release/src/router/vsftpd/parseconf.c

   1 /*
   2  * Part of Very Secure FTPd
   3  * Licence: GPL v2
   4  * Author: Chris Evans
   5  * parseconf.c
   6  *
   7  * Routines and support to load in a file full of tunable variables and
   8  * settings, populating corresponding runtime variables.
   9  */
  10
  11 #include "parseconf.h"
  12 #include "tunables.h"
  13 #include "str.h"
  14 #include "filestr.h"
  15 #include "defs.h"
  16 #include "sysutil.h"
  17 #include "utility.h"
  18
  19 static const char* s_p_saved_filename;
  20 static int s_strings_copied;
  21
  22 /* File local functions */
  23 static void handle_config_setting(struct mystr* p_setting_str,
  24                                   struct mystr* p_value_str,
  25                                   int errs_fatal);
  26
  27 static void copy_string_settings(void);
  28
  29 /* Tables mapping setting names to runtime variables */
  30 /* Boolean settings */
  31 static struct parseconf_bool_setting
  32 {
  33   const char* p_setting_name;
  34   int* p_variable;
  35 }
  36 parseconf_bool_array[] =
  37 {
  38   { "anonymous_enable", &tunable_anonymous_enable },
  39   { "local_enable", &tunable_local_enable },
  40   { "pasv_enable", &tunable_pasv_enable },
  41   { "port_enable", &tunable_port_enable },
  42   { "chroot_local_user", &tunable_chroot_local_user },
  43   { "write_enable", &tunable_write_enable },
  44   { "anon_upload_enable", &tunable_anon_upload_enable },
  45   { "anon_mkdir_write_enable", &tunable_anon_mkdir_write_enable },
  46   { "anon_other_write_enable", &tunable_anon_other_write_enable },
  47   { "chown_uploads", &tunable_chown_uploads },
  48   { "connect_from_port_20", &tunable_connect_from_port_20 },
  49   { "xferlog_enable", &tunable_xferlog_enable },
  50   { "dirmessage_enable", &tunable_dirmessage_enable },
  51   { "anon_world_readable_only", &tunable_anon_world_readable_only },
  52   { "async_abor_enable", &tunable_async_abor_enable },
  53   { "ascii_upload_enable", &tunable_ascii_upload_enable },
  54   { "ascii_download_enable", &tunable_ascii_download_enable },
  55   { "one_process_model", &tunable_one_process_model },
  56   { "xferlog_std_format", &tunable_xferlog_std_format },
  57   { "pasv_promiscuous", &tunable_pasv_promiscuous },
  58   { "deny_email_enable", &tunable_deny_email_enable },
  59   { "chroot_list_enable", &tunable_chroot_list_enable },
  60   { "setproctitle_enable", &tunable_setproctitle_enable },
  61   { "text_userdb_names", &tunable_text_userdb_names },
  62   { "ls_recurse_enable", &tunable_ls_recurse_enable },
  63   { "log_ftp_protocol", &tunable_log_ftp_protocol },
  64   { "guest_enable", &tunable_guest_enable },
  65   { "userlist_enable", &tunable_userlist_enable },
  66   { "userlist_deny", &tunable_userlist_deny },
  67   { "use_localtime", &tunable_use_localtime },
  68   { "check_shell", &tunable_check_shell },
  69   { "hide_ids", &tunable_hide_ids },
  70   { "listen", &tunable_listen },
  71   { "port_promiscuous", &tunable_port_promiscuous },
