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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/api/music_manager_private/device_id.h"
#include "base/bind.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "content/public/browser/browser_thread.h"
#include "crypto/hmac.h"
namespace {
using extensions::api::DeviceId;
// Compute HMAC-SHA256(|key|, |text|) as a string.
bool ComputeHmacSha256(const std::string& key,
const std::string& text,
std::string* signature_return) {
crypto::HMAC hmac(crypto::HMAC::SHA256);
const size_t digest_length = hmac.DigestLength();
std::vector<uint8> digest(digest_length);
bool result = hmac.Init(key) &&
hmac.Sign(text, &digest[0], digest.size());
if (result) {
*signature_return = base::StringToLowerASCII(
base::HexEncode(digest.data(), digest.size()));
}
return result;
}
void GetRawDeviceIdCallback(const std::string& extension_id,
const DeviceId::IdCallback& callback,
const std::string& raw_device_id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (raw_device_id.empty()) {
callback.Run("");
return;
}
std::string device_id;
if (!ComputeHmacSha256(raw_device_id, extension_id, &device_id)) {
DLOG(ERROR) << "Error while computing HMAC-SHA256 of device id.";
callback.Run("");
return;
}
callback.Run(device_id);
}
bool IsValidMacAddressImpl(const void* bytes, size_t size) {
const size_t MAC_LENGTH = 6;
const size_t OUI_LENGTH = 3;
struct InvalidMacEntry {
size_t size;
unsigned char address[MAC_LENGTH];
};
// VPN, virtualization, tethering, bluetooth, etc.
static InvalidMacEntry invalidAddresses[] = {
// Empty address
{MAC_LENGTH, {0, 0, 0, 0, 0, 0}},
// VMware
{OUI_LENGTH, {0x00, 0x50, 0x56}},
{OUI_LENGTH, {0x00, 0x05, 0x69}},
{OUI_LENGTH, {0x00, 0x0c, 0x29}},
{OUI_LENGTH, {0x00, 0x1c, 0x14}},
// VirtualBox
{OUI_LENGTH, {0x08, 0x00, 0x27}},
// PdaNet
{MAC_LENGTH, {0x00, 0x26, 0x37, 0xbd, 0x39, 0x42}},
// Cisco AnyConnect VPN
{MAC_LENGTH, {0x00, 0x05, 0x9a, 0x3c, 0x7a, 0x00}},
// Marvell sometimes uses this as a dummy address
{MAC_LENGTH, {0x00, 0x11, 0x22, 0x33, 0x44, 0x55}},
// Apple uses this across machines for Bluetooth ethernet adapters.
{MAC_LENGTH-1, {0x65, 0x90, 0x07, 0x42, 0xf1}},
// Juniper uses this for their Virtual Adapter, the other 4 bytes are
// reassigned at every boot. 00-ff-xx is not assigned to anyone.
{2, {0x00, 0xff}},
// T-Mobile Wireless Ethernet
{MAC_LENGTH, {0x00, 0xa0, 0xc6, 0x00, 0x00, 0x00}},
// Generic Bluetooth device
{MAC_LENGTH, {0x00, 0x15, 0x83, 0x3d, 0x0a, 0x57}},
// RAS Async Adapter
{MAC_LENGTH, {0x20, 0x41, 0x53, 0x59, 0x4e, 0xff}},
// Qualcomm USB ethernet adapter
{MAC_LENGTH, {0x00, 0xa0, 0xc6, 0x00, 0x00, 0x00}},
// Windows VPN
{MAC_LENGTH, {0x00, 0x53, 0x45, 0x00, 0x00, 0x00}},
// Bluetooth
{MAC_LENGTH, {0x00, 0x1f, 0x81, 0x00, 0x08, 0x30}},
{MAC_LENGTH, {0x00, 0x1b, 0x10, 0x00, 0x2a, 0xec}},
{MAC_LENGTH, {0x00, 0x15, 0x83, 0x15, 0xa3, 0x10}},
{MAC_LENGTH, {0x00, 0x15, 0x83, 0x07, 0xC6, 0x5A}},
{MAC_LENGTH, {0x00, 0x1f, 0x81, 0x00, 0x02, 0x00}},
{MAC_LENGTH, {0x00, 0x1f, 0x81, 0x00, 0x02, 0xdd}},
// Ceton TV tuner
{MAC_LENGTH, {0x00, 0x22, 0x2c, 0xff, 0xff, 0xff}},
// Check Point VPN
{MAC_LENGTH, {0x54, 0x55, 0x43, 0x44, 0x52, 0x09}},
{MAC_LENGTH, {0x54, 0xEF, 0x14, 0x71, 0xE4, 0x0E}},
{MAC_LENGTH, {0x54, 0xBA, 0xC6, 0xFF, 0x74, 0x10}},
// Cisco VPN
{MAC_LENGTH, {0x00, 0x05, 0x9a, 0x3c, 0x7a, 0x00}},
// Cisco VPN
{MAC_LENGTH, {0x00, 0x05, 0x9a, 0x3c, 0x78, 0x00}},
// Intel USB cell modem
{MAC_LENGTH, {0x00, 0x1e, 0x10, 0x1f, 0x00, 0x01}},
// Microsoft tethering
{MAC_LENGTH, {0x80, 0x00, 0x60, 0x0f, 0xe8, 0x00}},
// Nortel VPN
{MAC_LENGTH, {0x44, 0x45, 0x53, 0x54, 0x42, 0x00}},
// AEP VPN
{MAC_LENGTH, {0x00, 0x30, 0x70, 0x00, 0x00, 0x01}},
// Positive VPN
{MAC_LENGTH, {0x00, 0x02, 0x03, 0x04, 0x05, 0x06}},
// Bluetooth
{MAC_LENGTH, {0x00, 0x15, 0x83, 0x0B, 0x13, 0xC0}},
// Kerio Virtual Network Adapter
{MAC_LENGTH, {0x44, 0x45, 0x53, 0x54, 0x4f, 0x53}},
// Sierra Wireless cell modems.
