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RSA加密解密

发表于: 2014-09-02   作者:无量   来源:转载   浏览:
摘要: RSA加密解密代码 代码有待整理 package com.tongbanjie.commons.util; import java.security.Key; import java.security.KeyFactory; import java.security.KeyPair; import java.security.KeyPairGenerat
RSA加密解密代码

代码有待整理

package com.tongbanjie.commons.util;


import java.security.Key;

import java.security.KeyFactory;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.PrivateKey;

import java.security.interfaces.RSAPrivateKey;

import java.security.interfaces.RSAPublicKey;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.RSAPrivateKeySpec;

import java.security.spec.X509EncodedKeySpec;

import java.util.HashMap;

import java.util.Map;


import javax.crypto.Cipher;


import org.apache.commons.codec.binary.Base64;

import org.bouncycastle.asn1.ASN1Sequence;

import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure;

  

/** 

 * RSA+Base64加密解密工具类

 * RSA 一般用在数据传输过程中的加密和解密 先用RSA加密后是字节数组  再用BASE64加密 成字符串进行传输

 *      测试  RSA1024产生的公钥字节长度在160-170之间  私钥长度在630-640之间

 *      经过base64加密后长度  公钥字节产度在210-220之间  私钥长度在840-850之间

 *      所以数据库设计时如果存公钥长度设计varchar(256)  私钥长度varchar(1024)

 * @author huang.qun

 */  

public abstract class TbjRSAUtil {  

    public static final String KEY_ALGORITHM = "RSA";  

  

    private static final String PUBLIC_KEY = "rsa_public_key";  

    private static final String PRIVATE_KEY = "rsa_private_key";  

    

    private static final String ENCODING = "UTF-8";

  

    

    /** 

     * 加密 

     * 用公钥加密 

     * @param content 

     * @param base64PublicKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static String encryptByPublicKey(String content, String base64PublicKeyStr)  

            throws Exception {  

        byte[] inputBytes = content.getBytes(ENCODING);

        byte[] outputBytes = encryptByPublicKey(inputBytes, base64PublicKeyStr);

        return Base64.encodeBase64String(outputBytes);

    }

    

    /** 

     * 加密 

     * 用私钥加密 

     * @param content 

     * @param base64PrivateKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static String encryptByPrivateKey(String content, String base64PrivateKeyStr)  

            throws Exception {  

    byte[] inputBytes = content.getBytes(ENCODING);

        byte[] outputBytes = encryptByPrivateKey(inputBytes, base64PrivateKeyStr);

        return Base64.encodeBase64String(outputBytes);

    }  

    

    /** 

     * 解密 

     * 用公钥解密 

     * @param content 

     * @param base64PublicKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static String decryptByPublicKey(String content, String base64PublicKeyStr)  

            throws Exception {  

    byte[] inputBytes = Base64.decodeBase64(content);

    byte[] outputBytes = decryptByPublicKey(inputBytes, base64PublicKeyStr);

    return new String(outputBytes, ENCODING);

    }

    

    /** 

     * 解密 

     * 用私钥解密 

     * @param content 

     * @param privateKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static String decryptByPrivateKey(String content, String base64PrivateKeyStr)  

            throws Exception {  

    byte[] inputBytes = Base64.decodeBase64(content);

    byte[] outputBytes = decryptByPrivateKey(inputBytes, base64PrivateKeyStr);

    return new String(outputBytes, ENCODING);

    } 

    

    

    

    /** 

     * 加密 

     * 用公钥加密 

     * @param content 

     * @param base64PublicKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static byte[] encryptByPublicKey(byte[] content, String base64PublicKeyStr)  

            throws Exception {  

        // 对公钥解密  

        byte[] publicKeyBytes = Base64.decodeBase64(base64PublicKeyStr);  

  

        // 取得公钥  

        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(publicKeyBytes);  

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  

        Key publicKey = keyFactory.generatePublic(x509KeySpec);  

  

        // 对数据加密  

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  

        cipher.init(Cipher.ENCRYPT_MODE, publicKey);  

  

        return cipher.doFinal(content);  

    }  

    

    /** 

     * 加密 

     * 用私钥加密 

     * @param content 

     * @param base64PrivateKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static byte[] encryptByPrivateKey(byte[] content, String base64PrivateKeyStr)  

            throws Exception {  

        // 对密钥解密  

        byte[] privateKeyBytes = Base64.decodeBase64(base64PrivateKeyStr);  

