[PATCH v1 1/4] edk2-platforms:comcast: RDK boot manager Library implementation

[Moorthy Baskaravenkatraman <moorthy.baskaravenkatraman-sambamoorthy@linaro.org>]

From: Kalyan Nagabhirava <kalyankumar.nagabhirava@linaro.org>

Implemented features related to secure boot and DRI (downloading the image
and storing on flash), library has utility of file read and write operations
for fat flash partition, it reads file path and load the file content
using configuration file.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Moorthy Baskaravenkatraman <moorthy.baskaravenkatraman-sambamoorthy@linaro.org>
---
 Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.dec |  50 ++
 Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.inf |  76 +++
 Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.h   |  99 ++++
 Platform/Comcast/Library/RdkBootManagerLib/DiskIo.c              | 376 ++++++++++++++
 Platform/Comcast/Library/RdkBootManagerLib/HttpBoot.c            | 350 +++++++++++++
 Platform/Comcast/Library/RdkBootManagerLib/RdkFile.c             | 389 +++++++++++++++
 Platform/Comcast/Library/RdkBootManagerLib/SecureBoot.c          | 523 ++++++++++++++++++++
 7 files changed, 1863 insertions(+)

diff --git a/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.dec b/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.dec
new file mode 100644
index 000000000000..0db0c676a9b0
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.dec
@@ -0,0 +1,50 @@
+#
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#
+#  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]
+  DEC_SPECIFICATION              = 0x00010019
+  PACKAGE_NAME                   = RdkPkg
+  PACKAGE_GUID                   = 2f1f2d5e-d9e1-4aa1-8eb9-fed94682e140
+  PACKAGE_VERSION                = 0.1
+
+################################################################################
+#
+# Include Section - list of Include Paths that are provided by this package.
+#                   Comments are used for Keywords and Module Types.
+#
+# Supported Module Types:
+#  BASE SEC PEI_CORE PEIM DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER DXE_SAL_DRIVER UEFI_DRIVER UEFI_APPLICATION
+#
+################################################################################
+[Includes.common]
+#  Include                        # Root include for the package
+
+[Guids.common]
+  gRdkTokenSpaceGuid            =  { 0x408c1892, 0xf11a, 0x40c7, { 0xaa, 0x5f, 0x0d, 0x16, 0xc8, 0xb2, 0x52, 0x59 } }
+  gRdkGlobalVariableGuid        =  { 0xc3253c90, 0xa24f, 0x4599, { 0xa6, 0x64, 0x1f, 0x88, 0x13, 0x77, 0x8f, 0xc9 } }
+
+[PcdsFixedAtBuild.common]
+  # Rdk Library
+  gRdkTokenSpaceGuid.PcdRdkSystemPartitionName|""|VOID*|0x02000003
+  gRdkTokenSpaceGuid.PcdRdkConfFileName|""|VOID*|0x02000004
+  gRdkTokenSpaceGuid.PcdRdkCmdLineArgs|""|VOID*|0x02000013
+  gRdkTokenSpaceGuid.PcdRdkConfFileDevicePath|L""|VOID*|0x02000014
+  gRdkTokenSpaceGuid.PcdDtbAvailable|FALSE|BOOLEAN|0x00300014
+
+  # GUID of RdkSecureBootLoader
+  gRdkTokenSpaceGuid.PcdRdkSecureBootFile|{ 0x0f, 0x93, 0xc7, 0xb2, 0xef, 0x07, 0x05, 0x43, 0xac, 0x4e, 0x1c, 0xe2, 0x08, 0x5a, 0x70, 0x31 }|VOID*|0x00000100
+
+  # GUID of RdkDri
+  gRdkTokenSpaceGuid.PcdRdkDriFile|{ 0x8a, 0xa1, 0x1b, 0x08, 0x1e, 0xd7, 0xa7, 0x40, 0x99, 0xa9, 0xcd, 0xb8, 0x64, 0x63, 0x96, 0x6d }|VOID*|0x00001000
+
+  # GUID of RdkDriSecureBootLoader
+  gRdkTokenSpaceGuid.PcdRdkDriSecureBootFile|{ 0xd7, 0xd1, 0x52, 0xdd, 0xe2, 0x0d, 0x52, 0x45, 0x98, 0xe0, 0x8d, 0xbe, 0xe4, 0x58, 0xa5, 0x02 }|VOID*|0x00100000
diff --git a/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.inf b/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.inf
new file mode 100644
index 000000000000..0db783613740
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.inf
@@ -0,0 +1,76 @@
+#
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#  Copyright (c) 2016-2017, Comcast. All rights reserved.
+#
+#  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 Section - statements that will be processed to create a Makefile.
+#
+################################################################################
+
+[Defines]
+  INF_VERSION     = 0x0001001A
+  BASE_NAME       = RdkBootManagerLib
+  FILE_GUID       = 901f54f2-9d70-9b89-9c0a-d9ca25379059
+  MODULE_TYPE     = DXE_DRIVER
+  VERSION_STRING  = 1.0
+  LIBRARY_CLASS   = RdkBootManagerLib|DXE_DRIVER DXE_RUNTIME_DRIVER UEFI_APPLICATION UEFI_DRIVER
+
+[Sources]
+  DiskIo.c
+  SecureBoot.c
+  HttpBoot.c
+  RdkFile.c
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  NetworkPkg/NetworkPkg.dec
+  Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.dec
+  ShellPkg/ShellPkg.dec
+  SecurityPkg/SecurityPkg.dec
+
+[Guids]
+  gEfiCertX509Guid
+  gEfiCertPkcs7Guid
+  gEfiCustomModeEnableGuid
+  gEfiImageSecurityDatabaseGuid
+  gFdtTableGuid
+  gRdkGlobalVariableGuid
+
+[Protocols]
+  gEfiBlockIoProtocolGuid
+  gEfiDevicePathToTextProtocolGuid
+  gEfiDevicePathFromTextProtocolGuid
+  gEfiLoadedImageProtocolGuid
+  gEfiShellProtocolGuid
+  gEfiDiskIoProtocolGuid
+  gEfiLoadFileProtocolGuid
+
+[Pcd]
+  gRdkTokenSpaceGuid.PcdRdkCmdLineArgs
+  gRdkTokenSpaceGuid.PcdRdkSystemPartitionName
+  gRdkTokenSpaceGuid.PcdRdkConfFileName
+  gRdkTokenSpaceGuid.PcdRdkConfFileDevicePath
+  gRdkTokenSpaceGuid.PcdDtbAvailable
+
+[LibraryClasses]
+  ArmLib
+  BaseLib
+  DebugLib
+  DevicePathLib
+  FileHandleLib
+  NetLib
+  PcdLib
+
diff --git a/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.h b/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.h
new file mode 100644
index 000000000000..f3685363d38e
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/RdkBootManagerLib.h
@@ -0,0 +1,99 @@
+/*
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#
+#  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.
