企业微信会话存档开发与问题

不得不说企业微信会话存档那块给的sdk过于敷衍啊；比如加密算法啥的都没有；今天正好有这个需求整理下：

首选下载官方给的sdkJava版本 ；然后你会看到在解密那块注释只是会提醒你一下，不得不说太敷衍了；将代码添加解密过程

else if (args[0].equals("3")) {
            String encrypt_key = null;
            try {
                encrypt_key = RSAUtils.getPrivateKey(args[1]);
            } catch (Exception e) {
                e.printStackTrace();
            }
            long msg = Finance.NewSlice();
            ret = Finance.DecryptData(sdk,encrypt_key ,args[2], msg);
            if (ret != 0) {
                 System.out.println("getchatdata ret " + ret);
                     return;
            }
            System.out.println("decrypt ret:" + ret + " msg:" + Finance.GetContentFromSlice(msg));
            Finance.FreeSlice(msg);
        }

 

 

下面我整理了下整个流程

根据微信的api文档 问答模块；

在linux系统中使用命令

openssl
然后生成私钥：

genrsa -out app_private_key.pem 2048 # 私钥的生成
在利用私钥生成公钥：

rsa -in app_private_key.pem -pubout -out app_public_key.pem #导出公钥
这样就生成了rsa2的私钥和公钥了。可以用于支付宝的公密钥的生成

pkcs1转pkcs8
openssl pkcs8 -topk8 -inform PEM -in app_private_key.pem -outform pem -nocrypt -out pkcs8.pem

如果不转成pkcs8 则会报错java.security.InvalidKeyException: IOException : algid parse error, not a sequence；

 

这时会产生3个文档；将公钥整个都复制到要填的文本框中；将私钥复制到你的解密代码中

package com;

import java.security.KeyFactory;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.Base64;

import javax.crypto.Cipher;

/**
 * Java RSA 加密工具类 参考： https://blog.csdn.net/qy20115549/article/details/83105736
 */
public class RSAUtils {

    private static final String privKeyPEM = "-----BEGIN PRIVATE KEY-----\n" +
            "MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCSorzatM71c/j1\n" +
            "79JQwZYqeaJfQaQWXIoBD0R2ZCyo9iTWtHAIvxfUJKahu/khgFPJ2jSJ+LfeieDv\n" +
            "1MZv6qkISc3Hg6JCuMynzcEdfSGXeawOkYr2lRrOScedmo1FyB8m086HdjT6BuDZ\n" +
            "1K2H+iMZjItOggmWcZ5Bd9RLTaAOHE0WyuO1/gE3eqtgOddmvBS+OS2kB/DPTQJ1\n" +
            "CLYsnXjlGfHWrNqJEehtgRNf6spem26rE4CfWURxECram+m0wgTjCC4Ta8vARba+\n" +
            "HMdZ1ROHfqdxGL5RFC498eWkLM5HQeSeetGAWrA+RGWEO7xk8aPQGej9PsSwc1H/\n" +
            "x5h+5ntnAgMBAAECggEAQ6mmXYErMqXmDo4wTSVXBpiD7VKbxdnDsIN8Aulsljam\n" +
            "fxBZ1h9ffnu/DEhxyBywDSeMMNI8/go/akuTmZb9kp6DvvmlyQX/IbtWziWsd3ok\n" +
            "g8BzEB9zdBclbjsfz0Bt53u7BFTuUyUTYlC6FlG9Go/4xCxLAknBTdJeerUCEyAX\n" +
            "Pdk2CaUEzZJxgpgome/AjaVkIym30fMoZKodccdc0TZoBaIW+Bkaj4mvPc7x6ShK\n" +
            "rRohvpNghIttblkQqjqIdaraK7kpQNTec2MKLpLdFX3d8tiJGo+ROr7dpWKQoc6p\n" +
            "k1PwHJpCGa9en26EyY1uwHtm/+GA8rAttvyogW0M6QKBgQDDc36Bh1kJGeUQw0WI\n" +
            "a3YZLVkn7+foDzb7agJJyQUDIuWDdiRMhcqz5CW35p/BGeshCTxh6u1HYCA5hZpb\n" +
            "zD3vCrpwjF+D2MJSpMhnV/1hHtw3xTNd6jAw8AgIrrkb0iahuXf6Ad4jvzU3a/hj\n" +
            "jV7atzRvniOH+OiGX4rjeob7BQKBgQDAD97vrm/Amnim3t5BMv06PWYhwMYH7G14\n" +
            "sQ0gg+R06D8Am1l9qieQkPCRrnzXEWvCyfwJ3Zid8SItGWOXWDkGoYwbFNs5eJUh\n" +
            "x4ZkT5RMgjEXF7tSPRVGwV8P8X8xX/3QzrNbacb2KTmwuZXsqb1/vvNyP/D2eFSa\n" +
            "/cAeYmJgewKBgF6sVg3mAsG+0k8xV0ACVZ1Scwo+UgX9QLO9oMge4Bep0qTAGEsc\n" +
            "z5gdngubYazGojdJYv9HLZJSRKm4RpHKuAFPIAoeZLHX0CD6ArzUST6/FQrKsdv+\n" +
            "8ULzMeEKyU1pmR7jWPM37mNAXkWvPgzy0Ix/C545apqVfgSAySTxF+sFAoGBAKuB\n" +
            "wKex0nNgvZrt6/S27rBCQeCkP3K16u/a0wkVHj5TYmdNUnXIK3qKI3lEIpD/KoaQ\n" +
            "TjQVIQLxYH57bJaqnonQWseYMUe56Rp4DQeolJpZrDKd65W9nDFJ3nTjR5y0xnff\n" +
            "DQT1iUkqeSzaHQpwbRsVTlnYxXmi7JJXRGcdnhHfAoGAG+QMQpuuKQ2vWbU/D8tf\n" +
            "uRBwul8E1+Fa85uXQ9GpXg+exnvkr9ffycetjgclJa9vwlaeiOWU3BYrstYb0sW5\n" +
            "anh4mRzWwBBEG0Zi1k8esIAKYIa5sbl0DSXKhX35d7C92deMJXrNkCYigeaUWhBg\n" +
            "pvZ4EZ5pTd3In+34rdM6GvU=\n" +
            "-----END PRIVATE KEY-----";

    // 用此方法先获取秘钥
    public static String getPrivateKey(String str) throws Exception {

        String privKeyPEMnew = privKeyPEM.replaceAll("\\n", "").replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "");

        byte[] decoded = Base64.getDecoder().decode(privKeyPEMnew);
        RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA")
                .generatePrivate(new PKCS8EncodedKeySpec(decoded));
        // 64位解码加密后的字符串
        byte[] inputByte = Base64.getDecoder().decode(str);

        // RSA解密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, priKey);
        String outStr = new String(cipher.doFinal(inputByte));
        return outStr;
    }
}

 注意一定是要转成pkcs8文档里面的私钥；此时一定要注意微信会话文档返回的 publickey_ver 号，如果你改变了它，之前的消息还是原版本号；新消息才是最新的版本号；不然会报：BadPaddingException: Decryption error

 

还要注意的一点是Finance.java这个类的包名不能改变；不然就找不到那个libWeWorkFinanceSdk_Java.so文件 ；libWeWorkFinanceSdk_Java.so这个文件放在根目录下