cups/tls-gnutls.c

   1 /*
   2  * "$Id$"
   3  *
   4  * TLS support code for CUPS using GNU TLS.
   5  *
   6  * Copyright 2007-2015 by Apple Inc.
   7  * Copyright 1997-2007 by Easy Software Products, all rights reserved.
   8  *
   9  * These coded instructions, statements, and computer programs are the
  10  * property of Apple Inc. and are protected by Federal copyright
  11  * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  * which should have been included with this file.  If this file is
  13  * file is missing or damaged, see the license at "http://www.cups.org/".
  14  *
  15  * This file is subject to the Apple OS-Developed Software exception.
  16  */
  17
  18 /**** This file is included from tls.c ****/
  19
  20 /*
  21  * Include necessary headers...
  22  */
  23
  24 #include <sys/stat.h>
  25
  26
  27 /*
  28  * Local globals...
  29  */
  30
  31 static int              tls_auto_create = 0;
  32                                         /* Auto-create self-signed certs? */
  33 static char             *tls_common_name = NULL;
  34                                         /* Default common name */
  35 static char             *tls_keypath = NULL;
  36                                         /* Server cert keychain path */
  37 static _cups_mutex_t    tls_mutex = _CUPS_MUTEX_INITIALIZER;
  38                                         /* Mutex for keychain/certs */
  39 static int              tls_options = -1;/* Options for TLS connections */
  40
  41
  42 /*
  43  * Local functions...
  44  */
  45
  46 static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential);
  47 static const char       *http_gnutls_default_path(char *buffer, size_t bufsize);
  48 static const char       *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext);
  49 static ssize_t          http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length);
  50 static ssize_t          http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length);
  51
  52
  53 /*
  54  * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair.
  55  *
  56  * @since CUPS 2.0/OS 10.10@
  57  */
  58
  59 int                                     /* O - 1 on success, 0 on failure */
  60 cupsMakeServerCredentials(
  61     const char *path,                   /* I - Path to keychain/directory */
  62     const char *common_name,            /* I - Common name */
  63     int        num_alt_names,           /* I - Number of subject alternate names */
  64     const char **alt_names,             /* I - Subject Alternate Names */
  65     time_t     expiration_date)         /* I - Expiration date */
  66 {
  67   gnutls_x509_crt_t     crt;            /* Self-signed certificate */
  68   gnutls_x509_privkey_t key;            /* Encryption private key */
  69   char                  temp[1024],     /* Temporary directory name */
  70                         crtfile[1024],  /* Certificate filename */
  71                         keyfile[1024];  /* Private key filename */
  72   cups_lang_t           *language;      /* Default language info */
  73   cups_file_t           *fp;            /* Key/cert file */
  74   unsigned char         buffer[8192];   /* Buffer for x509 data */
  75   size_t                bytes;          /* Number of bytes of data */
  76   unsigned char         serial[4];      /* Serial number buffer */
  77   time_t                curtime;        /* Current time */
  78   int                   result;         /* Result of GNU TLS calls */
  79
  80
  81   DEBUG_printf(("cupsMakeServerCredentials(path=\"%s\", common_name=\"%s\", num_alt_names=%d, alt_names=%p, expiration_date=%d)", path, common_name, num_alt_names, alt_names, (int)expiration_date));
  82
  83  /*
  84   * Filenames...
  85   */
  86
  87   if (!path)
  88     path = http_gnutls_default_path(temp, sizeof(temp));
  89
  90   if (!path || !common_name)
  91   {
  92     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
  93     return (0);
  94   }
  95
  96   http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt");
  97   http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key");
  98
  99  /*
 100   * Create the encryption key...
 101   */
 102
 103   DEBUG_puts("1cupsMakeServerCredentials: Creating key pair.");
 104
 105   gnutls_x509_privkey_init(&key);
 106   gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0);
 107
 108   DEBUG_puts("1cupsMakeServerCredentials: Key pair created.");
 109
 110  /*
 111   * Save it...
 112   */
 113
 114   bytes = sizeof(buffer);
 115
 116   if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0)
 117   {
 118     DEBUG_printf(("1cupsMakeServerCredentials: Unable to export private key: %s", gnutls_strerror(result)));
 119     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0);
 120     gnutls_x509_privkey_deinit(key);
 121     return (0);
 122   }
 123   else if ((fp = cupsFileOpen(keyfile, "w")) != NULL)
 124   {
 125     DEBUG_printf(("1cupsMakeServerCredentials: Writing private key to \"%s\".", keyfile));
 126     cupsFileWrite(fp, (char *)buffer, bytes);
 127     cupsFileClose(fp);
 128   }
 129   else
 130   {
 131     DEBUG_printf(("1cupsMakeServerCredentials: Unable to create private key file \"%s\": %s", keyfile, strerror(errno)));
 132     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
 133     gnutls_x509_privkey_deinit(key);
 134     return (0);
 135   }
 136
 137  /*
 138   * Create the self-signed certificate...