+#
+*/
+#ifndef __RDK_BOOT_MANAGER_LIB_H__
+#define __RDK_BOOT_MANAGER_LIB_H__
+
+#include <Library/BdsLib.h>
+#include <Library/UefiLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/ShellLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/FileHandleLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Protocol/DiskIo.h>
+#include <Protocol/BlockIo.h>
+#include <Protocol/LoadFile.h>
+#include <Protocol/SimpleTextOut.h>
+#include <Protocol/DevicePathFromText.h>
+#include <Protocol/DevicePathToText.h>
+#include <Protocol/AndroidFastbootPlatform.h>
+#include <Guid/ImageAuthentication.h>
+#include <Guid/AuthenticatedVariableFormat.h>
+#include <HttpBootDxe/HttpBootDxe.h>
+#include <Include/Guid/AuthenticatedVariableFormat.h>
+
+extern
+EFI_STATUS
+PartitionRead (
+  IN CHAR8  *PartitionName,
+  IN VOID   *Image,
+  IN UINTN  Size
+  );
+
+extern
+EFI_STATUS
+PartitionWrite (
+  IN CHAR8  *PartitionName,
+  IN VOID   *Image,
+  IN UINTN  Size
+  );
+
+extern
+EFI_STATUS
+GetRdkVariable (
+  IN  CONST CHAR16  *Name,
+  OUT CONST CHAR16  **Value
+  );
+
+extern
+EFI_STATUS
+RdkSecureBoot (
+  EFI_HANDLE		ImageHandle,
+  EFI_BOOT_SERVICES     *BootServices
+  );
+
+extern
+EFI_STATUS
+RdkReadFile (
+  IN  	CONST CHAR16 	*Path,
+  IN OUT  VOID          **BufferPtr,
+  OUT  	UINTN           *FileSize
+  );
+
+extern
+EFI_STATUS
+RdkWriteFile (
+  IN  	CONST CHAR16    *Path,
+  IN OUT  VOID          **BufferPtr,
+  OUT  	UINTN           *FileSize
+  );
+
+extern
+EFI_STATUS
+GetFileHandler (
+  OUT 	EFI_FILE_HANDLE *FileHandle,
+  IN 	CONST CHAR16    *Path,
+  IN  	UINT64          OpenMode
+  );
+
+extern
+EFI_STATUS
+RdkHttpBoot (
+  VOID
+  );
+
+#endif /* __RDK_BOOT_MANAGER_LIB_H__ */
diff --git a/Platform/Comcast/Library/RdkBootManagerLib/DiskIo.c b/Platform/Comcast/Library/RdkBootManagerLib/DiskIo.c
new file mode 100644
index 000000000000..2699bd395a05
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/DiskIo.c
@@ -0,0 +1,376 @@
+/*
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#
+#  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 <RdkBootManagerLib.h>
+
+/* See sparse_format.h in AOSP  */
+#define SPARSE_HEADER_MAGIC       0xed26ff3a
+#define CHUNK_TYPE_RAW            0xCAC1
+#define CHUNK_TYPE_FILL           0xCAC2
+#define CHUNK_TYPE_DONT_CARE      0xCAC3
+#define CHUNK_TYPE_CRC32          0xCAC4
+
+#define PARTITION_NAME_MAX_LENGTH     72/2
+
+#define FLASH_DEVICE_PATH_SIZE(DevPath) ( GetDevicePathSize (DevPath) - \
+    sizeof (EFI_DEVICE_PATH_PROTOCOL))
+
+#define IS_ALPHA(Char) (((Char) <= L'z' && (Char) >= L'a') || \
+    ((Char) <= L'Z' && (Char) >= L'Z'))
+
+typedef struct _DISKIO_PARTITION_LIST {
+  LIST_ENTRY  Link;
+  CHAR16      PartitionName[PARTITION_NAME_MAX_LENGTH];
+  EFI_HANDLE  PartitionHandle;
+} DISKIO_PARTITION_LIST;
+
+typedef struct _SPARSE_HEADER {
+  UINT32    Magic;
+  UINT16    MajorVersion;
+  UINT16    MinorVersion;
+  UINT16    FileHeaderSize;
+  UINT16    ChunkHeaderSize;
+  UINT32    BlockSize;
+  UINT32    TotalBlocks;
+  UINT32    TotalChunks;
+  UINT32    ImageChecksum;
+} SPARSE_HEADER;
+
+typedef struct _CHUNK_HEADER {
+  UINT16    ChunkType;
+  UINT16    Reserved1;
+  UINT32    ChunkSize;
+  UINT32    TotalSize;
+} CHUNK_HEADER;
+
+STATIC LIST_ENTRY       mPartitionListHead;
+STATIC EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *mTextOut;
+
+/*
+ * Helper to free the partition list
+ */
+STATIC
+VOID
+FreePartitionList (
+  VOID
+)
+{
+  DISKIO_PARTITION_LIST *Entry;
+  DISKIO_PARTITION_LIST *NextEntry;
+
+  Entry = (DISKIO_PARTITION_LIST *)GetFirstNode (&mPartitionListHead);
+  while (!IsNull (&mPartitionListHead, &Entry->Link)) {
+    NextEntry = (DISKIO_PARTITION_LIST *) GetNextNode (\
+      &mPartitionListHead, &Entry->Link);
+
+    RemoveEntryList (&Entry->Link);
+    FreePool (Entry);
+
+    Entry = NextEntry;
+  }
+}
+
+/*
+ * lists the available Block Io and adds handle of given dev path
+ */
+STATIC
+EFI_STATUS
+ListBlockIos (
+  IN CHAR16       *PartitionName
+  )
+{
+  EFI_STATUS                        Status;
+  EFI_HANDLE                        *AllHandles;
+  EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *DevPathToText;
+  EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
+  UINTN                             LoopIndex;
+  UINTN                             NumHandles;
+  UINT16                            *DeviceFullPath;
+  DISKIO_PARTITION_LIST             *Entry;
+
+  InitializeListHead (&mPartitionListHead);
+
+  Status = gBS->LocateProtocol (
+    &gEfiDevicePathToTextProtocolGuid,
+    NULL,
+    (VOID **) &DevPathToText
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  // Get every Block IO protocol instance installed in the system
+  Status = gBS->LocateHandleBuffer (
+    ByProtocol,
+    &gEfiBlockIoProtocolGuid,
+    NULL,
+    &NumHandles,
+    &AllHandles
+    );
+  ASSERT_EFI_ERROR (Status);
+  DEBUG ((DEBUG_INFO, "Block IO: %d handles \n", NumHandles));
+
+  // Get HTTP driver handle from AllHandles
+  for (LoopIndex = 0; LoopIndex < NumHandles; LoopIndex++) {
+    // Get the device path for the handle
+    Status = gBS->OpenProtocol (
+      AllHandles[LoopIndex],
+      &gEfiDevicePathProtocolGuid,
+      (VOID **) &DevicePath,
+      gImageHandle,
+      NULL,
+      EFI_OPEN_PROTOCOL_GET_PROTOCOL
+      );
+
+    DeviceFullPath = DevPathToText->ConvertDevicePathToText (
+      DevicePath,
+      FALSE,
+      TRUE
+      );
+
+    DEBUG((DEBUG_INFO,"Handle[%d] is %p, fullpath %s\n", \
+      LoopIndex, AllHandles[LoopIndex], DeviceFullPath));
+
+    if (StrCmp (PartitionName, DeviceFullPath) == 0) {
+      DEBUG((DEBUG_INFO, "rootfs partition path matched\n"));
+      //
+      // Add the partition handle to the list
+      //
+      // Create entry
+      Entry = AllocatePool (sizeof (DISKIO_PARTITION_LIST));
+      if (Entry == NULL) {
+        Status = EFI_OUT_OF_RESOURCES;
+        goto Exit;
+      }
+
+      // Copy handle and partition name
+      Entry->PartitionHandle = AllHandles[LoopIndex];
+      StrnCpy (
+        Entry->PartitionName,
+        PartitionName,
+        PARTITION_NAME_MAX_LENGTH
+      );
+      InsertTailList (&mPartitionListHead, &Entry->Link);
+      break;
+    }
+  }
+  FreePool (AllHandles);
+  ASSERT (LoopIndex < NumHandles);
+Exit:
+  return Status;
+}
+
+STATIC
+EFI_STATUS
+OpenPartition (
+  IN  CHAR8       *PartitionName,
+  IN  VOID        *Image,
+  IN  UINTN       Size,
+  OUT EFI_BLOCK_IO_PROTOCOL     **BlockIo,
+  OUT EFI_DISK_IO_PROTOCOL      **DiskIo
