inet/ruserpass.c

   1 /*
   2  * Copyright (c) 1985, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static char sccsid[] = "@(#)ruserpass.c 8.3 (Berkeley) 4/2/94";
  36 #endif /* not lint */
  37
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40
  41 #include <assert.h>
  42 #include <ctype.h>
  43 #include <err.h>
  44 #include <errno.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <unistd.h>
  49
  50 /* #include "ftp_var.h" */
  51
  52 static  int token __P((void));
  53 static  FILE *cfile;
  54
  55 #define DEFAULT 1
  56 #define LOGIN   2
  57 #define PASSWD  3
  58 #define ACCOUNT 4
  59 #define MACDEF  5
  60 #define ID      10
  61 #define MACHINE 11
  62
  63 static char tokval[100];
  64
  65 static struct toktab {
  66         char *tokstr;
  67         int tval;
  68 } toktab[]= {
  69         { "default",    DEFAULT },
  70         { "login",      LOGIN },
  71         { "password",   PASSWD },
  72         { "passwd",     PASSWD },
  73         { "account",    ACCOUNT },
  74         { "machine",    MACHINE },
  75         { "macdef",     MACDEF },
  76         { NULL,         0 }
  77 };
  78
  79
  80
  81 int
  82 ruserpass(host, aname, apass)
  83         char *host, **aname, **apass;
  84 {
  85         char *hdir, *buf, *tmp;
  86         char myname[1024], *mydomain;
  87         int t, i, c, usedefault = 0;
  88         struct stat stb;
  89
  90         hdir = getenv("HOME");
  91         if (hdir == NULL)
  92                 hdir = ".";
  93
  94         buf = alloca (strlen (hdir) + 8);
  95
  96         (void) sprintf(buf, "%s/.netrc", hdir);
  97         cfile = fopen(buf, "r");
  98         if (cfile == NULL) {
  99                 if (errno != ENOENT)
 100                         warn("%s", buf);
 101                 return (0);
 102         }
 103         if (gethostname(myname, sizeof(myname)) < 0)
 104                 myname[0] = '\0';
 105         if ((mydomain = strchr(myname, '.')) == NULL)
 106                 mydomain = "";
 107 next:
 108         while ((t = token())) switch(t) {
 109
 110         case DEFAULT:
 111                 usedefault = 1;
 112                 /* FALL THROUGH */
 113
 114         case MACHINE:
 115                 if (!usedefault) {
 116                         if (token() != ID)
 117                                 continue;
 118                         /*
 119                          * Allow match either for user's input host name
 120                          * or official hostname.  Also allow match of
 121                          * incompletely-specified host in local domain.
 122                          */
 123                         if (strcasecmp(host, tokval) == 0)
 124                                 goto match;
 125 /*                      if (strcasecmp(hostname, tokval) == 0)
 126                                 goto match;
 127                         if ((tmp = strchr(hostname, '.')) != NULL &&
 128                             strcasecmp(tmp, mydomain) == 0 &&
 129                             strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
 130                             tokval[tmp - hostname] == '\0')
 131                                 goto match; */
 132                         if ((tmp = strchr(host, '.')) != NULL &&
 133                             strcasecmp(tmp, mydomain) == 0 &&
 134                             strncasecmp(host, tokval, tmp - host) == 0 &&
 135                             tokval[tmp - host] == '\0')
 136                                 goto match;
 137                         continue;
 138                 }
 139         match:
 140                 while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {
 141
 142                 case LOGIN:
 143                         if (token())
 144                                 if (*aname == 0) {
 145                                         *aname = malloc((unsigned) strlen(tokval) + 1);
 146                                         (void) strcpy(*aname, tokval);
 147                                 } else {
 148                                         if (strcmp(*aname, tokval))
 149                                                 goto next;
 150                                 }
 151                         break;
 152                 case PASSWD:
 153                         if (strcmp(*aname, "anonymous") &&
 154                             fstat(fileno(cfile), &stb) >= 0 &&
 155                             (stb.st_mode & 077) != 0) {
 156         warnx(_("Error: .netrc file is readable by others."));
 157         warnx(_("Remove password or make file unreadable by others."));
 158                                 goto bad;
 159                         }
 160                         if (token() && *apass == 0) {
 161                                 *apass = malloc((unsigned) strlen(tokval) + 1);
 162                                 (void) strcpy(*apass, tokval);
 163                         }
 164                         break;
 165                 case ACCOUNT:
 166 #if 0
 167                         if (fstat(fileno(cfile), &stb) >= 0
 168                             && (stb.st_mode & 077) != 0) {
 169         warnx("Error: .netrc file is readable by others.");
