Socket通信Des加密笔记

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public void init() throws IOException, UnknownHostException { System.out.println(\); sel = Selector.open(); server = ServerSocketChannel.open(); server.configureBlocking(false); InetSocketAddress isa = new InetSocketAddress(\, thisport); server.socket().bind(isa); userlists = new Hashtable(); } public void startServer() throws IOException {

init();

server.register(sel, SelectionKey.OP_ACCEPT); while (sel.select() > 0 ) {

Set readyKeys=sel.selectedKeys(); Iterator it=readyKeys.iterator(); while(it.hasNext()) {

SelectionKey sk=(SelectionKey)it.next(); it.remove(); if (sk.isAcceptable()) {

ServerSocketChannel ssc = (ServerSocketChannel)sk.channel();

socket = (SocketChannel) ssc.accept(); System.out.println(socket.toString()); /*设置为非阻塞模式*/

socket.configureBlocking(false); String socketname =

socket.socket().getRemoteSocketAddress().toString();

socket.register(sel, SelectionKey.OP_READ); sk.interestOps(SelectionKey.OP_ACCEPT); userlists.put(socketname,socket);

System.out.println(socketname +\已经连接了！！\); } if (sk.isReadable()) { System.out.println(\);

readingsocket =(SocketChannel)sk.channel(); String ret=readMessage(readingsocket);

if (ret.equalsIgnoreCase(\)) {

sk.cancel();

readingsocket.close();

userlists.remove(readingsocket.socket().getRemoteSocketAddress().toString());

System.out.println(\message:\+ret.replace(\,

readingsocket.socket().getRemoteSocketAddress().toString())); sendMessage(ret.replace(\,

readingsocket.socket().getRemoteSocketAddress().toString())); }

Socket通信及Des之CBC加密解密

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else if (ret.length() > 0 ) {

System.out.println(\接受客户端信息 ：接收并解密客户端信息\);

System.out.println(\+ret); byte[] dataget=ret.getBytes(\); try { byte[] str6 = DesHlelper.des3DecodeCBC(key, keyiv, Base64.decodeBase64(dataget)); System.out.println(new String(str6, \)); } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace(); }

System.out.println(\服务端回复信息 ：加密回复内容并发送 \);

byte[] data=\.getBytes(\); try { byte[] str5 = DesHlelper.des3EncodeCBC(key, keyiv, data); System.out.println(new

String(Base64.encodeBase64(str5, false),\)); sendMessage(new String(Base64.encodeBase64(str5, false),\)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }

//传回信息

//sendMessage(ret); } } } } } public void sendMessage(String msg) throws IOException { ByteBuffer buffer = ByteBuffer.allocate(1024); buffer = ByteBuffer.wrap(msg.getBytes()); // ByteBuffer buffer = ByteBuffer.wrap(msg.getBytes(\ Collection channels = userlists.values(); SocketChannel sc; for (Object o : channels) { sc = (SocketChannel) o; sc.write(buffer); buffer.flip(); try { Thread.sleep(500); } catch (InterruptedException e) { e.printStackTrace(); } } }

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}

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public String readMessage(SocketChannel sc) { ByteBuffer buf = ByteBuffer.allocate(1024); try { sc.read(buf); buf.flip(); Charset charset = Charset.forName(\); CharsetDecoder decoder = charset.newDecoder(); CharBuffer charBuffer = decoder.decode(buf); result = charBuffer.toString(); System.out.println(result); } catch (IOException e) { result = \; } return result; }

public static void main(String args[]) { MsgServer ms = new MsgServer(); try { ms.startServer(); } catch (IOException e) { e.printStackTrace(); System.exit(-1); } }

1.3.2 Android客户端代码：

I. Android DES加密解密助手类代码：

mport java.security.Key;

import javax.crypto.Cipher;

import javax.crypto.SecretKeyFactory;

import javax.crypto.spec.DESedeKeySpec;

import javax.crypto.spec.IvParameterSpec;

import android.util.Base64; public class DesHlelper { public static void main(String[] args) throws Exception {

byte[]

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key=Base64.decode(\.getBytes(),Base64.DEFAULT);

byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };

byte[] data=\中国ABCabc123\.getBytes(\);

System.out.println(\加密解密\);

byte[] str3 = des3EncodeECB(key,data );

byte[] str4 = ees3DecodeECB(key, str3);

System.out.println(new String(Base64.encode(str3, Base64.DEFAULT),\));

System.out.println(new String(str4, \));

System.out.println();

System.out.println(\加密解密\);

byte[] str5 = des3EncodeCBC(key, keyiv, data);

byte[] str6 = des3DecodeCBC(key, keyiv, str5);

System.out.println(new String(Base64.encode(str5, Base64.DEFAULT),\));

System.out.println(new String(str6, \)); } /**

* ECB加密,不要IV

* @param key 密钥

* @param data 明文

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