commit baacb98b3031ebcbd81a788bf5bf054c69353320
author Zentaro Kavanagh <zentaro@chromium.org> Tue Feb 20 17:48:39 2018 -0800
committer chrome-bot <chrome-bot@chromium.org> Tue Apr 03 12:50:50 2018 -0700
tree 436a4af0116f638bd088c0a1f08fe071edf77cd9
parent afaaa035ede59ad21e69105de68bd12a32dbd739

update_engine: Add functions for reading/writing TPM values for rollback.

- Adds function to read the minimum allowed kernel key version
  ie. crossystem tpm_kernver
- Adds function to set the maximum kernel key version roll forward
  value. ie. crossystem max_kernel_rollforward
- Future CL will set max_kernel_rollforward to tpm_kerver as a temporary
  measure to preserve the rollback window until server side changes
  are made.

BUG=chromium:814090
TEST=FEATURES=test emerge-samus update_engine
Change-Id: I8d0c7db438cbc892745917ad56ea013e87361898
Reviewed-on: https://chromium-review.googlesource.com/927827
Commit-Ready: Zentaro Kavanagh <zentaro@chromium.org>
Tested-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>

common/mock_hardware.h

diff --git a/common/mock_hardware.h b/common/mock_hardware.h
index 42fa7ba..03ebfdb 100644
--- a/common/mock_hardware.h
+++ b/common/mock_hardware.h
@@ -54,6 +54,12 @@
     ON_CALL(*this, GetECVersion())
       .WillByDefault(testing::Invoke(&fake_,
             &FakeHardware::GetECVersion));
+    ON_CALL(*this, GetMinKernelKeyVersion())
+        .WillByDefault(
+            testing::Invoke(&fake_, &FakeHardware::GetMinKernelKeyVersion));
+    ON_CALL(*this, SetMaxKernelKeyRollforward())
+        .WillByDefault(
+            testing::Invoke(&fake_, &FakeHardware::SetMaxKernelKeyRollforward));
     ON_CALL(*this, GetPowerwashCount())
       .WillByDefault(testing::Invoke(&fake_,
             &FakeHardware::GetPowerwashCount));
@@ -81,6 +87,9 @@
   MOCK_CONST_METHOD0(GetHardwareClass, std::string());
   MOCK_CONST_METHOD0(GetFirmwareVersion, std::string());
   MOCK_CONST_METHOD0(GetECVersion, std::string());
+  MOCK_CONST_METHOD0(GetMinKernelKeyVersion, int());
+  MOCK_CONST_METHOD1(SetMaxKernelKeyRollforward,
+                     bool(int max_kernel_rollforward));
   MOCK_CONST_METHOD0(GetPowerwashCount, int());
   MOCK_CONST_METHOD1(GetNonVolatileDirectory, bool(base::FilePath*));
   MOCK_CONST_METHOD1(GetPowerwashSafeDirectory, bool(base::FilePath*));