Files used to attack assignment 3

GenCaesar.scala

import java.lang.RuntimeException
import java.io._
import scala.io.Source

class GenCaesar(cipher: Array[Byte]) {
	
	def brute(b: Array[Byte]): IndexedSeq[(Int, Array[Byte])] = 
		(0 to 255).map {
			i => (i, (b.map(decrypt(_, i))))
		}

	//data decrypt
	def decrypt = brute(cipher)
	
	//atomary decrypt
	def decrypt(b: Byte, k: Int): Byte = ((b-k.toByte)).toByte 

	override def toString = decrypt mkString "\n"
	

	def writeToFiles(dir: String): Unit = {
		//writeToFile("./decrypted/0.jpg", cipher)
		val decrypted = decrypt
		decrypted.foreach {
			(tup) => 
				val path = "./"+dir+"/"+tup._1+".dat"
				writeToFile(path, tup._2)
		}
	}
	def writeToFile(path: String, data: Array[Byte]): Unit = {
		val file = new File(path) 
		file.createNewFile()
		val fos =  new BufferedOutputStream(new FileOutputStream(file))
		fos.write(data)
		fos.close()
	}
}
object GenCaesar {
	def main(args: Array[String]): Unit = {
	  	for (arg <- args) {
	  		val file = new File(arg)
	  		val fin =  new FileInputStream(file)
	  		val bytes = new Array[Byte](file.length.toInt)
	  		fin.read(bytes)

	  		val c = new GenCaesar(bytes)
		  	c.writeToFiles("decrypted")
	  	}
	  	
	}
	
}

goforit.sh

wget http://users.abo.fi/ipetre/crypto/encrypt3.dat
scala GenCaesar encrypt3.dat
file decrypted/* >fileoutput.txt
scala parseFile fileoutput.txt

parseFile.scala

import scala.io.Source

class parseFile(fo: String) {
	val splitted = fo split "\n"

	def removeDatas = splitted.filterNot(_.endsWith("data"))

	override def toString = removeDatas mkString "\n"
}
object parseFile {
	def main(args: Array[String]): Unit = {
	  for (arg <- args) {
	  		val sauce = Source.fromFile(arg)
		  	val lines = sauce mkString ""
		  	sauce.close()

		  	val q = new parseFile(lines)
		  	
		  	println(q)

	  	}
	}
	
}