From a359b47b84c12ba699186ae8151cca2ba7d34a3b Mon Sep 17 00:00:00 2001
From: Lev Rusanov <30170278+JDM170@users.noreply.github.com>
Date: Thu, 2 Jun 2022 23:23:05 +0700
Subject: [PATCH] Added lua-side for decode and load model in MTA

Signed-off-by: Lev Rusanov <30170278+JDM170@users.noreply.github.com>
---
 lua/_decoder_client.lua | 40 --------------------------
 lua/_decoder_server.lua |  4 ---
 lua/meta.xml            |  9 ++++++
 lua/stub.lua            | 62 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+), 44 deletions(-)
 delete mode 100644 lua/_decoder_client.lua
 delete mode 100644 lua/_decoder_server.lua
 create mode 100644 lua/meta.xml
 create mode 100644 lua/stub.lua

diff --git a/lua/_decoder_client.lua b/lua/_decoder_client.lua
deleted file mode 100644
index 71dfcd7..0000000
--- a/lua/_decoder_client.lua
+++ /dev/null
@@ -1,40 +0,0 @@
-local pass = nil
-local function loadFile(path)
-    local file = fileOpen(path)
-    if not file then
-        return error("No such file ".. path)
-    end
-
-    local data = fileRead(file, fileGetSize(file))
-    fileClose(file)
-    return data
-end
-
-function include(file_name)
-    local file = loadFile(file_name)
-
-    return assert(loadstring(file))
-end
-
-
-function decodeLoadTXD(filename)
-    return engineLoadTXD(decodeString("tea", loadFile(filename .. 'c'), {key = pass}))
-end
-
-function decodeLoadDFF(filename)
-    return engineLoadDFF(decodeString("tea", loadFile(filename .. 'c'), {key = pass}))
-end
-
-function decodeLoadCOL(filename)
-    return engineLoadCOL(decodeString("tea", loadFile(filename .. 'c'), {key = pass}))
-end
-
-addEvent("setPass", true)
-addEventHandler("setPass", resourceRoot, function(new_pass)
-    pass = new_pass
-    --CLIENT CONTENT HERE
-end)
-
-triggerServerEvent("requestPass", resourceRoot)
-
-addDebugHook("preFunction", function(_, _, _, _, _, ...) return "skip" end, {"addDebugHook"})
\ No newline at end of file
diff --git a/lua/_decoder_server.lua b/lua/_decoder_server.lua
deleted file mode 100644
index 4cfb336..0000000
--- a/lua/_decoder_server.lua
+++ /dev/null
@@ -1,4 +0,0 @@
-addEvent("requestPass", true)
-addEventHandler("requestPass", resourceRoot, function()
-	triggerClientEvent(client, "setPass", resourceRoot, sha256(get("pass")))
-end)
\ No newline at end of file
diff --git a/lua/meta.xml b/lua/meta.xml
new file mode 100644
index 0000000..f53905a
--- /dev/null
+++ b/lua/meta.xml
@@ -0,0 +1,9 @@
+<meta>
+    <info author="JDM17" name="Decoder for XaskeL's locked cars" type="script" />
+    <min_mta_version client="1.5.6-9.18728" />
+
+    <script src="stub.lua" type="client" cache="false" />
+
+    <export function="fileDecode" type="client" />
+    <export function="safetyDelete" type="client" />
+</meta>
\ No newline at end of file
diff --git a/lua/stub.lua b/lua/stub.lua
new file mode 100644
index 0000000..18881a5
--- /dev/null
+++ b/lua/stub.lua
@@ -0,0 +1,62 @@
+
+local blockSize = 12
+local encodeSize = 3000 * blockSize
+
+local symbolsTable = {}
+for i=48, 122 do
+    if (i <= 57) or (i >= 65) and (i <= 90) or (i >= 97) then
+        table.insert(symbolsTable, string.char(i))
+    end
+end
+
+local function lFileDecode(path, password, useRAM)
+    if not fileExists(path) then
+        return false, "File not found"
+    end
+    local encodedFile = fileOpen(path)
+    if (not encodedFile) then
+        return false, "File corrupted"
+    end
+    local encodedData = fileRead(encodedFile, encodeSize)
+    fileSetPos(encodedFile, encodeSize)
+    local origData = fileRead(encodedFile, fileGetSize(encodedFile) - encodeSize)
+    fileClose(encodedFile)
+    local truePassword = string.sub(utf8.lower(md5(password)), 1, 16)
+    local block
+    local decoded = ""
+    for i = 1, encodeSize, blockSize do
+        block = teaDecode(string.sub(encodedData, i, i + blockSize), truePassword)
+        if type(tonumber(block)) ~= "number" then
+            return false, "Wrong password"
+        end
+        decoded = decoded..string.char(block)
+    end
+    if (not useRAM) then
+        local decodedFileName = ""
+        for i = 1, 64 do
+            decodedFileName = decodedFileName..symbolsTable[math.random(#symbolsTable)]
+        end
+        local decodedFile = fileCreate(decodedFileName)
+        fileWrite(decodedFile, decoded..origData)
+        fileClose(decodedFile)
+        return true, string.format(":%s/%s", getResourceName(getThisResource()), decodedFileName)
+    else
+        return true, decoded..origData
+    end
+end
+local function lSafetyDelete(path)
+    local file = fileCreate(path)
+    fileWrite(file, "PROTECTED BY XASKEL")
+    fileClose(file)
+    setTimer(fileDelete, 100, 1, path)
+end
+
+-- Экспортные функции
+function fileDecode(pt, ps, rm)
+    return lFileDecode(pt, ps, rm)
+end
+function safetyDelete(pt)
+    lSafetyDelete(pt)
+end
+
+addDebugHook("preFunction", function(_, _, _, _, _, ...) return "skip" end, {"addDebugHook"})