base/applications/network/ftp/ruserpass.c

   1 /*
   2  * Copyright (c) 1985 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * advertising materials, and other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 #ifndef lint
  19 static char sccsid[] = "@(#)ruserpass.c 5.1 (Berkeley) 3/1/89";
  20 #endif /* not lint */
  21
  22 #include <sys/types.h>
  23 #include <stdio.h>
  24 //#include <utmp.h>
  25 #include <ctype.h>
  26 #include <sys/stat.h>
  27 #include <errno.h>
  28 #include "ftp_var.h"
  29 #include "prototypes.h"
  30 #include <winsock.h>
  31
  32 struct  utmp *getutmp();
  33 static  FILE *cfile;
  34
  35 #ifndef MAXHOSTNAMELEN
  36 #define MAXHOSTNAMELEN 64
  37 #endif
  38
  39 #define DEFAULT 1
  40 #define LOGIN   2
  41 #define PASSWD  3
  42 #define ACCOUNT 4
  43 #define MACDEF  5
  44 #define ID      10
  45 #define MACH    11
  46
  47 static char tokval[100];
  48
  49 static struct toktab {
  50         const char *tokstr;
  51         int tval;
  52 } toktab[]= {
  53         {"default",     DEFAULT},
  54         {"login",       LOGIN},
  55         {"password",    PASSWD},
  56         {"passwd",      PASSWD},
  57         {"account",     ACCOUNT},
  58         {"machine",     MACH},
  59         {"macdef",      MACDEF},
  60         {0,             0}
  61 };
  62
  63 extern char *hostname;
  64 static int token(void);
  65
  66 int ruserpass(const char *host, char **aname, char **apass, char **aacct)
  67 {
  68         const char *hdir, *mydomain;
  69     char buf[BUFSIZ], *tmp;
  70         char myname[MAXHOSTNAMELEN];
  71         int t, i, c, usedefault = 0;
  72         struct stat stb;
  73
  74         hdir = getenv("HOME");
  75         if (hdir == NULL)
  76                 hdir = ".";
  77         (void) sprintf(buf, "%s/.netrc", hdir);
  78         cfile = fopen(buf, "r");
  79         if (cfile == NULL) {
  80                 if (errno != ENOENT)
  81                         perror(buf);
  82                 return(0);
  83         }
  84
  85
  86                   if (gethostname(myname, sizeof(myname)) < 0)
  87                 myname[0] = '\0';
  88         if ((mydomain = index(myname, '.')) == NULL)
  89                 mydomain = "";
  90 next:
  91         while ((t = token())) switch(t) {
  92
  93         case DEFAULT:
  94                 usedefault = 1;
  95                 /* FALL THROUGH */
  96
  97         case MACH:
  98                 if (!usedefault) {
  99                         if (token() != ID)
 100                                 continue;
 101                         /*
 102                          * Allow match either for user's input host name
 103                          * or official hostname.  Also allow match of
 104                          * incompletely-specified host in local domain.
 105                          */
 106                         if (strcasecmp(host, tokval) == 0)
 107                                 goto match;
 108                         if (strcasecmp(hostname, tokval) == 0)
 109                                 goto match;
 110                         if ((tmp = index(hostname, '.')) != NULL &&
 111                                  strcasecmp(tmp, mydomain) == 0 &&
 112                                  strncasecmp(hostname, tokval, tmp - hostname) == 0 &&
 113                                  tokval[tmp - hostname] == '\0')
 114                                 goto match;
 115                         if ((tmp = index(host, '.')) != NULL &&
 116                                  strcasecmp(tmp, mydomain) == 0 &&
 117                                  strncasecmp(host, tokval, tmp - host) == 0 &&
 118                                  tokval[tmp - host] == '\0')
 119                                 goto match;
 120                         continue;
 121                 }
 122         match:
 123                 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
 124
 125                 case LOGIN:
 126                         if (token()) {
 127                                 if (*aname == 0) {
 128                                         *aname = malloc((unsigned) strlen(tokval) + 1);
 129                                         (void) strcpy(*aname, tokval);
 130                                 } else {
 131                                         if (strcmp(*aname, tokval))
 132                                                 goto next;
 133                                 }
 134                         }
 135                         break;
 136                 case PASSWD:
 137                         if (strcmp(*aname, "anonymous") &&
 138                             fstat(fileno(cfile), &stb) >= 0 &&
 139                             (stb.st_mode & 077) != 0) {
 140         fprintf(stderr, "Error - .netrc file not correct mode.\n");
 141         fprintf(stderr, "Remove password or correct mode.\n");
 142                                 goto bad;
 143                         }
 144                         if (token() && *apass == 0) {
 145                                 *apass = malloc((unsigned) strlen(tokval) + 1);
 146                                 (void) strcpy(*apass, tokval);
 147                         }
