NetBSD/usr.bin/ftp/ruserpass.c

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/* $NetBSD: ruserpass.c,v 1.14 1997/07/20 09:46:01 lukem Exp $ */
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/*
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* Copyright (c) 1985, 1993, 1994
* The Regents of the University of California. All rights reserved.
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
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#ifndef lint
#if 0
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static char sccsid[] = "@(#)ruserpass.c 8.4 (Berkeley) 4/27/95";
#else
__RCSID("$NetBSD: ruserpass.c,v 1.14 1997/07/20 09:46:01 lukem Exp $");
#endif
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#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
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#include <ctype.h>
#include <err.h>
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#include <errno.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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#include "ftp_var.h"
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static int token __P((void));
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static FILE *cfile;
#define DEFAULT 1
#define LOGIN 2
#define PASSWD 3
#define ACCOUNT 4
#define MACDEF 5
#define ID 10
#define MACH 11
static char tokval[100];
static struct toktab {
char *tokstr;
int tval;
} toktab[]= {
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{ "default", DEFAULT },
{ "login", LOGIN },
{ "password", PASSWD },
{ "passwd", PASSWD },
{ "account", ACCOUNT },
{ "machine", MACH },
{ "macdef", MACDEF },
{ NULL, 0 }
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};
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int
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ruserpass(host, aname, apass, aacct)
const char *host;
char **aname, **apass, **aacct;
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{
char *hdir, buf[BUFSIZ], *tmp;
char myname[MAXHOSTNAMELEN], *mydomain;
int t, i, c, usedefault = 0;
struct stat stb;
hdir = getenv("HOME");
if (hdir == NULL)
hdir = ".";
if (strlen(hdir) + sizeof(".netrc") < sizeof(buf)) {
(void)snprintf(buf, sizeof buf, "%s/.netrc", hdir);
} else {
warnx("%s/.netrc: %s", hdir, strerror(ENAMETOOLONG));
return (0);
}
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cfile = fopen(buf, "r");
if (cfile == NULL) {
if (errno != ENOENT)
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warn("%s", buf);
return (0);
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}
if (gethostname(myname, sizeof(myname)) < 0)
myname[0] = '\0';
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if ((mydomain = strchr(myname, '.')) == NULL)
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mydomain = "";
next:
while ((t = token())) switch(t) {
case DEFAULT:
usedefault = 1;
/* FALL THROUGH */
case MACH:
if (!usedefault) {
if (token() != ID)
continue;
/*
* Allow match either for user's input host name
* or official hostname. Also allow match of
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* incompletely-specified host in local domain.
*/
if (strcasecmp(host, tokval) == 0)
goto match;
if (strcasecmp(hostname, tokval) == 0)
goto match;
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if ((tmp = strchr(hostname, '.')) != NULL &&
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strcasecmp(tmp, mydomain) == 0 &&
strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
tokval[tmp - hostname] == '\0')
goto match;
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if ((tmp = strchr(host, '.')) != NULL &&
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strcasecmp(tmp, mydomain) == 0 &&
strncasecmp(host, tokval, tmp - host) == 0 &&
tokval[tmp - host] == '\0')
goto match;
continue;
}
match:
while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
case LOGIN:
if (token())
if (*aname == 0) {
*aname = malloc((unsigned)
strlen(tokval) + 1);
(void)strcpy(*aname, tokval);
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} else {
if (strcmp(*aname, tokval))
goto next;
}
break;
case PASSWD:
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if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
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fstat(fileno(cfile), &stb) >= 0 &&
(stb.st_mode & 077) != 0) {
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warnx("Error: .netrc file is readable by others.");
warnx("Remove password or make file unreadable by others.");
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goto bad;
}
if (token() && *apass == 0) {
*apass = malloc((unsigned) strlen(tokval) + 1);
(void)strcpy(*apass, tokval);
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}
break;
case ACCOUNT:
if (fstat(fileno(cfile), &stb) >= 0
&& (stb.st_mode & 077) != 0) {
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warnx("Error: .netrc file is readable by others.");
warnx("Remove account or make file unreadable by others.");
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goto bad;
}
if (token() && *aacct == 0) {
*aacct = malloc((unsigned) strlen(tokval) + 1);
(void)strcpy(*aacct, tokval);
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}
break;
case MACDEF:
if (proxy) {
(void)fclose(cfile);
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return (0);
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}
while ((c=getc(cfile)) != EOF)
if (c != ' ' && c != '\t')
break;
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if (c == EOF || c == '\n') {
puts("Missing macdef name argument.");
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goto bad;
}
if (macnum == 16) {
puts(
"Limit of 16 macros have already been defined.");
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goto bad;
}
tmp = macros[macnum].mac_name;
*tmp++ = c;
for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
!isspace(c); ++i) {
*tmp++ = c;
}
if (c == EOF) {
puts(
"Macro definition missing null line terminator.");
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goto bad;
}
*tmp = '\0';
if (c != '\n') {
while ((c=getc(cfile)) != EOF && c != '\n');
}
if (c == EOF) {
puts(
"Macro definition missing null line terminator.");
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goto bad;
}
if (macnum == 0) {
macros[macnum].mac_start = macbuf;
}
else {
macros[macnum].mac_start =
macros[macnum-1].mac_end + 1;
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}
tmp = macros[macnum].mac_start;
while (tmp != macbuf + 4096) {
if ((c=getc(cfile)) == EOF) {
puts(
"Macro definition missing null line terminator.");
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goto bad;
}
*tmp = c;
if (*tmp == '\n') {
if (*(tmp-1) == '\0') {
macros[macnum++].mac_end = tmp - 1;
break;
}
*tmp = '\0';
}
tmp++;
}
if (tmp == macbuf + 4096) {
puts("4K macro buffer exceeded.");
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goto bad;
}
break;
default:
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warnx("Unknown .netrc keyword %s", tokval);
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break;
}
goto done;
}
done:
(void)fclose(cfile);
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return (0);
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bad:
(void)fclose(cfile);
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return (-1);
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}
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static int
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token()
{
char *cp;
int c;
struct toktab *t;
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if (feof(cfile) || ferror(cfile))
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return (0);
while ((c = getc(cfile)) != EOF &&
(c == '\n' || c == '\t' || c == ' ' || c == ','))
continue;
if (c == EOF)
return (0);
cp = tokval;
if (c == '"') {
while ((c = getc(cfile)) != EOF && c != '"') {
if (c == '\\')
c = getc(cfile);
*cp++ = c;
}
} else {
*cp++ = c;
while ((c = getc(cfile)) != EOF
&& c != '\n' && c != '\t' && c != ' ' && c != ',') {
if (c == '\\')
c = getc(cfile);
*cp++ = c;
}
}
*cp = 0;
if (tokval[0] == 0)
return (0);
for (t = toktab; t->tokstr; t++)
if (!strcmp(t->tokstr, tokval))
return (t->tval);
return (ID);
}