libmicrohttpd

HTTP/1.x server C library (MHD 1.x, stable)
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test_digestauth_concurrent.c (22553B)


      1 /*
      2      This file is part of libmicrohttpd
      3      Copyright (C) 2010 Christian Grothoff
      4      Copyright (C) 2016-2022 Evgeny Grin (Karlson2k)
      5 
      6      libmicrohttpd is free software; you can redistribute it and/or modify
      7      it under the terms of the GNU General Public License as published
      8      by the Free Software Foundation; either version 2, or (at your
      9      option) any later version.
     10 
     11      libmicrohttpd is distributed in the hope that it will be useful, but
     12      WITHOUT ANY WARRANTY; without even the implied warranty of
     13      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14      General Public License for more details.
     15 
     16      You should have received a copy of the GNU General Public License
     17      along with libmicrohttpd; see the file COPYING.  If not, write to the
     18      Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19      Boston, MA 02110-1301, USA.
     20 */
     21 
     22 /**
     23  * @file test_digestauth_concurrent.c
     24  * @brief  Testcase for libmicrohttpd concurrent Digest Authorisation
     25  * @author Amr Ali
     26  * @author Karlson2k (Evgeny Grin)
     27  */
     28 
     29 #include "mhd_options.h"
     30 #include "platform.h"
     31 #include <curl/curl.h>
     32 #include <microhttpd.h>
     33 #include <stdlib.h>
     34 #include <string.h>
     35 #include <time.h>
     36 #if defined(MHD_HTTPS_REQUIRE_GCRYPT) && \
     37   (defined(MHD_SHA256_TLSLIB) || defined(MHD_MD5_TLSLIB))
     38 #define NEED_GCRYP_INIT 1
     39 #include <gcrypt.h>
     40 #endif /* MHD_HTTPS_REQUIRE_GCRYPT && (MHD_SHA256_TLSLIB || MHD_MD5_TLSLIB) */
     41 #include <errno.h>
     42 
     43 #ifndef WINDOWS
     44 #include <sys/socket.h>
     45 #include <unistd.h>
     46 #else
     47 #include <wincrypt.h>
     48 #endif
     49 
     50 #include <pthread.h>
     51 
     52 #include "mhd_has_param.h"
     53 
     54 /* Turn any MHD_PANIC() or failing mhd_assert() reached from this
     55    test into a marked, classifiable test error (TESTING.md, P5). */
     56 #include "mhd_panic_tripwire.h"
     57 
     58 #ifndef CURL_VERSION_BITS
     59 #define CURL_VERSION_BITS(x,y,z) ((x) << 16 | (y) << 8 | (z))
     60 #endif /* ! CURL_VERSION_BITS */
     61 #ifndef CURL_AT_LEAST_VERSION
     62 #define CURL_AT_LEAST_VERSION(x,y,z) \
     63   (LIBCURL_VERSION_NUM >= CURL_VERSION_BITS (x, y, z))
     64 #endif /* ! CURL_AT_LEAST_VERSION */
     65 
     66 #ifndef _MHD_INSTRMACRO
     67 /* Quoted macro parameter */
     68 #define _MHD_INSTRMACRO(a) #a
     69 #endif /* ! _MHD_INSTRMACRO */
     70 #ifndef _MHD_STRMACRO
     71 /* Quoted expanded macro parameter */
     72 #define _MHD_STRMACRO(a) _MHD_INSTRMACRO (a)
     73 #endif /* ! _MHD_STRMACRO */
     74 
     75 #if defined(HAVE___FUNC__)
     76 #define externalErrorExit(ignore) \
     77   _externalErrorExit_func (NULL, __func__, __LINE__)
     78 #define externalErrorExitDesc(errDesc) \
     79   _externalErrorExit_func (errDesc, __func__, __LINE__)
     80 #define libcurlErrorExit(ignore) \
     81   _libcurlErrorExit_func (NULL, __func__, __LINE__)
     82 #define libcurlErrorExitDesc(errDesc) \
     83   _libcurlErrorExit_func (errDesc, __func__, __LINE__)
