sal/rtl/source/uuid.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2000, 2010 Oracle and/or its affiliates.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * This file is part of OpenOffice.org.
  10  *
  11  * OpenOffice.org is free software: you can redistribute it and/or modify
  12  * it under the terms of the GNU Lesser General Public License version 3
  13  * only, as published by the Free Software Foundation.
  14  *
  15  * OpenOffice.org is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU Lesser General Public License version 3 for more details
  19  * (a copy is included in the LICENSE file that accompanied this code).
  20  *
  21  * You should have received a copy of the GNU Lesser General Public License
  22  * version 3 along with OpenOffice.org.  If not, see
  23  * <http://www.openoffice.org/license.html>
  24  * for a copy of the LGPLv3 License.
  25  *
  26  ************************************************************************/
  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_sal.hxx"
  30
  31 #include <string.h>
  32 #include <stdlib.h>
  33
  34 #include <osl/mutex.hxx>
  35 #include <rtl/random.h>
  36 #include <rtl/uuid.h>
  37 #include <rtl/digest.h>
  38
  39 #define SWAP_INT32_TO_NETWORK(x)\
  40                { sal_uInt32 y = x;\
  41                  sal_uInt8 *p = (sal_uInt8 * )&(x); \
  42                  p[0] = (sal_uInt8) ( ( y >> 24 ) & 0xff );\
  43                  p[1] = (sal_uInt8) ( ( y >> 16 ) & 0xff );\
  44                  p[2] = (sal_uInt8) ( ( y >> 8 )  & 0xff );\
  45                  p[3] = (sal_uInt8) ( ( y ) & 0xff);\
  46                }
  47 #define SWAP_INT16_TO_NETWORK(x)\
  48                { sal_uInt16 y = x;\
  49                  sal_uInt8 *p = (sal_uInt8 * )&(x); \
  50                  p[0] = (sal_uInt8) ( ( y >> 8 )  & 0xff );\
  51                  p[1] = (sal_uInt8) ( ( y ) & 0xff);\
  52                }
  53
  54 #define SWAP_NETWORK_TO_INT16(x)\
  55                { sal_uInt16 y = x;\
  56                  sal_uInt8 *p = (sal_uInt8 * )&(y);\
  57                  x = ( ( ((sal_uInt16)p[0]) & 0xff) << 8 ) |\
  58                      ( (  (sal_uInt16)p[1]) & 0xff);\
  59                }
  60 #define SWAP_NETWORK_TO_INT32(x)\
  61                { sal_uInt32 y = x;\
  62                  sal_uInt8 *p = (sal_uInt8 * )&(y); \
  63                  x = ( ( ((sal_uInt32)p[0]) & 0xff) << 24 ) |\
  64                      ( ( ((sal_uInt32)p[1]) & 0xff) << 16 ) |\
  65                      ( ( ((sal_uInt32)p[2]) & 0xff) << 8  ) |\
  66                      ( (  (sal_uInt32)p[3]) & 0xff);\
  67                }
  68
  69 typedef struct _UUID
  70 {
  71       sal_uInt32          time_low;
  72       sal_uInt16          time_mid;
  73       sal_uInt16          time_hi_and_version;
  74       sal_uInt8           clock_seq_hi_and_reserved;
  75       sal_uInt8           clock_seq_low;
  76       sal_uInt8           node[6];
  77 } UUID;
  78
  79 static  void write_v3( sal_uInt8 *pUuid  )
  80 {
  81     UUID uuid;
  82     // copy to avoid alignment problems
  83     memcpy( &uuid , pUuid , 16 );
  84
  85     SWAP_NETWORK_TO_INT32( uuid.time_low );
  86     SWAP_NETWORK_TO_INT16( uuid.time_mid );
  87     SWAP_NETWORK_TO_INT16( uuid.time_hi_and_version );
