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tpm: Rename TPM2_OA_TMPL to TPM2_OA_NULL_KEY and make it local

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Rename and document TPM2_OA_TMPL, as originally requested in the patch
set review, but left unaddressed without any appropriate reasoning. The
new name is TPM2_OA_NULL_KEY, has a documentation and is local only to
tpm2-sessions.c.

Link: https://lore.kernel.org/linux-integrity/ddbeb8111f48a8ddb0b8fca248dff6cc9d7079b2.camel@HansenPartnership.com/
Link: https://lore.kernel.org/linux-integrity/CZCKTWU6ZCC9.2UTEQPEVICYHL@suppilovahvero/
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Jarkko Sakkinen 2024-05-28 12:52:21 +03:00
parent f3d7ba9e1b
commit f09fc6cee0
2 changed files with 19 additions and 17 deletions
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21
drivers/char/tpm/tpm2-sessions.c
View file

@ -80,6 +80,9 @@
/* maximum number of names the TPM must remember for authorization */
#define AUTH_MAX_NAMES 3
#define AES_KEY_BYTES AES_KEYSIZE_128
#define AES_KEY_BITS (AES_KEY_BYTES*8)
static int tpm2_create_primary(struct tpm_chip *chip, u32 hierarchy,
u32 *handle, u8 *name);
@ -954,6 +957,20 @@ int tpm2_start_auth_session(struct tpm_chip *chip)
}
EXPORT_SYMBOL(tpm2_start_auth_session);
/*
* A mask containing the object attributes for the kernel held null primary key
* used in HMAC encryption. For more information on specific attributes look up
* to "8.3 TPMA_OBJECT (Object Attributes)".
*/
#define TPM2_OA_NULL_KEY ( \
TPM2_OA_NO_DA | \
TPM2_OA_FIXED_TPM | \
TPM2_OA_FIXED_PARENT | \
TPM2_OA_SENSITIVE_DATA_ORIGIN | \
TPM2_OA_USER_WITH_AUTH | \
TPM2_OA_DECRYPT | \
TPM2_OA_RESTRICTED)
/**
* tpm2_parse_create_primary() - parse the data returned from TPM_CC_CREATE_PRIMARY
*
@ -1018,7 +1035,7 @@ static int tpm2_parse_create_primary(struct tpm_chip *chip, struct tpm_buf *buf,
val = tpm_buf_read_u32(buf, &offset_t);
/* object properties */
if (val != TPM2_OA_TMPL)
if (val != TPM2_OA_NULL_KEY)
return -EINVAL;
/* auth policy (empty) */
@ -1178,7 +1195,7 @@ static int tpm2_create_primary(struct tpm_chip *chip, u32 hierarchy,
tpm_buf_append_u16(&template, TPM_ALG_SHA256);
/* object properties */
tpm_buf_append_u32(&template, TPM2_OA_TMPL);
tpm_buf_append_u32(&template, TPM2_OA_NULL_KEY);
/* sauth policy (empty) */
tpm_buf_append_u16(&template, 0);

15
include/linux/tpm.h
View file

@ -394,21 +394,6 @@ enum tpm2_object_attributes {
TPM2_OA_SIGN = BIT(18),
};
/*
* definitions for the canonical template. These are mandated
* by the TCG key template documents
*/
#define AES_KEY_BYTES AES_KEYSIZE_128
#define AES_KEY_BITS (AES_KEY_BYTES*8)
#define TPM2_OA_TMPL (TPM2_OA_NO_DA | \
TPM2_OA_FIXED_TPM | \
TPM2_OA_FIXED_PARENT | \
TPM2_OA_SENSITIVE_DATA_ORIGIN | \
TPM2_OA_USER_WITH_AUTH | \
TPM2_OA_DECRYPT | \
TPM2_OA_RESTRICTED)
enum tpm2_session_attributes {
TPM2_SA_CONTINUE_SESSION = BIT(0),
TPM2_SA_AUDIT_EXCLUSIVE = BIT(1),