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Rixing Wu
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‎Lab01/.DS_Store‎

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‎Lab01/part1/.DS_Store‎

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‎Lab01/part1/DesEncrypter.java‎

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import java.io.*;
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import java.security.spec.AlgorithmParameterSpec;
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import java.security.spec.KeySpec;
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import javax.crypto.spec.*;
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//import java.security.Provider;
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import java.security.Provider;
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import java.security.Security;
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import java.util.Arrays;
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import java.util.Set;
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import java.util.HashSet;
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import java.util.Iterator;
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import javax.crypto.*;
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public class DesEncrypter {
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private Cipher ecipher;
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private Cipher dcipher;
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// Create an 8-byte initialization vector
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byte[] iv = new byte[]{
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(byte)0x8E, (byte)0x12, (byte)0x39, (byte)0x9C,
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(byte)0x07, (byte)0x72, (byte)0x6F, (byte)0x5A
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};
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DesEncrypter(String passPhrase, String ALG) {
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// Prepare the parameter to the ciphers
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int iterationCount = 19; // Iteration count
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AlgorithmParameterSpec paramSpec = new PBEParameterSpec(iv, iterationCount);
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try {
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// Create the key
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KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), iv, iterationCount);
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SecretKey key = SecretKeyFactory.getInstance(ALG).generateSecret(keySpec);
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ecipher = Cipher.getInstance(key.getAlgorithm());
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dcipher = Cipher.getInstance(key.getAlgorithm());
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// Create the ciphers
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ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
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dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
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}
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catch (java.security.InvalidAlgorithmParameterException e) { System.err.println(e); }
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catch (java.security.spec.InvalidKeySpecException e) { System.err.println(e); }
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catch (javax.crypto.NoSuchPaddingException e) { System.err.println(e); }
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catch (java.security.NoSuchAlgorithmException e) { System.err.println(e); }
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catch (java.security.InvalidKeyException e) { System.err.println(e); }
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}
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/*
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* Create a key like: SecretKey key = KeyGenerator.getInstance("DES").generateKey();
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* and pass the key to this constructor.
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*/
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/*
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DesEncrypter(SecretKey key) {
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AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);
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try {
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ecipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
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dcipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
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// CBC requires an initialization vector
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ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
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dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
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}
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catch (java.security.InvalidAlgorithmParameterException e) { System.err.println(e); }
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catch (javax.crypto.NoSuchPaddingException e) { System.err.println(e); }
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catch (java.security.NoSuchAlgorithmException e) { System.err.println(e); }
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catch (java.security.InvalidKeyException e) { System.err.println(e); }
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}
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*/
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public void encrypt(InputStream in, OutputStream out) {
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byte[] buf = new byte[1024];
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try {
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// Bytes written to out will be encrypted
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out = new CipherOutputStream(out, ecipher);
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// Read in the cleartext bytes and write to out to encrypt
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int numRead = 0;
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while ((numRead = in.read(buf)) >= 0) {
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out.write(buf, 0, numRead);
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}
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out.close();
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}
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catch (java.io.IOException e) { System.err.println("encrypt: " + e);}
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}
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public void decrypt(InputStream in, OutputStream out) {
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byte[] buf = new byte[1024];
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try {
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// Bytes read from in will be decrypted
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in = new CipherInputStream(in, dcipher);
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// Read in the decrypted bytes and write the cleartext to out
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int numRead = 0;
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while ((numRead = in.read(buf)) >= 0) {
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out.write(buf, 0, numRead);
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}
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out.close();
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}
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catch (java.io.IOException e) { System.err.println("decrypt: " + e);}
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}
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//
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// This method is implemented in Listing All Available Cryptographic Services
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//
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private static void printCryptoImpls(String serviceType) {
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String[] names;
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Set<String> result = new HashSet<String>();
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// All providers
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Provider[] providers = Security.getProviders();
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for (int i=0; i<providers.length; i++) {
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// Get services provided by each provider
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Set keys = providers[i].keySet();
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/*for (Iterator it=keys.iterator(); it.hasNext(); ) {
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String key = (String)it.next();
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System.out.println(key);
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}*/
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for (Iterator it=keys.iterator(); it.hasNext(); ) {
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String key = (String)it.next();
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key = key.split(" ")[0];
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if (key.startsWith(serviceType + ".")) {
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result.add(key.substring(serviceType.length() + 1));
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}
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else if (key.startsWith("Alg.Alias." + serviceType + ".")) {
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// This is an alias
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result.add(key.substring(serviceType.length() + 11));
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}
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}
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}
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names = (String[])result.toArray(new String[result.size()]);
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for(int i=0; i < names.length; i++)
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System.out.println("\t"+names[i]);
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}
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public static void main(String [] args) {
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try {
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/*
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System.out.println("Crypto Implementations:");
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printCryptoImpls("Cipher");
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System.out.println("Key Generators:");
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printCryptoImpls("KeyGenerator");
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*/
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/*
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* Pass it either "PBEWithMD5AndDES" or "PBEWithMD5AndTripleDES" for DES or 3DES respectively
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*/
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DesEncrypter DES = new DesEncrypter("smilepass", "PBEWithMD5AndDES" );
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DES.encrypt(new FileInputStream("smile.png"), new FileOutputStream("smile_encripted"));
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DES.decrypt(new FileInputStream("smile_encripted"), new FileOutputStream("smileDecripted.png"));
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DesEncrypter TDES = new DesEncrypter("smilepass", "PBEWithMD5AndTripleDES" );
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TDES.encrypt(new FileInputStream("smile.png"), new FileOutputStream("smile_3DESencripted"));
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TDES.decrypt(new FileInputStream("smile_3DESencripted"), new FileOutputStream("smile3DESDecripted"));
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}
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catch (Exception e) { System.err.println(e); }
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}
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}

‎Lab01/part1/Driver.java‎

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/*
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Rixing Wu
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1/26/2015
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Lab 1
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COMP3571
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*/
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import java.io.*;
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class Driver{
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public static void main(String[] args){
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try {
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DesEncrypter DES = new DesEncrypter("smilepass", "PBEWithMD5AndDES" );
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DES.encrypt(new FileInputStream("smile.png"), new FileOutputStream("smile_encripted"));
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DES.decrypt(new FileInputStream("smile_encripted"), new FileOutputStream("smileDecripted.png"));
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DesEncrypter TDES = new DesEncrypter("smilepass", "PBEWithMD5AndTripleDES" );
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TDES.encrypt(new FileInputStream("smile.png"), new FileOutputStream("smile_3DESencripted"));
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TDES.decrypt(new FileInputStream("smile_3DESencripted"), new FileOutputStream("smile3DESDecripted"));
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}
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catch (Exception e) { System.err.println(e); }
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}
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}

‎Lab01/part1/j‎

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#! /bin/ksh
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/usr/bin/javac Driver.java
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‎Lab01/part1/jrun‎

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#!/bin/bash
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OUTPUT="$(which java)"
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RUN=`$OUTPUT Driver`
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echo $RUN
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‎Lab01/part1/smile.png‎

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‎Lab01/part2/.DS_Store‎

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‎Lab01/part2/DesEncrypter.class‎

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