/*

servconf.c

Author: Tatu Ylonen <ylo@cs.hut.fi>

Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                   All rights reserved

Created: Mon Aug 21 15:48:58 1995 ylo

*/

/*
 * $Id: servconf.c,v 1.14 1998/05/23 20:34:11 kivinen Exp $
 * $Log: servconf.c,v $
 * Revision 1.14  1998/05/23 20:34:11  kivinen
 * 	Added forced_empty_passwd_change, num_deny_shosts,
 * 	num_allow_shosts, password_expire_warning_days,
 * 	account_expire_warning_days. Fixed typo in
 * 	forcedpasswordchange.
 *
 * Revision 1.13  1998/03/27  16:59:58  kivinen
 * 	Added IgnoreRootRhosts option.
 *
 * Revision 1.12  1998/01/03 06:41:55  kivinen
 * 	Added allow/deny groups option.
 *
 * Revision 1.11  1998/01/02 06:20:33  kivinen
 * 	Added xauthlocation and checkmail options.
 *
 * Revision 1.10  1997/04/27 21:51:34  kivinen
 * 	Added F-SECURE stuff. Added {Allow,Deny}Forwarding{To,Port}
 * 	feature. Added {Allow,Deny}Users feature from Steve Kann
 * 	<stevek@SteveK.COM>.
 *
 * Revision 1.9  1997/04/21 01:03:59  kivinen
 * 	Fixed allow_tcp_forwarding option default to yes.
 *
 * Revision 1.8  1997/04/05 21:50:07  kivinen
 * 	Fixed bug in allow_tcp_forwarding code.
 *
 * Revision 1.7  1997/03/27 03:14:16  kivinen
 * 	Changed sAllow_Tcp_Forwarding to sAllowTcpForwarding and
 * 	sKerberos_Or_Local_Passwd to sKerberosOrLocalPasswd.
 *
 * Revision 1.6  1997/03/27 03:12:39  kivinen
 * 	Added kerberos patches from Glenn Machin.
 * 	Added USELOGIN patches from Brian Cully.
 *
 * Revision 1.5  1997/03/26 05:33:16  kivinen
 * 	Added idle_timeout option.
 *
 * Revision 1.4  1997/03/25 05:44:38  kivinen
 * 	Added SilentDeny and Umask options.
 * 	Added = to WHITESPACE to allow options in form foo=bar.
 * 	Changed keywords to be case insensitive.
 *
 * Revision 1.3  1997/03/19 17:55:04  kivinen
 * 	Added TIS authentication code from Andre April
 * 	<Andre.April@cediti.be>.
 * 	Added SECURE_RPC, SECURE_NFS and NIS_PLUS support from Andy
 * 	Polyakov <appro@fy.chalmers.se>.
 *
 * Revision 1.2  1996/11/27 15:38:27  ttsalo
 *     Added X11DisplayOffset-option
 *
 * Revision 1.1.1.1  1996/02/18 21:38:12  ylo
 * 	Imported ssh-1.2.13.
 *
 * $EndLog$
 */

#include "includes.h"
#include "ssh.h"
#include "servconf.h"
#include "xmalloc.h"