     84 #define mhdErrorExit(ignore) \
     85   _mhdErrorExit_func (NULL, __func__, __LINE__)
     86 #define mhdErrorExitDesc(errDesc) \
     87   _mhdErrorExit_func (errDesc, __func__, __LINE__)
     88 #define checkCURLE_OK(libcurlcall) \
     89   _checkCURLE_OK_func ((libcurlcall), _MHD_STRMACRO (libcurlcall), \
     90                        __func__, __LINE__)
     91 #elif defined(HAVE___FUNCTION__)
     92 #define externalErrorExit(ignore) \
     93   _externalErrorExit_func (NULL, __FUNCTION__, __LINE__)
     94 #define externalErrorExitDesc(errDesc) \
     95   _externalErrorExit_func (errDesc, __FUNCTION__, __LINE__)
     96 #define libcurlErrorExit(ignore) \
     97   _libcurlErrorExit_func (NULL, __FUNCTION__, __LINE__)
     98 #define libcurlErrorExitDesc(errDesc) \
     99   _libcurlErrorExit_func (errDesc, __FUNCTION__, __LINE__)
    100 #define mhdErrorExit(ignore) \
    101   _mhdErrorExit_func (NULL, __FUNCTION__, __LINE__)
    102 #define mhdErrorExitDesc(errDesc) \
    103   _mhdErrorExit_func (errDesc, __FUNCTION__, __LINE__)
    104 #define checkCURLE_OK(libcurlcall) \
    105   _checkCURLE_OK_func ((libcurlcall), _MHD_STRMACRO (libcurlcall), \
    106                        __FUNCTION__, __LINE__)
    107 #else
    108 #define externalErrorExit(ignore) _externalErrorExit_func (NULL, NULL, __LINE__)
    109 #define externalErrorExitDesc(errDesc) \
    110   _externalErrorExit_func (errDesc, NULL, __LINE__)
    111 #define libcurlErrorExit(ignore) _libcurlErrorExit_func (NULL, NULL, __LINE__)
    112 #define libcurlErrorExitDesc(errDesc) \
    113   _libcurlErrorExit_func (errDesc, NULL, __LINE__)
    114 #define mhdErrorExit(ignore) _mhdErrorExit_func (NULL, NULL, __LINE__)
    115 #define mhdErrorExitDesc(errDesc) _mhdErrorExit_func (errDesc, NULL, __LINE__)
    116 #define checkCURLE_OK(libcurlcall) \
    117   _checkCURLE_OK_func ((libcurlcall), _MHD_STRMACRO (libcurlcall), NULL, \
    118                        __LINE__)
    119 #endif
    120 
    121 
    122 _MHD_NORETURN static void
    123 _externalErrorExit_func (const char *errDesc, const char *funcName, int lineNum)
    124 {
    125   fflush (stdout);
    126   if ((NULL != errDesc) && (0 != errDesc[0]))
    127     fprintf (stderr, "%s", errDesc);
    128   else
    129     fprintf (stderr, "System or external library call failed");
    130   if ((NULL != funcName) && (0 != funcName[0]))
    131     fprintf (stderr, " in %s", funcName);
    132   if (0 < lineNum)
    133     fprintf (stderr, " at line %d", lineNum);
    134 
    135   fprintf (stderr, ".\nLast errno value: %d (%s)\n", (int) errno,
    136            strerror (errno));
    137 #ifdef MHD_WINSOCK_SOCKETS
    138   fprintf (stderr, "WSAGetLastError() value: %d\n", (int) WSAGetLastError ());
    139 #endif /* MHD_WINSOCK_SOCKETS */
    140   fflush (stderr);
    141   exit (99);
    142 }
    143 
    144 
    145 /* Not actually used in this test */
    146 static char libcurl_errbuf[CURL_ERROR_SIZE] = "";
    147 
    148 _MHD_NORETURN static void
    149 _libcurlErrorExit_func (const char *errDesc, const char *funcName, int lineNum)
    150 {
    151   fflush (stdout);
    152   if ((NULL != errDesc) && (0 != errDesc[0]))
    153     fprintf (stderr, "%s", errDesc);
    154   else
    155     fprintf (stderr, "CURL library call failed");
    156   if ((NULL != funcName) && (0 != funcName[0]))
    157     fprintf (stderr, " in %s", funcName);
    158   if (0 < lineNum)
