crypto/heimdal/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/gssapi.h>
  36 #include <gssapi/gssapi_krb5.h>
  37 #include <gssapi/gssapi_spnego.h>
  38 #include "gss_common.h"
  39 #include <base64.h>
  40
  41 RCSID("$Id$");
  42
  43 /*
  44  * A simplistic client implementing draft-brezak-spnego-http-04.txt
  45  */
  46
  47 static int
  48 do_connect (const char *hostname, const char *port)
  49 {
  50     struct addrinfo *ai, *a;
  51     struct addrinfo hints;
  52     int error;
  53     int s = -1;
  54
  55     memset (&hints, 0, sizeof(hints));
  56     hints.ai_family = PF_UNSPEC;
  57     hints.ai_socktype = SOCK_STREAM;
  58     hints.ai_protocol = 0;
  59
  60     error = getaddrinfo (hostname, port, &hints, &ai);
  61     if (error)
  62         errx (1, "getaddrinfo(%s): %s", hostname, gai_strerror(error));
  63
  64     for (a = ai; a != NULL; a = a->ai_next) {
  65         s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
  66         if (s < 0)
  67             continue;
  68         if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
  69             warn ("connect(%s)", hostname);
  70             close (s);
  71             continue;
  72         }
  73         break;
  74     }
  75     freeaddrinfo (ai);
  76     if (a == NULL)
  77         errx (1, "failed to contact %s", hostname);
  78
  79     return s;
  80 }
  81
  82 static void
  83 fdprintf(int s, const char *fmt, ...)
  84 {
  85     size_t len;
  86     ssize_t ret;
  87     va_list ap;
  88     char *str, *buf;
  89
  90     va_start(ap, fmt);
  91     vasprintf(&str, fmt, ap);
  92     va_end(ap);
  93
  94     if (str == NULL)
  95         errx(1, "vasprintf");
  96
  97     buf = str;
  98     len = strlen(buf);
  99     while (len) {
 100         ret = write(s, buf, len);
 101         if (ret == 0)
 102             err(1, "connection closed");
 103         else if (ret < 0)
 104             err(1, "error");
 105         len -= ret;
 106         buf += ret;
 107     }
 108     free(str);
 109 }
 110
 111 static int help_flag;
 112 static int version_flag;
 113 static int verbose_flag;
 114 static int mutual_flag = 1;
 115 static int delegate_flag;
 116 static char *port_str = "http";
 117 static char *gss_service = "HTTP";
 118
 119 static struct getargs http_args[] = {
 120     { "verbose", 'v', arg_flag, &verbose_flag, "verbose logging", },
 121     { "port", 'p', arg_string, &port_str, "port to connect to", "port" },
 122     { "delegate", 0, arg_flag, &delegate_flag, "gssapi delegate credential" },
 123     { "gss-service", 's', arg_string, &gss_service, "gssapi service to use",
 124       "service" },
 125     { "mech", 'm', arg_string, &mech, "gssapi mech to use", "mech" },
 126     { "mutual", 0, arg_negative_flag, &mutual_flag, "no gssapi mutual auth" },
 127     { "help", 'h', arg_flag, &help_flag },
 128     { "version", 0, arg_flag, &version_flag }
 129 };
 130
 131 static int num_http_args = sizeof(http_args) / sizeof(http_args[0]);
 132
 133 static void
 134 usage(int code)
 135 {
 136     arg_printusage(http_args, num_http_args, NULL, "host [page]");
 137     exit(code);
 138 }
 139
 140 /*
 141  *
 142  */
 143
 144 struct http_req {
 145     char *response;
 146     char **headers;
 147     int num_headers;
 148     void *body;
 149     size_t body_size;
 150 };
 151
 152
 153 static void
 154 http_req_zero(struct http_req *req)
 155 {
 156     req->response = NULL;
 157     req->headers = NULL;
 158     req->num_headers = 0;
 159     req->body = NULL;
 160     req->body_size = 0;
 161 }
 162
 163 static void
 164 http_req_free(struct http_req *req)
 165 {
 166     int i;
 167
 168     free(req->response);
 169     for (i = 0; i < req->num_headers; i++)
 170         free(req->headers[i]);
 171     free(req->headers);
 172     free(req->body);
 173     http_req_zero(req);
 174 }
 175
 176 static const char *
 177 http_find_header(struct http_req *req, const char *header)
 178 {
 179     int i, len = strlen(header);
 180
 181     for (i = 0; i < req->num_headers; i++) {
 182         if (strncasecmp(header, req->headers[i], len) == 0) {