  72   { "passwd_chroot_enable", &tunable_passwd_chroot_enable },
  73   { "no_anon_password", &tunable_no_anon_password },
  74   { "tcp_wrappers", &tunable_tcp_wrappers },
  75   { "use_sendfile", &tunable_use_sendfile },
  76   { "force_dot_files", &tunable_force_dot_files },
  77   { "listen_ipv6", &tunable_listen_ipv6 },
  78   { "dual_log_enable", &tunable_dual_log_enable },
  79   { "syslog_enable", &tunable_syslog_enable },
  80   { "background", &tunable_background },
  81   { "virtual_use_local_privs", &tunable_virtual_use_local_privs },
  82   { "session_support", &tunable_session_support },
  83   { "download_enable", &tunable_download_enable },
  84   { "dirlist_enable", &tunable_dirlist_enable },
  85   { "chmod_enable", &tunable_chmod_enable },
  86   { "secure_email_list_enable", &tunable_secure_email_list_enable },
  87   { "run_as_launching_user", &tunable_run_as_launching_user },
  88   { "no_log_lock", &tunable_no_log_lock },
  89   { "ssl_enable", &tunable_ssl_enable },
  90   { "allow_anon_ssl", &tunable_allow_anon_ssl },
  91   { "force_local_logins_ssl", &tunable_force_local_logins_ssl },
  92   { "force_local_data_ssl", &tunable_force_local_data_ssl },
  93   { "ssl_sslv2", &tunable_sslv2 },
  94   { "ssl_sslv3", &tunable_sslv3 },
  95   { "ssl_tlsv1", &tunable_tlsv1 },
  96   { "tilde_user_enable", &tunable_tilde_user_enable },
  97   { "force_anon_logins_ssl", &tunable_force_anon_logins_ssl },
  98   { "force_anon_data_ssl", &tunable_force_anon_data_ssl },
  99   { "mdtm_write", &tunable_mdtm_write },
 100   { "lock_upload_files", &tunable_lock_upload_files },
 101   { "pasv_addr_resolve", &tunable_pasv_addr_resolve },
 102   { "debug_ssl", &tunable_debug_ssl },
 103   { "require_cert", &tunable_require_cert },
 104   { "validate_cert", &tunable_validate_cert },
 105   { "strict_ssl_read_eof", &tunable_strict_ssl_read_eof },
 106   { "strict_ssl_write_shutdown", &tunable_strict_ssl_write_shutdown },
 107   { "ssl_request_cert", &tunable_ssl_request_cert },
 108   { "delete_failed_uploads", &tunable_delete_failed_uploads },
 109   { 0, 0 }
 110 };
 111
 112 static struct parseconf_uint_setting
 113 {
 114   const char* p_setting_name;
 115   unsigned int* p_variable;
 116 }
 117 parseconf_uint_array[] =
 118 {
 119   { "accept_timeout", &tunable_accept_timeout },
 120   { "connect_timeout", &tunable_connect_timeout },
 121   { "local_umask", &tunable_local_umask },
 122   { "anon_umask", &tunable_anon_umask },
 123   { "ftp_data_port", &tunable_ftp_data_port },
 124   { "idle_session_timeout", &tunable_idle_session_timeout },
 125   { "data_connection_timeout", &tunable_data_connection_timeout },
 126   { "pasv_min_port", &tunable_pasv_min_port },
 127   { "pasv_max_port", &tunable_pasv_max_port },
 128   { "anon_max_rate", &tunable_anon_max_rate },
 129   { "local_max_rate", &tunable_local_max_rate },
 130   { "listen_port", &tunable_listen_port },
 131   { "max_clients", &tunable_max_clients },
 132   { "file_open_mode", &tunable_file_open_mode },
 133   { "max_per_ip", &tunable_max_per_ip },