  

        // 取得私钥  

        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);  

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  

        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);  

  

        // 对数据加密  

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  

        cipher.init(Cipher.ENCRYPT_MODE, privateKey);  

  

        return cipher.doFinal(content);  

    } 

    

    /** 

     * 解密 

     * 用公钥解密 

     * @param content 

     * @param base64PublicKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static byte[] decryptByPublicKey(byte[] content, String base64PublicKeyStr)  

            throws Exception {  

        // 对密钥解密  

        byte[] publicKeyBytes = Base64.decodeBase64(base64PublicKeyStr);  

  

        // 取得公钥  

        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(publicKeyBytes);  

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  

        Key publicKey = keyFactory.generatePublic(x509KeySpec);  

  

        // 对数据解密  

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  

        cipher.init(Cipher.DECRYPT_MODE, publicKey);  

  

        return cipher.doFinal(content);  

    } 

    

    /** 

     * 解密 

     * 用私钥解密

     * @param content 

     * @param privateKeyStr 

     * @return 

     * @throws Exception 

     */  

    public static byte[] decryptByPrivateKey(byte[] content, String base64PrivateKeyStr)  

            throws Exception {  

   

   

   

        // 对密钥解密  

        byte[] privateKeyBytes = Base64.decodeBase64(base64PrivateKeyStr);  

  

        RSAPrivateKeyStructure asn1PrivKey = new RSAPrivateKeyStructure((ASN1Sequence) ASN1Sequence.fromByteArray(privateKeyBytes));  

    RSAPrivateKeySpec rsaPrivKeySpec = new RSAPrivateKeySpec(asn1PrivKey.getModulus(), asn1PrivKey.getPrivateExponent());  

    KeyFactory keyFactory= KeyFactory.getInstance("RSA");  

    PrivateKey priKey= keyFactory.generatePrivate(rsaPrivKeySpec);  

        

        // 取得私钥  

//        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);  

//        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  

//        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);  

  

        // 对数据解密  

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  

        cipher.init(Cipher.DECRYPT_MODE, priKey);  

  

        return cipher.doFinal(content);  

    }  

  

  

    /** 

     * 取得私钥 

     * @param keyMap 

     * @return 

     * @throws Exception 

     */

    public static String getBase64PrivateKeyStr(Map keyMap)  

            throws Exception {  

        Key key = (Key) keyMap.get(PRIVATE_KEY);  

        return Base64.encodeBase64String(key.getEncoded());

    }  

  

    /** 

     * 取得公钥 

     * @param keyMap 

     * @return 

     * @throws Exception 

     */  

    public static String getBase64PublicKeyStr(Map keyMap)  

            throws Exception {  

        Key key = (Key) keyMap.get(PUBLIC_KEY);  

        return Base64.encodeBase64String(key.getEncoded());

    }  

  

    /** 

     * 初始化密钥 

     * @return 

     * @throws Exception 

     */  

    public static Map initKey() throws Exception {  

        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);  

        keyPairGen.initialize(1024);  //初始化RSA1024安全些

  

        KeyPair keyPair = keyPairGen.generateKeyPair();  

        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();      // 公钥  

        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();  // 私钥  

  

        Map keyMap = new HashMap(2);  

        keyMap.put(PUBLIC_KEY, publicKey);  

        keyMap.put(PRIVATE_KEY, privateKey);  

        return keyMap;  

    }  

    

    private static void test() throws Exception {

    String pubKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0Y9rmhe4fIsFrrm0m/jrbfZsq"

      + "xMYvg8qdvbSGHC9vnYm4K5p3bFBqqULAFlv2ZGjrWDFcBfa562E5hXtAoACXtsDH"

      + "8WCkhfNiPkGQn3wNDGRpfYVup/F1LdceunSu0IYDP0MACzKY1S7KM2qJi8P8YlXZ"

      + "91oyRfgb8lgqdQoXmQIDAQAB";

    String str = "123456";

    String content = encryptByPublicKey(str, pubKey);

    System.out.println(content);

   

