uint32_t tlcl_self_test_full(void)
{
struct tpm2_self_test st;
struct tpm2_response *response;
st.yes_no = 1;
response = tpm_process_command(TPM2_SelfTest, &st);
printk(BIOS_INFO, "%s: response is %x\n",
__func__, response ? response->hdr.tpm_code : -1);
return TPM_SUCCESS;
}
uint32_t tlcl_force_clear(void)
{
struct tpm2_response *response;
response = tpm_process_command(TPM2_Clear, NULL);
printk(BIOS_INFO, "%s: response is %x\n",
__func__, response ? response->hdr.tpm_code : -1);
if (!response || response->hdr.tpm_code)
return TPM_E_IOERROR;
return TPM_SUCCESS;
}
static uint32_t tlcl_send_startup(TPM_SU type)
{
struct tpm2_startup startup;
struct tpm2_response *response;
startup.startup_type = type;
response = tpm_process_command(TPM2_Startup, &startup);
if (response && response->hdr.tpm_code &&
(response->hdr.tpm_code != TPM_RC_INITIALIZE)) {
printk(BIOS_INFO, "%s: Startup return code is %x\n",
__func__, response->hdr.tpm_code);
return TPM_E_IOERROR;
}
return TPM_SUCCESS;
}
/*
* The caller will provide the digest in a 32 byte buffer, let's consider it a
* sha256 digest.
*/
uint32_t tlcl_extend(int pcr_num, const uint8_t *in_digest,
uint8_t *out_digest)
{
struct tpm2_pcr_extend_cmd pcr_ext_cmd;
struct tpm2_response *response;
pcr_ext_cmd.pcrHandle = HR_PCR + pcr_num;
pcr_ext_cmd.digests.count = 1;
pcr_ext_cmd.digests.digests[0].hashAlg = TPM_ALG_SHA256;
memcpy(pcr_ext_cmd.digests.digests[0].digest.sha256, in_digest,
sizeof(pcr_ext_cmd.digests.digests[0].digest.sha256));
response = tpm_process_command(TPM2_PCR_Extend, &pcr_ext_cmd);
printk(BIOS_INFO, "%s: response is %x\n",
__func__, response ? response->hdr.tpm_code : -1);
if (!response || response->hdr.tpm_code)
return TPM_E_IOERROR;
return TPM_SUCCESS;
}
uint32_t tlcl_read(uint32_t index, void *data, uint32_t length)
{
struct tpm2_nv_read_cmd nv_readc;
struct tpm2_response *response;
memset(&nv_readc, 0, sizeof(nv_readc));
nv_readc.nvIndex = HR_NV_INDEX + index;
nv_readc.size = length;
response = tpm_process_command(TPM2_NV_Read, &nv_readc);
/* Need to map tpm error codes into internal values. */
if (!response)
return TPM_E_READ_FAILURE;
printk(BIOS_INFO, "%s:%d index %#x return code %x\n",
__FILE__, __LINE__, index, response->hdr.tpm_code);
switch (response->hdr.tpm_code) {
case 0:
break;
case 0x28b:
return TPM_E_BADINDEX;
default:
return TPM_E_READ_FAILURE;
}
if (length > response->nvr.buffer.t.size)
return TPM_E_RESPONSE_TOO_LARGE;
if (length < response->nvr.buffer.t.size)
return TPM_E_READ_EMPTY;
memcpy(data, response->nvr.buffer.t.buffer, length);
return TPM_SUCCESS;
}
uint32_t tlcl_lock_nv_write(uint32_t index)
{
struct tpm2_response *response;
/* TPM Wll reject attempts to write at non-defined index. */
struct tpm2_nv_write_lock_cmd nv_wl = {
.nvIndex = HR_NV_INDEX + index,
};
response = tpm_process_command(TPM2_NV_WriteLock, &nv_wl);
