Springboot集成RSA加密

Springboot集成RSA加密

    • 1 : RSA加密介绍
    • 2 : RSA依赖
    • 3 : RSA加密工具类
    • 4 : 测试截图
    • 5 : 相关链接
    • 6 : 资源链接

1 : RSA加密介绍

RSA公开密钥密码体制是一种使用不同的加密密钥与解密密钥,“由已知加密密钥推导出解密密钥在计算上是不可行的”密码体制。
特点:安全性高,运算速度相对较慢。
其余可以搜一下,很多介绍。

2 : RSA依赖

依赖

<!-- poi -->
<dependency>
	<groupId>org.apache.poi</groupId>
	<artifactId>poi</artifactId>
	<version>4.1.2</version>
</dependency>
<dependency>
	<groupId>org.apache.poi</groupId>
	<artifactId>poi-ooxml</artifactId>
	<version>4.1.2</version>
</dependency>

完成pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.7.5</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.export</groupId>
	<artifactId>export</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>export</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-aop</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

		<!-- poi -->
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>4.1.2</version>
		</dependency>
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>4.1.2</version>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<mainClass>com.encrypt.EncryptApplication</mainClass>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>

3 : RSA加密工具类

Base64Utils.java

package com.encrypt.config.utils;

import org.apache.xmlbeans.impl.util.Base64;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

public class Base64Utils {
    /**
     * 文件读取缓冲区大小
     */
    private static final int CACHE_SIZE = 1024;

    /**
     * BASE64字符串解码为二进制数据
     */
    public static byte[] decode(String base64) throws Exception {
        return Base64.decode(base64.getBytes());
    }

    /**
     * 二进制数据编码为BASE64字符串
     */
    public static String encode(byte[] bytes){
        return new String(Base64.encode(bytes));
    }

    /**
     * 将文件编码为BASE64字符串,大文件慎用,可能会导致内存溢出
     * @param filePath 文件绝对路径
     */
    public static String encodeFile(String filePath) throws Exception {
        byte[] bytes = fileToByte(filePath);
        return encode(bytes);
    }

    /**
     * BASE64字符串转回文件
     * @param filePath 文件绝对路径
     * @param base64 编码字符串
     */
    public static void decodeToFile(String filePath, String base64) throws Exception {
        byte[] bytes = decode(base64);
        byteArrayToFile(bytes, filePath);
    }

    /**
     * 文件转换为二进制数组
     * @param filePath 文件路径
     */
    public static byte[] fileToByte(String filePath) throws Exception {
        byte[] data = new byte[0];
        File file = new File(filePath);
        if (file.exists()) {
            try ( FileInputStream in = new FileInputStream(file);
                  ByteArrayOutputStream out = new ByteArrayOutputStream(2048);) {
                byte[] cache = new byte[CACHE_SIZE];
                int nRead = 0;
                while ((nRead = in.read(cache)) != -1) {
                    out.write(cache, 0, nRead);
                    out.flush();
                }
                data = out.toByteArray();
            }
        }
        return data;
    }

    /**
     * 二进制数据写文件
     * @param bytes 二进制数据
     * @param filePath 文件生成目录
     */
    public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception {
        File destFile = new File(filePath);
        try (InputStream in = new ByteArrayInputStream(bytes);
             OutputStream out = new FileOutputStream(destFile);) {
            if (!destFile.getParentFile().exists()) {
                destFile.getParentFile().mkdirs();
            }
            destFile.createNewFile();
            byte[] cache = new byte[CACHE_SIZE];
            int nRead = 0;
            while ((nRead = in.read(cache)) != -1) {
                out.write(cache, 0, nRead);
                out.flush();
            }
        }
    }

}

RSAUtils.java

package com.encrypt.config.utils;

import javax.crypto.Cipher;
import java.io.ByteArrayOutputStream;
import java.security.Key;
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.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

public class RSAUtils {

    //RSA 获取公钥的key
    public static final String RSA_PUBLIC_KEY = "RSA_PublicKey";
    //RSA 获取私钥的key
    public static final String RSA_PRIVATE_KEY = "RSA_PrivateKey";
    // 加密算法RSA
    public static final String KEY_ALGORITHM = "RSA";
    //初始化密钥大小
    public static final Integer INITIALIZE = 1024;
    //RSA最大加密明文大小
    public static final Integer MAX_ENCRYPT_BLOCK = 117;
    //RSA最大解密密文大小
    public static final Integer MAX_DECRYPT_BLOCK = 128;
    //签名算法
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";

