From abb4b5f9b96c5cf8cfe8bab879c247ebf1169812 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Tue, 9 Jun 2020 01:13:30 -0700
Subject: [PATCH] Pad the SHA-1 hash for Gen5 and below servers

---
 Limelight/Network/PairManager.m | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Limelight/Network/PairManager.m b/Limelight/Network/PairManager.m
index 37ed76f6..9080026a 100644
--- a/Limelight/Network/PairManager.m
+++ b/Limelight/Network/PairManager.m
@@ -152,7 +152,12 @@
     else {
         challengeRespHash = [cryptoMan SHA1HashData: challengeRespHashInput];
     }
-    NSData* challengeRespEncrypted = [cryptoMan aesEncrypt:challengeRespHash withKey:aesKey];
+    
+    assert([challengeRespHash length] <= 32);
+    NSMutableData* paddedHash = [NSMutableData dataWithData:challengeRespHash];
+    [paddedHash setLength:32];
+    
+    NSData* challengeRespEncrypted = [cryptoMan aesEncrypt:paddedHash withKey:aesKey];
     
     HttpResponse* secretResp = [[HttpResponse alloc] init];
     [_httpManager executeRequestSynchronously:[HttpRequest requestForResponse:secretResp withUrlRequest:[_httpManager newChallengeRespRequest:challengeRespEncrypted]]];