diff options
Diffstat (limited to 'src/security/tpm/tss/tcg-1.2/tss.c')
| -rw-r--r-- | src/security/tpm/tss/tcg-1.2/tss.c | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/src/security/tpm/tss/tcg-1.2/tss.c b/src/security/tpm/tss/tcg-1.2/tss.c index e73db388e8b5..f0d28dfe3f04 100644 --- a/src/security/tpm/tss/tcg-1.2/tss.c +++ b/src/security/tpm/tss/tcg-1.2/tss.c @@ -24,13 +24,22 @@ #include <console/console.h> #define VBDEBUG(format, args...) printk(BIOS_DEBUG, format, ## args) +static tis_sendrecv_fn tis_sendrecv; + static tpm_result_t tpm_send_receive(const uint8_t *request, - uint32_t request_length, - uint8_t *response, - uint32_t *response_length) + uint32_t request_length, + uint8_t *response, + uint32_t *response_length) { size_t len = *response_length; - tpm_result_t rc = tis_sendrecv(request, request_length, response, &len); + tpm_result_t rc; + + if (tis_sendrecv == NULL) { + printk(BIOS_ERR, "Attempted use of uninitialized TSS 1.2 stack\n"); + return TPM_FAIL; + } + + rc = tis_sendrecv(request, request_length, response, &len); if (rc) return rc; /* check 64->32bit overflow and (re)check response buffer overflow */ @@ -142,23 +151,16 @@ static tpm_result_t send(const uint8_t *command) /* Exported functions. */ -static uint8_t tlcl_init_done; - tpm_result_t tlcl_lib_init(void) { - tpm_result_t rc = TPM_SUCCESS; - if (tlcl_init_done) - return rc; - rc = tis_init(); - if (rc) - return rc; - rc = tis_open(); - if (rc) - return rc; + if (tis_sendrecv != NULL) + return TPM_SUCCESS; - tlcl_init_done = 1; + tis_sendrecv = tis_probe(); + if (tis_sendrecv == NULL) + return TPM_CB_NO_DEVICE; - return rc; + return TPM_SUCCESS; } tpm_result_t tlcl_startup(void) |