/* Initializes the server options to their default values. */

void initialize_server_options(ServerOptions *options)
{
  memset(options, 0, sizeof(*options));
  options->port = -1;
  options->listen_addr.s_addr = INADDR_ANY;
  options->host_key_file = NULL;
  options->random_seed_file = NULL;
  options->pid_file = NULL;
  options->server_key_bits = -1;
  options->login_grace_time = -1;
  options->key_regeneration_time = -1;
  options->permit_root_login = -1;
  options->ignore_rhosts = -1;
  options->ignore_root_rhosts = -1;
  options->quiet_mode = -1;
  options->fascist_logging = -1;
  options->print_motd = -1;
  options->x11_forwarding = -1;
  options->x11_display_offset = -1;
  options->strict_modes = -1;
  options->keepalives = -1;
  options->log_facility = (SyslogFacility)-1;
  options->rhosts_authentication = -1;
  options->rhosts_rsa_authentication = -1;
  options->rsa_authentication = -1;
  options->kerberos_authentication = -1;
  options->kerberos_or_local_passwd = -1;
  options->kerberos_tgt_passing = -1;
  options->tis_authentication = -1;
  options->allow_tcp_forwarding = -1;
  options->password_authentication = -1;
  options->permit_empty_passwd = -1;
  options->use_login = -1;
  options->silent_deny = -1;
  options->forced_passwd_change = -1;
  options->forced_empty_passwd_change = -1;
  options->num_allow_shosts = 0;
  options->num_deny_shosts = 0;
  options->num_allow_hosts = 0;
  options->num_deny_hosts = 0;
  options->num_allow_users = 0;
  options->num_deny_users = 0;
  options->num_allow_groups = 0;
  options->num_deny_groups = 0;
#ifdef F_SECURE_COMMERCIAL




#endif /* F_SECURE_COMMERCIAL */
  options->umask = -1;
  options->idle_timeout = -1;
  options->xauth_path = NULL;
  options->check_mail = -1;
  options->password_expire_warning_days = -1;
  options->account_expire_warning_days = -1;
}

void fill_default_server_options(ServerOptions *options)
{
  if (options->port == -1)
    {
      struct servent *sp;

      sp = getservbyname(SSH_SERVICE_NAME, "tcp");
      if (sp)
	options->port = ntohs(sp->s_port);
      else
	options->port = SSH_DEFAULT_PORT;
      endservent();
    }
  if (options->host_key_file == NULL)
    options->host_key_file = HOST_KEY_FILE;
  if (options->random_seed_file == NULL)
    options->random_seed_file = SSH_DAEMON_SEED_FILE;
  if (options->pid_file == NULL)
    options->pid_file = SSH_DAEMON_PID_FILE;
  if (options->server_key_bits == -1)
    options->server_key_bits = 768;
  if (options->login_grace_time == -1)
    options->login_grace_time = 600;
  if (options->key_regeneration_time == -1)
    options->key_regeneration_time = 3600;
  if (options->permit_root_login == -1)
    options->permit_root_login = 2;
  if (options->ignore_rhosts == -1)
    options->ignore_rhosts = 0;
  if (options->ignore_root_rhosts == -1)
    options->ignore_root_rhosts = options->ignore_rhosts;
  if (options->quiet_mode == -1)
    options->quiet_mode = 0;
  if (options->fascist_logging == -1)
    options->fascist_logging = 1;
  if (options->print_motd == -1)
    options->print_motd = 1;
  if (options->x11_forwarding == -1)
    options->x11_forwarding = 1;
  if (options->x11_display_offset == -1)
    options->x11_display_offset = 1;
  if (options->strict_modes == -1)
    options->strict_modes = 1;
  if (options->keepalives == -1)
    options->keepalives = 1;
  if (options->log_facility == (SyslogFacility)(-1))
    options->log_facility = SYSLOG_FACILITY_DAEMON;
  if (options->rhosts_authentication == -1)
    options->rhosts_authentication = 0;
  if (options->rhosts_rsa_authentication == -1)
    options->rhosts_rsa_authentication = 1;
  if (options->rsa_authentication == -1)
    options->rsa_authentication = 1;
  if (options->kerberos_authentication == -1)
#if defined(KERBEROS) && defined(KRB5)
    options->kerberos_authentication = 1;
#else  /* defined(KERBEROS) && defined(KRB5) */
    options->kerberos_authentication = 0;
#endif /* defined(KERBEROS) && defined(KRB5) */
  if (options->kerberos_or_local_passwd == -1)
    options->kerberos_or_local_passwd = 0;
  if (options->kerberos_tgt_passing == -1)
#if defined(KERBEROS_TGT_PASSING) && defined(KRB5)
    options->kerberos_tgt_passing = 1;
#else  /* defined(KERBEROS_TGT_PASSING) && defined(KRB5) */
    options->kerberos_tgt_passing = 0;
#endif /* defined(KERBEROS_TGT_PASSING) && defined(KRB5) */
  if (options->allow_tcp_forwarding == -1)
    options->allow_tcp_forwarding = 1;
  if (options->tis_authentication == -1)
    options->tis_authentication = 0;
  if (options->password_authentication == -1)
    options->password_authentication = 1;
  if (options->permit_empty_passwd == -1)
    options->permit_empty_passwd = 1;
  if (options->use_login == -1)
    options->use_login = 0;
  if (options->silent_deny == -1)
    options->silent_deny = 0;
  if (options->forced_passwd_change == -1)
    options->forced_passwd_change = 1;
  if (options->forced_empty_passwd_change == -1)
    options->forced_empty_passwd_change = 0;
  if (options->idle_timeout == -1)
    options->idle_timeout = 0;
  if (options->check_mail == -1)
    options->check_mail = 1;
#ifdef XAUTH_PATH
  if (options->xauth_path == NULL)
    options->xauth_path = XAUTH_PATH;
#else   /* !XAUTH_PATH */
  if (options->xauth_path == NULL)
    options->xauth_path = "xauth";
#endif  /* !XAUTH_PATH */
  if (options->password_expire_warning_days == -1)
    options->password_expire_warning_days = 14;
  if (options->account_expire_warning_days == -1)
    options->account_expire_warning_days = 14;
}

