From 6d759899d85939c95f2b97c8e041d7b4865208f9 Mon Sep 17 00:00:00 2001
From: WitherOrNot
Date: Sat, 1 Mar 2025 02:01:39 -0500
Subject: Add partial support (zcid, rtmr, non-functional kms4k) for vista

Co-authored-by: InvoxiPlayGames <22731889+InvoxiPlayGames@users.noreply.github.com>
---
 LibTSforge/Crypto/CryptoUtils.cs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'LibTSforge/Crypto/CryptoUtils.cs')

diff --git a/LibTSforge/Crypto/CryptoUtils.cs b/LibTSforge/Crypto/CryptoUtils.cs
index 4851570..11c2413 100644
--- a/LibTSforge/Crypto/CryptoUtils.cs
+++ b/LibTSforge/Crypto/CryptoUtils.cs
@@ -106,10 +106,21 @@ namespace LibTSforge.Crypto
 
         public static bool HMACVerify(byte[] key, byte[] data, byte[] signature)
         {
-            HMACSHA1 hmac = new HMACSHA1(key);
             return Enumerable.SequenceEqual(signature, HMACSign(key, data));
         }
 
+        public static byte[] SaltSHASum(byte[] salt, byte[] data)
+        {
+            SHA1 sha1 = SHA1.Create();
+            byte[] sha_data = salt.Concat(data).ToArray();
+            return sha1.ComputeHash(sha_data);
+        }
+
+        public static bool SaltSHAVerify(byte[] salt, byte[] data, byte[] checksum)
+        {
+            return Enumerable.SequenceEqual(checksum, SaltSHASum(salt, data));
+        }
+
         public static byte[] SHA256Hash(byte[] data)
         {
             using (SHA256 sha256 = SHA256.Create())
-- 
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