4.4BSD/usr/src/usr.bin/ftp/ruserpass.c
/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#ifndef lint
static char sccsid[] = "@(#)ruserpass.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/types.h>
#include <stdio.h>
#include <utmp.h>
#include <ctype.h>
#include <sys/stat.h>
#include <errno.h>
#include "ftp_var.h"
char *renvlook(), *malloc(), *index(), *getenv(), *getpass(), *getlogin();
char *strcpy();
struct utmp *getutmp();
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[]= {
"default", DEFAULT,
"login", LOGIN,
"password", PASSWD,
"passwd", PASSWD,
"account", ACCOUNT,
"machine", MACH,
"macdef", MACDEF,
0, 0
};
ruserpass(host, aname, apass, aacct)
char *host, **aname, **apass, **aacct;
{
char *hdir, buf[BUFSIZ], *tmp;
char myname[MAXHOSTNAMELEN], *mydomain;
int t, i, c, usedefault = 0;
struct stat stb;
static int token();
hdir = getenv("HOME");
if (hdir == NULL)
hdir = ".";
(void) sprintf(buf, "%s/.netrc", hdir);
cfile = fopen(buf, "r");
if (cfile == NULL) {
if (errno != ENOENT)
perror(buf);
return(0);
}
if (gethostname(myname, sizeof(myname)) < 0)
myname[0] = '\0';
if ((mydomain = index(myname, '.')) == NULL)
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
* incompletely-specified host in local domain.
*/
if (strcasecmp(host, tokval) == 0)
goto match;
if (strcasecmp(hostname, tokval) == 0)
goto match;
if ((tmp = index(hostname, '.')) != NULL &&
strcasecmp(tmp, mydomain) == 0 &&
strncasecmp(hostname, tokval, tmp-hostname) == 0 &&
tokval[tmp - hostname] == '\0')
goto match;
if ((tmp = index(host, '.')) != NULL &&
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);
} else {
if (strcmp(*aname, tokval))
goto next;
}
break;
case PASSWD:
if (strcmp(*aname, "anonymous") &&
fstat(fileno(cfile), &stb) >= 0 &&
(stb.st_mode & 077) != 0) {
fprintf(stderr, "Error: .netrc file is readable by others.\n");
fprintf(stderr,
"Remove password or make file unreadable by others.\n\n");
goto bad;
}
if (token() && *apass == 0) {
*apass = malloc((unsigned) strlen(tokval) + 1);
(void) strcpy(*apass, tokval);
}
break;
case ACCOUNT:
if (fstat(fileno(cfile), &stb) >= 0
&& (stb.st_mode & 077) != 0) {
fprintf(stderr, "Error: .netrc file is readable by others.\n");
fprintf(stderr,
"Remove account or make file unreadable by others.\n\n");
goto bad;
}
if (token() && *aacct == 0) {
*aacct = malloc((unsigned) strlen(tokval) + 1);
(void) strcpy(*aacct, tokval);
}
break;
case MACDEF:
if (proxy) {
(void) fclose(cfile);
return(0);
}
while ((c=getc(cfile)) != EOF && c == ' ' || c == '\t');
if (c == EOF || c == '\n') {
printf("Missing macdef name argument.\n");
goto bad;
}
if (macnum == 16) {
printf("Limit of 16 macros have already been defined\n");
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) {
printf("Macro definition missing null line terminator.\n");
goto bad;
}
*tmp = '\0';
if (c != '\n') {
while ((c=getc(cfile)) != EOF && c != '\n');
}
if (c == EOF) {
printf("Macro definition missing null line terminator.\n");
goto bad;
}
if (macnum == 0) {
macros[macnum].mac_start = macbuf;
}
else {
macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
}
tmp = macros[macnum].mac_start;
while (tmp != macbuf + 4096) {
if ((c=getc(cfile)) == EOF) {
printf("Macro definition missing null line terminator.\n");
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) {
printf("4K macro buffer exceeded\n");
goto bad;
}
break;
default:
fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
break;
}
goto done;
}
done:
(void) fclose(cfile);
return(0);
bad:
(void) fclose(cfile);
return(-1);
}
static
token()
{
char *cp;
int c;
struct toktab *t;
if (feof(cfile) || ferror(cfile))
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);
}