ftp.tproj/ruserpass.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1985, 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #include <sys/types.h>
  58 #include <sys/stat.h>
  59
  60 #include <ctype.h>
  61 #include <err.h>
  62 #include <errno.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67
  68 #include "ftp_var.h"
  69
  70 static  int token __P((void));
  71 static  FILE *cfile;
  72
  73 #define DEFAULT 1
  74 #define LOGIN   2
  75 #define PASSWD  3
  76 #define ACCOUNT 4
  77 #define MACDEF  5
  78 #define ID      10
  79 #define MACH    11
  80
  81 static char tokval[100];
  82
  83 static struct toktab {
  84         char *tokstr;
  85         int tval;
  86 } toktab[]= {
  87         { "default",    DEFAULT },
  88         { "login",      LOGIN },
  89         { "password",   PASSWD },
  90         { "passwd",     PASSWD },
  91         { "account",    ACCOUNT },
  92         { "machine",    MACH },
  93         { "macdef",     MACDEF },
  94         { NULL,         0 }
  95 };
  96
  97 int
  98 ruserpass(host, aname, apass, aacct)
  99         char *host, **aname, **apass, **aacct;
 100 {
 101         char *hdir, buf[BUFSIZ], *tmp;
 102         char myname[MAXHOSTNAMELEN], *mydomain;
 103         int t, i, c, usedefault = 0;
 104         struct stat stb;
 105
 106         hdir = getenv("HOME");
 107         if (hdir == NULL)
 108                 hdir = ".";
 109         (void) sprintf(buf, "%s/.netrc", hdir);
 110         cfile = fopen(buf, "r");
 111         if (cfile == NULL) {
 112                 if (errno != ENOENT)
 113                         warn("%s", buf);
 114                 return (0);
 115         }
 116         if (gethostname(myname, sizeof(myname)) < 0)
 117                 myname[0] = '\0';
 118         if ((mydomain = strchr(myname, '.')) == NULL)
 119                 mydomain = "";
 120 next:
 121         while ((t = token())) switch(t) {
 122
 123         case DEFAULT:
 124                 usedefault = 1;
 125                 /* FALL THROUGH */
 126
 127         case MACH:
 128                 if (!usedefault) {
 129                         if (token() != ID)
 130                                 continue;
 131                         /*
 132                          * Allow match either for user's input host name
 133                          * or official hostname.  Also allow match of
 134                          * incompletely-specified host in local domain.
 135                          */
 136                         if (strcasecmp(host, tokval) == 0)
 137                                 goto match;
 138                         if (strcasecmp(hostname, tokval) == 0)
 139                                 goto match;
 140                         if ((tmp = strchr(hostname, '.')) != NULL &&
 141                             strcasecmp(tmp, mydomain) == 0 &&
 142                             strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
 143                             tokval[tmp - hostname] == '\0')
 144                                 goto match;
 145                         if ((tmp = strchr(host, '.')) != NULL &&
 146                             strcasecmp(tmp, mydomain) == 0 &&
 147                             strncasecmp(host, tokval, tmp - host) == 0 &&
 148                             tokval[tmp - host] == '\0')
 149                                 goto match;
 150                         continue;
 151                 }
 152         match:
 153                 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
 154
 155                 case LOGIN:
 156                         if (token())
 157                                 if (*aname == 0) {
 158                                         *aname = malloc((unsigned) strlen(tokval) + 1);
 159                                         (void) strcpy(*aname, tokval);
 160                                 } else {
 161                                         if (strcmp(*aname, tokval))
 162                                                 goto next;
 163                                 }
 164                         break;
 165                 case PASSWD:
 166                         if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
 167                             fstat(fileno(cfile), &stb) >= 0 &&
 168                             (stb.st_mode & 077) != 0) {
 169         warnx("Error: .netrc file is readable by others.");
 170         warnx("Remove password or make file unreadable by others.");
 171                                 goto bad;
 172                         }
 173                         if (token() && *apass == 0) {
 174                                 *apass = malloc((unsigned) strlen(tokval) + 1);
 175                                 (void) strcpy(*apass, tokval);
 176                         }
 177                         break;
 178                 case ACCOUNT:
 179                         if (fstat(fileno(cfile), &stb) >= 0
 180                             && (stb.st_mode & 077) != 0) {
 181         warnx("Error: .netrc file is readable by others.");
 182         warnx("Remove account or make file unreadable by others.");
