From 77167943f041b98c212a9182b4769568ed3fa8d3 Mon Sep 17 00:00:00 2001
From: JinGen Lim <1116555+jglim@users.noreply.github.com>
Date: Sat, 4 Feb 2023 21:15:41 +0800
Subject: [PATCH] Add HU45:7

---
 UnlockECU/UnlockECU/Security/HU45Algo.cs | 34 ++++++++++++++++++++++++
 UnlockECU/db.json                        | 10 +++++++
 2 files changed, 44 insertions(+)
 create mode 100644 UnlockECU/UnlockECU/Security/HU45Algo.cs

diff --git a/UnlockECU/UnlockECU/Security/HU45Algo.cs b/UnlockECU/UnlockECU/Security/HU45Algo.cs
new file mode 100644
index 0000000..c7bb90f
--- /dev/null
+++ b/UnlockECU/UnlockECU/Security/HU45Algo.cs
@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace UnlockECU
+{
+    /// <summary>
+    /// HU45Algo as found in HU45_hu45_sec_12_05_01, Intended for level 7 (CBF)
+    /// No algo name was formally specified, this name is unofficial
+    /// </summary>
+    class HU45Algo : SecurityProvider
+    {
+        public override bool GenerateKey(byte[] inSeed, byte[] outKey, int accessLevel, List<Parameter> parameters)
+        {
+            if ((inSeed.Length != 2) || (outKey.Length != 2))
+            {
+                return false;
+            }
+            // Levels, input and output length are not checked
+            // Only 2 bytes are checked and modified
+            int partial = ~(inSeed[0] + (inSeed[1] << 8)) - 0x307;
+            outKey[0] = (byte)(partial >> 8);
+            outKey[1] = (byte)(~inSeed[0] - 7);
+            return true;
+        }
+
+        public override string GetProviderName()
+        {
+            return "HU45Algo";
+        }
+    }
+}
diff --git a/UnlockECU/db.json b/UnlockECU/db.json
index 0909503..ceed5d2 100644
--- a/UnlockECU/db.json
+++ b/UnlockECU/db.json
@@ -4204,6 +4204,16 @@
       }
     ]
   },
+  {
+    "EcuName": "HU45",
+    "Aliases": [],
+    "AccessLevel": 7,
+    "SeedLength": 2,
+    "KeyLength": 2,
+    "Provider": "HU45Algo",
+    "Origin": "HU45_hu45_sec_12_05_01",
+    "Parameters": []
+  },
   {
     "EcuName": "HU7",
     "Aliases": [],