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