    159     fprintf (stderr, " at line %d", lineNum);
    160 
    161   fprintf (stderr, ".\nLast errno value: %d (%s)\n", (int) errno,
    162            strerror (errno));
    163 #ifdef MHD_WINSOCK_SOCKETS
    164   fprintf (stderr, "WSAGetLastError() value: %d\n", (int) WSAGetLastError ());
    165 #endif /* MHD_WINSOCK_SOCKETS */
    166   if (0 != libcurl_errbuf[0])
    167     fprintf (stderr, "Last libcurl error description: %s\n", libcurl_errbuf);
    168 
    169   fflush (stderr);
    170   exit (99);
    171 }
    172 
    173 
    174 _MHD_NORETURN static void
    175 _mhdErrorExit_func (const char *errDesc, const char *funcName, int lineNum)
    176 {
    177   fflush (stdout);
    178   if ((NULL != errDesc) && (0 != errDesc[0]))
    179     fprintf (stderr, "%s", errDesc);
    180   else
    181     fprintf (stderr, "MHD unexpected error");
    182   if ((NULL != funcName) && (0 != funcName[0]))
    183     fprintf (stderr, " in %s", funcName);
    184   if (0 < lineNum)
    185     fprintf (stderr, " at line %d", lineNum);
    186 
    187   fprintf (stderr, ".\nLast errno value: %d (%s)\n", (int) errno,
    188            strerror (errno));
    189 #ifdef MHD_WINSOCK_SOCKETS
    190   fprintf (stderr, "WSAGetLastError() value: %d\n", (int) WSAGetLastError ());
    191 #endif /* MHD_WINSOCK_SOCKETS */
    192 
    193   fflush (stderr);
    194   exit (8);
    195 }
    196 
    197 
    198 #if 0
    199 /* Function unused in this test */
    200 static void
    201 _checkCURLE_OK_func (CURLcode code, const char *curlFunc,
    202                      const char *funcName, int lineNum)
    203 {
    204   if (CURLE_OK == code)
    205     return;
    206 
    207   fflush (stdout);
    208   if ((NULL != curlFunc) && (0 != curlFunc[0]))
    209     fprintf (stderr, "'%s' resulted in '%s'", curlFunc,
    210              curl_easy_strerror (code));
    211   else
    212     fprintf (stderr, "libcurl function call resulted in '%s'",
    213              curl_easy_strerror (code));
    214   if ((NULL != funcName) && (0 != funcName[0]))
    215     fprintf (stderr, " in %s", funcName);
    216   if (0 < lineNum)
    217     fprintf (stderr, " at line %d", lineNum);
    218 
    219   fprintf (stderr, ".\nLast errno value: %d (%s)\n", (int) errno,
    220            strerror (errno));
    221   if (0 != libcurl_errbuf[0])
    222     fprintf (stderr, "Last libcurl error description: %s\n", libcurl_errbuf);
    223 
    224   fflush (stderr);
    225   exit (9);
    226 }
    227 
    228 
    229 #endif
    230 
    231 
    232 /* Could be increased to facilitate debugging */
    233 #define TIMEOUTS_VAL 5
    234 
    235 #define MHD_URI_BASE_PATH "/bar%20foo?key=value"
    236 
    237 #define PAGE \
    238   "<html><head><title>libmicrohttpd demo</title></head><body>Access granted</body></html>"
    239 
    240 #define DENIED \
    241   "<html><head><title>libmicrohttpd demo</title></head><body>Access denied</body></html>"
    242 
    243 #define MY_OPAQUE "11733b200778ce33060f31c9af70a870ba96ddd4"
    244 
    245 struct CBC
    246 {
    247   char *buf;
    248   size_t pos;
    249   size_t size;
    250 };
    251 
    252 static int verbose;
    253 
    254 static size_t
    255 copyBuffer (void *ptr,
    256             size_t size,
    257             size_t nmemb,
    258             void *ctx)
    259 {
    260   struct CBC *cbc = ctx;
    261 
    262   if (cbc->pos + size * nmemb > cbc->size)
