之所以引入这篇文章，是因为je里有人问到 https 加密用户名和密码的问题，如果仅仅是为了用户名和密码的加密，不一定要用https。
可以用js利用公钥对用户名和密码（加个随机数防止重放）进行加密，只有你的服务器拥有私钥，也就是只有你能解读用户名和密码的信息。
注意在submit前要用js将用户名和密码赋空之类的，要不随着加密有数据一起提交就没有意义了。
以前QQ邮箱就是这么做的。 具体实现思路如下：
1。服务端生成公钥与私钥，保存。
2。客户端在请求到登录页面后，随机生成一字符串。
3。后此随机字符串作为密钥加密密码，再用从服务端获取到的公钥加密生成的随机字符串。
4。将此两段密文传入服务端，服务端用私钥解出随机字符串，再用此私钥解出加密的密文。
这其中有一个关键是解决服务端的公钥，传入客户端，客户端用此公钥加密字符串后，后又能在服务端用私钥解出。
此文即为实现此步而作。
加密算法为RSA：
1。服务端的RSA java实现。
Java代码
/**
*
*/
package com.sunsoft.struts.util; import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.KeyFactory;
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;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec; import javax.crypto.Cipher;
/**
* RSA 工具类。提供加密，解密，生成密钥对等方法。
* 需要到http://www.bouncycastle.org下载bcprov-jdk14-123.jar。
*
*/
public class RSAUtil {
/**
* * 生成密钥对 *
*
* @return KeyPair *
* @throws EncryptException
*/
public static KeyPair generateKeyPair() throws Exception {
try {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
final int KEY_SIZE = 1024;// 没什么好说的了，这个值关系到块加密的大小，可以更改，但是不要太大，否则效率会低
keyPairGen.initialize(KEY_SIZE, new SecureRandom());
KeyPair keyPair = keyPairGen.generateKeyPair();
saveKeyPair(keyPair);
return keyPair;
} catch (Exception e) {
throw new Exception(e.getMessage());
}
} public static KeyPair getKeyPair()throws Exception{
FileInputStream fis = new FileInputStream("C:/RSAKey.txt");
ObjectInputStream oos = new ObjectInputStream(fis);
KeyPair kp= (KeyPair) oos.readObject();
oos.close();
fis.close();
return kp;
} public static void saveKeyPair(KeyPair kp)throws Exception{
FileOutputStream fos = new FileOutputStream("C:/RSAKey.txt");
ObjectOutputStream oos = new ObjectOutputStream(fos);
//生成密钥
oos.writeObject(kp);
oos.close();
fos.close();
} /**
* * 生成公钥 *
*
* @param modulus *
* @param publicExponent *
* @return RSAPublicKey *
* @throws Exception
*/
public static RSAPublicKey generateRSAPublicKey(byte[] modulus,
byte[] publicExponent) throws Exception {
KeyFactory keyFac = null;
try {
keyFac = KeyFactory.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
} catch (NoSuchAlgorithmException ex) {
throw new Exception(ex.getMessage());
} RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(
modulus), new BigInteger(publicExponent));
try {
return (RSAPublicKey) keyFac.generatePublic(pubKeySpec);
} catch (InvalidKeySpecException ex) {
throw new Exception(ex.getMessage());
}
} /**
* * 生成私钥 *
*
* @param modulus *
* @param privateExponent *
* @return RSAPrivateKey *
* @throws Exception
*/
public static RSAPrivateKey generateRSAPrivateKey(byte[] modulus,
byte[] privateExponent) throws Exception {
KeyFactory keyFac = null;
try {
keyFac = KeyFactory.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
} catch (NoSuchAlgorithmException ex) {
throw new Exception(ex.getMessage());
} RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(new BigInteger(
modulus), new BigInteger(privateExponent));
try {
return (RSAPrivateKey) keyFac.generatePrivate(priKeySpec);
} catch (InvalidKeySpecException ex) {
throw new Exception(ex.getMessage());
}
} /**
* * 加密 *
*
* @param key
* 加密的密钥 *
* @param data
* 待加密的明文数据 *
* @return 加密后的数据 *
* @throws Exception
*/
public static byte[] encrypt(PublicKey pk, byte[] data) throws Exception {
try {
Cipher cipher = Cipher.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, pk);
int blockSize = cipher.getBlockSize();// 获得加密块大小，如：加密前数据为128个byte，而key_size=1024
// 加密块大小为127
// byte,加密后为128个byte;因此共有2个加密块，第一个127
// byte第二个为1个byte
int outputSize = cipher.getOutputSize(data.length);// 获得加密块加密后块大小
