appl/test/http_client.c

   1 /*
   2  * Copyright (c) 2003 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "test_locl.h"
  35 #include <gssapi.h>
  36 #include "gss_common.h"
  37 #include <base64.h>
  38
  39 RCSID("$Id$");
  40
  41 /*
  42  * A simplistic client implementing draft-brezak-spnego-http-04.txt
  43  */
  44
  45 static int
  46 do_connect (const char *hostname, const char *port)
  47 {
  48     struct addrinfo *ai, *a;
  49     struct addrinfo hints;
  50     int error;
  51     int s = -1;
  52
  53     memset (&hints, 0, sizeof(hints));
  54     hints.ai_family = PF_UNSPEC;
  55     hints.ai_socktype = SOCK_STREAM;
  56     hints.ai_protocol = 0;
  57
  58     error = getaddrinfo (hostname, port, &hints, &ai);
  59     if (error)
  60         errx (1, "getaddrinfo(%s): %s", hostname, gai_strerror(error));
  61
  62     for (a = ai; a != NULL; a = a->ai_next) {
  63         s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
  64         if (s < 0)
  65             continue;
  66         if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
  67             warn ("connect(%s)", hostname);
  68             close (s);
  69             continue;
  70         }
  71         break;
  72     }
  73     freeaddrinfo (ai);
  74     if (a == NULL)
  75         errx (1, "failed to contact %s", hostname);
  76
  77     return s;
  78 }
  79
  80 static void
  81 fdprintf(int s, const char *fmt, ...)
  82 {
  83     size_t len;
  84     ssize_t ret;
  85     va_list ap;
  86     char *str, *buf;
  87
  88     va_start(ap, fmt);
  89     vasprintf(&str, fmt, ap);
  90     va_end(ap);
  91
  92     if (str == NULL)
  93         errx(1, "vasprintf");
  94
  95     buf = str;
  96     len = strlen(buf);
  97     while (len) {
  98         ret = write(s, buf, len);
  99         if (ret == 0)
 100             err(1, "connection closed");
 101         else if (ret < 0)
 102             err(1, "error");
 103         len -= ret;
 104         buf += ret;
 105     }
 106     free(str);
 107 }
 108
 109 static int help_flag;
 110 static int version_flag;
 111 static int verbose_flag;
 112 static int mutual_flag = 1;
 113 static int delegate_flag;
 114 static char *port_str = "http";
 115 static char *gss_service = "HTTP";
 116
 117 static struct getargs http_args[] = {
 118     { "verbose", 'v', arg_flag, &verbose_flag, "verbose logging", },
 119     { "port", 'p', arg_string, &port_str, "port to connect to", "port" },
 120     { "delegate", 0, arg_flag, &delegate_flag, "gssapi delegate credential" },
 121     { "gss-service", 's', arg_string, &gss_service, "gssapi service to use",
 122       "service" },
 123     { "mech", 'm', arg_string, &mech, "gssapi mech to use", "mech" },
 124     { "mutual", 0, arg_negative_flag, &mutual_flag, "no gssapi mutual auth" },
 125     { "help", 'h', arg_flag, &help_flag },
 126     { "version", 0, arg_flag, &version_flag }
 127 };
 128
 129 static int num_http_args = sizeof(http_args) / sizeof(http_args[0]);
 130
 131 static void
 132 usage(int code)
 133 {
 134     arg_printusage(http_args, num_http_args, NULL, "host [page]");
 135     exit(code);
 136 }
 137
 138 /*
 139  *
 140  */
 141
 142 struct http_req {
 143     char *response;
 144     char **headers;
 145     int num_headers;
 146     void *body;
 147     size_t body_size;
 148 };
 149
 150
 151 static void
 152 http_req_zero(struct http_req *req)
 153 {
 154     req->response = NULL;
 155     req->headers = NULL;
 156     req->num_headers = 0;
 157     req->body = NULL;
 158     req->body_size = 0;
 159 }
 160
 161 static void
 162 http_req_free(struct http_req *req)
 163 {
 164     int i;
 165
 166     free(req->response);
 167     for (i = 0; i < req->num_headers; i++)
 168         free(req->headers[i]);
 169     free(req->headers);
 170     free(req->body);
 171     http_req_zero(req);
 172 }
 173
 174 static const char *
 175 http_find_header(struct http_req *req, const char *header)
 176 {
 177     int i, len = strlen(header);
 178
 179     for (i = 0; i < req->num_headers; i++) {