+  )
+{
+  EFI_STATUS               Status;
+  UINTN                    PartitionSize;
+  DISKIO_PARTITION_LIST    *Entry;
+  SPARSE_HEADER            *SparseHeader;
+  UINT16                   UnicodePartitionName[100];
+
+  AsciiStrToUnicodeStr ( PartitionName, UnicodePartitionName);
+  DEBUG((DEBUG_INFO, "Unicode partition name %s\n", UnicodePartitionName));
+
+  Status = ListBlockIos (UnicodePartitionName);
+  ASSERT_EFI_ERROR (Status);
+
+  Entry = (DISKIO_PARTITION_LIST *)GetFirstNode (&(mPartitionListHead));
+  ASSERT (Entry != NULL);
+
+  Status = gBS->OpenProtocol (
+    Entry->PartitionHandle,
+    &gEfiBlockIoProtocolGuid,
+    (VOID **) BlockIo,
+    gImageHandle,
+    NULL,
+    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+    );
+
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "Unable to open Block IO protocol: %r\n", Status));
+    Status = EFI_NOT_FOUND;
+    goto Exit;
+  }
+
+  SparseHeader = (SPARSE_HEADER *)Image;
+
+  if (SparseHeader->Magic == SPARSE_HEADER_MAGIC) {
+    DEBUG ((DEBUG_INFO, \
+      "Sparse Magic: 0x%x Major: %d Minor: %d fhs: %d chs: %d bs: %d tbs: %d tcs: %d checksum: %d \n", \
+      SparseHeader->Magic, SparseHeader->MajorVersion, \
+      SparseHeader->MinorVersion,  SparseHeader->FileHeaderSize, \
+      SparseHeader->ChunkHeaderSize, SparseHeader->BlockSize, \
+      SparseHeader->TotalBlocks, \
+      SparseHeader->TotalChunks, SparseHeader->ImageChecksum));
+
+    if (SparseHeader->MajorVersion != 1) {
+      DEBUG ((DEBUG_ERROR, "Sparse image version %d.%d not supported.\n",
+            SparseHeader->MajorVersion, SparseHeader->MinorVersion));
+      Status = EFI_INVALID_PARAMETER;
+      goto Exit;
+    }
+
+    Size = SparseHeader->BlockSize * SparseHeader->TotalBlocks;
+  }
+
+  // Check image will fit on device
+  PartitionSize = (BlockIo[0]->Media->LastBlock + 1) * BlockIo[0]->Media->BlockSize;
+  if (PartitionSize < Size) {
+    DEBUG ((DEBUG_ERROR, "Partition not big enough.\n"));
+    DEBUG ((DEBUG_ERROR, \
+      "Partition Size:\t%ld\nImage Size:\t%ld\n", PartitionSize, Size));
+
+    Status = EFI_VOLUME_FULL;
+    goto Exit;
+  }
+
+  Status = gBS->OpenProtocol (
+    Entry->PartitionHandle,
+    &gEfiDiskIoProtocolGuid,
+    (VOID **) DiskIo,
+    gImageHandle,
+    NULL,
+    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+    );
+
+Exit:
+  FreePartitionList ();
+  return Status;
+}
+
+EFI_STATUS
+PartitionRead (
+  IN CHAR8  *PartitionName,
+  IN VOID   *Image,
+  IN UINTN  Size
+  )
+{
+  EFI_STATUS               Status;
+  EFI_BLOCK_IO_PROTOCOL    *BlockIo;
+  EFI_DISK_IO_PROTOCOL     *DiskIo;
+  UINT32                   MediaId;
+
+  Status = OpenPartition (PartitionName, Image, Size, &BlockIo, &DiskIo);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  MediaId = BlockIo->Media->MediaId;
+
+  Status = DiskIo->ReadDisk (DiskIo, MediaId, 0, Size, Image);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  BlockIo->FlushBlocks(BlockIo);
+
+Exit:
+  return Status;
+}
+
+EFI_STATUS
+PartitionWrite (
+  IN CHAR8  *PartitionName,
+  IN VOID   *Image,
+  IN UINTN  Size
+  )
+{
+  EFI_STATUS               Status;
+  EFI_BLOCK_IO_PROTOCOL    *BlockIo;
+  EFI_DISK_IO_PROTOCOL     *DiskIo;
+  UINT32                   MediaId;
+  SPARSE_HEADER            *SparseHeader;
+  CHUNK_HEADER             *ChunkHeader;
+  UINT32                   Chunk;
+  UINTN                    Offset;
+
+  Status = OpenPartition (PartitionName, Image, Size, &BlockIo, &DiskIo);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  Offset = 0;
+  MediaId = BlockIo->Media->MediaId;
+  SparseHeader = (SPARSE_HEADER *)Image;
+
+  if (SparseHeader->Magic == SPARSE_HEADER_MAGIC) {
+    CHAR16 OutputString[64];
+    UINTN ChunkPrintDensity =
+      SparseHeader->TotalChunks > 1600 ? SparseHeader->TotalChunks / 200 : 32;
+
+    Image += SparseHeader->FileHeaderSize;
+    for (Chunk = 0; Chunk < SparseHeader->TotalChunks; Chunk++) {
+      UINTN WriteSize;
+      ChunkHeader = (CHUNK_HEADER *)Image;
+
+      // Show progress. Don't do it for every packet as outputting text
+      // might be time consuming. ChunkPrintDensity is calculated to
+      // provide an update every half percent change for large
+      // downloads.
+      if (Chunk % ChunkPrintDensity == 0) {
+        UnicodeSPrint(OutputString, sizeof(OutputString),
+          L"\r%5d / %5d chunks written (%d%%)", Chunk,
+          SparseHeader->TotalChunks,
+          (Chunk * 100) / SparseHeader->TotalChunks);
+        mTextOut->OutputString(mTextOut, OutputString);
+      }
+
+      DEBUG ((DEBUG_INFO, "Chunk #%d - Type: 0x%x Size: %d TotalSize: %d Offset %d\n",
+        (Chunk+1), ChunkHeader->ChunkType, ChunkHeader->ChunkSize,
+        ChunkHeader->TotalSize, Offset));
+      Image += sizeof(CHUNK_HEADER);
+      WriteSize = (SparseHeader->BlockSize) * ChunkHeader->ChunkSize;
+      switch (ChunkHeader->ChunkType) {
+        case CHUNK_TYPE_RAW:
+          DEBUG ((DEBUG_INFO, "Writing %d at Offset %d\n", WriteSize, Offset));
+          Status = DiskIo->WriteDisk (DiskIo, MediaId, Offset, WriteSize, Image);
+          if (EFI_ERROR (Status)) {
+            goto Exit;
+          }
+          Image += WriteSize;
+          break;
+        case CHUNK_TYPE_DONT_CARE:
+          break;
+        case CHUNK_TYPE_CRC32:
+          break;
+        default:
+          DEBUG ((DEBUG_ERROR, "Unknown Chunk Type: 0x%x", ChunkHeader->ChunkType));
+          Status = EFI_PROTOCOL_ERROR;
+          goto Exit;
+      }
+      Offset += WriteSize;
+    }
+
+    UnicodeSPrint (OutputString, sizeof (OutputString),
+        L"\r%5d / %5d chunks written (100%%)\r\n",
+        SparseHeader->TotalChunks, SparseHeader->TotalChunks);
+    mTextOut->OutputString(mTextOut, OutputString);
+
+  } else {
+
+    Status = DiskIo->WriteDisk (DiskIo, MediaId, 0, Size, Image);
+    if (EFI_ERROR (Status)) {
+      goto Exit;
+    }
+  }
+
+  BlockIo->FlushBlocks (BlockIo);
+
+Exit:
+  return Status;
+}
diff --git a/Platform/Comcast/Library/RdkBootManagerLib/HttpBoot.c b/Platform/Comcast/Library/RdkBootManagerLib/HttpBoot.c
new file mode 100644
index 000000000000..5de1427adbb6
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/HttpBoot.c
@@ -0,0 +1,350 @@
+/*
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#
+#  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 <RdkBootManagerLib.h>
+
+#define FILE_HDR_SIZE 16
+
+STATIC EFI_LOAD_FILE_PROTOCOL  *LoadFile = NULL;
+STATIC HTTP_BOOT_PRIVATE_DATA  *Private  = NULL;
