Add TPM version checking

host/lib/crossystem.c

 /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ skipping 83 matching lines @@
 
 /* Fields that GetVdatString() can get */
 typedef enum VdatStringField {
   VDAT_STRING_TIMERS = 0,          /* Timer values */
   VDAT_STRING_LOAD_FIRMWARE_DEBUG  /* LoadFirmware() debug information */
 } VdatStringField;
 
 
 /* Fields that GetVdatInt() can get */
 typedef enum VdatIntField {
-  VDAT_INT_FLAGS = 0  /* Flags */
+  VDAT_INT_FLAGS = 0,              /* Flags */
+  VDAT_INT_FW_VERSION_TPM,         /* Current firmware version in TPM */
+  VDAT_INT_KERNEL_VERSION_TPM      /* Current kernel version in TPM */
 } VdatIntField;
 
 
 /* Copy up to dest_size-1 characters from src to dest, ensuring null
    termination (which strncpy() doesn't do).  Returns the destination
    string. */
 char* StrCopy(char* dest, const char* src, int dest_size) {
   strncpy(dest, src, dest_size);
   dest[dest_size - 1] = '\0';
   return dest;
@@ skipping 548 matching lines @@
 
   if (!ab)
     return -1;
 
   sh = (VbSharedDataHeader*)ab->buffer;
 
   switch (field) {
     case VDAT_INT_FLAGS:
       value = (int)sh->flags;
       break;
-
+    case VDAT_INT_FW_VERSION_TPM:
+      value = (int)sh->fw_version_tpm;
+      break;
+    case VDAT_INT_KERNEL_VERSION_TPM:
+      value = (int)sh->kernel_version_tpm;
+      break;
   }
 
   Free(ab);
   return value;
 }
 
 
 /* Read a system property integer.
  *
  * Returns the property value, or -1 if error. */
@@ skipping 56 matching lines @@
   }
   /* Other parameters */
   else if (!strcasecmp(name,"recovery_reason")) {
     return VbGetRecoveryReason();
   } else if (!strcasecmp(name,"fmap_base")) {
     value = ReadFileInt(ACPI_FMAP_PATH);
   } else if (!strcasecmp(name,"cros_debug")) {
     value = VbGetCrosDebug();
   } else if (!strcasecmp(name,"vdat_flags")) {
     value = GetVdatInt(VDAT_INT_FLAGS);
+  } else if (!strcasecmp(name,"tpm_fwver")) {
+    value = GetVdatInt(VDAT_INT_FW_VERSION_TPM);
+  } else if (!strcasecmp(name,"tpm_kernver")) {
+    value = GetVdatInt(VDAT_INT_KERNEL_VERSION_TPM);
   }
 
   return value;
 }
 
 /* Read a system property string into a destination buffer of the specified
  * size.
  *
  * Returns the passed buffer, or NULL if error. */
 const char* VbGetSystemPropertyString(const char* name, char* dest, int size) {
@@ skipping 81 matching lines @@
 
 
 /* Set a system property string.
  *
  * Returns 0 if success, -1 if error. */
 int VbSetSystemPropertyString(const char* name, const char* value) {
 
   /* TODO: support setting */
   return -1;
 }