给你个RSA的Java版本,不知道漫步满足你的需求。package com.google.algorithm;import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.OutputStreamWriter; import java.math.BigInteger; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.NoSuchAlgorithmException; import java.security.PrivateKey; import java.security.PublicKey; import java.security.SecureRandom; import java.security.interfaces.RSAPrivateKey; import java.security.interfaces.RSAPublicKey;public class RSA { public static void main(String[] args) throws NoSuchAlgorithmException, IOException, ClassNotFoundException { KeyPair pair = generateKeyPair(); PrivateKey privateKey = pair.getPrivate(); PublicKey publicKey = pair.getPublic(); // Save Pirvate Key FileOutputStream f1 = new FileOutputStream("private.ppk"); ObjectOutputStream b1 = new ObjectOutputStream(f1); b1.writeObject(privateKey); // Save Public Key FileOutputStream f2 = new FileOutputStream("public.ppk"); ObjectOutputStream b2 = new ObjectOutputStream(f2); b2.writeObject(publicKey); encrypt();
decrypt(); } public static void encrypt() throws IOException, ClassNotFoundException { String msg = "Hello World!"; FileInputStream f = new FileInputStream("public.ppk"); ObjectInputStream b = new ObjectInputStream(f); RSAPublicKey pbk = (RSAPublicKey) b.readObject(); // RSA算法是使用整数进行加密的,在RSA公钥中包含有两个整数信息:e和n。对于明文数字m,计算密文的公式是m的e次方再与n求模。 BigInteger e = pbk.getPublicExponent(); BigInteger n = pbk.getModulus(); // 获取明文的大整数 byte ptext[] = msg.getBytes("utf-8"); BigInteger m = new BigInteger(ptext); // 加密明文 BigInteger c = m.modPow(e, n);
// 打印密文c System.out.println("c= " + c);
// 将密文以字符串形式保存在文件中 String cs = c.toString(); BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("encrypt.dat"), "utf-8")); out.write(cs, 0, cs.length()); out.close(); } public static void decrypt() throws IOException, ClassNotFoundException { BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream("encrypt.dat"), "utf-8")); String ctext = in.readLine(); BigInteger c = new BigInteger(ctext);
// 获取私钥 FileInputStream f = new FileInputStream("private.ppk"); ObjectInputStream b = new ObjectInputStream(f); RSAPrivateKey prk = (RSAPrivateKey) b.readObject();
// 获取私钥的参数d,n BigInteger d = prk.getPrivateExponent(); BigInteger n = prk.getModulus();
// 解密明文 BigInteger m = c.modPow(d, n);
// 计算明文对应的字符串并输出。 byte[] mt = m.toByteArray(); System.out.println("PlainText is " + new String(mt, "utf-8"));
} public static KeyPair generateKeyPair() throws NoSuchAlgorithmException { KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA"); final int KEY_SIZE = 1024; keyPairGen.initialize(KEY_SIZE, new SecureRandom()); KeyPair keyPair = keyPairGen.genKeyPair(); return keyPair; }}
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStreamWriter;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;public class RSA
{
public static void main(String[] args) throws NoSuchAlgorithmException, IOException, ClassNotFoundException
{
KeyPair pair = generateKeyPair();
PrivateKey privateKey = pair.getPrivate();
PublicKey publicKey = pair.getPublic(); // Save Pirvate Key
FileOutputStream f1 = new FileOutputStream("private.ppk");
ObjectOutputStream b1 = new ObjectOutputStream(f1);
b1.writeObject(privateKey); // Save Public Key
FileOutputStream f2 = new FileOutputStream("public.ppk");
ObjectOutputStream b2 = new ObjectOutputStream(f2);
b2.writeObject(publicKey); encrypt();
decrypt(); } public static void encrypt() throws IOException, ClassNotFoundException
{
String msg = "Hello World!"; FileInputStream f = new FileInputStream("public.ppk");