 180         if (strncasecmp(header, req->headers[i], len) == 0) {
 181             return req->headers[i] + len + 1;
 182         }
 183     }
 184     return NULL;
 185 }
 186
 187
 188 static int
 189 http_query(const char *host, const char *page,
 190            char **headers, int num_headers, struct http_req *req)
 191 {
 192     enum { RESPONSE, HEADER, BODY } state;
 193     ssize_t ret;
 194     char in_buf[1024], *in_ptr = in_buf;
 195     size_t in_len = 0;
 196     int s, i;
 197
 198     http_req_zero(req);
 199
 200     s = do_connect(host, port_str);
 201     if (s < 0)
 202         errx(1, "connection failed");
 203
 204     fdprintf(s, "GET %s HTTP/1.0\r\n", page);
 205     for (i = 0; i < num_headers; i++)
 206         fdprintf(s, "%s\r\n", headers[i]);
 207     fdprintf(s, "Host: %s\r\n\r\n", host);
 208
 209     state = RESPONSE;
 210
 211     while (1) {
 212         ret = read (s, in_ptr, sizeof(in_buf) - in_len - 1);
 213         if (ret == 0)
 214             break;
 215         else if (ret < 0)
 216             err (1, "read: %lu", (unsigned long)ret);
 217
 218         in_buf[ret + in_len] = '\0';
 219
 220         if (state == HEADER || state == RESPONSE) {
 221             char *p;
 222
 223             in_len += ret;
 224             in_ptr += ret;
 225
 226             while (1) {
 227                 p = strstr(in_buf, "\r\n");
 228
 229                 if (p == NULL) {
 230                     break;
 231                 } else if (p == in_buf) {
 232                     memmove(in_buf, in_buf + 2, sizeof(in_buf) - 2);
 233                     state = BODY;
 234                     in_len -= 2;
 235                     in_ptr -= 2;
 236                     break;
 237                 } else if (state == RESPONSE) {
 238                     req->response = strndup(in_buf, p - in_buf);
 239                     state = HEADER;
 240                 } else {
 241                     req->headers = realloc(req->headers,
 242                                            (req->num_headers + 1) * sizeof(req->headers[0]));
 243                     req->headers[req->num_headers] = strndup(in_buf, p - in_buf);
 244                     if (req->headers[req->num_headers] == NULL)
 245                         errx(1, "strdup");
 246                     req->num_headers++;
 247                 }
 248                 memmove(in_buf, p + 2, sizeof(in_buf) - (p - in_buf) - 2);
 249                 in_len -= (p - in_buf) + 2;
 250                 in_ptr -= (p - in_buf) + 2;
 251             }
 252         }
 253
 254         if (state == BODY) {
 255
 256             req->body = erealloc(req->body, req->body_size + ret + 1);
 257
 258             memcpy((char *)req->body + req->body_size, in_buf, ret);
 259             req->body_size += ret;
 260             ((char *)req->body)[req->body_size] = '\0';
 261
 262             in_ptr = in_buf;
 263             in_len = 0;
 264         } else
 265             abort();
 266     }
 267
 268     if (verbose_flag) {
 269         int i;
 270         printf("response: %s\n", req->response);
 271         for (i = 0; i < req->num_headers; i++)
 272             printf("header[%d] %s\n", i, req->headers[i]);
 273         printf("body: %.*s\n", (int)req->body_size, (char *)req->body);
 274     }
 275
 276     close(s);
 277     return 0;
 278 }
 279
 280
 281 int
 282 main(int argc, char **argv)
 283 {
 284     struct http_req req;
 285     const char *host, *page;
 286     int i, done, print_body, gssapi_done, gssapi_started;
 287     char *headers[10]; /* XXX */
 288     int num_headers;
 289     gss_ctx_id_t context_hdl = GSS_C_NO_CONTEXT;
 290     gss_name_t server = GSS_C_NO_NAME;
 291     int optind = 0;
 292     gss_OID mech_oid;
 293     OM_uint32 flags;
 294
 295     setprogname(argv[0]);
 296
 297     if(getarg(http_args, num_http_args, argc, argv, &optind))
 298         usage(1);
 299
 300     if (help_flag)
 301         usage (0);
 302
 303     if(version_flag) {
 304         print_version(NULL);
 305         exit(0);
 306     }
 307
 308     argc -= optind;
