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/BootEncryptedIo.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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

diff --git a/src/Boot/Windows/BootEncryptedIo.cpp b/src/Boot/Windows/BootEncryptedIo.cpp
index cc44416d..d130534f 100644
--- a/src/Boot/Windows/BootEncryptedIo.cpp
+++ b/src/Boot/Windows/BootEncryptedIo.cpp
@@ -48,7 +48,7 @@ BiosResult ReadEncryptedSectors (uint16 destSegment, uint16 destOffset, byte dri
 	{
 		// Convert sector number to data unit number of the hidden volume
 		sector -= HiddenVolumeStartSector;
-		sector += HiddenVolumeStartUnitNo;
+		sector += PimValueOrHiddenVolumeStartUnitNo;
 	}
 
 	if (drive == EncryptedVirtualPartition.Drive)
@@ -96,7 +96,7 @@ BiosResult WriteEncryptedSectors (uint16 sourceSegment, uint16 sourceOffset, byt
 		writeOffset = HiddenVolumeStartSector;
 		writeOffset -= EncryptedVirtualPartition.StartSector;
 		dataUnitNo -= EncryptedVirtualPartition.StartSector;
-		dataUnitNo += HiddenVolumeStartUnitNo;
+		dataUnitNo += PimValueOrHiddenVolumeStartUnitNo;
 	}
 
 	while (sectorCount-- > 0)
-- 
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