+
+STATIC
+VOID
+HttpPrivateFromLoadFile (
+  IN   EFI_LOAD_FILE_PROTOCOL   *LoadFile,
+  OUT  HTTP_BOOT_PRIVATE_DATA   **Private
+  )
+{
+  HTTP_BOOT_VIRTUAL_NIC  *Ip4Nic = NULL;
+
+  UINTN Offset = (UINTN)&Ip4Nic->LoadFile;
+
+  Ip4Nic = (VOID *)((CHAR8 *)LoadFile - Offset);
+  ASSERT (Ip4Nic->Signature == HTTP_BOOT_VIRTUAL_NIC_SIGNATURE);
+  *Private = Ip4Nic->Private;
+}
+
+STATIC
+VOID
+HttpGetLoadFileHandle (
+  OUT EFI_LOAD_FILE_PROTOCOL  **LoadFile
+  )
+{
+  EFI_STATUS                        Status;
+  UINTN                             LoopIndex;
+  UINTN                             NumHandles;
+  EFI_HANDLE                        *AllHandles;
+  EFI_HANDLE                        Handle;
+  EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
+  EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *DevPathToText;
+  UINT16                            *DeviceFullPath;
+
+  Status = gBS->LocateProtocol (
+    &gEfiDevicePathToTextProtocolGuid,
+    NULL,
+    (VOID **) &DevPathToText
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  // Get every LoadFile protocol instance installed in the system
+  Status = gBS->LocateHandleBuffer (
+    ByProtocol,
+    &gEfiLoadFileProtocolGuid,
+    NULL,
+    &NumHandles,
+    &AllHandles
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  // Get HTTP driver handle from AllHandles
+  for (LoopIndex = 0; LoopIndex < NumHandles; LoopIndex++) {
+
+    Handle = AllHandles[LoopIndex];
+
+    // Get the device path for the handle
+    Status = gBS->OpenProtocol (
+      Handle,
+      &gEfiDevicePathProtocolGuid,
+      (VOID **) &DevicePath,
+      gImageHandle,
+      NULL,
+      EFI_OPEN_PROTOCOL_GET_PROTOCOL
+      );
+    ASSERT_EFI_ERROR (Status);
+
+    DeviceFullPath = DevPathToText->ConvertDevicePathToText (
+      DevicePath,
+      FALSE,
+      TRUE
+      );
+
+    ASSERT (DeviceFullPath != NULL);
+
+    if (StrStr (DeviceFullPath, L"IPv4") != NULL) {
+      DEBUG((DEBUG_INFO, "IPv4 protocol found\n"));
+      Status = gBS->OpenProtocol (
+        Handle,
+        &gEfiLoadFileProtocolGuid,
+        (VOID **) LoadFile,
+        gImageHandle,
+        NULL,
+        EFI_OPEN_PROTOCOL_GET_PROTOCOL
+        );
+      ASSERT_EFI_ERROR (Status);
+
+      FreePool (AllHandles);
+      break;
+    }
+  }
+
+  ASSERT (LoopIndex < NumHandles);
+}
+
+STATIC
+EFI_STATUS
+HttpUpdatePath (
+  IN   CHAR16                   *Uri,
+  OUT  EFI_DEVICE_PATH_PROTOCOL **NewDevicePath
+  )
+{
+  EFI_DEV_PATH              *Node;
+  EFI_DEVICE_PATH_PROTOCOL  *TmpDevicePath;
+  EFI_STATUS                Status;
+  UINTN                     Index;
+  UINTN                     Length;
+  CHAR8                     AsciiUri[URI_STR_MAX_SIZE];
+
+  Node           = NULL;
+  TmpDevicePath  = NULL;
+  Status         = EFI_SUCCESS;
+
+  // Convert the scheme to all lower case.
+  for (Index = 0; Index < StrLen (Uri); Index++) {
+    if (Uri[Index] == L':') {
+      break;
+    }
+    if (Uri[Index] >= L'A' && Uri[Index] <= L'Z') {
+      Uri[Index] -= (CHAR16)(L'A' - L'a');
+    }
+  }
+
+  // Only accept empty URI, or http and https URI.
+  if ((StrLen (Uri) != 0) &&
+    (StrnCmp (Uri, L"http://", 7) != 0) &&
+    (StrnCmp (Uri, L"https://", 8) != 0)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  // Create a new device path by appending the IP node and URI node to
+  // the driver's parent device path
+  Node = AllocateZeroPool (sizeof (IPv4_DEVICE_PATH));
+  if (Node == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit;
+  }
+  Node->Ipv4.Header.Type    = MESSAGING_DEVICE_PATH;
+  Node->Ipv4.Header.SubType = MSG_IPv4_DP;
+  SetDevicePathNodeLength (Node, sizeof (IPv4_DEVICE_PATH));
+  TmpDevicePath = AppendDevicePathNode (\
+    Private->ParentDevicePath, (EFI_DEVICE_PATH_PROTOCOL*)Node);
+  FreePool (Node);
+  if (TmpDevicePath == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  // Update the URI node with the input boot file URI.
+  UnicodeStrToAsciiStrS (Uri, AsciiUri, sizeof (AsciiUri));
+  Length = sizeof (EFI_DEVICE_PATH_PROTOCOL) + AsciiStrSize (AsciiUri);
+  Node = AllocatePool (Length);
+  if (Node == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    FreePool (TmpDevicePath);
+    goto Exit;
+  }
+  Node->DevPath.Type    = MESSAGING_DEVICE_PATH;
+  Node->DevPath.SubType = MSG_URI_DP;
+
+  SetDevicePathNodeLength (Node, Length);
+  CopyMem ((UINT8*) Node + sizeof (EFI_DEVICE_PATH_PROTOCOL), \
+    AsciiUri, AsciiStrSize (AsciiUri));
+  *NewDevicePath = AppendDevicePathNode (TmpDevicePath, \
+    (EFI_DEVICE_PATH_PROTOCOL*) Node);
+
+  FreePool (Node);
+  FreePool (TmpDevicePath);
+
+  if (*NewDevicePath == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit;
+  }
+
+Exit:
+
+  return Status;
+}
+
+STATIC
+EFI_STATUS
+HttpGetImage (
+  IN   CHAR16  *Uri,
+  OUT  UINT8   **FileBuffer,
+  OUT  UINTN   *FileSize
+  )
+{
+  EFI_DEVICE_PATH_PROTOCOL  *NewDevicePath;
+  EFI_STATUS                Status;
+
+  *FileBuffer   = NULL;
+  NewDevicePath = NULL;
+  *FileSize     = 0;
+
+  // Get the LoadFile Handle and
+  // Private structure of HTTP driver
+  if (LoadFile == NULL) {
+    HttpGetLoadFileHandle (&LoadFile);
+    HttpPrivateFromLoadFile (LoadFile, &Private);
+  }
+
+  // Update URI path
+  Status = HttpUpdatePath (Uri, &NewDevicePath);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  // Get the HTTP image from server
+  Status = LoadFile->LoadFile (LoadFile, NewDevicePath, \
+    TRUE, FileSize, *FileBuffer);
+  if((Status != EFI_WARN_FILE_SYSTEM) && \
+    (Status != EFI_BUFFER_TOO_SMALL)) {
+    goto Exit;
+  }
+
+  *FileBuffer = AllocatePool (*FileSize);
+  if (*FileBuffer == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit;
+  }
+
+  Status = LoadFile->LoadFile (LoadFile, NewDevicePath, \
+    TRUE, FileSize, *FileBuffer);
+  if (EFI_ERROR (Status)) {
+    FreePool (FileBuffer);
+    goto Exit;
+  }
+
+Exit:
+
+  if (NewDevicePath != NULL) {
+    FreePool (NewDevicePath);
+  }
+
+  return Status;
+}
+
+UINTN
+ParseHeader (
+  VOID * Str
+  )
+{
+  UINTN i, Size;
+  UINT8 *Ptr;
+
+  Ptr = Str;
+  for (i = 0, Size = 0; i < FILE_HDR_SIZE; i++) {
+      Size = (Ptr[i] - '0') + (Size * 10);
+  }
+
+  return Size;
+}
+
+EFI_STATUS
+RdkHttpBoot (
+  VOID
+  )
+{
+  EFI_STATUS  	Status;
+  VOID        	*FilePtr;
+  UINT8       	*FileBuffer;
+  UINT16      	*Uri;
+  UINTN       	FileSize;
+  UINTN       	LoopIndex;
+  UINTN       	Size;
+  CONST CHAR16  *DtbPath;
+  CONST CHAR16	*ImagePath;
+  CONST CHAR16  *ServerUrlPath;
