package com.mirana.frame.utils.encrypt;import com.mirana.frame.utils.log.LogUtils;
import org.apache.commons.codec.binary.Base64;import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.security.*;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;/*** Title：RSA加解密工具** @CreatedBy Mirana* @DateTime 2018/3/2315:30*/public class RSAUtils {// 字符编码格式public static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;// 换行public static final String  NEXTLINE        = System.getProperty("line.separator");// RSA 算法，Java默认"RSA"="RSA/ECB/PKCS1Padding"public static final String  ALGORITHM_RSA   = "RSA";/*** 生成指定长度的keypair，最小长度512，目前1024的长度已经很难破解** @param keysize 秘钥对长度* @return* @throws NoSuchAlgorithmException*/public static KeyPair genKeyPair (int keysize) throws NoSuchAlgorithmException {KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(ALGORITHM_RSA);keyPairGenerator.initialize(keysize);return keyPairGenerator.generateKeyPair();}/*** 公钥加密，默认UTF-8** @param contentBytes 要加密的Bytes* @param publickey    公钥* @return* @throws NoSuchAlgorithmException* @throws NoSuchPaddingException* @throws InvalidKeyException* @throws IllegalBlockSizeException* @throws BadPaddingException* @throws InvalidKeySpecException*/public static byte[] encrypt (byte[] contentBytes, PublicKey publickey)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, InvalidKeySpecException {Cipher cipher = Cipher.getInstance(ALGORITHM_RSA);cipher.init(Cipher.ENCRYPT_MODE, publickey);byte[] encryptBytes = cipher.doFinal(contentBytes);encryptBytes = Base64.encodeBase64(encryptBytes);return encryptBytes;}/*** 公钥加密字符串** @param content            要加密的文本* @param base64PublickeyStr base64编码后的公钥* @return* @throws NoSuchAlgorithmException* @throws NoSuchPaddingException* @throws InvalidKeyException* @throws IllegalBlockSizeException* @throws BadPaddingException* @throws InvalidKeySpecException*/public static String encryptStr (String content, String base64PublickeyStr)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, InvalidKeySpecException {// publickeyStr-->PublicKeybyte[] buffer = Base64.decodeBase64(base64PublickeyStr.getBytes());KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM_RSA);X509EncodedKeySpec keySpec = new X509EncodedKeySpec(buffer);PublicKey publickey = keyFactory.generatePublic(keySpec);return new String(encrypt(content.getBytes(DEFAULT_CHARSET), publickey), DEFAULT_CHARSET);}/*** 私钥解密** @param contentBytes 要解密的Bytes* @param privatekey   私钥* @return* @throws NoSuchAlgorithmException* @throws NoSuchPaddingException* @throws InvalidKeyException* @throws IllegalBlockSizeException* @throws BadPaddingException* @throws InvalidKeySpecException*/public static byte[] decrypt (byte[] contentBytes, PrivateKey privatekey)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, InvalidKeySpecException {Cipher cipher = Cipher.getInstance(ALGORITHM_RSA);cipher.init(Cipher.DECRYPT_MODE, privatekey);return cipher.doFinal(Base64.decodeBase64(contentBytes));}/*** 私钥解密字符串，默认UTF-8** @param content             要解密的文本* @param base64PrivatekeyStr Base64编码后的私钥* @return* @throws NoSuchAlgorithmException* @throws NoSuchPaddingException* @throws InvalidKeyException* @throws IllegalBlockSizeException* @throws BadPaddingException* @throws InvalidKeySpecException*/public static String decryptStr (String content, String base64PrivatekeyStr)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, InvalidKeySpecException {// privatekeyStr-->PrivateKeybyte[] buffer = Base64.decodeBase64(base64PrivatekeyStr);PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(buffer);KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM_RSA);PrivateKey privatekey = keyFactory.generatePrivate(keySpec);return