[PATCH V2 08/50] MdeModulePkg/IniParsingLib: Add InitParsingLib instance.

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

This library is used to parse the INI configuration file.
The INI configuration file is used in EDKII capsule image to describe
the capsule information.

Detail format is documented in header file.

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: Liming Gao <liming.gao@intel.com>
---
 MdeModulePkg/Library/IniParsingLib/IniParsingLib.c   | 1424 ++++++++++++++++++++
 MdeModulePkg/Library/IniParsingLib/IniParsingLib.inf |   42 +
 MdeModulePkg/Library/IniParsingLib/IniParsingLib.uni |   22 +
 3 files changed, 1488 insertions(+)

diff --git a/MdeModulePkg/Library/IniParsingLib/IniParsingLib.c b/MdeModulePkg/Library/IniParsingLib/IniParsingLib.c
new file mode 100644
index 0000000..2e6b469
--- /dev/null
+++ b/MdeModulePkg/Library/IniParsingLib/IniParsingLib.c
@@ -0,0 +1,1424 @@
+/** @file
+  This library parses the INI configuration file.
+
+  The INI file format is:
+    ================
+    [SectionName]
+    EntryName=EntryValue
+    ================
+
+    Where:
+      1) SectionName is an ASCII string. The valid format is [A-Za-z0-9_]+
+      2) EntryName is an ASCII string. The valid format is [A-Za-z0-9_]+
+      3) EntryValue can be:
+         3.1) an ASCII String. The valid format is [A-Za-z0-9_]+
+         3.2) a GUID. The valid format is xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, where x is [A-Fa-f0-9]
+         3.3) a decimal value. The valid format is [0-9]+
+         3.4) a heximal value. The valid format is 0x[A-Fa-f0-9]+
+      4) '#' or ';' can be used as comment at anywhere.
+      5) TAB(0x20) or SPACE(0x9) can be used as separator.
+      6) LF(\n, 0xA) or CR(\r, 0xD) can be used as line break.
+
+  Caution: This module requires additional review when modified.
+  This driver will have external input - INI data file.
+
+  OpenIniFile(), PreProcessDataFile(), ProfileGetSection(), ProfileGetEntry()
+  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 <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+#define IS_HYPHEN(a)               ((a) == '-')
+#define IS_NULL(a)                 ((a) == '\0')
+
+// This is default allocation. Reallocation will happen if it is not enough.
+#define MAX_LINE_LENGTH           512
+
+typedef struct _SECTION_ITEM SECTION_ITEM;
+struct _SECTION_ITEM {
+  CHAR8                           *PtrSection;
+  UINTN                           SecNameLen;
+  CHAR8                           *PtrEntry;
+  CHAR8                           *PtrValue;
+  SECTION_ITEM                    *PtrNext;
+};
+
+typedef struct _COMMENT_LINE COMMENT_LINE;
+struct _COMMENT_LINE {
+  CHAR8                           *PtrComment;
+  COMMENT_LINE                    *PtrNext;
+};
+
+typedef struct {
+  SECTION_ITEM                  *SectionHead;
+  COMMENT_LINE                  *CommentHead;
+} INI_PARSING_LIB_CONTEXT;
+
+/**
+  Return if the digital char is valid.
+
+  @param DigitalChar    The digital char to be checked.
+  @param IncludeHex     If it include HEX char.
+
+  @retval TRUE   The digital char is valid.
+  @retval FALSE  The digital char is invalid.
+**/
+BOOLEAN
+IsValidDigitalChar(
+  IN CHAR8   DigitalChar,
+  IN BOOLEAN IncludeHex
+  )
+{
+  if (DigitalChar >= '0' && DigitalChar <= '9') {
+    return TRUE;
+  }
+  if (IncludeHex) {
+    if (DigitalChar >= 'a' && DigitalChar <= 'f') {
+      return TRUE;
+    }
+    if (DigitalChar >= 'A' && DigitalChar <= 'F') {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
+/**
+  Return if the name char is valid.
+
+  @param NameChar    The name char to be checked.
+
+  @retval TRUE   The name char is valid.
+  @retval FALSE  The name char is invalid.
+**/
+BOOLEAN
+IsValidNameChar(
+  IN CHAR8  NameChar
+  )
+{
+  if (NameChar >= 'a' && NameChar <= 'z') {
+    return TRUE;
+  }
+  if (NameChar >= 'A' && NameChar <= 'Z') {
+    return TRUE;
+  }
+  if (NameChar >= '0' && NameChar <= '9') {
+    return TRUE;
+  }
+  if (NameChar == '_') {
+    return TRUE;
+  }
+  return FALSE;
+}
+
+/**
+  Return if the digital string is valid.
+
+  @param Digital        The digital to be checked.
+  @param Length         The length of digital string in bytes.
+  @param IncludeHex     If it include HEX char.
+
+  @retval TRUE   The digital string is valid.
+  @retval FALSE  The digital string is invalid.
+**/
+BOOLEAN
+IsValidDigital(
+  IN CHAR8    *Digital,
+  IN UINTN    Length,
+  IN BOOLEAN  IncludeHex
+  )
+{
+  UINTN  Index;
+  for (Index = 0; Index < Length; Index++) {
+    if (!IsValidDigitalChar(Digital[Index], IncludeHex)) {
+      return FALSE;
+    }
+  }
+  return TRUE;
+}
+
+/**
+  Return if the decimal string is valid.
+
+  @param Decimal The decimal string to be checked.
+  @param Length  The length of decimal string in bytes.
+
+  @retval TRUE   The decimal string is valid.