    String priKey = "MIICXAIBAAKBgQC0Y9rmhe4fIsFrrm0m/jrbfZsqxMYvg8qdvbSGHC9vnYm4K5p3bFBqqULAFlv2ZGjrWDFcBfa562E5hXtAoACXtsDH8WCkhfNiPkGQn3wNDGRpfYVup/F1LdceunSu0IYDP0MACzKY1S7KM2qJi8P8YlXZ91oyRfgb8lgqdQoXmQIDAQABAoGAIG90BM9AKckODlamucQswRqss9v95r1DyWk69IJM5Tzmbn8onyCStRsKLY/XqU4Ur3yEI4/O9U8lhDpEFzKt6ExkITkiVcVlRuK0lkAKS4Uu4W+YoPzNLwKoL3dS1my+wPOxgswJ+QPSrYfWoGDoDNiZctskcHprplkECYI9/aECQQDXvkZl9IHXRolUCQWfS5MFWVgPwaXNP3X3gXaqdfhoopIPsZphurd+hxDWforh+KNkdRejbbwIveGTxkXqxTe3AkEA1gzPz9IAzFPx8RjkOxgRag3g+Rp+35nuLw18Rt04EODinurCsg3t5k2rOx2Fic6GVozqM3B3p4ATr4GsyhALLwJAFi8vp/47d7p+FpES7e1kgdFNF9muxes3oyrB3Adjcsb8w/ZcTJ5Zjf4vgg7jExdxHbxYoOqAwllcH8jsmZaMAwJAXdJjzF3qR6WL6PfWIijciTXoJIf+kJfyFOG+VXllt9A6xRl1mYINguMMaO75t3u02n8NsNpdOCgleMpIKJF7tQJBALsDYb59npdnKL2V0zk5bZ7Nd40dy4KbRcXIG2Ll/Lo6CeY/6Jes868R0yyuyLGP5CcayMKVAhcVk3xEWI7dluU=";

    String output = decryptByPrivateKey(content, priKey);

    System.out.println(output);

    }

    

    public static void main(String[] args) throws Exception {

    test();

/*Map keyMap = initKey();

String base64PublicKeyStr = getBase64PublicKeyStr(keyMap);

String base64PrivateKeyStr = getBase64PrivateKeyStr(keyMap);

System.out.println("公钥:" + base64PublicKeyStr);

System.out.println("私钥:" + base64PrivateKeyStr);


System.out.println("===========公钥加密私钥解密====111111=========");

String inputStr = "黄sfsfj;kasjdkf群我们这个世界真是个好玩的世界";

byte[] content = encryptByPublicKey(inputStr.getBytes(ENCODING), base64PublicKeyStr);

String str = Base64.encodeBase64String(content);

System.out.println(str.length());

System.out.println("加密输出到前台的字符串" + str);

content = Base64.decodeBase64(str);

//解密用字节数组   content

byte[] outByte = decryptByPrivateKey(content, base64PrivateKeyStr);

String outputStr = new String(outByte, ENCODING);

System.out.println("公钥加密前:" + inputStr);

System.out.println("私钥加密后:" + outputStr);


System.out.println("=============私钥加密公钥解密====222222===============");

String input = "你好谁开个房间了睡觉爱国;刻录机skdfld";

byte[] data = encryptByPrivateKey(input.getBytes(ENCODING), base64PrivateKeyStr);

String aaa = Base64.encodeBase64String(data);

System.out.println("加密输出到前台的字符串" + aaa);

data = Base64.decodeBase64(aaa);

byte[] out = decryptByPublicKey(data, base64PublicKeyStr);

String outStr = new String(out, ENCODING);

System.out.println("私钥加密前:" + input);

System.out.println("公钥解密后:" + outStr);


System.out.println("=============公钥加密私钥解密====333333===============");

String inputStr3 = "黄sfsfj群我们这个世界真是个好玩的世界";

String middleStr3 = encryptByPublicKey(inputStr3, base64PublicKeyStr);

String outputStr3 = decryptByPrivateKey(middleStr3, base64PrivateKeyStr);

System.out.println("公钥加密前:" + inputStr3);

System.out.println("私钥加密后:" + middleStr3);

System.out.println("私钥加密后:" + outputStr3);


System.out.println("===========私钥加密公钥解密====4444444=========");

String inputStr4 = "黄sfsfj群我们这个世界真是个好玩的世界";

String middleStr4 = encryptByPrivateKey(inputStr4, base64PrivateKeyStr);

String outputStr4 = decryptByPublicKey(middleStr4, base64PublicKeyStr);

System.out.println("公钥加密前:" + inputStr4);

System.out.println("私钥加密后:" + middleStr4);

System.out.println("私钥加密后:" + outputStr4);*/

}

}  




RSA加密解密

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