From 1396269d573256248bece97e1e291ef0c08e513f Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Wed, 20 Apr 2016 00:30:28 +0200
Subject: Windows: Add option to avoid PIM prompt in pre-boot authentication by
 storing PIM value unencrypted in MBR.

---
 src/Boot/Windows/BootConfig.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/Boot/Windows/BootConfig.cpp')

diff --git a/src/Boot/Windows/BootConfig.cpp b/src/Boot/Windows/BootConfig.cpp
index 222fcfc4..63ebaf5e 100644
--- a/src/Boot/Windows/BootConfig.cpp
+++ b/src/Boot/Windows/BootConfig.cpp
@@ -32,7 +32,7 @@ Partition EncryptedVirtualPartition;
 Partition ActivePartition;
 Partition PartitionFollowingActive;
 bool ExtraBootPartitionPresent = false;
-uint64 HiddenVolumeStartUnitNo;
+uint64 PimValueOrHiddenVolumeStartUnitNo; // reuse this variable for stored PIM value to reduce memory usage
 uint64 HiddenVolumeStartSector;
 
 #ifndef TC_WINDOWS_BOOT_RESCUE_DISK_MODE
@@ -68,6 +68,14 @@ void ReadBootSectorUserConfiguration ()
 		DisableScreenOutput();
 	}
 
+	if (userConfig & TC_BOOT_USER_CFG_FLAG_DISABLE_PIM)
+	{
+		PimValueOrHiddenVolumeStartUnitNo.LowPart = 0;
+		memcpy (&PimValueOrHiddenVolumeStartUnitNo.LowPart, SectorBuffer + TC_BOOT_SECTOR_PIM_VALUE_OFFSET, TC_BOOT_SECTOR_PIM_VALUE_SIZE);
+	}
+	else
+		PimValueOrHiddenVolumeStartUnitNo.LowPart = -1;
+
 	OuterVolumeBackupHeaderCrc = *(uint32 *) (SectorBuffer + TC_BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_OFFSET);
 
 ret:
-- 
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