[PATCH V4 13/15] SecurityPkg/FmpAuthenticationLibPkcs7: Add PKCS7 instance for FMP.

[Jiewen Yao <jiewen.yao@intel.com>]

It provides PKCS7 based FMP authentication.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>
---
 SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.c   | 213 ++++++++++++++++++++
 SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.inf |  49 +++++
 SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.uni |  26 +++
 3 files changed, 288 insertions(+)

diff --git a/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.c b/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.c
new file mode 100644
index 0000000..6a05b6b
--- /dev/null
+++ b/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.c
@@ -0,0 +1,213 @@
+/** @file
+  FMP Authentication PKCS7 handler.
+  Provide generic FMP authentication functions for DXE/PEI post memory phase.
+
+  Caution: This module requires additional review when modified.
+  This module will have external input - capsule image.
+  This external input must be validated carefully to avoid security issue like
+  buffer overflow, integer overflow.
+
+  FmpAuthenticatedHandlerPkcs7(), AuthenticateFmpImage() will receive
+  untrusted input and do basic validation.
+
+  Copyright (c) 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
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Uefi.h>
+
+#include <Guid/SystemResourceTable.h>
+#include <Guid/FirmwareContentsSigned.h>
+#include <Guid/WinCertificate.h>
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/BaseCryptLib.h>
+#include <Library/FmpAuthenticationLib.h>
+#include <Library/PcdLib.h>
+#include <Protocol/FirmwareManagement.h>
+#include <Guid/SystemResourceTable.h>
+
+/**
+  The handler is used to do the authentication for FMP capsule based upon
+  EFI_FIRMWARE_IMAGE_AUTHENTICATION.
+
+  Caution: This function may receive untrusted input.
+
+  This function assumes the caller AuthenticateFmpImage()
+  already did basic validation for EFI_FIRMWARE_IMAGE_AUTHENTICATION.
+
+  @param[in]  Image                   Points to an FMP authentication image, started from EFI_FIRMWARE_IMAGE_AUTHENTICATION.
+  @param[in]  ImageSize               Size of the authentication image in bytes.
+  @param[in]  PublicKeyData           The public key data used to validate the signature.
+  @param[in]  PublicKeyDataLength     The length of the public key data.
+
+  @retval RETURN_SUCCESS            Authentication pass.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_SUCCESS.
+  @retval RETURN_SECURITY_VIOLATION Authentication fail.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_AUTH_ERROR.
+  @retval RETURN_INVALID_PARAMETER  The image is in an invalid format.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_INVALID_FORMAT.
+  @retval RETURN_OUT_OF_RESOURCES   No Authentication handler associated with CertType.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_INSUFFICIENT_RESOURCES.
+**/
+RETURN_STATUS
+FmpAuthenticatedHandlerPkcs7 (
+  IN EFI_FIRMWARE_IMAGE_AUTHENTICATION *Image,
+  IN UINTN                             ImageSize,
+  IN CONST UINT8                       *PublicKeyData,
+  IN UINTN                             PublicKeyDataLength
+  )
+{
+  RETURN_STATUS                             Status;
+  BOOLEAN                                   CryptoStatus;
+  VOID                                      *P7Data;
+  UINTN                                     P7Length;
+  VOID                                      *TempBuffer;
+
+  DEBUG((DEBUG_INFO, "FmpAuthenticatedHandlerPkcs7 - Image: 0x%08x - 0x%08x\n", (UINTN)Image, (UINTN)ImageSize));
+
+  P7Length = Image->AuthInfo.Hdr.dwLength - (OFFSET_OF(WIN_CERTIFICATE_UEFI_GUID, CertData));
+  P7Data = Image->AuthInfo.CertData;
+
+  // It is a signature across the variable data and the Monotonic Count value.