#define WHITESPACE " \t\r\n="

/* Keyword tokens. */
typedef enum 
{
  sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
  sPermitRootLogin, sQuietMode, sFascistLogging, sLogFacility,
  sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
  sTISAuthentication, sPasswordAuthentication, sAllowHosts, sDenyHosts,
  sListenAddress, sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset,
  sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sPidFile,
  sForcedPasswd, sForcedEmptyPasswd, sUmask, sSilentDeny, sIdleTimeout,
  sUseLogin, sKerberosAuthentication, sKerberosOrLocalPasswd,
  sKerberosTgtPassing, sAllowTcpForwarding, sAllowUsers, sDenyUsers,
  sXauthPath, sCheckMail, sDenyGroups, sAllowGroups, sIgnoreRootRhosts,
  sAllowSHosts, sDenySHosts, sPasswordExpireWarningDays,
  sAccountExpireWarningDays
#ifdef F_SECURE_COMMERCIAL


#endif /* F_SECURE_COMMERCIAL */
} ServerOpCodes;

/* Textual representation of the tokens. */
static struct
{
  const char *name;
  ServerOpCodes opcode;
} keywords[] =
{
  { "port", sPort },
  { "hostkey", sHostKeyFile },
  { "serverkeybits", sServerKeyBits },
  { "logingracetime", sLoginGraceTime },
  { "keyregenerationinterval", sKeyRegenerationTime },
  { "permitrootlogin", sPermitRootLogin },
  { "quietmode", sQuietMode },
  { "fascistlogging", sFascistLogging },
  { "syslogfacility", sLogFacility },
  { "rhostsauthentication", sRhostsAuthentication },
  { "rhostsrsaauthentication", sRhostsRSAAuthentication },
  { "rsaauthentication", sRSAAuthentication },
  { "tisauthentication", sTISAuthentication },
  { "passwordauthentication", sPasswordAuthentication },
  { "uselogin", sUseLogin },
  { "allowshosts", sAllowSHosts },
  { "denyshosts", sDenySHosts },
  { "allowhosts", sAllowHosts },
  { "denyhosts", sDenyHosts },
  { "allowusers", sAllowUsers },
  { "denyusers", sDenyUsers },
  { "allowgroups", sAllowGroups },
  { "denygroups", sDenyGroups },
#ifdef F_SECURE_COMMERCIAL




