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system76-edk2/MdeModulePkg/Universal/Variable/RuntimeDxe/RuntimeDxeUnitTest/VariableLockRequestToLockUnitTest.c
Michael D Kinney dcaa939365 MdeModulePkg/Variable/RuntimeDxe: Add Variable Lock Protocol Unit Tests 
https://bugzilla.tianocore.org/show_bug.cgi?id=3111

Add host based unit tests for the multiple lock case using Variable Lock
Protocol, Variable Policy Protocol, and mixes of Variable Lock Protocol
and Variable Policy Protocol.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Bret Barkelew <Bret.Barkelew@microsoft.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
2020-12-15 06:26:34 +00:00

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/** @file
This is a host-based unit test for the VariableLockRequestToLock shim.
Copyright (c) Microsoft Corporation.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>
#include <Uefi.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UnitTestLib.h>
#include <Library/VariablePolicyLib.h>
#include <Library/VariablePolicyHelperLib.h>
#include <Protocol/VariableLock.h>
#define UNIT_TEST_NAME "VarPol/VarLock Shim Unit Test"
#define UNIT_TEST_VERSION "1.0"
///=== CODE UNDER TEST ===========================================================================
EFI_STATUS
EFIAPI
VariableLockRequestToLock (
IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid
);
///=== TEST DATA ==================================================================================
//
// Test GUID 1 {F955BA2D-4A2C-480C-BFD1-3CC522610592}
//
EFI_GUID mTestGuid1 = {
0xf955ba2d, 0x4a2c, 0x480c, {0xbf, 0xd1, 0x3c, 0xc5, 0x22, 0x61, 0x5, 0x92}
};
//
// Test GUID 2 {2DEA799E-5E73-43B9-870E-C945CE82AF3A}
//
EFI_GUID mTestGuid2 = {
0x2dea799e, 0x5e73, 0x43b9, {0x87, 0xe, 0xc9, 0x45, 0xce, 0x82, 0xaf, 0x3a}
};
//
// Test GUID 3 {698A2BFD-A616-482D-B88C-7100BD6682A9}
//
EFI_GUID mTestGuid3 = {
0x698a2bfd, 0xa616, 0x482d, {0xb8, 0x8c, 0x71, 0x0, 0xbd, 0x66, 0x82, 0xa9}
};
#define TEST_VAR_1_NAME L"TestVar1"
#define TEST_VAR_2_NAME L"TestVar2"
#define TEST_VAR_3_NAME L"TestVar3"
#define TEST_POLICY_ATTRIBUTES_NULL 0
#define TEST_POLICY_MIN_SIZE_NULL 0
#define TEST_POLICY_MAX_SIZE_NULL MAX_UINT32
#define TEST_POLICY_MIN_SIZE_10 10
#define TEST_POLICY_MAX_SIZE_200 200
///=== HELPER FUNCTIONS ===========================================================================
/**
Mocked version of GetVariable, for testing.
@param VariableName
@param VendorGuid
@param Attributes
@param DataSize
@param Data
**/
EFI_STATUS
EFIAPI
StubGetVariableNull (
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
OUT UINT32 *Attributes, OPTIONAL
IN OUT UINTN *DataSize,
OUT VOID *Data OPTIONAL
)
{
UINT32 MockedAttr;
UINTN MockedDataSize;
VOID *MockedData;
EFI_STATUS MockedReturn;
check_expected_ptr (VariableName);
check_expected_ptr (VendorGuid);
check_expected_ptr (DataSize);
MockedAttr = (UINT32)mock();
MockedDataSize = (UINTN)mock();
MockedData = (VOID*)(UINTN)mock();
MockedReturn = (EFI_STATUS)mock();
if (Attributes != NULL) {
*Attributes = MockedAttr;
}
if (Data != NULL && !EFI_ERROR (MockedReturn)) {
CopyMem (Data, MockedData, MockedDataSize);
}
*DataSize = MockedDataSize;
return MockedReturn;
}
//
// Anything you think might be helpful that isn't a test itself.
//
/**
This is a common setup function that will ensure the library is always
initialized with the stubbed GetVariable.
Not used by all test cases, but by most.