 134   { "trans_chunk_size", &tunable_trans_chunk_size },
 135   { "delay_failed_login", &tunable_delay_failed_login },
 136   { "delay_successful_login", &tunable_delay_successful_login },
 137   { "max_login_fails", &tunable_max_login_fails },
 138   { "chown_upload_mode", &tunable_chown_upload_mode },
 139   { 0, 0 }
 140 };
 141
 142 static struct parseconf_str_setting
 143 {
 144   const char* p_setting_name;
 145   const char** p_variable;
 146 }
 147 parseconf_str_array[] =
 148 {
 149   { "secure_chroot_dir", &tunable_secure_chroot_dir },
 150   { "ftp_username", &tunable_ftp_username },
 151   { "chown_username", &tunable_chown_username },
 152   { "xferlog_file", &tunable_xferlog_file },
 153   { "vsftpd_log_file", &tunable_vsftpd_log_file },
 154   { "message_file", &tunable_message_file },
 155   { "nopriv_user", &tunable_nopriv_user },
 156   { "ftpd_banner", &tunable_ftpd_banner },
 157   { "banned_email_file", &tunable_banned_email_file },
 158   { "chroot_list_file", &tunable_chroot_list_file },
 159   { "pam_service_name", &tunable_pam_service_name },
 160   { "guest_username", &tunable_guest_username },
 161   { "userlist_file", &tunable_userlist_file },
 162   { "anon_root", &tunable_anon_root },
 163   { "local_root", &tunable_local_root },
 164   { "banner_file", &tunable_banner_file },
 165   { "pasv_address", &tunable_pasv_address },
 166   { "listen_address", &tunable_listen_address },
 167   { "user_config_dir", &tunable_user_config_dir },
 168   { "listen_address6", &tunable_listen_address6 },
 169   { "cmds_allowed", &tunable_cmds_allowed },
 170   { "hide_file", &tunable_hide_file },
 171   { "deny_file", &tunable_deny_file },
 172   { "user_sub_token", &tunable_user_sub_token },
 173   { "email_password_file", &tunable_email_password_file },
 174   { "rsa_cert_file", &tunable_rsa_cert_file },
 175   { "dsa_cert_file", &tunable_dsa_cert_file },
 176   { "ssl_ciphers", &tunable_ssl_ciphers },
 177   { "rsa_private_key_file", &tunable_rsa_private_key_file },
 178   { "dsa_private_key_file", &tunable_dsa_private_key_file },
 179   { "ca_certs_file", &tunable_ca_certs_file },
 180   { 0, 0 }
 181 };
 182
 183 void
 184 vsf_parseconf_load_file(const char* p_filename, int errs_fatal)
 185 {
 186   struct mystr config_file_str = INIT_MYSTR;
 187   struct mystr config_setting_str = INIT_MYSTR;
 188   struct mystr config_value_str = INIT_MYSTR;
 189   unsigned int str_pos = 0;
 190   int retval;
 191   if (!p_filename)
 192   {
 193     p_filename = s_p_saved_filename;
 194   }
 195   else
 196   {
 197     if (s_p_saved_filename)
 198     {
 199       vsf_sysutil_free((char*)s_p_saved_filename);
 200     }
 201     s_p_saved_filename = vsf_sysutil_strdup(p_filename);
 202   }
 203   if (!p_filename)
 204   {
 205     bug("null filename in vsf_parseconf_load_file");
 206   }
 207   if (!s_strings_copied)
 208   {
 209     s_strings_copied = 1;
 210     /* A minor hack to make sure all strings are malloc()'ed so we can free
 211      * them at some later date. Specifically handles strings embedded in the
 212      * binary.
