helpers/negotiate_auth/kerberos/negotiate_kerberos_auth_test.cc

   1 /*
   2  * -----------------------------------------------------------------------------
   3  *
   4  * Author: Markus Moeller (markus_moeller at compuserve.com)
   5  *
   6  * Copyright (C) 2007 Markus Moeller. All rights reserved.
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
  21  *
  22  * -----------------------------------------------------------------------------
  23  */
  24 /*
  25  * Hosted at http://sourceforge.net/projects/squidkerbauth
  26  */
  27
  28 #include "config.h"
  29
  30 #if HAVE_GSSAPI
  31
  32 #if HAVE_STRING_H
  33 #include <string.h>
  34 #endif
  35 #if HAVE_STDIO_H
  36 #include <stdio.h>
  37 #endif
  38 #if HAVE_STDLIB_H
  39 #include <stdlib.h>
  40 #endif
  41 #if HAVE_NETDB_H
  42 #include <netdb.h>
  43 #endif
  44 #if HAVE_UNISTD_H
  45 #include <unistd.h>
  46 #endif
  47 #if HAVE_TIME_H
  48 #include <time.h>
  49 #endif
  50 #if HAVE_SYS_TIME_H
  51 #include <sys/time.h>
  52 #endif
  53 #if HAVE_ERRNO_H
  54 #include <errno.h>
  55 #endif
  56
  57 #include "base64.h"
  58 #include "util.h"
  59
  60 #if HAVE_HEIMDAL_KERBEROS
  61 #if HAVE_GSSAPI_GSSAPI_H
  62 #include <gssapi/gssapi.h>
  63 #elif HAVE_GSSAPI_H
  64 #include <gssapi.h>
  65 #endif /* HAVE_GSSAPI_GSSAPI_H */
  66 #define gss_nt_service_name GSS_C_NT_HOSTBASED_SERVICE
  67 #else /* HAVE_HEIMDAL_KERBEROS */
  68 #if HAVE_GSSAPI_GSSAPI_H
  69 #include <gssapi/gssapi.h>
  70 #elif HAVE_GSSAPI_H
  71 #include <gssapi.h>
  72 #endif /* HAVE_GSSAPI_GSSAPI_H */
  73 #if HAVE_GSSAPI_GSSAPI_KRB5_H
  74 #include <gssapi/gssapi_krb5.h>
  75 #endif /* HAVE_GSSAPI_GSSAPI_KRB5_H */
  76 #if HAVE_GSSAPI_GSSAPI_GENERIC_H
  77 #include <gssapi/gssapi_generic.h>
  78 #endif /* HAVE_GSSAPI_GSSAPI_GENERIC_H */
  79 #endif /* HAVE_HEIMDAL_KERBEROS */
  80
  81 static const char *LogTime(void);
  82
  83 int check_gss_err(OM_uint32 major_status, OM_uint32 minor_status,
  84     const char *function);
  85
  86 const char *squid_kerb_proxy_auth(char *proxy);
  87
  88 #define PROGRAM "negotiate_kerberos_auth_test"
  89
  90 static const char *
  91 LogTime()
  92 {
  93     struct tm *tm;
  94     struct timeval now;
  95     static time_t last_t = 0;
  96     static char buf[128];
  97
  98     gettimeofday(&now, NULL);
  99     if (now.tv_sec != last_t) {
 100         tm = localtime(&now.tv_sec);
 101         strftime(buf, 127, "%Y/%m/%d %H:%M:%S", tm);
 102         last_t = now.tv_sec;
 103     }
 104     return buf;
 105 }
 106
 107 #ifdef HAVE_SPNEGO
 108 #ifndef gss_mech_spnego
 109 static gss_OID_desc _gss_mech_spnego =
 110     { 6, (void *) "\x2b\x06\x01\x05\x05\x02" };
 111 gss_OID gss_mech_spnego = &_gss_mech_spnego;
 112 #endif
 113 #endif
 114
 115 int
 116 check_gss_err(OM_uint32 major_status, OM_uint32 minor_status,
 117     const char *function)
 118 {
 119     if (GSS_ERROR(major_status)) {
 120         OM_uint32 maj_stat, min_stat;
 121         OM_uint32 msg_ctx = 0;
 122         gss_buffer_desc status_string;
 123         char buf[1024];
 124         size_t len;
 125
 126         len = 0;
 127         msg_ctx = 0;
 128         while (!msg_ctx) {
 129             /* convert major status code (GSS-API error) to text */
 130             maj_stat = gss_display_status(&min_stat, major_status,
 131                 GSS_C_GSS_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string);
 132             if (maj_stat == GSS_S_COMPLETE) {
 133                 if (sizeof(buf) > len + status_string.length + 1) {
 134                     sprintf(buf + len, "%s", (char *) status_string.value);
 135                     len += status_string.length;
 136                 }
 137                 gss_release_buffer(&min_stat, &status_string);
 138                 break;
 139             }
 140             gss_release_buffer(&min_stat, &status_string);
 141         }
 142         if (sizeof(buf) > len + 2) {
 143             sprintf(buf + len, "%s", ". ");
 144             len += 2;
 145         }
 146         msg_ctx = 0;
 147         while (!msg_ctx) {
