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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-04-20 00:30:28 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-04-20 00:48:20 +0200 |
| commit | 1396269d573256248bece97e1e291ef0c08e513f (patch) | |
| tree | e43c8e0a26d2d6ce0b84caa5200df585ab4d9a72 /src/Boot/Windows/BootMain.cpp | |
| parent | bd9105794b1103e814e983e15e35ce139e6c2371 (diff) | |
| download | VeraCrypt-1396269d573256248bece97e1e291ef0c08e513f.tar.gz VeraCrypt-1396269d573256248bece97e1e291ef0c08e513f.zip | |
Windows: Add option to avoid PIM prompt in pre-boot authentication by storing PIM value unencrypted in MBR.
Diffstat (limited to 'src/Boot/Windows/BootMain.cpp')
| -rw-r--r-- | src/Boot/Windows/BootMain.cpp | 120 |
1 files changed, 66 insertions, 54 deletions
diff --git a/src/Boot/Windows/BootMain.cpp b/src/Boot/Windows/BootMain.cpp index abab2038..275c5762 100644 --- a/src/Boot/Windows/BootMain.cpp +++ b/src/Boot/Windows/BootMain.cpp @@ -231,71 +231,83 @@ static byte AskPassword (Password &password, int& pim) PrintCharAtCursor (asciiCode);
}
- pos = 0;
- Print ("PIM: ");
-
- while (true)
+#ifndef TC_WINDOWS_BOOT_RESCUE_DISK_MODE
+ if (PimValueOrHiddenVolumeStartUnitNo.LowPart != -1)
{
- asciiCode = GetKeyboardChar (&scanCode);
+ pim = (int) PimValueOrHiddenVolumeStartUnitNo.LowPart;
+ // reset stored PIM value to allow requesting PIM next time in case the stored value is wrong
+ PimValueOrHiddenVolumeStartUnitNo.LowPart = -1;
+ return TC_BIOS_KEY_ENTER;
+ }
+ else
+#endif
+ {
+ pos = 0;
+ Print ("PIM: ");
- switch (scanCode)
+ while (true)
{
- case TC_BIOS_KEY_ENTER:
- Print ("\rPIM: ");
- pos =0;
- while (pos < MAX_PIM)
+ asciiCode = GetKeyboardChar (&scanCode);
+
+ switch (scanCode)
{
- PrintChar ('*');
- pos++;
- }
+ case TC_BIOS_KEY_ENTER:
+ Print ("\rPIM: ");
+ pos =0;
+ while (pos < MAX_PIM)
+ {
+ PrintChar ('*');
+ pos++;
+ }
- ClearBiosKeystrokeBuffer();
- PrintEndl();
-
- return TC_BIOS_KEY_ENTER;
+ ClearBiosKeystrokeBuffer();
+ PrintEndl();
+
+ return TC_BIOS_KEY_ENTER;
- case TC_BIOS_KEY_BACKSPACE:
- if (pos > 0)
- {
- if (pos < MAX_PIM)
- PrintBackspace();
- else
- PrintCharAtCursor (' ');
+ case TC_BIOS_KEY_BACKSPACE:
+ if (pos > 0)
+ {
+ if (pos < MAX_PIM)
+ PrintBackspace();
+ else
+ PrintCharAtCursor (' ');
- --pos;
- pim /= 10;
- }
- continue;
+ --pos;
+ pim /= 10;
+ }
+ continue;
- case TC_BIOS_KEY_F5:
- hidePassword ^= 0x01;
- continue;
+ case TC_BIOS_KEY_F5:
+ hidePassword ^= 0x01;
+ continue;
- default:
- if (scanCode == TC_BIOS_KEY_ESC || IsMenuKey (scanCode))
- {
- burn (password.Text, sizeof (password.Text));
- ClearBiosKeystrokeBuffer();
+ default:
+ if (scanCode == TC_BIOS_KEY_ESC || IsMenuKey (scanCode))
+ {
+ burn (password.Text, sizeof (password.Text));
+ ClearBiosKeystrokeBuffer();
- PrintEndl();
- return scanCode;
+ PrintEndl();
+ return scanCode;
+ }
}
- }
- if (!IsDigit (asciiCode) || pos == MAX_PIM)
- {
- Beep();
- continue;
- }
+ if (!IsDigit (asciiCode) || pos == MAX_PIM)
+ {
+ Beep();
+ continue;
+ }
- pim = 10*pim + (asciiCode - '0');
- pos++;
-
- if (hidePassword) asciiCode = '*';
- if (pos < MAX_PIM)
- PrintChar (asciiCode);
- else
- PrintCharAtCursor (asciiCode);
+ pim = 10*pim + (asciiCode - '0');
+ pos++;
+
+ if (hidePassword) asciiCode = '*';
+ if (pos < MAX_PIM)
+ PrintChar (asciiCode);
+ else
+ PrintCharAtCursor (asciiCode);
+ }
}
}
@@ -468,7 +480,7 @@ static bool MountVolume (byte drive, byte &exitKey, bool skipNormal, bool skipHi EncryptedVirtualPartition.StartSector = BootCryptoInfo->EncryptedAreaStart >> TC_LB_SIZE_BIT_SHIFT_DIVISOR;
- HiddenVolumeStartUnitNo = EncryptedVirtualPartition.StartSector;
+ PimValueOrHiddenVolumeStartUnitNo = EncryptedVirtualPartition.StartSector;
HiddenVolumeStartSector = PartitionFollowingActive.StartSector;
HiddenVolumeStartSector += EncryptedVirtualPartition.StartSector;
@@ -749,7 +761,7 @@ static bool CopySystemPartitionToHiddenVolume (byte drive, byte &exitKey) {
CopyMemory (TC_BOOT_LOADER_BUFFER_SEGMENT, i * TC_LB_SIZE, SectorBuffer, TC_LB_SIZE);
- uint64 s = HiddenVolumeStartUnitNo + sectorOffset + i;
+ uint64 s = PimValueOrHiddenVolumeStartUnitNo + sectorOffset + i;
EncryptDataUnits (SectorBuffer, &s, 1, BootCryptoInfo);
CopyMemory (SectorBuffer, TC_BOOT_LOADER_BUFFER_SEGMENT, i * TC_LB_SIZE, TC_LB_SIZE);
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