Files
linux/drivers
James Bottomley 6519fea6fd tpm: add hmac checks to tpm2_pcr_extend()
tpm2_pcr_extend() is used by trusted keys to extend a PCR to prevent a
key from being re-loaded until the next reboot.  To use this
functionality securely, that extend must be protected by a session
hmac.  This patch adds HMAC protection so tampering with the
tpm2_pcr_extend() command in flight is detected.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
2024-05-09 22:30:51 +03:00
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