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_GSSAPI_GSSAPI_H
  61 #include <gssapi/gssapi.h>
  62 #elif HAVE_GSSAPI_H
  63 #include <gssapi.h>
  64 #endif /* HAVE_GSSAPI_GSSAPI_H */
  65 #if HAVE_GSSAPI_GSSAPI_KRB5_H
  66 #include <gssapi/gssapi_krb5.h>
  67 #endif /* HAVE_GSSAPI_GSSAPI_KRB5_H */
  68 #if HAVE_GSSAPI_GSSAPI_GENERIC_H
  69 #include <gssapi/gssapi_generic.h>
  70 #endif /* HAVE_GSSAPI_GSSAPI_GENERIC_H */
  71 #ifndef gss_nt_service_name
  72 #define gss_nt_service_name GSS_C_NT_HOSTBASED_SERVICE
  73 #endif
  74
  75 static const char *LogTime(void);
  76
  77 int check_gss_err(OM_uint32 major_status, OM_uint32 minor_status,
  78                   const char *function);
  79
  80 const char *squid_kerb_proxy_auth(char *proxy);
  81
  82 #define PROGRAM "negotiate_kerberos_auth_test"
  83
  84 static const char *
  85 LogTime()
  86 {
  87     struct tm *tm;
  88     struct timeval now;
  89     static time_t last_t = 0;
  90     static char buf[128];
  91
  92     gettimeofday(&now, NULL);
  93     if (now.tv_sec != last_t) {
  94         tm = localtime((const time_t*)&now.tv_sec);
  95         strftime(buf, 127, "%Y/%m/%d %H:%M:%S", tm);
  96         last_t = now.tv_sec;
  97     }
  98     return buf;
  99 }
 100
 101 #ifndef gss_mech_spnego
 102 static gss_OID_desc _gss_mech_spnego = { 6, (void *) "\x2b\x06\x01\x05\x05\x02" };
 103 gss_OID gss_mech_spnego = &_gss_mech_spnego;
 104 #endif
 105
 106 int
 107 check_gss_err(OM_uint32 major_status, OM_uint32 minor_status,
 108               const char *function)
 109 {
 110     if (GSS_ERROR(major_status)) {
 111         OM_uint32 maj_stat, min_stat;
 112         OM_uint32 msg_ctx = 0;
 113         gss_buffer_desc status_string;
 114         char buf[1024];
 115         size_t len;
 116
 117         len = 0;
 118         msg_ctx = 0;
 119         while (!msg_ctx) {
 120             /* convert major status code (GSS-API error) to text */
 121             maj_stat = gss_display_status(&min_stat, major_status,
 122                                           GSS_C_GSS_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string);
 123             if (maj_stat == GSS_S_COMPLETE) {
 124                 if (sizeof(buf) > len + status_string.length + 1) {
 125                     sprintf(buf + len, "%s", (char *) status_string.value);
 126                     len += status_string.length;
 127                 }
 128                 gss_release_buffer(&min_stat, &status_string);
 129                 break;
 130             }
 131             gss_release_buffer(&min_stat, &status_string);
 132         }
 133         if (sizeof(buf) > len + 2) {
 134             sprintf(buf + len, "%s", ". ");
 135             len += 2;
 136         }
 137         msg_ctx = 0;
 138         while (!msg_ctx) {
 139             /* convert minor status code (underlying routine error) to text */
 140             maj_stat = gss_display_status(&min_stat, minor_status,
 141                                           GSS_C_MECH_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string);
 142             if (maj_stat == GSS_S_COMPLETE) {
 143                 if (sizeof(buf) > len + status_string.length) {
 144                     sprintf(buf + len, "%s", (char *) status_string.value);
 145                     len += status_string.length;
 146                 }
 147                 gss_release_buffer(&min_stat, &status_string);
 148                 break;
 149             }
 150             gss_release_buffer(&min_stat, &status_string);
 151         }
 152         fprintf(stderr, "%s| %s: %s failed: %s\n", LogTime(), PROGRAM, function,
 153                 buf);
 154         return (1);
 155     }
 156     return (0);
 157 }
 158
 159 const char *
 160 squid_kerb_proxy_auth(char *proxy)
 161 {
 162     OM_uint32 major_status, minor_status;
 163     gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT;
 164     gss_name_t server_name = GSS_C_NO_NAME;
 165     gss_buffer_desc service = GSS_C_EMPTY_BUFFER;
 166     gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
 167     gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
 168     char *token = NULL;
 169
 170     setbuf(stdout, NULL);
 171     setbuf(stdin, NULL);
 172
 173     if (!proxy) {
 174         fprintf(stderr, "%s| %s: Error: No proxy server name\n", LogTime(),
 175                 PROGRAM);
 176         return NULL;
 177     }
 178
 179     service.value = xmalloc(strlen("HTTP") + strlen(proxy) + 2);
 180     snprintf((char*)service.value, strlen("HTTP") + strlen(proxy) + 2, "%s@%s", "HTTP", proxy);
 181     service.length = strlen((char *) service.value);
 182
 183     major_status = gss_import_name(&minor_status, &service,
 184                                    gss_nt_service_name, &server_name);
 185
 186     if (check_gss_err(major_status, minor_status, "gss_import_name()"))
 187         goto cleanup;
 188
 189     major_status = gss_init_sec_context(&minor_status,
 190                                         GSS_C_NO_CREDENTIAL, &gss_context, server_name,
 191                                         gss_mech_spnego,
 192                                         0,
 193                                         0,
 194                                         GSS_C_NO_CHANNEL_BINDINGS,
 195                                         &input_token, NULL, &output_token, NULL, NULL);
 196
 197     if (check_gss_err(major_status, minor_status, "gss_init_sec_context()"))
 198         goto cleanup;
 199
 200     if (output_token.length) {
 201         token = (char*)xmalloc(ska_base64_encode_len(output_token.length));
 202         ska_base64_encode(token, (const char *) output_token.value,
 203                           ska_base64_encode_len(output_token.length), output_token.length);
 204     }
 205
 206
 207 cleanup:
 208     gss_delete_sec_context(&minor_status, &gss_context, NULL);
 209     gss_release_buffer(&minor_status, &service);
 210     gss_release_buffer(&minor_status, &input_token);
 211     gss_release_buffer(&minor_status, &output_token);
 212     gss_release_name(&minor_status, &server_name);
 213
 214     return token;
 215 }
 216
 217 int
 218 main(int argc, char *argv[])
 219 {
 220
 221     const char *Token;
 222     int count;
 223
 224     if (argc < 2) {
 225         fprintf(stderr, "%s| %s: Error: No proxy server name given\n",
 226                 LogTime(), PROGRAM);
 227         exit(99);
 228     }
 229     if (argc == 3) {
 230         count = atoi(argv[2]);
 231         while (count > 0) {
 232             Token = (const char *) squid_kerb_proxy_auth(argv[1]);
 233             fprintf(stdout, "YR %s\n", Token ? Token : "NULL");
 234             count--;
 235         }
 236         fprintf(stdout, "QQ\n");
 237     } else {
 238         Token = (const char *) squid_kerb_proxy_auth(argv[1]);
 239         fprintf(stdout, "Token: %s\n", Token ? Token : "NULL");
 240     }
 241
 242     exit(0);
 243 }
 244 #else
 245 #include <stdlib.h>
 246 int
 247 main(int argc, char *argv[])
 248 {
 249     exit(-1);
 250 }
 251 #endif /* HAVE_GSSAPI */