[Description]:

[mirror_edk2.git] / MdeModulePkg / Core / Pei / Security / Security.c

/*++\r
\r
Copyright (c) 2006, Intel Corporation                                                         \r
All rights reserved. This program and the accompanying materials                          \r
are licensed and made available under the terms and conditions of the BSD License         \r
which accompanies this distribution.  The full text of the license may be found at        \r
http://opensource.org/licenses/bsd-license.php                                            \r
                                                                                          \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
Module Name:\r
\r
  Security.c\r
\r
Abstract:\r
\r
  EFI PEI Core Security services\r
\r
--*/\r
\r
#include <PeiMain.h>\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
SecurityPpiNotifyCallback (\r
  IN EFI_PEI_SERVICES           **PeiServices,\r
  IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,\r
  IN VOID                       *Ppi\r
  );\r
\r
static EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {\r
   EFI_PEI_PPI_DESCRIPTOR_NOTIFY_DISPATCH | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,\r
   &gEfiPeiSecurity2PpiGuid,\r
   SecurityPpiNotifyCallback\r
};\r
\r
VOID\r
InitializeSecurityServices (\r
  IN EFI_PEI_SERVICES  **PeiServices,\r
  IN PEI_CORE_INSTANCE *OldCoreData\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Initialize the security services.\r
\r
Arguments:\r
\r
  PeiServices - The PEI core services table.\r
  OldCoreData - Pointer to the old core data.\r
                NULL if being run in non-permament memory mode.\r
Returns:\r
\r
  None\r
\r
--*/\r
{\r
  if (OldCoreData == NULL) {\r
    PeiServicesNotifyPpi (&mNotifyList);\r
  }\r
  return;\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
SecurityPpiNotifyCallback (\r
  IN EFI_PEI_SERVICES           **PeiServices,\r
  IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,\r
  IN VOID                       *Ppi\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Provide a callback for when the security PPI is installed.\r
\r
Arguments:\r
\r
  PeiServices       - The PEI core services table.\r
  NotifyDescriptor  - The descriptor for the notification event.\r
  Ppi               - Pointer to the PPI in question.\r
\r
Returns:\r
\r
  EFI_SUCCESS - The function is successfully processed.\r
\r
--*/\r
{\r
  PEI_CORE_INSTANCE                       *PrivateData;\r
\r
  //\r
  // Get PEI Core private data\r
  //\r
  PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r
  \r
  //\r
  // If there isn't a security PPI installed, use the one from notification\r
  //\r
  if (PrivateData->PrivateSecurityPpi == NULL) {\r
    PrivateData->PrivateSecurityPpi = (EFI_PEI_SECURITY2_PPI *)Ppi;\r
  }\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
VerifyPeim (\r
  IN PEI_CORE_INSTANCE      *PrivateData,\r
  IN EFI_PEI_FV_HANDLE      VolumeHandle,\r
  IN EFI_PEI_FILE_HANDLE    FileHandle\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Provide a callout to the security verification service.\r
\r
Arguments:\r
\r
  PeiServices          - The PEI core services table.\r
  CurrentPeimAddress   - Pointer to the Firmware File under investigation.\r
\r
Returns:\r
\r
  EFI_SUCCESS             - Image is OK\r
  EFI_SECURITY_VIOLATION  - Image is illegal\r
\r
--*/\r
{\r
  EFI_STATUS                      Status;\r
  UINT32                          AuthenticationStatus;\r
  BOOLEAN                         DeferExection;\r
\r
  //\r
  // Set a default authentication state\r
  //\r
  AuthenticationStatus = 0;\r
\r
  if (PrivateData->PrivateSecurityPpi == NULL) {\r
    Status = EFI_NOT_FOUND;\r
  } else {\r
    //\r
    // Check to see if the image is OK\r
    //\r
    Status = PrivateData->PrivateSecurityPpi->AuthenticationState (\r
                                                (CONST EFI_PEI_SERVICES **) &PrivateData->PS,\r
                                                PrivateData->PrivateSecurityPpi,\r
                                                AuthenticationStatus,\r
                                                VolumeHandle,\r
                                                FileHandle,\r
                                                &DeferExection\r
                                                );\r
    if (DeferExection) {\r
      Status = EFI_SECURITY_VIOLATION;\r
    }\r
  }\r
  return Status;\r
}\r
\r
\r
EFI_STATUS\r
VerifyFv (\r
  IN EFI_FIRMWARE_VOLUME_HEADER  *CurrentFvAddress\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Verify a Firmware volume\r
\r
Arguments:\r
\r
  CurrentFvAddress - Pointer to the current Firmware Volume under consideration\r
\r
Returns:\r
\r
  EFI_SUCCESS             - Firmware Volume is legal\r
  EFI_SECURITY_VIOLATION  - Firmware Volume fails integrity test\r
\r
--*/\r
{\r
  //\r
  // Right now just pass the test.  Future can authenticate and/or check the\r
  // FV-header or other metric for goodness of binary.\r
  //\r
  return EFI_SUCCESS;\r
}\r