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// Copyright 2020 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/nearby_sharing/certificates/nearby_share_certificate_manager.h"
#include <array>
#include "chrome/browser/nearby_sharing/certificates/constants.h"
NearbyShareCertificateManager::NearbyShareCertificateManager() = default;
NearbyShareCertificateManager::~NearbyShareCertificateManager() = default;
void NearbyShareCertificateManager::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void NearbyShareCertificateManager::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void NearbyShareCertificateManager::Start() {
if (is_running_)
return;
is_running_ = true;
OnStart();
}
void NearbyShareCertificateManager::Stop() {
if (!is_running_)
return;
is_running_ = false;
OnStop();
}
std::optional<NearbyShareEncryptedMetadataKey>
NearbyShareCertificateManager::EncryptPrivateCertificateMetadataKey(
nearby_share::mojom::Visibility visibility) {
std::optional<NearbySharePrivateCertificate> cert =
GetValidPrivateCertificate(visibility);
if (!cert)
return std::nullopt;
std::optional<NearbyShareEncryptedMetadataKey> encrypted_key =
cert->EncryptMetadataKey();
// Every salt consumed to encrypt the metadata encryption key is tracked by
// the NearbySharePrivateCertificate. Update the private certificate in
// storage to reflect the new list of consumed salts.
UpdatePrivateCertificateInStorage(*cert);
return encrypted_key;
}
std::optional<std::vector<uint8_t>>
NearbyShareCertificateManager::SignWithPrivateCertificate(
nearby_share::mojom::Visibility visibility,
base::span<const uint8_t> payload) const {
std::optional<NearbySharePrivateCertificate> cert =
GetValidPrivateCertificate(visibility);
if (!cert)
return std::nullopt;
return cert->Sign(payload);
}
std::optional<std::array<uint8_t, kNearbyShareNumBytesAuthenticationTokenHash>>
NearbyShareCertificateManager::HashAuthenticationTokenWithPrivateCertificate(
nearby_share::mojom::Visibility visibility,
base::span<const uint8_t> authentication_token) const {
std::optional<NearbySharePrivateCertificate> cert =
GetValidPrivateCertificate(visibility);
if (!cert)
return std::nullopt;
return cert->HashAuthenticationToken(authentication_token);
}
void NearbyShareCertificateManager::NotifyPublicCertificatesDownloaded() {
for (auto& observer : observers_)
observer.OnPublicCertificatesDownloaded();
}
void NearbyShareCertificateManager::NotifyPrivateCertificatesChanged() {
for (auto& observer : observers_)
observer.OnPrivateCertificatesChanged();
}
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