[PATCH V4 14/15] SecurityPkg/FmpAuthenticationLibRsa2048Sha256: Add RSA2048 instance.

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

It provides Rsa2048Sha256 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/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.c   | 346 ++++++++++++++++++++
 SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.inf |  53 +++
 SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.uni |  26 ++
 3 files changed, 425 insertions(+)

diff --git a/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.c b/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.c
new file mode 100644
index 0000000..79da65f
--- /dev/null
+++ b/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.c
@@ -0,0 +1,346 @@
+/** @file
+  FMP Authentication RSA2048SHA256 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.
+
+  FmpAuthenticatedHandlerRsa2048Sha256(), 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>
+
+///
+/// Public Exponent of RSA Key.
+///
+STATIC CONST UINT8 mRsaE[] = { 0x01, 0x00, 0x01 };
+
+/**
+  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
+FmpAuthenticatedHandlerRsa2048Sha256(
+  IN EFI_FIRMWARE_IMAGE_AUTHENTICATION *Image,
+  IN UINTN                             ImageSize,
+  IN CONST UINT8                       *PublicKeyData,
+  IN UINTN                             PublicKeyDataLength
+  )
+{
+  RETURN_STATUS                             Status;
+  EFI_CERT_BLOCK_RSA_2048_SHA256            *CertBlockRsa2048Sha256;
+  BOOLEAN                                   CryptoStatus;
+  UINT8                                     Digest[SHA256_DIGEST_SIZE];
+  UINT8                                     *PublicKey;
+  UINTN                                     PublicKeyBufferSize;
+  VOID                                      *HashContext;
+  VOID                                      *Rsa;
+
+  DEBUG ((DEBUG_INFO, "FmpAuthenticatedHandlerRsa2048Sha256 - Image: 0x%08x - 0x%08x\n", (UINTN)Image, (UINTN)ImageSize));
+
+  if (Image->AuthInfo.Hdr.dwLength != OFFSET_OF(WIN_CERTIFICATE_UEFI_GUID, CertData) + sizeof(EFI_CERT_BLOCK_RSA_2048_SHA256)) {
+    DEBUG((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256 - dwLength: 0x%04x, dwLength - 0x%04x\n", (UINTN)Image->AuthInfo.Hdr.dwLength, (UINTN)OFFSET_OF(WIN_CERTIFICATE_UEFI_GUID, CertData) + sizeof(EFI_CERT_BLOCK_RSA_2048_SHA256)));
+    return RETURN_INVALID_PARAMETER;
+  }
+
+  CertBlockRsa2048Sha256 = (EFI_CERT_BLOCK_RSA_2048_SHA256 *)Image->AuthInfo.CertData;
+  if (!CompareGuid(&CertBlockRsa2048Sha256->HashType, &gEfiHashAlgorithmSha256Guid)) {
+    DEBUG((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256 - HashType: %g, expect - %g\n", &CertBlockRsa2048Sha256->HashType, &gEfiHashAlgorithmSha256Guid));
+    return RETURN_INVALID_PARAMETER;
+  }
+
+  HashContext = NULL;
+  Rsa = NULL;
+
+  //
+  // Allocate hash context buffer required for SHA 256
+  //
+  HashContext = AllocatePool (Sha256GetContextSize ());
+  if (HashContext == NULL) {
+    CryptoStatus = FALSE;
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Can not allocate hash context\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Hash public key from data payload with SHA256.
+  //
+  ZeroMem (Digest, SHA256_DIGEST_SIZE);
+  CryptoStatus = Sha256Init (HashContext);
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Init() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+  CryptoStatus = Sha256Update (HashContext, &CertBlockRsa2048Sha256->PublicKey, sizeof(CertBlockRsa2048Sha256->PublicKey));
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Update() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+  CryptoStatus  = Sha256Final (HashContext, Digest);
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Final() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Fail if the PublicKey is not one of the public keys in PcdRsa2048Sha256PublicKeyBuffer
+  //
+  PublicKey = (VOID *)PublicKeyData;
+  PublicKeyBufferSize = PublicKeyDataLength;
+  CryptoStatus = FALSE;
+  while (PublicKeyBufferSize != 0) {
+    if (CompareMem (Digest, PublicKey, SHA256_DIGEST_SIZE) == 0) {
+      CryptoStatus = TRUE;
+      break;
+    }
+    PublicKey = PublicKey + SHA256_DIGEST_SIZE;
+    PublicKeyBufferSize = PublicKeyBufferSize - SHA256_DIGEST_SIZE;
+  }
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Public key in section is not supported\n"));
+    Status = RETURN_SECURITY_VIOLATION;
+    goto Done;
+  }
+
+  //
+  // Generate & Initialize RSA Context.
+  //
+  Rsa = RsaNew ();
+  if (Rsa == NULL) {
+    CryptoStatus = FALSE;
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: RsaNew() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Set RSA Key Components.
+  // NOTE: Only N and E are needed to be set as RSA public key for signature verification.
+  //
