Implement tpmc getversion command.stabilize-9756.B

This command exposes the vendor and TPM firmware version.

BRANCH=none
BUG=chromium:728130
TEST=Builds and tpmc getversion prints plausible results.

Change-Id: Iec556a298e025e10bda00121b40a25d8dc3839d1
Reviewed-on: https://chromium-review.googlesource.com/565287
Commit-Ready: Mattias Nissler <mnissler@chromium.org>
Tested-by: Mattias Nissler <mnissler@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Andrey Pronin <apronin@chromium.org>

2 files changed, 30 insertions, 0 deletions

diff --git a/utility/tlcl_generator.c b/utility/tlcl_generator.c
index 7ed1d6c3..70ce5fd9 100644
--- a/utility/tlcl_generator.c
+++ b/utility/tlcl_generator.c
@@ -389,6 +389,21 @@ Command* BuildGetRandomCommand(void) {
   return cmd;
 }
 
+Command* BuildGetVersionValCommand(void) {
+  int size = (kTpmRequestHeaderLength +
+              sizeof(TPM_CAPABILITY_AREA) +   /* capArea */
+              sizeof(uint32_t));              /* subCapSize */
+
+  Command* cmd = newCommand(TPM_ORD_GetCapability, size);
+  cmd->name = "tpm_getversionval_cmd";
+  AddInitializedField(cmd, kTpmRequestHeaderLength,
+                      sizeof(TPM_CAPABILITY_AREA), TPM_CAP_GET_VERSION_VAL);
+  AddInitializedField(cmd, kTpmRequestHeaderLength +
+                      sizeof(TPM_CAPABILITY_AREA),
+                      sizeof(uint32_t), 0);
+  return cmd;
+}
+
 /* Output the fields of a structure.
  */
 void OutputFields(Field* fld) {
@@ -510,6 +525,7 @@ Command* (*builders[])(void) = {
   BuildGetOwnershipCommand,
   BuildGetRandomCommand,
   BuildExtendCommand,
+  BuildGetVersionValCommand,
 };
 
 static void FreeFields(Field* fld) {
diff --git a/utility/tpmc.c b/utility/tpmc.c
index 1e4e3026..ae45ca1c 100644
--- a/utility/tpmc.c
+++ b/utility/tpmc.c
@@ -9,6 +9,7 @@
  * for other errors.
  */
 
+#include <inttypes.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -456,6 +457,17 @@ static uint32_t HandlerSendRaw(void) {
   return result;
 }
 
+static uint32_t HandlerGetVersion(void) {
+  uint32_t vendor;
+  uint64_t firmware_version;
+  uint32_t result = TlclGetVersion(&vendor, &firmware_version);
+  if (result == 0) {
+    printf("vendor %08x\nfirmware_version %016" PRIx64 "\n",
+           vendor, firmware_version);
+  }
+  return result;
+}
+
 #ifdef TPM2_MODE
 static uint32_t HandlerDoNothingForTPM2(void) {
   return 0;
@@ -534,6 +546,8 @@ command_record command_table[] = {
   { "savestate", "save", "execute TPM_SaveState", TlclSaveState },
   { "sendraw", "raw", "send a raw request and print raw response",
     HandlerSendRaw },
+  { "getversion", "getver", "get TPM vendor and firmware version",
+    HandlerGetVersion },
 };
 
 static int n_commands = sizeof(command_table) / sizeof(command_table[0]);