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 } MEMPACKET_TEST_CTX;
 288
 289 static int mempacket_test_new(BIO *bi);
 290 static int mempacket_test_free(BIO *a);
 291 static int mempacket_test_read(BIO *b, char *out, int outl);
 292 static int mempacket_test_write(BIO *b, const char *in, int inl);
 293 static long mempacket_test_ctrl(BIO *b, int cmd, long num, void *ptr);
 294 static int mempacket_test_gets(BIO *bp, char *buf, int size);
 295 static int mempacket_test_puts(BIO *bp, const char *str);
 296
 297 const BIO_METHOD *bio_s_mempacket_test(void)
 298 {
 299     if (meth_mem == NULL) {
 300         if (!TEST_ptr(meth_mem = BIO_meth_new(BIO_TYPE_MEMPACKET_TEST,
 301                                               "Mem Packet Test"))
 302             || !TEST_true(BIO_meth_set_write(meth_mem, mempacket_test_write))
 303             || !TEST_true(BIO_meth_set_read(meth_mem, mempacket_test_read))
 304             || !TEST_true(BIO_meth_set_puts(meth_mem, mempacket_test_puts))
 305             || !TEST_true(BIO_meth_set_gets(meth_mem, mempacket_test_gets))
 306             || !TEST_true(BIO_meth_set_ctrl(meth_mem, mempacket_test_ctrl))
 307             || !TEST_true(BIO_meth_set_create(meth_mem, mempacket_test_new))
 308             || !TEST_true(BIO_meth_set_destroy(meth_mem, mempacket_test_free)))
 309             return NULL;
 310     }
 311     return meth_mem;
 312 }
 313
 314 void bio_s_mempacket_test_free(void)
 315 {
 316     BIO_meth_free(meth_mem);
 317 }
 318
 319 static int mempacket_test_new(BIO *bio)
 320 {
 321     MEMPACKET_TEST_CTX *ctx;
 322
 323     if (!TEST_ptr(ctx = OPENSSL_zalloc(sizeof(*ctx))))
 324         return 0;
 325     if (!TEST_ptr(ctx->pkts = sk_MEMPACKET_new_null())) {
 326         OPENSSL_free(ctx);
 327         return 0;
 328     }
 329     ctx->dropepoch = 0;
 330     ctx->droprec = -1;
 331     BIO_set_init(bio, 1);
 332     BIO_set_data(bio, ctx);
 333     return 1;
 334 }
 335
 336 static int mempacket_test_free(BIO *bio)
 337 {
 338     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 339
 340     sk_MEMPACKET_pop_free(ctx->pkts, mempacket_free);
 341     OPENSSL_free(ctx);
 342     BIO_set_data(bio, NULL);
 343     BIO_set_init(bio, 0);
 344     return 1;
 345 }
 346
 347 /* Record Header values */
 348 #define EPOCH_HI        3
 349 #define EPOCH_LO        4
 350 #define RECORD_SEQUENCE 10
 351 #define RECORD_LEN_HI   11
 352 #define RECORD_LEN_LO   12
 353
 354 #define STANDARD_PACKET                 0
 355
 356 static int mempacket_test_read(BIO *bio, char *out, int outl)
 357 {
 358     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 359     MEMPACKET *thispkt;
 360     unsigned char *rec;
 361     int rem;
 362     unsigned int seq, offset, len, epoch;
 363
 364     BIO_clear_retry_flags(bio);
 365     thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
 366     if (thispkt == NULL || thispkt->num != ctx->currpkt) {
 367         /* Probably run out of data */
 368         BIO_set_retry_read(bio);
 369         return -1;
 370     }
 371     (void)sk_MEMPACKET_shift(ctx->pkts);
 372     ctx->currpkt++;
 373
 374     if (outl > thispkt->len)
 375         outl = thispkt->len;
 376
 377     if (thispkt->type != INJECT_PACKET_IGNORE_REC_SEQ
 378             && (ctx->injected || ctx->droprec >= 0)) {
 379         /*
 380          * Overwrite the record sequence number. We strictly number them in
 381          * the order received. Since we are actually a reliable transport
 382          * we know that there won't be any re-ordering. We overwrite to deal
 383          * with any packets that have been injected
 384          */
 385         for (rem = thispkt->len, rec = thispkt->data; rem > 0; rem -= len) {
 386             if (rem < DTLS1_RT_HEADER_LENGTH)
 387                 return -1;
 388             epoch = (rec[EPOCH_HI] << 8) | rec[EPOCH_LO];
 389             if (epoch != ctx->epoch) {
 390                 ctx->epoch = epoch;
 391                 ctx->currrec = 0;
 392             }
 393             seq = ctx->currrec;
 394             offset = 0;
 395             do {
 396                 rec[RECORD_SEQUENCE - offset] = seq & 0xFF;
 397                 seq >>= 8;
 398                 offset++;
 399             } while (seq > 0);
 400