 139   */
 140
 141   DEBUG_puts("1cupsMakeServerCredentials: Generating self-signed X.509 certificate.");
 142
 143   language  = cupsLangDefault();
 144   curtime   = time(NULL);
 145   serial[0] = curtime >> 24;
 146   serial[1] = curtime >> 16;
 147   serial[2] = curtime >> 8;
 148   serial[3] = curtime;
 149
 150   gnutls_x509_crt_init(&crt);
 151   if (strlen(language->language) == 5)
 152     gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
 153                                   language->language + 3, 2);
 154   else
 155     gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
 156                                   "US", 2);
 157   gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0,
 158                                 common_name, strlen(common_name));
 159   gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0,
 160                                 common_name, strlen(common_name));
 161   gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME,
 162                                 0, "Unknown", 7);
 163   gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0,
 164                                 "Unknown", 7);
 165   gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0,
 166                                 "Unknown", 7);
 167 /*  gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0,
 168                                 ServerAdmin, strlen(ServerAdmin));*/
 169   gnutls_x509_crt_set_key(crt, key);
 170   gnutls_x509_crt_set_serial(crt, serial, sizeof(serial));
 171   gnutls_x509_crt_set_activation_time(crt, curtime);
 172   gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400);
 173   gnutls_x509_crt_set_ca_status(crt, 0);
 174   if (num_alt_names > 0)
 175     gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME, alt_names[0]);
 176   gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0);
 177   gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT);
 178   gnutls_x509_crt_set_version(crt, 3);
 179
 180   bytes = sizeof(buffer);
 181   if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0)
 182     gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes);
 183
 184   gnutls_x509_crt_sign(crt, crt, key);
 185
 186  /*
 187   * Save it...
 188   */
 189
 190   bytes = sizeof(buffer);
 191   if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0)
 192   {
 193     DEBUG_printf(("1cupsMakeServerCredentials: Unable to export public key and X.509 certificate: %s", gnutls_strerror(result)));
 194     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0);
 195     gnutls_x509_crt_deinit(crt);
 196     gnutls_x509_privkey_deinit(key);
 197     return (0);
 198   }
 199   else if ((fp = cupsFileOpen(crtfile, "w")) != NULL)
 200   {
 201     DEBUG_printf(("1cupsMakeServerCredentials: Writing public key and X.509 certificate to \"%s\".", crtfile));
 202     cupsFileWrite(fp, (char *)buffer, bytes);
 203     cupsFileClose(fp);
 204   }
 205   else
 206   {
 207     DEBUG_printf(("1cupsMakeServerCredentials: Unable to create public key and X.509 certificate file \"%s\": %s", crtfile, strerror(errno)));
 208     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0);
 209     gnutls_x509_crt_deinit(crt);
 210     gnutls_x509_privkey_deinit(key);
 211     return (0);
 212   }
 213
 214  /*
 215   * Cleanup...
 216   */
 217
 218   gnutls_x509_crt_deinit(crt);
 219   gnutls_x509_privkey_deinit(key);
 220
 221   DEBUG_puts("1cupsMakeServerCredentials: Successfully created credentials.");
 222
 223   return (1);
 224 }
 225
 226
 227 /*
 228  * 'cupsSetServerCredentials()' - Set the default server credentials.
 229  *
 230  * Note: The server credentials are used by all threads in the running process.
 231  * This function is threadsafe.
 232  *
 233  * @since CUPS 2.0/OS 10.10@
 234  */
 235
 236 int                                     /* O - 1 on success, 0 on failure */
 237 cupsSetServerCredentials(
 238     const char *path,                   /* I - Path to keychain/directory */
 239     const char *common_name,            /* I - Default common name for server */
 240     int        auto_create)             /* I - 1 = automatically create self-signed certificates */
 241 {
 242   char  temp[1024];                     /* Default path buffer */
 243
 244
 245   DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create));
 246
 247  /*
 248   * Use defaults as needed...
 249   */
 250
 251   if (!path)
 252     path = http_gnutls_default_path(temp, sizeof(temp));
 253
 254  /*
 255   * Range check input...
 256   */
 257
 258   if (!path || !common_name)
 259   {
 260     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
 261     return (0);
 262   }
 263
 264   _cupsMutexLock(&tls_mutex);
 265
 266  /*
 267   * Free old values...
 268   */
 269
 270   if (tls_keypath)
 271     _cupsStrFree(tls_keypath);
 272
 273   if (tls_common_name)
 274     _cupsStrFree(tls_common_name);
 275
 276  /*
 277   * Save the new values...
 278   */
 279
 280   tls_keypath     = _cupsStrAlloc(path);
 281   tls_auto_create = auto_create;
 282   tls_common_name = _cupsStrAlloc(common_name);
 283
 284   _cupsMutexUnlock(&tls_mutex);
 285
 286   return (1);
 287 }
 288
 289
 290 /*
 291  * 'httpCopyCredentials()' - Copy the credentials associated with the peer in
 292  *                           an encrypted connection.
