sal/rtl/source/uuid.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: uuid.cxx,v $
  10  * $Revision: 1.13 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_sal.hxx"
  33
  34 #include <string.h>
  35 #include <stdlib.h>
  36
  37 #include <osl/mutex.hxx>
  38 #include <rtl/random.h>
  39 #include <rtl/uuid.h>
  40 #include <rtl/digest.h>
  41
  42 #define SWAP_INT32_TO_NETWORK(x)\
  43                { sal_uInt32 y = x;\
  44                  sal_uInt8 *p = (sal_uInt8 * )&(x); \
  45                  p[0] = (sal_uInt8) ( ( y >> 24 ) & 0xff );\
  46                  p[1] = (sal_uInt8) ( ( y >> 16 ) & 0xff );\
  47                  p[2] = (sal_uInt8) ( ( y >> 8 )  & 0xff );\
  48                  p[3] = (sal_uInt8) ( ( y ) & 0xff);\
  49                }
  50 #define SWAP_INT16_TO_NETWORK(x)\
  51                { sal_uInt16 y = x;\
  52                  sal_uInt8 *p = (sal_uInt8 * )&(x); \
  53                  p[0] = (sal_uInt8) ( ( y >> 8 )  & 0xff );\
  54                  p[1] = (sal_uInt8) ( ( y ) & 0xff);\
  55                }
  56
  57 #define SWAP_NETWORK_TO_INT16(x)\
  58                { sal_uInt16 y = x;\
  59                  sal_uInt8 *p = (sal_uInt8 * )&(y);\
  60                  x = ( ( ((sal_uInt16)p[0]) & 0xff) << 8 ) |\
  61                      ( (  (sal_uInt16)p[1]) & 0xff);\
  62                }
  63 #define SWAP_NETWORK_TO_INT32(x)\
  64                { sal_uInt32 y = x;\
  65                  sal_uInt8 *p = (sal_uInt8 * )&(y); \
  66                  x = ( ( ((sal_uInt32)p[0]) & 0xff) << 24 ) |\
  67                      ( ( ((sal_uInt32)p[1]) & 0xff) << 16 ) |\
  68                      ( ( ((sal_uInt32)p[2]) & 0xff) << 8  ) |\
  69                      ( (  (sal_uInt32)p[3]) & 0xff);\
  70                }
  71
  72 typedef struct _UUID
  73 {
  74       sal_uInt32          time_low;
  75       sal_uInt16          time_mid;
  76       sal_uInt16          time_hi_and_version;
  77       sal_uInt8           clock_seq_hi_and_reserved;
  78       sal_uInt8           clock_seq_low;
  79       sal_uInt8           node[6];
  80 } UUID;
  81
  82 static  void write_v3( sal_uInt8 *pUuid  )
  83 {
  84     UUID uuid;
  85     // copy to avoid alignment problems
  86     memcpy( &uuid , pUuid , 16 );
  87
  88     SWAP_NETWORK_TO_INT32( uuid.time_low );
  89     SWAP_NETWORK_TO_INT16( uuid.time_mid );
  90     SWAP_NETWORK_TO_INT16( uuid.time_hi_and_version );
  91
  92     /* put in the variant and version bits */
  93     uuid.time_hi_and_version       &= 0x0FFF;
  94     uuid.time_hi_and_version       |= (3 << 12);
  95     uuid.clock_seq_hi_and_reserved &= 0x3F;
  96     uuid.clock_seq_hi_and_reserved |= 0x80;
  97
  98     SWAP_INT32_TO_NETWORK( uuid.time_low );
  99     SWAP_INT16_TO_NETWORK( uuid.time_mid );
 100     SWAP_INT16_TO_NETWORK( uuid.time_hi_and_version );
 101
 102     memcpy( pUuid , &uuid , 16 );
 103 }
 104
 105
 106 extern "C" void SAL_CALL rtl_createUuid( sal_uInt8 *pTargetUUID ,
 107                                          const sal_uInt8 *, sal_Bool )
 108 {
 109     {
 110         osl::MutexGuard g(osl::Mutex::getGlobalMutex());
 111         static rtlRandomPool pool = NULL;
 112         if (pool == NULL) {
 113             pool = rtl_random_createPool();
 114             if (pool == NULL) {
 115                 abort();
 116                     // only possible way to signal failure here (rtl_createUuid
 117                     // being part of a fixed C API)
 118             }
 119         }
 120         if (rtl_random_getBytes(pool, pTargetUUID, 16) != rtl_Random_E_None) {
 121             abort();
 122                 // only possible way to signal failure here (rtl_createUuid
 123                 // being part of a fixed C API)
 124         }
 125     }
 126     // See ITU-T Recommendation X.667:
 127     pTargetUUID[6] &= 0x0F;
 128     pTargetUUID[6] |= 0x40;
 129     pTargetUUID[8] &= 0x3F;
 130     pTargetUUID[8] |= 0x80;
 131 }
 132
 133
 134 extern "C" void SAL_CALL rtl_createNamedUuid( sal_uInt8  *pTargetUUID,
 135                                               const sal_uInt8  *pNameSpaceUUID,
 136                                               const rtl_String *pName )
 137 {
 138     rtlDigest digest = rtl_digest_createMD5  ();
 139
 140     rtl_digest_updateMD5( digest, pNameSpaceUUID , 16 );
 141     rtl_digest_updateMD5( digest, pName->buffer , pName->length );
 142
 143     rtl_digest_getMD5( digest, pTargetUUID , 16 );
 144     rtl_digest_destroyMD5 (digest);
 145
 146     write_v3(pTargetUUID);
 147 }
 148
 149
 150
 151 extern "C" sal_Int32 SAL_CALL rtl_compareUuid( const sal_uInt8 *pUUID1 , const sal_uInt8 *pUUID2 )
 152 {
 153     int i;
 154     UUID u1;
 155     UUID u2;
 156     memcpy( &u1 , pUUID1 , 16 );
 157     memcpy( &u2 , pUUID2 , 16 );
 158
 159     SWAP_NETWORK_TO_INT32( u1.time_low );
 160     SWAP_NETWORK_TO_INT16( u1.time_mid );
 161     SWAP_NETWORK_TO_INT16( u1.time_hi_and_version );
 162
 163     SWAP_NETWORK_TO_INT32( u2.time_low );
 164     SWAP_NETWORK_TO_INT16( u2.time_mid );
 165     SWAP_NETWORK_TO_INT16( u2.time_hi_and_version );
 166
 167 #define CHECK(f1, f2) if (f1 != f2) return f1 < f2 ? -1 : 1;
 168     CHECK(u1.time_low, u2.time_low);
 169     CHECK(u1.time_mid, u2.time_mid);
 170     CHECK(u1.time_hi_and_version, u2.time_hi_and_version);
 171     CHECK(u1.clock_seq_hi_and_reserved, u2.clock_seq_hi_and_reserved);
 172     CHECK(u1.clock_seq_low, u2.clock_seq_low);
 173     for (i = 0; i < 6; i++)
 174     {
 175         if (u1.node[i] < u2.node[i])
 176             return -1;
 177         if (u1.node[i] > u2.node[i])
 178             return 1;
 179     }
 180     return 0;
 181
 182 }
 183