#endif /* F_SECURE_COMMERCIAL */
  { "listenaddress", sListenAddress },
  { "printmotd", sPrintMotd },
  { "ignorerhosts", sIgnoreRhosts },
  { "ignorerootrhosts", sIgnoreRootRhosts },
  { "x11forwarding", sX11Forwarding },
  { "x11displayoffset", sX11DisplayOffset },
  { "strictmodes", sStrictModes },
  { "permitemptypasswords", sEmptyPasswd },
  { "forcedpasswdchange", sForcedPasswd },
  { "randomseed", sRandomSeedFile },
  { "keepalive", sKeepAlives },
  { "pidfile", sPidFile },
  { "umask", sUmask },
  { "silentdeny", sSilentDeny },
  { "idletimeout", sIdleTimeout },
  { "kerberosauthentication", sKerberosAuthentication },
  { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
  { "kerberostgtpassing", sKerberosTgtPassing },
  { "allowtcpforwarding", sAllowTcpForwarding },
  { "xauthlocation", sXauthPath },
  { "checkmail", sCheckMail },
  { "passwordexpirewarningdays", sPasswordExpireWarningDays },
  { "accountexpirewarningdays", sAccountExpireWarningDays },
  { NULL, 0 }
};

static struct 
{
  const char *name;
  SyslogFacility facility;
} log_facilities[] =
{
  { "daemon", SYSLOG_FACILITY_DAEMON },
  { "user", SYSLOG_FACILITY_USER },
  { "auth", SYSLOG_FACILITY_AUTH },
  { "local0", SYSLOG_FACILITY_LOCAL0 },
  { "local1", SYSLOG_FACILITY_LOCAL1 },
  { "local2", SYSLOG_FACILITY_LOCAL2 },
  { "local3", SYSLOG_FACILITY_LOCAL3 },
  { "local4", SYSLOG_FACILITY_LOCAL4 },
  { "local5", SYSLOG_FACILITY_LOCAL5 },
  { "local6", SYSLOG_FACILITY_LOCAL6 },
  { "local7", SYSLOG_FACILITY_LOCAL7 },
  { NULL, 0 }
};

/* Returns the number of the token pointed to by cp of length len.
   Never returns if the token is not known. */

static ServerOpCodes parse_token(const char *cp, const char *filename,
				 int linenum)
{
  unsigned int i;

  for (i = 0; keywords[i].name; i++)
    if (strcmp(cp, keywords[i].name) == 0)
      return keywords[i].opcode;

  fprintf(stderr, "%s line %d: Bad configuration option: %s\n", 
	  filename, linenum, cp);
  exit(1);
}

/* Reads the server configuration file. */

void read_server_config(ServerOptions *options, const char *filename)
{
  FILE *f;
  char line[1024];
  char *cp, **charptr;
  int linenum, *intptr, i, value;
  ServerOpCodes opcode;

  f = fopen(filename, "r");
  if (!f)
    {
      perror(filename);
      return;
    }

  linenum = 0;
  while (fgets(line, sizeof(line), f))
    {
      linenum++;
      cp = line + strspn(line, WHITESPACE);
      if (!*cp || *cp == '#')
	continue;
      cp = strtok(cp, WHITESPACE);
      for(i = 0; cp[i]; i++)
	cp[i] = tolower(cp[i]);
      opcode = parse_token(cp, filename, linenum);
      switch (opcode)
	{
	case sPort:
	  intptr = &options->port;
	parse_int:
	  cp = strtok(NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing integer value.\n", 
		      filename, linenum);
	      exit(1);
	    }
	  if (*cp == '0')	/* Octal or hex */
	    {
	      int base;
	      