  88
  89     /* put in the variant and version bits */
  90     uuid.time_hi_and_version       &= 0x0FFF;
  91     uuid.time_hi_and_version       |= (3 << 12);
  92     uuid.clock_seq_hi_and_reserved &= 0x3F;
  93     uuid.clock_seq_hi_and_reserved |= 0x80;
  94
  95     SWAP_INT32_TO_NETWORK( uuid.time_low );
  96     SWAP_INT16_TO_NETWORK( uuid.time_mid );
  97     SWAP_INT16_TO_NETWORK( uuid.time_hi_and_version );
  98
  99     memcpy( pUuid , &uuid , 16 );
 100 }
 101
 102
 103 extern "C" void SAL_CALL rtl_createUuid( sal_uInt8 *pTargetUUID ,
 104                                          const sal_uInt8 *, sal_Bool )
 105 {
 106     {
 107         osl::MutexGuard g(osl::Mutex::getGlobalMutex());
 108         static rtlRandomPool pool = NULL;
 109         if (pool == NULL) {
 110             pool = rtl_random_createPool();
 111             if (pool == NULL) {
 112                 abort();
 113                     // only possible way to signal failure here (rtl_createUuid
 114                     // being part of a fixed C API)
 115             }
 116         }
 117         if (rtl_random_getBytes(pool, pTargetUUID, 16) != rtl_Random_E_None) {
 118             abort();
 119                 // only possible way to signal failure here (rtl_createUuid
 120                 // being part of a fixed C API)
 121         }
 122     }
 123     // See ITU-T Recommendation X.667:
 124     pTargetUUID[6] &= 0x0F;
 125     pTargetUUID[6] |= 0x40;
 126     pTargetUUID[8] &= 0x3F;
 127     pTargetUUID[8] |= 0x80;
 128 }
 129
 130
 131 extern "C" void SAL_CALL rtl_createNamedUuid( sal_uInt8  *pTargetUUID,
 132                                               const sal_uInt8  *pNameSpaceUUID,
 133                                               const rtl_String *pName )
 134 {
 135     rtlDigest digest = rtl_digest_createMD5  ();
 136
 137     rtl_digest_updateMD5( digest, pNameSpaceUUID , 16 );
 138     rtl_digest_updateMD5( digest, pName->buffer , pName->length );
 139
 140     rtl_digest_getMD5( digest, pTargetUUID , 16 );
 141     rtl_digest_destroyMD5 (digest);
 142
 143     write_v3(pTargetUUID);
 144 }
 145
 146
 147
 148 extern "C" sal_Int32 SAL_CALL rtl_compareUuid( const sal_uInt8 *pUUID1 , const sal_uInt8 *pUUID2 )
 149 {
 150     int i;
 151     UUID u1;
 152     UUID u2;
 153     memcpy( &u1 , pUUID1 , 16 );
 154     memcpy( &u2 , pUUID2 , 16 );
 155
 156     SWAP_NETWORK_TO_INT32( u1.time_low );
 157     SWAP_NETWORK_TO_INT16( u1.time_mid );
 158     SWAP_NETWORK_TO_INT16( u1.time_hi_and_version );
 159
 160     SWAP_NETWORK_TO_INT32( u2.time_low );
 161     SWAP_NETWORK_TO_INT16( u2.time_mid );
 162     SWAP_NETWORK_TO_INT16( u2.time_hi_and_version );
 163
 164 #define CHECK(f1, f2) if (f1 != f2) return f1 < f2 ? -1 : 1;
 165     CHECK(u1.time_low, u2.time_low);
 166     CHECK(u1.time_mid, u2.time_mid);
 167     CHECK(u1.time_hi_and_version, u2.time_hi_and_version);
 168     CHECK(u1.clock_seq_hi_and_reserved, u2.clock_seq_hi_and_reserved);
 169     CHECK(u1.clock_seq_low, u2.clock_seq_low);
 170     for (i = 0; i < 6; i++)
 171     {
 172         if (u1.node[i] < u2.node[i])
 173             return -1;
 174         if (u1.node[i] > u2.node[i])
 175             return 1;
 176     }
 177     return 0;
 178
 179 }
 180