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 #ifndef ARRAYSIZE

    43 #define ARRAYSIZE(a)           (sizeof(a) / sizeof((a)[0]))

    44 #endif

    45 #elif OS(DARWIN)

    46 #include <CoreFoundation/CoreFoundation.h>

    47 #elif OS(LINUX)

    48 #include <stdio.h>

    49 #endif

    50 

    51 namespace WebCore {

    52 

    53 static const char uuidVersionRequired = '4';

    54 static const int uuidVersionIdentifierIndex = 14;

    55 

    56 String createCanonicalUUIDString()

    57 {

    58 #if PLATFORM(QT)

    59     QUuid uuid = QUuid::createUuid();

    60     String canonicalUuidStr = uuid.toString().mid(1, 36).toLower(); // remove opening and closing bracket and make it lower.

    61     ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);

    62     return canonicalUuidStr;

    63 #elif OS(WINDOWS)

    64     GUID uuid = { 0 };

    65     HRESULT hr = CoCreateGuid(&uuid);

    66     if (FAILED(hr))

    67         return String();

    68     wchar_t uuidStr[40];

    69     int num = StringFromGUID2(uuid, reinterpret_cast<LPOLESTR>(uuidStr), ARRAYSIZE(uuidStr));

    70     ASSERT(num == 39);

    71     String canonicalUuidStr = String(uuidStr + 1, num - 3).lower(); // remove opening and closing bracket and make it lower.

    72     ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);

    73     return canonicalUuidStr;

    74 #elif OS(DARWIN)

    75     CFUUIDRef uuid = CFUUIDCreate(0);

    76     CFStringRef uuidStrRef = CFUUIDCreateString(0, uuid);

    77     String uuidStr(uuidStrRef);

    78     CFRelease(uuidStrRef);

    79     CFRelease(uuid);

    80     String canonicalUuidStr = uuidStr.lower(); // make it lower.

    81     ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);

    82     return canonicalUuidStr;

    83 #elif OS(LINUX)

    84     FILE* fptr = fopen("/proc/sys/kernel/random/uuid", "r");

    85     if (!fptr)

    86         return String();

    87     char uuidStr[37] = {0};

    88     if (!fgets(uuidStr, sizeof(uuidStr) - 1, fptr))

    89         return String();

    90     fclose(fptr);

    91     String canonicalUuidStr = String(uuidStr).lower(); // make it lower.

    92     ASSERT(canonicalUuidStr[uuidVersionIdentifierIndex] == uuidVersionRequired);

    93     return canonicalUuidStr;

    94 #else

    95     notImplemented();

    96     return String();

    97 #endif    

    98 }

    99 

   100 }