+  @retval FALSE  The decimal string is invalid.
+**/
+BOOLEAN
+IsValidDecimalString(
+  IN CHAR8  *Decimal,
+  IN UINTN  Length
+  )
+{
+  return IsValidDigital(Decimal, Length, FALSE);
+}
+
+/**
+  Return if the heximal string is valid.
+
+  @param Hex     The heximal string to be checked.
+  @param Length  The length of heximal string in bytes.
+
+  @retval TRUE   The heximal string is valid.
+  @retval FALSE  The heximal string is invalid.
+**/
+BOOLEAN
+IsValidHexString(
+  IN CHAR8  *Hex,
+  IN UINTN  Length
+  )
+{
+  if (Length <= 2) {
+    return FALSE;
+  }
+  if (Hex[0] != '0') {
+    return FALSE;
+  }
+  if (Hex[1] != 'x' && Hex[1] != 'X') {
+    return FALSE;
+  }
+  return IsValidDigital(&Hex[2], Length - 2, TRUE);
+}
+
+/**
+  Return if the name string is valid.
+
+  @param Name    The name to be checked.
+  @param Length  The length of name string in bytes.
+
+  @retval TRUE   The name string is valid.
+  @retval FALSE  The name string is invalid.
+**/
+BOOLEAN
+IsValidName(
+  IN CHAR8  *Name,
+  IN UINTN  Length
+  )
+{
+  UINTN  Index;
+  for (Index = 0; Index < Length; Index++) {
+    if (!IsValidNameChar(Name[Index])) {
+      return FALSE;
+    }
+  }
+  return TRUE;
+}
+
+/**
+  Return if the value string is valid GUID.
+
+  @param Value   The value to be checked.
+  @param Length  The length of value string in bytes.
+
+  @retval TRUE   The value string is valid GUID.
+  @retval FALSE  The value string is invalid GUID.
+**/
+BOOLEAN
+IsValidGuid(
+  IN CHAR8  *Value,
+  IN UINTN  Length
+  )
+{
+  if (Length != sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx") - 1) {
+    return FALSE;
+  }
+  if (!IS_HYPHEN(Value[8])) {
+    return FALSE;
+  }
+  if (!IS_HYPHEN(Value[13])) {
+    return FALSE;
+  }
+  if (!IS_HYPHEN(Value[18])) {
+    return FALSE;
+  }
+  if (!IS_HYPHEN(Value[23])) {
+    return FALSE;
+  }
+  if (!IsValidDigital(&Value[0], 8, TRUE)) {
+    return FALSE;
+  }
+  if (!IsValidDigital(&Value[9], 4, TRUE)) {
+    return FALSE;
+  }
+  if (!IsValidDigital(&Value[14], 4, TRUE)) {
+    return FALSE;
+  }
+  if (!IsValidDigital(&Value[19], 4, TRUE)) {
+    return FALSE;
+  }
+  if (!IsValidDigital(&Value[24], 12, TRUE)) {
+    return FALSE;
+  }
+  return TRUE;
+}
+
+/**
+  Return if the value string is valid.
+
+  @param Value    The value to be checked.
+  @param Length  The length of value string in bytes.
+
+  @retval TRUE   The name string is valid.
+  @retval FALSE  The name string is invalid.
+**/
+BOOLEAN
+IsValidValue(
+  IN CHAR8  *Value,
+  IN UINTN  Length
+  )
+{
+  if (IsValidName(Value, Length) || IsValidGuid(Value, Length)) {
+    return TRUE;
+  }
+  return FALSE;
+}
+
+/**
+  Dump an INI config file context.
+
+  @param Context         INI Config file context.
+**/
+VOID
+DumpIniSection(
+  IN VOID *Context
+  )
+{
+  INI_PARSING_LIB_CONTEXT               *IniContext;
+  SECTION_ITEM                          *PtrSection;
+  SECTION_ITEM                          *Section;
+  COMMENT_LINE                          *Comment;
+
+  if (Context == NULL) {
+    return;
+  }
+
+  IniContext = Context;
+  Section = IniContext->SectionHead;
+  Comment = IniContext->CommentHead;
+
+  while (Section != NULL) {
+    PtrSection = Section;
+    Section = Section->PtrNext;
+    if (PtrSection->PtrSection != NULL) {
+      DEBUG((EFI_D_VERBOSE, "Section - %a\n", PtrSection->PtrSection));
+    }
+    if (PtrSection->PtrEntry != NULL) {
+      DEBUG ((EFI_D_VERBOSE, "  Entry - %a\n", PtrSection->PtrEntry));
+    }
+    if (PtrSection->PtrValue != NULL) {
+      DEBUG((EFI_D_VERBOSE, "  Value - %a\n", PtrSection->PtrValue));
+    }
+  }
+}
+
+/**
+  Copy one line data from buffer data to the line buffer.
+
+  @param Buffer          Buffer data.
+  @param BufferSize      Buffer Size.
+  @param LineBuffer      Line buffer to store the found line data.
+  @param LineSize        On input, size of the input line buffer.
+                         On output, size of the actual line buffer.
+
+  @retval EFI_BUFFER_TOO_SMALL  The size of input line buffer is not enough.
+  @retval EFI_SUCCESS           Copy line data into the line buffer.
