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// Copyright (c) 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/extensions/api/messaging/native_messaging_host_manifest.h"
#include <stddef.h>
#include "base/json/json_file_value_serializer.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/values.h"
namespace extensions {
NativeMessagingHostManifest::~NativeMessagingHostManifest() {}
// static
bool NativeMessagingHostManifest::IsValidName(const std::string& name) {
if (name.empty()) {
return false;
}
for (size_t i = 0; i < name.size(); ++i) {
char c = name[i];
// Verify that only the following characters are used: [a-z0-9._].
if (!(base::IsAsciiLower(c) || base::IsAsciiDigit(c) || c == '.' ||
c == '_')) {
return false;
}
// Verify that dots are separated by other characters and that string
// doesn't begin or end with a dot.
if (c == '.' && (i == 0 || name[i - 1] == '.' || i == name.size() - 1)) {
return false;
}
}
return true;
}
// static
std::unique_ptr<NativeMessagingHostManifest> NativeMessagingHostManifest::Load(
const base::FilePath& file_path,
std::string* error_message) {
DCHECK(error_message);
JSONFileValueDeserializer deserializer(file_path);
std::unique_ptr<base::Value> parsed =
deserializer.Deserialize(NULL, error_message);
if (!parsed) {
return std::unique_ptr<NativeMessagingHostManifest>();
}
base::DictionaryValue* dictionary;
if (!parsed->GetAsDictionary(&dictionary)) {
*error_message = "Invalid manifest file.";
return std::unique_ptr<NativeMessagingHostManifest>();
}
std::unique_ptr<NativeMessagingHostManifest> result(
new NativeMessagingHostManifest());
if (!result->Parse(dictionary, error_message)) {
return std::unique_ptr<NativeMessagingHostManifest>();
}
return result;
}
NativeMessagingHostManifest::NativeMessagingHostManifest() {
}
bool NativeMessagingHostManifest::Parse(base::DictionaryValue* dictionary,
std::string* error_message) {
if (!dictionary->GetString("name", &name_) ||
!IsValidName(name_)) {
*error_message = "Invalid value for name.";
return false;
}
if (!dictionary->GetString("description", &description_) ||
description_.empty()) {
*error_message = "Invalid value for description.";
return false;
}
std::string type;
// stdio is the only host type that's currently supported.
if (!dictionary->GetString("type", &type) ||
type != "stdio") {
*error_message = "Invalid value for type.";
return false;
}
interface_ = HOST_INTERFACE_STDIO;
std::string path;
// JSON parsed checks that all strings are valid UTF8.
if (!dictionary->GetString("path", &path) ||
(path_ = base::FilePath::FromUTF8Unsafe(path)).empty()) {
*error_message = "Invalid value for path.";
return false;
}
const base::ListValue* allowed_origins_list;
if (!dictionary->GetList("allowed_origins", &allowed_origins_list)) {
*error_message =
"Invalid value for allowed_origins. Expected a list of strings.";
return false;
}
allowed_origins_.ClearPatterns();
for (auto it = allowed_origins_list->begin();
it != allowed_origins_list->end(); ++it) {
std::string pattern_string;
if (!it->GetAsString(&pattern_string)) {
*error_message = "allowed_origins must be list of strings.";
return false;
}
URLPattern pattern(URLPattern::SCHEME_EXTENSION);
URLPattern::ParseResult result = pattern.Parse(pattern_string);
if (result != URLPattern::ParseResult::kSuccess) {
*error_message = "Failed to parse pattern \"" + pattern_string +
"\": " + URLPattern::GetParseResultString(result);
return false;
}
// Disallow patterns that are too broad. Set of allowed origins must be a
// fixed list of extensions.
if (pattern.match_all_urls() || pattern.match_subdomains()) {
*error_message = "Pattern \"" + pattern_string + "\" is not allowed.";
return false;
}
allowed_origins_.AddPattern(pattern);
}
return true;
}
} // namespace extensions
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