1 /*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "UUID.h"
33
34 #include "NotImplemented.h"
35
36 #if PLATFORM(QT)
37 #include <QUuid>
38 #endif
39
40 #if OS(WINDOWS)
41 #include <objbase.h>
42 #elif OS(DARWIN) && USE(CF)
43 #include <CoreFoundation/CoreFoundation.h>
44 #elif OS(LINUX) && !PLATFORM(CHROMIUM)
45 #include <stdio.h>
46 #elif (OS(LINUX) && PLATFORM(CHROMIUM)) || (OS(DARWIN) && !USE(CF))
47 #include <wtf/HexNumber.h>
48 #include <wtf/RandomNumber.h>
49 #include <wtf/text/StringBuilder.h>
50 #endif
51
52 namespace WebCore {
53
54 static const char uuidVersionRequired = '4';
55 static const int uuidVersionIdentifierIndex = 14;
56
createCanonicalUUIDString()57 String createCanonicalUUIDString()
58 {
59 #if PLATFORM(QT) && !defined(QT_NO_QUUID_STRING)
60 QUuid uuid = QUuid::createUuid();
61 String canonicalUuidStr = uuid.toString().mid(1, 36).toLower(); // remove opening and closing bracket and make it lower.
62 ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);
63 return canonicalUuidStr;
64 #elif OS(WINDOWS)
65 GUID uuid = { 0 };
66 HRESULT hr = CoCreateGuid(&uuid);
67 if (FAILED(hr))
68 return String();
69 wchar_t uuidStr[40];
70 int num = StringFromGUID2(uuid, reinterpret_cast<LPOLESTR>(uuidStr), WTF_ARRAY_LENGTH(uuidStr));
71 ASSERT(num == 39);
72 String canonicalUuidStr = String(uuidStr + 1, num - 3).lower(); // remove opening and closing bracket and make it lower.
73 ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);
74 return canonicalUuidStr;
75 #elif OS(DARWIN) && USE(CF)
76 CFUUIDRef uuid = CFUUIDCreate(0);
77 CFStringRef uuidStrRef = CFUUIDCreateString(0, uuid);
78 String uuidStr(uuidStrRef);
79 CFRelease(uuidStrRef);
80 CFRelease(uuid);
81 String canonicalUuidStr = uuidStr.lower(); // make it lower.
82 ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);
83 return canonicalUuidStr;
84 #elif OS(LINUX) && !PLATFORM(CHROMIUM)
85 // This does not work for the linux system that turns on sandbox.
86 FILE* fptr = fopen("/proc/sys/kernel/random/uuid", "r");
87 if (!fptr)
88 return String();
89 char uuidStr[37];
90 char* result = fgets(uuidStr, sizeof(uuidStr), fptr);
91 fclose(fptr);
92 if (!result)
93 return String();
94 String canonicalUuidStr = String(uuidStr).lower(); // make it lower.
95 ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);
96 return canonicalUuidStr;
97 #elif (OS(LINUX) && PLATFORM(CHROMIUM)) || (OS(DARWIN) && !USE(CF))
98 unsigned randomData[4];
99 for (size_t i = 0; i < WTF_ARRAY_LENGTH(randomData); ++i)
100 randomData[i] = static_cast<unsigned>(randomNumber() * (std::numeric_limits<unsigned>::max() + 1.0));
101
102 // Format as Version 4 UUID.
103 StringBuilder builder;
104 appendUnsignedAsHexFixedSize(randomData[0], builder, 8, Lowercase);
105 builder.append("-");
106 appendUnsignedAsHexFixedSize(randomData[1] >> 16, builder, 4, Lowercase);
107 builder.append("-4");
108 appendUnsignedAsHexFixedSize(randomData[1] & 0x00000fff, builder, 3, Lowercase);
109 builder.append("-");
110 appendUnsignedAsHexFixedSize((randomData[2] >> 30) | 0x8, builder, 1, Lowercase);
111 appendUnsignedAsHexFixedSize((randomData[2] >> 16) & 0x00000fff, builder, 3, Lowercase);
112 builder.append("-");
113 appendUnsignedAsHexFixedSize(randomData[2] & 0x0000ffff, builder, 4, Lowercase);
114 appendUnsignedAsHexFixedSize(randomData[3], builder, 8, Lowercase);
115 builder.append("\n");
116 return builder.toString();
117 #else
118 notImplemented();
119 return String();
120 #endif
121 }
122
123 }
124