+
+**/
+EFI_STATUS
+ProfileGetLine (
+  IN      UINT8                         *Buffer,
+  IN      UINTN                         BufferSize,
+  IN OUT  UINT8                         *LineBuffer,
+  IN OUT  UINTN                         *LineSize
+  )
+{
+  UINTN                                 Length;
+  UINT8                                 *PtrBuf;
+  UINTN                                 PtrEnd;
+
+  PtrBuf      = Buffer;
+  PtrEnd      = (UINTN)Buffer + BufferSize;
+
+  //
+  // 0x0D indicates a line break. Otherwise there is no line break
+  //
+  while ((UINTN)PtrBuf < PtrEnd) {
+    if (*PtrBuf == 0x0D || *PtrBuf == 0x0A) {
+      break;
+    }
+    PtrBuf++;
+  }
+
+  if ((UINTN)PtrBuf >= (PtrEnd - 1)) {
+    //
+    // The buffer ends without any line break
+    // or it is the last character of the buffer
+    //
+    Length    = BufferSize;
+  } else if (*(PtrBuf + 1) == 0x0A) {
+    //
+    // Further check if a 0x0A follows. If yes, count 0xA
+    //
+    Length    = (UINTN) PtrBuf - (UINTN) Buffer + 2;
+  } else {
+    Length    = (UINTN) PtrBuf - (UINTN) Buffer + 1;
+  }
+
+  if (Length > (*LineSize)) {
+    *LineSize = Length;
+    return EFI_BUFFER_TOO_SMALL;
+  }
+
+  SetMem (LineBuffer, *LineSize, 0x0);
+  *LineSize   = Length;
+  CopyMem (LineBuffer, Buffer, Length);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Trim Buffer by removing all CR, LF, TAB, and SPACE chars in its head and tail.
+
+  @param Buffer          On input,  buffer data to be trimed.
+                         On output, the trimmed buffer.
+  @param BufferSize      On input,  size of original buffer data.
+                         On output, size of the trimmed buffer.
+
+**/
+VOID
+ProfileTrim (
+  IN OUT  UINT8                         *Buffer,
+  IN OUT  UINTN                         *BufferSize
+  )
+{
+  UINTN                                 Length;
+  UINT8                                 *PtrBuf;
+  UINT8                                 *PtrEnd;
+
+  if (*BufferSize == 0) {
+    return;
+  }
+
+  //
+  // Trim the tail first, include CR, LF, TAB, and SPACE.
+  //
+  Length          = *BufferSize;
+  PtrBuf          = (UINT8 *) ((UINTN) Buffer + Length - 1);
+  while (PtrBuf >= Buffer) {
+    if ((*PtrBuf != 0x0D) && (*PtrBuf != 0x0A )
+      && (*PtrBuf != 0x20) && (*PtrBuf != 0x09)) {
+      break;
+    }
+    PtrBuf --;
+  }
+
+  //
+  // all spaces, a blank line, return directly;
+  //
+  if (PtrBuf < Buffer) {
+    *BufferSize   = 0;
+    return;
+  }
+
+  Length          = (UINTN)PtrBuf - (UINTN)Buffer + 1;
+  PtrEnd          = PtrBuf;
+  PtrBuf          = Buffer;
+
+  //
+  // Now skip the heading CR, LF, TAB and SPACE
+  //
+  while (PtrBuf <= PtrEnd) {
+    if ((*PtrBuf != 0x0D) && (*PtrBuf != 0x0A )
+      && (*PtrBuf != 0x20) && (*PtrBuf != 0x09)) {
+      break;
+    }
+    PtrBuf++;
+  }
+
+  //
+  // If no heading CR, LF, TAB or SPACE, directly return
+  //
+  if (PtrBuf == Buffer) {
+    *BufferSize   = Length;
+    return;
+  }
+
+  *BufferSize     = (UINTN)PtrEnd - (UINTN)PtrBuf + 1;
+
+  //
+  // The first Buffer..PtrBuf characters are CR, LF, TAB or SPACE.
+  // Now move out all these characters.
+  //
+  while (PtrBuf <= PtrEnd) {
+    *Buffer       = *PtrBuf;
+    Buffer++;
+    PtrBuf++;
+  }
+
+  return;
+}
+
+/**
+  Insert new comment item into comment head.
+
+  @param Buffer          Comment buffer to be added.
+  @param BufferSize      Size of comment buffer.
+  @param CommentHead     Comment Item head entry.
+
+  @retval EFI_OUT_OF_RESOURCES   No enough memory is allocated.
+  @retval EFI_SUCCESS            New comment item is inserted.
+
+**/
+EFI_STATUS
+ProfileGetComments (
+  IN      UINT8                         *Buffer,
+  IN      UINTN                         BufferSize,
+  IN OUT  COMMENT_LINE                  **CommentHead
+  )
+{
+  COMMENT_LINE                          *CommentItem;
+
+  CommentItem = NULL;
+  CommentItem = AllocatePool (sizeof (COMMENT_LINE));
+  if (CommentItem == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  CommentItem->PtrNext  = *CommentHead;
+  *CommentHead          = CommentItem;
+
+  //
+  // Add a trailing '\0'
+  //
+  CommentItem->PtrComment = AllocatePool (BufferSize + 1);
+  if (CommentItem->PtrComment == NULL) {
+    FreePool (CommentItem);
+    return EFI_OUT_OF_RESOURCES;
+  }
+  CopyMem (CommentItem->PtrComment, Buffer, BufferSize);
+  *(CommentItem->PtrComment + BufferSize) = '\0';
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Add new section item into Section head.
+
+  @param Buffer          Section item data buffer.
+  @param BufferSize      Size of section item.
+  @param SectionHead     Section item head entry.
+
+  @retval EFI_OUT_OF_RESOURCES   No enough memory is allocated.
+  @retval EFI_SUCCESS            Section item is NULL or Section item is added.
