create an SSL connection, but does not ready any post-handshake
 719  * NewSessionTicket messages.
 720  */
 721 int create_bare_ssl_connection(SSL *serverssl, SSL *clientssl, int want)
 722 {
 723     int retc = -1, rets = -1, err, abortctr = 0;
 724     int clienterr = 0, servererr = 0;
 725     int isdtls = SSL_is_dtls(serverssl);
 726
 727     do {
 728         err = SSL_ERROR_WANT_WRITE;
 729         while (!clienterr && retc <= 0 && err == SSL_ERROR_WANT_WRITE) {
 730             retc = SSL_connect(clientssl);
 731             if (retc <= 0)
 732                 err = SSL_get_error(clientssl, retc);
 733         }
 734
 735         if (!clienterr && retc <= 0 && err != SSL_ERROR_WANT_READ) {
 736             TEST_info("SSL_connect() failed %d, %d", retc, err);
 737             clienterr = 1;
 738         }
 739         if (want != SSL_ERROR_NONE && err == want)
 740             return 0;
 741
 742         err = SSL_ERROR_WANT_WRITE;
 743         while (!servererr && rets <= 0 && err == SSL_ERROR_WANT_WRITE) {
 744             rets = SSL_accept(serverssl);
 745             if (rets <= 0)
 746                 err = SSL_get_error(serverssl, rets);
 747         }
 748
 749         if (!servererr && rets <= 0
 750                 && err != SSL_ERROR_WANT_READ
 751                 && err != SSL_ERROR_WANT_X509_LOOKUP) {
 752             TEST_info("SSL_accept() failed %d, %d", rets, err);
 753             servererr = 1;
 754         }
 755         if (want != SSL_ERROR_NONE && err == want)
 756             return 0;
 757         if (clienterr && servererr)
 758             return 0;
 759         if (isdtls) {
 760             if (rets > 0 && retc <= 0)
 761                 DTLSv1_handle_timeout(serverssl);
 762             if (retc > 0 && rets <= 0)
 763                 DTLSv1_handle_timeout(clientssl);
 764         }
 765         if (++abortctr == MAXLOOPS) {
 766             TEST_info("No progress made");
 767             return 0;
 768         }
 769         if (isdtls && abortctr <= 50 && (abortctr % 10) == 0) {
 770             /*
 771              * It looks like we're just spinning. Pause for a short period to
 772              * give the DTLS timer a chance to do something. We only do this for
 773              * the first few times to prevent hangs.
 774              */
 775             ossl_sleep(50);
 776         }
 777     } while (retc <=0 || rets <= 0);
 778
 779     return 1;
 780 }
 781
 782 /*
 783  * Create an SSL connection including any post handshake NewSessionTicket
 784  * messages.
 785  */
 786 int create_ssl_connection(SSL *serverssl, SSL *clientssl, int want)
 787 {
 788     int i;
 789     unsigned char buf;
 790     size_t readbytes;
 791
 792     if (!create_bare_ssl_connection(serverssl, clientssl, want))
 793         return 0;
 794
 795     /*
 796      * We attempt to read some data on the client side which we expect to fail.
 797      * This will ensure we have received the NewSessionTicket in TLSv1.3 where
 798      * appropriate. We do this twice because there are 2 NewSesionTickets.
 799      */
 800     for (i = 0; i < 2; i++) {
 801         if (SSL_read_ex(clientssl, &buf, sizeof(buf), &readbytes) > 0) {
 802             if (!TEST_ulong_eq(readbytes, 0))
 803                 return 0;
 804         } else if (!TEST_int_eq(SSL_get_error(clientssl, 0),
 805                                 SSL_ERROR_WANT_READ)) {
 806             return 0;
 807         }
 808     }
 809
 810     return 1;
 811 }
 812
 813 void shutdown_ssl_connection(SSL *serverssl, SSL *clientssl)
 814 {
 815     SSL_shutdown(clientssl);
 816     SSL_shutdown(serverssl);
 817     SSL_free(serverssl);
 818     SSL_free(clientssl);
 819 }