From f526920f5151292b55be408c4b59f7e4a2129f12 Mon Sep 17 00:00:00 2001
From: chenjiahe <763432473@qq.com>
Date: 星期四, 14 十月 2021 10:10:01 +0800
Subject: [PATCH] 新增RSA非对称加密方法
---
src/main/java/com/hx/util/rsa/RSAUtil.java | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 120 insertions(+), 0 deletions(-)
diff --git a/src/main/java/com/hx/util/rsa/RSAUtil.java b/src/main/java/com/hx/util/rsa/RSAUtil.java
new file mode 100644
index 0000000..45349a3
--- /dev/null
+++ b/src/main/java/com/hx/util/rsa/RSAUtil.java
@@ -0,0 +1,120 @@
+package com.hx.util.rsa;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sun.misc.BASE64Decoder;
+import sun.misc.BASE64Encoder;
+
+import javax.crypto.Cipher;
+import java.io.IOException;
+import java.security.*;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+
+public class RSAUtil {
+
+ //log4j鏃ュ織
+ private static Logger logger = LoggerFactory.getLogger(RSAUtil.class.getName());
+
+ /**鐢熸垚绉橀挜瀵�*/
+ public static KeyPair getKeyPair() throws Exception {
+ KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
+ keyPairGenerator.initialize(2048);
+ KeyPair keyPair = keyPairGenerator.generateKeyPair();
+ return keyPair;
+ }
+
+ /**鑾峰彇鍏挜(Base64缂栫爜)*/
+ public static String getPublicKey(KeyPair keyPair) {
+ PublicKey publicKey = keyPair.getPublic();
+ byte[] bytes = publicKey.getEncoded();
+ return byte2Base64(bytes);
+ }
+
+ /**鑾峰彇绉侀挜(Base64缂栫爜)*/
+ public static String getPrivateKey(KeyPair keyPair) {
+ PrivateKey privateKey = keyPair.getPrivate();
+ byte[] bytes = privateKey.getEncoded();
+ return byte2Base64(bytes);
+ }
+
+ /**灏咮ase64缂栫爜鍚庣殑鍏挜杞崲鎴怭ublicKey瀵硅薄*/
+ public static PublicKey string2PublicKey(String pubStr) throws Exception {
+ byte[] keyBytes = base642Byte(pubStr);
+ X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
+ KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+ PublicKey publicKey = keyFactory.generatePublic(keySpec);
+ return publicKey;
+ }
+
+ /**灏咮ase64缂栫爜鍚庣殑绉侀挜杞崲鎴怭rivateKey瀵硅薄*/
+ public static PrivateKey string2PrivateKey(String priStr) throws Exception {
+ byte[] keyBytes = base642Byte(priStr);
+ PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);
+ KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+ PrivateKey privateKey = keyFactory.generatePrivate(keySpec);
+ return privateKey;
+ }
+
+ /**鍏挜鍔犲瘑*/
+ public static String publicEncrypt(String content, String publicKey) {
+ try {
+ Cipher cipher = Cipher.getInstance("RSA");
+ cipher.init(Cipher.ENCRYPT_MODE, string2PublicKey(publicKey));
+ byte[] bytes = cipher.doFinal(content.getBytes());
+ return byte2Base64(bytes);
+ } catch (Exception e) {
+ logger.error("鍏挜鍔犲瘑澶辫触{}", e);
+ }
+ return null;
+ }
+
+ /**绉侀挜瑙ｅ瘑*/
+ public static String privateDecrypt(String content, String privateKey) {
+ try {
+ Cipher cipher = Cipher.getInstance("RSA");
+ cipher.init(Cipher.DECRYPT_MODE, string2PrivateKey(privateKey));
+ byte[] bytes = cipher.doFinal(base642Byte(content));
+ return new String(bytes);
+ } catch (Exception e) {
+ logger.error("绉侀挜瑙ｅ瘑澶辫触{}", e);
+ }
+ return null;
+ }
+
+ //瀛楄妭鏁扮粍杞珺ase64缂栫爜
+ public static String byte2Base64(byte[] bytes) {
+ BASE64Encoder encoder = new BASE64Encoder();
+ return encoder.encode(bytes);
+ }
+
+ //Base64缂栫爜杞瓧鑺傛暟缁�
+ public static byte[] base642Byte(String base64Key) throws IOException {
+ BASE64Decoder decoder = new BASE64Decoder();
+ return decoder.decodeBuffer(base64Key);
+ }
+
+ public static void main(String[] args) {
+ try {
+
+ KeyPair keyPair = getKeyPair();
+ String publicKeyStr = getPublicKey(keyPair);
+ String privateKeyStr = getPrivateKey(keyPair);
+ System.out.println("publicKey:"+publicKeyStr);
+ System.out.println("privateKey:"+privateKeyStr);
+
+ //String publicKeyStr = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCWY1VKIXGStXOMtSkb2nqV9A4V6MqlTPv8Dg9Sdxm8TZgOYJJxFAjpUOwt0au6q5JDTrslZngg9um1IhNJlRLEySbTvN7Bzeq6XOpZx5w6XRZ+7/o0Ui4YvcYwIHB5DgS5XJnLa3vLqWOk4NAtY0lqC20170mHi5Fmjdak63OTzwIDAQAB";
+ //=================瀹㈡埛绔�=================
+ String message = "jia_he";
+ //鐢ㄥ叕閽ュ姞瀵�
+ String byte2Base64 = RSAUtil.publicEncrypt(message, publicKeyStr);
+ System.out.println("鍏挜鍔犲瘑骞禕ase64缂栫爜鐨勭粨鏋滐細" + byte2Base64);
+ //===================鏈嶅姟绔�================
+ //String privateKeyStr = "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";
+ //瑙ｅ瘑鍚庣殑鏄庢枃
+ System.out.println("瑙ｅ瘑鍚庣殑鏄庢枃: " +RSAUtil.privateDecrypt(byte2Base64, privateKeyStr));
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+}
--
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