Index: third_party/hunspell/google/bdict.cc |
=================================================================== |
--- third_party/hunspell/google/bdict.cc (revision 0) |
+++ third_party/hunspell/google/bdict.cc (revision 0) |
@@ -0,0 +1,40 @@ |
+// Copyright (c) 2010 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "third_party/hunspell/google/bdict.h" |
+ |
+// static |
+bool hunspell::BDict::Verify(const char* bdict_data, size_t bdict_length) { |
+ if (bdict_length <= sizeof(hunspell::BDict::Header)) |
+ return false; |
+ |
+ const BDict::Header* header = |
+ reinterpret_cast<const hunspell::BDict::Header*>(bdict_data); |
+ if (header->signature != hunspell::BDict::SIGNATURE || |
+ header->major_version > hunspell::BDict::MAJOR_VERSION || |
+ header->dic_offset > bdict_length) |
+ return false; |
+ |
+ // Get the affix header, make sure there is enough room for it. |
+ if (header->aff_offset + sizeof(hunspell::BDict::AffHeader) > bdict_length) |
+ return false; |
+ |
+ // Make sure there is enough room for the affix group count dword. |
+ const hunspell::BDict::AffHeader* aff_header = |
+ reinterpret_cast<const hunspell::BDict::AffHeader*>( |
+ &bdict_data[header->aff_offset]); |
+ if (aff_header->affix_group_offset + sizeof(uint32) > bdict_length) |
+ return false; |
+ |
+ // The new BDICT header has a MD5 digest of the dictionary data. Compare the |
+ // MD5 digest of the data with the one in the BDICT header. |
+ if (header->major_version >= 2) { |
+ MD5Digest digest; |
+ MD5Sum(aff_header, bdict_length - header->aff_offset, &digest); |
+ if (memcmp(&digest, &header->digest, sizeof(digest))) |
+ return false; |
+ } |
+ |
+ return true; |
+} |
Property changes on: third_party/hunspell/google/bdict.cc |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |