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// Copyright (c) 2012 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 <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/network/IOEthernetController.h>
#include <IOKit/network/IOEthernetInterface.h>
#include <IOKit/network/IONetworkInterface.h>
#include "base/logging.h"
#include "base/mac/foundation_util.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/scoped_ioobject.h"
#include "base/strings/string16.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
namespace rlz_lib {
namespace {
// See http://developer.apple.com/library/mac/#technotes/tn1103/_index.html
// The caller is responsible for freeing |matching_services|.
bool FindEthernetInterfaces(io_iterator_t* matching_services) {
base::ScopedCFTypeRef<CFMutableDictionaryRef> matching_dict(
IOServiceMatching(kIOEthernetInterfaceClass));
if (!matching_dict)
return false;
base::ScopedCFTypeRef<CFMutableDictionaryRef> primary_interface(
CFDictionaryCreateMutable(kCFAllocatorDefault,
0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks));
if (!primary_interface)
return false;
CFDictionarySetValue(
primary_interface, CFSTR(kIOPrimaryInterface), kCFBooleanTrue);
CFDictionarySetValue(
matching_dict, CFSTR(kIOPropertyMatchKey), primary_interface);
kern_return_t kern_result = IOServiceGetMatchingServices(
kIOMasterPortDefault, matching_dict.release(), matching_services);
return kern_result == KERN_SUCCESS;
}
bool GetMACAddressFromIterator(io_iterator_t primary_interface_iterator,
uint8_t* buffer, size_t buffer_size) {
if (buffer_size < kIOEthernetAddressSize)
return false;
bool success = false;
bzero(buffer, buffer_size);
base::mac::ScopedIOObject<io_object_t> primary_interface;
while (primary_interface.reset(IOIteratorNext(primary_interface_iterator)),
primary_interface) {
io_object_t primary_interface_parent;
kern_return_t kern_result = IORegistryEntryGetParentEntry(
primary_interface, kIOServicePlane, &primary_interface_parent);
base::mac::ScopedIOObject<io_object_t> primary_interface_parent_deleter(
primary_interface_parent);
success = kern_result == KERN_SUCCESS;
if (!success)
continue;
base::ScopedCFTypeRef<CFTypeRef> mac_data(
IORegistryEntryCreateCFProperty(primary_interface_parent,
CFSTR(kIOMACAddress),
kCFAllocatorDefault,
0));
CFDataRef mac_data_data = base::mac::CFCast<CFDataRef>(mac_data);
if (mac_data_data) {
CFDataGetBytes(
mac_data_data, CFRangeMake(0, kIOEthernetAddressSize), buffer);
}
}
return success;
}
bool GetMacAddress(unsigned char* buffer, size_t size) {
io_iterator_t primary_interface_iterator;
if (!FindEthernetInterfaces(&primary_interface_iterator))
return false;
bool result = GetMACAddressFromIterator(
primary_interface_iterator, buffer, size);
IOObjectRelease(primary_interface_iterator);
return result;
}
CFStringRef CopySerialNumber() {
base::mac::ScopedIOObject<io_service_t> expert_device(
IOServiceGetMatchingService(kIOMasterPortDefault,
IOServiceMatching("IOPlatformExpertDevice")));
if (!expert_device)
return NULL;
base::ScopedCFTypeRef<CFTypeRef> serial_number(
IORegistryEntryCreateCFProperty(expert_device,
CFSTR(kIOPlatformSerialNumberKey),
kCFAllocatorDefault,
0));
CFStringRef serial_number_cfstring =
base::mac::CFCast<CFStringRef>(serial_number);
if (!serial_number_cfstring)
return NULL;
ignore_result(serial_number.release());
return serial_number_cfstring;
}
} // namespace
bool GetRawMachineId(base::string16* data, int* more_data) {
uint8_t mac_address[kIOEthernetAddressSize];
data->clear();
if (GetMacAddress(mac_address, sizeof(mac_address))) {
*data += base::ASCIIToUTF16(
base::StringPrintf("mac:%02x%02x%02x%02x%02x%02x",
mac_address[0], mac_address[1], mac_address[2],
mac_address[3], mac_address[4], mac_address[5]));
}
// A MAC address is enough to uniquely identify a machine, but it's only 6
// bytes, 3 of which are manufacturer-determined. To make brute-forcing the
// SHA1 of this harder, also append the system's serial number.
CFStringRef serial = CopySerialNumber();
if (serial) {
if (!data->empty())
*data += base::UTF8ToUTF16(" ");
*data += base::UTF8ToUTF16("serial:") + base::SysCFStringRefToUTF16(serial);
CFRelease(serial);
}
// On windows, this is set to the volume id. Since it's not scrambled before
// being sent, just set it to 1.
*more_data = 1;
return true;
}
} // namespace rlz_lib
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