 293  *
 294  * @since CUPS 1.5/OS X 10.7@
 295  */
 296
 297 int                                     /* O - Status of call (0 = success) */
 298 httpCopyCredentials(
 299     http_t       *http,                 /* I - Connection to server */
 300     cups_array_t **credentials)         /* O - Array of credentials */
 301 {
 302   unsigned              count;          /* Number of certificates */
 303   const gnutls_datum_t *certs;          /* Certificates */
 304
 305
 306   DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials));
 307
 308   if (credentials)
 309     *credentials = NULL;
 310
 311   if (!http || !http->tls || !credentials)
 312     return (-1);
 313
 314   *credentials = cupsArrayNew(NULL, NULL);
 315   certs        = gnutls_certificate_get_peers(http->tls, &count);
 316
 317   DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count));
 318
 319   if (certs && count)
 320   {
 321     while (count > 0)
 322     {
 323       httpAddCredential(*credentials, certs->data, certs->size);
 324       certs ++;
 325       count --;
 326     }
 327   }
 328
 329   return (0);
 330 }
 331
 332
 333 /*
 334  * '_httpCreateCredentials()' - Create credentials in the internal format.
 335  */
 336
 337 http_tls_credentials_t                  /* O - Internal credentials */
 338 _httpCreateCredentials(
 339     cups_array_t *credentials)          /* I - Array of credentials */
 340 {
 341   (void)credentials;
 342
 343   return (NULL);
 344 }
 345
 346
 347 /*
 348  * '_httpFreeCredentials()' - Free internal credentials.
 349  */
 350
 351 void
 352 _httpFreeCredentials(
 353     http_tls_credentials_t credentials) /* I - Internal credentials */
 354 {
 355   (void)credentials;
 356 }
 357
 358
 359 /*
 360  * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name.
 361  *
 362  * @since CUPS 2.0/OS 10.10@
 363  */
 364
 365 int                                     /* O - 1 if valid, 0 otherwise */
 366 httpCredentialsAreValidForName(
 367     cups_array_t *credentials,          /* I - Credentials */
 368     const char   *common_name)          /* I - Name to check */
 369 {
 370   gnutls_x509_crt_t     cert;           /* Certificate */
 371   int                   result = 0;     /* Result */
 372
 373
 374   cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials));
 375   if (cert)
 376   {
 377     result = gnutls_x509_crt_check_hostname(cert, common_name) != 0;
 378     gnutls_x509_crt_deinit(cert);
 379   }
 380
 381   return (result);
 382 }
 383
 384
 385 /*
 386  * 'httpCredentialsGetTrust()' - Return the trust of credentials.
 387  *
 388  * @since CUPS 2.0/OS 10.10@
 389  */
 390
 391 http_trust_t                            /* O - Level of trust */
 392 httpCredentialsGetTrust(
 393     cups_array_t *credentials,          /* I - Credentials */
 394     const char   *common_name)          /* I - Common name for trust lookup */
 395 {
 396   http_trust_t          trust = HTTP_TRUST_OK;
 397                                         /* Trusted? */
 398   gnutls_x509_crt_t     cert;           /* Certificate */
 399   cups_array_t          *tcreds = NULL; /* Trusted credentials */
 400   _cups_globals_t       *cg = _cupsGlobals();
 401                                         /* Per-thread globals */
 402
 403
 404   if (!common_name)
 405     return (HTTP_TRUST_UNKNOWN);
 406
 407   if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL)
 408     return (HTTP_TRUST_UNKNOWN);
 409
 410   if (cg->any_root < 0)
 411     _cupsSetDefaults();
 412
 413  /*
 414   * Look this common name up in the default keychains...
 415   */
 416
 417   httpLoadCredentials(NULL, &tcreds, common_name);
 418
 419   if (tcreds)
 420   {
 421     char        credentials_str[1024],  /* String for incoming credentials */
 422                 tcreds_str[1024];       /* String for saved credentials */
 423
 424     httpCredentialsString(credentials, credentials_str, sizeof(credentials_str));
 425     httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str));
 426
 427     if (strcmp(credentials_str, tcreds_str))
 428     {
 429      /*
 430       * Credentials don't match, let's look at the expiration date of the new
 431       * credentials and allow if the new ones have a later expiration...
 432       */
 433
 434       if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) ||
 435           !httpCredentialsAreValidForName(credentials, common_name))
 436       {
 437        /*
 438         * Either the new credentials are not newly issued, or the common name
 439         * does not match the issued certificate...
 440         */
 441
 442         trust = HTTP_TRUST_INVALID;
 443       }
 444       else if (httpCredentialsGetExpiration(tcreds) < time(NULL))
 445       {
 446        /*
 447         * Save the renewed credentials...
 448         */
 449
 450         trust = HTTP_TRUST_RENEWED;
 451
 452         httpSaveCredentials(NULL, credentials, common_name);
 453       }
 454     }
 455
 456     httpFreeCredentials(tcreds);
 457   }
 458   else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name))
 459     trust = HTTP_TRUST_INVALID;
 460
 461   if (trust == HTTP_TRUST_OK && !cg->expired_certs)
 462   {
 463     time_t      curtime;                /* Current date/time */
 464
 465     time(&curtime);
 466     if (curtime < gnutls_x509_crt_get_activation_time(cert) ||
 467         curtime > gnutls_x509_crt_get_expiration_time(cert))
 468       trust = HTTP_TRUST_EXPIRED;
 469   }
 470
 471   if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1)
 472     trust = HTTP_TRUST_INVALID;
 473
 474   gnutls_x509_crt_deinit(cert);
 475
 476   return (trust);
 477 }
 478
 479
 480 /*
 481  * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials.