+
+**/
+EFI_STATUS
+ProfileGetSection (
+  IN      UINT8                         *Buffer,
+  IN      UINTN                         BufferSize,
+  IN OUT  SECTION_ITEM                  **SectionHead
+  )
+{
+  EFI_STATUS                            Status;
+  SECTION_ITEM                          *SectionItem;
+  UINTN                                 Length;
+  UINT8                                 *PtrBuf;
+  UINT8                                 *PtrEnd;
+
+  Status      = EFI_SUCCESS;
+  ASSERT(BufferSize >= 1);
+  //
+  // The first character of Buffer is '[', now we want for ']'
+  //
+  PtrEnd      = (UINT8 *)((UINTN)Buffer + BufferSize - 1);
+  PtrBuf      = (UINT8 *)((UINTN)Buffer + 1);
+  while (PtrBuf <= PtrEnd) {
+    if (*PtrBuf == ']') {
+      break;
+    }
+    PtrBuf ++;
+  }
+  if (PtrBuf > PtrEnd) {
+    //
+    // Not found. Invalid line
+    //
+    return EFI_NOT_FOUND;
+  }
+  if (PtrBuf <= Buffer + 1) {
+    // Empty name
+    return EFI_NOT_FOUND;
+  }
+
+  //
+  // excluding the heading '[' and tailing ']'
+  //
+  Length      = PtrBuf - Buffer - 1;
+  ProfileTrim (
+    Buffer + 1,
+    &Length
+  );
+
+  //
+  // Invalid line if the section name is null
+  //
+  if (Length == 0) {
+    return EFI_NOT_FOUND;
+  }
+
+  if (!IsValidName(Buffer + 1, Length)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  SectionItem = AllocatePool (sizeof (SECTION_ITEM));
+  if (SectionItem == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  SectionItem->PtrSection = NULL;
+  SectionItem->SecNameLen = Length;
+  SectionItem->PtrEntry   = NULL;
+  SectionItem->PtrValue   = NULL;
+  SectionItem->PtrNext    = *SectionHead;
+  *SectionHead            = SectionItem;
+
+  //
+  // Add a trailing '\0'
+  //
+  SectionItem->PtrSection = AllocatePool (Length + 1);
+  if (SectionItem->PtrSection == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  //
+  // excluding the heading '['
+  //
+  CopyMem (SectionItem->PtrSection, Buffer + 1, Length);
+  *(SectionItem->PtrSection + Length) = '\0';
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Add new section entry and entry value into Section head.
+
+  @param Buffer          Section entry data buffer.
+  @param BufferSize      Size of section entry.
+  @param SectionHead     Section item head entry.
+
+  @retval EFI_OUT_OF_RESOURCES   No enough memory is allocated.
+  @retval EFI_SUCCESS            Section entry is added.
+  @retval EFI_NOT_FOUND          Section entry is not found.
+  @retval EFI_INVALID_PARAMETER  Section entry is invalid.
+
+**/
+EFI_STATUS
+ProfileGetEntry (
+  IN      UINT8                         *Buffer,
+  IN      UINTN                         BufferSize,
+  IN OUT  SECTION_ITEM                  **SectionHead
+  )
+{
+  EFI_STATUS                            Status;
+  SECTION_ITEM                          *SectionItem;
+  SECTION_ITEM                          *PtrSection;
+  UINTN                                 Length;
+  UINT8                                 *PtrBuf;
+  UINT8                                 *PtrEnd;
+
+  Status      = EFI_SUCCESS;
+  PtrBuf      = Buffer;
+  PtrEnd      = (UINT8 *) ((UINTN)Buffer + BufferSize - 1);
+
+  //
+  // First search for '='
+  //
+  while (PtrBuf <= PtrEnd) {
+    if (*PtrBuf == '=') {
+      break;
+    }
+    PtrBuf++;
+  }
+  if (PtrBuf > PtrEnd) {
+    //
+    // Not found. Invalid line
+    //
+    return EFI_NOT_FOUND;
+  }
+  if (PtrBuf <= Buffer) {
+    // Empty name
+    return EFI_NOT_FOUND;
+  }
+
+  //
+  // excluding the tailing '='
+  //
+  Length      = PtrBuf - Buffer;
+  ProfileTrim (
+    Buffer,
+    &Length
+  );
+
+  //
+  // Invalid line if the entry name is null
+  //
+  if (Length == 0) {
+    return EFI_NOT_FOUND;
+  }
+
+  if (!IsValidName(Buffer, Length)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  //
+  // Omit this line if no section header has been found before
+  //
+  if (*SectionHead == NULL) {
+    return Status;
+  }
+  PtrSection  = *SectionHead;
+
+  SectionItem = AllocatePool (sizeof (SECTION_ITEM));
+  if (SectionItem == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  SectionItem->PtrSection = NULL;
+  SectionItem->PtrEntry   = NULL;
+  SectionItem->PtrValue   = NULL;
+  SectionItem->SecNameLen = PtrSection->SecNameLen;
+  SectionItem->PtrNext    = *SectionHead;
+  *SectionHead            = SectionItem;
+
+  //
+  // SectionName, add a trailing '\0'
+  //
+  SectionItem->PtrSection = AllocatePool (PtrSection->SecNameLen + 1);
+  if (SectionItem->PtrSection == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+  CopyMem (SectionItem->PtrSection, PtrSection->PtrSection, PtrSection->SecNameLen + 1);
+
+  //
+  // EntryName, add a trailing '\0'
+  //
+  SectionItem->PtrEntry = AllocatePool (Length + 1);
