minix/commands/ftpd200/access.c
2005-06-17 13:00:04 +00:00

134 lines
2.5 KiB
C

/* access.c Copyright 1992-2000 by Michael Temari All Rights Reserved
*
* This file is part of ftpd.
*
* This file handles:
*
* USER PASS QUIT
*
*
* 01/25/96 Initial Release Michael Temari, <Michael@TemWare.Com>
*/
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <pwd.h>
#include <stdlib.h>
#include <unistd.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include "ftpd.h"
#include "access.h"
_PROTOTYPE(static int AreWeIn, (char *name, struct passwd *pwd));
static char *msg530 = "530 Not logged in.\r\n";
/* Returns -1 = not logged in, 0 = loggedin */
int ChkLoggedIn()
{
if(!loggedin) {
printf(msg530);
return(-1);
} else
return(0);
}
/* what a USER! */
int doUSER(buff)
char *buff;
{
loggedin = 0;
gotuser = 0;
strncpy(username, buff, sizeof(username));
username[sizeof(username)-1] = '\0';
if(*username == '\0') {
printf("501 Bad user name.\r\n");
return(GOOD);
}
gotuser = 1;
printf("331 Password required for %s.\r\n", username);
return(GOOD);
}
/* secret, secret, secret */
int doPASS(buff)
char *buff;
{
char *name;
struct passwd *pwd;
int bad=0;
name = username;
if(!strcmp(name, "anonymous"))
name = "ftp";
if(!gotuser || ((pwd = getpwnam(name)) == (struct passwd *)0))
bad = 1;
else
if(strcmp(name, "ftp")) {
if(!strcmp(pwd->pw_passwd, crypt("", pwd->pw_passwd)))
bad = 1;
if(strcmp(pwd->pw_passwd, crypt(buff, pwd->pw_passwd)))
bad = 1;
} else {
strncpy(anonpass, buff, sizeof(anonpass));
anonpass[sizeof(anonpass)-1] = '\0';
}
if(bad) {
logit("LOGIN", "FAIL");
printf(msg530);
return(GOOD);
}
return(AreWeIn(name, pwd));
}
/* bye, bye don't let the door hit you in the butt on the way out */
int doQUIT(buff)
char *buff;
{
printf("221 Service closing, don't be a stranger.\r\n");
return(BAD);
}
/* see if this user is okay */
static int AreWeIn(name, pwd)
char *name;
struct passwd *pwd;
{
if(!strcmp(name, "ftp")) {
if(chroot(pwd->pw_dir)) {
logit("LOGIN", "FAIL");
printf("530 Not logged in, could not chroot.\r\n");
return(GOOD);
}
strncpy(newroot, pwd->pw_dir, sizeof(newroot));
newroot[sizeof(newroot)-1] = '\0';
anonymous = 1;
strcpy(pwd->pw_dir, "/");
}
if(setgid(pwd->pw_gid) || setuid(pwd->pw_uid) || chdir(pwd->pw_dir)) {
logit("LOGIN", "FAIL");
printf(msg530);
anonymous = 0;
} else {
logit("LOGIN", "PASS");
showmsg("230", (char *)NULL);
printf("230 User %s logged in, directory %s.\r\n",
username, pwd->pw_dir);
loggedin = 1;
}
return(GOOD);
}