	      cp++;
	      if (*cp == 'x')	/* Hex */
		{
		  cp++;
		  base = 16;
		}
	      else
		base = 8;
	      value = 0;
	      while ((base == 16 && isxdigit(*cp)) ||
		     (base == 8 && isdigit(*cp) && *cp < '8'))
		{
		  value *= base;
		  if (*cp >= 'a' && *cp <= 'f')
		    value += *cp - 'a' + 10;
		  else if (*cp >= 'A' && *cp <= 'F')
		    value += *cp - 'A' + 10;
		  else
		    value += *cp - '0';
		  cp++;
		}
	    }
	  else
	    {
	      value = atoi(cp);
	    }
	  if (*intptr == -1)
	    *intptr = value;
	  break;

	case sServerKeyBits:
	  intptr = &options->server_key_bits;
	  goto parse_int;

	case sLoginGraceTime:
	  intptr = &options->login_grace_time;
	  goto parse_int;
	  
	case sKeyRegenerationTime:
	  intptr = &options->key_regeneration_time;
	  goto parse_int;

	case sListenAddress:
	  cp = strtok(NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing inet addr.\n",
		      filename, linenum);
	      exit(1);
	    }
#ifdef BROKEN_INET_ADDR
	  options->listen_addr.s_addr = inet_network(cp);
#else /* BROKEN_INET_ADDR */
	  options->listen_addr.s_addr = inet_addr(cp);
#endif /* BROKEN_INET_ADDR */
	  break;

	case sHostKeyFile:
	  charptr = &options->host_key_file;
	parse_pathname:
	  cp = strtok(NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing file name.\n",
		      filename, linenum);
	      exit(1);
	    }
	  if (*charptr == NULL)
	    *charptr = tilde_expand_filename(cp, getuid());
	  break;

	case sRandomSeedFile:
	  charptr = &options->random_seed_file;
	  goto parse_pathname;

	case sPidFile:
	  charptr = &options->pid_file;
	  goto parse_pathname;

	case sPermitRootLogin:
	  cp = strtok (NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing yes/nopwd/no argument.\n",
		      filename, linenum);
	      exit(1);
	    }
	  for(i = 0; cp[i]; i++)
	    cp[i] = tolower(cp[i]);
	  if (strcmp(cp, "yes") == 0)
	    value = 2;
	  else if (strcmp(cp, "nopwd") == 0)
	      value = 1;
	  else if (strcmp(cp, "no") == 0)
	    value = 0;
	  else
	    {
	      fprintf(stderr, "%s line %d: Bad yes/nopwd/no argument: %s\n", 
		      filename, linenum, cp);
	      exit(1);
	    }
	  if (options->permit_root_login == -1)
	    options->permit_root_login = value;
	  break;

	parse_flag:
	  cp = strtok(NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing yes/no argument.\n",
		      filename, linenum);
	      exit(1);
	    }
	  for(i = 0; cp[i]; i++)
	    cp[i] = tolower(cp[i]);
	  if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
	    value = 1;
	  else
	    if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
	      value = 0;
	    else
	      {
		fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n", 
			filename, linenum, cp);
		exit(1);
	      }
	  if (*intptr == -1)
	    *intptr = value;
	  break;

	case sIgnoreRhosts:
	  intptr = &options->ignore_rhosts;
	  goto parse_flag;
	  
	case sIgnoreRootRhosts:
	  intptr = &options->ignore_root_rhosts;
	  goto parse_flag;
	  
	case sQuietMode:
	  intptr = &options->quiet_mode;
	  goto parse_flag;

	case sFascistLogging:
	  intptr = &options->fascist_logging;
	  goto parse_flag;

	case sRhostsAuthentication:
	  intptr = &options->rhosts_authentication;
	  goto parse_flag;

	case sRhostsRSAAuthentication:
	  intptr = &options->rhosts_rsa_authentication;
	  goto parse_flag;
	  
	case sRSAAuthentication:
	  intptr = &options->rsa_authentication;
	  goto parse_flag;
	  
 	case sKerberosAuthentication:
 	  intptr = &options->kerberos_authentication;
 	  goto parse_flag;
	  
