[SOLVED] python recv() and eval()

python recv() and eval()

can someone please help me understand this code

clientsock.send("Welcome to Maths_Server 1.0\n")

try:
    clientsock.send("Enter the first number, so I can EVALuate it:\n")
    firstNum = eval(clientsock.recv(1024))
    firstNum = firstNum + firstNum + ord(flag[4]) + ord(flag[8]) + ord(flag[5])
    clientsock.send("Enter the second number, so I can EVALuate it:\n")
    secondNum = eval(clientsock.recv(1024))
    if secondNum == firstNum:
        clientsock.send("The flag is: " + flag + "\n")
        firstNum = 0
        secondNum = 0
except:
    pass

clientsock.close()

i want to know what does recv() does and how can i make the if statement true

Solution

Well, you can't determine the firstNum value because it's inputted by the user, so you input a random number into the firstNum, then for the secondNum you enter firstNum, so what this does is the eval() takes the firstNum value and convert it into string for the secondNum which will make the if-statement true. Hope this works out.