    263     mhdErrorExitDesc ("Wrong too large data");       /* overflow */
    264   memcpy (&cbc->buf[cbc->pos], ptr, size * nmemb);
    265   cbc->pos += size * nmemb;
    266   return size * nmemb;
    267 }
    268 
    269 
    270 static enum MHD_Result
    271 ahc_echo (void *cls,
    272           struct MHD_Connection *connection,
    273           const char *url,
    274           const char *method,
    275           const char *version,
    276           const char *upload_data,
    277           size_t *upload_data_size,
    278           void **req_cls)
    279 {
    280   struct MHD_Response *response;
    281   char *username;
    282   const char *password = "testpass";
    283   const char *realm = "test@example.com";
    284   enum MHD_Result ret;
    285   enum MHD_DigestAuthResult ret_e;
    286   static int already_called_marker;
    287   (void) cls; (void) url;                         /* Unused. Silent compiler warning. */
    288   (void) method; (void) version; (void) upload_data; /* Unused. Silent compiler warning. */
    289   (void) upload_data_size; (void) req_cls;        /* Unused. Silent compiler warning. */
    290 
    291   if (&already_called_marker != *req_cls)
    292   { /* Called for the first time, request not fully read yet */
    293     *req_cls = &already_called_marker;
    294     /* Wait for complete request */
    295     return MHD_YES;
    296   }
    297 
    298   username = MHD_digest_auth_get_username (connection);
    299   if ( (username == NULL) ||
    300        (0 != strcmp (username, "testuser")) )
    301   {
    302     response = MHD_create_response_from_buffer_static (strlen (DENIED),
    303                                                        DENIED);
    304     if (NULL == response)
    305       mhdErrorExitDesc ("MHD_create_response_from_buffer failed");
    306     ret = MHD_queue_auth_fail_response2 (connection,
    307                                          realm,
    308                                          MY_OPAQUE,
    309                                          response,
    310                                          MHD_NO,
    311                                          MHD_DIGEST_ALG_MD5);
    312     if (MHD_YES != ret)
    313       mhdErrorExitDesc ("MHD_queue_auth_fail_response2 failed");
    314     MHD_destroy_response (response);
    315     return ret;
    316   }
    317   ret_e = MHD_digest_auth_check3 (connection,
    318                                   realm,
    319                                   username,
    320                                   password,
    321                                   50 * TIMEOUTS_VAL,
    322                                   0, MHD_DIGEST_AUTH_MULT_QOP_AUTH,
    323                                   MHD_DIGEST_AUTH_MULT_ALGO3_MD5);
    324   MHD_free (username);
    325   if (ret_e != MHD_DAUTH_OK)
    326   {
    327     response = MHD_create_response_from_buffer_static (strlen (DENIED),
    328                                                        DENIED);
    329     if (NULL == response)
    330       mhdErrorExitDesc ("MHD_create_response_from_buffer() failed");
    331     ret = MHD_queue_auth_fail_response2 (connection,
    332                                          realm,
    333                                          MY_OPAQUE,
    334                                          response,
    335                                          (MHD_DAUTH_NONCE_STALE == ret_e) ?
