【安全加密】包体签名：资源包的签名验证机制

local SECRET = "your_hmac_secret_key"
local function signResource(content)
    local hash = 0
    for i = 1, #content do
        hash = (hash * 31 + string.byte(content, i)) % 4294967296
    end
    return tostring(hash)
end
local function verifyResource(content, expectedSign)
    return signResource(content) == expectedSign
end

local function loadWithVerify(resPath, expectedSign)
    local content = loadFile(resPath)
    if not verifyResource(content, expectedSign) then
        sendluamsg("ALL", 9601, 0, 0, 0, resPath)
        return loadFile("default_" .. resPath)
    end
    return content
end