]> rtime.felk.cvut.cz Git - l4.git/blob - l4/pkg/uclibc/lib/contrib/uclibc/libc/inet/rpc/ruserpass.c
update
[l4.git] / l4 / pkg / uclibc / lib / contrib / uclibc / libc / inet / rpc / 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  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #include <sys/types.h>
31 #include <sys/stat.h>
32
33 #include <ctype.h>
34 #include <err.h>
35 #include <errno.h>
36 #include <netdb.h>
37 #include <stdio.h>
38 #ifdef __UCLIBC_HAS_THREADS__
39 # include <stdio_ext.h>
40 #endif
41 #include <stdlib.h>
42 #include <string.h>
43 #include <unistd.h>
44 #include <libintl.h>
45
46 /* #include "ftp_var.h" */
47
48 static  int token (void);
49 static  FILE *cfile;
50
51 #define DEFAULT 1
52 #define LOGIN   2
53 #define PASSWD  3
54 #define ACCOUNT 4
55 #define MACDEF  5
56 #define ID      10
57 #define MACHINE 11
58
59 static char tokval[100];
60
61 static const char tokstr[] =
62 {
63 #define TOK_DEFAULT_IDX 0
64   "default\0"
65 #define TOK_LOGIN_IDX   (TOK_DEFAULT_IDX + sizeof "default")
66   "login\0"
67 #define TOK_PASSWORD_IDX (TOK_LOGIN_IDX + sizeof "login")
68   "password\0"
69 #define TOK_PASSWD_IDX  (TOK_PASSWORD_IDX + sizeof "password")
70   "passwd\0"
71 #define TOK_ACCOUNT_IDX (TOK_PASSWD_IDX + sizeof "passwd")
72   "account\0"
73 #define TOK_MACHINE_IDX (TOK_ACCOUNT_IDX + sizeof "account")
74   "machine\0"
75 #define TOK_MACDEF_IDX  (TOK_MACHINE_IDX + sizeof "machine")
76   "macdef"
77 };
78
79 static const struct toktab {
80         int tokstr_off;
81         int tval;
82 } toktab[]= {
83         { TOK_DEFAULT_IDX,      DEFAULT },
84         { TOK_LOGIN_IDX,        LOGIN },
85         { TOK_PASSWORD_IDX,     PASSWD },
86         { TOK_PASSWD_IDX,       PASSWD },
87         { TOK_ACCOUNT_IDX,      ACCOUNT },
88         { TOK_MACHINE_IDX,      MACHINE },
89         { TOK_MACDEF_IDX,       MACDEF }
90 };
91
92
93 /* ruserpass - remote password check.
94    This function also exists in glibc but is undocumented */
95 int ruserpass(const char *host, const char **aname, const char **apass)
96 {
97         char *hdir, *buf, *tmp;
98         char myname[1024], *mydomain;
99         int t, usedefault = 0;
100         struct stat stb;
101
102         /* Give up when running a setuid or setgid app. */
103         if ((getuid() != geteuid()) || getgid() != getegid())
104             return -1;
105         hdir = getenv("HOME");
106         if (hdir == NULL) {
107                 /* If we can't get HOME, fail instead of trying ".",
108                    which is no improvement. */
109                 return -1;
110         }
111
112         buf = alloca (strlen(hdir) + 8);
113         strcpy(buf, hdir);
114         strcat(buf, "/.netrc");
115         cfile = fopen(buf, "r");
116         if (cfile == NULL) {
117                 if (errno != ENOENT)
118                         printf("%s", buf);
119                 return (0);
120         }
121         /* No threads use this stream.  */
122 #ifdef __UCLIBC_HAS_THREADS__
123         __fsetlocking (cfile, FSETLOCKING_BYCALLER);
124 #endif
125         if (gethostname(myname, sizeof(myname)) < 0)
126                 myname[0] = '\0';
127         mydomain = strchr(myname, '.');
128         if (mydomain==NULL) {
129             mydomain=myname + strlen(myname);
130         }
131 next:
132         while ((t = token())) switch(t) {
133
134         case DEFAULT:
135                 usedefault = 1;
136                 /* FALL THROUGH */
137
138         case MACHINE:
139                 if (!usedefault) {
140                         if (token() != ID)
141                                 continue;
142                         /*
143                          * Allow match either for user's input host name
144                          * or official hostname.  Also allow match of
145                          * incompletely-specified host in local domain.