 482  *
 483  * @since CUPS 2.0/OS 10.10@
 484  */
 485
 486 time_t                                  /* O - Expiration date of credentials */
 487 httpCredentialsGetExpiration(
 488     cups_array_t *credentials)          /* I - Credentials */
 489 {
 490   gnutls_x509_crt_t     cert;           /* Certificate */
 491   time_t                result = 0;     /* Result */
 492
 493
 494   cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials));
 495   if (cert)
 496   {
 497     result = gnutls_x509_crt_get_expiration_time(cert);
 498     gnutls_x509_crt_deinit(cert);
 499   }
 500
 501   return (result);
 502 }
 503
 504
 505 /*
 506  * 'httpCredentialsString()' - Return a string representing the credentials.
 507  *
 508  * @since CUPS 2.0/OS 10.10@
 509  */
 510
 511 size_t                                  /* O - Total size of credentials string */
 512 httpCredentialsString(
 513     cups_array_t *credentials,          /* I - Credentials */
 514     char         *buffer,               /* I - Buffer or @code NULL@ */
 515     size_t       bufsize)               /* I - Size of buffer */
 516 {
 517   http_credential_t     *first;         /* First certificate */
 518   gnutls_x509_crt_t     cert;           /* Certificate */
 519
 520
 521   DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize));
 522
 523   if (!buffer)
 524     return (0);
 525
 526   if (buffer && bufsize > 0)
 527     *buffer = '\0';
 528
 529   if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL &&
 530       (cert = http_gnutls_create_credential(first)) != NULL)
 531   {
 532     char                name[256];      /* Common name associated with cert */
 533     size_t              namelen;        /* Length of name */
 534     time_t              expiration;     /* Expiration date of cert */
 535     _cups_md5_state_t   md5_state;      /* MD5 state */
 536     unsigned char       md5_digest[16]; /* MD5 result */
 537
 538     namelen = sizeof(name) - 1;
 539     if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0)
 540       name[namelen] = '\0';
 541     else
 542       strlcpy(name, "unknown", sizeof(name));
 543
 544     expiration = gnutls_x509_crt_get_expiration_time(cert);
 545
 546     _cupsMD5Init(&md5_state);
 547     _cupsMD5Append(&md5_state, first->data, (int)first->datalen);
 548     _cupsMD5Finish(&md5_state, md5_digest);
 549
 550     snprintf(buffer, bufsize, "%s / %s / %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", name, httpGetDateString(expiration), md5_digest[0], md5_digest[1], md5_digest[2], md5_digest[3], md5_digest[4], md5_digest[5], md5_digest[6], md5_digest[7], md5_digest[8], md5_digest[9], md5_digest[10], md5_digest[11], md5_digest[12], md5_digest[13], md5_digest[14], md5_digest[15]);
 551
 552     gnutls_x509_crt_deinit(cert);
 553   }
 554
 555   DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer));
 556
 557   return (strlen(buffer));
 558 }
 559
 560
 561 /*
 562  * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file.
 563  *
 564  * @since CUPS 2.0/OS 10.10@
 565  */
 566
 567 int                                     /* O - 0 on success, -1 on error */
 568 httpLoadCredentials(
 569     const char   *path,                 /* I  - Keychain/PKCS#12 path */
 570     cups_array_t **credentials,         /* IO - Credentials */
 571     const char   *common_name)          /* I  - Common name for credentials */
 572 {
 573   cups_file_t           *fp;            /* Certificate file */
 574   char                  filename[1024], /* filename.crt */
 575                         temp[1024],     /* Temporary string */
 576                         line[256];      /* Base64-encoded line */
 577   unsigned char         *data = NULL;   /* Buffer for cert data */
 578   size_t                alloc_data = 0, /* Bytes allocated */
 579                         num_data = 0;   /* Bytes used */
 580   int                   decoded;        /* Bytes decoded */
 581
 582
 583   if (!credentials || !common_name)
 584     return (-1);
 585
 586   if (!path)
 587     path = http_gnutls_default_path(temp, sizeof(temp));
 588   if (!path)
 589     return (-1);
 590
 591   http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt");
 592
 593   if ((fp = cupsFileOpen(filename, "r")) == NULL)
 594     return (-1);
 595
 596   while (cupsFileGets(fp, line, sizeof(line)))
 597   {
 598     if (!strcmp(line, "-----BEGIN CERTIFICATE-----"))
 599     {
 600       if (num_data)
 601       {
 602        /*
 603         * Missing END CERTIFICATE...
 604         */
 605
 606         httpFreeCredentials(*credentials);
 607         *credentials = NULL;
 608         break;
 609       }
 610     }
 611     else if (!strcmp(line, "-----END CERTIFICATE-----"))
 612     {
 613       if (!num_data)
 614       {
 615        /*
 616         * Missing data...
