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security/tpm/tss/tcg-2.0: Use tlcl_get_hash_size_from_algo() for hash size 

mashal_TPMT_HA() uses size of SHA-256 hash.
Use tlcll_get_hash_size_from_algo() to determince the hash size.

BUG=N/A
TEST=Build binary and verified logging on Facebook FBG-1701

Change-Id: I739260e13e9cd10a61d52e13e8741b12ec868d7f
Signed-off-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33251
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lance Zhao <lance.zhao@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Frans Hendriks 2019-06-28 10:18:22 +02:00 committed by Felix Held
parent 63f73f2a60
commit 7e220cac2d
4 changed files with 57 additions and 6 deletions
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3
src/security/tpm/tss.h
View File

@ -79,6 +79,9 @@ uint32_t tlcl_get_capability(TPM_CAP capability, uint32_t property,
*/
void *tpm_process_command(TPM_CC command, void *command_body);
/* Return digest size of hash algorithm */
uint16_t tlcl_get_hash_size_from_algo(TPMI_ALG_HASH hash_algo);
#endif
/*****************************************************************************/

32
src/security/tpm/tss/tcg-2.0/tss.c
View File

@ -352,6 +352,38 @@ uint32_t tlcl_define_space(uint32_t space_index, size_t space_size,
}
}
uint16_t tlcl_get_hash_size_from_algo(TPMI_ALG_HASH hash_algo)
{
uint16_t value;
switch (hash_algo) {
case TPM_ALG_ERROR:
value = 1;
break;
case TPM_ALG_SHA1:
value = SHA1_DIGEST_SIZE;
break;
case TPM_ALG_SHA256:
value = SHA256_DIGEST_SIZE;
break;
case TPM_ALG_SHA384:
value = SHA384_DIGEST_SIZE;
break;
case TPM_ALG_SHA512:
value = SHA512_DIGEST_SIZE;
break;
case TPM_ALG_SM3_256:
value = SM3_256_DIGEST_SIZE;
break;
default:
printk(BIOS_SPEW, "%s: unknown hash algorithm %d\n", __func__,
hash_algo);
value = 0;
};
return value;
}
uint32_t tlcl_disable_platform_hierarchy(void)
{
struct tpm2_response *response;

2
src/security/tpm/tss/tcg-2.0/tss_marshaling.c
View File

@ -84,7 +84,7 @@ static int marshal_TPMT_HA(struct obuf *ob, TPMT_HA *tpmtha)
rc |= marshal_TPMI_ALG_HASH(ob, tpmtha->hashAlg);
rc |= obuf_write(ob, tpmtha->digest.sha256,
sizeof(tpmtha->digest.sha256));
tlcl_get_hash_size_from_algo(tpmtha->hashAlg));
return rc;
}

16
src/security/tpm/tss/tcg-2.0/tss_structures.h
View File

@ -38,12 +38,28 @@ typedef TPM_HANDLE TPMI_SH_AUTH_SESSION;
typedef TPM_HANDLE TPM_RH;
/* Some hardcoded algorithm values. */
/* Table 7 - TPM_ALG_ID Constants */
#define TPM_ALG_ERROR ((TPM_ALG_ID)0x0000)
#define TPM_ALG_HMAC ((TPM_ALG_ID)0x0005)
#define TPM_ALG_NULL ((TPM_ALG_ID)0x0010)
#define TPM_ALG_SHA1 ((TPM_ALG_ID)0x0004)
#define TPM_ALG_SHA256 ((TPM_ALG_ID)0x000b)
#define TPM_ALG_SHA384 ((TPM_ALG_ID)0x000C)
#define TPM_ALG_SHA512 ((TPM_ALG_ID)0x000D)
#define TPM_ALG_SM3_256 ((TPM_ALG_ID)0x0012)
/* Annex A Algorithm Constants */
/* Table 205 - Defines for SHA1 Hash Values */
#define SHA1_DIGEST_SIZE 20
/* Table 206 - Defines for SHA256 Hash Values */
#define SHA256_DIGEST_SIZE 32
/* Table 207 - Defines for SHA384 Hash Values */
#define SHA384_DIGEST_SIZE 48
/* Table 208 - Defines for SHA512 Hash Values */
#define SHA512_DIGEST_SIZE 64
/* Table 209 - Defines for SM3_256 Hash Values */
#define SM3_256_DIGEST_SIZE 32
/* Some hardcoded hierarchies. */
#define TPM_RH_NULL 0x40000007