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// Copyright 2013 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 "chrome/browser/install_verification/win/module_ids.h"
#include <utility>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "grit/browser_resources.h"
#include "ui/base/resource/resource_bundle.h"
namespace {
struct { size_t id; const char* module_name_digest; }
kExpectedInstallModules[] = {
{1u, "c8cc47613e155f2129f480c6ced84549"}, // chrome.dll
{2u, "49b78a23b0d8d5d8fb60d4e472b22764"}, // chrome_child.dll
};
// Parses a line consisting of a positive decimal number and a 32-digit
// hexadecimal number, separated by a space. Inserts the output, if valid, into
// |module_ids|. Unexpected leading or trailing characters will cause
// the line to be ignored, as will invalid decimal/hexadecimal characters.
void ParseAdditionalModuleID(
const base::StringPiece& line,
ModuleIDs* module_ids) {
DCHECK(module_ids);
base::CStringTokenizer line_tokenizer(line.begin(), line.end(), " ");
if (!line_tokenizer.GetNext())
return; // Empty string.
base::StringPiece id_piece(line_tokenizer.token_piece());
if (!line_tokenizer.GetNext())
return; // No delimiter (' ').
base::StringPiece digest_piece(line_tokenizer.token_piece());
if (line_tokenizer.GetNext())
return; // Unexpected trailing characters.
unsigned id = 0;
if (!StringToUint(id_piece, &id))
return; // First token was not decimal.
if (digest_piece.length() != 32)
return; // Second token is not the right length.
for (base::StringPiece::const_iterator it = digest_piece.begin();
it != digest_piece.end(); ++it) {
if (!IsHexDigit(*it))
return; // Second token has invalid characters.
}
// This is a valid line.
module_ids->insert(std::make_pair(digest_piece.as_string(), id));
}
} // namespace
void ParseAdditionalModuleIDs(
const base::StringPiece& raw_data,
ModuleIDs* module_ids) {
DCHECK(module_ids);
base::CStringTokenizer file_tokenizer(raw_data.begin(),
raw_data.end(),
"\r\n");
while (file_tokenizer.GetNext()) {
ParseAdditionalModuleID(base::StringPiece(file_tokenizer.token_piece()),
module_ids);
}
}
void LoadModuleIDs(ModuleIDs* module_ids) {
for (size_t i = 0; i < arraysize(kExpectedInstallModules); ++i) {
module_ids->insert(
std::make_pair(
kExpectedInstallModules[i].module_name_digest,
kExpectedInstallModules[i].id));
}
base::StringPiece additional_module_ids;
#if defined(GOOGLE_CHROME_BUILD)
additional_module_ids =
ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_ADDITIONAL_MODULE_IDS);
#endif
ParseAdditionalModuleIDs(additional_module_ids, module_ids);
}
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