+  if (SectionItem->PtrEntry == NULL) {
+    FreePool(SectionItem->PtrSection);
+    return EFI_OUT_OF_RESOURCES;
+  }
+  CopyMem (SectionItem->PtrEntry, Buffer, Length);
+  *(SectionItem->PtrEntry + Length) = '\0';
+
+  //
+  // Next search for '#' or ';'
+  //
+  PtrBuf      = PtrBuf + 1;
+  Buffer      = PtrBuf;
+  while (PtrBuf <= PtrEnd) {
+    if (*PtrBuf == '#' || *PtrBuf == ';') {
+      break;
+    }
+    PtrBuf++;
+  }
+  if (PtrBuf <= Buffer) {
+    // Empty name
+    FreePool(SectionItem->PtrEntry);
+    FreePool(SectionItem->PtrSection);
+    return EFI_NOT_FOUND;
+  }
+  Length      = PtrBuf - Buffer;
+  ProfileTrim (
+    Buffer,
+    &Length
+  );
+
+  //
+  // Invalid line if the entry value is null
+  //
+  if (Length == 0) {
+    FreePool(SectionItem->PtrEntry);
+    FreePool(SectionItem->PtrSection);
+    return EFI_NOT_FOUND;
+  }
+
+  if (!IsValidValue(Buffer, Length)) {
+    FreePool(SectionItem->PtrEntry);
+    FreePool(SectionItem->PtrSection);
+    return EFI_INVALID_PARAMETER;
+  }
+
+  //
+  // EntryValue, add a trailing '\0'
+  //
+  SectionItem->PtrValue = AllocatePool (Length + 1);
+  if (SectionItem->PtrValue == NULL) {
+    FreePool(SectionItem->PtrEntry);
+    FreePool(SectionItem->PtrSection);
+    return EFI_OUT_OF_RESOURCES;
+  }
+  CopyMem (SectionItem->PtrValue, Buffer, Length);
+  *(SectionItem->PtrValue + Length) = '\0';
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Free all comment entry and section entry.
+
+  @param Section         Section entry list.
+  @param Comment         Comment entry list.
+
+**/
+VOID
+FreeAllList (
+  IN      SECTION_ITEM                  *Section,
+  IN      COMMENT_LINE                  *Comment
+  )
+{
+  SECTION_ITEM                          *PtrSection;
+  COMMENT_LINE                          *PtrComment;
+
+  while (Section != NULL) {
+    PtrSection    = Section;
+    Section       = Section->PtrNext;
+    if (PtrSection->PtrEntry != NULL) {
+      FreePool (PtrSection->PtrEntry);
+    }
+    if (PtrSection->PtrSection != NULL) {
+      FreePool (PtrSection->PtrSection);
+    }
+    if (PtrSection->PtrValue != NULL) {
+      FreePool (PtrSection->PtrValue);
+    }
+    FreePool (PtrSection);
+  }
+
+  while (Comment != NULL) {
+    PtrComment    = Comment;
+    Comment       = Comment->PtrNext;
+    if (PtrComment->PtrComment != NULL) {
+      FreePool (PtrComment->PtrComment);
+    }
+    FreePool (PtrComment);
+  }
+
+  return;
+}
+
+/**
+  Get section entry value.
+
+  @param Section         Section entry list.
+  @param SectionName     Section name.
+  @param EntryName       Section entry name.
+  @param EntryValue      Point to the got entry value.
+
+  @retval EFI_NOT_FOUND  Section is not found.
+  @retval EFI_SUCCESS    Section entry value is got.
+
+**/
+EFI_STATUS
+UpdateGetProfileString (
+  IN      SECTION_ITEM                  *Section,
+  IN      CHAR8                         *SectionName,
+  IN      CHAR8                         *EntryName,
+  OUT     CHAR8                         **EntryValue
+  )
+{
+  *EntryValue   = NULL;
+
+  while (Section != NULL) {
+    if (AsciiStrCmp ((CONST CHAR8 *) Section->PtrSection, (CONST CHAR8 *) SectionName) == 0) {
+      if (Section->PtrEntry != NULL) {
+        if (AsciiStrCmp ((CONST CHAR8 *) Section->PtrEntry, (CONST CHAR8 *) EntryName) == 0) {
+          break;
+        }
+      }
+    }
+    Section     = Section->PtrNext;
+  }
+
+  if (Section == NULL) {
+    return EFI_NOT_FOUND;
+  }
+
+  *EntryValue   = Section->PtrValue;
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Converts a list of string to a specified buffer.
+
+  @param Buf             The output buffer that contains the string.
+  @param BufferLength    The length of the buffer
+  @param Str             The input string that contains the hex number
+
+  @retval EFI_SUCCESS    The string was successfully converted to the buffer.
+
+**/
+EFI_STATUS
+AsciiStrToBuf (
+  OUT UINT8    *Buf,
+  IN  UINTN    BufferLength,
+  IN  CHAR8    *Str
+  )
+{
+  UINTN       Index;
+  UINTN       StrLength;
+  UINT8       Digit;
+  UINT8       Byte;
+
+  Digit = 0;
+
+  //
+  // Two hex char make up one byte
+  //
+  StrLength = BufferLength * sizeof (CHAR8);
+
+  for(Index = 0; Index < StrLength; Index++, Str++) {
+
+    if ((*Str >= 'a') && (*Str <= 'f')) {
+      Digit = (UINT8) (*Str - 'a' + 0x0A);
+    } else if ((*Str >= 'A') && (*Str <= 'F')) {
+      Digit = (UINT8) (*Str - 'A' + 0x0A);
+    } else if ((*Str >= '0') && (*Str <= '9')) {
+      Digit = (UINT8) (*Str - '0');
+    } else {
+      return EFI_INVALID_PARAMETER;
+    }
+
+    //
+    // For odd characters, write the upper nibble for each buffer byte,
+    // and for even characters, the lower nibble.