 183             return req->headers[i] + len + 1;
 184         }
 185     }
 186     return NULL;
 187 }
 188
 189
 190 static int
 191 http_query(const char *host, const char *page,
 192            char **headers, int num_headers, struct http_req *req)
 193 {
 194     enum { RESPONSE, HEADER, BODY } state;
 195     ssize_t ret;
 196     char in_buf[1024], *in_ptr = in_buf;
 197     size_t in_len = 0;
 198     int s, i;
 199
 200     http_req_zero(req);
 201
 202     s = do_connect(host, port_str);
 203     if (s < 0)
 204         errx(1, "connection failed");
 205
 206     fdprintf(s, "GET %s HTTP/1.0\r\n", page);
 207     for (i = 0; i < num_headers; i++)
 208         fdprintf(s, "%s\r\n", headers[i]);
 209     fdprintf(s, "Host: %s\r\n\r\n", host);
 210
 211     state = RESPONSE;
 212
 213     while (1) {
 214         ret = read (s, in_ptr, sizeof(in_buf) - in_len - 1);
 215         if (ret == 0)
 216             break;
 217         else if (ret < 0)
 218             err (1, "read: %lu", (unsigned long)ret);
 219
 220         in_buf[ret + in_len] = '\0';
 221
 222         if (state == HEADER || state == RESPONSE) {
 223             char *p;
 224
 225             in_len += ret;
 226             in_ptr += ret;
 227
 228             while (1) {
 229                 p = strstr(in_buf, "\r\n");
 230
 231                 if (p == NULL) {
 232                     break;
 233                 } else if (p == in_buf) {
 234                     memmove(in_buf, in_buf + 2, sizeof(in_buf) - 2);
 235                     state = BODY;
 236                     in_len -= 2;
 237                     in_ptr -= 2;
 238                     break;
 239                 } else if (state == RESPONSE) {
 240                     req->response = emalloc(p - in_buf + 1);
 241                     memcpy(req->response, in_buf, p - in_buf);
 242                     req->response[p - in_buf] = '\0';
 243                     state = HEADER;
 244                 } else {
 245                     req->headers = realloc(req->headers,
 246                                            (req->num_headers + 1) * sizeof(req->headers[0]));
 247                     req->headers[req->num_headers] = emalloc(p - in_buf + 1);
 248                     memcpy(req->headers[req->num_headers], in_buf, p - in_buf);
 249                     req->headers[req->num_headers][p - in_buf] = '\0';
 250                     if (req->headers[req->num_headers] == NULL)
 251                         errx(1, "strdup");
 252                     req->num_headers++;
 253                 }
 254                 memmove(in_buf, p + 2, sizeof(in_buf) - (p - in_buf) - 2);
 255                 in_len -= (p - in_buf) + 2;
 256                 in_ptr -= (p - in_buf) + 2;
 257             }
 258         }
 259
 260         if (state == BODY) {
 261
 262             req->body = erealloc(req->body, req->body_size + ret + 1);
 263
 264             memcpy((char *)req->body + req->body_size, in_buf, ret);
 265             req->body_size += ret;
 266             ((char *)req->body)[req->body_size] = '\0';
 267
 268             in_ptr = in_buf;
 269             in_len = 0;
 270         } else
 271             abort();
 272     }
 273
 274     if (verbose_flag) {
 275         int i;
 276         printf("response: %s\n", req->response);
 277         for (i = 0; i < req->num_headers; i++)
 278             printf("header[%d] %s\n", i, req->headers[i]);
 279         printf("body: %.*s\n", (int)req->body_size, (char *)req->body);
 280     }
 281
 282     close(s);
 283     return 0;
 284 }
 285
 286
 287 int
 288 main(int argc, char **argv)
 289 {
 290     struct http_req req;
 291     const char *host, *page;
 292     int i, done, print_body, gssapi_done, gssapi_started;
 293     char *headers[10]; /* XXX */
 294     int num_headers;
 295     gss_ctx_id_t context_hdl = GSS_C_NO_CONTEXT;
 296     gss_name_t server = GSS_C_NO_NAME;
 297     int optind = 0;
 298     gss_OID mech_oid;
 299     OM_uint32 flags;
 300
 301     setprogname(argv[0]);
 302
 303     if(getarg(http_args, num_http_args, argc, argv, &optind))
 304         usage(1);
 305
 306     if (help_flag)
 307         usage (0);