    336                                          MHD_YES : MHD_NO,
    337                                          MHD_DIGEST_ALG_MD5);
    338     if (MHD_YES != ret)
    339       mhdErrorExitDesc ("MHD_queue_auth_fail_response2() failed");
    340     MHD_destroy_response (response);
    341     return ret;
    342   }
    343   response = MHD_create_response_from_buffer_static (strlen (PAGE),
    344                                                      PAGE);
    345   if (NULL == response)
    346     mhdErrorExitDesc ("MHD_create_response_from_buffer() failed");
    347   ret = MHD_queue_response (connection,
    348                             MHD_HTTP_OK,
    349                             response);
    350   if (MHD_YES != ret)
    351     mhdErrorExitDesc ("MHD_queue_auth_fail_response2() failed");
    352   MHD_destroy_response (response);
    353   return ret;
    354 }
    355 
    356 
    357 static CURL *
    358 setupCURL (void *cbc, uint16_t port, char *errbuf)
    359 {
    360   CURL *c;
    361   char url[512];
    362 
    363   if (1)
    364   {
    365     int res;
    366     /* A workaround for some old libcurl versions, which ignore the specified
    367      * port by CURLOPT_PORT when digest authorisation is used. */
    368     res = snprintf (url, (sizeof(url) / sizeof(url[0])),
    369                     "http://127.0.0.1:%u%s", (unsigned int) port,
    370                     MHD_URI_BASE_PATH);
    371     if ((0 >= res) || ((sizeof(url) / sizeof(url[0])) <= (size_t) res))
    372       externalErrorExitDesc ("Cannot form request URL");
    373   }
    374 
    375   c = curl_easy_init ();
    376   if (NULL == c)
    377     libcurlErrorExitDesc ("curl_easy_init() failed");
    378 
    379   if ((CURLE_OK != curl_easy_setopt (c, CURLOPT_NOSIGNAL, 1L)) ||
    380       (CURLE_OK != curl_easy_setopt (c, CURLOPT_ERRORBUFFER,
    381                                      errbuf)) ||
    382       (CURLE_OK != curl_easy_setopt (c, CURLOPT_WRITEFUNCTION,
    383                                      &copyBuffer)) ||
    384       (CURLE_OK != curl_easy_setopt (c, CURLOPT_WRITEDATA, cbc)) ||
    385       (CURLE_OK != curl_easy_setopt (c, CURLOPT_CONNECTTIMEOUT,
    386                                      ((long) TIMEOUTS_VAL))) ||
    387       (CURLE_OK != curl_easy_setopt (c, CURLOPT_TIMEOUT,
    388                                      ((long) TIMEOUTS_VAL))) ||
    389       (CURLE_OK != curl_easy_setopt (c, CURLOPT_HTTP_VERSION,
    390                                      CURL_HTTP_VERSION_1_1)) ||
    391       (CURLE_OK != curl_easy_setopt (c, CURLOPT_FAILONERROR, 1L)) ||
    392 #ifdef _DEBUG
    393       (CURLE_OK != curl_easy_setopt (c, CURLOPT_VERBOSE, 1L)) ||
    394 #endif /* _DEBUG */
    395 #if CURL_AT_LEAST_VERSION (7, 85, 0)
    396       (CURLE_OK != curl_easy_setopt (c, CURLOPT_PROTOCOLS_STR, "http")) ||
    397 #elif CURL_AT_LEAST_VERSION (7, 19, 4)
    398       (CURLE_OK != curl_easy_setopt (c, CURLOPT_PROTOCOLS, CURLPROTO_HTTP)) ||
    399 #endif /* CURL_AT_LEAST_VERSION (7, 19, 4) */
    400 #if CURL_AT_LEAST_VERSION (7, 45, 0)
    401       (CURLE_OK != curl_easy_setopt (c, CURLOPT_DEFAULT_PROTOCOL, "http")) ||
    402 #endif /* CURL_AT_LEAST_VERSION (7, 45, 0) */
    403       (CURLE_OK != curl_easy_setopt (c, CURLOPT_PORT, ((long) port))) ||
    404       (CURLE_OK != curl_easy_setopt (c, CURLOPT_URL, url)))
    405     libcurlErrorExitDesc ("curl_easy_setopt() failed");
    406   if ((CURLE_OK != curl_easy_setopt (c, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST)) ||
