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1.24 ! pyr 1: /* $OpenBSD: ruserpass.c,v 1.23 2007/03/24 14:29:02 moritz Exp $ */
1.9 millert 2: /* $NetBSD: ruserpass.c,v 1.14 1997/07/20 09:46:01 lukem Exp $ */
1.1 deraadt 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.
1.16 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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:
1.24 ! pyr 33: #ifndef SMALL
1.1 deraadt 34: #ifndef lint
1.4 millert 35: #if 0
1.1 deraadt 36: static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95";
1.4 millert 37: #else
1.24 ! pyr 38: static const char rcsid[] = "$OpenBSD: ruserpass.c,v 1.23 2007/03/24 14:29:02 moritz Exp $";
1.4 millert 39: #endif
1.1 deraadt 40: #endif /* not lint */
41:
42: #include <sys/types.h>
43: #include <sys/stat.h>
44:
45: #include <ctype.h>
46: #include <err.h>
47: #include <errno.h>
48: #include <stdio.h>
49: #include <stdlib.h>
50: #include <string.h>
51: #include <unistd.h>
52:
53: #include "ftp_var.h"
54:
1.13 millert 55: static int token(void);
1.1 deraadt 56: static FILE *cfile;
57:
58: #define DEFAULT 1
59: #define LOGIN 2
60: #define PASSWD 3
61: #define ACCOUNT 4
62: #define MACDEF 5
63: #define ID 10
64: #define MACH 11
65:
66: static char tokval[100];
67:
68: static struct toktab {
69: char *tokstr;
70: int tval;
71: } toktab[]= {
72: { "default", DEFAULT },
73: { "login", LOGIN },
74: { "password", PASSWD },
75: { "passwd", PASSWD },
76: { "account", ACCOUNT },
77: { "machine", MACH },
78: { "macdef", MACDEF },
79: { NULL, 0 }
80: };
81:
82: int
1.18 deraadt 83: ruserpass(const char *host, char **aname, char **apass, char **aacct)
1.1 deraadt 84: {
1.23 moritz 85: char *hdir, buf[MAXPATHLEN], *tmp;
1.1 deraadt 86: char myname[MAXHOSTNAMELEN], *mydomain;
87: int t, i, c, usedefault = 0;
88: struct stat stb;
89:
90: hdir = getenv("HOME");
1.14 millert 91: if (hdir == NULL || *hdir == '\0')
1.12 millert 92: return (0);
1.22 moritz 93: i = snprintf(buf, sizeof(buf), "%s/.netrc", hdir);
94: if (i < 0 || i >= sizeof(buf)) {
1.3 millert 95: warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG));
96: return (0);
97: }
1.1 deraadt 98: cfile = fopen(buf, "r");
99: if (cfile == NULL) {
100: if (errno != ENOENT)
101: warn("%s", buf);
102: return (0);
103: }
104: if (gethostname(myname, sizeof(myname)) < 0)
105: myname[0] = '\0';
106: if ((mydomain = strchr(myname, '.')) == NULL)
107: mydomain = "";
108: next:
1.21 moritz 109: while ((t = token()) > 0) switch(t) {
1.1 deraadt 110:
111: case DEFAULT:
112: usedefault = 1;
1.20 ray 113: /* FALLTHROUGH */
1.1 deraadt 114:
115: case MACH:
116: if (!usedefault) {
1.21 moritz 117: if ((t = token()) == -1)
118: goto bad;
119: if (t != ID)
1.1 deraadt 120: continue;
121: /*
122: * Allow match either for user's input host name
1.4 millert 123: * or official hostname. Also allow match of
1.1 deraadt 124: * incompletely-specified host in local domain.
125: */
126: if (strcasecmp(host, tokval) == 0)
127: goto match;
128: if (strcasecmp(hostname, tokval) == 0)
129: goto match;
130: if ((tmp = strchr(hostname, '.')) != NULL &&
131: strcasecmp(tmp, mydomain) == 0 &&
1.9 millert 132: strncasecmp(hostname, tokval,
133: (size_t)(tmp - hostname)) == 0 &&
1.1 deraadt 134: tokval[tmp - hostname] == '\0')
135: goto match;
136: if ((tmp = strchr(host, '.')) != NULL &&
137: strcasecmp(tmp, mydomain) == 0 &&
1.9 millert 138: strncasecmp(host, tokval,
139: (size_t)(tmp - host)) == 0 &&
1.1 deraadt 140: tokval[tmp - host] == '\0')
141: goto match;
142: continue;
143: }
144: match:
1.21 moritz 145: while ((t = token()) > 0 &&
146: t != MACH && t != DEFAULT) switch(t) {
1.1 deraadt 147:
148: case LOGIN:
1.21 moritz 149: if ((t = token()) == -1)
150: goto bad;
151: if (t) {
1.15 deraadt 152: if (*aname == 0)
153: *aname = strdup(tokval);
154: else {
1.1 deraadt 155: if (strcmp(*aname, tokval))
156: goto next;
157: }
1.11 deraadt 158: }
1.1 deraadt 159: break;
160: case PASSWD:
161: if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
162: fstat(fileno(cfile), &stb) >= 0 &&
163: (stb.st_mode & 077) != 0) {
164: warnx("Error: .netrc file is readable by others.");
