source/lib/popt_common.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Common popt routines
   4
   5    Copyright (C) Tim Potter 2001,2002
   6    Copyright (C) Jelmer Vernooij 2002,2003
   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., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 /* Handle command line options:
  26  *              -d,--debuglevel
  27  *              -s,--configfile
  28  *              -O,--socket-options
  29  *              -V,--version
  30  *              -l,--log-base
  31  *              -n,--netbios-name
  32  *              -W,--workgroup
  33  *              -i,--scope
  34  */
  35
  36 extern pstring user_socket_options;
  37 extern BOOL AllowDebugChange;
  38 extern BOOL override_logfile;
  39
  40 struct user_auth_info cmdline_auth_info;
  41
  42 static void popt_common_callback(poptContext con,
  43                            enum poptCallbackReason reason,
  44                            const struct poptOption *opt,
  45                            const char *arg, const void *data)
  46 {
  47         pstring logfile;
  48         const char *pname;
  49
  50         /* Find out basename of current program */
  51         pname = strrchr_m(poptGetInvocationName(con),'/');
  52
  53         if (!pname)
  54                 pname = poptGetInvocationName(con);
  55         else
  56                 pname++;
  57
  58         if (reason == POPT_CALLBACK_REASON_PRE) {
  59                 pstr_sprintf(logfile, "%s/log.%s", dyn_LOGFILEBASE, pname);
  60                 lp_set_logfile(logfile);
  61                 return;
  62         }
  63
  64         switch(opt->val) {
  65         case 'd':
  66                 if (arg) {
  67                         debug_parse_levels(arg);
  68                         AllowDebugChange = False;
  69                 }
  70                 break;
  71
  72         case 'V':
  73                 printf( "Version %s\n", SAMBA_VERSION_STRING);
  74                 exit(0);
  75                 break;
  76
  77         case 'O':
  78                 if (arg) {
  79                         pstrcpy(user_socket_options,arg);
  80                 }
  81                 break;
  82
  83         case 's':
  84                 if (arg) {
  85                         pstrcpy(dyn_CONFIGFILE, arg);
  86                 }
  87                 break;
  88
  89         case 'n':
  90                 if (arg) {
  91                         set_global_myname(arg);
  92                 }
  93                 break;
  94
  95         case 'l':
  96                 if (arg) {
  97                         pstr_sprintf(logfile, "%s/log.%s", arg, pname);
  98                         lp_set_logfile(logfile);
  99                         override_logfile = True;
 100                 }
 101                 break;
 102
 103         case 'i':
 104                 if (arg) {
 105                           set_global_scope(arg);
 106                 }
 107                 break;
 108
 109         case 'W':
 110                 if (arg) {
 111                         set_global_myworkgroup(arg);
 112                 }
 113                 break;
 114         }
 115 }
 116
 117 struct poptOption popt_common_connection[] = {
 118         { NULL, 0, POPT_ARG_CALLBACK, popt_common_callback },
 119         { "socket-options", 'O', POPT_ARG_STRING, NULL, 'O', "socket options to use",
 120           "SOCKETOPTIONS" },
 121         { "netbiosname", 'n', POPT_ARG_STRING, NULL, 'n', "Primary netbios name", "NETBIOSNAME" },
 122         { "workgroup", 'W', POPT_ARG_STRING, NULL, 'W', "Set the workgroup name", "WORKGROUP" },
 123         { "scope", 'i', POPT_ARG_STRING, NULL, 'i', "Use this Netbios scope", "SCOPE" },
 124
 125         POPT_TABLEEND
 126 };
 127
 128 struct poptOption popt_common_samba[] = {
 129         { NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE, popt_common_callback },
 130         { "debuglevel", 'd', POPT_ARG_STRING, NULL, 'd', "Set debug level", "DEBUGLEVEL" },
 131         { "configfile", 's', POPT_ARG_STRING, NULL, 's', "Use alternative configuration file", "CONFIGFILE" },
 132         { "log-basename", 'l', POPT_ARG_STRING, NULL, 'l', "Basename for log/debug files", "LOGFILEBASE" },
 133         { "version", 'V', POPT_ARG_NONE, NULL, 'V', "Print version" },
 134         POPT_TABLEEND
 135 };
 136
 137 struct poptOption popt_common_version[] = {
 138         { NULL, 0, POPT_ARG_CALLBACK, popt_common_callback },
 139         { "version", 'V', POPT_ARG_NONE, NULL, 'V', "Print version" },
 140         POPT_TABLEEND
 141 };
 142
 143
 144
 145 /****************************************************************************
 146  * get a password from a a file or file descriptor
 147  * exit on failure
 148  * ****************************************************************************/
 149 static void get_password_file(struct user_auth_info *a)
 150 {
 151         int fd = -1;
 152         char *p;
 153         BOOL close_it = False;
 154         pstring spec;
 155         char pass[128];
 156
 157         if ((p = getenv("PASSWD_FD")) != NULL) {
 158                 pstrcpy(spec, "descriptor ");
 159                 pstrcat(spec, p);
 160                 sscanf(p, "%d", &fd);