    407       (CURLE_OK != curl_easy_setopt (c, CURLOPT_USERPWD,
    408                                      "testuser:testpass")))
    409     libcurlErrorExitDesc ("curl_easy_setopt() authorization options failed");
    410   return c;
    411 }
    412 
    413 
    414 static void
    415 getRnd (void *buf, size_t size)
    416 {
    417 #ifndef WINDOWS
    418   int fd;
    419   size_t off = 0;
    420 
    421   fd = open ("/dev/urandom",
    422              O_RDONLY);
    423   if (-1 == fd)
    424     externalErrorExitDesc ("Failed to open '/dev/urandom'");
    425 
    426   do
    427   {
    428     ssize_t res;
    429     res = read (fd, ((uint8_t *) buf) + off, size - off);
    430     if (0 > res)
    431       externalErrorExitDesc ("Failed to read '/dev/urandom'");
    432     off += (size_t) res;
    433   } while (off < size);
    434   (void) close (fd);
    435 #else
    436   HCRYPTPROV cc;
    437   BOOL b;
    438 
    439   b = CryptAcquireContext (&cc,
    440                            NULL,
    441                            NULL,
    442                            PROV_RSA_FULL,
    443                            CRYPT_VERIFYCONTEXT | CRYPT_SILENT);
    444   if (b == 0)
    445     externalErrorExitDesc ("CryptAcquireContext() failed");
    446   b = CryptGenRandom (cc, (DWORD) size, (BYTE *) buf);
    447   if (b == 0)
    448     externalErrorExitDesc ("CryptGenRandom() failed");
    449   CryptReleaseContext (cc, 0);
    450 #endif /* ! WINDOWS */
    451 }
    452 
    453 
    454 struct curlWokerInfo
    455 {
    456   int workerNumber;
    457   struct CBC cbc;
    458   pthread_t tid;
    459   /**
    460    * The libcurl handle to run in thread
    461    */
    462   CURL *c;
    463   char *libcurl_errbuf;
    464   /**
    465    * Non-zero if worker is finished
    466    */
    467   volatile int finished;
    468   /**
    469    * The number of successful worker results
    470    */
    471   volatile unsigned int success;
    472 };
    473 
    474 
    475 static void *
    476 worker_func (void *param)
    477 {
    478   struct curlWokerInfo *const w = (struct curlWokerInfo *) param;
    479   CURLcode req_result;
    480   if (NULL == w)
    481     externalErrorExit ();
    482 
    483   req_result = curl_easy_perform (w->c);
    484   if (CURLE_OK != req_result)
    485   {
    486     if (0 != w->libcurl_errbuf[0])
    487       fprintf (stderr, "Worker %d: first request failed. "
    488                "libcurl error: '%s'.\n"
    489                "libcurl error description: '%s'.\n",
    490                w->workerNumber, curl_easy_strerror (req_result),
    491                w->libcurl_errbuf);
    492     else
    493       fprintf (stderr, "Worker %d: first request failed. "
    494                "libcurl error: '%s'.\n",
    495                w->workerNumber, curl_easy_strerror (req_result));
    496   }
    497   else
    498   {
    499     if (w->cbc.pos != strlen (PAGE))
    500     {
    501       fprintf (stderr, "Worker %d: Got %u bytes ('%.*s'), expected %u bytes. ",
    502                w->workerNumber,
    503                (unsigned) w->cbc.pos, (int) w->cbc.pos, w->cbc.buf,
    504                (unsigned) strlen (MHD_URI_BASE_PATH));
    505       mhdErrorExitDesc ("Wrong returned data length");
    506     }
    507     if (0 != strncmp (PAGE, w->cbc.buf, strlen (PAGE)))
    508     {
    509       fprintf (stderr, "Worker %d: Got invalid response '%.*s'. ",
    510                w->workerNumber,