 617         */
 618
 619         httpFreeCredentials(*credentials);
 620         *credentials = NULL;
 621         break;
 622       }
 623
 624       if (!*credentials)
 625         *credentials = cupsArrayNew(NULL, NULL);
 626
 627       if (httpAddCredential(*credentials, data, num_data))
 628       {
 629         httpFreeCredentials(*credentials);
 630         *credentials = NULL;
 631         break;
 632       }
 633
 634       num_data = 0;
 635     }
 636     else
 637     {
 638       if (alloc_data == 0)
 639       {
 640         data       = malloc(2048);
 641         alloc_data = 2048;
 642
 643         if (!data)
 644           break;
 645       }
 646       else if ((num_data + strlen(line)) >= alloc_data)
 647       {
 648         unsigned char *tdata = realloc(data, alloc_data + 1024);
 649                                         /* Expanded buffer */
 650
 651         if (!tdata)
 652         {
 653           httpFreeCredentials(*credentials);
 654           *credentials = NULL;
 655           break;
 656         }
 657
 658         data       = tdata;
 659         alloc_data += 1024;
 660       }
 661
 662       decoded = alloc_data - num_data;
 663       httpDecode64_2((char *)data + num_data, &decoded, line);
 664       num_data += (size_t)decoded;
 665     }
 666   }
 667
 668   cupsFileClose(fp);
 669
 670   if (num_data)
 671   {
 672    /*
 673     * Missing END CERTIFICATE...
 674     */
 675
 676     httpFreeCredentials(*credentials);
 677     *credentials = NULL;
 678   }
 679
 680   if (data)
 681     free(data);
 682
 683   return (*credentials ? 0 : -1);
 684 }
 685
 686
 687 /*
 688  * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file.
 689  *
 690  * @since CUPS 2.0/OS 10.10@
 691  */
 692
 693 int                                     /* O - -1 on error, 0 on success */
 694 httpSaveCredentials(
 695     const char   *path,                 /* I - Keychain/PKCS#12 path */
 696     cups_array_t *credentials,          /* I - Credentials */
 697     const char   *common_name)          /* I - Common name for credentials */
 698 {
 699   cups_file_t           *fp;            /* Certificate file */
 700   char                  filename[1024], /* filename.crt */
 701                         nfilename[1024],/* filename.crt.N */
 702                         temp[1024],     /* Temporary string */
 703                         line[256];      /* Base64-encoded line */
 704   const unsigned char   *ptr;           /* Pointer into certificate */
 705   ssize_t               remaining;      /* Bytes left */
 706   http_credential_t     *cred;          /* Current credential */
 707
 708
 709   if (!credentials || !common_name)
 710     return (-1);
 711
 712   if (!path)
 713     path = http_gnutls_default_path(temp, sizeof(temp));
 714   if (!path)
 715     return (-1);
 716
 717   http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt");
 718   snprintf(nfilename, sizeof(nfilename), "%s.N", filename);
 719
 720   if ((fp = cupsFileOpen(nfilename, "w")) == NULL)
 721     return (-1);
 722
 723   fchmod(cupsFileNumber(fp), 0600);
 724
 725   for (cred = (http_credential_t *)cupsArrayFirst(credentials);
 726        cred;
 727        cred = (http_credential_t *)cupsArrayNext(credentials))
 728   {
 729     cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n");
 730     for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45)
 731     {
 732       httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining);
 733       cupsFilePrintf(fp, "%s\n", line);
 734     }
 735     cupsFilePuts(fp, "-----END CERTIFICATE-----\n");
 736   }
 737
 738   cupsFileClose(fp);
 739
 740   return (rename(nfilename, filename));
 741 }
 742
 743
 744 /*
 745  * 'http_gnutls_create_credential()' - Create a single credential in the internal format.
 746  */
 747
 748 static gnutls_x509_crt_t                        /* O - Certificate */
 749 http_gnutls_create_credential(
 750     http_credential_t *credential)              /* I - Credential */
 751 {
 752   int                   result;                 /* Result from GNU TLS */
 753   gnutls_x509_crt_t     cert;                   /* Certificate */
 754   gnutls_datum_t        datum;                  /* Data record */
 755
 756
 757   DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential));
 758
 759   if (!credential)
 760     return (NULL);
 761
 762   if ((result = gnutls_x509_crt_init(&cert)) < 0)
 763   {
 764     DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result)));
 765     return (NULL);
 766   }
 767
 768   datum.data = credential->data;
 769   datum.size = credential->datalen;
 770
 771   if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0)
 772   {
 773     DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result)));
 774
 775     gnutls_x509_crt_deinit(cert);
 776     return (NULL);
 777   }
 778
 779   return (cert);
 780 }
 781
 782
 783 /*
 784  * 'http_gnutls_default_path()' - Get the default credential store path.
