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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2024-04-29 23:28:02 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2024-05-09 22:30:51 +0300 |
| commit | 033ee84e5f01c86997cde29947805e9781ddf233 (patch) | |
| tree | fa850da4b75e01f5c1bc20c1478aeb8317bbe20e /drivers/char/tpm/Kconfig | |
| parent | d2add27cf2b823a8c1f8caf7ff10c98070df71f5 (diff) | |
| download | linux-033ee84e5f01c86997cde29947805e9781ddf233.tar.xz | |
tpm: Add TCG mandated Key Derivation Functions (KDFs)
The TCG mandates two Key derivation functions called KDFa and KDFe
used to derive keys from seeds and elliptic curve points respectively.
The definitions for these functions are found in the TPM 2.0 Library
Specification Part 1 - Architecture Guide
https://trustedcomputinggroup.org/resource/tpm-library-specification/
Implement a cut down version of each of these functions sufficient to
support the key derivation needs of HMAC sessions.
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>
Diffstat (limited to 'drivers/char/tpm/Kconfig')
| -rw-r--r-- | drivers/char/tpm/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig index ad37b55f5ff9..c3996786f9bf 100644 --- a/drivers/char/tpm/Kconfig +++ b/drivers/char/tpm/Kconfig @@ -30,6 +30,7 @@ if TCG_TPM config TCG_TPM2_HMAC bool "Use HMAC and encrypted transactions on the TPM bus" default y + select CRYPTO_LIB_SHA256 help Setting this causes us to deploy a scheme which uses request and response HMACs in addition to encryption for |