 183                                 goto bad;
 184                         }
 185                         if (token() && *aacct == 0) {
 186                                 *aacct = malloc((unsigned) strlen(tokval) + 1);
 187                                 (void) strcpy(*aacct, tokval);
 188                         }
 189                         break;
 190                 case MACDEF:
 191                         if (proxy) {
 192                                 (void) fclose(cfile);
 193                                 return (0);
 194                         }
 195                         while ((c=getc(cfile)) != EOF && c == ' ' || c == '\t');
 196                         if (c == EOF || c == '\n') {
 197                                 printf("Missing macdef name argument.\n");
 198                                 goto bad;
 199                         }
 200                         if (macnum == 16) {
 201                                 printf("Limit of 16 macros have already been defined\n");
 202                                 goto bad;
 203                         }
 204                         tmp = macros[macnum].mac_name;
 205                         *tmp++ = c;
 206                         for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
 207                             !isspace(c); ++i) {
 208                                 *tmp++ = c;
 209                         }
 210                         if (c == EOF) {
 211                                 printf("Macro definition missing null line terminator.\n");
 212                                 goto bad;
 213                         }
 214                         *tmp = '\0';
 215                         if (c != '\n') {
 216                                 while ((c=getc(cfile)) != EOF && c != '\n');
 217                         }
 218                         if (c == EOF) {
 219                                 printf("Macro definition missing null line terminator.\n");
 220                                 goto bad;
 221                         }
 222                         if (macnum == 0) {
 223                                 macros[macnum].mac_start = macbuf;
 224                         }
 225                         else {
 226                                 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
 227                         }
 228                         tmp = macros[macnum].mac_start;
 229                         while (tmp != macbuf + 4096) {
 230                                 if ((c=getc(cfile)) == EOF) {
 231                                 printf("Macro definition missing null line terminator.\n");
 232                                         goto bad;
 233                                 }
 234                                 *tmp = c;
 235                                 if (*tmp == '\n') {
 236                                         if (*(tmp-1) == '\0') {
 237                                            macros[macnum++].mac_end = tmp - 1;
 238                                            break;
 239                                         }
 240                                         *tmp = '\0';
 241                                 }
 242                                 tmp++;
 243                         }
 244                         if (tmp == macbuf + 4096) {
 245                                 printf("4K macro buffer exceeded\n");
 246                                 goto bad;
 247                         }
 248                         break;
 249                 default:
 250                         warnx("Unknown .netrc keyword %s", tokval);
 251                         break;
 252                 }
 253                 goto done;
 254         }
 255 done:
 256         (void) fclose(cfile);
 257         return (0);
 258 bad:
 259         (void) fclose(cfile);
 260         return (-1);
 261 }
 262
 263 static int
 264 token()
 265 {
 266         char *cp;
 267         int c;
 268         struct toktab *t;
 269
 270         if (feof(cfile) || ferror(cfile))
 271                 return (0);
 272         while ((c = getc(cfile)) != EOF &&
 273             (c == '\n' || c == '\t' || c == ' ' || c == ','))
 274                 continue;
 275         if (c == EOF)
 276                 return (0);
 277         cp = tokval;
 278         if (c == '"') {
 279                 while ((c = getc(cfile)) != EOF && c != '"') {
 280                         if (c == '\\')
 281                                 c = getc(cfile);
 282                         *cp++ = c;
 283                 }
 284         } else {
 285                 *cp++ = c;
 286                 while ((c = getc(cfile)) != EOF
 287                     && c != '\n' && c != '\t' && c != ' ' && c != ',') {
 288                         if (c == '\\')
 289                                 c = getc(cfile);
 290                         *cp++ = c;
 291                 }
 292         }
 293         *cp = 0;
 294         if (tokval[0] == 0)
 295                 return (0);
 296         for (t = toktab; t->tokstr; t++)
 297                 if (!strcmp(t->tokstr, tokval))
 298                         return (t->tval);
 299         return (ID);
 300 }