From 10629c8c318f065fc3fed7dd09519bb37914dab6 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Tue, 27 Oct 2026 22:13:46 +0000
Subject: [PATCH] Decompile 2 functions in Source/Utility/Cipher/Rijndael.cpp,
 Source/Utility/Cipher/Rijndael.h

Batch #1232 by ragnarok-clanker: 0 byte-identical, 2 confirmed by peer review.

- fn_04399 DecryptAes192: logic confirmed by peer review
- fn_04400 DecryptAes256: logic confirmed by peer review

Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Utility/Cipher/Rijndael.cpp | 28 ++++++++++++++++++++++++++++
 Source/Utility/Cipher/Rijndael.h   |  3 +++
 2 files changed, 31 insertions(+)

diff --git a/Source/Utility/Cipher/Rijndael.cpp b/Source/Utility/Cipher/Rijndael.cpp
index 3698649a..e79db57c 100644
--- a/Source/Utility/Cipher/Rijndael.cpp
+++ b/Source/Utility/Cipher/Rijndael.cpp
@@ -22,6 +22,34 @@ static constexpr const char* s_errorBlockLength = "Incorrect block length";
 
 static constexpr const char* s_errorDataLength = "Data not multiple of Block Size";
 
+// GLOBAL: gl_24465
+static unsigned char s_defaultAesKey[32] = {
+  0x06, 0xA9, 0x21, 0x40, 0x36, 0xB8, 0xA1, 0x5B, 0x51, 0x2E, 0x03, 0xD5, 0x34, 0x12, 0x00, 0x06,
+  0x06, 0xA9, 0x21, 0x40, 0x36, 0xB8, 0xA1, 0x5B, 0x51, 0x2E, 0x03, 0xD5, 0x34, 0x12, 0x00, 0x06,
+};
+
+// GLOBAL: gl_24466
+static unsigned char s_defaultAesChain[32] = {
+  0x3D, 0xAF, 0xBA, 0x42, 0x9D, 0x9E, 0xB4, 0x30, 0xB4, 0x22, 0xDA, 0x80, 0x2C, 0x9F, 0xAC, 0x41,
+  0x3D, 0xAF, 0xBA, 0x42, 0x9D, 0x9E, 0xB4, 0x30, 0xB4, 0x22, 0xDA, 0x80, 0x2C, 0x9F, 0xAC, 0x41,
+};
+
+// OFFSET: 0x00617EA0
+// FUNCTION: fn_04399
+void DecryptAes192(const char* input, char* output) {
+  CRijndael cipher;
+  cipher.MakeKey(reinterpret_cast<const char*>(s_defaultAesKey), reinterpret_cast<const char*>(s_defaultAesChain), 24, 24);
+  cipher.DecryptBlock(input, output);
+}
+
+// OFFSET: 0x00617F40
+// FUNCTION: fn_04400
+void DecryptAes256(const char* input, char* output) {
+  CRijndael cipher;
+  cipher.MakeKey(reinterpret_cast<const char*>(s_defaultAesKey), reinterpret_cast<const char*>(s_defaultAesChain), 32, 32);
+  cipher.DecryptBlock(input, output);
+}
+
 const char* CRijndael::sm_chain0 = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
 
 const int CRijndael::sm_shifts[3][4][2] = {{{0, 0}, {1, 3}, {2, 2}, {3, 1}}, {{0, 0}, {1, 5}, {2, 4}, {3, 3}}, {{0, 0}, {1, 7}, {3, 5}, {4, 4}}};
diff --git a/Source/Utility/Cipher/Rijndael.h b/Source/Utility/Cipher/Rijndael.h
index 040e43b5..7f7b8fa9 100644
--- a/Source/Utility/Cipher/Rijndael.h
+++ b/Source/Utility/Cipher/Rijndael.h
@@ -77,6 +77,9 @@ private:
   /* 0454 */ int t[MAX_BC];
 };
 
+void DecryptAes192(const char* input, char* output);
+void DecryptAes256(const char* input, char* output);
+
 #if defined(_WIN32) && !defined(_WIN64)
 static_assert(sizeof(CRijndael) == 0x474);
 #endif