 213      */
 214     copy_string_settings();
 215   }
 216   retval = str_fileread(&config_file_str, p_filename, VSFTP_CONF_FILE_MAX);
 217   if (vsf_sysutil_retval_is_error(retval))
 218   {
 219     if (errs_fatal)
 220     {
 221       die2("cannot open config file:", p_filename);
 222     }
 223     else
 224     {
 225       return;
 226     }
 227   }
 228   while (str_getline(&config_file_str, &config_setting_str, &str_pos))
 229   {
 230     if (str_isempty(&config_setting_str) ||
 231         str_get_char_at(&config_setting_str, 0) == '#')
 232     {
 233       continue;
 234     }
 235     /* Split into name=value pair */
 236     str_split_char(&config_setting_str, &config_value_str, '=');
 237     handle_config_setting(&config_setting_str, &config_value_str, errs_fatal);
 238   }
 239   str_free(&config_file_str);
 240   str_free(&config_setting_str);
 241   str_free(&config_value_str);
 242 }
 243
 244 static void
 245 handle_config_setting(struct mystr* p_setting_str, struct mystr* p_value_str,
 246                       int errs_fatal)
 247 {
 248   /* Is it a string setting? */
 249   {
 250     const struct parseconf_str_setting* p_str_setting = parseconf_str_array;
 251     while (p_str_setting->p_setting_name != 0)
 252     {
 253       if (str_equal_text(p_setting_str, p_str_setting->p_setting_name))
 254       {
 255         /* Got it */
 256         const char** p_curr_setting = p_str_setting->p_variable;
 257         if (*p_curr_setting)
 258         {
 259           vsf_sysutil_free((char*)*p_curr_setting);
 260         }
 261         if (str_isempty(p_value_str))
 262         {
 263           *p_curr_setting = 0;
 264         }
 265         else
 266         {
 267           *p_curr_setting = str_strdup(p_value_str);
 268         }
 269         return;
 270       }
 271       p_str_setting++;
 272     }
 273   }
 274   if (str_isempty(p_value_str))
 275   {
 276     if (errs_fatal)
 277     {
 278       die2("missing value in config file for: ", str_getbuf(p_setting_str));
 279     }
 280     else
 281     {
 282       return;
 283     }
 284   }
 285   /* Is it a boolean value? */
 286   {
 287     const struct parseconf_bool_setting* p_bool_setting = parseconf_bool_array;
 288     while (p_bool_setting->p_setting_name != 0)
 289     {
 290       if (str_equal_text(p_setting_str, p_bool_setting->p_setting_name))
 291       {
 292         /* Got it */
 293         str_upper(p_value_str);
 294         if (str_equal_text(p_value_str, "YES") ||
 295             str_equal_text(p_value_str, "TRUE") ||
 296             str_equal_text(p_value_str, "1"))
 297         {
 298           *(p_bool_setting->p_variable) = 1;
 299         }
 300         else if (str_equal_text(p_value_str, "NO") ||
 301                  str_equal_text(p_value_str, "FALSE") ||
 302                  str_equal_text(p_value_str, "0"))
 303         {
 304           *(p_bool_setting->p_variable) = 0;
 305         }
 306         else if (errs_fatal)
 307         {
 308           die2("bad bool value in config file for: ",
 309                str_getbuf(p_setting_str));
 310         }
 311         return;
 312       }
 313       p_bool_setting++;
 314     }
 315   }
 316   /* Is it an unsigned integer setting? */
 317   {
 318     const struct parseconf_uint_setting* p_uint_setting = parseconf_uint_array;
 319     while (p_uint_setting->p_setting_name != 0)
 320     {
 321       if (str_equal_text(p_setting_str, p_uint_setting->p_setting_name))
 322       {
 323         /* Got it */
 324         /* If the value starts with 0, assume it's an octal value */
 325         if (!str_isempty(p_value_str) &&
 326             str_get_char_at(p_value_str, 0) == '0')
 327         {
 328           *(p_uint_setting->p_variable) = str_octal_to_uint(p_value_str);
 329         }
 330         else
 331         {
 332           *(p_uint_setting->p_variable) = str_atoi(p_value_str);
 333         }
 334         return;
 335       }
 336       p_uint_setting++;
 337     }
 338   }
 339   if (errs_fatal)
 340   {
 341     die2("unrecognised variable in config file: ", str_getbuf(p_setting_str));
 342   }
 343 }
 344
 345 static void
 346 copy_string_settings(void)
 347 {
 348   const struct parseconf_str_setting* p_str_setting = parseconf_str_array;
 349   while (p_str_setting->p_setting_name != 0)
 350   {
 351     if (*p_str_setting->p_variable != 0)
 352     {
 353       *p_str_setting->p_variable =
 354           vsf_sysutil_strdup(*p_str_setting->p_variable);
 355     }
 356     p_str_setting++;
 357   }
 358 }
 359