int leavedSize = data.length % blockSize;
int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
: data.length / blockSize;
byte[] raw = new byte[outputSize * blocksSize];
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize)
cipher.doFinal(data, i * blockSize, blockSize, raw, i
* outputSize);
else
cipher.doFinal(data, i * blockSize, data.length - i
* blockSize, raw, i * outputSize);
// 这里面doUpdate方法不可用，查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到
// ByteArrayOutputStream中，而最后doFinal的时候才将所有的byte[]进行加密，可是到了此时加密块大小很可能已经超出了
// OutputSize所以只好用dofinal方法。 i++;
}
return raw;
} catch (Exception e) {
throw new Exception(e.getMessage());
}
} /**
* * 解密 *
*
* @param key
* 解密的密钥 *
* @param raw
* 已经加密的数据 *
* @return 解密后的明文 *
* @throws Exception
*/
public static byte[] decrypt(PrivateKey pk, byte[] raw) throws Exception {
try {
Cipher cipher = Cipher.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(cipher.DECRYPT_MODE, pk);
int blockSize = cipher.getBlockSize();
ByteArrayOutputStream bout = new ByteArrayOutputStream(64);
int j = 0; while (raw.length - j * blockSize > 0) {
bout.write(cipher.doFinal(raw, j * blockSize, blockSize));
j++;
}
return bout.toByteArray();
} catch (Exception e) {
throw new Exception(e.getMessage());
}
} /**
* * *
*
* @param args *
* @throws Exception
*/
public static void main(String[] args) throws Exception {
RSAPublicKey rsap = (RSAPublicKey) RSAUtil.generateKeyPair().getPublic();
String test = "hello world";
byte[] en_test = encrypt(getKeyPair().getPublic(),test.getBytes());
byte[] de_test = decrypt(getKeyPair().getPrivate(),en_test);
System.out.println(new String(de_test));
}
}
2.测试页面：
IndexAction.java
Java代码
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.sunsoft.struts.action; import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey; import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping; import com.sunsoft.struts.util.RSAUtil;
/**
* MyEclipse Struts
* Creation date: 06-28-2008
*
* XDoclet definition:
* @struts.action validate="true"
*/
public class IndexAction extends Action {
/*
* Generated Methods
*/ /**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)throws Exception { RSAPublicKey rsap = (RSAPublicKey) RSAUtil.getKeyPair().getPublic();
String module = rsap.getModulus().toString(16);
String empoent = rsap.getPublicExponent().toString(16);
System.out.println("module");
System.out.println(module);
System.out.println("empoent");
System.out.println(empoent);
request.setAttribute("m", module);
request.setAttribute("e", empoent);
return mapping.findForward("login");
}
}
通过此action进入登录页面，并传入公钥的 Modulus 与PublicExponent的hex编码形式。
3。登录页面 login.jsp
Html代码
<%@ page language="java" pageEncoding="GBK"%> <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
<html:base /> <title>login</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="js/RSA.js"></script>
<script type="text/javascript" src="js/BigInt.js"></script>
<script type="text/javascript" src="js/Barrett.js"></script>
<script type="text/javascript">
function rsalogin()
{
bodyRSA();
var result = encryptedString(key, document.getElementById("pwd").value);
//alert(result);
loginForm.action="login.do?result="+result;
loginForm.submit();
}
var key ;
function bodyRSA()
{
setMaxDigits(130);
key = new RSAKeyPair("10001","","8c1cd09a04ed01aafe70dc84c5f32ae23a16fe8fc8898aba6797c5a9c708720de4f08dbf086af429fc51c0636208f56de20a8ab5686affd9bdfb643ae1e90d5617155c4867eef06b0884ba8ecd187907c7069ae3eed4f0155eeca6573411864035ae803ad8fd91a0cc479f27e41b19c13465ab30f3cfbfd14de56f49cbd09481"); }
