Call tpm_seal_trusted() and tpm_unseal_trusted() for TPM 2.0 chips.
Signed-off-by: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com>
Reviewed-by: Andreas Fuchs <andreas.fu...@sit.fraunhofer.de>
---
security/keys/trusted.c | 36 +++++++++++++++++++++++++++++++++---
1 file changed, 33 insertions(+), 3 deletions(-)
diff --git a/security/keys/trusted.c b/security/keys/trusted.c
index c0594cb..d3633cf 100644
--- a/security/keys/trusted.c
+++ b/security/keys/trusted.c
@@ -862,12 +862,19 @@ static int datablob_parse(char *datablob, struct
trusted_key_payload *p,
static struct trusted_key_options *trusted_options_alloc(void)
{
struct trusted_key_options *options;
+ int tpm2;
+
+ tpm2 = tpm_is_tpm2(TPM_ANY_NUM);
+ if (tpm2 < 0)
+ return NULL;
options = kzalloc(sizeof *options, GFP_KERNEL);
if (options) {
/* set any non-zero defaults */
options->keytype = SRK_keytype;
- options->keyhandle = SRKHANDLE;
+
+ if (!tpm2)
+ options->keyhandle = SRKHANDLE;
}
return options;
}
@@ -905,6 +912,11 @@ static int trusted_instantiate(struct key *key,
int ret = 0;
int key_cmd;
size_t key_len;
+ int tpm2;
+
+ tpm2 = tpm_is_tpm2(TPM_ANY_NUM);
+ if (tpm2 < 0)
+ return tpm2;
if (datalen <= 0 || datalen > 32767 || !prep->data)
return -EINVAL;
@@ -932,12 +944,20 @@ static int trusted_instantiate(struct key *key,
goto out;
}
+ if (!options->keyhandle) {
+ ret = -EINVAL;
+ goto out;
+ }
+
dump_payload(payload);
dump_options(options);
switch (key_cmd) {
case Opt_load:
- ret = key_unseal(payload, options);
+ if (tpm2)
+ ret = tpm_unseal_trusted(TPM_ANY_NUM, payload, options);
+ else
+ ret = key_unseal(payload, options);
dump_payload(payload);
dump_options(options);
if (ret < 0)
@@ -950,7 +970,10 @@ static int trusted_instantiate(struct key *key,
pr_info("trusted_key: key_create failed (%d)\n", ret);
goto out;
}
- ret = key_seal(payload, options);
+ if (tpm2)
+ ret = tpm_seal_trusted(TPM_ANY_NUM, payload, options);
+ else
+ ret = key_seal(payload, options);
if (ret < 0)
pr_info("trusted_key: key_seal failed (%d)\n", ret);
break;
@@ -1018,6 +1041,13 @@ static int trusted_update(struct key *key, struct
key_preparsed_payload *prep)
kfree(new_p);
goto out;
}
+
+ if (!new_o->keyhandle) {
+ ret = -EINVAL;
+ kfree(new_p);
+ goto out;
+ }
+
/* copy old key values, and reseal with new pcrs */
new_p->migratable = p->migratable;
new_p->key_len = p->key_len;
--
2.5.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
