tpm: add session encryption protection to tpm2_get_random()

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If some entity is snooping the TPM bus, they can see the random
numbers we're extracting from the TPM and do prediction attacks
against their consumers.  Foil this attack by using response
encryption to prevent the attacker from seeing the random sequence.

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>

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James Bottomley 2024-04-29 16:28:07 -04:00 • committed by Jarkko Sakkinen

parent 6519fea6fd

commit 1b6d7f9eb1

1 changed files with 17 additions and 4 deletions

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drivers/char/tpm/tpm2-cmd.c

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