</script>
</head> <body >
<html:form action="login" method="post" focus="username">
<table border="0">
<tr>
<td>Login:</td>
<td><html:text property="username" /></td>
</tr>
<tr>
<td>Password:</td>
<td><html:password property="password" styleId="pwd"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="button" value="SUBMIT" οnclick="rsalogin();"/></td>
</tr>
</table>
</html:form>
</body>
</html:html>
3.点击登录后，调用LoginAction.java
Java代码
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.sunsoft.struts.action; import java.math.BigInteger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping; import com.sunsoft.struts.util.RSAUtil;
/**
* MyEclipse Struts
* Creation date: 06-28-2008
*
* XDoclet definition:
* @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true"
* @struts.action-forward name="error" path="/error.jsp"
* @struts.action-forward name="success" path="/success.jsp"
*/
public class LoginAction extends Action {
/*
* Generated Methods
*/ /**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception{
//LoginForm loginForm = (LoginForm) form;
String result = request.getParameter("result");
System.out.println("原文加密后为：");
System.out.println(result);
byte[] en_result = new BigInteger(result, 16).toByteArray();
System.out.println("转成byte[]"+new String(en_result));
byte[] de_result = RSAUtil.decrypt(RSAUtil.getKeyPair().getPrivate(),en_result);
System.out.println("还原密文："); System.out.println(new String(de_result));
StringBuffer sb = new StringBuffer();
sb.append(new String(de_result));
System.out.println(sb.reverse().toString());
return mapping.findForward("success");
}
}
因为发现解出的明文是倒序的，后面就用StringBuffer的reverse()来转换了一下。
4。login.jsp所调用的js
之所以引入这篇文章，是因为je里有人问到 https 加密用户名和密码的问题，如果仅仅是为了用户名和密码的加密，不一定要用https。
可以用js利用公钥对用户名和密码（加个随机数防止重放）进行加密，只有你的服务器拥有私钥，也就是只有你能解读用户名和密码的信息。
注意在submit前要用js将用户名和密码赋空之类的，要不随着加密有数据一起提交就没有意义了。
以前QQ邮箱就是这么做的。
具体实现思路如下：
1。服务端生成公钥与私钥，保存。
2。客户端在请求到登录页面后，随机生成一字符串。
3。后此随机字符串作为密钥加密密码，再用从服务端获取到的公钥加密生成的随机字符串。
4。将此两段密文传入服务端，服务端用私钥解出随机字符串，再用此私钥解出加密的密文。
这其中有一个关键是解决服务端的公钥，传入客户端，客户端用此公钥加密字符串后，后又能在服务端用私钥解出。
此文即为实现此步而作。
加密算法为RSA：
1。服务端的RSA java实现。
Java代码
/**
*
*/
package com.sunsoft.struts.util; import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.KeyFactory;
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;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec; import javax.crypto.Cipher;
/**
* RSA 工具类。提供加密，解密，生成密钥对等方法。
* 需要到http://www.bouncycastle.org下载bcprov-jdk14-123.jar。
*
*/
public class RSAUtil {
/**
* * 生成密钥对 *
*
* @return KeyPair *
* @throws EncryptException
*/
public static KeyPair generateKeyPair() throws Exception {
try {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
final int KEY_SIZE = 1024;// 没什么好说的了，这个值关系到块加密的大小，可以更改，但是不要太大，否则效率会低
keyPairGen.initialize(KEY_SIZE, new SecureRandom());
KeyPair keyPair = keyPairGen.generateKeyPair();
saveKeyPair(keyPair);
return keyPair;
} catch (Exception e) {
throw new Exception(e.getMessage());
}
} public static KeyPair getKeyPair()throws Exception{
FileInputStream fis = new FileInputStream("C:/RSAKey.txt");
ObjectInputStream oos = new ObjectInputStream(fis);
KeyPair kp= (KeyPair) oos.readObject();
oos.close();
fis.close();
return kp;
} public static void saveKeyPair(KeyPair kp)throws Exception{
FileOutputStream fos = new FileOutputStream("C:/RSAKey.txt");
ObjectOutputStream oos = new ObjectOutputStream(fos);
//生成密钥
oos.writeObject(kp);
oos.close();
fos.close();
} /**
* * 生成公钥 *
*
* @param modulus *
* @param publicExponent *
