1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
// 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 "rlz/lib/machine_id.h"
#include <stddef.h>
#include "base/sha1.h"
#include "rlz/lib/assert.h"
#include "rlz/lib/crc8.h"
#include "rlz/lib/string_utils.h"
namespace rlz_lib {
bool GetMachineId(std::string* machine_id) {
if (!machine_id)
return false;
static std::string calculated_id;
static bool calculated = false;
if (calculated) {
*machine_id = calculated_id;
return true;
}
base::string16 sid_string;
int volume_id;
if (!GetRawMachineId(&sid_string, &volume_id))
return false;
if (!testing::GetMachineIdImpl(sid_string, volume_id, machine_id))
return false;
calculated = true;
calculated_id = *machine_id;
return true;
}
namespace testing {
bool GetMachineIdImpl(const base::string16& sid_string,
int volume_id,
std::string* machine_id) {
machine_id->clear();
// The ID should be the SID hash + the Hard Drive SNo. + checksum byte.
static const int kSizeWithoutChecksum = base::kSHA1Length + sizeof(int);
std::basic_string<unsigned char> id_binary(kSizeWithoutChecksum + 1, 0);
if (!sid_string.empty()) {
// In order to be compatible with the old version of RLZ, the hash of the
// SID must be done with all the original bytes from the unicode string.
// However, the chromebase SHA1 hash function takes only an std::string as
// input, so the unicode string needs to be converted to std::string
// "as is".
size_t byte_count = sid_string.size() * sizeof(base::string16::value_type);
const char* buffer = reinterpret_cast<const char*>(sid_string.c_str());
std::string sid_string_buffer(buffer, byte_count);
// Note that digest can have embedded nulls.
std::string digest(base::SHA1HashString(sid_string_buffer));
VERIFY(digest.size() == base::kSHA1Length);
std::copy(digest.begin(), digest.end(), id_binary.begin());
}
// Convert from int to binary (makes big-endian).
for (size_t i = 0; i < sizeof(int); i++) {
int shift_bits = 8 * (sizeof(int) - i - 1);
id_binary[base::kSHA1Length + i] = static_cast<unsigned char>(
(volume_id >> shift_bits) & 0xFF);
}
// Append the checksum byte.
if (!sid_string.empty() || (0 != volume_id))
rlz_lib::Crc8::Generate(id_binary.c_str(),
kSizeWithoutChecksum,
&id_binary[kSizeWithoutChecksum]);
return rlz_lib::BytesToString(
id_binary.c_str(), kSizeWithoutChecksum + 1, machine_id);
}
} // namespace testing
} // namespace rlz_lib
|