@param[in] Context Unit test case context
**/
STATIC
UNIT_TEST_STATUS
EFIAPI
LibInitMocked (
IN UNIT_TEST_CONTEXT Context
)
{
return EFI_ERROR (InitVariablePolicyLib (StubGetVariableNull)) ? UNIT_TEST_ERROR_PREREQUISITE_NOT_MET : UNIT_TEST_PASSED;
}
/**
Common cleanup function to make sure that the library is always de-initialized
prior to the next test case.
@param[in] Context Unit test case context
**/
STATIC
VOID
EFIAPI
LibCleanup (
IN UNIT_TEST_CONTEXT Context
)
{
DeinitVariablePolicyLib();
}
///=== TEST CASES =================================================================================
///===== SHIM SUITE ===========================================================
/**
Test Case that locks a single variable using the Variable Lock Protocol.
The call is expected to succeed.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
LockingWithoutAnyPoliciesShouldSucceed (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_NOT_EFI_ERROR (Status);
return UNIT_TEST_PASSED;
}
/**
Test Case that locks the same variable twice using the Variable Lock Protocol.
Both calls are expected to succeed.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
LockingTwiceShouldSucceed (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_NOT_EFI_ERROR (Status);
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_NOT_EFI_ERROR (Status);
return UNIT_TEST_PASSED;
}
/**
Test Case that locks a variable using the Variable Policy Protocol then locks
the same variable using the Variable Lock Protocol.
Both calls are expected to succeed.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
LockingALockedVariableShouldSucceed (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
VARIABLE_POLICY_ENTRY *NewEntry;
//
// Create a variable policy that locks the variable.
//
Status = CreateBasicVariablePolicy (
&mTestGuid1,
TEST_VAR_1_NAME,
TEST_POLICY_MIN_SIZE_NULL,
TEST_POLICY_MAX_SIZE_200,
TEST_POLICY_ATTRIBUTES_NULL,
TEST_POLICY_ATTRIBUTES_NULL,
VARIABLE_POLICY_TYPE_LOCK_NOW,
&NewEntry
);
UT_ASSERT_NOT_EFI_ERROR (Status);
//
// Register the new policy.
//
Status = RegisterVariablePolicy (NewEntry);
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_NOT_EFI_ERROR (Status);
FreePool (NewEntry);
return UNIT_TEST_PASSED;
}
/**
Test Case that locks a variable using the Variable Policy Protocol with a
policy other than LOCK_NOW then attempts to lock the same variable using the
Variable Lock Protocol. The call to Variable Policy is expected to succeed
and the call to Variable Lock is expected to fail.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
LockingAnUnlockedVariableShouldFail (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
VARIABLE_POLICY_ENTRY *NewEntry;
// Create a variable policy that locks the variable.
Status = CreateVarStateVariablePolicy (&mTestGuid1,
TEST_VAR_1_NAME,
TEST_POLICY_MIN_SIZE_NULL,
TEST_POLICY_MAX_SIZE_200,
TEST_POLICY_ATTRIBUTES_NULL,
TEST_POLICY_ATTRIBUTES_NULL,
&mTestGuid2,
1,
TEST_VAR_2_NAME,
&NewEntry);
UT_ASSERT_NOT_EFI_ERROR (Status);
// Register the new policy.
Status = RegisterVariablePolicy (NewEntry);
// Configure the stub to not care about parameters. We're testing errors.
expect_any_always( StubGetVariableNull, VariableName );
expect_any_always( StubGetVariableNull, VendorGuid );
expect_any_always( StubGetVariableNull, DataSize );
// With a policy, make sure that writes still work, since the variable doesn't exist.
will_return( StubGetVariableNull, TEST_POLICY_ATTRIBUTES_NULL ); // Attributes
will_return( StubGetVariableNull, 0 ); // Size
will_return( StubGetVariableNull, NULL ); // DataPtr
will_return( StubGetVariableNull, EFI_NOT_FOUND); // Status
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_TRUE (EFI_ERROR (Status));
FreePool (NewEntry);
return UNIT_TEST_PASSED;
}
/**
Test Case that locks a variable using the Variable Policy Protocol with a
policy other than LOCK_NOW, but is currently locked. Then attempts to lock
the same variable using the Variable Lock Protocol. The call to Variable
Policy is expected to succeed and the call to Variable Lock also expected to
succeed.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
LockingALockedVariableWithMatchingDataShouldSucceed (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
VARIABLE_POLICY_ENTRY *NewEntry;
UINT8 Data;
// Create a variable policy that locks the variable.