+    //
+    if ((Index & 1) == 0) {
+      Byte = (UINT8) (Digit << 4);
+    } else {
+      Byte = Buf[Index / 2];
+      Byte &= 0xF0;
+      Byte = (UINT8) (Byte | Digit);
+    }
+
+    Buf[Index / 2] = Byte;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Converts a string to GUID value.
+  Guid Format is xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+
+  @param Str              The registry format GUID string that contains the GUID value.
+  @param Guid             A pointer to the converted GUID value.
+
+  @retval EFI_SUCCESS     The GUID string was successfully converted to the GUID value.
+  @retval EFI_UNSUPPORTED The input string is not in registry format.
+  @return others          Some error occurred when converting part of GUID value.
+
+**/
+EFI_STATUS
+AsciiStrToGuid (
+  IN  CHAR8    *Str,
+  OUT EFI_GUID *Guid
+  )
+{
+  //
+  // Get the first UINT32 data
+  //
+  Guid->Data1 = (UINT32) AsciiStrHexToUint64  (Str);
+  while (!IS_HYPHEN (*Str) && !IS_NULL (*Str)) {
+    Str ++;
+  }
+
+  if (IS_HYPHEN (*Str)) {
+    Str++;
+  } else {
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Get the second UINT16 data
+  //
+  Guid->Data2 = (UINT16) AsciiStrHexToUint64  (Str);
+  while (!IS_HYPHEN (*Str) && !IS_NULL (*Str)) {
+    Str ++;
+  }
+
+  if (IS_HYPHEN (*Str)) {
+    Str++;
+  } else {
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Get the third UINT16 data
+  //
+  Guid->Data3 = (UINT16) AsciiStrHexToUint64  (Str);
+  while (!IS_HYPHEN (*Str) && !IS_NULL (*Str)) {
+    Str ++;
+  }
+
+  if (IS_HYPHEN (*Str)) {
+    Str++;
+  } else {
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Get the following 8 bytes data
+  //
+  AsciiStrToBuf (&Guid->Data4[0], 2, Str);
+  //
+  // Skip 2 byte hex chars
+  //
+  Str += 2 * 2;
+
+  if (IS_HYPHEN (*Str)) {
+    Str++;
+  } else {
+    return EFI_UNSUPPORTED;
+  }
+  AsciiStrToBuf (&Guid->Data4[2], 6, Str);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Pre process config data buffer into Section entry list and Comment entry list.
+
+  @param DataBuffer      Config raw file buffer.
+  @param BufferSize      Size of raw buffer.
+  @param SectionHead     Pointer to the section entry list.
+  @param CommentHead     Pointer to the comment entry list.
+
+  @retval EFI_OUT_OF_RESOURCES  No enough memory is allocated.
+  @retval EFI_SUCCESS           Config data buffer is preprocessed.
+  @retval EFI_NOT_FOUND         Config data buffer is invalid, because Section or Entry is not found.
+  @retval EFI_INVALID_PARAMETER Config data buffer is invalid, because Section or Entry is invalid.
+
+**/
+EFI_STATUS
+PreProcessDataFile (
+  IN      UINT8                         *DataBuffer,
+  IN      UINTN                         BufferSize,
+  IN OUT  SECTION_ITEM                  **SectionHead,
+  IN OUT  COMMENT_LINE                  **CommentHead
+  )
+{
+  EFI_STATUS                            Status;
+  CHAR8                                 *Source;
+  CHAR8                                 *CurrentPtr;
+  CHAR8                                 *BufferEnd;
+  CHAR8                                 *PtrLine;
+  UINTN                                 LineLength;
+  UINTN                                 SourceLength;
+  UINTN                                 MaxLineLength;
+
+  *SectionHead          = NULL;
+  *CommentHead          = NULL;
+  BufferEnd             = (CHAR8 *) ( (UINTN) DataBuffer + BufferSize);
+  CurrentPtr            = (CHAR8 *) DataBuffer;
+  MaxLineLength         = MAX_LINE_LENGTH;
+  Status                = EFI_SUCCESS;
+
+  PtrLine = AllocatePool (MaxLineLength);
+  if (PtrLine == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  while (CurrentPtr < BufferEnd) {
+    Source              = CurrentPtr;
+    SourceLength        = (UINTN)BufferEnd - (UINTN)CurrentPtr;
+    LineLength          = MaxLineLength;
+    //
+    // With the assumption that line length is less than 512
+    // characters. Otherwise BUFFER_TOO_SMALL will be returned.
+    //
+    Status              = ProfileGetLine (
+                            (UINT8 *) Source,
+                            SourceLength,
+                            (UINT8 *) PtrLine,
+                            &LineLength
+                            );
+    if (EFI_ERROR (Status)) {
+      if (Status == EFI_BUFFER_TOO_SMALL) {
+        //
+        // If buffer too small, re-allocate the buffer according
+        // to the returned LineLength and try again.