+
+  Status = GetRdkVariable (L"URL", &ServerUrlPath);
+  ASSERT_EFI_ERROR (Status);
+
+  // Get the Server name stored in file Server.url
+  Status = RdkReadFile (ServerUrlPath, (VOID **)&FileBuffer, &FileSize);
+  ASSERT_EFI_ERROR (Status);
+
+  Uri = AllocateZeroPool (sizeof(*Uri) * (FileSize + 1));
+  if (Uri == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    ASSERT_EFI_ERROR (Status);
+  }
+
+  for(LoopIndex = 0; LoopIndex < FileSize; LoopIndex++) {
+    Uri[LoopIndex] = FileBuffer[LoopIndex];
+  }
+
+  if(FileBuffer[FileSize-1] == '\n') {
+    Uri[FileSize-1] = '\0';
+  }
+
+  FreePool (FileBuffer);
+  FileBuffer=NULL;
+
+  // Disable watchdog
+  Status = gBS->SetWatchdogTimer (0, 0x10000, 0, NULL);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_WARN, \
+      "HttpBoot: Couldn't disable watchdog timer: %r\n", Status));
+  }
+
+  // Get the File from server using it's URI
+  Status = HttpGetImage (Uri, &FileBuffer, &FileSize);
+  ASSERT_EFI_ERROR (Status);
+
+  // Write the received image to flash
+  FilePtr   = FileBuffer;
+  Size      = ParseHeader (FilePtr);
+  FilePtr  += FILE_HDR_SIZE;
+  Status    = PartitionWrite ((CHAR8 *)FixedPcdGetPtr (\
+    PcdRdkSystemPartitionName), FilePtr, Size);
+  ASSERT_EFI_ERROR (Status);
+
+  FilePtr  += Size;
+  Size      = ParseHeader (FilePtr);
+  FilePtr  += FILE_HDR_SIZE;
+  Status    = GetRdkVariable (L"IMAGE", &ImagePath);
+  ASSERT_EFI_ERROR (Status);
+  Status    = RdkWriteFile (ImagePath, &FilePtr, &Size);
+  ASSERT_EFI_ERROR (Status);
+
+  if ( FixedPcdGetBool (PcdDtbAvailable) ) {
+  FilePtr  += Size;
+  Size      = ParseHeader (FilePtr);
+  FilePtr  += FILE_HDR_SIZE;
+  Status    = GetRdkVariable (L"DTB", &DtbPath);
+  ASSERT_EFI_ERROR (Status);
+  Status    = RdkWriteFile (DtbPath, &FilePtr, &Size);
+  ASSERT_EFI_ERROR (Status);
+  }
+
+  FreePool (FileBuffer);
+  FreePool (Uri);
+
+  return Status;
+}
diff --git a/Platform/Comcast/Library/RdkBootManagerLib/RdkFile.c b/Platform/Comcast/Library/RdkBootManagerLib/RdkFile.c
new file mode 100644
index 000000000000..fbe70bceb24e
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/RdkFile.c
@@ -0,0 +1,389 @@
+/*
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#
+#  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 <RdkBootManagerLib.h>
+
+#define MAX_VAR       6
+
+#define ALLOCATE_STRING_MEM(X)  AllocateZeroPool((X + 1) * sizeof(CHAR16))
+
+/**
+ * list_for_each_entry	-	iterate over list of given type
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define LIST_FOR_EACH_ENTRY(Pos, Head, Member)				\
+	for (Pos = BASE_CR((Head)->ForwardLink, typeof(*Pos), Member);	\
+	     &Pos->Member != (Head);					\
+	     Pos = BASE_CR(Pos->Member.ForwardLink, typeof(*Pos), Member))
+
+/**
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos:	the type * to use as a loop cursor.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define LIST_FOR_EACH_ENTRY_SAFE(Pos, N, Head, Member)			\
+	for (Pos = BASE_CR((Head)->ForwardLink, typeof(*Pos), Member),	\
+		N = BASE_CR(Pos->Member.ForwardLink, typeof(*Pos), Member);	\
+	     &Pos->Member != (Head);					\
+	     Pos = N, N = BASE_CR(N->Member.ForwardLink, typeof(*N), Member))
+
+/* ************************** */
+
+typedef struct {
+  CHAR16  *Name;
+  LIST_ENTRY List;
+} DIR_NODE;
+/* ************************** */
+
+STATIC UINT8    VarablesInitialzed = 0;
+STATIC CHAR16   *VarResult[MAX_VAR][2];
+
+STATIC
+VOID
+SaveString (
+  OUT CHAR16    **Dest,
+  IN  CHAR16    *String1,
+  IN  CHAR16    *String2
+  )
+{
+  *Dest = ALLOCATE_STRING_MEM (StrLen (String1) + StrLen (String2));
+  ASSERT (Dest != NULL);
+  StrCat (*Dest, String1);
+  StrCat (*Dest, String2);
+}
+
+STATIC
+EFI_STATUS
+LsFiles (
+  IN  CONST CHAR16  *DirPath,
+  IN  CONST CHAR16  *TargetFile,
+  OUT CHAR16        **Result,
+  IN  LIST_ENTRY    *Head
+  )
+{
+  EFI_STATUS          Status;
+  EFI_FILE_INFO       *FileInfo;
+  EFI_FILE_PROTOCOL   *FileHandle;
+  BOOLEAN             NoFile;
+  CHAR16              *TempPath;
+  DIR_NODE            *Node;
+
+  NoFile    = FALSE;
+  TempPath  = ALLOCATE_STRING_MEM (StrLen(DirPath) + 1);
+  StrCat (TempPath, DirPath);
+  StrCat (TempPath, L"/");
+
+  Status = GetFileHandler (&FileHandle, DirPath, EFI_FILE_MODE_READ);
+  ASSERT_EFI_ERROR (Status);
+
+  for ( Status = FileHandleFindFirstFile (FileHandle, &FileInfo);
+    !EFI_ERROR (Status) && !NoFile;
+    Status = FileHandleFindNextFile (FileHandle, FileInfo, &NoFile)
+    ) {
+    if ( (FileInfo->Attribute & EFI_FILE_DIRECTORY) &&
+      (StrCmp (FileInfo->FileName, L".") != 0) &&
+      (StrCmp (FileInfo->FileName, L"..") != 0)) {
+      Node = AllocateZeroPool (sizeof (DIR_NODE));
+      //append directory name to the path
+      SaveString (&Node->Name, TempPath, FileInfo->FileName);
+      InsertHeadList (Head, &Node->List);
+    } else if (StrCmp (FileInfo->FileName, TargetFile) == 0) {
+      //append file to the absolute path
+      SaveString (Result, TempPath, FileInfo->FileName);
+      Status = EFI_SUCCESS;
+      goto Exit;
+    }
+  }
+
+  Status = EFI_NOT_FOUND;
+
+Exit:
+  FreePool (TempPath);
+  return Status;
+}
+
+STATIC
+VOID
+DelDirList (
+  IN  LIST_ENTRY *Head
+  )
+{
+  DIR_NODE  *Node;
+  DIR_NODE  *Temp;
+
+  LIST_FOR_EACH_ENTRY_SAFE (Node, Temp, Head, List) {
+    RemoveEntryList (&Node->List);
+    FreePool (Node->Name);
+    FreePool (Node);
+  }
+}
+
+STATIC
+EFI_STATUS
+FindFileInDir (
+  IN  CONST CHAR16  *DevPath,
+  IN  CONST CHAR16  *TargetFile,
+  OUT CHAR16        **Result
+  )
+{
+  UINT8       Current;
+  UINT8       Next;
+  DIR_NODE    *Temp;
+  LIST_ENTRY  DirList[2];
+
+  *Result           = NULL;
+  EFI_STATUS Status = EFI_NOT_FOUND;
+
+  InitializeListHead (&DirList[0]);
+  InitializeListHead (&DirList[1]);
+
+  for (Current = Next = 0, Status = LsFiles (\
+    DevPath, TargetFile, Result, &DirList[Current]);
+    !IsListEmpty (&DirList[Current]);
+    Current = Next) {
+    Next = Current ^ 1;
+    DelDirList (&DirList[Next]);
+
+    LIST_FOR_EACH_ENTRY (Temp, &DirList[Current], List) {
+      Status = LsFiles (Temp->Name, TargetFile, Result, &DirList[Next]);
+      if (!EFI_ERROR (Status)) {
+        DelDirList (&DirList[Current]);
+        break;
+      }
+    }
+  }
+
+  DelDirList (&DirList[Next]);
+  return Status;
+}
+
+STATIC
+UINTN
+StrSpn (
+  IN CHAR8    *String,
+  IN CHAR8    *CharSet
+  )
+{
+  UINTN Count;
+
+  for (Count = 0;
+    String[Count] && ! (String[Count] == CharSet[0]);
+    Count++);
+  return Count;