Status = CreateVarStateVariablePolicy (&mTestGuid1,
TEST_VAR_1_NAME,
TEST_POLICY_MIN_SIZE_NULL,
TEST_POLICY_MAX_SIZE_200,
TEST_POLICY_ATTRIBUTES_NULL,
TEST_POLICY_ATTRIBUTES_NULL,
&mTestGuid2,
1,
TEST_VAR_2_NAME,
&NewEntry);
UT_ASSERT_NOT_EFI_ERROR (Status);
// Register the new policy.
Status = RegisterVariablePolicy (NewEntry);
// Configure the stub to not care about parameters. We're testing errors.
expect_any_always( StubGetVariableNull, VariableName );
expect_any_always( StubGetVariableNull, VendorGuid );
expect_any_always( StubGetVariableNull, DataSize );
// With a policy, make sure that writes still work, since the variable doesn't exist.
Data = 1;
will_return( StubGetVariableNull, TEST_POLICY_ATTRIBUTES_NULL ); // Attributes
will_return( StubGetVariableNull, sizeof (Data) ); // Size
will_return( StubGetVariableNull, &Data ); // DataPtr
will_return( StubGetVariableNull, EFI_SUCCESS); // Status
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_TRUE (!EFI_ERROR (Status));
FreePool (NewEntry);
return UNIT_TEST_PASSED;
}
/**
Test Case that locks a variable using the Variable Policy Protocol with a
policy other than LOCK_NOW, but variable data does not match. Then attempts
to lock the same variable using the Variable Lock Protocol. The call to
Variable Policy is expected to succeed and the call to Variable Lock is
expected to fail.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
LockingALockedVariableWithNonMatchingDataShouldFail (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
VARIABLE_POLICY_ENTRY *NewEntry;
UINT8 Data;
// Create a variable policy that locks the variable.
Status = CreateVarStateVariablePolicy (&mTestGuid1,
TEST_VAR_1_NAME,
TEST_POLICY_MIN_SIZE_NULL,
TEST_POLICY_MAX_SIZE_200,
TEST_POLICY_ATTRIBUTES_NULL,
TEST_POLICY_ATTRIBUTES_NULL,
&mTestGuid2,
1,
TEST_VAR_2_NAME,
&NewEntry);
UT_ASSERT_NOT_EFI_ERROR (Status);
// Register the new policy.
Status = RegisterVariablePolicy (NewEntry);
// Configure the stub to not care about parameters. We're testing errors.
expect_any_always( StubGetVariableNull, VariableName );
expect_any_always( StubGetVariableNull, VendorGuid );
expect_any_always( StubGetVariableNull, DataSize );
// With a policy, make sure that writes still work, since the variable doesn't exist.
Data = 2;
will_return( StubGetVariableNull, TEST_POLICY_ATTRIBUTES_NULL ); // Attributes
will_return( StubGetVariableNull, sizeof (Data) ); // Size
will_return( StubGetVariableNull, &Data ); // DataPtr
will_return( StubGetVariableNull, EFI_SUCCESS); // Status
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_TRUE (EFI_ERROR (Status));
FreePool (NewEntry);
return UNIT_TEST_PASSED;
}
/**
Test Case that locks a variable using Variable Lock Protocol Policy Protocol
then and then attempts to lock the same variable using the Variable Policy
Protocol. The call to Variable Lock is expected to succeed and the call to
Variable Policy is expected to fail.
@param[in] Context Unit test case context
**/
UNIT_TEST_STATUS
EFIAPI
SettingPolicyForALockedVariableShouldFail (
IN UNIT_TEST_CONTEXT Context
)
{
EFI_STATUS Status;
VARIABLE_POLICY_ENTRY *NewEntry;
// Lock the variable.