+        //
+        FreePool (PtrLine);
+        PtrLine         = NULL;
+        PtrLine = AllocatePool (LineLength);
+        if (PtrLine == NULL) {
+          Status        = EFI_OUT_OF_RESOURCES;
+          break;
+        }
+        SourceLength    = LineLength;
+        Status          = ProfileGetLine (
+                            (UINT8 *) Source,
+                            SourceLength,
+                            (UINT8 *) PtrLine,
+                            &LineLength
+                            );
+        if (EFI_ERROR (Status)) {
+          break;
+        }
+        MaxLineLength   = LineLength;
+      } else {
+        break;
+      }
+    }
+    CurrentPtr          = (CHAR8 *) ( (UINTN) CurrentPtr + LineLength);
+
+    //
+    // Line got. Trim the line before processing it.
+    //
+    ProfileTrim (
+      (UINT8 *) PtrLine,
+      &LineLength
+   );
+
+    //
+    // Blank line
+    //
+    if (LineLength == 0) {
+      continue;
+    }
+
+    if (PtrLine[0] == '#' || PtrLine[0] == ';') {
+      Status            = ProfileGetComments (
+                            (UINT8 *) PtrLine,
+                            LineLength,
+                            CommentHead
+                            );
+    } else if (PtrLine[0] == '[') {
+      Status            = ProfileGetSection (
+                            (UINT8 *) PtrLine,
+                            LineLength,
+                            SectionHead
+                            );
+    } else {
+      Status            = ProfileGetEntry (
+                            (UINT8 *) PtrLine,
+                            LineLength,
+                            SectionHead
+                            );
+    }
+
+    if (EFI_ERROR (Status)) {
+      break;
+    }
+  }
+
+  //
+  // Free buffer
+  //
+  FreePool (PtrLine);
+
+  return Status;
+}
+
+/**
+  Open an INI config file and return a context.
+
+  @param DataBuffer      Config raw file buffer.
+  @param BufferSize      Size of raw buffer.
+
+  @return       Config data buffer is opened and context is returned.
+  @retval NULL  No enough memory is allocated.
+  @retval NULL  Config data buffer is invalid.
+**/
+VOID *
+EFIAPI
+OpenIniFile (
+  IN      UINT8                         *DataBuffer,
+  IN      UINTN                         BufferSize
+  )
+{
+  EFI_STATUS                            Status;
+  INI_PARSING_LIB_CONTEXT               *IniContext;
+
+  if (DataBuffer == NULL || BufferSize == 0) {
+    return NULL;
+  }
+
+  IniContext = AllocateZeroPool(sizeof(INI_PARSING_LIB_CONTEXT));
+  if (IniContext == NULL) {
+    return NULL;
+  }
+
+  //
+  // First process the data buffer and get all sections and entries
+  //
+  Status = PreProcessDataFile (
+             DataBuffer,
+             BufferSize,
+             &IniContext->SectionHead,
+             &IniContext->CommentHead
+             );
+  if (EFI_ERROR(Status)) {
+    FreePool(IniContext);
+    return NULL;
+  }
+  DEBUG_CODE_BEGIN ();
+    DumpIniSection(IniContext);
+  DEBUG_CODE_END ();
+  return IniContext;
+}
+
+/**
+  Get section entry string value.
+
+  @param Context         INI Config file context.
+  @param SectionName     Section name.
+  @param EntryName       Section entry name.
+  @param EntryValue      Point to the got entry string value.
+
+  @retval EFI_SUCCESS    Section entry string value is got.
+  @retval EFI_NOT_FOUND  Section is not found.
+**/
+EFI_STATUS
+EFIAPI
+GetStringFromDataFile(
+  IN      VOID                          *Context,
+  IN      CHAR8                         *SectionName,
+  IN      CHAR8                         *EntryName,
+  OUT     CHAR8                         **EntryValue
+  )
+{
+  INI_PARSING_LIB_CONTEXT               *IniContext;
+  EFI_STATUS                            Status;
+
+  if (Context == NULL || SectionName == NULL || EntryName == NULL || EntryValue == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  IniContext = Context;
+
+  *EntryValue  = NULL;
+  Status = UpdateGetProfileString (
+             IniContext->SectionHead,
+             SectionName,
+             EntryName,
+             EntryValue
+             );
+  return Status;
+}
+
+/**
+  Get section entry GUID value.
+
+  @param Context         INI Config file context.
+  @param SectionName     Section name.
+  @param EntryName       Section entry name.
+  @param Guid            Point to the got GUID value.
+
+  @retval EFI_SUCCESS    Section entry GUID value is got.
+  @retval EFI_NOT_FOUND  Section is not found.
+**/
+EFI_STATUS
+EFIAPI
+GetGuidFromDataFile(
+  IN      VOID                          *Context,
+  IN      CHAR8                         *SectionName,
+  IN      CHAR8                         *EntryName,
+  OUT     EFI_GUID                      *Guid
+  )
+{
+  CHAR8                                 *Value;
+  EFI_STATUS                            Status;
+
+  if (Context == NULL || SectionName == NULL || EntryName == NULL || Guid == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = GetStringFromDataFile(
+             Context,
+             SectionName,
+             EntryName,
+             &Value
+             );
+  if (EFI_ERROR(Status)) {
+    return EFI_NOT_FOUND;
+  }
+  if (!IsValidGuid(Value, AsciiStrLen(Value))) {
+    return EFI_NOT_FOUND;
+  }
+  Status = AsciiStrToGuid(Value, Guid);
+  if (EFI_ERROR (Status)) {
+    return EFI_NOT_FOUND;
+  }
+  return EFI_SUCCESS;
+}
+
+/**
+  Get section entry decimal UINTN value.
+
+  @param Context         INI Config file context.
+  @param SectionName     Section name.
+  @param EntryName       Section entry name.