 401             len = ((rec[RECORD_LEN_HI] << 8) | rec[RECORD_LEN_LO])
 402                   + DTLS1_RT_HEADER_LENGTH;
 403             if (rem < (int)len)
 404                 return -1;
 405             if (ctx->droprec == (int)ctx->currrec && ctx->dropepoch == epoch) {
 406                 if (rem > (int)len)
 407                     memmove(rec, rec + len, rem - len);
 408                 outl -= len;
 409                 ctx->droprec = -1;
 410                 if (outl == 0)
 411                     BIO_set_retry_read(bio);
 412             } else {
 413                 rec += len;
 414             }
 415
 416             ctx->currrec++;
 417         }
 418     }
 419
 420     memcpy(out, thispkt->data, outl);
 421     mempacket_free(thispkt);
 422     return outl;
 423 }
 424
 425 int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
 426                           int type)
 427 {
 428     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 429     MEMPACKET *thispkt, *looppkt, *nextpkt;
 430     int i;
 431
 432     if (ctx == NULL)
 433         return -1;
 434
 435     /* We only allow injection before we've started writing any data */
 436     if (pktnum >= 0) {
 437         if (ctx->noinject)
 438             return -1;
 439         ctx->injected  = 1;
 440     } else {
 441         ctx->noinject = 1;
 442     }
 443
 444     if (!TEST_ptr(thispkt = OPENSSL_malloc(sizeof(*thispkt))))
 445         return -1;
 446     if (!TEST_ptr(thispkt->data = OPENSSL_malloc(inl))) {
 447         mempacket_free(thispkt);
 448         return -1;
 449     }
 450
 451     memcpy(thispkt->data, in, inl);
 452     thispkt->len = inl;
 453     thispkt->num = (pktnum >= 0) ? (unsigned int)pktnum : ctx->lastpkt;
 454     thispkt->type = type;
 455
 456     for(i = 0; (looppkt = sk_MEMPACKET_value(ctx->pkts, i)) != NULL; i++) {
 457         /* Check if we found the right place to insert this packet */
 458         if (looppkt->num > thispkt->num) {
 459             if (sk_MEMPACKET_insert(ctx->pkts, thispkt, i) == 0) {
 460                 mempacket_free(thispkt);
 461                 return -1;
 462             }
 463             /* If we're doing up front injection then we're done */
 464             if (pktnum >= 0)
 465                 return inl;
 466             /*
 467              * We need to do some accounting on lastpkt. We increment it first,
 468              * but it might now equal the value of injected packets, so we need
 469              * to skip over those
 470              */
 471             ctx->lastpkt++;
 472             do {
 473                 i++;
 474                 nextpkt = sk_MEMPACKET_value(ctx->pkts, i);
 475                 if (nextpkt != NULL && nextpkt->num == ctx->lastpkt)
 476                     ctx->lastpkt++;
 477                 else
 478                     return inl;
 479             } while(1);
 480         } else if (looppkt->num == thispkt->num) {
 481             if (!ctx->noinject) {
 482                 /* We injected two packets with the same packet number! */
 483                 return -1;
 484             }
 485             ctx->lastpkt++;
 486             thispkt->num++;
 487         }
 488     }
 489     /*
 490      * We didn't find any packets with a packet number equal to or greater than
 491      * this one, so we just add it onto the end
 492      */
 493     if (!sk_MEMPACKET_push(ctx->pkts, thispkt)) {
 494         mempacket_free(thispkt);
 495         return -1;
 496     }
 497
 498     if (pktnum < 0)
 499         ctx->lastpkt++;
 500
 501     return inl;
 502 }
 503
 504 static int mempacket_test_write(BIO *bio, const char *in, int inl)
 505 {
 506     return mempacket_test_inject(bio, in, inl, -1, STANDARD_PACKET);
 507 }
 508
 509 static long mempacket_test_ctrl(BIO *bio, int cmd, long num, void *ptr)
 510 {
 511     long ret = 1;
 512     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
 513     MEMPACKET *thispkt;
 514
 515     switch (cmd) {
 516     case BIO_CTRL_EOF:
 517         ret = (long)(sk_MEMPACKET_num(ctx->pkts) == 0);
 518         break;
 519     case BIO_CTRL_GET_CLOSE:
 520         ret = BIO_get_shutdown(bio);
 521         break;
 522     case BIO_CTRL_SET_CLOSE:
 523         BIO_set_shutdown(bio, (int)num);
 524         break;
 525     case BIO_CTRL_WPENDING:
 526         ret = 0L;
 527         break;
 528     case BIO_CTRL_PENDING:
 529         thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
 530         if (thispkt == NULL)
 531             ret = 0;
 532         else
 533             ret = thispkt->len;
 534         break;
 535     case BIO_CTRL_FLUSH:
 536         ret = 1;
 537         break;
 538     case MEMPACKET_CTRL_SET_DROP_EPOCH:
 539         ctx->dropepoch = (unsigned int)num;
 540         break;
 541     case MEMPACKET_CTRL_SET_DROP_REC:
 542         ctx->droprec = (int)num;
 543         break;
 544     case MEMPACKET_CTRL_GET_DROP_REC:
 545         ret = ctx->droprec;
 546         break;
 547     case BIO_CTRL_RESET:
 548     case BIO_CTRL_DUP:
 549     case BIO_CTRL_PUSH:
 550     case BIO_CTRL_POP:
 551     default:
 552         ret = 0;
 553         break;
 554     }
 555     return ret;
 556 }
 557
 558 static int mempacket_test_gets(BIO *bio, char *buf, int size)
 559 {
 560     /* We don't support this - not needed anyway */
 561     return -1;
 562 }
 563
 564 static int mempacket_test_puts(BIO *bio, const char *str)
 565 {
 566     return mempacket_test_write(bio, str, strlen(str));
 567 }
 568
 569 int create_ssl_ctx_pair(const SSL_METHOD *sm, const SSL_METHOD *cm,
 570                         int min_proto_version, int max_proto_version,
 571                         SSL_CTX **sctx, SSL_CTX **cctx, char *certfile,
 572                         char *privkeyfile)
 573 {
 574     SSL_CTX *serverctx = NULL;
 575     SSL_CTX *clientctx = NULL;
 576
 577     if (!TEST_ptr(serverctx = SSL_CTX_new(sm))
 578             || (cctx != NULL && !TEST_ptr(clientctx = SSL_CTX_new(cm))))
 579         goto err;
 580
 581     if ((min_proto_version > 0
 582          && !TEST_true(SSL_CTX_set_min_proto_version(serverctx,
 583                                                      min_proto_version)))
 584         || (max_proto_version > 0
 585             && !TEST_true(SSL_CTX_set_max_proto_version(serverctx,
 586                                                         max_proto_version))))
 587         goto err;
 588     if (clientctx != NULL
 589         && ((min_proto_version > 0
 590              && !TEST_true(SSL_CTX_set_min_proto_version(clientctx,
 591                                                          min_proto_version)))
 592             || (max_proto_version > 0
 593                 && !TEST_true(SSL_CTX_set_max_proto_version(clientctx,
 594                                                             max_proto_version)))))
 595         goto err;
 596
 597     if (certfile != NULL && privkeyfile != NULL) {
 598         if (!TEST_int_eq(SSL_CTX_use_certificate_file(serverctx, certfile,
 599                                                       SSL_FILETYPE_PEM), 1)
 600                 || !TEST_int_eq(SSL_CTX_use_PrivateKey_file(serverctx,
 601                                                             privkeyfile,
 602                                                             SSL_FILETYPE_PEM), 1)
 603                 || !TEST_int_eq(SSL_CTX_check_private_key(serverctx), 1))
 604             goto err;
 605     }
 606
 607 #ifndef OPENSSL_NO_DH
 608     SSL_CTX_set_dh_auto(serverctx, 1);
 609 #endif
 610
 611     *sctx = serverctx;
 612     if (cctx != NULL)
 613         *cctx = clientctx;
 614     return 1;
 615
 616  err:
 617     SSL_CTX_free(serverctx);
 618     SSL_CTX_free(clientctx);
 619     return 0;
 620 }
 621
 622 #define MAXLOOPS    1000000
 623
 624 /*
 625  * NOTE: Transfers control of the BIOs - this function will free them on error
 626  */
 627 int create_ssl_objects(SSL_CTX *serverctx, SSL_CTX *clientctx, SSL **sssl,
 628                           SSL **cssl, BIO *s_to_c_fbio, BIO *c_to_s_fbio)
 629 {
 630     SSL *serverssl = NULL, *clientssl = NULL;
 631     BIO *s_to_c_bio = NULL, *c_to_s_bio = NULL;
 632
 633     if (*sssl != NULL)
 634         serverssl = *sssl;
 635     else if (!TEST_ptr(serverssl = SSL_new(serverctx)))
 636         goto error;
 637     if (*cssl != NULL)
 638         clientssl = *cssl;
 639     else if (!TEST_ptr(clientssl = SSL_new(clientctx)))
 640         goto error;
 641
 642     if (SSL_is_dtls(clientssl)) {
 643         if (!TEST_ptr(s_to_c_bio = BIO_new(bio_s_mempacket_test()))
