通过套接字发送数据(Java到C)

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之间发送一些加密的整数，代码如下……问题是我无法读取数字或整数！我在Java端使用writeInt函数发送数字，首先在循环中使用它分别对每个数字进行加密/解密，然后使用对称密钥对整个数字进行加密/解密。你知道怎么让它工作吗？

下面是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: %s\n", (char *)decrypted);
    return decrypted;
}

Answer 1

而不是将它们作为整数发送并使用writeInt，而是将整数作为字符串发送并在两端进行转换。也可以使用printWriter。