+  TempBuffer = AllocatePool(ImageSize - Image->AuthInfo.Hdr.dwLength);
+  if (TempBuffer == NULL) {
+    DEBUG((DEBUG_ERROR, "FmpAuthenticatedHandlerPkcs7: TempBuffer == NULL\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  CopyMem(
+    TempBuffer,
+    (UINT8 *)Image + sizeof(Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength,
+    ImageSize - sizeof(Image->MonotonicCount) - Image->AuthInfo.Hdr.dwLength
+    );
+  CopyMem(
+    (UINT8 *)TempBuffer + ImageSize - sizeof(Image->MonotonicCount) - Image->AuthInfo.Hdr.dwLength,
+    &Image->MonotonicCount,
+    sizeof(Image->MonotonicCount)
+    );
+  CryptoStatus = Pkcs7Verify(
+                   P7Data,
+                   P7Length,
+                   PublicKeyData,
+                   PublicKeyDataLength,
+                   (UINT8 *)TempBuffer,
+                   ImageSize - Image->AuthInfo.Hdr.dwLength
+                   );
+  FreePool(TempBuffer);
+  if (!CryptoStatus) {
+    //
+    // If PKCS7 signature verification fails, AUTH tested failed bit is set.
+    //
+    DEBUG((DEBUG_ERROR, "FmpAuthenticatedHandlerPkcs7: Pkcs7Verify() failed\n"));
+    Status = RETURN_SECURITY_VIOLATION;
+    goto Done;
+  }
+  DEBUG((DEBUG_INFO, "FmpAuthenticatedHandlerPkcs7: PASS verification\n"));
+
+  Status = RETURN_SUCCESS;
+
+Done:
+  return Status;
+}
+
+/**
+  The fucntion is used to do the authentication for FMP capsule based upon
+  EFI_FIRMWARE_IMAGE_AUTHENTICATION.
+
+  The caller may convert the RETURN_STATUS to ESRT/FMP LastAttemptStatus.
+
+  Caution: This function may receive untrusted input.
+
+  @param[in]  Image                   Points to an FMP authentication image, started from EFI_FIRMWARE_IMAGE_AUTHENTICATION.
+  @param[in]  ImageSize               Size of the authentication image in bytes.
+  @param[in]  PublicKeyData           The public key data used to validate the signature.
+  @param[in]  PublicKeyDataLength     The length of the public key data.
+
+  @retval RETURN_SUCCESS            Authentication pass.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_SUCCESS.
+  @retval RETURN_SECURITY_VIOLATION Authentication fail.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_AUTH_ERROR.
+  @retval RETURN_INVALID_PARAMETER  The image is in an invalid format.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_INVALID_FORMAT.
+  @retval RETURN_UNSUPPORTED        No Authentication handler associated with CertType.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_INVALID_FORMAT.
+  @retval RETURN_UNSUPPORTED        Image or ImageSize is invalid.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_INVALID_FORMAT.
+  @retval RETURN_OUT_OF_RESOURCES   No Authentication handler associated with CertType.
+                                    The LastAttemptStatus should be LAST_ATTEMPT_STATUS_ERROR_INSUFFICIENT_RESOURCES.
