fdo#76222 oox: add support for MSO 2007 SP2 encrypted documents

Change-Id: I8fa586d49437ff5422fc3daa4c81439146e598a0

include/oox/crypto/Standard2007Engine.hxx

@@ -38,6 +38,9 @@ const sal_uInt32 ENCRYPT_PROVIDER_TYPE_RC4  = 0x00000001;
 
 // version of encryption info used in MS Office 2007 (major = 3, minor = 2)
 const sal_uInt32 VERSION_INFO_2007_FORMAT       = 0x00020003;
+// version of encryption info used in MS Office 2007 SP2 and older (major = 4, minor = 2)
+const sal_uInt32 VERSION_INFO_2007_FORMAT_SP2   = 0x00020004;
+
 // version of encryption info - agile (major = 4, minor = 4)
 const sal_uInt32 VERSION_INFO_AGILE         = 0x00040004;
 

oox/source/crypto/DocumentDecryption.cxx

@@ -345,6 +345,7 @@ bool DocumentDecryption::readEncryptionInfo()
     switch (aVersion)
     {
         case VERSION_INFO_2007_FORMAT:
+        case VERSION_INFO_2007_FORMAT_SP2:
             mCryptoType = STANDARD_2007; // Set encryption info format
             bResult = readStandard2007EncryptionInfo( aBinaryInputStream );
             break;