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_NETDB_H
  39 #include <netdb.h>
  40 #endif
  41 #if HAVE_UNISTD_H
  42 #include <unistd.h>
  43 #endif
  44 #if HAVE_TIME_H
  45 #include <time.h>
  46 #endif
  47 #if HAVE_ERRNO_H
  48 #include <errno.h>
  49 #endif
  50
  51 #include "base64.h"
  52 #include "util.h"
  53
  54 #if HAVE_GSSAPI_GSSAPI_H
  55 #include <gssapi/gssapi.h>
  56 #elif HAVE_GSSAPI_H
  57 #include <gssapi.h>
  58 #endif /* HAVE_GSSAPI_GSSAPI_H */
  59 #if HAVE_GSSAPI_GSSAPI_KRB5_H
  60 #include <gssapi/gssapi_krb5.h>
  61 #endif /* HAVE_GSSAPI_GSSAPI_KRB5_H */
  62 #if HAVE_GSSAPI_GSSAPI_GENERIC_H
  63 #include <gssapi/gssapi_generic.h>
  64 #endif /* HAVE_GSSAPI_GSSAPI_GENERIC_H */
  65 #ifndef gss_nt_service_name
  66 #define gss_nt_service_name GSS_C_NT_HOSTBASED_SERVICE
  67 #endif
  68
  69 static const char *LogTime(void);
  70
  71 int check_gss_err(OM_uint32 major_status, OM_uint32 minor_status,
  72                   const char *function);
  73
  74 const char *squid_kerb_proxy_auth(char *proxy);
  75
  76 #define PROGRAM "negotiate_kerberos_auth_test"
  77
  78 static const char *
  79 LogTime()
  80 {
  81     struct tm *tm;
  82     struct timeval now;
  83     static time_t last_t = 0;
  84     static char buf[128];
  85
  86     gettimeofday(&now, NULL);
  87     if (now.tv_sec != last_t) {
  88         tm = localtime((const time_t *) &now.tv_sec);
  89         strftime(buf, 127, "%Y/%m/%d %H:%M:%S", tm);
  90         last_t = now.tv_sec;
  91     }
  92     return buf;
  93 }
  94
  95 #ifndef gss_mech_spnego
  96 static gss_OID_desc _gss_mech_spnego = {6, (void *) "\x2b\x06\x01\x05\x05\x02"};
  97 gss_OID gss_mech_spnego = &_gss_mech_spnego;
  98 #endif
  99
 100 int
 101 check_gss_err(OM_uint32 major_status, OM_uint32 minor_status,
 102               const char *function)
 103 {
 104     if (GSS_ERROR(major_status)) {
 105         OM_uint32 maj_stat, min_stat;
 106         OM_uint32 msg_ctx = 0;
 107         gss_buffer_desc status_string;
 108         char buf[1024];
 109         size_t len;
 110
 111         len = 0;
 112         msg_ctx = 0;
 113         while (!msg_ctx) {
 114             /* convert major status code (GSS-API error) to text */
 115             maj_stat = gss_display_status(&min_stat, major_status,
 116                                           GSS_C_GSS_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string);
 117             if (maj_stat == GSS_S_COMPLETE) {
 118                 if (sizeof(buf) > len + status_string.length + 1) {
 119                     snprintf(buf + len, (sizeof(buf) - len), "%s", (char *) status_string.value);
 120                     len += status_string.length;
 121                 }
 122                 gss_release_buffer(&min_stat, &status_string);
 123                 break;
 124             }
 125             gss_release_buffer(&min_stat, &status_string);
 126         }
 127         if (sizeof(buf) > len + 2) {
 128             snprintf(buf + len, (sizeof(buf) - len), "%s", ". ");
 129             len += 2;
 130         }
 131         msg_ctx = 0;
 132         while (!msg_ctx) {
 133             /* convert minor status code (underlying routine error) to text */
 134             maj_stat = gss_display_status(&min_stat, minor_status,
 135                                           GSS_C_MECH_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string);
 136             if (maj_stat == GSS_S_COMPLETE) {
 137                 if (sizeof(buf) > len + status_string.length) {
 138                     snprintf(buf + len, (sizeof(buf) - len), "%s", (char *) status_string.value);
 139                     len += status_string.length;
 140                 }