ObjectInputStream b = new ObjectInputStream(f);
RSAPublicKey pbk = (RSAPublicKey) b.readObject(); // RSA算法是使用整数进行加密的,在RSA公钥中包含有两个整数信息:e和n。对于明文数字m,计算密文的公式是m的e次方再与n求模。
BigInteger e = pbk.getPublicExponent();
BigInteger n = pbk.getModulus(); // 获取明文的大整数
byte ptext[] = msg.getBytes("utf-8");
BigInteger m = new BigInteger(ptext); // 加密明文
BigInteger c = m.modPow(e, n);
// 打印密文c
System.out.println("c= " + c);
// 将密文以字符串形式保存在文件中
String cs = c.toString();
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("encrypt.dat"), "utf-8"));
out.write(cs, 0, cs.length());
out.close(); } public static void decrypt() throws IOException, ClassNotFoundException
{
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream("encrypt.dat"), "utf-8"));
String ctext = in.readLine();
BigInteger c = new BigInteger(ctext);
// 获取私钥
FileInputStream f = new FileInputStream("private.ppk");
ObjectInputStream b = new ObjectInputStream(f);
RSAPrivateKey prk = (RSAPrivateKey) b.readObject();
// 获取私钥的参数d,n
BigInteger d = prk.getPrivateExponent();
BigInteger n = prk.getModulus();
// 解密明文
BigInteger m = c.modPow(d, n);
// 计算明文对应的字符串并输出。
byte[] mt = m.toByteArray();
System.out.println("PlainText is " + new String(mt, "utf-8"));
} public static KeyPair generateKeyPair() throws NoSuchAlgorithmException
{
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
final int KEY_SIZE = 1024;
keyPairGen.initialize(KEY_SIZE, new SecureRandom());
KeyPair keyPair = keyPairGen.genKeyPair();
return keyPair;
}}
http://blog.csdn.net/zhiqiangzhan/archive/2009/10/12/4658106.aspx
我原创的,不知道漫步满足你的需求。
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class Coder
{
private String DefualKey = "$J.Smile";
public Coder(String strKey)
{
DefualKey = formatKey(strKey);
}
public static String oEncoder(String strKey, String data)
{
return new Coder(strKey).Encoder(data);
}
public String Encoder(String data)
{
String str = desEncrypt(data, DefualKey);
if (str != null)
{
char[] c1 = str.toCharArray();
char c = 0;
for (int i=0; i<c1.length; i++)
{
if (i%2 != 0)
{
c1[i-1] = c1[i];
c1[i] = c;
}
else
c = c1[i];
}
return desEncrypt(new String(c1), DefualKey);
}
else
{
return null;
}
}
public String Decoder(String data)
{
String str = desDecrypt(data, DefualKey);
if (str != null)
{
char[] c1 = str.toCharArray();
char c = 0;
for (int i=0; i<c1.length; i++)
{
if (i%2 != 0)
{
c1[i-1] = c1[i];
c1[i] = c;
}
else
c = c1[i];
}
return desDecrypt(new String(c1), DefualKey);
}
else
{
return null;
}
}
private static String desEncrypt(String message, String key)
{
String str = null;
try
{
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
str = new BASE64Encoder().encode(cipher.doFinal(message.getBytes("UTF-8")));
}
catch(Exception e)
{
e.printStackTrace();
}
return str;
}
private String desDecrypt(String message, String key)
{
String str = null;
try
{
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
str = new String(cipher.doFinal(new BASE64Decoder().decodeBuffer(message)));
}
catch(Exception e)
{
e.printStackTrace();
}
return str;
}
private String formatKey(String inKey)
{
if (inKey == null || inKey.equals(""))
inKey = this.DefualKey;
else
inKey = "########" + inKey;
int iKeyLength = inKey.length();
return inKey.substring(iKeyLength-8, iKeyLength);
}
public static void main(String[] args)
{
Coder coder = new Coder("secretKey");
System.out.println(coder.Encoder("password"));
System.out.println(coder.Decoder(coder.Encoder("password")));
Coder coder2 = new Coder("secretKey");
System.out.println(coder2.Decoder(coder.Encoder("password")));
}
}