 161                 close_it = False;
 162         } else if ((p = getenv("PASSWD_FILE")) != NULL) {
 163                 fd = sys_open(p, O_RDONLY, 0);
 164                 pstrcpy(spec, p);
 165                 if (fd < 0) {
 166                         fprintf(stderr, "Error opening PASSWD_FILE %s: %s\n",
 167                                         spec, strerror(errno));
 168                         exit(1);
 169                 }
 170                 close_it = True;
 171         }
 172
 173         for(p = pass, *p = '\0'; /* ensure that pass is null-terminated */
 174                 p && p - pass < sizeof(pass);) {
 175                 switch (read(fd, p, 1)) {
 176                 case 1:
 177                         if (*p != '\n' && *p != '\0') {
 178                                 *++p = '\0'; /* advance p, and null-terminate pass */
 179                                 break;
 180                         }
 181                 case 0:
 182                         if (p - pass) {
 183                                 *p = '\0'; /* null-terminate it, just in case... */
 184                                 p = NULL; /* then force the loop condition to become false */
 185                                 break;
 186                         } else {
 187                                 fprintf(stderr, "Error reading password from file %s: %s\n",
 188                                                 spec, "empty password\n");
 189                                 exit(1);
 190                         }
 191
 192                 default:
 193                         fprintf(stderr, "Error reading password from file %s: %s\n",
 194                                         spec, strerror(errno));
 195                         exit(1);
 196                 }
 197         }
 198         pstrcpy(a->password, pass);
 199         if (close_it)
 200                 close(fd);
 201 }
 202
 203 static void get_credentials_file(const char *file, struct user_auth_info *info)
 204 {
 205         XFILE *auth;
 206         fstring buf;
 207         uint16 len = 0;
 208         char *ptr, *val, *param;
 209
 210         if ((auth=x_fopen(file, O_RDONLY, 0)) == NULL)
 211         {
 212                 /* fail if we can't open the credentials file */
 213                 d_printf("ERROR: Unable to open credentials file!\n");
 214                 exit(-1);
 215         }
 216
 217         while (!x_feof(auth))
 218         {
 219                 /* get a line from the file */
 220                 if (!x_fgets(buf, sizeof(buf), auth))
 221                         continue;
 222                 len = strlen(buf);
 223
 224                 if ((len) && (buf[len-1]=='\n'))
 225                 {
 226                         buf[len-1] = '\0';
 227                         len--;
 228                 }
 229                 if (len == 0)
 230                         continue;
 231
 232                 /* break up the line into parameter & value.
 233                  * will need to eat a little whitespace possibly */
 234                 param = buf;
 235                 if (!(ptr = strchr_m (buf, '=')))
 236                         continue;
 237
 238                 val = ptr+1;
 239                 *ptr = '\0';
 240
 241                 /* eat leading white space */
 242                 while ((*val!='\0') && ((*val==' ') || (*val=='\t')))
 243                         val++;
 244
 245                 if (strwicmp("password", param) == 0)
 246                 {
 247                         pstrcpy(info->password, val);
 248                         info->got_pass = True;
 249                 }
 250                 else if (strwicmp("username", param) == 0)
 251                         pstrcpy(info->username, val);
 252                 else if (strwicmp("domain", param) == 0)
 253                         set_global_myworkgroup(val);
 254                 memset(buf, 0, sizeof(buf));
 255         }
 256         x_fclose(auth);
 257 }
 258
 259 /* Handle command line options:
 260  *              -U,--user
 261  *              -A,--authentication-file
 262  *              -k,--use-kerberos
 263  *              -N,--no-pass
 264  *              -S,--signing
 265  *              -P --machine-pass
 266  */
 267
 268
 269 static void popt_common_credentials_callback(poptContext con,
 270                                         enum poptCallbackReason reason,
 271                                         const struct poptOption *opt,
 272                                         const char *arg, const void *data)
 273 {
 274         char *p;
 275
 276         if (reason == POPT_CALLBACK_REASON_PRE) {
 277                 cmdline_auth_info.use_kerberos = False;
 278                 cmdline_auth_info.got_pass = False;
 279                 cmdline_auth_info.signing_state = Undefined;
 280                 pstrcpy(cmdline_auth_info.username, "GUEST");
 281
 282                 if (getenv("LOGNAME"))pstrcpy(cmdline_auth_info.username,getenv("LOGNAME"));
 283
 284                 if (getenv("USER")) {
 285                         pstrcpy(cmdline_auth_info.username,getenv("USER"));
 286
 287                         if ((p = strchr_m(cmdline_auth_info.username,'%'))) {