+  @param Data            Point to the got decimal UINTN value.
+
+  @retval EFI_SUCCESS    Section entry decimal UINTN value is got.
+  @retval EFI_NOT_FOUND  Section is not found.
+**/
+EFI_STATUS
+EFIAPI
+GetDecimalUintnFromDataFile(
+  IN      VOID                          *Context,
+  IN      CHAR8                         *SectionName,
+  IN      CHAR8                         *EntryName,
+  OUT     UINTN                         *Data
+  )
+{
+  CHAR8                                 *Value;
+  EFI_STATUS                            Status;
+
+  if (Context == NULL || SectionName == NULL || EntryName == NULL || Data == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = GetStringFromDataFile(
+             Context,
+             SectionName,
+             EntryName,
+             &Value
+             );
+  if (EFI_ERROR(Status)) {
+    return EFI_NOT_FOUND;
+  }
+  if (!IsValidDecimalString(Value, AsciiStrLen(Value))) {
+    return EFI_NOT_FOUND;
+  }
+  *Data = AsciiStrDecimalToUintn(Value);
+  return EFI_SUCCESS;
+}
+
+/**
+  Get section entry heximal UINTN value.
+
+  @param Context         INI Config file context.
+  @param SectionName     Section name.
+  @param EntryName       Section entry name.
+  @param Data            Point to the got heximal UINTN value.
+
+  @retval EFI_SUCCESS    Section entry heximal UINTN value is got.
+  @retval EFI_NOT_FOUND  Section is not found.
+**/
+EFI_STATUS
+EFIAPI
+GetHexUintnFromDataFile(
+  IN      VOID                          *Context,
+  IN      CHAR8                         *SectionName,
+  IN      CHAR8                         *EntryName,
+  OUT     UINTN                         *Data
+  )
+{
+  CHAR8                                 *Value;
+  EFI_STATUS                            Status;
+
+  if (Context == NULL || SectionName == NULL || EntryName == NULL || Data == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = GetStringFromDataFile(
+             Context,
+             SectionName,
+             EntryName,
+             &Value
+             );
+  if (EFI_ERROR(Status)) {
+    return EFI_NOT_FOUND;
+  }
+  if (!IsValidHexString(Value, AsciiStrLen(Value))) {
+    return EFI_NOT_FOUND;
+  }
+  *Data = AsciiStrHexToUintn(Value);
+  return EFI_SUCCESS;
+}
+
+/**
+  Get section entry heximal UINT64 value.
+
+  @param Context         INI Config file context.
+  @param SectionName     Section name.
+  @param EntryName       Section entry name.
+  @param Data            Point to the got heximal UINT64 value.
+
+  @retval EFI_SUCCESS    Section entry heximal UINT64 value is got.
+  @retval EFI_NOT_FOUND  Section is not found.
+**/
+EFI_STATUS
+EFIAPI
+GetHexUint64FromDataFile(
+  IN      VOID                          *Context,
+  IN      CHAR8                         *SectionName,
+  IN      CHAR8                         *EntryName,
+  OUT     UINT64                        *Data
+  )
+{
+  CHAR8                                 *Value;
+  EFI_STATUS                            Status;
+
+  if (Context == NULL || SectionName == NULL || EntryName == NULL || Data == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = GetStringFromDataFile(
+             Context,
+             SectionName,
+             EntryName,
+             &Value
+             );
+  if (EFI_ERROR(Status)) {
+    return EFI_NOT_FOUND;
+  }
+  if (!IsValidHexString(Value, AsciiStrLen(Value))) {
+    return EFI_NOT_FOUND;
+  }
+  *Data = AsciiStrHexToUint64(Value);
+  return EFI_SUCCESS;
+}
+
+/**
+  Close an INI config file and free the context.
+
+  @param Context         INI Config file context.
+**/
+VOID
+EFIAPI
+CloseIniFile(
+  IN      VOID                          *Context
+  )
+{
+  INI_PARSING_LIB_CONTEXT               *IniContext;
+
+  if (Context == NULL) {
+    return ;
+  }
+
+  IniContext = Context;
+  FreeAllList(IniContext->SectionHead, IniContext->CommentHead);
+
+  return;
+}
diff --git a/MdeModulePkg/Library/IniParsingLib/IniParsingLib.inf b/MdeModulePkg/Library/IniParsingLib/IniParsingLib.inf
new file mode 100644
index 0000000..4721388
--- /dev/null
+++ b/MdeModulePkg/Library/IniParsingLib/IniParsingLib.inf
@@ -0,0 +1,42 @@
+## @file
+#  INI configuration parsing library.
+#
+#  This library parses the INI configuration file.
+#
+#  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                      = IniParsingLib
+  MODULE_UNI_FILE                = IniParsingLib.uni
+  FILE_GUID                      = 6E4CD200-43E5-43CE-89E9-D715CF9526C4
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = IniParsingLib
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  IniParsingLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  MemoryAllocationLib
diff --git a/MdeModulePkg/Library/IniParsingLib/IniParsingLib.uni b/MdeModulePkg/Library/IniParsingLib/IniParsingLib.uni
new file mode 100644
index 0000000..9b198e8
--- /dev/null
+++ b/MdeModulePkg/Library/IniParsingLib/IniParsingLib.uni
@@ -0,0 +1,22 @@
+// /** @file
+// INI configuration parsing library.
+//
+// This library parses the INI configuration file.
+//
+// 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 "INI configuration parsing library."
+
+#string STR_MODULE_DESCRIPTION          #language en-US "This library parses the INI configuration file."
+
-- 
2.7.4.windows.1