165: warnx("Remove password or make file unreadable by others.");
166: goto bad;
167: }
1.21 moritz 168: if ((t = token()) == -1)
169: goto bad;
170: if (t && *apass == 0)
1.15 deraadt 171: *apass = strdup(tokval);
1.1 deraadt 172: break;
173: case ACCOUNT:
174: if (fstat(fileno(cfile), &stb) >= 0
175: && (stb.st_mode & 077) != 0) {
176: warnx("Error: .netrc file is readable by others.");
177: warnx("Remove account or make file unreadable by others.");
178: goto bad;
179: }
1.21 moritz 180: if ((t = token()) == -1)
181: goto bad;
182: if (t && *aacct == 0)
1.15 deraadt 183: *aacct = strdup(tokval);
1.1 deraadt 184: break;
185: case MACDEF:
186: if (proxy) {
1.5 millert 187: (void)fclose(cfile);
1.1 deraadt 188: return (0);
189: }
1.10 millert 190: while ((c = fgetc(cfile)) != EOF)
1.4 millert 191: if (c != ' ' && c != '\t')
192: break;
1.1 deraadt 193: if (c == EOF || c == '\n') {
1.8 deraadt 194: fputs("Missing macdef name argument.\n", ttyout);
1.1 deraadt 195: goto bad;
196: }
197: if (macnum == 16) {
1.8 deraadt 198: fputs(
199: "Limit of 16 macros have already been defined.\n", ttyout);
1.1 deraadt 200: goto bad;
201: }
202: tmp = macros[macnum].mac_name;
203: *tmp++ = c;
1.10 millert 204: for (i=0; i < 8 && (c = fgetc(cfile)) != EOF &&
1.1 deraadt 205: !isspace(c); ++i) {
206: *tmp++ = c;
207: }
208: if (c == EOF) {
1.8 deraadt 209: fputs(
210: "Macro definition missing null line terminator.\n", ttyout);
1.1 deraadt 211: goto bad;
212: }
213: *tmp = '\0';
214: if (c != '\n') {
1.10 millert 215: while ((c = fgetc(cfile)) != EOF && c != '\n');
1.1 deraadt 216: }
217: if (c == EOF) {
1.8 deraadt 218: fputs(
219: "Macro definition missing null line terminator.\n", ttyout);
1.1 deraadt 220: goto bad;
221: }
222: if (macnum == 0) {
223: macros[macnum].mac_start = macbuf;
224: }
225: else {
1.4 millert 226: macros[macnum].mac_start =
227: macros[macnum-1].mac_end + 1;
1.1 deraadt 228: }
229: tmp = macros[macnum].mac_start;
230: while (tmp != macbuf + 4096) {
1.10 millert 231: if ((c = fgetc(cfile)) == EOF) {
1.8 deraadt 232: fputs(
233: "Macro definition missing null line terminator.\n", ttyout);
1.1 deraadt 234: goto bad;
235: }
236: *tmp = c;
237: if (*tmp == '\n') {
1.23 moritz 238: if (tmp == macros[macnum].mac_start) {
239: macros[macnum++].mac_end = tmp;
240: break;
241: } else if (*(tmp-1) == '\0') {
242: macros[macnum++].mac_end =
243: tmp - 1;
244: break;
1.1 deraadt 245: }
246: *tmp = '\0';
247: }
248: tmp++;
249: }
250: if (tmp == macbuf + 4096) {
1.8 deraadt 251: fputs("4K macro buffer exceeded.\n", ttyout);
1.1 deraadt 252: goto bad;
253: }
254: break;
255: default:
256: warnx("Unknown .netrc keyword %s", tokval);
257: break;
258: }
259: goto done;
260: }
261: done:
1.21 moritz 262: if (t == -1)
263: goto bad;
1.5 millert 264: (void)fclose(cfile);
1.1 deraadt 265: return (0);
266: bad:
1.5 millert 267: (void)fclose(cfile);
1.1 deraadt 268: return (-1);
269: }
270:
271: static int
1.18 deraadt 272: token(void)
1.1 deraadt 273: {
274: char *cp;
275: int c;
276: struct toktab *t;
277:
278: if (feof(cfile) || ferror(cfile))
279: return (0);
1.10 millert 280: while ((c = fgetc(cfile)) != EOF &&
1.1 deraadt 281: (c == '\n' || c == '\t' || c == ' ' || c == ','))
282: continue;
283: if (c == EOF)
284: return (0);
285: cp = tokval;
286: if (c == '"') {
1.10 millert 287: while ((c = fgetc(cfile)) != EOF && c != '"') {
1.1 deraadt 288: if (c == '\\')
1.10 millert 289: c = fgetc(cfile);
1.1 deraadt 290: *cp++ = c;
1.21 moritz 291: if (cp == tokval + sizeof(tokval)) {
292: warnx("Token in .netrc too long");
293: return (-1);
294: }
1.1 deraadt 295: }
296: } else {
297: *cp++ = c;
1.10 millert 298: while ((c = fgetc(cfile)) != EOF
1.1 deraadt 299: && c != '\n' && c != '\t' && c != ' ' && c != ',') {
300: if (c == '\\')
1.10 millert 301: c = fgetc(cfile);
1.1 deraadt 302: *cp++ = c;
1.21 moritz 303: if (cp == tokval + sizeof(tokval)) {
304: warnx("Token in .netrc too long");
305: return (-1);
306: }
1.1 deraadt 307: }
308: }
309: *cp = 0;
310: if (tokval[0] == 0)
311: return (0);
312: for (t = toktab; t->tokstr; t++)
313: if (!strcmp(t->tokstr, tokval))
314: return (t->tval);
315: return (ID);
316: }
1.24 ! pyr 317: #endif