 148             /* convert minor status code (underlying routine error) to text */
 149             maj_stat = gss_display_status(&min_stat, minor_status,
 150                 GSS_C_MECH_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string);
 151             if (maj_stat == GSS_S_COMPLETE) {
 152                 if (sizeof(buf) > len + status_string.length) {
 153                     sprintf(buf + len, "%s", (char *) status_string.value);
 154                     len += status_string.length;
 155                 }
 156                 gss_release_buffer(&min_stat, &status_string);
 157                 break;
 158             }
 159             gss_release_buffer(&min_stat, &status_string);
 160         }
 161         fprintf(stderr, "%s| %s: %s failed: %s\n", LogTime(), PROGRAM, function,
 162             buf);
 163         return (1);
 164     }
 165     return (0);
 166 }
 167
 168 const char *
 169 squid_kerb_proxy_auth(char *proxy)
 170 {
 171     OM_uint32 major_status, minor_status;
 172     gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT;
 173     gss_name_t server_name = GSS_C_NO_NAME;
 174     gss_buffer_desc service = GSS_C_EMPTY_BUFFER;
 175     gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
 176     gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
 177     char *token = NULL;
 178
 179     setbuf(stdout, NULL);
 180     setbuf(stdin, NULL);
 181
 182     if (!proxy) {
 183         fprintf(stderr, "%s| %s: Error: No proxy server name\n", LogTime(),
 184             PROGRAM);
 185         return NULL;
 186     }
 187
 188     service.value = xmalloc(strlen("HTTP") + strlen(proxy) + 2);
 189     snprintf((char*)service.value, strlen("HTTP") + strlen(proxy) + 2, "%s@%s", "HTTP", proxy);
 190     service.length = strlen((char *) service.value);
 191
 192     major_status = gss_import_name(&minor_status, &service,
 193         gss_nt_service_name, &server_name);
 194
 195     if (check_gss_err(major_status, minor_status, "gss_import_name()"))
 196         goto cleanup;
 197
 198     major_status = gss_init_sec_context(&minor_status,
 199         GSS_C_NO_CREDENTIAL, &gss_context, server_name,
 200 #ifdef HAVE_SPNEGO
 201         gss_mech_spnego,
 202 #else
 203         0,
 204 #endif
 205         0,
 206         0,
 207         GSS_C_NO_CHANNEL_BINDINGS,
 208         &input_token, NULL, &output_token, NULL, NULL);
 209
 210     if (check_gss_err(major_status, minor_status, "gss_init_sec_context()"))
 211         goto cleanup;
 212
 213     if (output_token.length) {
 214         token = (char*)xmalloc(ska_base64_encode_len(output_token.length));
 215         ska_base64_encode(token, (const char *) output_token.value,
 216             ska_base64_encode_len(output_token.length), output_token.length);
 217     }
 218
 219
 220   cleanup:
 221     gss_delete_sec_context(&minor_status, &gss_context, NULL);
 222     gss_release_buffer(&minor_status, &service);
 223     gss_release_buffer(&minor_status, &input_token);
 224     gss_release_buffer(&minor_status, &output_token);
 225     gss_release_name(&minor_status, &server_name);
 226
 227     return token;
 228 }
 229
 230 int
 231 main(int argc, char *argv[])
 232 {
 233
 234     const char *Token;
 235     int count;
 236
 237     if (argc < 2) {
 238         fprintf(stderr, "%s| %s: Error: No proxy server name given\n",
 239             LogTime(), PROGRAM);
 240         exit(99);
 241     }
 242     if (argc == 3) {
 243         count = atoi(argv[2]);
 244         while (count > 0) {
 245             Token = (const char *) squid_kerb_proxy_auth(argv[1]);
 246             fprintf(stdout, "YR %s\n", Token ? Token : "NULL");
 247             count--;
 248         }
 249         fprintf(stdout, "QQ\n");
 250     } else {
 251         Token = (const char *) squid_kerb_proxy_auth(argv[1]);
 252         fprintf(stdout, "Token: %s\n", Token ? Token : "NULL");
 253     }
 254
 255     exit(0);
 256 }
 257 #else
 258 #include <stdlib.h>
 259 int
 260 main(int argc, char *argv[])
 261 {
 262   exit(-1);
 263 }
 264 #endif /* HAVE_GSSAPI */