 309     argv += optind;
 310
 311     mech_oid = select_mech(mech);
 312
 313     if (argc != 1 && argc != 2)
 314         errx(1, "usage: %s host [page]", getprogname());
 315     host = argv[0];
 316     if (argc == 2)
 317         page = argv[1];
 318     else
 319         page = "/";
 320
 321     flags = 0;
 322     if (delegate_flag)
 323         flags |= GSS_C_DELEG_FLAG;
 324     if (mutual_flag)
 325         flags |= GSS_C_MUTUAL_FLAG;
 326
 327     done = 0;
 328     num_headers = 0;
 329     gssapi_done = 1;
 330     gssapi_started = 0;
 331     do {
 332         print_body = 0;
 333
 334         http_query(host, page, headers, num_headers, &req);
 335         for (i = 0 ; i < num_headers; i++)
 336             free(headers[i]);
 337         num_headers = 0;
 338
 339         if (strstr(req.response, " 200 ") != NULL) {
 340             print_body = 1;
 341             done = 1;
 342         } else if (strstr(req.response, " 401 ") != NULL) {
 343             if (http_find_header(&req, "WWW-Authenticate:") == NULL)
 344                 errx(1, "Got %s but missed `WWW-Authenticate'", req.response);
 345             gssapi_done = 0;
 346         }
 347
 348         if (!gssapi_done) {
 349             const char *h = http_find_header(&req, "WWW-Authenticate:");
 350             if (h == NULL)
 351                 errx(1, "Got %s but missed `WWW-Authenticate'", req.response);
 352
 353             if (strncasecmp(h, "Negotiate", 9) == 0) {
 354                 OM_uint32 maj_stat, min_stat;
 355                 gss_buffer_desc input_token, output_token;
 356
 357                 if (verbose_flag)
 358                     printf("Negotiate found\n");
 359
 360                 if (server == GSS_C_NO_NAME) {
 361                     char *name;
 362                     asprintf(&name, "%s@%s", gss_service, host);
 363                     input_token.length = strlen(name);
 364                     input_token.value = name;
 365
 366                     maj_stat = gss_import_name(&min_stat,
 367                                                &input_token,
 368                                                GSS_C_NT_HOSTBASED_SERVICE,
 369                                                &server);
 370                     if (GSS_ERROR(maj_stat))
 371                         gss_err (1, min_stat, "gss_inport_name");
 372                     free(name);
 373                     input_token.length = 0;
 374                     input_token.value = NULL;
 375                 }
 376
 377                 i = 9;
 378                 while(h[i] && isspace((unsigned char)h[i]))
 379                     i++;
 380                 if (h[i] != '\0') {
 381                     int len = strlen(&h[i]);
 382                     if (len == 0)
 383                         errx(1, "invalid Negotiate token");
 384                     input_token.value = emalloc(len);
 385                     len = base64_decode(&h[i], input_token.value);
 386                     if (len < 0)
 387                         errx(1, "invalid base64 Negotiate token %s", &h[i]);
 388                     input_token.length = len;
 389                 } else {
 390                     if (gssapi_started)
 391                         errx(1, "Negotiate already started");
 392                     gssapi_started = 1;
 393
 394                     input_token.length = 0;
 395                     input_token.value = NULL;
 396                 }
 397
 398                 maj_stat =
 399                     gss_init_sec_context(&min_stat,
 400                                          GSS_C_NO_CREDENTIAL,
 401                                          &context_hdl,
 402                                          server,
 403                                          mech_oid,
 404                                          flags,
 405                                          0,
 406                                          GSS_C_NO_CHANNEL_BINDINGS,
 407                                          &input_token,
 408                                          NULL,