+}
+
+STATIC
+EFI_STATUS
+InitVarList (
+  IN  CHAR8  *FileData,
+  IN  UINTN   FileSize
+  )
+{
+  UINTN       InnerLoopIndex;
+  UINTN       OuterLoopIndex;
+  UINTN       Current;
+  UINTN       Next;
+  CHAR8       *VarDelimiter[2];
+  EFI_STATUS  Status;
+
+  VarDelimiter[0] = "=";
+  VarDelimiter[1] = "\"";
+  Status          = EFI_SUCCESS;
+
+  //Initialize to NULL
+  for (OuterLoopIndex = 0; OuterLoopIndex < MAX_VAR; OuterLoopIndex++) {
+      VarResult[OuterLoopIndex][0] = VarResult[OuterLoopIndex][1] = NULL;
+  }
+
+  for (OuterLoopIndex = 0, Next=0;
+    OuterLoopIndex < MAX_VAR && Next < FileSize;
+    OuterLoopIndex++) {
+    for (InnerLoopIndex = 0; InnerLoopIndex < 2; InnerLoopIndex++) {
+      Current = Next;
+      Next += StrSpn (&FileData[Next], VarDelimiter[InnerLoopIndex]);
+      FileData[Next] = '\0';
+      if (VarResult[OuterLoopIndex][InnerLoopIndex]) {
+        FreePool (VarResult[OuterLoopIndex][InnerLoopIndex]);
+      }
+      VarResult[OuterLoopIndex][InnerLoopIndex] = \
+        ALLOCATE_STRING_MEM (AsciiStrLen (&FileData[Current]));
+      AsciiStrToUnicodeStr (&FileData[Current], \
+        VarResult[OuterLoopIndex][InnerLoopIndex]);
+      //skip new line
+      Next += 2;
+    }
+  }
+
+  return Status;
+}
+
+STATIC
+EFI_STATUS
+InitRdkVariables (
+  VOID
+  )
+{
+  EFI_STATUS    Status;
+  UINTN         RdkSize;
+  UINT8         *RdkData;
+  CHAR16        *Result;
+  CONST CHAR16  *DevPath;
+  CONST CHAR16  *RdkFileName;
+
+  DevPath     = (CONST CHAR16 *)FixedPcdGetPtr (PcdRdkConfFileDevicePath);
+  RdkFileName = (CONST CHAR16 *)FixedPcdGetPtr (PcdRdkConfFileName);
+
+  Status = FindFileInDir (DevPath, RdkFileName, &Result);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "Failed to find file %s in %s\n", \
+      RdkFileName, DevPath));
+    return Status;
+  }
+
+  Status = RdkReadFile ((CONST CHAR16 *)Result, \
+    (VOID**)&RdkData, &RdkSize);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "Failed to read file %s\n", RdkFileName));
+    return Status;
+  }
+
+  Status = InitVarList ((CHAR8 *)RdkData, RdkSize);
+  return Status;
+}
+
+STATIC
+EFI_STATUS
+GetVarValue (
+  IN  CONST CHAR16 *Name,
+  OUT CONST CHAR16 **Value
+  )
+{
+  UINTN         Count;
+  EFI_STATUS    Status;
+
+  if (!VarablesInitialzed) {
+    Status = InitRdkVariables ();
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+
+    VarablesInitialzed = 1;
+  }
+
+  //Initialize to NULL
+  *Value = NULL;
+
+  for (Count = 0; Count < MAX_VAR; Count++) {
+    if (VarResult[Count][0] != NULL &&
+      StrCmp (Name, VarResult[Count][0]) == 0) {
+      *Value = VarResult[Count][1];
+      return EFI_SUCCESS;
+    }
+  }
+
+  return EFI_NOT_FOUND;
+}
+
+EFI_STATUS
+GetRdkVariable (
+  IN  CONST CHAR16  *Name,
+  OUT CONST CHAR16  **Value
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = GetVarValue (Name, Value);
+  return Status;
+}
+
+EFI_STATUS
+RdkReadFile (
+    IN      CONST CHAR16  *Path,
+    IN OUT  VOID          **BufferPtr,
+    OUT     UINTN         *FileSize
+)
+{
+  UINTN             BufferSize;
+  UINT64            SourceFileSize;
+  VOID              *Buffer;
+  EFI_STATUS        Status;
+  EFI_FILE_HANDLE   FileHandle;
+
+  Status = GetFileHandler (&FileHandle, Path, EFI_FILE_MODE_READ);
+  ASSERT_EFI_ERROR (Status);
+
+  Buffer = NULL;
+
+  // Get the file size
+  Status = FileHandle->SetPosition (FileHandle, (UINT64) -1);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  Status = FileHandle->GetPosition (FileHandle, &SourceFileSize);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  Status = FileHandle->SetPosition (FileHandle, 0);
+  if (EFI_ERROR (Status)) {
+    goto Exit;
+  }
+
+  BufferSize = (UINTN)SourceFileSize;
+  Buffer =  AllocateZeroPool (BufferSize);
+  if (Buffer == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  if (FileSize != NULL) *FileSize  = BufferSize;
+
+  Status = FileHandle->Read (FileHandle, &BufferSize, Buffer);
+  if (EFI_ERROR (Status) || BufferSize != SourceFileSize) {
+    FreePool (Buffer);
+    Buffer = NULL;
+    Status = EFI_BAD_BUFFER_SIZE;
+    goto Exit;
+  }
+
+Exit:
+  *BufferPtr = Buffer;
+  return Status;
+}
+
+EFI_STATUS
+RdkWriteFile (
+  IN      CONST CHAR16    *Path,
+  IN OUT  VOID            **BufferPtr,
+  OUT     UINTN           *FileSize
+)
+{
+  EFI_STATUS        Status;
+  EFI_FILE_HANDLE   FileHandle;
+
+  if (FileSize == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = GetFileHandler (&FileHandle, Path, \
+    EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE|EFI_FILE_MODE_CREATE);
+  ASSERT_EFI_ERROR (Status);
+
+  Status = FileHandle->Write (FileHandle, FileSize, *BufferPtr);
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
diff --git a/Platform/Comcast/Library/RdkBootManagerLib/SecureBoot.c b/Platform/Comcast/Library/RdkBootManagerLib/SecureBoot.c
new file mode 100644
index 000000000000..391c648da294
--- /dev/null
+++ b/Platform/Comcast/Library/RdkBootManagerLib/SecureBoot.c
@@ -0,0 +1,523 @@
+/*
+#  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
+#
+#  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 <RdkBootManagerLib.h>
+
+typedef enum KEY
+{
+  PK_KEY=1,
+  KEK_KEY,
+  DB_KEY,
+  DBX_KEY
+} eKey;
+/* ************************** */
+
+STATIC
+EFI_STATUS
+OpenFileByDevicePath(
+  IN OUT  EFI_DEVICE_PATH_PROTOCOL  **FilePath,
+  OUT     EFI_FILE_HANDLE           *FileHandle,
+  IN      UINT64                    OpenMode,
+  IN      UINT64                    Attributes
+)
+{
+  EFI_STATUS                        Status;
+  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *EfiSimpleFileSystemProtocol;
+  EFI_FILE_PROTOCOL                 *Handle1;
+  EFI_FILE_PROTOCOL                 *Handle2;
+  EFI_HANDLE                        DeviceHandle;
+
+  if (FilePath == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = gBS->LocateDevicePath (
+    &gEfiSimpleFileSystemProtocolGuid,
+    FilePath,
+    &DeviceHandle
+    );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = gBS->OpenProtocol (
+    DeviceHandle,
+    &gEfiSimpleFileSystemProtocolGuid,
+    (VOID**)&EfiSimpleFileSystemProtocol,
+    gImageHandle,
+    NULL,
+    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+    );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = EfiSimpleFileSystemProtocol->OpenVolume (\
+    EfiSimpleFileSystemProtocol, &Handle1);
+  if (EFI_ERROR (Status)) {
+    FileHandle = NULL;
+    return Status;
+  }
+
+  //
+  // go down directories one node at a time.