 	case sKerberosOrLocalPasswd:
 	  intptr = &options->kerberos_or_local_passwd;
 	  goto parse_flag;
	  
 	case sKerberosTgtPassing:
 	  intptr = &options->kerberos_tgt_passing;
 	  goto parse_flag;
	  
 	case sAllowTcpForwarding:
 	  intptr = &options->allow_tcp_forwarding;
	  goto parse_flag;
	  
	case sTISAuthentication:
	  intptr = &options->tis_authentication;
	  goto parse_flag;
	  
	case sPasswordAuthentication:
	  intptr = &options->password_authentication;
	  goto parse_flag;

	case sUseLogin:
	  intptr = &options->use_login;
	  goto parse_flag;
	  
	case sPrintMotd:
	  intptr = &options->print_motd;
	  goto parse_flag;

	case sX11Forwarding:
	  intptr = &options->x11_forwarding;
	  goto parse_flag;

        case sX11DisplayOffset:
            intptr = &options->x11_display_offset;
            goto parse_int;

	case sStrictModes:
	  intptr = &options->strict_modes;
	  goto parse_flag;

	case sKeepAlives:
	  intptr = &options->keepalives;
	  goto parse_flag;
	  
	case sEmptyPasswd:
	  intptr = &options->permit_empty_passwd;
	  goto parse_flag;
	  
	case sSilentDeny:
	  intptr = &options->silent_deny;
	  goto parse_flag;

	case sForcedPasswd:
	  intptr = &options->forced_passwd_change;
	  goto parse_flag;

	case sForcedEmptyPasswd:
	  intptr = &options->forced_empty_passwd_change;
	  goto parse_flag;

	case sUmask:
	  intptr = &options->umask;
	  goto parse_int;

	case sIdleTimeout:
	  cp = strtok(NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing integer value.\n", 
		      filename, linenum);
	      exit(1);
	    }
	  value = 0;
	  while(isdigit(*cp))
	    {
	      value *= 10;
	      value += *cp - '0';
	      cp++;
	    }
	  *cp = tolower(*cp);
	  if (*cp == 'w') /* Weeks */
	    {
	      value *= 7 * 24 * 60 * 60;
	      cp++;
	    }
	  else if (*cp == 'd') /* Days */
	    {
	      value *= 24 * 60 * 60;
	      cp++;
	    }
	  else if (*cp == 'h') /* Hours */
	    {
	      value *= 60 * 60;
	      cp++;
	    }
	  else if (*cp == 'm') /* Minutes */
	    {
	      value *= 60;
	      cp++;
	    }
	  else if (*cp == 's')
	    {
	      cp++;
	    }
	  options->idle_timeout = value;
	  break;

	case sLogFacility:
	  cp = strtok(NULL, WHITESPACE);
	  if (!cp)
	    {
	      fprintf(stderr, "%s line %d: missing facility name.\n",
		      filename, linenum);
	      exit(1);
	    }
	  for(i = 0; cp[i]; i++)
	    cp[i] = tolower(cp[i]);
	  for (i = 0; log_facilities[i].name; i++)
	    if (strcmp(log_facilities[i].name, cp) == 0)
	      break;
	  if (!log_facilities[i].name)
	    {
	      fprintf(stderr, "%s line %d: unsupported log facility %s\n",
		      filename, linenum, cp);
	      exit(1);
	    }
	  if (options->log_facility == (SyslogFacility)(-1))
	    options->log_facility = log_facilities[i].facility;
	  break;
	  
	case sAllowSHosts:
	  while ((cp = strtok(NULL, WHITESPACE)))
	    {
	      if (options->num_allow_shosts >= MAX_ALLOW_SHOSTS)
		{
		  fprintf(stderr, "%s line %d: too many allow shosts.\n",
			  filename, linenum);
		  exit(1);
		}
	      options->allow_shosts[options->num_allow_shosts++] = xstrdup(cp);
	    }
	  break;

