Lab46 Wiki

-Brute

#!/bin/bash
#
# brute
#
# $1 is intended to be a hash string provided externally
#
# output is plaintext:encryptedtext
#
 
if [ $# -lt 1 ]; then
	echo "USAGE: $0 HASHSTRING"
	exit 1
fi
 
for x in {0..9} {A..Z} {a..z}; do
	for y in {0..9} {A..Z} {a..z}; do
		for z in {0..9} {A..Z} {a..z}; do
		#	echo -n ${x}${y}:
		#	./genhash ${x}${y}${z}
			./genhashfaster ${x}${y}${z} | ./match "${1}" "${x}${y}${z}"
		done
	done
done
 
exit 0

-genhash

/*
 * genhash.c - C program to generate encrypted hashes of strings
 *
 * TO COMPILE: gcc -o genhash genhash.c -lcrypt
 */
#define _XOPEN_SOURCE 700
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
 
int main(int argc, char **argv)
{
	char *hashstring, salt[3];
 
	if (argc < 1)
	{
		printf("usage: %s plaintextstring\n", argv[0]);
		exit(1);
	}
 
	salt[0] = 'A';
	salt[1] = 'B';
	salt[2] = '\0';
 
	/* do the crypt */
	hashstring = crypt(argv[1], salt);
 
	printf("%s\n", hashstring);
	return(0);
}

-hashfile

bob:ABzjLK.dcaCYM jim:ABE/KhqRiDV0Y sue:AB/bF7lOzp.xk jon:AB.nqvyUgOrkw ned:ABZOmUPwFxwLI tom:ABBxq0DIdK7pw ann:ABXL.GHaVNqqw lin:ABTyuJeFosESc

-match

#!/bin/bash
#
# match - compare two strings for equality
#
# This script uses command-line arguments:
#    $1 is the string to compare against
#    $2 is another string, not compared (but will be printed on match)
#
 
read str
 
if [ $# -lt 1 ]; then
	echo "Usage: $0 COMPARESTRING LABELSTRING"
	exit 1
fi
 
if [ "${1}" = "${str}" ]; then
	echo "${2}:${1}"
fi
 
exit 0

-process

#!/bin/bash
#
# process - slice up colon-delimited text file into component parts
#
 
echo "=============================="
for line in `cat hashfile`; do
	echo "I just read: $line"
 
	field1="`echo $line | cut -d':' -f1`"
	field2="`echo $line | cut -d':' -f2`"
	./brute $field2
 
	echo "     Field 1 is: $field1"
	echo "     Field 2 is: $field2"
 
	echo "=============================="
done
 
exit 0