 785  */
 786
 787 static const char *                     /* O - Path or NULL on error */
 788 http_gnutls_default_path(char   *buffer,/* I - Path buffer */
 789                          size_t bufsize)/* I - Size of path buffer */
 790 {
 791   const char *home = getenv("HOME");    /* HOME environment variable */
 792
 793
 794   if (getuid() && home)
 795   {
 796     snprintf(buffer, bufsize, "%s/.cups", home);
 797     if (access(buffer, 0))
 798     {
 799       DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer));
 800       if (mkdir(buffer, 0700))
 801       {
 802         DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno)));
 803         return (NULL);
 804       }
 805     }
 806
 807     snprintf(buffer, bufsize, "%s/.cups/ssl", home);
 808     if (access(buffer, 0))
 809     {
 810       DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer));
 811       if (mkdir(buffer, 0700))
 812       {
 813         DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno)));
 814         return (NULL);
 815       }
 816     }
 817   }
 818   else
 819     strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize);
 820
 821   DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer));
 822
 823   return (buffer);
 824 }
 825
 826
 827 /*
 828  * 'http_gnutls_make_path()' - Format a filename for a certificate or key file.
 829  */
 830
 831 static const char *                     /* O - Filename */
 832 http_gnutls_make_path(
 833     char       *buffer,                 /* I - Filename buffer */
 834     size_t     bufsize,                 /* I - Size of buffer */
 835     const char *dirname,                /* I - Directory */
 836     const char *filename,               /* I - Filename (usually hostname) */
 837     const char *ext)                    /* I - Extension */
 838 {
 839   char  *bufptr,                        /* Pointer into buffer */
 840         *bufend = buffer + bufsize - 1; /* End of buffer */
 841
 842
 843   snprintf(buffer, bufsize, "%s/", dirname);
 844   bufptr = buffer + strlen(buffer);
 845
 846   while (*filename && bufptr < bufend)
 847   {
 848     if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.')
 849       *bufptr++ = *filename;
 850     else
 851       *bufptr++ = '_';
 852
 853     filename ++;
 854   }
 855
 856   if (bufptr < bufend)
 857     *bufptr++ = '.';
 858
 859   strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1));
 860
 861   return (buffer);
 862 }
 863
 864
 865 /*
 866  * 'http_gnutls_read()' - Read function for the GNU TLS library.
 867  */
 868
 869 static ssize_t                          /* O - Number of bytes read or -1 on error */
 870 http_gnutls_read(
 871     gnutls_transport_ptr_t ptr,         /* I - Connection to server */
 872     void                   *data,       /* I - Buffer */
 873     size_t                 length)      /* I - Number of bytes to read */
 874 {
 875   http_t        *http;                  /* HTTP connection */
 876   ssize_t       bytes;                  /* Bytes read */
 877
 878
 879   DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length));
 880
 881   http = (http_t *)ptr;
 882
 883   if (!http->blocking)
 884   {
 885    /*
 886     * Make sure we have data before we read...
 887     */
 888
 889     while (!_httpWait(http, http->wait_value, 0))
 890     {
 891       if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data))
 892         continue;
 893
 894       http->error = ETIMEDOUT;
 895       return (-1);
 896     }
 897   }
 898
 899   bytes = recv(http->fd, data, length, 0);
 900   DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes));
 901   return (bytes);
 902 }
 903
 904
 905 /*
 906  * 'http_gnutls_write()' - Write function for the GNU TLS library.
 907  */
 908
 909 static ssize_t                          /* O - Number of bytes written or -1 on error */
 910 http_gnutls_write(
 911     gnutls_transport_ptr_t ptr,         /* I - Connection to server */
 912     const void             *data,       /* I - Data buffer */
 913     size_t                 length)      /* I - Number of bytes to write */
 914 {
 915   ssize_t bytes;                        /* Bytes written */
 916
 917
 918   DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data,
 919                 (int)length));
 920   bytes = send(((http_t *)ptr)->fd, data, length, 0);
 921   DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes));
 922
 923   return (bytes);
 924 }
 925
 926
 927 /*
 928  * '_httpTLSInitialize()' - Initialize the TLS stack.
 929  */
 930
 931 void
 932 _httpTLSInitialize(void)
 933 {
 934  /*
 935   * Initialize GNU TLS...
 936   */
 937
 938   gnutls_global_init();
 939 }
 940
 941
 942 /*
 943  * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes.
 944  */
 945
 946 size_t                                  /* O - Bytes available */
 947 _httpTLSPending(http_t *http)           /* I - HTTP connection */
 948 {
 949   return (gnutls_record_check_pending(http->tls));
 950 }
 951
 952
 953 /*
 954  * '_httpTLSRead()' - Read from a SSL/TLS connection.
 955  */
 956
 957 int                                     /* O - Bytes read */
 958 _httpTLSRead(http_t *http,              /* I - Connection to server */
 959              char   *buf,               /* I - Buffer to store data */
 960              int    len)                /* I - Length of buffer */
 961 {
 962   ssize_t       result;                 /* Return value */
 963
 964
 965   result = gnutls_record_recv(http->tls, buf, (size_t)len);
 966
 967   if (result < 0 && !errno)
 968   {
 969    /*
 970     * Convert GNU TLS error to errno value...
 971     */
 972
 973     switch (result)
 974     {
 975       case GNUTLS_E_INTERRUPTED :
 976           errno = EINTR;
 977           break;
 978
 979       case GNUTLS_E_AGAIN :
 980           errno = EAGAIN;
 981           break;
 982
 983       default :
 984           errno = EPIPE;
 985           break;
 986     }
 987
 988     result = -1;
 989   }
 990
 991   return ((int)result);
 992 }
 993
 994
 995 /*
 996  * '_httpTLSSetCredentials()' - Set the TLS credentials.
