javaweb 前后台rsa加解密 源码

package com.sinovatech.util.rsa; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.math.BigInteger; import java.security.Key; import java.security.KeyFactory; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.SecureRandom; import java.security.interfaces.RSAPrivateKey; import java.security.interfaces.RSAPublicKey; import java.security.spec.RSAPrivateKeySpec; import java.security.spec.RSAPublicKeySpec; import java.util.Calendar; import java.util.HashMap; import java.util.Map; import javax.crypto.Cipher; import org.bouncycastle.jce.provider.BouncyCastleProvider; public class RSAUtils { public static final int KEYSIZE = 512; private static volatile BouncyCastleProvider bouncyCastleProvider = null; public static BouncyCastleProvider getInstance() { if(null == bouncyCastleProvider){ synchronized(RSAUtils.class){ if(null == bouncyCastleProvider){ bouncyCastleProvider = new BouncyCastleProvider(); } } } return bouncyCastleProvider; } public static void main(String[] args) throws Exception { long btime = Calendar.getInstance().getTimeInMillis(); for (int i = 0; i < 10000; i++) { if(i%100==0){ System.out.println(i+"----"+(Calendar.getInstance().getTimeInMillis()-btime)); } RSAUtils rsa = new RSAUtils(); // rsa.createKey(); Map<String,Object> keyMap = rsa.createKey(); RSAPublicKey publicKey = (RSAPublicKey) keyMap.get("publicKey"); RSAPrivateKey privateKey = (RSAPrivateKey) keyMap.get("privateKey"); String endata = rsa.encrypttoStr(publicKey,"12345"); String data = rsa.decrypttoStr(privateKey,endata); String Modulus = publicKey.getModulus().toString(16); //公钥指数 String Exponent = publicKey.getPublicExponent().toString(16); //私钥指数 String private_exponent = privateKey.getPrivateExponent().toString(); // System.out.println("Exponent:"+Exponent); // System.out.println("Modulus:"+Modulus); //使用模和指数获取公钥 RSAPublicKey pukey = getPublicKey(publicKey.getModulus().toString(), publicKey.getPublicExponent().toString()); RSAPrivateKey prkey = getPrivateKey(publicKey.getModulus().toString(),private_exponent); String jspwd ="376e08b67b5553bd738b2a8e45c9074c1296d46a3bb85345666f73bbfefcf7467d6272db9e3194bd47cd1fce63c69e03c705aae23caf01f4f3ffbe23ec111fc6"; RandUtil rand = new RandUtil(); // String data_16 = rand.parseByte2HexStr(jspwd.getBytes()); // System.out.println("js解密长度"+jspwd.length()); String data2 = rsa.decrypttoStr(privateKey,jspwd); System.out.println(i); // System.out.println("js解密"+data2); // System.out.println("加密后内容："+new String(endata)); // System.out.println("解密后内容："+new String(data)); } } /** * 加密 * @param publicKey 公钥 * @param content 要加密的内容 * @return * @throws Exception */ public String encrypttoStr(Key publicKey,String content) throws Exception{ RandUtil rand = new RandUtil(); String endata = rand.parseByte2HexStr(publicEnrypy(publicKey,content)); return endata; } /** * 解密 * @param privateKey 私钥 * @param endata 要解密的内容 * @return * @throws Exception */ public String decrypttoStr(Key privateKey,String endata) throws Exception{ RandUtil rand = new RandUtil(); String data = new String(privateEncode(privateKey,rand.parseHexStr2Byte(endata))); return data; } public String decrypttoStr_normal(Key privateKey,String endata) throws Exception{ String data = new String(privateEncode(privateKey,endata.getBytes())); return data; } /** * 加密的方方法,使用公钥进行加密 * @param publicKey 公钥 * @param data �?要加密的数据 * @throws Exception */ public static byte[] publicEnrypy(Key publicKey,String data) throws Exception { Cipher cipher = Cipher.getInstance("RSA",getInstance()); // 设置为加密模�? cipher.init(Cipher.ENCRYPT_MODE, publicKey); // 对数据进行加�? byte[] result = cipher.doFinal(data.getBytes()); return result; } /** * 解密的方法，使用私钥进行解密 * privateKey 私钥 * encoData �?要解密的数据 * @throws Exception */ public static byte[] privateEncode(Key privateKey,byte[] encoData) throws Exception { Cipher cipher = Cipher.getInstance("RSA",getInstance()); //设置为解密模式，用私钥解�? cipher.init(Cipher.DECRYPT_MODE, privateKey); //解密 byte[] data = cipher.doFinal(encoData); // System.out.println("解密后的数据�?"+data); return data; } /** * 自动生成密钥 * @throws Exception */ public Map<String,Object> createKey(){ try { // Cipher cipher = Cipher.getInstance("RSA"); KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA", getInstance()); SecureRandom random = new SecureRandom(); keyPairGenerator.initialize(RSAUtils.KEYSIZE, random); // 生成钥匙 KeyPair keyPair = keyPairGenerator.generateKeyPair(); // 得到公钥 RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic(); // 得到私钥 RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate(); Map<String,Object> map = new HashMap<String, Object>(); map.put("publicKey", publicKey); map.put("privateKey", privateKey); return map; } catch (Exception e) { e.printStackTrace(); return null; } } /** * 从硬盘中加载私钥 * @return * @throws IOException * @throws FileNotFoundException * @throws ClassNotFoundException */ public Key loadKey(String keyUrl) throws IOException, FileNotFoundException, ClassNotFoundException { ObjectInputStream inputStream = new ObjectInputStream( new FileInputStream(new File(keyUrl))); Key key = (Key) inputStream.readObject(); return key; } /** * 把私钥或则公钥保存到硬盘 * @param privateKey * @throws IOException * @throws FileNotFoundException */ private void saveKey(Key key,String saveUrl) throws IOException, FileNotFoundException { ObjectOutputStream outputStream = new ObjectOutputStream( new FileOutputStream(new File(saveUrl))); outputStream.writeObject(key); } /** * 使用模和指数生成RSA公钥 * * * @param modulus * @param exponent * 指数 * @return */ public static RSAPublicKey getPublicKey(String modulus, String exponent) { try { BigInteger b1 = new BigInteger(modulus); BigInteger b2 = new BigInteger(exponent); KeyFactory keyFactory = KeyFactory.getInstance("RSA", getInstance()); RSAPublicKeySpec keySpec = new RSAPublicKeySpec(b1, b2); return (RSAPublicKey) keyFactory.generatePublic(keySpec); } catch (Exception e) { e.printStackTrace(); return null; } } /** * 使用模和指数生成RSA私钥 * /None/NoPadding * * @p