2 files changed, 13 insertions, 0 deletions
diff --git a/src/common/Cryptography/Authentication/WorldPacketCrypt.cpp b/src/common/Cryptography/Authentication/WorldPacketCrypt.cpp
index 723657048d5..926f77d757d 100644
--- a/src/common/Cryptography/Authentication/WorldPacketCrypt.cpp
+++ b/src/common/Cryptography/Authentication/WorldPacketCrypt.cpp
@@ -41,6 +41,18 @@ struct WorldPacketCryptIV
     std::array<uint8, 12> Value;
 };
 
+bool WorldPacketCrypt::PeekDecryptRecv(uint8* data, size_t length)
+{
+    if (_initialized)
+    {
+        WorldPacketCryptIV iv{ _clientCounter, 0x544E4C43 };
+        if (!_clientDecrypt.ProcessNoIntegrityCheck(iv.Value, data, length))
+            return false;
+    }
+
+    return true;
+}
+
 bool WorldPacketCrypt::DecryptRecv(uint8* data, size_t length, Trinity::Crypto::AES::Tag& tag)
 {
     if (_initialized)
diff --git a/src/common/Cryptography/Authentication/WorldPacketCrypt.h b/src/common/Cryptography/Authentication/WorldPacketCrypt.h
index 5cd6e1282b8..600d0d1715e 100644
--- a/src/common/Cryptography/Authentication/WorldPacketCrypt.h
+++ b/src/common/Cryptography/Authentication/WorldPacketCrypt.h
@@ -27,6 +27,7 @@ public:
     WorldPacketCrypt();
 
     void Init(Trinity::Crypto::AES::Key const& key);
+    bool PeekDecryptRecv(uint8* data, size_t length);
     bool DecryptRecv(uint8* data, size_t length, Trinity::Crypto::AES::Tag& tag);
     bool EncryptSend(uint8* data, size_t length, Trinity::Crypto::AES::Tag& tag);