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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/common/manifest_handlers/externally_connectable.h"
#include <stddef.h>
#include <algorithm>
#include <memory>
#include "base/memory/ptr_util.h"
#include "base/strings/utf_string_conversions.h"
#include "components/crx_file/id_util.h"
#include "extensions/common/api/extensions_manifest_types.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/permissions_parser.h"
#include "extensions/common/permissions/api_permission_set.h"
#include "extensions/common/url_pattern.h"
#include "url/gurl.h"
namespace extensions {
namespace externally_connectable_errors {
const char kErrorInvalidMatchPattern[] = "Invalid match pattern '*' (*)";
const char kErrorInvalidId[] = "Invalid ID '*'";
const char kErrorNothingSpecified[] =
"'externally_connectable' specifies neither 'matches' nor 'ids'; "
"nothing will be able to connect";
const char kErrorUnusedAcceptsTlsChannelId[] =
"'externally_connectable' specifies 'accepts_tls_channel_id' but not "
"'matches'; 'accepts_tls_channel_id' has no efect";
} // namespace externally_connectable_errors
namespace keys = extensions::manifest_keys;
using api::extensions_manifest_types::ExternallyConnectable;
namespace {
const char kAllIds[] = "*";
template <typename T>
std::vector<T> Sorted(const std::vector<T>& in) {
std::vector<T> out = in;
std::sort(out.begin(), out.end());
return out;
}
} // namespace
ExternallyConnectableHandler::ExternallyConnectableHandler() = default;
ExternallyConnectableHandler::~ExternallyConnectableHandler() = default;
bool ExternallyConnectableHandler::Parse(Extension* extension,
std::u16string* error) {
const base::Value* externally_connectable =
extension->manifest()->FindPath(keys::kExternallyConnectable);
CHECK(externally_connectable != nullptr);
std::vector<InstallWarning> install_warnings;
std::unique_ptr<ExternallyConnectableInfo> info =
ExternallyConnectableInfo::FromValue(*externally_connectable,
&install_warnings, error);
if (!info) {
return false;
}
extension->AddInstallWarnings(std::move(install_warnings));
extension->SetManifestData(keys::kExternallyConnectable, std::move(info));
return true;
}
base::span<const char* const> ExternallyConnectableHandler::Keys() const {
static constexpr const char* kKeys[] = {keys::kExternallyConnectable};
return kKeys;
}
// static
ExternallyConnectableInfo* ExternallyConnectableInfo::Get(
const Extension* extension) {
return static_cast<ExternallyConnectableInfo*>(
extension->GetManifestData(keys::kExternallyConnectable));
}
// static
std::unique_ptr<ExternallyConnectableInfo> ExternallyConnectableInfo::FromValue(
const base::Value& value,
std::vector<InstallWarning>* install_warnings,
std::u16string* error) {
auto externally_connectable = ExternallyConnectable::FromValue(value);
if (!externally_connectable.has_value()) {
*error = std::move(externally_connectable).error();
return nullptr;
}
URLPatternSet matches;
if (externally_connectable->matches) {
for (auto it = externally_connectable->matches->begin();
it != externally_connectable->matches->end(); ++it) {
// Safe to use SCHEME_ALL here; externally_connectable gives a page ->
// extension communication path, not the other way.
URLPattern pattern(URLPattern::SCHEME_ALL);
auto parse_result = pattern.Parse(*it);
if (parse_result != URLPattern::ParseResult::kSuccess) {
*error = ErrorUtils::FormatErrorMessageUTF16(
externally_connectable_errors::kErrorInvalidMatchPattern, *it,
URLPattern::GetParseResultString(parse_result));
return nullptr;
}
matches.AddPattern(pattern);
}
}
std::vector<ExtensionId> ids;
bool all_ids = false;
if (externally_connectable->ids) {
for (const auto& id : *externally_connectable->ids) {
if (id == kAllIds) {
all_ids = true;
} else if (crx_file::id_util::IdIsValid(id)) {
ids.push_back(id);
} else {
*error = ErrorUtils::FormatErrorMessageUTF16(
externally_connectable_errors::kErrorInvalidId, id);
return nullptr;
}
}
}
if (!all_ids && matches.is_empty() && ids.empty()) {
install_warnings->emplace_back(
externally_connectable_errors::kErrorNothingSpecified,
keys::kExternallyConnectable);
}
bool accepts_tls_channel_id =
externally_connectable->accepts_tls_channel_id.value_or(false);
if (externally_connectable->accepts_tls_channel_id && matches.is_empty()) {
accepts_tls_channel_id = false;
install_warnings->emplace_back(
externally_connectable_errors::kErrorUnusedAcceptsTlsChannelId,
keys::kExternallyConnectable);
}
return base::WrapUnique(new ExternallyConnectableInfo(
std::move(matches), ids, all_ids, accepts_tls_channel_id));
}
ExternallyConnectableInfo::~ExternallyConnectableInfo() = default;
ExternallyConnectableInfo::ExternallyConnectableInfo(
URLPatternSet matches,
const std::vector<ExtensionId>& ids,
bool all_ids,
bool accepts_tls_channel_id)
: matches(std::move(matches)),
ids(Sorted(ids)),
all_ids(all_ids),
accepts_tls_channel_id(accepts_tls_channel_id) {}
bool ExternallyConnectableInfo::IdCanConnect(const ExtensionId& id) {
if (all_ids) {
return true;
}
DCHECK(std::ranges::is_sorted(ids));
return std::binary_search(ids.begin(), ids.end(), id);
}
} // namespace extensions
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