Move crypto_helpers from sync to base

chrome/browser/sync/util/user_settings.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 //
 // This class isn't pretty. It's just a step better than globals, which is what
 // these were previously.
 
 #include "chrome/browser/sync/util/user_settings.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <limits>
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "chrome/browser/sync/syncable/directory_manager.h"  // For migration.
-#include "chrome/browser/sync/util/crypto_helpers.h"
 #include "chrome/browser/sync/util/data_encryption.h"
 #include "chrome/common/sqlite_utils.h"
+#include "crypto/md5_calculator.h"
+#include "crypto/random.h"
 
 using std::numeric_limits;
 using std::string;
 using std::vector;
 
 using syncable::DirectoryManager;
 
 namespace browser_sync {
 
 void ExecOrDie(sqlite3* dbhandle, const char *query) {
@@ skipping 227 matching lines @@
 UserSettings::~UserSettings() {
   if (dbhandle_)
     sqlite3_close(dbhandle_);
 }
 
 const int32 kInvalidHash = 0xFFFFFFFF;
 
 // We use 10 bits of data from the MD5 digest as the hash.
 const int32 kHashMask = 0x3FF;
 
 int32 GetHashFromDigest(const vector<uint8>& digest) {

[agl, 2011/04/26 13:59:37]

Probably too late to change this now, but this function ends up putting a hole
in the bits returned.

   int32 hash = 0;
   int32 mask = kHashMask;
   for (vector<uint8>::const_iterator i = digest.begin(); i != digest.end();
        ++i) {
     hash = hash << 8;
     hash = hash | (*i & kHashMask);
     mask = mask >> 8;
     if (0 == mask)
       break;
   }
@@ skipping 164 matching lines @@
   query.prepare(dbhandle.get(), "SELECT email FROM cookies");
   if (SQLITE_ROW == query.step()) {
     *username = query.column_string(0);
     return true;
   } else {
     return false;
   }
 }
 
 }  // namespace browser_sync