Re: [PATCH] KEYS: asym_tpm: Switch to get_random_bytes()

[Ken Goldman]

The TPM library specification states that the TPM must comply with NIST 
SP800-90 A.

https://trustedcomputinggroup.org/membership/certification/tpm-certified-products/

shows that the TPMs get third party certification, Common Criteria EAL 4+.

While it's theoretically possible that an attacker could compromise
both the TPM vendors and the evaluation agencies, we do have EAL 4+ 
assurance against both 1 and 2.

On 10/6/2019 8:05 PM, Jarkko Sakkinen wrote:
> Kernel has the random number generator for two reasons:
>
> 1. To protect against bugs in hwrng's.
> 2. To protect against deliberate backdoors in hwrng's.
>
> How TPM RNG is guaranteed to protect against both 1 and 2?