In preparation for the patch introducing a function to pass supported TPM
algorithms and digest sizes to TPM users, the crypto algorithm identifier
is added to the active_bank_info structure.
All members of active_bank_info are necessary: TPM algorithm identifiers
will be used to create an event log (they are included in the Crypto Agile
format defined by TCG); crypto identifiers will be used to calculate
digests using the crypto subsystem; digest sizes will be used to truncate
digests calculated with different algorithms.
Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
---
drivers/char/tpm/tpm2-cmd.c | 2 ++
include/linux/tpm.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index b1356be..8c58f6e 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -946,6 +946,7 @@ static int tpm2_init_active_bank_info(struct tpm_chip *chip, u16 alg_id,
int rc, i;
active_bank->alg_id = alg_id;
+ active_bank->crypto_id = HASH_ALGO__LAST;
for (i = 0; i < ARRAY_SIZE(tpm2_hash_map); i++) {
enum hash_algo crypto_algo = tpm2_hash_map[i].crypto_id;
@@ -954,6 +955,7 @@ static int tpm2_init_active_bank_info(struct tpm_chip *chip, u16 alg_id,
continue;
active_bank->digest_size = hash_digest_size[crypto_algo];
+ active_bank->crypto_id = crypto_algo;
return 0;
}
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 3ecce21..fc927f3 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -54,6 +54,7 @@ struct tpm_class_ops {
struct active_bank_info {
u16 alg_id;
+ u16 crypto_id;
u16 digest_size;
};
--
2.9.3