 288                                 *p = 0;
 289                                 pstrcpy(cmdline_auth_info.password,p+1);
 290                                 cmdline_auth_info.got_pass = True;
 291                                 memset(strchr_m(getenv("USER"),'%')+1,'X',strlen(cmdline_auth_info.password));
 292                         }
 293                 }
 294
 295                 if (getenv("PASSWD")) {
 296                         pstrcpy(cmdline_auth_info.password,getenv("PASSWD"));
 297                         cmdline_auth_info.got_pass = True;
 298                 }
 299
 300                 if (getenv("PASSWD_FD") || getenv("PASSWD_FILE")) {
 301                         get_password_file(&cmdline_auth_info);
 302                         cmdline_auth_info.got_pass = True;
 303                 }
 304
 305                 return;
 306         }
 307
 308         switch(opt->val) {
 309         case 'U':
 310                 {
 311                         char *lp;
 312
 313                         pstrcpy(cmdline_auth_info.username,arg);
 314                         if ((lp=strchr_m(cmdline_auth_info.username,'%'))) {
 315                                 *lp = 0;
 316                                 pstrcpy(cmdline_auth_info.password,lp+1);
 317                                 cmdline_auth_info.got_pass = True;
 318                                 memset(strchr_m(arg,'%')+1,'X',strlen(cmdline_auth_info.password));
 319                         }
 320                 }
 321                 break;
 322
 323         case 'A':
 324                 get_credentials_file(arg, &cmdline_auth_info);
 325                 break;
 326
 327         case 'k':
 328 #ifndef HAVE_KRB5
 329                 d_printf("No kerberos support compiled in\n");
 330                 exit(1);
 331 #else
 332                 cmdline_auth_info.use_kerberos = True;
 333                 cmdline_auth_info.got_pass = True;
 334 #endif
 335                 break;
 336
 337         case 'S':
 338                 {
 339                         cmdline_auth_info.signing_state = -1;
 340                         if (strequal(arg, "off") || strequal(arg, "no") || strequal(arg, "false"))
 341                                 cmdline_auth_info.signing_state = False;
 342                         else if (strequal(arg, "on") || strequal(arg, "yes") || strequal(arg, "true") ||
 343                                         strequal(arg, "auto") )
 344                                 cmdline_auth_info.signing_state = True;
 345                         else if (strequal(arg, "force") || strequal(arg, "required") || strequal(arg, "forced"))
 346                                 cmdline_auth_info.signing_state = Required;
 347                         else {
 348                                 fprintf(stderr, "Unknown signing option %s\n", arg );
 349                                 exit(1);
 350                         }
 351                 }
 352                 break;
 353         case 'P':
 354                 {
 355                         char *opt_password = NULL;
 356                         /* it is very useful to be able to make ads queries as the
 357                            machine account for testing purposes and for domain leave */
 358
 359                         if (!secrets_init()) {
 360                                 d_printf("ERROR: Unable to open secrets database\n");
 361                                 exit(1);
 362                         }
 363
 364                         opt_password = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
 365
 366                         if (!opt_password) {
 367                                 d_printf("ERROR: Unable to fetch machine password\n");
 368                                 exit(1);
 369                         }
 370                         pstr_sprintf(cmdline_auth_info.username, "%s$",
 371                                      global_myname());
 372                         pstrcpy(cmdline_auth_info.password,opt_password);
 373                         SAFE_FREE(opt_password);
 374
 375                         /* machine accounts only work with kerberos */
 376                         cmdline_auth_info.use_kerberos = True;
 377                         cmdline_auth_info.got_pass = True;
 378                 }
 379                 break;
 380         }
 381 }
 382
 383
 384
 385 struct poptOption popt_common_credentials[] = {
 386         { NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE, popt_common_credentials_callback },
 387         { "user", 'U', POPT_ARG_STRING, NULL, 'U', "Set the network username", "USERNAME" },
 388         { "no-pass", 'N', POPT_ARG_NONE, &cmdline_auth_info.got_pass, 0, "Don't ask for a password" },
 389         { "kerberos", 'k', POPT_ARG_NONE, &cmdline_auth_info.use_kerberos, 'k', "Use kerberos (active directory) authentication" },
 390         { "authentication-file", 'A', POPT_ARG_STRING, NULL, 'A', "Get the credentials from a file", "FILE" },
 391         { "signing", 'S', POPT_ARG_STRING, NULL, 'S', "Set the client signing state", "on|off|required" },
 392         {"machine-pass", 'P', POPT_ARG_NONE, NULL, 'P', "Use stored machine account password" },
 393         POPT_TABLEEND
 394 };