[linux-yocto] [PATCH 7/8] tpm: fix missing migratable flag in sealing functionality for TPM2
jonathan.yong at intel.com
jonathan.yong at intel.com
Mon Jun 13 21:14:09 PDT 2016
From: Jarkko Sakkinen <jarkko.sakkinen at linux.intel.com>
The 'migratable' flag was not added to the key payload. This patch
fixes the problem.
Fixes: 0fe5480303a1 ("keys, trusted: seal/unseal with TPM 2.0 chips")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen at linux.intel.com>
Acked-by: Peter Huewe <PeterHuewe at gmx.de>
(cherry picked from commit 2e31125c241212e2407d61a2d1cbdad0055a30b0)
Signed-off-by: Yong, Jonathan <jonathan.yong at intel.com>
---
drivers/char/tpm/tpm2-cmd.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index bd7039f..c121304 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -443,12 +443,13 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
TPM_DIGEST_SIZE);
/* sensitive */
- tpm_buf_append_u16(&buf, 4 + TPM_DIGEST_SIZE + payload->key_len);
+ tpm_buf_append_u16(&buf, 4 + TPM_DIGEST_SIZE + payload->key_len + 1);
tpm_buf_append_u16(&buf, TPM_DIGEST_SIZE);
tpm_buf_append(&buf, options->blobauth, TPM_DIGEST_SIZE);
- tpm_buf_append_u16(&buf, payload->key_len);
+ tpm_buf_append_u16(&buf, payload->key_len + 1);
tpm_buf_append(&buf, payload->key, payload->key_len);
+ tpm_buf_append_u8(&buf, payload->migratable);
/* public */
tpm_buf_append_u16(&buf, 14);
@@ -573,6 +574,8 @@ static int tpm2_unseal(struct tpm_chip *chip,
u32 blob_handle)
{
struct tpm_buf buf;
+ u16 data_len;
+ u8 *data;
int rc;
rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_UNSEAL);
@@ -591,11 +594,13 @@ static int tpm2_unseal(struct tpm_chip *chip,
rc = -EPERM;
if (!rc) {
- payload->key_len = be16_to_cpup(
+ data_len = be16_to_cpup(
(__be16 *) &buf.data[TPM_HEADER_SIZE + 4]);
+ data = &buf.data[TPM_HEADER_SIZE + 6];
- memcpy(payload->key, &buf.data[TPM_HEADER_SIZE + 6],
- payload->key_len);
+ memcpy(payload->key, data, data_len - 1);
+ payload->key_len = data_len - 1;
+ payload->migratable = data[data_len - 1];
}
tpm_buf_destroy(&buf);
--
2.7.3
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