 997  */
 998
 999 int                                     /* O - Status of connection */
1000 _httpTLSSetCredentials(http_t *http)    /* I - Connection to server */
1001 {
1002   (void)http;
1003
1004   return (0);
1005 }
1006
1007
1008 /*
1009  * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options.
1010  */
1011
1012 void
1013 _httpTLSSetOptions(int options)         /* I - Options */
1014 {
1015   tls_options = options;
1016 }
1017
1018
1019 /*
1020  * '_httpTLSStart()' - Set up SSL/TLS support on a connection.
1021  */
1022
1023 int                                     /* O - 0 on success, -1 on failure */
1024 _httpTLSStart(http_t *http)             /* I - Connection to server */
1025 {
1026   char                  hostname[256],  /* Hostname */
1027                         *hostptr;       /* Pointer into hostname */
1028   int                   status;         /* Status of handshake */
1029   gnutls_certificate_credentials_t *credentials;
1030                                         /* TLS credentials */
1031   char                  priority_string[1024];
1032                                         /* Priority string */
1033
1034
1035   DEBUG_printf(("3_httpTLSStart(http=%p)", http));
1036
1037   if (tls_options < 0)
1038   {
1039     DEBUG_puts("4_httpTLSStart: Setting defaults.");
1040     _cupsSetDefaults();
1041     DEBUG_printf(("4_httpTLSStart: tls_options=%x", tls_options));
1042   }
1043
1044   if (http->mode == _HTTP_MODE_SERVER && !tls_keypath)
1045   {
1046     DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called.");
1047     http->error  = errno = EINVAL;
1048     http->status = HTTP_STATUS_ERROR;
1049     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1);
1050
1051     return (-1);
1052   }
1053
1054   credentials = (gnutls_certificate_credentials_t *)
1055                     malloc(sizeof(gnutls_certificate_credentials_t));
1056   if (credentials == NULL)
1057   {
1058     DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s",
1059                   strerror(errno)));
1060     http->error  = errno;
1061     http->status = HTTP_STATUS_ERROR;
1062     _cupsSetHTTPError(HTTP_STATUS_ERROR);
1063
1064     return (-1);
1065   }
1066
1067   gnutls_certificate_allocate_credentials(credentials);
1068   status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER);
1069   if (!status)
1070     status = gnutls_set_default_priority(http->tls);
1071
1072   if (status)
1073   {
1074     http->error  = EIO;
1075     http->status = HTTP_STATUS_ERROR;
1076
1077     DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status)));
1078     _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0);
1079
1080     gnutls_deinit(http->tls);
1081     gnutls_certificate_free_credentials(*credentials);
1082     free(credentials);
1083     http->tls = NULL;
1084
1085     return (-1);
1086   }
1087
1088   if (http->mode == _HTTP_MODE_CLIENT)
1089   {
1090    /*
1091     * Client: get the hostname to use for TLS...
1092     */
1093
1094     if (httpAddrLocalhost(http->hostaddr))
1095     {
1096       strlcpy(hostname, "localhost", sizeof(hostname));
1097     }
1098     else
1099     {
1100      /*
1101       * Otherwise make sure the hostname we have does not end in a trailing dot.
1102       */
1103
1104       strlcpy(hostname, http->hostname, sizeof(hostname));
1105       if ((hostptr = hostname + strlen(hostname) - 1) >= hostname &&
1106           *hostptr == '.')
1107         *hostptr = '\0';
1108     }
1109
1110     status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname));
1111   }
1112   else
1113   {
1114    /*
1115     * Server: get certificate and private key...
1116     */
1117
1118     char        crtfile[1024],          /* Certificate file */
1119                 keyfile[1024];          /* Private key file */
1120     int         have_creds = 0;         /* Have credentials? */
1121
1122     if (http->fields[HTTP_FIELD_HOST][0])
1123     {
1124      /*
1125       * Use hostname for TLS upgrade...
1126       */
1127
1128       strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname));
1129     }
1130     else
1131     {
1132      /*
1133       * Resolve hostname from connection address...