+**/
+RETURN_STATUS
+EFIAPI
+AuthenticateFmpImage (
+  IN EFI_FIRMWARE_IMAGE_AUTHENTICATION *Image,
+  IN UINTN                             ImageSize,
+  IN CONST UINT8                       *PublicKeyData,
+  IN UINTN                             PublicKeyDataLength
+  )
+{
+  GUID                                      *CertType;
+  EFI_STATUS                                Status;
+
+  if ((Image == NULL) || (ImageSize == 0)) {
+    return RETURN_UNSUPPORTED;
+  }
+
+  if (ImageSize < sizeof(EFI_FIRMWARE_IMAGE_AUTHENTICATION)) {
+    DEBUG((DEBUG_ERROR, "AuthenticateFmpImage - ImageSize too small\n"));
+    return RETURN_INVALID_PARAMETER;
+  }
+  if (Image->AuthInfo.Hdr.dwLength <= OFFSET_OF(WIN_CERTIFICATE_UEFI_GUID, CertData)) {
+    DEBUG((DEBUG_ERROR, "AuthenticateFmpImage - dwLength too small\n"));
+    return RETURN_INVALID_PARAMETER;
+  }
+  if (Image->AuthInfo.Hdr.dwLength > MAX_UINTN - sizeof(UINT64)) {
+    DEBUG((DEBUG_ERROR, "AuthenticateFmpImage - dwLength too big\n"));
+    return RETURN_INVALID_PARAMETER;
+  }
+  if (ImageSize <= sizeof(Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength) {
+    DEBUG((DEBUG_ERROR, "AuthenticateFmpImage - ImageSize too small\n"));
+    return RETURN_INVALID_PARAMETER;
+  }
+  if (Image->AuthInfo.Hdr.wRevision != 0x0200) {
+    DEBUG((DEBUG_ERROR, "AuthenticateFmpImage - wRevision: 0x%02x, expect - 0x%02x\n", (UINTN)Image->AuthInfo.Hdr.wRevision, (UINTN)0x0200));
+    return RETURN_INVALID_PARAMETER;
+  }
+  if (Image->AuthInfo.Hdr.wCertificateType != WIN_CERT_TYPE_EFI_GUID) {
+    DEBUG((DEBUG_ERROR, "AuthenticateFmpImage - wCertificateType: 0x%02x, expect - 0x%02x\n", (UINTN)Image->AuthInfo.Hdr.wCertificateType, (UINTN)WIN_CERT_TYPE_EFI_GUID));
+    return RETURN_INVALID_PARAMETER;
+  }
+
+  CertType = &Image->AuthInfo.CertType;
+  DEBUG((DEBUG_INFO, "AuthenticateFmpImage - CertType: %g\n", CertType));
+
+  if (CompareGuid (&gEfiCertPkcs7Guid, CertType)) {
+    //
+    // Call the match handler to extract raw data for the input section data.
+    //
+    Status = FmpAuthenticatedHandlerPkcs7 (
+               Image,
+               ImageSize,
+               PublicKeyData,
+               PublicKeyDataLength
+               );
+    return Status;
+  }
+
+  //
+  // Not found, the input guided section is not supported.
+  //
+  return RETURN_UNSUPPORTED;
+}
+
diff --git a/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.inf b/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.inf
new file mode 100644
index 0000000..ac263bf
--- /dev/null
+++ b/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.inf
@@ -0,0 +1,49 @@
+## @file
+#  FMP Authentication PKCS7 handler.
+#
+# Instance of FmpAuthentication Library for DXE/PEI post memory phase.
+#
+#  Copyright (c) 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
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = FmpAuthenticationLibPkcs7
+  MODULE_UNI_FILE                = FmpAuthenticationLibPkcs7.uni
+  FILE_GUID                      = F4EA205B-7345-452C-9D62-53BA6F3B8910
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = FmpAuthenticationLib
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  FmpAuthenticationLibPkcs7.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  SecurityPkg/SecurityPkg.dec
+  CryptoPkg/CryptoPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  MemoryAllocationLib
+  BaseCryptLib
+
+[Guids]
+  gEfiCertPkcs7Guid
diff --git a/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.uni b/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.uni
new file mode 100644
index 0000000..d327e53
--- /dev/null
+++ b/SecurityPkg/Library/FmpAuthenticationLibPkcs7/FmpAuthenticationLibPkcs7.uni
@@ -0,0 +1,26 @@
+// /** @file
+// FMP Authentication PKCS7 handler.
+//
+// This library provide FMP Authentication PKCS7 handler to verify EFI_FIRMWARE_IMAGE_AUTHENTICATION.
+//
+// Caution: This module requires additional review when modified.
+// This library will have external input - capsule image.
+// This external input must be validated carefully to avoid security issues such as
+// buffer overflow or integer overflow.
+//
+// Copyright (c) 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
+// http://opensource.org/licenses/bsd-license.php
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "FMP Authentication PKCS7 handler."
+
+#string STR_MODULE_DESCRIPTION          #language en-US "This library provide FMP Authentication PKCS7 handler to verify EFI_FIRMWARE_IMAGE_AUTHENTICATION."
+
-- 
2.7.4.windows.1