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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/web_applications/isolated_web_apps/iwa_identity_validator.h"
#include <variant>
#include "base/base64.h"
#include "base/containers/map_util.h"
#include "base/no_destructor.h"
#include "base/strings/stringprintf.h"
#include "components/web_package/signed_web_bundles/ecdsa_p256_public_key.h"
#include "components/web_package/signed_web_bundles/ed25519_public_key.h"
#include "components/webapps/isolated_web_apps/iwa_key_distribution_info_provider.h"
namespace web_app {
namespace {
base::expected<void, std::string>
ValidateWebBundleIdentityAgainstKeyRotationInfo(
const std::string& web_bundle_id,
const std::vector<web_package::PublicKey>& public_keys,
const IwaKeyDistributionInfoProvider::KeyRotationInfo& kr_info) {
if (!kr_info.public_key) {
return base::unexpected(base::StringPrintf(
"Web Bundle ID <%s> is disabled via the Key Rotation Component.",
web_bundle_id.c_str()));
}
if (!std::ranges::any_of(public_keys, [&](const auto& public_key) {
return std::visit(
[&](const auto& public_key) {
return std::ranges::equal(public_key.bytes(),
*kr_info.public_key);
},
public_key);
})) {
return base::unexpected(
base::StringPrintf("Rotated key for Web Bundle ID <%s> doesn't match "
"any public key in the signature list.",
web_bundle_id.c_str()));
}
return base::ok();
}
} // namespace
void IwaIdentityValidator::CreateSingleton() {
static base::NoDestructor<IwaIdentityValidator> instance;
instance.get();
}
base::expected<void, std::string>
IwaIdentityValidator::ValidateWebBundleIdentity(
const std::string& web_bundle_id,
const std::vector<web_package::PublicKey>& public_keys) const {
if (const auto* kr_info =
IwaKeyDistributionInfoProvider::GetInstance().GetKeyRotationInfo(
web_bundle_id)) {
return ValidateWebBundleIdentityAgainstKeyRotationInfo(
web_bundle_id, public_keys, *kr_info);
}
return IdentityValidator::ValidateWebBundleIdentity(web_bundle_id,
public_keys);
}
} // namespace web_app
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