电子商务安全技术实验-最新课件

1、键入文字西安邮电大学电子商务安全技术实验一报告系 部 名 称： 经济与管理学院学 生 姓 名：韩振伟专 业 名 称：电子商务班 级：1101班学 号：02112003时 间：2014-5-10一、实验目的：通过JAVA语言，来实现对称密钥加密算法，非对称秘钥加密算法对信息的加密解密，通过实际操作加深学生对对称密钥加密、非对称秘钥加密解密的理解。二、实验内容：安装JDK，配置Java开发环境，加压eclipse，编写对称秘钥的生成、对称密钥加密、解密的程序。编写非对称秘钥加密解密的程序，用私钥对信息进行加密，用公钥对信息进行解密，然后用公钥对信息进行加密，用私钥对信息进行解密。三、实验用到的主要

2、技术及工具主要技术：Java、Bouncy Castle主要工具：Eclipse四、开发步骤：1、安装JDK，配置JAVA环境变量。2、解压eclipse。3、在eclipse中新建项目4、编写使用DES算法生成秘钥的程序。package org.zlex.chapter07_1;import java.security.Key;import java.security.SecureRandom;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import jav

3、ax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;public abstract class DESCoder public static final String KEY_ALGORITHM = "DES"public static final String CIPHER_ALGORITHM = "DES/ECB/PKCS5PADDING"private static Key toKey(byte key) throws Exception DESKeySpec dks = n

4、ew DESKeySpec(key);SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(KEY_ALGORITHM);SecretKey secretKey = keyFactory.generateSecret(dks);return secretKey;public static byte decrypt(byte data, byte key) throws Exception Key k = toKey(key);Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);

5、cipher.init(Cipher.DECRYPT_MODE, k);return cipher.doFinal(data);public static byte encrypt(byte data, byte key) throws Exception Key k = toKey(key);Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);cipher.init(Cipher.ENCRYPT_MODE, k);return cipher.doFinal(data);public static byte initKey() throws

6、 Exception KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);kg.init(56, new SecureRandom();SecretKey secretKey = kg.generateKey();return secretKey.getEncoded();package org.zlex.chapter07_1;import static org.junit.Assert.*;import mons.codec.binary.Base64;import org.junit.Test;public class DE

7、SCoderTest Testpublic final void test() throws Exception String inputStr = "DES"byte inputData = inputStr.getBytes();System.err.println("原文:t" + inputStr);byte key = DESCoder.initKey();System.err.println("密钥:t" + Base64.encodeBase64String(key);inputData = DESCoder.encry

8、pt(inputData, key);System.err.println("加密后:t" + Base64.encodeBase64String(inputData);byte outputData = DESCoder.decrypt(inputData, key);String outputStr = new String(outputData);System.err.println("解密后:t" + outputStr);assertEquals(inputStr, outputStr);5、使用生成的秘钥对“电子商务安全技术”进行加密。6、用

9、第4步骤中生成的秘钥对第5部中生成的加密后的内容进行解密。7、使用AES算法重复4-6步骤。package org.zlex.chapter07_3;import java.security.Key;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;public abstract class AESCoder public static final String KEY_ALGORITHM

10、 = "AES"public static final String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding"private static Key toKey(byte key) throws Exception SecretKey secretKey = new SecretKeySpec(key, KEY_ALGORITHM);return secretKey;public static byte decrypt(byte data, byte key) throws Exception Key k = to

11、Key(key);Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);cipher.init(Cipher.DECRYPT_MODE, k);return cipher.doFinal(data);public static byte encrypt(byte data, byte key) throws Exception Key k = toKey(key);Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);cipher.init(Cipher.ENCRYPT_MODE, k);r

12、eturn cipher.doFinal(data);public static byte initKey() throws Exception KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);kg.init(128);SecretKey secretKey = kg.generateKey();return secretKey.getEncoded();package org.zlex.chapter07_3;import static org.junit.Assert.*;import mons.codec.binary.