+  //
+  while (!IsDevicePathEnd (*FilePath)) {
+    //
+    // For file system access each node should be a file path component
+    //
+    if (DevicePathType (*FilePath) != MEDIA_DEVICE_PATH ||
+      DevicePathSubType (*FilePath) != MEDIA_FILEPATH_DP
+      ) {
+      FileHandle = NULL;
+      return (EFI_INVALID_PARAMETER);
+    }
+    //
+    // Open this file path node
+    //
+    Handle2  = Handle1;
+    Handle1 = NULL;
+
+    //
+    // Try to test opening an existing file
+    //
+    Status = Handle2->Open (
+      Handle2,
+      &Handle1,
+      ((FILEPATH_DEVICE_PATH*)*FilePath)->PathName,
+      OpenMode &~EFI_FILE_MODE_CREATE,
+      0
+      );
+
+    //
+    // see if the error was that it needs to be created
+    //
+    if ((EFI_ERROR (Status)) &&
+      (OpenMode != (OpenMode &~EFI_FILE_MODE_CREATE))) {
+      Status = Handle2->Open (
+      Handle2,
+      &Handle1,
+      ((FILEPATH_DEVICE_PATH*)*FilePath)->PathName,
+      OpenMode,
+      Attributes
+      );
+    }
+    //
+    // Close the last node
+    //
+    Handle2->Close (Handle2);
+
+    if (EFI_ERROR (Status)) {
+        return (Status);
+    }
+
+    //
+    // Get the next node
+    //
+    *FilePath = NextDevicePathNode (*FilePath);
+  }
+
+  //
+  // This is a weak spot since if the undefined
+  // SHELL_FILE_HANDLE format changes this must change also!
+  //
+  *FileHandle = (VOID*)Handle1;
+
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+GetFileHandler (
+  OUT EFI_FILE_HANDLE *FileHandle,
+  IN  CONST CHAR16    *Path,
+  IN  UINT64          OpenMode
+)
+{
+  EFI_STATUS                          Status;
+  EFI_DEVICE_PATH_PROTOCOL            *KeyFileDevicePath;
+  EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL  *DevicePathFromTextProtocol;
+
+  Status        = EFI_SUCCESS;
+  KeyFileDevicePath   = NULL;
+
+  Status = gBS->LocateProtocol (
+               &gEfiDevicePathFromTextProtocolGuid,
+               NULL,
+               (VOID**)&DevicePathFromTextProtocol
+           );
+  ASSERT_EFI_ERROR (Status);
+
+  KeyFileDevicePath = DevicePathFromTextProtocol->ConvertTextToDevicePath (Path);
+  if (KeyFileDevicePath != NULL)
+  {
+    Status = OpenFileByDevicePath (&KeyFileDevicePath, FileHandle, OpenMode, 0);
+    if (Status != EFI_SUCCESS)
+    {
+      DEBUG ((DEBUG_ERROR, "Getting FileHandle of %s Failed\n",Path));
+    }
+  }
+  return Status;
+}
+
+STATIC
+EFI_STATUS
+CreateTimeBasedPayload (
+  IN OUT UINTN  *DataSize,
+  IN OUT UINT8  **Data
+)
+{
+  EFI_STATUS                       Status;
+  UINT8                            *NewData;
+  UINT8                            *Payload;
+  UINTN                            PayloadSize;
+  EFI_VARIABLE_AUTHENTICATION_2    *DescriptorData;
+  UINTN                            DescriptorSize;
+  EFI_TIME                         Time;
+
+  if (Data == NULL || DataSize == NULL) {
+      return EFI_INVALID_PARAMETER;
+  }
+
+  //
+  // In Setup mode or Custom mode, the variable does not need to be signed but the
+  // parameters to the SetVariable() call still need to be prepared as authenticated
+  // variable. So we create EFI_VARIABLE_AUTHENTICATED_2 descriptor without certificate
+  // data in it.
+  //
+
+  Payload     = *Data;
+  PayloadSize = *DataSize;
+
+  DescriptorSize = OFFSET_OF (EFI_VARIABLE_AUTHENTICATION_2, AuthInfo) + \
+    OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData);
+  NewData = (UINT8*) AllocateZeroPool (DescriptorSize + PayloadSize);
+  if (NewData == NULL) {
+      return EFI_OUT_OF_RESOURCES;
+  }
+
+  if ((Payload != NULL) && (PayloadSize != 0)) {
+      CopyMem (NewData + DescriptorSize, Payload, PayloadSize);
+  }
+
+  DescriptorData = (EFI_VARIABLE_AUTHENTICATION_2 *) (NewData);
+
+  ZeroMem (&Time, sizeof (EFI_TIME));
+  Status = gRT->GetTime (&Time, NULL);
+  if (EFI_ERROR (Status)) {
+    FreePool(NewData);
+    return Status;
+  }
+  Time.Pad1       = 0;
+  Time.Nanosecond = 0;
+  Time.TimeZone   = 0;
+  Time.Daylight   = 0;
+  Time.Pad2       = 0;
+  CopyMem (&DescriptorData->TimeStamp, &Time, sizeof (EFI_TIME));
+
+  DescriptorData->AuthInfo.Hdr.dwLength         = \
+    OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData);
+  DescriptorData->AuthInfo.Hdr.wRevision        = 0x0200;
+  DescriptorData->AuthInfo.Hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID;
+  CopyGuid (&DescriptorData->AuthInfo.CertType, &gEfiCertPkcs7Guid);
+
+  if (Payload != NULL) {
+    FreePool(Payload);
+  }
+
+  *DataSize = DescriptorSize + PayloadSize;
+  *Data     = NewData;
+  return EFI_SUCCESS;
+}
+
+STATIC
+EFI_STATUS
+SetBootMode (
+  IN UINT8  SecureBootMode
+)
+{
+  return gRT->SetVariable (
+    EFI_CUSTOM_MODE_NAME,
+    &gEfiCustomModeEnableGuid,
+    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+    sizeof (UINT8),
+    &SecureBootMode
+  );
+}
+
+STATIC
+EFI_STATUS
+SetVariable (
+  IN EFI_SIGNATURE_LIST *PkCert,
+  IN UINTN              DataSize,
+  IN eKey               KeyType
+)
+{
+  UINT32       Attr;
+  EFI_STATUS   Status;
+
+  Status = EFI_SUCCESS;
+  Attr = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS |
+    EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS;
+  if (KeyType == PK_KEY)
+  {
+    DEBUG ((DEBUG_INFO, "Setting PK Key\n"));
+    Status = gRT->SetVariable (
+      EFI_PLATFORM_KEY_NAME,
+      &gEfiGlobalVariableGuid,
+      Attr,
+      DataSize,
+      PkCert
+    );
+  }
+  else if (KeyType == KEK_KEY)
+  {
+    DEBUG ((DEBUG_INFO, "Setting KEK Key\n"));
+    Status = gRT->SetVariable (
+      EFI_KEY_EXCHANGE_KEY_NAME,
+      &gEfiGlobalVariableGuid,
+      Attr,
+      DataSize,
+      PkCert
+    );
+
+    Status = gRT->SetVariable (
+      EFI_IMAGE_SECURITY_DATABASE,
+      &gEfiImageSecurityDatabaseGuid,
+      Attr,
+      DataSize,
+      PkCert
