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extend: align with Linux upstream extend interface #473

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extend: align with Linux upstream extend interface #473

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11 changes: 6 additions & 5 deletions QuoteGeneration/quote_wrapper/tdx_attest/tdx_attest.c
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Original file line number Diff line number Diff line change
Expand Up @@ -947,7 +947,8 @@ tdx_attest_error_t tdx_att_extend(
{
#ifdef TDX_CMD_EXTEND_RTMR
int devfd = -1;
struct tdx_extend_rtmr_req req;
char tdx_attest_extend_path[128];

if (!p_rtmr_event || p_rtmr_event->version != 1) {
return TDX_ATTEST_ERROR_INVALID_PARAMETER;
}
Expand All @@ -958,17 +959,17 @@ tdx_attest_error_t tdx_att_extend(
return TDX_ATTEST_ERROR_INVALID_PARAMETER;
}

devfd = open(TDX_ATTEST_DEV_PATH, O_RDWR | O_SYNC);
snprintf(tdx_attest_extend_path, 128,
"/sys/devices/virtual/misc/tdx_guest/measurements/rtmr%d:sha384", p_rtmr_event->rtmr_index );
devfd = open(tdx_attest_extend_path, O_WRONLY);
if (-1 == devfd) {
TDX_TRACE;
return TDX_ATTEST_ERROR_DEVICE_FAILURE;
}

static_assert(TDX_EXTEND_RTMR_DATA_LEN == sizeof(p_rtmr_event->extend_data),
"rtmr extend size mismatch!");
req.index = (uint8_t)p_rtmr_event->rtmr_index;
memcpy(req.data, p_rtmr_event->extend_data, TDX_EXTEND_RTMR_DATA_LEN);
if (-1 == ioctl(devfd, TDX_CMD_EXTEND_RTMR, &req)) {
if (TDX_EXTEND_RTMR_DATA_LEN != write(devfd, p_rtmr_event->extend_data, TDX_EXTEND_RTMR_DATA_LEN)) {
TDX_TRACE;
close(devfd);
if (EINVAL == errno) {
Expand Down