From ff3733ffefdbc7bee021bec424b0c20bd1c1e05f Mon Sep 17 00:00:00 2001
From: Bryan Biedenkapp <gatekeep@gmail.com>
Date: Wed, 19 Mar 2025 22:48:27 -0400
Subject: [PATCH] starting offset for ARC4 is 0;

---
 src/common/p25/Crypto.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/common/p25/Crypto.cpp b/src/common/p25/Crypto.cpp
index 81653ea2..5cb1608a 100644
--- a/src/common/p25/Crypto.cpp
+++ b/src/common/p25/Crypto.cpp
@@ -222,7 +222,7 @@ void P25Crypto::cryptARC4_IMBE(uint8_t* imbe, DUID::E duid)
     if (m_keystream == nullptr)
         return;
 
-    uint32_t offset = 256U;
+    uint32_t offset = 0U;
     if (duid == DUID::LDU2) {
         offset += 101U;
     }