{OUI_LENGTH, {0x00, 0xA0, 0xD5}},
// FRITZ!web DSL
{MAC_LENGTH, {0x00, 0x04, 0x0E, 0xFF, 0xFF, 0xFF}},
// VirtualPC
{MAC_LENGTH, {0x00, 0x00, 0x00, 0x00, 0x00, 0x01}},
// Bluetooth
{MAC_LENGTH, {0x00, 0x1F, 0x81, 0x00, 0x01, 0x00}},
{MAC_LENGTH, {0x00, 0x30, 0x91, 0x10, 0x00, 0x26}},
{MAC_LENGTH, {0x00, 0x25, 0x00, 0x5A, 0xC3, 0xD0}},
{MAC_LENGTH, {0x00, 0x15, 0x83, 0x0C, 0xBF, 0xEB}},
// Huawei cell modem
{MAC_LENGTH, {0x58, 0x2C, 0x80, 0x13, 0x92, 0x63}},
// Fortinet VPN
{OUI_LENGTH, {0x00, 0x09, 0x0F}},
// Realtek
{MAC_LENGTH, {0x00, 0x00, 0x00, 0x00, 0x00, 0x30}},
// Other rare dupes.
{MAC_LENGTH, {0x00, 0x11, 0xf5, 0x0d, 0x8a, 0xe8}}, // Atheros
{MAC_LENGTH, {0x00, 0x20, 0x07, 0x01, 0x16, 0x06}}, // Atheros
{MAC_LENGTH, {0x0d, 0x0b, 0x00, 0x00, 0xe0, 0x00}}, // Atheros
{MAC_LENGTH, {0x90, 0x4c, 0xe5, 0x0b, 0xc8, 0x8e}}, // Atheros
{MAC_LENGTH, {0x00, 0x1c, 0x23, 0x38, 0x49, 0xa4}}, // Broadcom
{MAC_LENGTH, {0x00, 0x12, 0x3f, 0x82, 0x7c, 0x32}}, // Broadcom
{MAC_LENGTH, {0x00, 0x11, 0x11, 0x32, 0xc3, 0x77}}, // Broadcom
{MAC_LENGTH, {0x00, 0x24, 0xd6, 0xae, 0x3e, 0x39}}, // Microsoft
{MAC_LENGTH, {0x00, 0x0f, 0xb0, 0x3a, 0xb4, 0x80}}, // Realtek
{MAC_LENGTH, {0x08, 0x10, 0x74, 0xa1, 0xda, 0x1b}}, // Realtek
{MAC_LENGTH, {0x00, 0x21, 0x9b, 0x2a, 0x0a, 0x9c}}, // Realtek
};
if (size != MAC_LENGTH) {
return false;
}
if (static_cast<const unsigned char *>(bytes)[0] & 0x02) {
// Locally administered.
return false;
}
for (size_t i = 0; i < arraysize(invalidAddresses); ++i) {
size_t count = invalidAddresses[i].size;
if (memcmp(invalidAddresses[i].address, bytes, count) == 0) {
return false;
}
}
return true;
}
} // namespace
namespace extensions {
namespace api {
// static
void DeviceId::GetDeviceId(const std::string& extension_id,
const IdCallback& callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
CHECK(!extension_id.empty());
// Forward call to platform specific implementation, then compute the HMAC
// in the callback.
GetRawDeviceId(base::Bind(&GetRawDeviceIdCallback, extension_id, callback));
}
// static
bool DeviceId::IsValidMacAddress(const void* bytes, size_t size) {
return IsValidMacAddressImpl(bytes, size);
}
} // namespace api
} // namespace extensions
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