1134       */
1135
1136       http_addr_t       addr;           /* Connection address */
1137       socklen_t         addrlen;        /* Length of address */
1138
1139       addrlen = sizeof(addr);
1140       if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen))
1141       {
1142         DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno)));
1143         hostname[0] = '\0';
1144       }
1145       else if (httpAddrLocalhost(&addr))
1146         hostname[0] = '\0';
1147       else
1148       {
1149         httpAddrLookup(&addr, hostname, sizeof(hostname));
1150         DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname));
1151       }
1152     }
1153
1154     if (isdigit(hostname[0] & 255) || hostname[0] == '[')
1155       hostname[0] = '\0';               /* Don't allow numeric addresses */
1156
1157     if (hostname[0])
1158     {
1159       http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt");
1160       http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key");
1161
1162       have_creds = !access(crtfile, 0) && !access(keyfile, 0);
1163     }
1164     else if (tls_common_name)
1165     {
1166       http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt");
1167       http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key");
1168
1169       have_creds = !access(crtfile, 0) && !access(keyfile, 0);
1170     }
1171
1172     if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name))
1173     {
1174       DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name));
1175
1176       if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400))
1177       {
1178         DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed.");
1179         http->error  = errno = EINVAL;
1180         http->status = HTTP_STATUS_ERROR;
1181         _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1);
1182
1183         return (-1);
1184       }
1185     }
1186
1187     DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile));
1188
1189     status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM);
1190   }
1191
1192   if (!status)
1193     status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials);
1194
1195   if (status)
1196   {
1197     http->error  = EIO;
1198     http->status = HTTP_STATUS_ERROR;
1199
1200     DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status)));
1201     _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0);
1202
1203     gnutls_deinit(http->tls);
1204     gnutls_certificate_free_credentials(*credentials);
1205     free(credentials);
1206     http->tls = NULL;
1207
1208     return (-1);
1209   }
1210
1211   strlcpy(priority_string, "NORMAL", sizeof(priority_string));
1212
1213   if (tls_options & _HTTP_TLS_DENY_TLS10)
1214     strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-TLS1.0:-VERS-SSL3.0", sizeof(priority_string));
1215   else if (tls_options & _HTTP_TLS_ALLOW_SSL3)
1216     strlcat(priority_string, ":+VERS-TLS-ALL", sizeof(priority_string));
1217   else
1218     strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-SSL3.0", sizeof(priority_string));
1219
1220   if (!(tls_options & _HTTP_TLS_ALLOW_RC4))
1221     strlcat(priority_string, ":-ARCFOUR-128", sizeof(priority_string));
1222
1223   if (!(tls_options & _HTTP_TLS_ALLOW_DH))
1224     strlcat(priority_string, ":!ANON-DH", sizeof(priority_string));
1225
1226 #ifdef HAVE_GNUTLS_PRIORITY_SET_DIRECT
1227   gnutls_priority_set_direct(http->tls, priority_string, NULL);
1228
1229 #else
1230   gnutls_priority_t priority;           /* Priority */
1231
1232   gnutls_priority_init(&priority, priority_string, NULL);
1233   gnutls_priority_set(http->tls, priority);
1234   gnutls_priority_deinit(priority);
1235 #endif /* HAVE_GNUTLS_PRIORITY_SET_DIRECT */
1236
1237   gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http);
1238   gnutls_transport_set_pull_function(http->tls, http_gnutls_read);
1239 #ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION
1240   gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait);
1241 #endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */
1242   gnutls_transport_set_push_function(http->tls, http_gnutls_write);
1243
1244   while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS)
1245   {
1246     DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)",
1247                   status, gnutls_strerror(status)));
1248
1249     if (gnutls_error_is_fatal(status))
1250     {
1251       http->error  = EIO;
1252       http->status = HTTP_STATUS_ERROR;
1253
1254       _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0);
1255
1256       gnutls_deinit(http->tls);
1257       gnutls_certificate_free_credentials(*credentials);
1258       free(credentials);
1259       http->tls = NULL;
1260
1261       return (-1);
1262     }
1263   }
1264
1265   http->tls_credentials = credentials;
1266
1267   return (0);
1268 }
1269
1270
1271 /*
1272  * '_httpTLSStop()' - Shut down SSL/TLS on a connection.
1273  */
1274
1275 void
1276 _httpTLSStop(http_t *http)              /* I - Connection to server */
1277 {
1278   int   error;                          /* Error code */
1279
1280
1281   error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR);
1282   if (error != GNUTLS_E_SUCCESS)
1283     _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0);
1284
1285   gnutls_deinit(http->tls);
1286   http->tls = NULL;
1287
1288   if (http->tls_credentials)
1289   {
1290     gnutls_certificate_free_credentials(*(http->tls_credentials));
1291     free(http->tls_credentials);
1292     http->tls_credentials = NULL;
1293   }
1294 }
1295
1296
1297 /*
1298  * '_httpTLSWrite()' - Write to a SSL/TLS connection.
1299  */
1300
1301 int                                     /* O - Bytes written */
1302 _httpTLSWrite(http_t     *http,         /* I - Connection to server */
1303               const char *buf,          /* I - Buffer holding data */
1304               int        len)           /* I - Length of buffer */
1305 {
1306   ssize_t       result;                 /* Return value */
1307
1308
1309   DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len));
1310
1311   result = gnutls_record_send(http->tls, buf, (size_t)len);
1312
1313   if (result < 0 && !errno)
1314   {
1315    /*
1316     * Convert GNU TLS error to errno value...
1317     */
1318
1319     switch (result)
1320     {
1321       case GNUTLS_E_INTERRUPTED :
1322           errno = EINTR;
1323           break;
1324
1325       case GNUTLS_E_AGAIN :
1326           errno = EAGAIN;
1327           break;
1328
1329       default :
1330           errno = EPIPE;
1331           break;
1332     }
1333
1334     result = -1;
1335   }
1336
1337   DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result));
1338
1339   return ((int)result);
1340 }
1341
1342
1343 /*
1344  * End of "$Id$".
1345  */