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我已经能够在客户端应用程序和服务器上加密和解密消息。从服务器发送消息并在客户端解密时遇到问题。

服务器

const crypto = require('crypto');
server.listen({
    host: '0.0.0.0',
    port: PORT,
    exclusive: false
}, (err) => {
    if (err) {
        logger.error(`Error starting server ${err}`);
    }
    else console.log(`Server started on port ${PORT}`);
}).on('connection', (socket) => {
    socket.setTimeout(1500);
    socket.state = new ClientState(socket);
    clients.push(socket);
    logger.info(`${socket.state.name} connected `);
    // Handle incoming messages from clients.
    socket.on('data', async (data) => {
       let jsontString = encryptToken('test');
       console.log("Sending this to client: " + jsontString);
       socket.write(jsontString);
    });

function encryptToken(token){
    var key = 'one test AES key';

    token = "test";

    var cipher = crypto.createCipheriv("aes-128-ecb", key, '');

    let encrypted = cipher.update(token, 'utf8', 'hex');

    encrypted += cipher.final('hex');

    console.log("Encrypted token: "+ encrypted.toString('hex'));

    return encrypted.toString('hex'); 
}

//输出：

Encrypted token: 7876427539d4ea70f6a4aa20d247adcb

此令牌值到达客户端。这是客户端代码：

客户

//main.cpp

#include "aes.h"
#include <iostream>

int main()
{
   //socket code..
   aes rijndael_ = aes("one test AES key");
   serverAnswer = socket_.sendReceive(buf);   //buf = encrypted token that came from server

   std::vector<char> resp(serverAnswer.begin(), serverAnswer.end());

   std::string decryptAnswer = rijndael_.decrypt(resp);
   std::cout << "Decrypted: " << decryptAnswer << std::endl;
}

//输出：解密：��wΓ��o@՛B��%C��B�ƌ�ǝ]��q

解密函数没有给我任何错误代码。块字节被填充为 16 的倍数。否则我会得到一个无效的长度错误。我还注意到，如果尝试使用 AES128-ecb 加密字符串“test”，服务器会从客户端输出不同的十六进制加密。

//aes.cpp

#include "aes.h"
#include <iostream>
#include <stdio.h>
#include <assert.h>
#include <sstream>
#include <algorithm>

#define GCRY_CIPHER GCRY_CIPHER_AES128   // Pick the cipher here
#define GCRY_MODE GCRY_CIPHER_MODE_ECB // Pick the cipher mode here

aes::aes(std::string k)
{
    key_ = k;
    keyLength_ = gcry_cipher_get_algo_keylen(GCRY_CIPHER);
    gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
    gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
    gcry_cipher_open(&handle, GCRY_CIPHER, GCRY_MODE, 0);
    gcry_cipher_setkey(handle, key_.c_str(), keyLength_);
}

std::string aes::decrypt(std::vector<char> const& text) { 
    gcry_error_t gcryError;
    std::cout << "the size is " << text.size() << std::endl

    size_t textLength = text.size();

    std::cout << "textLength:: " << textLength << std::endl;

    gcry_cipher_final(handle); 
    char * decBuffer = new char[textLength];
    gcryError = gcry_cipher_decrypt(handle, decBuffer, textLength, text.data(), textLength);

    if(gcryError)
    {
        printf("gcry_cipher_decrypt failed: %s/%s\n", gcry_strsource(gcryError), gcry_strerror(gcryError));
    }

    printf("outtBuffer = %s\n", decBuffer);

    std::string ret (decBuffer);

    delete [] decBuffer;
    return ret;
}

在花了一整天的时间尝试修改代码并且没有运气之后，我来到这里寻求帮助。任何可以指导我正确方向的提示都值得赞赏。如果我需要提供更多代码，请告诉我。考虑到有 2 个应用程序正在运行，我尽了最大努力使它有点像 MCV。

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