关于Jmeter做Rsa加密解密的一些总结

先上加密脚本：

import org.apache.commons.codec.binary.Base64;
import java.io.ByteArrayOutputStream;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
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;
import javax.crypto.Cipher;
String RSA_PUB_KEY="你的公钥";//去掉首尾
String KEY_ALGORITHM = "RSA";
String SIGNATURE_ALGORITHM = "MD5withRSA";
int MAX_ENCRYPT_BLOCK = 117;
int MAX_DECRYPT_BLOCK = 128;

public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey)
            throws Exception {
        byte[] keyBytes = Base64.decodeBase64(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;
    }

    public static byte[] encryptByPublicKey(byte[] data, String publicKey)
            throws Exception {
        byte[] keyBytes = Base64.decodeBase64(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        // 对数据加密
        Cipher cipher = Cipher.getInstance("RSA");
        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;
    }
String str=vars.get("body"); 
String result ="";
try {
    result = Base64.encodeBase64String(encryptByPublicKey(str.getBytes(), RSA_PUB_KEY));
    System.out.println(result);
} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
    
print(result);
vars.put("sign",result);
vars.put("RSA_PUB_KEY",RSA_PUB_KEY);
log.info("加密串=",result);
log.info("加密body=",str);
return result;

1.因为是加密后的参数放到请求体中，所以我在另外一个beanshell定义了一个json格式的字符串，然后这就造成了一个问题:字符串带转义符,jmeter对带转义符的字符串用$来引用会直接报错！！！！解决办法是改用vars.get(“body”)来获取公共变量

2.加密后的字符串直接塞进请求体里了

3.返回的报文是私钥加密，公钥解密的密文，这里我选择了用后置处理器来解密：

输出：将解密结果输出的参数命名

输入：导入rsa公钥，这在上面的脚本已经提前定义好

操作：要是解密的是响应的json，则勾选响应文本-jsonpath表达式

　　　要是返回的直接是加密的密文，则只勾选响应文本，不勾选jsonpath，这里我是使用了这种方法

　　    针对其他变量解密，勾选变量名并输入即可

所用jmeter的版本：5.1.1 r1855173

下载地址：
链接：https://pan.baidu.com/s/1lpvmNd7jd5v7vG3IGfum2A 提取码：q8ym

参考链接：https://www.cnblogs.com/artoftest/p/7298929.html

　　　　　https://blog.csdn.net/q13554515812/article/details/99298387