diff options
| author | Ilias Apalodimas <ilias.apalodimas@linaro.org> | 2024-06-23 14:48:17 +0300 |
|---|---|---|
| committer | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2024-06-30 13:58:31 +0200 |
| commit | cba3fa90240df783cb040f25833dd420f7f39f16 (patch) | |
| tree | 687a4c521b190db0b526bc7cb2e617b3b667e778 /include | |
| parent | fed9c11c3b58de804059915b33f9e9263ce6ce75 (diff) | |
tpm: Untangle tpm2_get_pcr_info()
This function was used on measured boot to retrieve the number of active
PCR banks and was designed to work with the TCG protocols.
Since we now have the need to retrieve the active PCRs outside the
measured boot context -- e.g use the in the command line, decouple the
function.
Create one that will only adheres to TCG TSS2.0 [0] specification called
tpm2_get_pcr_info() which can be used by the TPM2.0 APIs and a new one that
is called from the measured boot context called tcg2_get_pcr_info()
[0] https://trustedcomputinggroup.org/wp-content/uploads/TSS_Overview_Common_Structures_Version-0.9_Revision-03_Review_030918.pdf
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/tpm-v2.h | 16 | ||||
| -rw-r--r-- | include/tpm_tcg2.h | 13 |
2 files changed, 24 insertions, 5 deletions
diff --git a/include/tpm-v2.h b/include/tpm-v2.h index fc7c58204e5..aedf2c0f4f5 100644 --- a/include/tpm-v2.h +++ b/include/tpm-v2.h @@ -522,14 +522,11 @@ u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property, * tpm2_get_pcr_info() - get the supported, active PCRs and number of banks * * @dev: TPM device - * @supported_pcr: bitmask with the algorithms supported - * @active_pcr: bitmask with the active algorithms - * @pcr_banks: number of PCR banks + * @pcrs: struct tpml_pcr_selection of available PCRs * * @return 0 on success, code of operation or negative errno on failure */ -int tpm2_get_pcr_info(struct udevice *dev, u32 *supported_pcr, u32 *active_pcr, - u32 *pcr_banks); +int tpm2_get_pcr_info(struct udevice *dev, struct tpml_pcr_selection *pcrs); /** * Issue a TPM2_DictionaryAttackLockReset command. @@ -715,4 +712,13 @@ enum tpm2_algorithms tpm2_name_to_algorithm(const char *name); */ const char *tpm2_algorithm_name(enum tpm2_algorithms); +/** + * tpm2_is_active_pcr() - check the pcr_select. If at least one of the PCRs + * supports the algorithm add it on the active ones + * + * @selection: PCR selection structure + * Return: True if the algorithm is active + */ +bool tpm2_is_active_pcr(struct tpms_pcr_selection *selection); + #endif /* __TPM_V2_H */ diff --git a/include/tpm_tcg2.h b/include/tpm_tcg2.h index 4e4ea1e8067..6519004cc41 100644 --- a/include/tpm_tcg2.h +++ b/include/tpm_tcg2.h @@ -94,6 +94,19 @@ struct tcg_pcr_event { } __packed; /** + * tcg2_get_pcr_info() - get the supported, active PCRs and number of banks + * + * @dev: TPM device + * @supported_pcr: bitmask with the algorithms supported + * @active_pcr: bitmask with the active algorithms + * @pcr_banks: number of PCR banks + * + * @return 0 on success, code of operation or negative errno on failure + */ +int tcg2_get_pcr_info(struct udevice *dev, u32 *supported_pcr, u32 *active_pcr, + u32 *pcr_banks); + +/** * Crypto Agile Log Entry Format * * @pcr_index: PCRIndex event extended to |