public inbox for devel@edk2.groups.io
 help / color / mirror / Atom feed
From: Liming Gao <liming.gao@intel.com>
To: edk2-devel@lists.01.org
Cc: Jiewen Yao <jiewen.yao@intel.com>
Subject: [Patch] SignedCapsulePkg: Update EdkiiSystemCapsuleLib to check PCD value
Date: Tue, 28 Nov 2017 11:26:34 +0800	[thread overview]
Message-ID: <1511839594-6220-1-git-send-email-liming.gao@intel.com> (raw)

If PCD value is not set, register PcdCallBack to hook PCD value set

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
---
 .../EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.c  | 86 +++++++++++++++++++++-
 .../EdkiiSystemCapsuleLib.inf                      |  3 +
 2 files changed, 87 insertions(+), 2 deletions(-)

diff --git a/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.c b/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.c
index 62be8eb..876d225 100644
--- a/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.c
+++ b/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.c
@@ -29,6 +29,7 @@
 #include <Library/BaseLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
 #include <Library/MemoryAllocationLib.h>
 #include <Library/EdkiiSystemCapsuleLib.h>
 #include <Library/FmpAuthenticationLib.h>
@@ -600,6 +601,10 @@ CapsuleAuthenticateSystemFirmware (
   // NOTE: This function need run in an isolated environment.
   // Do not touch FMP protocol and its private structure.
   //
+  if (mImageFmpInfo == NULL) {
+    DEBUG((DEBUG_INFO, "ImageFmpInfo is not set\n"));
+    return EFI_SECURITY_VIOLATION;
+  }
 
   Result = ExtractAuthenticatedImage((VOID *)Image, ImageSize, LastAttemptStatus, AuthenticatedImage, AuthenticatedImageSize);
   if (!Result) {
@@ -655,6 +660,53 @@ CapsuleAuthenticateSystemFirmware (
 }
 
 /**
+  PcdCallBack gets the real set PCD value
+
+  @param[in]      CallBackGuid    The PCD token GUID being set.
+  @param[in]      CallBackToken   The PCD token number being set.
+  @param[in, out] TokenData       A pointer to the token data being set.
+  @param[in]      TokenDataSize   The size, in bytes, of the data being set.
+
+**/
+VOID
+EFIAPI
+EdkiiSystemCapsuleLibPcdCallBack (
+  IN        CONST GUID        *CallBackGuid, OPTIONAL
+  IN        UINTN             CallBackToken,
+  IN  OUT   VOID              *TokenData,
+  IN        UINTN             TokenDataSize
+  )
+{
+  if (CompareGuid (CallBackGuid, &gEfiSignedCapsulePkgTokenSpaceGuid) &&
+      CallBackToken == PcdToken (PcdEdkiiSystemFirmwareImageDescriptor)) {
+    mImageFmpInfoSize = TokenDataSize;
+    mImageFmpInfo = AllocateCopyPool (mImageFmpInfoSize, TokenData);
+    ASSERT(mImageFmpInfo != NULL);
+    //
+    // Cancel Callback after get the real set value
+    //
+    LibPcdCancelCallback (
+      &gEfiSignedCapsulePkgTokenSpaceGuid,
+      PcdToken (PcdEdkiiSystemFirmwareImageDescriptor),
+      EdkiiSystemCapsuleLibPcdCallBack
+      );
+  }
+
+  if (CompareGuid (CallBackGuid, &gEfiSignedCapsulePkgTokenSpaceGuid) &&
+      CallBackToken == PcdToken (PcdEdkiiSystemFirmwareFileGuid)) {
+    CopyGuid(&mEdkiiSystemFirmwareFileGuid, TokenData);
+    //
+    // Cancel Callback after get the real set value
+    //
+    LibPcdCancelCallback (
+      &gEfiSignedCapsulePkgTokenSpaceGuid,
+      PcdToken (PcdEdkiiSystemFirmwareFileGuid),
+      EdkiiSystemCapsuleLibPcdCallBack
+      );
+  }
+}
+
+/**
   The constructor function.
 
