154 lines
4.5 KiB
C++
154 lines
4.5 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#if !defined(__STDC_FORMAT_MACROS)
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#define __STDC_FORMAT_MACROS
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#endif
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#include "util/misc/uuid.h"
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#include <inttypes.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <type_traits>
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#include "base/rand_util.h"
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#include "base/strings/stringprintf.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/sys_byteorder.h"
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#include "build/build_config.h"
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#if BUILDFLAG(IS_APPLE)
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#include <uuid/uuid.h>
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#endif // BUILDFLAG(IS_APPLE)
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namespace crashpad {
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static_assert(sizeof(UUID) == 16, "UUID must be 16 bytes");
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static_assert(std::is_pod<UUID>::value, "UUID must be POD");
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bool UUID::operator==(const UUID& that) const {
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return memcmp(this, &that, sizeof(*this)) == 0;
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}
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bool UUID::operator<(const UUID& that) const {
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return memcmp(this, &that, sizeof(*this)) < 0;
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}
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void UUID::InitializeToZero() {
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memset(this, 0, sizeof(*this));
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}
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void UUID::InitializeFromBytes(const uint8_t* bytes) {
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memcpy(this, bytes, sizeof(*this));
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data_1 = base::NetToHost32(data_1);
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data_2 = base::NetToHost16(data_2);
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data_3 = base::NetToHost16(data_3);
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}
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bool UUID::InitializeFromString(const base::StringPiece& string) {
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if (string.length() != 36)
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return false;
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UUID temp;
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static constexpr char kScanFormat[] =
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"%08" SCNx32 "-%04" SCNx16 "-%04" SCNx16
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"-%02" SCNx8 "%02" SCNx8
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"-%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8;
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int rv = sscanf(string.data(),
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kScanFormat,
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&temp.data_1,
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&temp.data_2,
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&temp.data_3,
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&temp.data_4[0],
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&temp.data_4[1],
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&temp.data_5[0],
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&temp.data_5[1],
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&temp.data_5[2],
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&temp.data_5[3],
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&temp.data_5[4],
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&temp.data_5[5]);
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if (rv != 11)
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return false;
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*this = temp;
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return true;
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}
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#if BUILDFLAG(IS_WIN)
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bool UUID::InitializeFromString(const base::WStringPiece& string) {
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return InitializeFromString(WideToUTF8(string));
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}
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#endif
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bool UUID::InitializeWithNew() {
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#if BUILDFLAG(IS_APPLE)
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uuid_t uuid;
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uuid_generate(uuid);
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InitializeFromBytes(uuid);
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return true;
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#elif BUILDFLAG(IS_WIN) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \
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BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_FUCHSIA)
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// Linux, Android, and Fuchsia do not provide a UUID generator in a
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// widely-available system library. On Linux and Android, uuid_generate()
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// from libuuid is not available everywhere.
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// On Windows, do not use UuidCreate() to avoid a dependency on rpcrt4, so
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// that this function is usable early in DllMain().
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base::RandBytes(this, sizeof(*this));
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// Set six bits per RFC 4122 §4.4 to identify this as a pseudo-random UUID.
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data_3 = (4 << 12) | (data_3 & 0x0fff); // §4.1.3
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data_4[0] = 0x80 | (data_4[0] & 0x3f); // §4.1.1
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return true;
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#else
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#error Port.
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#endif // BUILDFLAG(IS_APPLE)
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}
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#if BUILDFLAG(IS_WIN)
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void UUID::InitializeFromSystemUUID(const ::UUID* system_uuid) {
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static_assert(sizeof(::UUID) == sizeof(UUID),
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"unexpected system uuid size");
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static_assert(offsetof(::UUID, Data1) == offsetof(UUID, data_1),
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"unexpected system uuid layout");
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memcpy(this, system_uuid, sizeof(*this));
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}
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#endif // BUILDFLAG(IS_WIN)
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std::string UUID::ToString() const {
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return base::StringPrintf("%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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data_1,
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data_2,
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data_3,
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data_4[0],
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data_4[1],
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data_5[0],
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data_5[1],
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data_5[2],
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data_5[3],
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data_5[4],
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data_5[5]);
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}
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#if BUILDFLAG(IS_WIN)
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std::wstring UUID::ToWString() const {
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return base::UTF8ToWide(ToString());
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}
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#endif // BUILDFLAG(IS_WIN)
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} // namespace crashpad
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