 644                 || !TEST_ptr(c_to_s_bio = BIO_new(bio_s_mempacket_test())))
 645             goto error;
 646     } else {
 647         if (!TEST_ptr(s_to_c_bio = BIO_new(BIO_s_mem()))
 648                 || !TEST_ptr(c_to_s_bio = BIO_new(BIO_s_mem())))
 649             goto error;
 650     }
 651
 652     if (s_to_c_fbio != NULL
 653             && !TEST_ptr(s_to_c_bio = BIO_push(s_to_c_fbio, s_to_c_bio)))
 654         goto error;
 655     if (c_to_s_fbio != NULL
 656             && !TEST_ptr(c_to_s_bio = BIO_push(c_to_s_fbio, c_to_s_bio)))
 657         goto error;
 658
 659     /* Set Non-blocking IO behaviour */
 660     BIO_set_mem_eof_return(s_to_c_bio, -1);
 661     BIO_set_mem_eof_return(c_to_s_bio, -1);
 662
 663     /* Up ref these as we are passing them to two SSL objects */
 664     SSL_set_bio(serverssl, c_to_s_bio, s_to_c_bio);
 665     BIO_up_ref(s_to_c_bio);
 666     BIO_up_ref(c_to_s_bio);
 667     SSL_set_bio(clientssl, s_to_c_bio, c_to_s_bio);
 668     *sssl = serverssl;
 669     *cssl = clientssl;
 670     return 1;
 671
 672  error:
 673     SSL_free(serverssl);
 674     SSL_free(clientssl);
 675     BIO_free(s_to_c_bio);
 676     BIO_free(c_to_s_bio);
 677     BIO_free(s_to_c_fbio);
 678     BIO_free(c_to_s_fbio);
 679
 680     return 0;
 681 }
 682
 683 int create_ssl_connection(SSL *serverssl, SSL *clientssl, int want)
 684 {
 685     int retc = -1, rets = -1, err, abortctr = 0;
 686     int clienterr = 0, servererr = 0;
 687     unsigned char buf;
 688     size_t readbytes;
 689     int isdtls = SSL_is_dtls(serverssl);
 690
 691     do {
 692         err = SSL_ERROR_WANT_WRITE;
 693         while (!clienterr && retc <= 0 && err == SSL_ERROR_WANT_WRITE) {
 694             retc = SSL_connect(clientssl);
 695             if (retc <= 0)
 696                 err = SSL_get_error(clientssl, retc);
 697         }
 698
 699         if (!clienterr && retc <= 0 && err != SSL_ERROR_WANT_READ) {
 700             TEST_info("SSL_connect() failed %d, %d", retc, err);
 701             clienterr = 1;
 702         }
 703         if (want != SSL_ERROR_NONE && err == want)
 704             return 0;
 705
 706         err = SSL_ERROR_WANT_WRITE;
 707         while (!servererr && rets <= 0 && err == SSL_ERROR_WANT_WRITE) {
 708             rets = SSL_accept(serverssl);
 709             if (rets <= 0)
 710                 err = SSL_get_error(serverssl, rets);
 711         }
 712
 713         if (!servererr && rets <= 0 && err != SSL_ERROR_WANT_READ) {
 714             TEST_info("SSL_accept() failed %d, %d", rets, err);
 715             servererr = 1;
 716         }
 717         if (want != SSL_ERROR_NONE && err == want)
 718             return 0;
 719         if (clienterr && servererr)
 720             return 0;
 721         if (isdtls) {
 722             if (rets > 0 && retc <= 0)
 723                 DTLSv1_handle_timeout(serverssl);
 724             if (retc > 0 && rets <= 0)
 725                 DTLSv1_handle_timeout(clientssl);
 726         }
 727         if (++abortctr == MAXLOOPS) {
 728             TEST_info("No progress made");
 729             return 0;
 730         }
 731         if (isdtls && abortctr <= 50 && (abortctr % 10) == 0) {
 732             /*
 733              * It looks like we're just spinning. Pause for a short period to
 734              * give the DTLS timer a chance to do something. We only do this for
 735              * the first few times to prevent hangs.
 736              */
 737             ossl_sleep(50);
 738         }
 739     } while (retc <=0 || rets <= 0);
 740
 741     /*
 742      * We attempt to read some data on the client side which we expect to fail.
 743      * This will ensure we have received the NewSessionTicket in TLSv1.3 where
 744      * appropriate.
 745      */
 746     if (SSL_read_ex(clientssl, &buf, sizeof(buf), &readbytes) > 0) {
 747         if (!TEST_ulong_eq(readbytes, 0))
 748             return 0;
 749     } else if (!TEST_int_eq(SSL_get_error(clientssl, 0), SSL_ERROR_WANT_READ)) {
 750         return 0;
 751     }
 752
 753     return 1;
 754 }
 755
 756 void shutdown_ssl_connection(SSL *serverssl, SSL *clientssl)
 757 {
 758     SSL_shutdown(clientssl);
 759     SSL_shutdown(serverssl);
 760     SSL_free(serverssl);
 761     SSL_free(clientssl);
 762 }