Status = VariableLockRequestToLock (NULL, TEST_VAR_1_NAME, &mTestGuid1);
UT_ASSERT_NOT_EFI_ERROR (Status);
// Create a variable policy that locks the variable.
Status = CreateVarStateVariablePolicy (&mTestGuid1,
TEST_VAR_1_NAME,
TEST_POLICY_MIN_SIZE_NULL,
TEST_POLICY_MAX_SIZE_200,
TEST_POLICY_ATTRIBUTES_NULL,
TEST_POLICY_ATTRIBUTES_NULL,
&mTestGuid2,
1,
TEST_VAR_2_NAME,
&NewEntry);
UT_ASSERT_NOT_EFI_ERROR (Status);
// Register the new policy.
Status = RegisterVariablePolicy (NewEntry);
UT_ASSERT_TRUE (EFI_ERROR (Status));
FreePool (NewEntry);
return UNIT_TEST_PASSED;
}
/**
Main entry point to this unit test application.
Sets up and runs the test suites.
**/
VOID
EFIAPI
UnitTestMain (
VOID
)
{
EFI_STATUS Status;
UNIT_TEST_FRAMEWORK_HANDLE Framework;
UNIT_TEST_SUITE_HANDLE ShimTests;
Framework = NULL;
DEBUG ((DEBUG_INFO, "%a v%a\n", UNIT_TEST_NAME, UNIT_TEST_VERSION));
//
// Start setting up the test framework for running the tests.
//
Status = InitUnitTestFramework (&Framework, UNIT_TEST_NAME, gEfiCallerBaseName, UNIT_TEST_VERSION);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed in InitUnitTestFramework. Status = %r\n", Status));
goto EXIT;
}
//
// Add all test suites and tests.
//
Status = CreateUnitTestSuite (
&ShimTests, Framework,
"Variable Lock Shim Tests", "VarPolicy.VarLockShim", NULL, NULL
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed in CreateUnitTestSuite for ShimTests\n"));
Status = EFI_OUT_OF_RESOURCES;
goto EXIT;
}
AddTestCase (
ShimTests,
"Locking a variable with no matching policies should always work", "EmptyPolicies",
LockingWithoutAnyPoliciesShouldSucceed, LibInitMocked, LibCleanup, NULL
);
AddTestCase (
ShimTests,
"Locking a variable twice should always work", "DoubleLock",
LockingTwiceShouldSucceed, LibInitMocked, LibCleanup, NULL
);
AddTestCase (
ShimTests,
"Locking a variable that's already locked by another policy should work", "LockAfterPolicy",
LockingALockedVariableShouldSucceed, LibInitMocked, LibCleanup, NULL
);
AddTestCase (
ShimTests,
"Locking a variable that already has an unlocked policy should fail", "LockAfterUnlockedPolicy",
LockingAnUnlockedVariableShouldFail, LibInitMocked, LibCleanup, NULL
);
AddTestCase (
ShimTests,
"Locking a variable that already has an locked policy should succeed", "LockAfterLockedPolicyMatchingData",
LockingALockedVariableWithMatchingDataShouldSucceed, LibInitMocked, LibCleanup, NULL
);
AddTestCase (
ShimTests,
"Locking a variable that already has an locked policy with matching data should succeed", "LockAfterLockedPolicyNonMatchingData",
LockingALockedVariableWithNonMatchingDataShouldFail, LibInitMocked, LibCleanup, NULL
);
AddTestCase (
ShimTests,
"Adding a policy for a variable that has previously been locked should always fail", "SetPolicyAfterLock",
SettingPolicyForALockedVariableShouldFail, LibInitMocked, LibCleanup, NULL
);
//
// Execute the tests.
//
Status = RunAllTestSuites (Framework);
EXIT:
if (Framework != NULL) {
FreeUnitTestFramework (Framework);
}
return;
}
///
/// Avoid ECC error for function name that starts with lower case letter
///
#define Main main
/**
Standard POSIX C entry point for host based unit test execution.
@param[in] Argc Number of arguments
@param[in] Argv Array of pointers to arguments
@retval 0 Success
@retval other Error
**/
INT32
Main (
IN INT32 Argc,
IN CHAR8 *Argv[]
)
{
UnitTestMain ();
return 0;
}
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