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// Copyright 2014 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#if !defined(__STDC_FORMAT_MACROS)
#define __STDC_FORMAT_MACROS
#endif
#include "util/misc/uuid.h"
#include <inttypes.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <type_traits>
#include "base/logging.h"
#include "base/rand_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/sys_byteorder.h"
#if defined(OS_MACOSX)
#include <uuid/uuid.h>
#endif // OS_MACOSX
namespace crashpad {
static_assert(sizeof(UUID) == 16, "UUID must be 16 bytes");
static_assert(std::is_pod<UUID>::value, "UUID must be POD");
bool UUID::operator==(const UUID& that) const {
return memcmp(this, &that, sizeof(*this)) == 0;
}
void UUID::InitializeToZero() {
memset(this, 0, sizeof(*this));
}
void UUID::InitializeFromBytes(const uint8_t* bytes) {
memcpy(this, bytes, sizeof(*this));
data_1 = base::NetToHost32(data_1);
data_2 = base::NetToHost16(data_2);
data_3 = base::NetToHost16(data_3);
}
bool UUID::InitializeFromString(const base::StringPiece& string) {
if (string.length() != 36)
return false;
UUID temp;
static constexpr char kScanFormat[] =
"%08" SCNx32 "-%04" SCNx16 "-%04" SCNx16
"-%02" SCNx8 "%02" SCNx8
"-%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8;
int rv = sscanf(string.data(),
kScanFormat,
&temp.data_1,
&temp.data_2,
&temp.data_3,
&temp.data_4[0],
&temp.data_4[1],
&temp.data_5[0],
&temp.data_5[1],
&temp.data_5[2],
&temp.data_5[3],
&temp.data_5[4],
&temp.data_5[5]);
if (rv != 11)
return false;
*this = temp;
return true;
}
bool UUID::InitializeFromString(const base::StringPiece16& string) {
return InitializeFromString(UTF16ToUTF8(string));
}
bool UUID::InitializeWithNew() {
#if defined(OS_MACOSX)
uuid_t uuid;
uuid_generate(uuid);
InitializeFromBytes(uuid);
return true;
#elif defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID) || \
defined(OS_FUCHSIA)
// Linux, Android, and Fuchsia do not provide a UUID generator in a
// widely-available system library. On Linux and Android, uuid_generate()
// from libuuid is not available everywhere.
// On Windows, do not use UuidCreate() to avoid a dependency on rpcrt4, so
// that this function is usable early in DllMain().
base::RandBytes(this, sizeof(*this));
// Set six bits per RFC 4122 §4.4 to identify this as a pseudo-random UUID.
data_3 = (4 << 12) | (data_3 & 0x0fff); // §4.1.3
data_4[0] = 0x80 | (data_4[0] & 0x3f); // §4.1.1
return true;
#else
#error Port.
#endif // OS_MACOSX
}
#if defined(OS_WIN)
void UUID::InitializeFromSystemUUID(const ::UUID* system_uuid) {
static_assert(sizeof(::UUID) == sizeof(UUID),
"unexpected system uuid size");
static_assert(offsetof(::UUID, Data1) == offsetof(UUID, data_1),
"unexpected system uuid layout");
memcpy(this, system_uuid, sizeof(*this));
}
#endif // OS_WIN
std::string UUID::ToString() const {
return base::StringPrintf("%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
data_1,
data_2,
data_3,
data_4[0],
data_4[1],
data_5[0],
data_5[1],
data_5[2],
data_5[3],
data_5[4],
data_5[5]);
}
#if defined(OS_WIN)
base::string16 UUID::ToString16() const {
return base::UTF8ToUTF16(ToString());
}
#endif // OS_WIN
} // namespace crashpad