1. Add more error handling code to DxeImageVerificationLib and BaseCryptLib.

[mirror_edk2.git] / SecurityPkg / Library / DxeImageVerificationLib / DxeImageVerificationLib.c

diff --git a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
index 91977522a9138cd9c751f543d22c0def0a553ce1..19852dd483241b32f622327f3f5c57a2b4dc4644 100644 (file)
--- a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
+++ b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
@@ -1,7 +1,7 @@
 /** @file\r
   Implement image verification services for secure boot service in UEFI2.3.1.\r
 \r
-Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -486,7 +486,15 @@ HashPeImageByType (
     //            .... }\r
     //    The DigestAlgorithmIdentifiers can be used to determine the hash algorithm in PE/COFF hashing\r
     //    This field has the fixed offset (+32) in final Authenticode ASN.1 data.\r
+    //    Fixed offset (+32) is calculated based on two bytes of length encoding.\r
     //\r
+    if ((*(PkcsCertData->CertData + 1) & TWO_BYTE_ENCODE) != TWO_BYTE_ENCODE) {\r
+      //\r
+      // Only support two bytes of Long Form of Length Encoding.\r
+      //\r
+      continue;\r
+    }\r
+\r
     if (CompareMem (PkcsCertData->CertData + 32, mHash[Index].OidValue, mHash[Index].OidLength) == 0) {\r
       break;\r
     }\r