13、Base64;import org.junit.Test;public class AESCoderTest Testpublic final void test() throws Exception String inputStr = "AES"byte inputData = inputStr.getBytes();System.err.println("原文:t" + inputStr);byte key = AESCoder.initKey();System.err.println("密钥:t" + Base64.encode

14、Base64String(key);inputData = AESCoder.encrypt(inputData, key);System.err.println("加密后:t" + Base64.encodeBase64String(inputData);byte outputData = AESCoder.decrypt(inputData, key);String outputStr = new String(outputData);System.err.println("解密后:t" + outputStr);assertEquals(input

15、Str, outputStr);8、使用RSA算法生成公钥和私钥。package org.zlex.chapter08_2;import java.security.Key;import java.security.KeyFactory;import java.security.KeyPair;import java.security.KeyPairGenerator;import java.security.PrivateKey;import java.security.PublicKey;import erfaces.RSAPrivateKey;impor

16、t erfaces.RSAPublicKey;import java.security.spec.PKCS8EncodedKeySpec;import java.security.spec.X509EncodedKeySpec;import java.util.HashMap;import java.util.Map;import javax.crypto.Cipher;public abstract class RSACoder public static final String KEY_ALGORITHM = "RSA"private

17、 static final String PUBLIC_KEY = "RSAPublicKey"private static final String PRIVATE_KEY = "RSAPrivateKey"private static final int KEY_SIZE = 512;public static byte decryptByPrivateKey(byte data, byte key)throws Exception PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(

18、key);KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);PrivateKey privateKey = keyFactory.generatePrivate(pkcs8KeySpec);Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm();cipher.init(Cipher.DECRYPT_MODE, privateKey);return cipher.doFinal(data);public static byte decryptByPublic

19、Key(byte data, byte key)throws Exception X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(key);KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);PublicKey publicKey = keyFactory.generatePublic(x509KeySpec);Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm();cipher.init(Ci

20、pher.DECRYPT_MODE, publicKey);return cipher.doFinal(data);public static byte encryptByPublicKey(byte data, byte key)throws Exception X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(key);KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);PublicKey publicKey = keyFactory.generatePub

21、lic(x509KeySpec);Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm();cipher.init(Cipher.ENCRYPT_MODE, publicKey);return cipher.doFinal(data);public static byte encryptByPrivateKey(byte data, byte key)throws Exception PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(key);KeyFactory

22、 keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);PrivateKey privateKey = keyFactory.generatePrivate(pkcs8KeySpec);Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm();cipher.init(Cipher.ENCRYPT_MODE, privateKey);return cipher.doFinal(data);public static byte getPrivateKey(Map<String, O

23、bject> keyMap)throws Exception Key key = (Key) keyMap.get(PRIVATE_KEY);return key.getEncoded();public static byte getPublicKey(Map<String, Object> keyMap)throws Exception Key key = (Key) keyMap.get(PUBLIC_KEY);return key.getEncoded();public static Map<String, Object> initKey() throws

24、Exception KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);keyPairGen.initialize(KEY_SIZE);KeyPair keyPair = keyPairGen.generateKeyPair();RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();Map<String

25、, Object> keyMap = new HashMap<String, Object>(2);keyMap.put(PUBLIC_KEY, publicKey);keyMap.put(PRIVATE_KEY, privateKey);return keyMap;package org.zlex.chapter08_2;import static org.junit.Assert.*;import mons.codec.binary.Base64;import org.junit.Before;import org.junit.Test;import java.util.

26、Map;public class RSACoderTest private byte publicKey;private byte privateKey;Beforepublic void initKey() throws Exception Map<String, Object> keyMap = RSACoder.initKey();publicKey = RSACoder.getPublicKey(keyMap);privateKey = RSACoder.getPrivateKey(keyMap);System.err.println("公钥: n" +

27、 Base64.encodeBase64String(publicKey);System.err.println("私钥： n" + Base64.encodeBase64String(privateKey);Testpublic void test() throws Exception System.err.println("n-私钥加密公钥解密-");String inputStr1 = "RSA加密算法"byte data1 = inputStr1.getBytes();System.err.println("原文:n

28、" + inputStr1);/ 加密byte encodedData1 = RSACoder.encryptByPrivateKey(data1, privateKey);System.err.println("加密后:n" + Base64.encodeBase64String(encodedData1);byte decodedData1 = RSACoder.decryptByPublicKey(encodedData1,publicKey);String outputStr1 = new String(decodedData1);System.err.p

29、rintln("解密后:n" + outputStr1);assertEquals(inputStr1, outputStr1);System.err.println("n-公钥加密私钥解密-");String inputStr2 = "RSA Encypt Algorithm"byte data2 = inputStr2.getBytes();System.err.println("原文:n" + inputStr2);byte encodedData2 = RSACoder.encryptByPublicKey(data2, publicKey