* @return RSAPublicKey *
* @throws Exception
*/
public static RSAPublicKey generateRSAPublicKey(byte[] modulus,
byte[] publicExponent) throws Exception {
KeyFactory keyFac = null;
try {
keyFac = KeyFactory.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
} catch (NoSuchAlgorithmException ex) {
throw new Exception(ex.getMessage());
} RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(
modulus), new BigInteger(publicExponent));
try {
return (RSAPublicKey) keyFac.generatePublic(pubKeySpec);
} catch (InvalidKeySpecException ex) {
throw new Exception(ex.getMessage());
}
} /**
* * 生成私钥 *
*
* @param modulus *
* @param privateExponent *
* @return RSAPrivateKey *
* @throws Exception
*/
public static RSAPrivateKey generateRSAPrivateKey(byte[] modulus,
byte[] privateExponent) throws Exception {
KeyFactory keyFac = null;
try {
keyFac = KeyFactory.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
} catch (NoSuchAlgorithmException ex) {
throw new Exception(ex.getMessage());
} RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(new BigInteger(
modulus), new BigInteger(privateExponent));
try {
return (RSAPrivateKey) keyFac.generatePrivate(priKeySpec);
} catch (InvalidKeySpecException ex) {
throw new Exception(ex.getMessage());
}
} /**
* * 加密 *
*
* @param key
* 加密的密钥 *
* @param data
* 待加密的明文数据 *
* @return 加密后的数据 *
* @throws Exception
*/
public static byte[] encrypt(PublicKey pk, byte[] data) throws Exception {
try {
Cipher cipher = Cipher.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, pk);
int blockSize = cipher.getBlockSize();// 获得加密块大小，如：加密前数据为128个byte，而key_size=1024
// 加密块大小为127
// byte,加密后为128个byte;因此共有2个加密块，第一个127
// byte第二个为1个byte
int outputSize = cipher.getOutputSize(data.length);// 获得加密块加密后块大小
int leavedSize = data.length % blockSize;
int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
: data.length / blockSize;
byte[] raw = new byte[outputSize * blocksSize];
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize)
cipher.doFinal(data, i * blockSize, blockSize, raw, i
* outputSize);
else
cipher.doFinal(data, i * blockSize, data.length - i
* blockSize, raw, i * outputSize);
// 这里面doUpdate方法不可用，查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到
// ByteArrayOutputStream中，而最后doFinal的时候才将所有的byte[]进行加密，可是到了此时加密块大小很可能已经超出了
// OutputSize所以只好用dofinal方法。 i++;
}
return raw;
} catch (Exception e) {
throw new Exception(e.getMessage());
}
} /**
* * 解密 *
*
* @param key
* 解密的密钥 *
* @param raw
* 已经加密的数据 *
* @return 解密后的明文 *
* @throws Exception
*/
public static byte[] decrypt(PrivateKey pk, byte[] raw) throws Exception {
try {
Cipher cipher = Cipher.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(cipher.DECRYPT_MODE, pk);
int blockSize = cipher.getBlockSize();
ByteArrayOutputStream bout = new ByteArrayOutputStream(64);
int j = 0; while (raw.length - j * blockSize > 0) {
bout.write(cipher.doFinal(raw, j * blockSize, blockSize));
j++;
}
return bout.toByteArray();
} catch (Exception e) {
throw new Exception(e.getMessage());
}
} /**
* * *
*
* @param args *
* @throws Exception
*/
public static void main(String[] args) throws Exception {
RSAPublicKey rsap = (RSAPublicKey) RSAUtil.generateKeyPair().getPublic();
String test = "hello world";
byte[] en_test = encrypt(getKeyPair().getPublic(),test.getBytes());
byte[] de_test = decrypt(getKeyPair().getPrivate(),en_test);
System.out.println(new String(de_test));
}
}
2.测试页面：
IndexAction.java
Java代码