new String(decrypt(content.getBytes(DEFAULT_CHARSET), privatekey), DEFAULT_CHARSET);}/*** RAS加密** @param content            原文本* @param base64PublickeyStr base64编码后的公钥* @return*/public static String rsaEncrypt (String content, String base64PublickeyStr) {StringBuffer rsaLogStr = new StringBuffer();rsaLogStr.append(NEXTLINE);rsaLogStr.append("----- [ RSA加密 ] Start -----" + NEXTLINE);rsaLogStr.append("----- [ RSA加密 ] 加密前文本：" + content + NEXTLINE);rsaLogStr.append("----- [ RSA加密 ] 公钥：" + base64PublickeyStr + NEXTLINE);try {content = encryptStr(content, base64PublickeyStr);rsaLogStr.append("----- [ RSA加密 ] 加密后文本：" + content + NEXTLINE);rsaLogStr.append("----- [ RSA加密 ] End -----" + NEXTLINE);LogUtils.info(rsaLogStr);} catch (Exception e) {rsaLogStr.append("----- [ RSA加密 ] 加密时发生异常：" + e.toString() + NEXTLINE);rsaLogStr.append("----- [ RSA加密 ] End -----" + NEXTLINE);LogUtils.error(rsaLogStr);e.printStackTrace();}return content;}/*** RSA解密** @param content             要解密的文本* @param base64PrivatekeyStr Base64编码后的私钥* @return*/public static String rsaDecrypt (String content, String base64PrivatekeyStr) {StringBuffer rsaLogStr = new StringBuffer();rsaLogStr.append(NEXTLINE);rsaLogStr.append("----- [ RSA解密 ] Start -----" + NEXTLINE);rsaLogStr.append("----- [ RSA解密 ] 解密前文本：" + content + NEXTLINE);rsaLogStr.append("----- [ RSA解密 ] 私钥：" + base64PrivatekeyStr + NEXTLINE);try {content = decryptStr(content, base64PrivatekeyStr);rsaLogStr.append("----- [ RSA解密 ] 解密后文本：" + content + NEXTLINE);rsaLogStr.append("----- [ RSA解密 ] End -----" + NEXTLINE);LogUtils.info(rsaLogStr);} catch (Exception e) {rsaLogStr.append("----- [ RSA解密 ] 解密时发生异常：" + e.toString() + NEXTLINE);rsaLogStr.append("----- [ RSA解密 ] End -----" + NEXTLINE);LogUtils.error(rsaLogStr);e.printStackTrace();}return content;}public static void main (String[] args) {KeyPair keypair = null;try {keypair = genKeyPair(512);// 公钥私钥对} catch (Exception e) {LogUtils.error("生成公钥私钥发生异常：" + e.toString());}PublicKey publickey = keypair.getPublic();// 公钥PrivateKey privatekey = keypair.getPrivate();// 私钥// 原文本String content = "{'name':'mmmirana','age':'27','phone':'17112345678'}";// base64编码后的公钥（一般从文件id_ras.pub中读取）String base64PublickeyStr = Base64.encodeBase64String(publickey.getEncoded());// base64编码后的私钥（一般从文件id_rsa中读取）String base64PrivatekeyStr = Base64.encodeBase64String(privatekey.getEncoded());// RSA加密String encryptedContent = rsaEncrypt(content, base64PublickeyStr);// RSA解密
        rsaDecrypt(encryptedContent, base64PrivatekeyStr);}
}

[INFO ]
----- [ RSA加密 ] Start -----
----- [ RSA加密 ] 加密前文本：{'name':'mmmirana','age':'27','phone':'17112345678'}
----- [ RSA加密 ] 公钥：MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAIrG4j+lLbluoG4n6pJ24YO/j4+0OIRhBFOCdERchN/np3inpo8uFw/tg5m4q1x85juqqzXTKyHrMG+dTwaSgOsCAwEAAQ==
----- [ RSA加密 ] 加密后文本：OH0/+ISqITRTaXX8fej9pDu4v/hcZmFUw6HdxZgDUNbti0SJc8mltW/QlIkODbC116/98/gmSsNTq6bUdmq3mw==
----- [ RSA加密 ] End -----[INFO ]
----- [ RSA解密 ] Start -----
----- [ RSA解密 ] 解密前文本：OH0/+ISqITRTaXX8fej9pDu4v/hcZmFUw6HdxZgDUNbti0SJc8mltW/QlIkODbC116/98/gmSsNTq6bUdmq3mw==
----- [ RSA解密 ] 私钥：MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAisbiP6UtuW6gbifqknbhg7+Pj7Q4hGEEU4J0RFyE3+eneKemjy4XD+2DmbirXHzmO6qrNdMrIeswb51PBpKA6wIDAQABAkEAhLs4RhtcIlE2zGUNLEzb4MDlNFLxA1wvYRgS0BeVVvi2+J70tk4fZ/HHyLn5TnICU/87LMStogHfNFTc7Xo3IQIhAMV5xenT2bWwRv0xpg0qgNhcRwO+5Sbak8MA/C7gFr/zAiEAs+e1d95Z/CUJ6KbYsFfjTSTBa6P8eQpeKUrFSg9e8SkCIF86ngposzA+1bz72Eu5F3E+7rALuo3GEkOTkgk43z+pAiBMFIoehg6h3fwBwkVS1egPIKMXZUMI4QSPC8rBFhz9eQIgN4cUN0EdANFCVBHtqQ9I7A2v+S2jk7yhDMsXQc8ddYM=
----- [ RSA解密 ] 解密后文本：{'name':'mmmirana','age':'27','phone':'17112345678'}
----- [ RSA解密 ] End -----