	case sDenySHosts:
	  while ((cp = strtok(NULL, WHITESPACE)))
	    {
	      if (options->num_deny_shosts >= MAX_DENY_SHOSTS)
		{
		  fprintf(stderr, "%s line %d: too many deny shosts.\n",
			  filename, linenum);
		  exit(1);
		}
	      options->deny_shosts[options->num_deny_shosts++] = xstrdup(cp);
	    }
	  break;

	case sAllowHosts:
	  while ((cp = strtok(NULL, WHITESPACE)))
	    {
	      if (options->num_allow_hosts >= MAX_ALLOW_HOSTS)
		{
		  fprintf(stderr, "%s line %d: too many allow hosts.\n",
			  filename, linenum);
		  exit(1);
		}
	      options->allow_hosts[options->num_allow_hosts++] = xstrdup(cp);
	    }
	  break;

	case sDenyHosts:
	  while ((cp = strtok(NULL, WHITESPACE)))
	    {
	      if (options->num_deny_hosts >= MAX_DENY_HOSTS)
		{
		  fprintf(stderr, "%s line %d: too many deny hosts.\n",
			  filename, linenum);
		  exit(1);
		}
	      options->deny_hosts[options->num_deny_hosts++] = xstrdup(cp);
	    }
	  break;

	case sAllowUsers:
	  while ((cp = strtok(NULL, WHITESPACE)))
	    {
	      if (options->num_allow_users >= MAX_ALLOW_USERS)
		{
		  fprintf(stderr, "%s line %d: too many allow users.\n",
			  filename, linenum);
		  exit(1);
		}
	      options->allow_users[options->num_allow_users++] = xstrdup(cp);
	    }
	  break;
	  
	case sDenyUsers:
	  while ((cp = strtok(NULL, WHITESPACE)))
	    {
	      if (options->num_deny_users >= MAX_DENY_USERS)
		{
		  fprintf(stderr, "%s line %d: too many deny users.\n",
			  filename, linenum);
		  exit(1);
		}
	      options->deny_users[options->num_deny_users++] = xstrdup(cp);
	    }
	  break;
	  
	case sAllowGroups:
 	  while ((cp = strtok(NULL, WHITESPACE)))
 	    {
 	      if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
 		{
 		  fprintf(stderr, "%s line %d: too many allow groups.\n",
 			  filename, linenum);
 		  exit(1);
 		}
 	      options->allow_groups[options->num_allow_groups++] = xstrdup(cp);
 	    }
 	  break;
 	  
 	case sDenyGroups:
 	  while ((cp = strtok(NULL, WHITESPACE)))
 	    {
 	      if (options->num_deny_groups >= MAX_DENY_GROUPS)
 		{
 		  fprintf(stderr, "%s line %d: too many deny groups.\n",
 			  filename, linenum);
 		  exit(1);
 		}
 	      options->deny_groups[options->num_deny_groups++] = xstrdup(cp);
  	    }
  	  break;
	  
	case sXauthPath:
 	  charptr = &options->xauth_path;
 	  goto parse_pathname;

	case sCheckMail:
	  intptr = &options->check_mail;
	  goto parse_flag;
	  
	case sPasswordExpireWarningDays:
	  intptr = &options->password_expire_warning_days;
	  goto parse_int;

	case sAccountExpireWarningDays:
	  intptr = &options->account_expire_warning_days;
	  goto parse_int;

#ifdef F_SECURE_COMMERCIAL























































#endif /* F_SECURE_COMMERCIAL */
	  
	default:
	  fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n",
		  filename, linenum, cp, opcode);
	  exit(1);
	}
      if (strtok(NULL, WHITESPACE) != NULL)
	{
	  fprintf(stderr, "%s line %d: garbage at end of line.\n",
		  filename, linenum);
	  exit(1);
	}
    }
  fclose(f);
}
