/* * Copyright (c) 1985, 1993, 1994 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */#ifndef lintstatic char sccsid[] = "@(#)ruserpass.c	8.4 (Berkeley) 4/27/95";#endif /* not lint */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <sys/types.h>#include <sys/stat.h>#include <ctype.h>#include <errno.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#if defined(HAVE_STDARG_H) && defined(__STDC__) && __STDC__#include <stdarg.h>#else#include <varargs.h>#endif#include <err.h>#include "ftp_var.h"extern char *localhost __P((void));extern char *xstrdup __P((const char *));extern char *xmalloc __P((size_t));static	int token __P((void));static	FILE *cfile;/* protect agains os headers */#undef	DEFAULT#define	DEFAULT	1#undef	LOGIN#define	LOGIN	2#undef	PASSWD#define	PASSWD	3#undef	ACCOUNT#define	ACCOUNT 4#undef  MACDEF#define MACDEF  5#undef	ID#define	ID	10#undef	MACHINE#define	MACHINE	11static char tokval[100];static struct toktab {  char *tokstr;  int tval;} toktab[]= {  { "default",	DEFAULT },  { "login",	LOGIN },  { "password",	PASSWD },  { "passwd",	PASSWD },  { "account",	ACCOUNT },  { "machine",	MACHINE },  { "macdef",	MACDEF },  { NULL,		0 }};intruserpass(char *host, char **aname, char **apass, char **aacct){  char *hdir, buf[BUFSIZ], *tmp;  char *myname = 0, *mydomain;  int t, i, c, usedefault = 0;  struct stat stb;  hdir = getenv("HOME");  if (hdir == NULL)    hdir = ".";  snprintf (buf, sizeof buf, "%s/.netrc", hdir);  cfile = fopen(buf, "r");  if (cfile == NULL)    {      if (errno != ENOENT)	warn("%s", buf);      return (0);    }  myname = localhost ();  if (! myname)    myname = xstrdup ("");  mydomain = strchr(myname, '.');  if (mydomain == NULL)    mydomain = xstrdup (""); next:  while ((t = token()))    switch(t)      {      case DEFAULT:	usedefault = 1;	/* FALL THROUGH */      case MACHINE:	if (!usedefault)	  {	    if (token() != ID)	      continue;	    /*	     * Allow match either for user's input host name	     * or official hostname.  Also allow match of	     * incompletely-specified host in local domain.  */	    if (strcasecmp(host, tokval) == 0)	      goto match;	    if (strcasecmp(hostname, tokval) == 0)	      goto match;	    if ((tmp = strchr(hostname, '.')) != NULL		&& strcasecmp(tmp, mydomain) == 0		&& strncasecmp(hostname, tokval, tmp-hostname) == 0		&& tokval[tmp - hostname] == '\0')	      goto match;	    if ((tmp = strchr(host, '.')) != NULL		&& strcasecmp(tmp, mydomain) == 0		&& strncasecmp(host, tokval, tmp - host) == 0		&& tokval[tmp - host] == '\0')	      goto match;	    continue;	  }      match:	while ((t = token()) && t != MACHINE && t != DEFAULT)	  switch(t)	    {	    case LOGIN:	      if (token())		if (*aname == 0)		  {		    *aname = xmalloc((unsigned) strlen(tokval) + 1);		    (void) strcpy(*aname, tokval);		  }		else		  {		    if (strcmp(*aname, tokval))		      goto next;		  }	      break;	    case PASSWD:	      if ((*aname == NULL || strcmp(*aname, "anonymous"))		  && fstat(fileno(cfile), &stb) >= 0		  && (stb.st_mode & 077) != 0)		{		  warnx("Error: .netrc file is readable by others.");		  warnx("Remove password or make file unreadable by others.");		  goto bad;		}	      if (token() && *apass == 0)		{		  *apass = xmalloc((unsigned) strlen(tokval) + 1);		  (void) strcpy(*apass, tokval);		}	      break;	    case ACCOUNT:	      if (fstat(fileno(cfile), &stb) >= 0		  && (stb.st_mode & 077) != 0)		{		  warnx("Error: .netrc file is readable by others.");		  warnx("Remove account or make file unreadable by others.");		  goto bad;		}	      if (token() && *aacct == 0)		{		  *aacct = xmalloc((unsigned) strlen(tokval) + 1);		  (void) strcpy(*aacct, tokval);		}	      break;	    case MACDEF:	      if (proxy)		goto done;	      while ((c=getc(cfile)) != EOF && c == ' ' || c == '\t')		;	      if (c == EOF || c == '\n')		{		  printf("Missing macdef name argument.\n");		  goto bad;		}	      if (macnum == 16)		{		  printf("Limit of 16 macros have already been defined\n");		  goto bad;		}	      tmp = macros[macnum].mac_name;	      *tmp++ = c;	      for (i=0; i < 8 && (c=getc(cfile)) != EOF && !isspace(c); ++i)		{		  *tmp++ = c;		}	      if (c == EOF)		{		  printf("Macro definition missing null line terminator.\n");		  goto bad;		}	      *tmp = '\0';	      if (c != '\n')		{		  while ((c = getc(cfile)) != EOF && c != '\n');		}	      if (c == EOF)		{		  printf("Macro definition missing null line terminator.\n");		  goto bad;		}	      if (macnum == 0)		{		  macros[macnum].mac_start = macbuf;		}	      else		{		  macros[macnum].mac_start = macros[macnum-1].mac_end + 1;		}	      tmp = macros[macnum].mac_start;	      while (tmp != macbuf + 4096)		{		  if ((c = getc (cfile)) == EOF)		    {		      printf("Macro definition missing null line terminator.\n");		      goto bad;		    }		  *tmp = c;		  if (*tmp == '\n')		    {		      if (*(tmp-1) == '\0')			{			  macros[macnum++].mac_end = tmp - 1;			  break;			}		      *tmp = '\0';		    }		  tmp++;		}	      if (tmp == macbuf + 4096)		{		  printf("4K macro buffer exceeded\n");		  goto bad;		}	      break;	    default:	      warnx("Unknown .netrc keyword %s", tokval);	      break;	    }	goto done;      } done:  (void) fclose(cfile);  if (myname)    free (myname);  return (0); bad:  (void) fclose(cfile);  if (myname)    free (myname);  return (-1);}static inttoken(void){  char *cp;  int c;  struct toktab *t;  if (feof(cfile) || ferror(cfile))    return (0);  while ((c = getc(cfile)) != EOF &&	 (c == '\n' || c == '\t' || c == ' ' || c == ','))    continue;  if (c == EOF)    return (0);  cp = tokval;  if (c == '"')    {      while ((c = getc(cfile)) != EOF && c != '"')	{	  if (c == '\\')	    c = getc(cfile);	  *cp++ = c;	}    }  else    {      *cp++ = c;      while ((c = getc(cfile)) != EOF	     && c != '\n' && c != '\t' && c != ' ' && c != ',')	{	  if (c == '\\')	    c = getc(cfile);	  *cp++ = c;	}    }  *cp = 0;  if (tokval[0] == 0)    return (0);  for (t = toktab; t->tokstr; t++)    if (!strcmp(t->tokstr, tokval))      return (t->tval);  return (ID);}