 308
 309     if(version_flag) {
 310         print_version(NULL);
 311         exit(0);
 312     }
 313
 314     argc -= optind;
 315     argv += optind;
 316
 317     mech_oid = select_mech(mech);
 318
 319     if (argc != 1 && argc != 2)
 320         errx(1, "usage: %s host [page]", getprogname());
 321     host = argv[0];
 322     if (argc == 2)
 323         page = argv[1];
 324     else
 325         page = "/";
 326
 327     flags = 0;
 328     if (delegate_flag)
 329         flags |= GSS_C_DELEG_FLAG;
 330     if (mutual_flag)
 331         flags |= GSS_C_MUTUAL_FLAG;
 332
 333     done = 0;
 334     num_headers = 0;
 335     gssapi_done = 1;
 336     gssapi_started = 0;
 337     do {
 338         print_body = 0;
 339
 340         http_query(host, page, headers, num_headers, &req);
 341         for (i = 0 ; i < num_headers; i++)
 342             free(headers[i]);
 343         num_headers = 0;
 344
 345         if (strstr(req.response, " 200 ") != NULL) {
 346             print_body = 1;
 347             done = 1;
 348         } else if (strstr(req.response, " 401 ") != NULL) {
 349             if (http_find_header(&req, "WWW-Authenticate:") == NULL)
 350                 errx(1, "Got %s but missed `WWW-Authenticate'", req.response);
 351             gssapi_done = 0;
 352         }
 353
 354         if (!gssapi_done) {
 355             const char *h = http_find_header(&req, "WWW-Authenticate:");
 356             if (h == NULL)
 357                 errx(1, "Got %s but missed `WWW-Authenticate'", req.response);
 358
 359             if (strncasecmp(h, "Negotiate", 9) == 0) {
 360                 OM_uint32 maj_stat, min_stat;
 361                 gss_buffer_desc input_token, output_token;
 362
 363                 if (verbose_flag)
 364                     printf("Negotiate found\n");
 365
 366                 if (server == GSS_C_NO_NAME) {
 367                     char *name;
 368                     asprintf(&name, "%s@%s", gss_service, host);
 369                     input_token.length = strlen(name);
 370                     input_token.value = name;
 371
 372                     maj_stat = gss_import_name(&min_stat,
 373                                                &input_token,
 374                                                GSS_C_NT_HOSTBASED_SERVICE,
 375                                                &server);
 376                     if (GSS_ERROR(maj_stat))
 377                         gss_err (1, min_stat, "gss_inport_name");
 378                     free(name);
 379                     input_token.length = 0;
 380                     input_token.value = NULL;
 381                 }
 382
 383                 i = 9;
 384                 while(h[i] && isspace((unsigned char)h[i]))
 385                     i++;
 386                 if (h[i] != '\0') {
 387                     int len = strlen(&h[i]);
 388                     if (len == 0)
 389                         errx(1, "invalid Negotiate token");
 390                     input_token.value = emalloc(len);
 391                     len = base64_decode(&h[i], input_token.value);
 392                     if (len < 0)
 393                         errx(1, "invalid base64 Negotiate token %s", &h[i]);
 394                     input_token.length = len;
 395                 } else {
 396                     if (gssapi_started)
 397                         errx(1, "Negotiate already started");
 398                     gssapi_started = 1;
 399
 400                     input_token.length = 0;
 401                     input_token.value = NULL;
 402                 }
 403
 404                 maj_stat =
 405                     gss_init_sec_context(&min_stat,
 406                                          GSS_C_NO_CREDENTIAL,
 407                                          &context_hdl,
 408                                          server,
 409                                          mech_oid,
 410                                          flags,
 411                                          0,
 412                                          GSS_C_NO_CHANNEL_BINDINGS,
 413                                          &input_token,