 148                         break;
 149                 case ACCOUNT:
 150                         if (fstat(fileno(cfile), &stb) >= 0
 151                             && (stb.st_mode & 077) != 0) {
 152         fprintf(stderr, "Error - .netrc file not correct mode.\n");
 153         fprintf(stderr, "Remove account or correct mode.\n");
 154                                 goto bad;
 155                         }
 156                         if (token() && *aacct == 0) {
 157                                 *aacct = malloc((unsigned) strlen(tokval) + 1);
 158                                 (void) strcpy(*aacct, tokval);
 159                         }
 160                         break;
 161                 case MACDEF:
 162                         if (proxy) {
 163                                 (void) fclose(cfile);
 164                                 return(0);
 165                         }
 166                         while ((c=getc(cfile)) != EOF && (c == ' ' || c == '\t'));
 167                         if (c == EOF || c == '\n') {
 168                                 printf("Missing macdef name argument.\n");
 169                                 goto bad;
 170                         }
 171                         if (macnum == 16) {
 172                                 printf("Limit of 16 macros have already been defined\n");
 173                                 goto bad;
 174                         }
 175                         tmp = macros[macnum].mac_name;
 176                         *tmp++ = c;
 177                         for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
 178                             !isspace(c); ++i) {
 179                                 *tmp++ = c;
 180                         }
 181                         if (c == EOF) {
 182                                 printf("Macro definition missing null line terminator.\n");
 183                                 goto bad;
 184                         }
 185                         *tmp = '\0';
 186                         if (c != '\n') {
 187                                 while ((c=getc(cfile)) != EOF && c != '\n');
 188                         }
 189                         if (c == EOF) {
 190                                 printf("Macro definition missing null line terminator.\n");
 191                                 goto bad;
 192                         }
 193                         if (macnum == 0) {
 194                                 macros[macnum].mac_start = macbuf;
 195                         }
 196                         else {
 197                                 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
 198                         }
 199                         tmp = macros[macnum].mac_start;
 200                         while (tmp != macbuf + 4096) {
 201                                 if ((c=getc(cfile)) == EOF) {
 202                                 printf("Macro definition missing null line terminator.\n");
 203                                         goto bad;
 204                                 }
 205                                 *tmp = c;
 206                                 if (*tmp == '\n') {
 207                                         if (*(tmp-1) == '\0') {
 208                                            macros[macnum++].mac_end = tmp - 1;
 209                                            break;
 210                                         }
 211                                         *tmp = '\0';
 212                                 }
 213                                 tmp++;
 214                         }
 215                         if (tmp == macbuf + 4096) {
 216                                 printf("4K macro buffer exceeded\n");
 217                                 goto bad;
 218                         }
 219                         break;
 220                 default:
 221         fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
 222                         break;
 223                 }
 224                 goto done;
 225         }
 226 done:
 227         (void) fclose(cfile);
 228         return(0);
 229 bad:
 230         (void) fclose(cfile);
 231         return(-1);
 232 }
 233
 234 static int token(void)
 235 {
 236    char *cp;
 237    int c;
 238    struct toktab *t;
 239
 240    if (feof(cfile))
 241       return (0);
 242    while ((c = getc(cfile)) != EOF &&
 243           (c == '\r' || c == '\n' || c == '\t' || c == ' ' || c == ','))
 244       continue;
 245    if (c == EOF)
 246       return (0);
 247    cp = tokval;
 248    if (c == '"') {
 249       while ((c = getc(cfile)) != EOF && c != '"') {
 250          if (c == '\\')
 251             c = getc(cfile);
 252          *cp++ = c;
 253       }
 254    } else {
 255       *cp++ = c;
 256       while ((c = getc(cfile)) != EOF
 257              && c != '\n' && c != '\t' && c != ' ' && c != ',' && c != '\r') {
 258          if (c == '\\')
 259             c = getc(cfile);
 260          *cp++ = c;
 261       }
 262    }
 263    *cp = 0;
 264    if (tokval[0] == 0)
 265       return (0);
 266    for (t = toktab; t->tokstr; t++)
 267       if (!strcmp(t->tokstr, tokval))
 268          return (t->tval);
 269    return (ID);
 270 }