    /**
     * 生成密钥对(公钥和私钥)
     */
    public static Map<String, Object> generateRSAKeyPair() throws NoSuchAlgorithmException {
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
        keyPairGen.initialize(INITIALIZE);
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
        return new HashMap<String, Object>(){{
            put(RSA_PUBLIC_KEY, publicKey);
            put(RSA_PRIVATE_KEY, privateKey);
        }};
    }

    /**
     * 获取公钥
     * @param keyMap 密钥对
     */
    public static String getRSAPublicKey(Map<String, Object> keyMap){
        Key key = (Key) keyMap.get(RSA_PUBLIC_KEY);
        return Base64Utils.encode(key.getEncoded());
    }

    /**
     * 获取私钥
     * @param keyMap 密钥对
     */
    public static String getRSAPrivateKey(Map<String, Object> keyMap){
        Key key = (Key) keyMap.get(RSA_PRIVATE_KEY);
        return Base64Utils.encode(key.getEncoded());
    }

    /**
     * 公钥加密
     * @param data 源数据
     * @param publicKey 公钥(BASE64编码)
     */
    public static byte[] encryptByPublicKey(byte[] data, String publicKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        // 对数据加密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, publicK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        return encryptedData;
    }

    /**
     * 私钥解密
     * @param encryptedData 已加密数据
     * @param privateKey 私钥(BASE64编码)
     */
    public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, privateK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段解密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        return decryptedData;
    }


    /**
     * 公钥解密
     * @param encryptedData 已加密数据
     * @param publicKey 公钥(BASE64编码)
     */
    public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, publicK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段解密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        return decryptedData;
    }

    /**
     * 私钥加密
     * @param data 源数据
     * @param privateKey 私钥(BASE64编码)
     */
    public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, privateK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        return encryptedData;
    }

    /**
     * 用私钥对信息生成数字签名
     * @param data 已加密数据
     * @param privateKey 私钥(BASE64编码)
     */
    public static String sign(byte[] data, String privateKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initSign(privateK);
        signature.update(data);
        return Base64Utils.encode(signature.sign());
    }

    /**
     * 校验数字签名
     * @param data 已加密数据
     * @param publicKey 公钥(BASE64编码)
     * @param sign 数字签名
     *
     */
    public static boolean verify(byte[] data, String publicKey, String sign) throws Exception {
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PublicKey publicK = keyFactory.generatePublic(keySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initVerify(publicK);
        signature.update(data);
        return signature.verify(Base64Utils.decode(sign));
    }


    public static void main(String[] args) throws Exception{
        System.out.println("********************生成公钥、私钥********************");
        Map<String, Object> map = generateRSAKeyPair();
        System.out.println("RSA公钥:" + getRSAPublicKey(map));
        System.out.println("RSA私钥:" + getRSAPrivateKey(map));
        String publicKey = getRSAPublicKey(map);
        String privateKey = getRSAPrivateKey(map);
        String json = "中文,abc,!@#";

        //公钥加密
        System.out.println("********************公钥加密、生成数字签名、数字签名校验、私钥解密********************");
        System.out.println("字符串:" + json);
        String encryptPublic = Base64Utils.encode(encryptByPublicKey(json.getBytes(), publicKey));
        System.out.println("公钥加密后字符串:" + encryptPublic);

        //生成数字签名
        String signKey = sign(Base64Utils.decode(encryptPublic), privateKey);
        System.out.println("公钥加密后数字签名:" + signKey);
        //校验数字签名
        boolean verify = verify(Base64Utils.decode(encryptPublic), publicKey, signKey);
        System.out.println("公钥加密后数字签名校验:" + verify);

        //私钥解密
        System.out.println("私钥解密后字符串:" + new String(decryptByPrivateKey(Base64Utils.decode(encryptPublic), privateKey)));

        System.out.println("********************私钥加密、公钥解密********************");
        //私钥加密
        System.out.println();
        System.out.println("字符串:" + json);
        String encryptPrivate = Base64Utils.encode(encryptByPrivateKey(json.getBytes(), privateKey));
        System.out.println("私钥加密后字符串:" + encryptPrivate);
        //公钥解密
        System.out.println("公钥解密后字符串:" + new String(decryptByPublicKey(Base64Utils.decode(encryptPrivate), publicKey)));

    }

}

4 : 测试截图

Springboot集成RSA加密_第1张图片

5 : 相关链接

Springboot项目报文加密(采用AES、RSA动态加密策略):
https://blog.csdn.net/qq_38254635/article/details/129275971
Springboot集成AES加密:
https://blog.csdn.net/qq_38254635/article/details/129622075

6 : 资源链接

CSDN源项目下载:https://download.csdn.net/download/qq_38254635/87587334
百度网盘下载:https://pan.baidu.com/s/1OZBrTYIuoKmWknIPFvZ8Vw?pwd=nnm8
提取码:nnm8

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