 414                                          NULL,
 415                                          &output_token,
 416                                          NULL,
 417                                          NULL);
 418                 if (GSS_ERROR(maj_stat))
 419                     gss_err (1, min_stat, "gss_init_sec_context");
 420                 else if (maj_stat & GSS_S_CONTINUE_NEEDED)
 421                     gssapi_done = 0;
 422                 else {
 423                     gss_name_t targ_name, src_name;
 424                     gss_buffer_desc name_buffer;
 425                     gss_OID mech_type;
 426
 427                     gssapi_done = 1;
 428
 429                     printf("Negotiate done: %s\n", mech);
 430
 431                     maj_stat = gss_inquire_context(&min_stat,
 432                                                    context_hdl,
 433                                                    &src_name,
 434                                                    &targ_name,
 435                                                    NULL,
 436                                                    &mech_type,
 437                                                    NULL,
 438                                                    NULL,
 439                                                    NULL);
 440                     if (GSS_ERROR(maj_stat))
 441                         gss_err (1, min_stat, "gss_inquire_context");
 442
 443                     maj_stat = gss_display_name(&min_stat,
 444                                                 src_name,
 445                                                 &name_buffer,
 446                                                 NULL);
 447                     if (GSS_ERROR(maj_stat))
 448                         gss_err (1, min_stat, "gss_display_name");
 449
 450                     printf("Source: %.*s\n",
 451                            (int)name_buffer.length,
 452                            (char *)name_buffer.value);
 453
 454                     gss_release_buffer(&min_stat, &name_buffer);
 455
 456                     maj_stat = gss_display_name(&min_stat,
 457                                                 targ_name,
 458                                                 &name_buffer,
 459                                                 NULL);
 460                     if (GSS_ERROR(maj_stat))
 461                         gss_err (1, min_stat, "gss_display_name");
 462
 463                     printf("Target: %.*s\n",
 464                            (int)name_buffer.length,
 465                            (char *)name_buffer.value);
 466
 467                     gss_release_name(&min_stat, &targ_name);
 468                     gss_release_buffer(&min_stat, &name_buffer);
 469                 }
 470
 471                 if (output_token.length) {
 472                     char *neg_token;
 473
 474                     base64_encode(output_token.value,
 475                                   output_token.length,
 476                                   &neg_token);
 477
 478                     asprintf(&headers[0], "Authorization: Negotiate %s",
 479                              neg_token);
 480
 481                     num_headers = 1;
 482                     free(neg_token);
 483                     gss_release_buffer(&min_stat, &output_token);
 484                 }
 485                 if (input_token.length)
 486                     free(input_token.value);
 487
 488             } else
 489                 done = 1;
 490         } else
 491             done = 1;
 492
 493         if (verbose_flag) {
 494             printf("%s\n\n", req.response);
 495
 496             for (i = 0; i < req.num_headers; i++)
 497                 printf("%s\n", req.headers[i]);
 498             printf("\n");
 499         }
 500         if (print_body || verbose_flag)
 501             printf("%.*s\n", (int)req.body_size, (char *)req.body);
 502
 503         http_req_free(&req);
 504     } while (!done);
 505
 506     if (gssapi_done == 0)
 507         errx(1, "gssapi not done but http dance done");
 508
 509     return 0;
 510 }