Difference between revisions of "CoE Cluster november 2011/MD5 attack singlethreaded"
From Teknologisk videncenter
m (→bfcp.c source) |
m (→Preparing your script) |
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#Compile bfcp '''gcc ~/src/bfcp.c -o ~/bin/bfcp''' | #Compile bfcp '''gcc ~/src/bfcp.c -o ~/bin/bfcp''' | ||
#Make your scriptfile with wour preferred editor. fx. '''vi ~/bin/md5hack''' | #Make your scriptfile with wour preferred editor. fx. '''vi ~/bin/md5hack''' | ||
| + | =Links= | ||
| + | *[http://haxcess.com/2008/10/21/cisco-password-recovery/ Cisco MD5] | ||
[[Category:CoE]] | [[Category:CoE]] | ||
Latest revision as of 13:41, 7 November 2011
Contents
Opgave
Vi ved en person anvender fire små bogstaver som password, og vi har fået fat i personens md5sum hash som er 420fc26fa13e665e32ca17ea781c645a
Hvad er personens password????
Password generator
Start programmet med bfpc aaaa og programmet vil skrive aaab start med aaab til aaac ....... zzzz
Eksempel på anvendelse
A="aaaa"
while A=`./bfcp $A`
do
echo -e "$A"
donebfcp.c source
#include <string.h>
#include <stdio.h>
//bfcp - Brute Force Password Cracker
int main(int argc, char *argv[]) {
int i,len;
if (argc != 2) {
fprintf(stderr,"Argument expected\n");
return(1);
}
len = (int) strlen(argv[1]);
for (i=len-1; i >= 0 ; i--) {
if (argv[1][i] != 'z') {
argv[1][i]++;
printf("%s\n",argv[1]);
return(0);
} else {
argv[1][i]='a';
}
}
//All passwords tryed
return(1);
}
Preparing your script
- Make your own bin library: mkdir ~/bin
- Make your own src library: mkdir ~/src
- Copy and paste the bfcp c source code to ~/src/bfcp.c file
- Compile bfcp gcc ~/src/bfcp.c -o ~/bin/bfcp
- Make your scriptfile with wour preferred editor. fx. vi ~/bin/md5hack