 409                                          &output_token,
 410                                          NULL,
 411                                          NULL);
 412                 if (GSS_ERROR(maj_stat))
 413                     gss_err (1, min_stat, "gss_init_sec_context");
 414                 else if (maj_stat & GSS_S_CONTINUE_NEEDED)
 415                     gssapi_done = 0;
 416                 else {
 417                     gss_name_t targ_name, src_name;
 418                     gss_buffer_desc name_buffer;
 419                     gss_OID mech_type;
 420
 421                     gssapi_done = 1;
 422
 423                     printf("Negotiate done: %s\n", mech);
 424
 425                     maj_stat = gss_inquire_context(&min_stat,
 426                                                    context_hdl,
 427                                                    &src_name,
 428                                                    &targ_name,
 429                                                    NULL,
 430                                                    &mech_type,
 431                                                    NULL,
 432                                                    NULL,
 433                                                    NULL);
 434                     if (GSS_ERROR(maj_stat))
 435                         gss_err (1, min_stat, "gss_inquire_context");
 436
 437                     maj_stat = gss_display_name(&min_stat,
 438                                                 src_name,
 439                                                 &name_buffer,
 440                                                 NULL);
 441                     if (GSS_ERROR(maj_stat))
 442                         gss_err (1, min_stat, "gss_display_name");
 443
 444                     printf("Source: %.*s\n",
 445                            (int)name_buffer.length,
 446                            (char *)name_buffer.value);
 447
 448                     gss_release_buffer(&min_stat, &name_buffer);
 449
 450                     maj_stat = gss_display_name(&min_stat,
 451                                                 targ_name,
 452                                                 &name_buffer,
 453                                                 NULL);
 454                     if (GSS_ERROR(maj_stat))
 455                         gss_err (1, min_stat, "gss_display_name");
 456
 457                     printf("Target: %.*s\n",
 458                            (int)name_buffer.length,
 459                            (char *)name_buffer.value);
 460
 461                     gss_release_name(&min_stat, &targ_name);
 462                     gss_release_buffer(&min_stat, &name_buffer);
 463                 }
 464
 465                 if (output_token.length) {
 466                     char *neg_token;
 467
 468                     base64_encode(output_token.value,
 469                                   output_token.length,
 470                                   &neg_token);
 471
 472                     asprintf(&headers[0], "Authorization: Negotiate %s",
 473                              neg_token);
 474
 475                     num_headers = 1;
 476                     free(neg_token);
 477                     gss_release_buffer(&min_stat, &output_token);
 478                 }
 479                 if (input_token.length)
 480                     free(input_token.value);
 481
 482             } else
 483                 done = 1;
 484         } else
 485             done = 1;
 486
 487         if (verbose_flag) {
 488             printf("%s\n\n", req.response);
 489
 490             for (i = 0; i < req.num_headers; i++)
 491                 printf("%s\n", req.headers[i]);
 492             printf("\n");
 493         }
 494         if (print_body || verbose_flag)
 495             printf("%.*s\n", (int)req.body_size, (char *)req.body);
 496
 497         http_req_free(&req);
 498     } while (!done);
 499
 500     if (gssapi_done == 0)
 501         errx(1, "gssapi not done but http dance done");
 502
 503     return 0;
 504 }