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Windows: Add option to avoid PIM prompt in pre-boot authentication by storing PIM value unencrypted in MBR.

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This commit is contained in:
Mounir IDRASSI
2016-04-20 00:30:28 +02:00
parent bd9105794b
commit 1396269d57
14 changed files with 186 additions and 90 deletions
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5
src/Common/Volumes.c
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@@ -590,6 +590,7 @@ void ComputeBootloaderFingerprint (byte *bootLoaderBuf, unsigned int bootLoaderS
{
// compute Whirlpool+SHA512 fingerprint of bootloader including MBR
// we skip user configuration fields:
// TC_BOOT_SECTOR_PIM_VALUE_OFFSET = 400
// TC_BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_OFFSET = 402
// => TC_BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_SIZE = 4
// TC_BOOT_SECTOR_USER_MESSAGE_OFFSET = 406
@@ -604,8 +605,8 @@ void ComputeBootloaderFingerprint (byte *bootLoaderBuf, unsigned int bootLoaderS
WHIRLPOOL_init (&whirlpool);
sha512_begin (&sha2);
WHIRLPOOL_add (bootLoaderBuf, TC_BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_OFFSET * 8, &whirlpool);
sha512_hash (bootLoaderBuf, TC_BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_OFFSET, &sha2);
WHIRLPOOL_add (bootLoaderBuf, TC_BOOT_SECTOR_PIM_VALUE_OFFSET * 8, &whirlpool);
sha512_hash (bootLoaderBuf, TC_BOOT_SECTOR_PIM_VALUE_OFFSET, &sha2);
WHIRLPOOL_add (bootLoaderBuf + TC_BOOT_SECTOR_USER_MESSAGE_OFFSET + TC_BOOT_SECTOR_USER_MESSAGE_MAX_LENGTH, (TC_BOOT_SECTOR_USER_CONFIG_OFFSET - (TC_BOOT_SECTOR_USER_MESSAGE_OFFSET + TC_BOOT_SECTOR_USER_MESSAGE_MAX_LENGTH)) * 8, &whirlpool);
sha512_hash (bootLoaderBuf + TC_BOOT_SECTOR_USER_MESSAGE_OFFSET + TC_BOOT_SECTOR_USER_MESSAGE_MAX_LENGTH, (TC_BOOT_SECTOR_USER_CONFIG_OFFSET - (TC_BOOT_SECTOR_USER_MESSAGE_OFFSET + TC_BOOT_SECTOR_USER_MESSAGE_MAX_LENGTH)), &sha2);