def preScan():
    cprintc("Running prescan checks...", "cyan")
    jwtOut(jwt, "Prescan: original token", "Prescan: original token")
    if config['argvals']['canaryvalue']:
        if config['argvals']['canaryvalue'] not in config['argvals']['rescontent']:
            cprintc("Canary value ("+config['argvals']['canaryvalue']+") was not found in base request - check that this token is valid and you are still logged in", "red")
            shallWeGoOn = input("Do you wish to continue anyway? (\"Y\" or \"N\")")
            if shallWeGoOn == "N":
                exit(1)
            elif shallWeGoOn == "n":
                exit(1)
    origResSize, origResCode = config['argvals']['ressize'], config['argvals']['rescode']
    jwtOut("null", "Prescan: no token", "Prescan: no token")
    nullResSize, nullResCode = config['argvals']['ressize'], config['argvals']['rescode']
    if config['argvals']['canaryvalue'] == "":
        if origResCode == nullResCode:
            cprintc("Valid and missing token requests return the same Status Code.\nYou should probably specify something from the page that identifies the user is logged-in (e.g. -cv \"Welcome back, ticarpi!\")", "red")
            shallWeGoOn = input("Do you wish to continue anyway? (\"Y\" or \"N\")")
            if shallWeGoOn == "N":
                exit(1)
            elif shallWeGoOn == "n":
                exit(1)
    jwtTweak = contents.decode()+"."+sig[:-4]
    jwtOut(jwtTweak, "Prescan: Broken signature", "This token was sent to check if the signature is being checked")
    jwtOut(jwt, "Prescan: repeat original token", "Prescan: repeat original token")
    if origResCode != config['argvals']['rescode']:
        cprintc("Original token not working after invalid submission. Testing will need to be done manually, re-authenticating after each invalid submission", "red")
        exit(1)

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