+    );
+  }
+  else
+  {
+    ASSERT(FALSE);
+  }
+  return Status;
+}
+
+STATIC
+VOID
+PopulateCert (
+  OUT EFI_SIGNATURE_LIST  **Cert,
+  IN  UINTN               DataSize,
+  IN  UINT8               *Data
+)
+{
+  EFI_SIGNATURE_DATA  *CertData = NULL;
+
+  if ((*Cert) == NULL)
+  {
+    (*Cert) = (EFI_SIGNATURE_LIST*) AllocateZeroPool (sizeof (EFI_SIGNATURE_LIST)
+      + sizeof(EFI_SIGNATURE_DATA) - 1
+      + DataSize );
+
+    ASSERT ((*Cert) != NULL);
+  }
+  (*Cert)->SignatureListSize   = (UINT32) (sizeof (EFI_SIGNATURE_LIST)
+    + sizeof (EFI_SIGNATURE_DATA) - 1
+    + DataSize);
+  (*Cert)->SignatureSize       = (UINT32) (sizeof (EFI_SIGNATURE_DATA) - 1 + DataSize);
+  (*Cert)->SignatureHeaderSize = 0;
+  CopyGuid (&(*Cert)->SignatureType, &gEfiCertX509Guid);
+
+
+  CertData = (EFI_SIGNATURE_DATA*) ((UINTN)(*Cert) + \
+    sizeof(EFI_SIGNATURE_LIST) + (*Cert)->SignatureHeaderSize);
+  ASSERT (CertData != NULL);
+
+  CopyGuid (&CertData->SignatureOwner, &gEfiGlobalVariableGuid);
+  CopyMem (&CertData->SignatureData, Data, DataSize);
+}
+
+STATIC
+EFI_STATUS
+RegisterCert (
+  IN  UINT8   *KeyData,
+  IN  UINTN   KeySize,
+  IN  eKey    KeyType
+)
+{
+  EFI_STATUS          Status;
+  EFI_SIGNATURE_LIST  *Cert;
+
+  Cert = NULL;
+
+  Status = SetBootMode (CUSTOM_SECURE_BOOT_MODE);
+  ASSERT_EFI_ERROR (Status);
+
+  PopulateCert (&Cert, KeySize, KeyData);
+
+  KeySize = Cert->SignatureListSize;
+
+  Status = CreateTimeBasedPayload (&KeySize, (UINT8**) &Cert);
+  ASSERT_EFI_ERROR (Status);
+
+  Status = SetVariable (Cert, KeySize, KeyType);
+  return Status;
+}
+
+STATIC
+VOID
+RdkSetVariable (
+  VOID
+)
+{
+  CONST CHAR16	*KeyPath;
+  EFI_STATUS  	Status;
+  UINT8         *KekKey,    *PkKey,    *KekCrtData;
+  UINTN         KekKeySize, PkKeySize, KekCrtSize;
+  INT8*         SetupMode;
+  eKey          KeyType;
+
+  KeyPath    = NULL;
+  SetupMode  = NULL;
+  KekKey     = PkKey     = KekCrtData = NULL;
+  KekKeySize = PkKeySize = KekCrtSize = 0;
+
+  Status = GetRdkVariable (L"ROOTCERT", &KeyPath);
+
+  //set only if the Kek Crt file mentioned in the configuration file
+  if (KeyPath != NULL) {
+    Status = RdkReadFile (
+      KeyPath,
+      (VOID **)&KekCrtData,
+      &KekCrtSize
+      );
+    ASSERT_EFI_ERROR (Status);
+
+    Status = gRT->SetVariable (
+      L"RdkRootCertificate",
+      &gRdkGlobalVariableGuid,
+      EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+      KekCrtSize,
+      KekCrtData
+      );
+    ASSERT_EFI_ERROR (Status);
+
+    if (KekCrtData) FreePool (KekCrtData);
+  }
+
+  Status = GetRdkVariable (L"KEKCERT", &KeyPath);
+  ASSERT_EFI_ERROR (Status);
+
+  Status = RdkReadFile (
+    KeyPath,
+    (VOID **)&KekKey,
+    &KekKeySize
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  Status = GetRdkVariable (L"PKCERT", &KeyPath);
+  ASSERT_EFI_ERROR (Status);
+
+  Status = RdkReadFile (
+    KeyPath,
+    (VOID **)&PkKey,
+    &PkKeySize
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  KeyType = PK_KEY;
+  Status = RegisterCert (PkKey, PkKeySize, KeyType);
+  GetEfiGlobalVariable2 (L"SetupMode", (VOID**)&SetupMode, NULL);
+
+  if (*SetupMode == 0)
+  {
+    DEBUG ((DEBUG_INFO, "PK Key Got Registered. Now System in User Mode\n"));
+    KeyType = KEK_KEY;
+    Status = RegisterCert (KekKey, KekKeySize, KeyType);
+  }
+  else if(*SetupMode == 1)
+  {
+    DEBUG ((DEBUG_INFO, "System in Standard System Mode ::: Secure Boot Not enabled\n"));
+    ASSERT_EFI_ERROR (Status);
+  }
+
+  if ( PkKey ) FreePool (PkKey);
+  if ( KekKey ) FreePool (KekKey);
+}
+
+EFI_STATUS
+RdkSecureBoot (
+  EFI_HANDLE        ImageHandle,
+  EFI_BOOT_SERVICES *BootServices
+)
+{
+  UINTN                               ExitDataSize;
+  CHAR16                              *ExitData;
+  CHAR16                      	      LoadOption[128];
+  CONST CHAR8		              *CmdLine;
+  CHAR16	                      *ImagePath;
+  UINT8                               *FdtData;
+  CONST CHAR16                        *DtbPath;
+  EFI_STATUS                          Status;
+  EFI_HANDLE                          Handle;
+  EFI_DEVICE_PATH_PROTOCOL            *FilePath;
+  EFI_LOADED_IMAGE_PROTOCOL           *ImageInfo;
+  EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL  *DevicePathFromTextProtocol;
+
+  FilePath      = NULL;
+  ExitData      = NULL;
+  CmdLine	= (CONST CHAR8 *)FixedPcdGetPtr (PcdRdkCmdLineArgs);
+
+  if (FixedPcdGetBool (PcdDtbAvailable)) {
+    FdtData = NULL;
+    DtbPath = NULL;
+
+    Status = GetRdkVariable (L"DTB", &DtbPath);
+    ASSERT_EFI_ERROR (Status);
+
+    Status = RdkReadFile (DtbPath, (VOID**) &FdtData, NULL);
+    ASSERT_EFI_ERROR (Status);
+
+    Status = gBS->InstallConfigurationTable (&gFdtTableGuid,(VOID*)FdtData);
+    ASSERT_EFI_ERROR (Status);
+  }
+
+  RdkSetVariable ();
+
+  Status = GetRdkVariable (L"IMAGE", (CONST CHAR16**)&ImagePath);
+  ASSERT_EFI_ERROR (Status);
+
+  Status = gBS->LocateProtocol (
+    &gEfiDevicePathFromTextProtocolGuid,
+    NULL,
+    (VOID**)&DevicePathFromTextProtocol
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  FilePath = DevicePathFromTextProtocol->ConvertTextToDevicePath (ImagePath);
+  ASSERT(NULL != FilePath);
+
+  Status = BootServices->LoadImage (
+    TRUE,
+    ImageHandle,
+    FilePath,
+    NULL,
+    0,
+    &Handle
+    );
+  ASSERT_EFI_ERROR (Status);
+
+  UnicodeSPrintAsciiFormat (LoadOption, sizeof (LoadOption), CmdLine);
+
+  Status = BootServices->HandleProtocol (\
+    Handle, &gEfiLoadedImageProtocolGuid, (VOID **)&ImageInfo);
+  ASSERT_EFI_ERROR (Status);
+  ImageInfo->LoadOptionsSize  = sizeof (LoadOption);
+  ImageInfo->LoadOptions      = LoadOption;
+
+  Status = BootServices->StartImage (Handle, &ExitDataSize, &ExitData);
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
-- 
2.15.0