   @retval EFI_SUCCESS   The constructor successfully .
@@ -666,8 +718,38 @@ EdkiiSystemCapsuleLibConstructor (
   )
 {
   mImageFmpInfoSize = PcdGetSize(PcdEdkiiSystemFirmwareImageDescriptor);
-  mImageFmpInfo = AllocateCopyPool (mImageFmpInfoSize, PcdGetPtr(PcdEdkiiSystemFirmwareImageDescriptor));
-  ASSERT(mImageFmpInfo != NULL);
+  mImageFmpInfo     = PcdGetPtr(PcdEdkiiSystemFirmwareImageDescriptor);
+  //
+  // Verify Firmware Image Descriptor first
+  //
+  if (mImageFmpInfoSize < sizeof (EDKII_SYSTEM_FIRMWARE_IMAGE_DESCRIPTOR) ||
+      mImageFmpInfo->Signature != EDKII_SYSTEM_FIRMWARE_IMAGE_DESCRIPTOR_SIGNATURE) {
+    //
+    // SystemFirmwareImageDescriptor is not set.
+    // Register PCD set callback to hook PCD value set.
+    //
+    mImageFmpInfo     = NULL;
+    mImageFmpInfoSize = 0;
+    LibPcdCallbackOnSet (
+      &gEfiSignedCapsulePkgTokenSpaceGuid,
+      PcdToken (PcdEdkiiSystemFirmwareImageDescriptor),
+      EdkiiSystemCapsuleLibPcdCallBack
+      );
+  } else {
+    mImageFmpInfo = AllocateCopyPool (mImageFmpInfoSize, mImageFmpInfo);
+    ASSERT(mImageFmpInfo != NULL);
+  }
+
   CopyGuid(&mEdkiiSystemFirmwareFileGuid, PcdGetPtr(PcdEdkiiSystemFirmwareFileGuid));
+  //
+  // Verify GUID value first
+  //
+  if (CompareGuid (&mEdkiiSystemFirmwareFileGuid, &gZeroGuid)) {
+    LibPcdCallbackOnSet (
+      &gEfiSignedCapsulePkgTokenSpaceGuid,
+      PcdToken (PcdEdkiiSystemFirmwareFileGuid),
+      EdkiiSystemCapsuleLibPcdCallBack
+      );
+  }
   return EFI_SUCCESS;
 }
diff --git a/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.inf b/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.inf
index a21e75c..a721619 100644
--- a/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.inf
+++ b/SignedCapsulePkg/Library/EdkiiSystemCapsuleLib/EdkiiSystemCapsuleLib.inf
@@ -43,6 +43,7 @@
   BaseLib
   BaseMemoryLib
   DebugLib
+  PcdLib
   MemoryAllocationLib
   FmpAuthenticationLib
 
@@ -58,4 +59,6 @@
   gEdkiiSystemFmpCapsuleDriverFvFileGuid               ## SOMETIMES_CONSUMES   ## GUID
   gEfiCertPkcs7Guid                                    ## SOMETIMES_CONSUMES   ## GUID
   gEfiCertTypeRsa2048Sha256Guid                        ## SOMETIMES_CONSUMES   ## GUID
+  gEfiSignedCapsulePkgTokenSpaceGuid                   ## SOMETIMES_CONSUMES   ## GUID
+  gZeroGuid                                            ## SOMETIMES_CONSUMES   ## GUID
 
-- 
2.8.0.windows.1



             reply	other threads:[~2017-11-28  3:22 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-28  3:26 Liming Gao [this message]
2017-12-07  8:13 ` [Patch] SignedCapsulePkg: Update EdkiiSystemCapsuleLib to check PCD value Yao, Jiewen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-list from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1511839594-6220-1-git-send-email-liming.gao@intel.com \
    --to=devel@edk2.groups.io \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox