From 8051ac7985a2cef1e561fdf1f4258ae640d3735b Mon Sep 17 00:00:00 2001
From: kavsrf <kavsrf@gmail.com>
Date: Sat, 28 Jan 2017 23:24:00 +0300
Subject: DcsDriver config key supported (install/remove dirver)

---
 DcsBoot/DcsBoot.c          | 50 ++++++++++++++++++++++++++++++++++++++++++++++
 DcsBoot/DcsBoot.inf        |  1 +
 Library/CommonLib/EfiVar.c |  6 +++++-
 3 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/DcsBoot/DcsBoot.c b/DcsBoot/DcsBoot.c
index 108da0c..30bc4a9 100644
--- a/DcsBoot/DcsBoot.c
+++ b/DcsBoot/DcsBoot.c
@@ -19,11 +19,15 @@ https://opensource.org/licenses/LGPL-3.0
 #include <Library/BaseMemoryLib.h>
 #include "DcsConfig.h"
 #include <Guid/Gpt.h>
+#include <Guid/GlobalVariable.h>
 
 EFI_GUID          ImagePartGuid;
 EFI_GUID          *gEfiExecPartGuid = &ImagePartGuid;
 CHAR16            *gEfiExecCmdDefault = L"\\EFI\\Microsoft\\Boot\\Bootmgfw.efi";
 CHAR16            *gEfiExecCmd = NULL;
+
+CHAR16* sDcsBootEfi = L"EFI\\VeraCrypt\\DcsBoot.efi";
+CHAR16* sDcsDriverEfiDesc = L"VeraCrypt(DCS) driver";
 /**
 The actual entry point for the application.
 
@@ -46,18 +50,64 @@ DcsBootMain(
 	UINT32              attr;
 	int                 drvInst;
 	BOOLEAN             searchOnESP = FALSE;
+	EFI_INPUT_KEY       key;
+
 	InitBio();
    res = InitFS();
    if (EFI_ERROR(res)) {
       ERR_PRINT(L"InitFS %r\n", res);
    }
+	// Check multiple execution
+	res = EfiGetVar(L"DcsExecPartGuid", NULL, &gEfiExecPartGuid, &len, &attr);
+	if (!EFI_ERROR(res)) {
+		// DcsBoot executed already.
+		ERR_PRINT(L"Multiple execution of DcsBoot\n");
+		MEM_FREE(gEfiExecPartGuid);
+		return EFI_INVALID_PARAMETER;
+	}
 
+	// Driver load selected?
 	drvInst = ConfigReadInt("DcsDriver", 0);
+	if (drvInst) {
+		CHAR16* tmp = NULL;
+		// Driver installed?
+		res = EfiGetVar(L"DriverDC5B", &gEfiGlobalVariableGuid, &tmp, &len, &attr);
+		if (EFI_ERROR(res)) {
+			// No - install and reboot.
+			res = BootMenuItemCreate(L"DriverDC5B", sDcsDriverEfiDesc, gFileRootHandle, sDcsBootEfi, FALSE);
+			if (!EFI_ERROR(res)) {
+				len = 0;
+				res = EfiGetVar(L"DriverOrder", &gEfiGlobalVariableGuid, &tmp, &len, &attr);
+				if (!EFI_ERROR(res)) len = len / 2;
+				res = BootOrderInsert(L"DriverOrder", len, 0x0DC5B);
+				OUT_PRINT(L"DcsBoot driver installed, %r\n", res);
+				key = KeyWait(L"%2d   \r", 10, 0, 0);
+				gST->RuntimeServices->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
+				return res;
+			}
+			ERR_PRINT(L"Failed to install DcsBoot driver. %r\n", res);
+			key = KeyWait(L"%2d   \r", 10, 0, 0);
+		}
+		MEM_FREE(tmp);
+	}	else {
+		CHAR16* tmp = NULL;
+		// Try uninstall driver
+		res = EfiGetVar(L"DriverDC5B", &gEfiGlobalVariableGuid, &tmp, &len, &attr);
+		if (!EFI_ERROR(res)) {
+			BootMenuItemRemove(L"DriverDC5B");
+			BootOrderRemove(L"DriverOrder", 0x0DC5B);
+			OUT_PRINT(L"DcsBoot driver uninstalled\n");
+			key = KeyWait(L"%2d   \r", 10, 0, 0);
+			gST->RuntimeServices->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
+		}
+	}
 
+	// Try platform info
 	if (EFI_ERROR(FileExist(NULL, L"\\EFI\\VeraCrypt\\PlatformInfo")) &&
 		!EFI_ERROR(FileExist(NULL, L"\\EFI\\VeraCrypt\\DcsInfo.dcs"))) {
 		res = EfiExec(NULL, L"\\EFI\\VeraCrypt\\DcsInfo.dcs");
 	}
+
 	// Load all drivers
 	res = EfiExec(NULL, L"\\EFI\\VeraCrypt\\LegacySpeaker.dcs");
 
diff --git a/DcsBoot/DcsBoot.inf b/DcsBoot/DcsBoot.inf
index 34c78f3..745f985 100644
--- a/DcsBoot/DcsBoot.inf
+++ b/DcsBoot/DcsBoot.inf
@@ -48,6 +48,7 @@
   gEfiDcsVariableGuid
   gEfiFileInfoGuid
   gEfiPartTypeSystemPartGuid
+  gEfiGlobalVariableGuid
 
 [Protocols]
   gEfiBlockIoProtocolGuid
diff --git a/Library/CommonLib/EfiVar.c b/Library/CommonLib/EfiVar.c
index 2a6e59e..fad6eb5 100644
--- a/Library/CommonLib/EfiVar.c
+++ b/Library/CommonLib/EfiVar.c
@@ -80,7 +80,11 @@ BootOrderInsert(
 	UINTN     i;
 	UINTN     j;
 	res = EfiGetVar(OrderVarName, &gEfiGlobalVariableGuid, &varBootOrder, &varBootOrderSize, &varBootOrderAttr);
-	if (EFI_ERROR(res)) return res;
+	if (EFI_ERROR(res)) {
+		res = EfiSetVar(OrderVarName, &gEfiGlobalVariableGuid, &value, 2,
+			EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS);
+		return res;
+	}
 	BootOrderCount = varBootOrderSize / sizeof(UINT16);
 	varBootOrderNew = MEM_ALLOC((BootOrderCount + 1) * sizeof(UINT16));
 	if (BootOrderCount < index) index = BootOrderCount - 1;
-- 
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