 170         warnx("Remove account or make file unreadable by others.");
 171                                 goto bad;
 172                         }
 173                         if (token() && *aacct == 0) {
 174                                 *aacct = malloc((unsigned) strlen(tokval) + 1);
 175                                 (void) strcpy(*aacct, tokval);
 176                         }
 177 #endif
 178                         break;
 179                 case MACDEF:
 180 #if 0
 181                         if (proxy) {
 182                                 (void) fclose(cfile);
 183                                 return (0);
 184                         }
 185                         while ((c=getc(cfile)) != EOF && c == ' ' || c == '\t');
 186                         if (c == EOF || c == '\n') {
 187                                 printf("Missing macdef name argument.\n");
 188                                 goto bad;
 189                         }
 190                         if (macnum == 16) {
 191                                 printf("Limit of 16 macros have already been defined\n");
 192                                 goto bad;
 193                         }
 194                         tmp = macros[macnum].mac_name;
 195                         *tmp++ = c;
 196                         for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
 197                             !isspace(c); ++i) {
 198                                 *tmp++ = c;
 199                         }
 200                         if (c == EOF) {
 201                                 printf("Macro definition missing null line terminator.\n");
 202                                 goto bad;
 203                         }
 204                         *tmp = '\0';
 205                         if (c != '\n') {
 206                                 while ((c=getc(cfile)) != EOF && c != '\n');
 207                         }
 208                         if (c == EOF) {
 209                                 printf("Macro definition missing null line terminator.\n");
 210                                 goto bad;
 211                         }
 212                         if (macnum == 0) {
 213                                 macros[macnum].mac_start = macbuf;
 214                         }
 215                         else {
 216                                 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
 217                         }
 218                         tmp = macros[macnum].mac_start;
 219                         while (tmp != macbuf + 4096) {
 220                                 if ((c=getc(cfile)) == EOF) {
 221                                 printf("Macro definition missing null line terminator.\n");
 222                                         goto bad;
 223                                 }
 224                                 *tmp = c;
 225                                 if (*tmp == '\n') {
 226                                         if (*(tmp-1) == '\0') {
 227                                            macros[macnum++].mac_end = tmp - 1;
 228                                            break;
 229                                         }
 230                                         *tmp = '\0';
 231                                 }
 232                                 tmp++;
 233                         }
 234                         if (tmp == macbuf + 4096) {
 235                                 printf("4K macro buffer exceeded\n");
 236                                 goto bad;
 237                         }
 238 #endif
 239                         break;
 240                 default:
 241                         warnx(_("Unknown .netrc keyword %s"), tokval);
 242                         break;
 243                 }
 244                 goto done;
 245         }
 246 done:
 247         (void) fclose(cfile);
 248         return (0);
 249 bad:
 250         (void) fclose(cfile);
 251         return (-1);
 252 }
 253
 254 static int
 255 token()
 256 {
 257         char *cp;
 258         int c;
 259         struct toktab *t;
 260
 261         if (feof(cfile) || ferror(cfile))
 262                 return (0);
 263         while ((c = getc(cfile)) != EOF &&
 264             (c == '\n' || c == '\t' || c == ' ' || c == ','))
 265                 continue;
 266         if (c == EOF)
 267                 return (0);
 268         cp = tokval;
 269         if (c == '"') {
 270                 while ((c = getc(cfile)) != EOF && c != '"') {
 271                         if (c == '\\')
 272                                 c = getc(cfile);
 273                         *cp++ = c;
 274                 }
 275         } else {
 276                 *cp++ = c;
 277                 while ((c = getc(cfile)) != EOF
 278                     && c != '\n' && c != '\t' && c != ' ' && c != ',') {
 279                         if (c == '\\')
 280                                 c = getc(cfile);
 281                         *cp++ = c;
 282                 }
 283         }
 284         *cp = 0;
 285         if (tokval[0] == 0)
 286                 return (0);
 287         for (t = toktab; t->tokstr; t++)
 288                 if (!strcmp(t->tokstr, tokval))
 289                         return (t->tval);
 290         return (ID);
 291 }