diff options
Diffstat (limited to 'firmware/lib/tpm2_lite/tlcl.c')
| -rw-r--r-- | firmware/lib/tpm2_lite/tlcl.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/firmware/lib/tpm2_lite/tlcl.c b/firmware/lib/tpm2_lite/tlcl.c index e4f3b53b..84929cfa 100644 --- a/firmware/lib/tpm2_lite/tlcl.c +++ b/firmware/lib/tpm2_lite/tlcl.c @@ -244,13 +244,37 @@ uint32_t TlclExtend(int pcr_num, const uint8_t *in_digest, uint8_t *out_digest) return TPM_SUCCESS; } + +static uint32_t tlcl_nv_read_public(uint32_t index, + struct nv_read_public_response **presp) +{ + struct tpm2_response *response; + struct tpm2_nv_read_public_cmd read_pub; + + memset(&read_pub, 0, sizeof(read_pub)); + read_pub.nvIndex = HR_NV_INDEX + index; + + response = tpm_process_command(TPM2_NV_ReadPublic, &read_pub); + if (!response || response->hdr.tpm_code) + return TPM_E_IOERROR; + *presp = &response->nv_read_public; + + return TPM_SUCCESS; +} + /** * Get the permission bits for the NVRAM space with |index|. */ uint32_t TlclGetPermissions(uint32_t index, uint32_t *permissions) { - *permissions = 0; - VBDEBUG(("%s called, NOT YET IMPLEMENTED\n", __func__)); + uint32_t rv; + struct nv_read_public_response *resp; + + rv = tlcl_nv_read_public(index, &resp); + if (rv != TPM_SUCCESS) + return rv; + + *permissions = resp->nvPublic.attributes; return TPM_SUCCESS; } |