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/****************************************************************************** * * * Copyright (C) 2021 by nekohasekai * * * * This program is free software: you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation, either version 3 of the License, or * * (at your option) any later version. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License * * along with this program. If not, see . * * * ******************************************************************************/ package io.nekohasekai.sagernet.ktx import android.os.Build import io.nekohasekai.sagernet.database.DataStore import java.util.UUID /** * Device HWID reporting, per the Remnawave HWID Device Limit protocol: * https://docs.rw/features/hwid-device-limit * * The HWID is a client-owned, locally persisted identifier (not derived from * hardware serials), so [resetHwid] doubles as the user-facing "new device * identity" action for panels that enforce a per-user device limit. */ object Hwid { // Panel-side validation (Remnawave v3.0.0+): /^[a-zA-Z0-9=-]{10,64}$/ private fun generate(): String = UUID.randomUUID().toString().replace("-", "") /** Returns the persisted device HWID, generating one on first use. */ fun current(): String { var value = DataStore.hwidValue if (value.isEmpty()) { value = generate() DataStore.hwidValue = value } return value } /** Regenerates the persisted HWID, presenting this device as a new one. */ fun resetHwid(): String { val value = generate() DataStore.hwidValue = value return value } /** * Headers to attach to subscription requests when HWID reporting is * enabled, either globally in settings or, via [subscriptionOverride], * for this one subscription only. Empty when neither is enabled. Device * fields fall back to the real device unless overridden in settings * (fingerprint spoofing). */ fun headers(subscriptionOverride: Boolean = false): Map { if (!DataStore.sendHwid && !subscriptionOverride) return emptyMap() return mapOf( "x-hwid" to current(), "x-device-os" to DataStore.spoofDeviceOs.ifEmpty { "Android" }, "x-ver-os" to DataStore.spoofDeviceOsVersion.ifEmpty { Build.VERSION.RELEASE }, "x-device-model" to DataStore.spoofDeviceModel.ifEmpty { Build.MODEL }, ) } }