146                          */
147                         if (strcasecmp(host, tokval) == 0)
148                                 goto match;
149                         if ((tmp = strchr(host, '.')) != NULL &&
150                             strcasecmp(tmp, mydomain) == 0 &&
151                             strncasecmp(host, tokval, tmp - host) == 0 &&
152                             tokval[tmp - host] == '\0')
153                                 goto match;
154                         continue;
155                 }
156         match:
157                 while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {
158
159                 case LOGIN:
160                         if (token()) {
161                                 if (*aname == 0) {
162                                   char *newp;
163                                   newp = malloc((unsigned) strlen(tokval) + 1);
164                                   if (newp == NULL)
165                                     {
166                                       printf(_("out of memory"));
167                                       goto bad;
168                                     }
169                                   *aname = strcpy(newp, tokval);
170                                 } else {
171                                         if (strcmp(*aname, tokval))
172                                                 goto next;
173                                 }
174                         }
175                         break;
176                 case PASSWD:
177                         if (strcmp(*aname, "anonymous") &&
178                             fstat(fileno(cfile), &stb) >= 0 &&
179                             (stb.st_mode & 077) != 0) {
180         printf(_("Error: .netrc file is readable by others."));
181         printf(_("Remove password or make file unreadable by others."));
182                                 goto bad;
183                         }
184                         if (token() && *apass == 0) {
185                                 char *newp;
186                                 newp = malloc((unsigned) strlen(tokval) + 1);
187                                 if (newp == NULL)
188                                   {
189                                     printf(_("out of memory"));
190                                     goto bad;
191                                   }
192                                 *apass = strcpy(newp, tokval);
193                         }
194                         break;
195                 case ACCOUNT:
196 #if 0
197                         if (fstat(fileno(cfile), &stb) >= 0
198                             && (stb.st_mode & 077) != 0) {
199         printf("Error: .netrc file is readable by others.");
200         printf("Remove account or make file unreadable by others.");
201                                 goto bad;
202                         }
203                         if (token() && *aacct == 0) {
204                                 *aacct = malloc((unsigned) strlen(tokval) + 1);
205                                 (void) strcpy(*aacct, tokval);
206                         }
207 #endif
208                         break;
209                 case MACDEF:
210 #if 0
211                         if (proxy) {
212                                 (void) fclose(cfile);
213                                 return (0);
214                         }
215                         while ((c=getc_unlocked(cfile)) != EOF && c == ' '
216                                || c == '\t');
217                         if (c == EOF || c == '\n') {
218                                 printf("Missing macdef name argument.\n");
219                                 goto bad;
220                         }
221                         if (macnum == 16) {
222                                 printf("Limit of 16 macros have already been defined\n");
223                                 goto bad;
224                         }
225                         tmp = macros[macnum].mac_name;
226                         *tmp++ = c;
227                         for (i=0; i < 8 && (c=getc_unlocked(cfile)) != EOF &&
228                             !isspace(c); ++i) {
229                                 *tmp++ = c;
230                         }
231                         if (c == EOF) {
232                                 printf("Macro definition missing null line terminator.\n");
233                                 goto bad;
234                         }
235                         *tmp = '\0';
236                         if (c != '\n') {
237                                 while ((c=getc_unlocked(cfile)) != EOF
238                                        && c != '\n');
239                         }
240                         if (c == EOF) {
241                                 printf("Macro definition missing null line terminator.\n");
242                                 goto bad;
243                         }
244                         if (macnum == 0) {
245                                 macros[macnum].mac_start = macbuf;
246                         }
247                         else {
248                                 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
249                         }
250                         tmp = macros[macnum].mac_start;
251                         while (tmp != macbuf + 4096) {
252                                 if ((c=getc_unlocked(cfile)) == EOF) {
253                                 printf("Macro definition missing null line terminator.\n");
254                                         goto bad;
255                                 }
256                                 *tmp = c;
257                                 if (*tmp == '\n') {
258                                         if (*(tmp-1) == '\0') {
259                                            macros[macnum++].mac_end = tmp - 1;
260                                            break;
261                                         }
262                                         *tmp = '\0';
263                                 }
264                                 tmp++;
265                         }
266                         if (tmp == macbuf + 4096) {
267                                 printf("4K macro buffer exceeded\n");
268                                 goto bad;
269                         }
270 #endif
271                         break;
272                 default:
273                         printf(_("Unknown .netrc keyword %s"), tokval);
274                         break;
275                 }
276                 goto done;
277         }
278 done:
279         (void) fclose(cfile);
280         return (0);
281 bad:
282         (void) fclose(cfile);
283         return (-1);
284 }
285 libc_hidden_def(ruserpass)
286
287 static int
288 token(void)
289 {
290         char *cp;
291         int c;
292         int i;
293
294         if (feof_unlocked(cfile) || ferror_unlocked(cfile))
295                 return (0);
296         while ((c = getc_unlocked(cfile)) != EOF &&
297             (c == '\n' || c == '\t' || c == ' ' || c == ','))
298                 continue;
299         if (c == EOF)
300                 return (0);
301         cp = tokval;
302         if (c == '"') {
303                 while ((c = getc_unlocked(cfile)) != EOF && c != '"') {
304                         if (c == '\\')
305                                 c = getc_unlocked(cfile);
306                         *cp++ = c;
307                 }
308         } else {
309                 *cp++ = c;
310                 while ((c = getc_unlocked(cfile)) != EOF
311                     && c != '\n' && c != '\t' && c != ' ' && c != ',') {
312                         if (c == '\\')
313                                 c = getc_unlocked(cfile);
314                         *cp++ = c;
315                 }
316         }
317         *cp = 0;
318         if (tokval[0] == 0)
319                 return (0);
320         for (i = 0; i < (int) (sizeof (toktab) / sizeof (toktab[0])); ++i)
321                 if (!strcmp(&tokstr[toktab[i].tokstr_off], tokval))
322                         return toktab[i].tval;
323         return (ID);
324 }