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[glibc.git] / inet / ruserpass.c
blobd610f4240d1cac575d8bc7a65c6ae4b6c655317c
1 /*
2 * Copyright (c) 1985, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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.
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.
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)ruserpass.c 8.3 (Berkeley) 4/2/94";
32 #endif /* not lint */
34 #include <sys/types.h>
35 #include <sys/stat.h>
37 #include <ctype.h>
38 #include <err.h>
39 #include <errno.h>
40 #include <netdb.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45 #include <libintl.h>
47 /* #include "ftp_var.h" */
49 static int token (void);
50 static FILE *cfile;
52 #define DEFAULT 1
53 #define LOGIN 2
54 #define PASSWD 3
55 #define ACCOUNT 4
56 #define MACDEF 5
57 #define ID 10
58 #define MACHINE 11
60 static char tokval[100];
62 static const char tokstr[] =
64 #define TOK_DEFAULT_IDX 0
65 "default\0"
66 #define TOK_LOGIN_IDX (TOK_DEFAULT_IDX + sizeof "default")
67 "login\0"
68 #define TOK_PASSWORD_IDX (TOK_LOGIN_IDX + sizeof "login")
69 "password\0"
70 #define TOK_PASSWD_IDX (TOK_PASSWORD_IDX + sizeof "password")
71 "passwd\0"
72 #define TOK_ACCOUNT_IDX (TOK_PASSWD_IDX + sizeof "passwd")
73 "account\0"
74 #define TOK_MACHINE_IDX (TOK_ACCOUNT_IDX + sizeof "account")
75 "machine\0"
76 #define TOK_MACDEF_IDX (TOK_MACHINE_IDX + sizeof "machine")
77 "macdef"
80 static const struct toktab {
81 int tokstr_off;
82 int tval;
83 } toktab[]= {
84 { TOK_DEFAULT_IDX, DEFAULT },
85 { TOK_LOGIN_IDX, LOGIN },
86 { TOK_PASSWORD_IDX, PASSWD },
87 { TOK_PASSWD_IDX, PASSWD },
88 { TOK_ACCOUNT_IDX, ACCOUNT },
89 { TOK_MACHINE_IDX, MACHINE },
90 { TOK_MACDEF_IDX, MACDEF }
95 int
96 ruserpass(host, aname, apass)
97 const char *host, **aname, **apass;
99 char *hdir, *buf, *tmp;
100 char myname[1024], *mydomain;
101 int t, usedefault = 0;
102 struct stat64 stb;
104 hdir = __secure_getenv("HOME");
105 if (hdir == NULL) {
106 /* If we can't get HOME, fail instead of trying ".",
107 which is no improvement. This really should call
108 getpwuid(getuid()). */
109 /*hdir = ".";*/
110 return -1;
113 buf = alloca (strlen (hdir) + 8);
115 __stpcpy (__stpcpy (buf, hdir), "/.netrc");
116 cfile = fopen(buf, "r");
117 if (cfile == NULL) {
118 if (errno != ENOENT)
119 warn("%s", buf);
120 return (0);
122 if (__gethostname(myname, sizeof(myname)) < 0)
123 myname[0] = '\0';
124 mydomain = __strchrnul(myname, '.');
125 next:
126 while ((t = token())) switch(t) {
128 case DEFAULT:
129 usedefault = 1;
130 /* FALL THROUGH */
132 case MACHINE:
133 if (!usedefault) {
134 if (token() != ID)
135 continue;
137 * Allow match either for user's input host name
138 * or official hostname. Also allow match of
139 * incompletely-specified host in local domain.
