1 /* $NetBSD: ruserpass.c,v 1.8 2007/08/06 04:33:24 lukem Exp $ */
2 /* from NetBSD: ruserpass.c,v 1.33 2007/04/17 05:52:04 lukem Exp */
3
4 /*
5 * Copyright (c) 1985, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include "tnftp.h"
34
35 #if 0 /* tnftp */
36
37 #include <sys/cdefs.h>
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95";
41 #else
42 __RCSID(" NetBSD: ruserpass.c,v 1.33 2007/04/17 05:52:04 lukem Exp ");
43 #endif
44 #endif /* not lint */
45
46 #include <sys/types.h>
47 #include <sys/stat.h>
48
49 #include <ctype.h>
50 #include <err.h>
51 #include <errno.h>
52 #include <netdb.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <unistd.h>
57
58 #endif /* tnftp */
59
60 #include "ftp_var.h"
61
62 static int token(void);
63 static FILE *cfile;
64
65 #define DEFAULT 1
66 #define LOGIN 2
67 #define PASSWD 3
68 #define ACCOUNT 4
69 #define MACDEF 5
70 #define ID 10
71 #define MACH 11
72
73 static char tokval[100];
74
75 static struct toktab {
76 const char *tokstr;
77 int tval;
78 } toktab[] = {
79 { "default", DEFAULT },
80 { "login", LOGIN },
81 { "password", PASSWD },
82 { "passwd", PASSWD },
83 { "account", ACCOUNT },
84 { "machine", MACH },
85 { "macdef", MACDEF },
86 { NULL, 0 }
87 };
88
89 int
ruserpass(const char * host,char ** aname,char ** apass,char ** aacct)90 ruserpass(const char *host, char **aname, char **apass, char **aacct)
91 {
92 char *tmp;
93 const char *mydomain;
94 char myname[MAXHOSTNAMELEN + 1];
95 int t, i, c, usedefault = 0;
96 struct stat stb;
97
98 if (netrc[0] == '\0')
99 return (0);
100 cfile = fopen(netrc, "r");
101 if (cfile == NULL) {
102 if (errno != ENOENT)
103 warn("Can't read `%s'", netrc);
104 return (0);
105 }
106 if (gethostname(myname, sizeof(myname)) < 0)
107 myname[0] = '\0';
108 myname[sizeof(myname) - 1] = '\0';
109 if ((mydomain = strchr(myname, '.')) == NULL)
110 mydomain = "";
111 next:
112 while ((t = token()) > 0) switch(t) {
113
114 case DEFAULT:
115 usedefault = 1;
116 /* FALL THROUGH */
117
118 case MACH:
119 if (!usedefault) {
120 if ((t = token()) == -1)
121 goto bad;
122 if (t != ID)
123 continue;
124 /*
125 * Allow match either for user's input host name
126 * or official hostname. Also allow match of
127 * incompletely-specified host in local domain.
128 */
129 if (strcasecmp(host, tokval) == 0)
130 goto match;
131 if (strcasecmp(hostname, tokval) == 0)
132 goto match;
133 if ((tmp = strchr(hostname, '.')) != NULL &&
134 strcasecmp(tmp, mydomain) == 0 &&
135 strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
136 tokval[tmp - hostname] == '\0')
137 goto match;
138 if ((tmp = strchr(host, '.')) != NULL &&
139 strcasecmp(tmp, mydomain) == 0 &&
140 strncasecmp(host, tokval, tmp - host) == 0 &&
141 tokval[tmp - host] == '\0')
142 goto match;
143 continue;
144 }
145 match:
146 while ((t = token()) > 0 &&
147 t != MACH && t != DEFAULT) switch(t) {
148
149 case LOGIN:
150 if ((t = token()) == -1)
151 goto bad;
152 if (t) {
153 if (*aname == NULL)
154 *aname = ftp_strdup(tokval);
155 else {
156 if (strcmp(*aname, tokval))
157 goto next;
158 }
159 }
160 break;
161 case PASSWD:
162 if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
163 fstat(fileno(cfile), &stb) >= 0 &&
164 (stb.st_mode & 077) != 0) {
165 warnx("Error: .netrc file is readable by others");
166 warnx("Remove password or make file unreadable by others");
167 goto bad;
168 }