printk(BIOS_INFO, "%s: response is %x\n",
__func__, response ? response->hdr.tpm_code : -1);
if (!response || response->hdr.tpm_code)
return TPM_E_IOERROR;
return TPM_SUCCESS;
}
uint32_t tlcl_startup(void)
{
struct tpm2_startup startup;
struct tpm2_response *response;
startup.startup_type = TPM_SU_CLEAR;
response = tpm_process_command(TPM2_Startup, &startup);
if (response && response->hdr.tpm_code &&
(response->hdr.tpm_code != TPM_RC_INITIALIZE)) {
printk(BIOS_INFO, "startup return code is %x\n",
response->hdr.tpm_code);
return TPM_E_IOERROR;
}
return TPM_SUCCESS;
}
uint32_t tlcl_write(uint32_t index, const void *data, uint32_t length)
{
struct tpm2_nv_write_cmd nv_writec;
struct tpm2_response *response;
memset(&nv_writec, 0, sizeof(nv_writec));
nv_writec.nvIndex = HR_NV_INDEX + index;
nv_writec.data.t.size = length;
nv_writec.data.t.buffer = data;
response = tpm_process_command(TPM2_NV_Write, &nv_writec);
printk(BIOS_INFO, "%s: response is %x\n",
__func__, response ? response->hdr.tpm_code : -1);
/* Need to map tpm error codes into internal values. */
if (!response || response->hdr.tpm_code)
return TPM_E_WRITE_FAILURE;
return TPM_SUCCESS;
}
uint32_t tlcl_define_space(uint32_t space_index, size_t space_size)
{
struct tpm2_nv_define_space_cmd nvds_cmd;
struct tpm2_response *response;
/*
* This policy digest was obtained using TPM2_PolicyPCR selecting only
* PCR_0 with a value of all zeros.
*/
static const uint8_t pcr0_unchanged_policy[] = {
0x09, 0x93, 0x3C, 0xCE, 0xEB, 0xB4, 0x41, 0x11,
0x18, 0x81, 0x1D, 0xD4, 0x47, 0x78, 0x80, 0x08,
0x88, 0x86, 0x62, 0x2D, 0xD7, 0x79, 0x94, 0x46,
0x62, 0x26, 0x68, 0x8E, 0xEE, 0xE6, 0x6A, 0xA1
};
/* Prepare the define space command structure. */
memset(&nvds_cmd, 0, sizeof(nvds_cmd));
nvds_cmd.publicInfo.dataSize = space_size;
nvds_cmd.publicInfo.nvIndex = HR_NV_INDEX + space_index;
nvds_cmd.publicInfo.nameAlg = TPM_ALG_SHA256;
/* Attributes common for all NV ram spaces used by firmware. */
nvds_cmd.publicInfo.attributes.TPMA_NV_PPWRITE = 1;
nvds_cmd.publicInfo.attributes.TPMA_NV_AUTHREAD = 1;
nvds_cmd.publicInfo.attributes.TPMA_NV_PPREAD = 1;
nvds_cmd.publicInfo.attributes.TPMA_NV_PLATFORMCREATE = 1;
nvds_cmd.publicInfo.attributes.TPMA_NV_WRITE_STCLEAR = 1;
nvds_cmd.publicInfo.attributes.TPMA_NV_POLICY_DELETE = 1;
/*
* Use policy digest based on default pcr0 value. This makes sure that
* the space can not be deleted as soon as PCR0 value has been
* extended from default.
*/
nvds_cmd.publicInfo.authPolicy.t.buffer = pcr0_unchanged_policy;
nvds_cmd.publicInfo.authPolicy.t.size = sizeof(pcr0_unchanged_policy);
response = tpm_process_command(TPM2_NV_DefineSpace, &nvds_cmd);
printk(BIOS_INFO, "%s: response is %x\n",
__func__, response ? response->hdr.tpm_code : -1);
if (!response)
return TPM_E_NO_DEVICE;
return response->hdr.tpm_code ? TPM_E_INTERNAL_INCONSISTENCY :
TPM_SUCCESS;
}