 141                 gss_release_buffer(&min_stat, &status_string);
 142                 break;
 143             }
 144             gss_release_buffer(&min_stat, &status_string);
 145         }
 146         fprintf(stderr, "%s| %s: %s failed: %s\n", LogTime(), PROGRAM, function,
 147                 buf);
 148         return (1);
 149     }
 150     return (0);
 151 }
 152
 153 const char *
 154 squid_kerb_proxy_auth(char *proxy)
 155 {
 156     OM_uint32 major_status, minor_status;
 157     gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT;
 158     gss_name_t server_name = GSS_C_NO_NAME;
 159     gss_buffer_desc service = GSS_C_EMPTY_BUFFER;
 160     gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
 161     gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
 162     char *token = NULL;
 163
 164     setbuf(stdout, NULL);
 165     setbuf(stdin, NULL);
 166
 167     if (!proxy) {
 168         fprintf(stderr, "%s| %s: Error: No proxy server name\n", LogTime(),
 169                 PROGRAM);
 170         return NULL;
 171     }
 172     service.value = xmalloc(strlen("HTTP") + strlen(proxy) + 2);
 173     snprintf((char *) service.value, strlen("HTTP") + strlen(proxy) + 2, "%s@%s", "HTTP", proxy);
 174     service.length = strlen((char *) service.value);
 175
 176     major_status = gss_import_name(&minor_status, &service,
 177                                    gss_nt_service_name, &server_name);
 178
 179     if (check_gss_err(major_status, minor_status, "gss_import_name()"))
 180         goto cleanup;
 181
 182     major_status = gss_init_sec_context(&minor_status,
 183                                         GSS_C_NO_CREDENTIAL, &gss_context, server_name,
 184                                         gss_mech_spnego,
 185                                         0,
 186                                         0,
 187                                         GSS_C_NO_CHANNEL_BINDINGS,
 188                                         &input_token, NULL, &output_token, NULL, NULL);
 189
 190     if (check_gss_err(major_status, minor_status, "gss_init_sec_context()"))
 191         goto cleanup;
 192
 193     if (output_token.length) {
 194         token = (char *) xmalloc(ska_base64_encode_len(output_token.length));
 195         ska_base64_encode(token, (const char *) output_token.value,
 196                           ska_base64_encode_len(output_token.length), output_token.length);
 197     }
 198 cleanup:
 199     gss_delete_sec_context(&minor_status, &gss_context, NULL);
 200     gss_release_buffer(&minor_status, &service);
 201     gss_release_buffer(&minor_status, &input_token);
 202     gss_release_buffer(&minor_status, &output_token);
 203     gss_release_name(&minor_status, &server_name);
 204
 205     return token;
 206 }
 207
 208 int
 209 main(int argc, char *argv[])
 210 {
 211
 212     const char *Token;
 213     int count;
 214
 215     if (argc < 2) {
 216         fprintf(stderr, "%s| %s: Error: No proxy server name given\n",
 217                 LogTime(), PROGRAM);
 218         exit(99);
 219     }
 220     if (argc == 3) {
 221         count = atoi(argv[2]);
 222         while (count > 0) {
 223             Token = (const char *) squid_kerb_proxy_auth(argv[1]);
 224             fprintf(stdout, "YR %s\n", Token ? Token : "NULL");
 225             count--;
 226         }
 227         fprintf(stdout, "QQ\n");
 228     } else {
 229         Token = (const char *) squid_kerb_proxy_auth(argv[1]);
 230         fprintf(stdout, "Token: %s\n", Token ? Token : "NULL");
 231     }
 232
 233     exit(0);
 234 }
 235
 236 #else
 237 #include <stdlib.h>
 238 int
 239 main(int argc, char *argv[])
 240 {
 241     exit(-1);
 242 }
 243
 244 #endif /* HAVE_GSSAPI */