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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 "base/ios/device_util.h"
#include <CommonCrypto/CommonDigest.h>
#import <Foundation/Foundation.h>
#include <ifaddrs.h>
#include <net/if_dl.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include "base/logging.h"
#include "base/string_util.h"
#include "base/stringprintf.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/memory/scoped_ptr.h"
#include "base/sys_string_conversions.h"
namespace {
// Client ID key in the user preferences.
NSString* const kClientIdPreferenceKey = @"ChromiumClientID";
// Default salt for device ids.
const char kDefaultSalt[] = "Salt";
} // namespace
namespace ios {
namespace device_util {
std::string GetPlatform() {
std::string platform;
size_t size = 0;
sysctlbyname("hw.machine", NULL, &size, NULL, 0);
sysctlbyname("hw.machine", WriteInto(&platform, size), &size, NULL, 0);
return platform;
}
bool IsRunningOnHighRamDevice() {
uint64_t memory_size = 0;
size_t size = sizeof(memory_size);
if (sysctlbyname("hw.memsize", &memory_size, &size, NULL, 0) == 0) {
// Anything >= 250M, call high ram.
return memory_size >= 250 * 1024 * 1024;
}
return false;
}
bool IsSingleCoreDevice() {
uint64_t cpu_number = 0;
size_t sizes = sizeof(cpu_number);
sysctlbyname("hw.physicalcpu", &cpu_number, &sizes, NULL, 0);
return cpu_number == 1;
}
std::string GetMacAddress(const std::string& interface_name) {
std::string mac_string;
struct ifaddrs* addresses;
if (getifaddrs(&addresses) == 0) {
for (struct ifaddrs* address = addresses; address;
address = address->ifa_next) {
if ((address->ifa_addr->sa_family == AF_LINK) &&
strcmp(interface_name.c_str(), address->ifa_name) == 0) {
const struct sockaddr_dl* found_address_struct =
reinterpret_cast<const struct sockaddr_dl*>(address->ifa_addr);
// |found_address_struct->sdl_data| contains the interface name followed
// by the interface address. The address part can be accessed based on
// the length of the name, that is, |found_address_struct->sdl_nlen|.
const unsigned char* found_address =
reinterpret_cast<const unsigned char*>(
&found_address_struct->sdl_data[
found_address_struct->sdl_nlen]);
int found_address_length = found_address_struct->sdl_alen;
for (int i = 0; i < found_address_length; ++i) {
if (i != 0)
mac_string.push_back(':');
base::StringAppendF(&mac_string, "%02X", found_address[i]);
}
break;
}
}
freeifaddrs(addresses);
}
return mac_string;
}
std::string GetRandomId() {
base::mac::ScopedCFTypeRef<CFUUIDRef>
uuid_object(CFUUIDCreate(kCFAllocatorDefault));
base::mac::ScopedCFTypeRef<CFStringRef> uuid_string(
CFUUIDCreateString(kCFAllocatorDefault, uuid_object));
return base::SysCFStringRefToUTF8(uuid_string);
}
std::string GetDeviceIdentifier(const char* salt) {
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
NSString* client_id = [defaults stringForKey:kClientIdPreferenceKey];
if (!client_id) {
client_id = base::SysUTF8ToNSString(GetRandomId());
[defaults setObject:client_id forKey:kClientIdPreferenceKey];
[defaults synchronize];
}
NSData* hash_data = [[NSString stringWithFormat:@"%@%s", client_id,
salt ? salt : kDefaultSalt] dataUsingEncoding:NSUTF8StringEncoding];
unsigned char hash[CC_SHA256_DIGEST_LENGTH];
CC_SHA256([hash_data bytes], [hash_data length], hash);
CFUUIDBytes* uuid_bytes = reinterpret_cast<CFUUIDBytes*>(hash);
base::mac::ScopedCFTypeRef<CFUUIDRef>
uuid_object(CFUUIDCreateFromUUIDBytes(kCFAllocatorDefault, *uuid_bytes));
base::mac::ScopedCFTypeRef<CFStringRef> device_id(
CFUUIDCreateString(kCFAllocatorDefault, uuid_object));
return base::SysCFStringRefToUTF8(device_id);
}
} // namespace device_util
} // namespace ios
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