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SecurityPkg: AuthVariableLib: Add new cert database for volatile time based Auth variable

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Add a new cert data base "certdbv" to store signer certs for volatile time based
Auth variable.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19786 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Chao Zhang
2016-02-02 01:02:31 +00:00
committed by czhang46
parent 378ea6e416
commit 98c2d96105
5 changed files with 146 additions and 58 deletions
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32
SecurityPkg/Library/AuthVariableLib/AuthVariableLib.c
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@@ -11,7 +11,7 @@
may not be modified without authorization. If platform fails to protect these resources,
the authentication service provided in this driver will be broken, and the behavior is undefined.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -98,6 +98,17 @@ VARIABLE_ENTRY_PROPERTY mAuthVarEntry[] = {
MAX_UINTN
}
},
{
&gEfiCertDbGuid,
EFI_CERT_DB_VOLATILE_NAME,
{
VAR_CHECK_VARIABLE_PROPERTY_REVISION,
VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
VARIABLE_ATTRIBUTE_BS_RT_AT,
sizeof (UINT32),
MAX_UINTN
}
},
{
&gEdkiiSecureBootModeGuid,
L"SecureBootMode",
@@ -172,8 +183,9 @@ AuthVariableLibInitialize (
//
// Reserve runtime buffer for certificate database. The size excludes variable header and name size.
// Use EFI_CERT_DB_VOLATILE_NAME size since it is longer.
//
mMaxCertDbSize = (UINT32) (mAuthVarLibContextIn->MaxAuthVariableSize - sizeof (EFI_CERT_DB_NAME));
mMaxCertDbSize = (UINT32) (mAuthVarLibContextIn->MaxAuthVariableSize - sizeof (EFI_CERT_DB_VOLATILE_NAME));
mCertDbStore = AllocateRuntimePool (mMaxCertDbSize);
if (mCertDbStore == NULL) {
return EFI_OUT_OF_RESOURCES;
@@ -288,6 +300,22 @@ AuthVariableLibInitialize (
}
}
//
// Create "certdbv" variable with RT+BS+AT set.
//
VarAttr = EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS;
ListSize = sizeof (UINT32);
Status = AuthServiceInternalUpdateVariable (
EFI_CERT_DB_VOLATILE_NAME,
&gEfiCertDbGuid,
&ListSize,
sizeof (UINT32),
VarAttr
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Check "VendorKeysNv" variable's existence and create "VendorKeys" variable accordingly.
//