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.sunsoft.struts.action; import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey; import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping; import com.sunsoft.struts.util.RSAUtil;
/**
* MyEclipse Struts
* Creation date: 06-28-2008
*
* XDoclet definition:
* @struts.action validate="true"
*/
public class IndexAction extends Action {
/*
* Generated Methods
*/ /**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)throws Exception { RSAPublicKey rsap = (RSAPublicKey) RSAUtil.getKeyPair().getPublic();
String module = rsap.getModulus().toString(16);
String empoent = rsap.getPublicExponent().toString(16);
System.out.println("module");
System.out.println(module);
System.out.println("empoent");
System.out.println(empoent);
request.setAttribute("m", module);
request.setAttribute("e", empoent);
return mapping.findForward("login");
}
}
通过此action进入登录页面，并传入公钥的 Modulus 与PublicExponent的hex编码形式。
3。登录页面 login.jsp
Html代码
<%@ page language="java" pageEncoding="GBK"%> <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
<html:base /> <title>login</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="js/RSA.js"></script>
<script type="text/javascript" src="js/BigInt.js"></script>
<script type="text/javascript" src="js/Barrett.js"></script>
<script type="text/javascript">
function rsalogin()
{
bodyRSA();
var result = encryptedString(key, document.getElementById("pwd").value);
//alert(result);
loginForm.action="login.do?result="+result;
loginForm.submit();
}
var key ;
function bodyRSA()
{
setMaxDigits(130);
key = new RSAKeyPair("10001","","8c1cd09a04ed01aafe70dc84c5f32ae23a16fe8fc8898aba6797c5a9c708720de4f08dbf086af429fc51c0636208f56de20a8ab5686affd9bdfb643ae1e90d5617155c4867eef06b0884ba8ecd187907c7069ae3eed4f0155eeca6573411864035ae803ad8fd91a0cc479f27e41b19c13465ab30f3cfbfd14de56f49cbd09481"); }
</script>
</head> <body >
<html:form action="login" method="post" focus="username">
<table border="0">
<tr>
<td>Login:</td>
<td><html:text property="username" /></td>
</tr>
<tr>
<td>Password:</td>
<td><html:password property="password" styleId="pwd"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="button" value="SUBMIT" οnclick="rsalogin();"/></td>
</tr>
</table>
</html:form>
</body>
</html:html>
3.点击登录后，调用LoginAction.java
Java代码
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.sunsoft.struts.action; import java.math.BigInteger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping; import com.sunsoft.struts.util.RSAUtil;
/**
* MyEclipse Struts
* Creation date: 06-28-2008
*
* XDoclet definition:
* @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true"
* @struts.action-forward name="error" path="/error.jsp"
* @struts.action-forward name="success" path="/success.jsp"
*/
public class LoginAction extends Action {
/*
* Generated Methods
*/ /**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception{
//LoginForm loginForm = (LoginForm) form;
String result = request.getParameter("result");
System.out.println("原文加密后为：");
System.out.println(result);
byte[] en_result = new BigInteger(result, 16).toByteArray();
System.out.println("转成byte[]"+new String(en_result));
byte[] de_result = RSAUtil.decrypt(RSAUtil.getKeyPair().getPrivate(),en_result);
System.out.println("还原密文："); System.out.println(new String(de_result));
StringBuffer sb = new StringBuffer();
sb.append(new String(de_result));
System.out.println(sb.reverse().toString());
return mapping.findForward("success");
}
}
因为发现解出的明文是倒序的，后面就用StringBuffer的reverse()来转换了一下。
4。login.jsp所调用的js
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