通过套接字(Java 到 C)发送数据

Question

我正在尝试使用对称密钥在作为客户端的 Java 和作为服务器的 C 之间发送一些加密整数，这是代码....问题是我无法读取数字或整数!!!我在 Java 端使用 writeInt 函数发送位数，首先在循环中使用它来分别加密/解密每个数字，然后我使用对称密钥加密/解密整数。知道如何让它工作吗？

这是Java代码：

public void sendData(int data) throws IOException
    {
        int dataInInt = data, numberOfDigits = 0;
        System.out.println("DATAININT =  " + dataInInt);
        while(dataInInt != 0)
        {
            dataInInt /= 10;
            numberOfDigits++;
        }
        dataInInt = data;
        System.out.println("Number of digits to be sent = " + numberOfDigits);
        dout.writeInt(numberOfDigits);

        int [] dataInDigits = new int [numberOfDigits];
        for (int j = (numberOfDigits - 1); j >= 0; j--)
        {
            dataInDigits[j] = dataInInt % 10;
            dataInInt /= 10;
        }

        int [] dataToSendInt = new int [numberOfDigits];
        for (int i = 0; i < dataToSendInt.length; i++)
        {
            dataToSendInt[i] = dataInDigits[i] ^ symmetricKeyInDigits[i % symmetricKeyInDigits.length];
            System.out.println("TOSEND = " + dataToSendInt[i]);
            dout.writeInt(dataToSendInt[i]);
        }
    }

这是C端：

char *receiveData(int sock)
{   
    int counter = 0, i = 0, j = 0;
    char buffer[256];
    bzero(buffer, 256);
    int tempKey = symmetricKeyInt, KeyDigitsNumber = 0;
    while (tempKey > 0)
    {
        tempKey /= 10;
        KeyDigitsNumber++;
    }
    tempKey = symmetricKeyInt;
    int KeyArr[KeyDigitsNumber];
    for (j = KeyDigitsNumber - 1; j >= 0; j--)
    {
        KeyArr[j] = tempKey % 10;
        tempKey = tempKey / 10;
    }
    read(sock, buffer, 255);
    int bufferSize = ntohl(*((int*)&buffer))
    char *temp;
    char *decrypted = malloc(bufferSize);
    char numBuffer[20];
    int testInt;
    int encInt;
    for (j = 0; j < bufferSize; j++)
    {
        bzero(numBuffer, 20);
        read(sock, numBuffer, 19);
        testInt = ntohl(*((int*)&numBuffer)) ^ KeyArr[j %KeyDigitsNumber];
        sprintf(temp, "%d", testInt);
        decrypted[j] = temp;
    }
    printf("THis from inside receiveData function: %sn", (char *)decrypted);
    return decrypted;
}

Answer 1

与其将它们作为整数发送并使用 writeInt，不如将整数作为字符串发送并在任一侧转换它们。也可以使用 printWriter。