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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 .
*/
#include <string.h>
#include <stdlib.h>
#include <osl/mutex.hxx>
#include <rtl/random.h>
#include <rtl/uuid.h>
#include <rtl/digest.h>
#define SWAP_INT32_TO_NETWORK(x)\
{ sal_uInt32 y = x;\
sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(x)); \
p[0] = static_cast<sal_uInt8>( ( y >> 24 ) & 0xff );\
p[1] = static_cast<sal_uInt8>( ( y >> 16 ) & 0xff );\
p[2] = static_cast<sal_uInt8>( ( y >> 8 ) & 0xff );\
p[3] = static_cast<sal_uInt8>( ( y ) & 0xff);\
}
#define SWAP_INT16_TO_NETWORK(x)\
{ sal_uInt16 y = x;\
sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(x)); \
p[0] = static_cast<sal_uInt8>( ( y >> 8 ) & 0xff );\
p[1] = static_cast<sal_uInt8>( ( y ) & 0xff);\
}
#define SWAP_NETWORK_TO_INT16(x)\
{ sal_uInt16 y = x;\
sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(y));\
x = ( ( (static_cast<sal_uInt16>(p[0])) & 0xff) << 8 ) |\
( ( static_cast<sal_uInt16>(p[1])) & 0xff);\
}
#define SWAP_NETWORK_TO_INT32(x)\
{ sal_uInt32 y = x;\
sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(y)); \
x = ( ( (static_cast<sal_uInt32>(p[0])) & 0xff) << 24 ) |\
( ( (static_cast<sal_uInt32>(p[1])) & 0xff) << 16 ) |\
( ( (static_cast<sal_uInt32>(p[2])) & 0xff) << 8 ) |\
( ( static_cast<sal_uInt32>(p[3])) & 0xff);\
}
namespace {
struct UUID
{
sal_uInt32 time_low;
sal_uInt16 time_mid;
sal_uInt16 time_hi_and_version;
sal_uInt8 clock_seq_hi_and_reserved;
sal_uInt8 clock_seq_low;
sal_uInt8 node[6];
};
}
static void write_v3( sal_uInt8 *pUuid )
{
UUID uuid;
// copy to avoid alignment problems
memcpy(&uuid, pUuid, 16);
SWAP_NETWORK_TO_INT32(uuid.time_low);
SWAP_NETWORK_TO_INT16(uuid.time_mid);
SWAP_NETWORK_TO_INT16(uuid.time_hi_and_version);
/* put in the variant and version bits */
uuid.time_hi_and_version &= 0x0FFF;
uuid.time_hi_and_version |= (3 << 12);
uuid.clock_seq_hi_and_reserved &= 0x3F;
uuid.clock_seq_hi_and_reserved |= 0x80;
SWAP_INT32_TO_NETWORK(uuid.time_low);
SWAP_INT16_TO_NETWORK(uuid.time_mid);
SWAP_INT16_TO_NETWORK(uuid.time_hi_and_version);
memcpy(pUuid, &uuid, 16);
}
extern "C" void SAL_CALL rtl_createUuid(sal_uInt8 *pTargetUUID ,
SAL_UNUSED_PARAMETER const sal_uInt8 *,
SAL_UNUSED_PARAMETER sal_Bool)
{
{
static rtlRandomPool pool = []() {
rtlRandomPool aPool = rtl_random_createPool();
if (!aPool)
{
abort();
// only possible way to signal failure here (rtl_createUuid
// being part of a fixed C API)
}
return aPool;
}();
osl::MutexGuard g(osl::Mutex::getGlobalMutex());
if (rtl_random_getBytes(pool, pTargetUUID, 16) != rtl_Random_E_None)
{
abort();
// only possible way to signal failure here (rtl_createUuid
// being part of a fixed C API)
}
}
// See ITU-T Recommendation X.667:
pTargetUUID[6] &= 0x0F;
pTargetUUID[6] |= 0x40;
pTargetUUID[8] &= 0x3F;
pTargetUUID[8] |= 0x80;
}
extern "C" void SAL_CALL rtl_createNamedUuid(sal_uInt8 *pTargetUUID,
const sal_uInt8 *pNameSpaceUUID,
const rtl_String *pName )
{
rtlDigest digest = rtl_digest_createMD5();
rtl_digest_updateMD5(digest, pNameSpaceUUID, 16);
rtl_digest_updateMD5(digest, pName->buffer, pName->length);
rtl_digest_getMD5(digest, pTargetUUID, 16);
rtl_digest_destroyMD5(digest);
write_v3(pTargetUUID);
}
extern "C" sal_Int32 SAL_CALL rtl_compareUuid(const sal_uInt8 *pUUID1, const sal_uInt8 *pUUID2)
{
int i;
UUID u1;
UUID u2;
memcpy(&u1, pUUID1, 16 );
memcpy(&u2, pUUID2, 16 );
SWAP_NETWORK_TO_INT32(u1.time_low);
SWAP_NETWORK_TO_INT16(u1.time_mid);
SWAP_NETWORK_TO_INT16(u1.time_hi_and_version);
SWAP_NETWORK_TO_INT32(u2.time_low);
SWAP_NETWORK_TO_INT16(u2.time_mid);
SWAP_NETWORK_TO_INT16(u2.time_hi_and_version);
#define CHECK(f1, f2) if (f1 != f2) return f1 < f2 ? -1 : 1;
CHECK(u1.time_low, u2.time_low);
CHECK(u1.time_mid, u2.time_mid);
CHECK(u1.time_hi_and_version, u2.time_hi_and_version);
CHECK(u1.clock_seq_hi_and_reserved, u2.clock_seq_hi_and_reserved);
CHECK(u1.clock_seq_low, u2.clock_seq_low);
for (i = 0; i < 6; i++)
{
if (u1.node[i] < u2.node[i])
return -1;
if (u1.node[i] > u2.node[i])
return 1;
}
return 0;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