141 if (__strcasecmp(host, tokval) == 0)
142 goto match;
143 /* if (__strcasecmp(hostname, tokval) == 0)
144 goto match;
145 if ((tmp = strchr(hostname, '.')) != NULL &&
146 __strcasecmp(tmp, mydomain) == 0 &&
147 __strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
148 tokval[tmp - hostname] == '\0')
149 goto match; */
150 if ((tmp = strchr(host, '.')) != NULL &&
151 __strcasecmp(tmp, mydomain) == 0 &&
152 __strncasecmp(host, tokval, tmp - host) == 0 &&
153 tokval[tmp - host] == '\0')
154 goto match;
155 continue;
157 match:
158 while ((t = token()) && t != MACHINE && t != DEFAULT) switch(t) {
160 case LOGIN:
161 if (token()) {
162 if (*aname == 0) {
163 char *newp;
164 newp = malloc((unsigned) strlen(tokval) + 1);
165 if (newp == NULL)
167 warnx(_("out of memory"));
168 goto bad;
170 *aname = strcpy(newp, tokval);
171 } else {
172 if (strcmp(*aname, tokval))
173 goto next;
176 break;
177 case PASSWD:
178 if (strcmp(*aname, "anonymous") &&
179 fstat64(fileno(cfile), &stb) >= 0 &&
180 (stb.st_mode & 077) != 0) {
181 warnx(_("Error: .netrc file is readable by others."));
182 warnx(_("Remove password or make file unreadable by others."));
183 goto bad;
185 if (token() && *apass == 0) {
186 char *newp;
187 newp = malloc((unsigned) strlen(tokval) + 1);
188 if (newp == NULL)
190 warnx(_("out of memory"));
191 goto bad;
193 *apass = strcpy(newp, tokval);
195 break;
196 case ACCOUNT:
197 #if 0
198 if (fstat64(fileno(cfile), &stb) >= 0
199 && (stb.st_mode & 077) != 0) {
200 warnx("Error: .netrc file is readable by others.");
201 warnx("Remove account or make file unreadable by others.");
202 goto bad;
204 if (token() && *aacct == 0) {
205 *aacct = malloc((unsigned) strlen(tokval) + 1);
206 (void) strcpy(*aacct, tokval);
208 #endif
209 break;
210 case MACDEF:
211 #if 0
212 if (proxy) {
213 (void) fclose(cfile);
214 return (0);
216 while ((c=getc_unlocked(cfile)) != EOF && c == ' '
217 || c == '\t');
218 if (c == EOF || c == '\n') {
219 printf("Missing macdef name argument.\n");
220 goto bad;
222 if (macnum == 16) {
223 printf("Limit of 16 macros have already been defined\n");
224 goto bad;
226 tmp = macros[macnum].mac_name;
227 *tmp++ = c;
228 for (i=0; i < 8 && (c=getc_unlocked(cfile)) != EOF &&
229 !isspace(c); ++i) {
230 *tmp++ = c;
232 if (c == EOF) {
233 printf("Macro definition missing null line terminator.\n");
234 goto bad;
236 *tmp = '\0';
237 if (c != '\n') {
238 while ((c=getc_unlocked(cfile)) != EOF
239 && c != '\n');
241 if (c == EOF) {
242 printf("Macro definition missing null line terminator.\n");
243 goto bad;
245 if (macnum == 0) {
246 macros[macnum].mac_start = macbuf;
248 else {
249 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
251 tmp = macros[macnum].mac_start;
252 while (tmp != macbuf + 4096) {
253 if ((c=getc_unlocked(cfile)) == EOF) {
254 printf("Macro definition missing null line terminator.\n");
255 goto bad;
257 *tmp = c;
258 if (*tmp == '\n') {
259 if (*(tmp-1) == '\0') {
260 macros[macnum++].mac_end = tmp - 1;
261 break;
263 *tmp = '\0';
265 tmp++;
267 if (tmp == macbuf + 4096) {
268 printf("4K macro buffer exceeded\n");
269 goto bad;
271 #endif
272 break;
273 default:
274 warnx(_("Unknown .netrc keyword %s"), tokval);
275 break;
277 goto done;
279 done:
280 (void) fclose(cfile);
281 return (0);
282 bad:
283 (void) fclose(cfile);
284 return (-1);
287 static int
288 token()
290 char *cp;
291 int c;
292 int i;
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;
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;
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);