xref: /aoo42x/main/sal/rtl/source/uuid.cxx (revision 87d2adbc)
1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_sal.hxx"
26 
27 #include <string.h>
28 #include <stdlib.h>
29 
30 #include <osl/mutex.hxx>
31 #include <rtl/random.h>
32 #include <rtl/uuid.h>
33 #include <rtl/digest.h>
34 
35 #define SWAP_INT32_TO_NETWORK(x)\
36                { sal_uInt32 y = x;\
37 				 sal_uInt8 *p = (sal_uInt8 * )&(x); \
38 				 p[0] = (sal_uInt8) ( ( y >> 24 ) & 0xff );\
39                  p[1] = (sal_uInt8) ( ( y >> 16 ) & 0xff );\
40                  p[2] = (sal_uInt8) ( ( y >> 8 )  & 0xff );\
41                  p[3] = (sal_uInt8) ( ( y ) & 0xff);\
42                }
43 #define SWAP_INT16_TO_NETWORK(x)\
44                { sal_uInt16 y = x;\
45 				 sal_uInt8 *p = (sal_uInt8 * )&(x); \
46                  p[0] = (sal_uInt8) ( ( y >> 8 )  & 0xff );\
47                  p[1] = (sal_uInt8) ( ( y ) & 0xff);\
48                }
49 
50 #define SWAP_NETWORK_TO_INT16(x)\
51                { sal_uInt16 y = x;\
52 				 sal_uInt8 *p = (sal_uInt8 * )&(y);\
53                  x = ( ( ((sal_uInt16)p[0]) & 0xff) << 8 ) |\
54                      ( (  (sal_uInt16)p[1]) & 0xff);\
55                }
56 #define SWAP_NETWORK_TO_INT32(x)\
57                { sal_uInt32 y = x;\
58 				 sal_uInt8 *p = (sal_uInt8 * )&(y); \
59                  x = ( ( ((sal_uInt32)p[0]) & 0xff) << 24 ) |\
60                      ( ( ((sal_uInt32)p[1]) & 0xff) << 16 ) |\
61                      ( ( ((sal_uInt32)p[2]) & 0xff) << 8  ) |\
62                      ( (  (sal_uInt32)p[3]) & 0xff);\
63                }
64 
65 typedef struct _UUID
66 {
67       sal_uInt32          time_low;
68       sal_uInt16          time_mid;
69       sal_uInt16          time_hi_and_version;
70       sal_uInt8           clock_seq_hi_and_reserved;
71       sal_uInt8           clock_seq_low;
72       sal_uInt8           node[6];
73 } UUID;
74 
write_v3(sal_uInt8 * pUuid)75 static  void write_v3( sal_uInt8 *pUuid  )
76 {
77     UUID uuid;
78 	// copy to avoid alignment problems
79     memcpy( &uuid , pUuid , 16 );
80 
81 	SWAP_NETWORK_TO_INT32( uuid.time_low );
82 	SWAP_NETWORK_TO_INT16( uuid.time_mid );
83 	SWAP_NETWORK_TO_INT16( uuid.time_hi_and_version );
84 
85     /* put in the variant and version bits */
86 	uuid.time_hi_and_version       &= 0x0FFF;
87 	uuid.time_hi_and_version       |= (3 << 12);
88 	uuid.clock_seq_hi_and_reserved &= 0x3F;
89 	uuid.clock_seq_hi_and_reserved |= 0x80;
90 
91 	SWAP_INT32_TO_NETWORK( uuid.time_low );
92 	SWAP_INT16_TO_NETWORK( uuid.time_mid );
93 	SWAP_INT16_TO_NETWORK( uuid.time_hi_and_version );
94 
95 	memcpy( pUuid , &uuid , 16 );
96 }
97 
98 
rtl_createUuid(sal_uInt8 * pTargetUUID,const sal_uInt8 *,sal_Bool)99 extern "C" void SAL_CALL rtl_createUuid( sal_uInt8 *pTargetUUID ,
100                                          const sal_uInt8 *, sal_Bool )
101 {
102     {
103         osl::MutexGuard g(osl::Mutex::getGlobalMutex());
104         static rtlRandomPool pool = NULL;
105         if (pool == NULL) {
106             pool = rtl_random_createPool();
107             if (pool == NULL) {
108                 abort();
109                     // only possible way to signal failure here (rtl_createUuid
110                     // being part of a fixed C API)
111             }
112         }
113         if (rtl_random_getBytes(pool, pTargetUUID, 16) != rtl_Random_E_None) {
114             abort();
115                 // only possible way to signal failure here (rtl_createUuid
116                 // being part of a fixed C API)
117         }
118     }
119     // See ITU-T Recommendation X.667:
120     pTargetUUID[6] &= 0x0F;
121     pTargetUUID[6] |= 0x40;
122     pTargetUUID[8] &= 0x3F;
123     pTargetUUID[8] |= 0x80;
124 }
125 
126 
rtl_createNamedUuid(sal_uInt8 * pTargetUUID,const sal_uInt8 * pNameSpaceUUID,const rtl_String * pName)127 extern "C" void SAL_CALL rtl_createNamedUuid( sal_uInt8  *pTargetUUID,
128                                               const sal_uInt8  *pNameSpaceUUID,
129                                               const rtl_String *pName )
130 {
131 	rtlDigest digest = rtl_digest_createMD5  ();
132 
133 	rtl_digest_updateMD5( digest, pNameSpaceUUID , 16 );
134 	rtl_digest_updateMD5( digest, pName->buffer , pName->length );
135 
136 	rtl_digest_getMD5( digest, pTargetUUID , 16 );
137 	rtl_digest_destroyMD5 (digest);
138 
139 	write_v3(pTargetUUID);
140 }
141 
142 
143 
rtl_compareUuid(const sal_uInt8 * pUUID1,const sal_uInt8 * pUUID2)144 extern "C" sal_Int32 SAL_CALL rtl_compareUuid( const sal_uInt8 *pUUID1 , const sal_uInt8 *pUUID2 )
145 {
146     int i;
147 	UUID u1;
148 	UUID u2;
149 	memcpy( &u1 , pUUID1 , 16 );
150 	memcpy( &u2 , pUUID2 , 16 );
151 
152 	SWAP_NETWORK_TO_INT32( u1.time_low );
153 	SWAP_NETWORK_TO_INT16( u1.time_mid );
154 	SWAP_NETWORK_TO_INT16( u1.time_hi_and_version );
155 
156 	SWAP_NETWORK_TO_INT32( u2.time_low );
157 	SWAP_NETWORK_TO_INT16( u2.time_mid );
158 	SWAP_NETWORK_TO_INT16( u2.time_hi_and_version );
159 
160 #define CHECK(f1, f2) if (f1 != f2) return f1 < f2 ? -1 : 1;
161     CHECK(u1.time_low, u2.time_low);
162     CHECK(u1.time_mid, u2.time_mid);
163     CHECK(u1.time_hi_and_version, u2.time_hi_and_version);
164     CHECK(u1.clock_seq_hi_and_reserved, u2.clock_seq_hi_and_reserved);
165     CHECK(u1.clock_seq_low, u2.clock_seq_low);
166     for (i = 0; i < 6; i++)
167 	{
168         if (u1.node[i] < u2.node[i])
169 			return -1;
170         if (u1.node[i] > u2.node[i])
171 			return 1;
172 	}
173     return 0;
174 
175 }
176 
177