From 5a4bbc98007be983d27d0818bb7b5c77c64b6d41 Mon Sep 17 00:00:00 2001
From: Peter0x44 <peter0x44@snopyta.org>
Date: Sun, 8 May 2022 17:52:17 +0100
Subject: [PATCH] Add Konami code to skip certain wad safety checks, so region
 changing is possible

---
 source/menu.c | 22 +++++++++++++++++++++-
 source/wad.c  | 12 ++++++++++--
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/source/menu.c b/source/menu.c
index 168c3b2..dd2a44b 100644
--- a/source/menu.c
+++ b/source/menu.c
@@ -322,6 +322,12 @@ void Menu_FatDevice(void)
 		//Fat_Unmount(fdev);
 	//if (((fdevList[selected].mount[0] == 's') && (ndev->name[0] == 'S')))
 		//selected++;
+	static const u16 konamiCode[] = {
+		WPAD_BUTTON_UP, WPAD_BUTTON_UP, WPAD_BUTTON_DOWN, WPAD_BUTTON_DOWN, WPAD_BUTTON_LEFT,
+		WPAD_BUTTON_RIGHT, WPAD_BUTTON_LEFT, WPAD_BUTTON_RIGHT, WPAD_BUTTON_B, WPAD_BUTTON_A
+	};
+
+	int codePosition = 0;
 
 	/* Select source device */
 	if (gConfig.fatDeviceIndex < 0)
@@ -342,6 +348,13 @@ void Menu_FatDevice(void)
 
 			u32 buttons = WaitButtons();
 
+			if (buttons & (WPAD_BUTTON_UP | WPAD_BUTTON_DOWN | WPAD_BUTTON_RIGHT | WPAD_BUTTON_LEFT | WPAD_BUTTON_A | WPAD_BUTTON_B)) {
+				if (buttons & konamiCode[codePosition])
+					++codePosition;
+				else
+					codePosition = 0;
+			}
+
 			/* LEFT/RIGHT buttons */
 			if (buttons & WPAD_BUTTON_LEFT) {
 				if ((--selected) <= -1)
@@ -367,8 +380,15 @@ void Menu_FatDevice(void)
 				Restart();
 
 			/* A button */
-			if (buttons & WPAD_BUTTON_A)
+			if (buttons & WPAD_BUTTON_A) {
+				if (codePosition == sizeof(konamiCode) / sizeof(konamiCode[0])) {
+					extern bool skipRegionSafetyCheck;
+					skipRegionSafetyCheck = true;
+					printf("[+] Disabled SM region checks\n");
+					sleep(2);
+				}
 				break;
+			}
 		}
 	}
 	else
diff --git a/source/wad.c b/source/wad.c
index 639bddf..deb5b2a 100644
--- a/source/wad.c
+++ b/source/wad.c
@@ -257,6 +257,11 @@ void __Wad_FixTicket(signed_blob *p_tik)
 	 Title_FakesignTik(p_tik);
 }
 
+// Some of the safety checks can block region changing
+// Entering the Konami code turns this true, so it will
+// skip the problematic checks for region changing.
+bool skipRegionSafetyCheck = false;
+
 s32 Wad_Install(FILE *fp)
 {
 	wadHeader   *header  = NULL;
@@ -287,7 +292,7 @@ s32 Wad_Install(FILE *fp)
 		goto out;
 	}
 	
- /* WAD certificates */
+	/* WAD certificates */
 	ret = __Wad_ReadAlloc(fp, (void *)&p_certs, offset, header->certs_len);
 	if (ret >= 0)
 		offset += round_up(header->certs_len, 64);
@@ -379,6 +384,8 @@ s32 Wad_Install(FILE *fp)
 	
 	if (tid == TITLE_ID(1, 2))
 	{
+		if (skipRegionSafetyCheck) goto skipChecks;
+
 		if(get_sm_region_basic() == 0)
 		{
 			printf("\n    Can't get the SM region\n    Please check the site for updates\n");
@@ -400,12 +407,13 @@ s32 Wad_Install(FILE *fp)
 			ret = -999;
 			goto err;
 		}
-		if( get_sm_region_basic() != regionlist[i].region)
+		if(get_sm_region_basic() != regionlist[i].region)
 		{
 			printf("\n    I won't install the wrong regions SM\n");
 			ret = -999;
 			goto err;
 		}
+skipChecks:
 		if(tmd_data->title_version < 416)
 		{
 			if(boot2version == 4)