    511                (int) w->cbc.pos, w->cbc.buf);
    512       mhdErrorExitDesc ("Wrong returned data");
    513     }
    514     if (verbose)
    515       printf ("Worker %d: first request successful.\n", w->workerNumber);
    516     w->success++;
    517   }
    518 #ifdef _DEBUG
    519   fflush (stderr);
    520   fflush (stdout);
    521 #endif /* _DEBUG */
    522 
    523   /* Second request */
    524   w->cbc.pos = 0;
    525   req_result = curl_easy_perform (w->c);
    526   if (CURLE_OK != req_result)
    527   {
    528     if (0 != w->libcurl_errbuf[0])
    529       fprintf (stderr, "Worker %d: second request failed. "
    530                "libcurl error: '%s'.\n"
    531                "libcurl error description: '%s'.\n",
    532                w->workerNumber, curl_easy_strerror (req_result),
    533                w->libcurl_errbuf);
    534     else
    535       fprintf (stderr, "Worker %d: second request failed. "
    536                "libcurl error: '%s'.\n",
    537                w->workerNumber, curl_easy_strerror (req_result));
    538   }
    539   else
    540   {
    541     if (w->cbc.pos != strlen (PAGE))
    542     {
    543       fprintf (stderr, "Worker %d: Got %u bytes ('%.*s'), expected %u bytes. ",
    544                w->workerNumber,
    545                (unsigned) w->cbc.pos, (int) w->cbc.pos, w->cbc.buf,
    546                (unsigned) strlen (MHD_URI_BASE_PATH));
    547       mhdErrorExitDesc ("Wrong returned data length");
    548     }
    549     if (0 != strncmp (PAGE, w->cbc.buf, strlen (PAGE)))
    550     {
    551       fprintf (stderr, "Worker %d: Got invalid response '%.*s'. ",
    552                w->workerNumber,
    553                (int) w->cbc.pos, w->cbc.buf);
    554       mhdErrorExitDesc ("Wrong returned data");
    555     }
    556     if (verbose)
    557       printf ("Worker %d: second request successful.\n", w->workerNumber);
    558     w->success++;
    559   }
    560 #ifdef _DEBUG
    561   fflush (stderr);
    562   fflush (stdout);
    563 #endif /* _DEBUG */
    564 
    565   w->finished = ! 0;
    566   return NULL;
    567 }
    568 
    569 
    570 #define CLIENT_BUF_SIZE 2048
    571 
    572 static unsigned int
    573 testDigestAuth (void)
    574 {
    575   struct MHD_Daemon *d;
    576   char rnd[8];
    577   uint16_t port;
    578   size_t i;
    579   /* Run three workers in parallel so at least two workers would start within
    580    * the same monotonic clock second.*/
    581   struct curlWokerInfo workers[3];
    582   unsigned int ret;
    583 
    584   if (MHD_NO != MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT))
    585     port = 0;
    586   else
    587     port = 4200;
    588 
    589   getRnd (rnd, sizeof(rnd));
    590 
    591   d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG,
    592                         port, NULL, NULL,
    593                         &ahc_echo, NULL,
    594                         MHD_OPTION_DIGEST_AUTH_RANDOM, sizeof (rnd), rnd,
    595                         MHD_OPTION_NONCE_NC_SIZE, 300,
    596                         MHD_OPTION_THREAD_POOL_SIZE,
    597                         (unsigned int) (sizeof(workers) / sizeof(workers[0])),
    598                         MHD_OPTION_DIGEST_AUTH_DEFAULT_MAX_NC, (uint32_t) 999,
    599                         MHD_OPTION_END);
    600   if (d == NULL)
    601     return 1;
    602   if (0 == port)
    603   {
    604     const union MHD_DaemonInfo *dinfo;
    605 
