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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CDMStorageIdProvider.h"
#include "GMPLog.h"
#include "nsCOMPtr.h"
#include "nsComponentManagerUtils.h"
#include "nsICryptoHash.h"
#ifdef SUPPORT_STORAGE_ID
# include "rlz/lib/machine_id.h"
#endif
namespace mozilla {
/*static*/
nsCString CDMStorageIdProvider::ComputeStorageId(const nsCString& aOriginSalt) {
#ifndef SUPPORT_STORAGE_ID
return ""_ns;
#else
GMP_LOG_DEBUG("CDMStorageIdProvider::ComputeStorageId");
std::string machineId;
if (!rlz_lib::GetMachineId(&machineId)) {
GMP_LOG_DEBUG(
"CDMStorageIdProvider::ComputeStorageId: get machineId failed.");
return ""_ns;
}
std::string originSalt(aOriginSalt.BeginReading(), aOriginSalt.Length());
std::string input =
machineId + originSalt + CDMStorageIdProvider::kBrowserIdentifier;
nsresult rv;
nsCOMPtr<nsICryptoHash> hasher =
do_CreateInstance("@mozilla.org/security/hash;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
GMP_LOG_DEBUG(
"CDMStorageIdProvider::ComputeStorageId: no crypto hash(0x%08" PRIx32
")",
static_cast<uint32_t>(rv));
return ""_ns;
}
rv = hasher->Init(nsICryptoHash::SHA256);
if (NS_WARN_IF(NS_FAILED(rv))) {
GMP_LOG_DEBUG(
"CDMStorageIdProvider::ComputeStorageId: failed to initialize "
"hash(0x%08" PRIx32 ")",
static_cast<uint32_t>(rv));
return ""_ns;
}
rv = hasher->Update(reinterpret_cast<const uint8_t*>(input.c_str()),
input.size());
if (NS_WARN_IF(NS_FAILED(rv))) {
GMP_LOG_DEBUG(
"CDMStorageIdProvider::ComputeStorageId: failed to update "
"hash(0x%08" PRIx32 ")",
static_cast<uint32_t>(rv));
return ""_ns;
}
nsCString storageId;
rv = hasher->Finish(false, storageId);
if (NS_WARN_IF(NS_FAILED(rv))) {
GMP_LOG_DEBUG(
"CDMStorageIdProvider::ComputeStorageId: failed to get the final hash "
"result(0x%08" PRIx32 ")",
static_cast<uint32_t>(rv));
return ""_ns;
}
return storageId;
#endif
}
} // namespace mozilla