+  CryptoStatus = RsaSetKey (Rsa, RsaKeyN, CertBlockRsa2048Sha256->PublicKey, sizeof(CertBlockRsa2048Sha256->PublicKey));
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: RsaSetKey(RsaKeyN) failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+  CryptoStatus = RsaSetKey (Rsa, RsaKeyE, mRsaE, sizeof (mRsaE));
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: RsaSetKey(RsaKeyE) failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Hash data payload with SHA256.
+  //
+  ZeroMem (Digest, SHA256_DIGEST_SIZE);
+  CryptoStatus = Sha256Init (HashContext);
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Init() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  // It is a signature across the variable data and the Monotonic Count value.
+  CryptoStatus = Sha256Update (
+                   HashContext,
+                   (UINT8 *)Image + sizeof(Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength,
+                   ImageSize - sizeof(Image->MonotonicCount) - Image->AuthInfo.Hdr.dwLength
+                   );
+  if (!CryptoStatus) {
+    DEBUG((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Update() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+  CryptoStatus = Sha256Update (
+                   HashContext,
+                   (UINT8 *)&Image->MonotonicCount,
+                   sizeof(Image->MonotonicCount)
+                   );
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Update() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+  CryptoStatus  = Sha256Final (HashContext, Digest);
+  if (!CryptoStatus) {
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: Sha256Final() failed\n"));
+    Status = RETURN_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Verify the RSA 2048 SHA 256 signature.
+  //
+  CryptoStatus = RsaPkcs1Verify (
+                   Rsa,
+                   Digest,
+                   SHA256_DIGEST_SIZE,
+                   CertBlockRsa2048Sha256->Signature,
+                   sizeof (CertBlockRsa2048Sha256->Signature)
+                   );
+  if (!CryptoStatus) {
+    //
+    // If RSA 2048 SHA 256 signature verification fails, AUTH tested failed bit is set.
+    //
+    DEBUG ((DEBUG_ERROR, "FmpAuthenticatedHandlerRsa2048Sha256: RsaPkcs1Verify() failed\n"));
+    Status = RETURN_SECURITY_VIOLATION;
+    goto Done;
+  }
+  DEBUG ((DEBUG_INFO, "FmpAuthenticatedHandlerRsa2048Sha256: PASS verification\n"));
+
+  Status = RETURN_SUCCESS;
+
+Done:
+  //
+  // Free allocated resources used to perform RSA 2048 SHA 256 signature verification
+  //
+  if (Rsa != NULL) {
+    RsaFree (Rsa);
+  }
+  if (HashContext != NULL) {
+    FreePool (HashContext);
+  }
+
+  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 (&gEfiCertTypeRsa2048Sha256Guid, CertType)) {
+    //
+    // Call the match handler to extract raw data for the input section data.
+    //
+    Status = FmpAuthenticatedHandlerRsa2048Sha256 (
+               Image,
+               ImageSize,
+               PublicKeyData,
+               PublicKeyDataLength
+               );
+    return Status;
+  }
+
+  //
+  // Not found, the input guided section is not supported.
+  //
+  return RETURN_UNSUPPORTED;
+}
+
diff --git a/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.inf b/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.inf
new file mode 100644
index 0000000..fbff00e
--- /dev/null
+++ b/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.inf
@@ -0,0 +1,53 @@
+## @file
+#  FMP Authentication RSA2048SHA256 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                      = FmpAuthenticationLibRsa2048Sha256
+  MODULE_UNI_FILE                = FmpAuthenticationLibRsa2048Sha256.uni
+  FILE_GUID                      = 105FF0EA-A0C0-48A8-B8F7-E8B4D62A1019
+  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]
+  FmpAuthenticationLibRsa2048Sha256.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  SecurityPkg/SecurityPkg.dec
+  CryptoPkg/CryptoPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  MemoryAllocationLib
+  BaseCryptLib
+
+[Pcd]
+  gEfiSecurityPkgTokenSpaceGuid.PcdRsa2048Sha256PublicKeyBuffer
+
+[Guids]
+  gEfiCertTypeRsa2048Sha256Guid
+  gEfiHashAlgorithmSha256Guid
diff --git a/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.uni b/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.uni
new file mode 100644
index 0000000..902edef
--- /dev/null
+++ b/SecurityPkg/Library/FmpAuthenticationLibRsa2048Sha256/FmpAuthenticationLibRsa2048Sha256.uni
@@ -0,0 +1,26 @@
+// /** @file
+// FMP Authentication RSA2048SHA256 handler.
+//
+// This library provide FMP Authentication RSA2048SHA256 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 RSA2048SHA256 handler."
+
+#string STR_MODULE_DESCRIPTION          #language en-US "This library provide FMP Authentication RSA2048SHA256 handler to verify EFI_FIRMWARE_IMAGE_AUTHENTICATION."
+
-- 
2.7.4.windows.1