    606     dinfo = MHD_get_daemon_info (d,
    607                                  MHD_DAEMON_INFO_BIND_PORT);
    608     if ( (NULL == dinfo) ||
    609          (0 == dinfo->port) )
    610       mhdErrorExitDesc ("MHD_get_daemon_info() failed");
    611     port = dinfo->port;
    612   }
    613 
    614   /* Initialise all workers */
    615   for (i = 0; i < sizeof(workers) / sizeof(workers[0]); i++)
    616   {
    617     struct curlWokerInfo *const w = workers + i;
    618     w->workerNumber = (int) i + 1; /* Use 1-based numbering */
    619     w->cbc.buf = malloc (CLIENT_BUF_SIZE);
    620     if (NULL == w->cbc.buf)
    621       externalErrorExitDesc ("malloc() failed");
    622     w->cbc.size = CLIENT_BUF_SIZE;
    623     w->cbc.pos = 0;
    624     w->libcurl_errbuf = malloc (CURL_ERROR_SIZE);
    625     if (NULL == w->libcurl_errbuf)
    626       externalErrorExitDesc ("malloc() failed");
    627     w->libcurl_errbuf[0] = 0;
    628     w->c = setupCURL (&w->cbc, port, w->libcurl_errbuf);
    629     w->finished = 0;
    630     w->success = 0;
    631   }
    632 
    633   /* Fire already initialised workers */
    634   for (i = 0; i < sizeof(workers) / sizeof(workers[0]); i++)
    635   {
    636     struct curlWokerInfo *const w = workers + i;
    637     if (0 != pthread_create (&w->tid, NULL, &worker_func, w))
    638       externalErrorExitDesc ("pthread_create() failed");
    639   }
    640 
    641   /* Collect results, cleanup workers */
    642   ret = 0;
    643   for (i = 0; i < sizeof(workers) / sizeof(workers[0]); i++)
    644   {
    645     struct curlWokerInfo *const w = workers + i;
    646     if (0 != pthread_join (w->tid, NULL))
    647       externalErrorExitDesc ("pthread_join() failed");
    648     curl_easy_cleanup (w->c);
    649     free (w->libcurl_errbuf);
    650     free (w->cbc.buf);
    651     if (! w->finished)
    652       externalErrorExitDesc ("The worker thread did't signal 'finished' state");
    653     ret += 2 - w->success;
    654   }
    655 
    656   MHD_stop_daemon (d);
    657   return ret;
    658 }
    659 
    660 
    661 int
    662 main (int argc, char *const *argv)
    663 {
    664   unsigned int errorCount = 0;
    665   (void) argc; (void) argv; /* Unused. Silent compiler warning. */
    666 #if (LIBCURL_VERSION_MAJOR == 7) && (LIBCURL_VERSION_MINOR == 62)
    667   if (1)
    668   {
    669     fprintf (stderr, "libcurl version 7.62.x has bug in processing "
    670              "URI with GET arguments for Digest Auth.\n");
    671     fprintf (stderr, "This test cannot be performed.\n");
    672     exit (77);
    673   }
    674 #endif /* libcurl version 7.62.x */
    675 
    676   verbose = ! (has_param (argc, argv, "-q") ||
    677                has_param (argc, argv, "--quiet") ||
    678                has_param (argc, argv, "-s") ||
    679                has_param (argc, argv, "--silent"));
    680 
    681 #ifdef NEED_GCRYP_INIT
    682   gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0);
    683 #ifdef GCRYCTL_INITIALIZATION_FINISHED
    684   gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
    685 #endif /* GCRYCTL_INITIALIZATION_FINISHED */
    686 #endif /* NEED_GCRYP_INIT */
    687   if (0 != curl_global_init (CURL_GLOBAL_WIN32))
    688     return 2;
    689   errorCount += testDigestAuth ();
    690   if (errorCount != 0)
    691     fprintf (stderr, "Error (code: %u)\n", errorCount);
    692   curl_global_cleanup ();
    693   return (0 == errorCount) ? 0 : 1;       /* 0 == pass */
    694 }