169 if ((t = token()) == -1)
170 goto bad;
171 if (t && *apass == NULL)
172 *apass = ftp_strdup(tokval);
173 break;
174 case ACCOUNT:
175 if (fstat(fileno(cfile), &stb) >= 0
176 && (stb.st_mode & 077) != 0) {
177 warnx("Error: .netrc file is readable by others");
178 warnx("Remove account or make file unreadable by others");
179 goto bad;
180 }
181 if ((t = token()) == -1)
182 goto bad;
183 if (t && *aacct == NULL)
184 *aacct = ftp_strdup(tokval);
185 break;
186 case MACDEF:
187 if (proxy) {
188 (void)fclose(cfile);
189 return (0);
190 }
191 while ((c = getc(cfile)) != EOF)
192 if (c != ' ' && c != '\t')
193 break;
194 if (c == EOF || c == '\n') {
195 fputs("Missing macdef name argument.\n",
196 ttyout);
197 goto bad;
198 }
199 if (macnum == 16) {
200 fputs(
201 "Limit of 16 macros have already been defined.\n",
202 ttyout);
203 goto bad;
204 }
205 tmp = macros[macnum].mac_name;
206 *tmp++ = c;
207 for (i = 0; i < 8 && (c = getc(cfile)) != EOF &&
208 !isspace(c); ++i) {
209 *tmp++ = c;
210 }
211 if (c == EOF) {
212 fputs(
213 "Macro definition missing null line terminator.\n",
214 ttyout);
215 goto bad;
216 }
217 *tmp = '\0';
218 if (c != '\n') {
219 while ((c = getc(cfile)) != EOF && c != '\n');
220 }
221 if (c == EOF) {
222 fputs(
223 "Macro definition missing null line terminator.\n",
224 ttyout);
225 goto bad;
226 }
227 if (macnum == 0) {
228 macros[macnum].mac_start = macbuf;
229 }
230 else {
231 macros[macnum].mac_start =
232 macros[macnum-1].mac_end + 1;
233 }
234 tmp = macros[macnum].mac_start;
235 while (tmp != macbuf + 4096) {
236 if ((c = getc(cfile)) == EOF) {
237 fputs(
238 "Macro definition missing null line terminator.\n",
239 ttyout);
240 goto bad;
241 }
242 *tmp = c;
243 if (*tmp == '\n') {
244 if (tmp == macros[macnum].mac_start) {
245 macros[macnum++].mac_end = tmp;
246 break;
247 } else if (*(tmp - 1) == '\0') {
248 macros[macnum++].mac_end =
249 tmp - 1;
250 break;
251 }
252 *tmp = '\0';
253 }
254 tmp++;
255 }
256 if (tmp == macbuf + 4096) {
257 fputs("4K macro buffer exceeded.\n",
258 ttyout);
259 goto bad;
260 }
261 break;
262 default:
263 warnx("Unknown .netrc keyword `%s'", tokval);
264 break;
265 }
266 goto done;
267 }
268 done:
269 if (t == -1)
270 goto bad;
271 (void)fclose(cfile);
272 return (0);
273 bad:
274 (void)fclose(cfile);
275 return (-1);
276 }
277
278 static int
token(void)279 token(void)
280 {
281 char *cp;
282 int c;
283 struct toktab *t;
284
285 if (feof(cfile) || ferror(cfile))
286 return (0);
287 while ((c = getc(cfile)) != EOF &&
288 (c == '\n' || c == '\t' || c == ' ' || c == ','))
289 continue;
290 if (c == EOF)
291 return (0);
292 cp = tokval;
293 if (c == '"') {
294 while ((c = getc(cfile)) != EOF && c != '"') {
295 if (c == '\\')
296 if ((c = getc(cfile)) == EOF)
297 break;
298 *cp++ = c;
299 if (cp == tokval + sizeof(tokval)) {
300 warnx("Token in .netrc too long");
301 return (-1);
302 }
303 }
304 } else {
305 *cp++ = c;
306 while ((c = getc(cfile)) != EOF
307 && c != '\n' && c != '\t' && c != ' ' && c != ',') {
308 if (c == '\\')
309 if ((c = getc(cfile)) == EOF)
310 break;
311 *cp++ = c;
312 if (cp == tokval + sizeof(tokval)) {
313 warnx("Token in .netrc too long");
314 return (-1);
315 }
316 }
317 }
318 *cp = 0;
319 if (tokval[0] == 0)
320 return (0);
321 for (t = toktab; t->tokstr; t++)
322 if (!strcmp(t->tokstr, tokval))
323 return (t->tval);
324 return (ID);
325 }
326