Proxmox-Port/libtpms
1
0
Fork 0
mirror of https://github.com/stefanberger/libtpms synced 2026-08-11 19:26:27 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Sync: Fix masking-out of unneeded bits in TpmMath_GetRandomBits

Browse Source 
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
This commit is contained in:
Stefan Berger 2025-08-14 18:12:33 -04:00
parent e91b1dd595
commit e9b2c0513e
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/tpm2/TPMCmd/tpm/src/crypt/math/TpmMath_Util.c
View File

@ -105,9 +105,9 @@ LIB_EXPORT BOOL TpmMath_GetRandomBits(BYTE* pBuffer, size_t bits, RAND_STATE* ra
// 2 0x03 6 = (8 - 2) % 8
// ... etc ...
// 7 0x7F 1 = (8 - 7) % 8
int excessBits = bits % 8;
static const BYTE mask[8] = {0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f}; // libtpms changed: fix
pBuffer[0] &= mask[excessBits]; // libtpms changed: fix
static const BYTE mask[8] = {0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f};
int excessBits = bits % 8;
pBuffer[0] = pBuffer[0] & mask[excessBits];
return TRUE;
}
return FALSE;