1 /**************************************************************************/
2 /* ---------------------------------------------------------------------- */
3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners: */
5 /* Universidad de Cantabria, SPAIN */
6 /* University of York, UK */
7 /* Scuola Superiore Sant'Anna, ITALY */
8 /* Kaiserslautern University, GERMANY */
9 /* Univ. Politécnica Valencia, SPAIN */
10 /* Czech Technical University in Prague, CZECH REPUBLIC */
12 /* Thales Communication S.A. FRANCE */
13 /* Visual Tools S.A. SPAIN */
14 /* Rapita Systems Ltd UK */
17 /* See http://www.frescor.org for a link to partners' websites */
19 /* FRESCOR project (FP6/2005/IST/5-034026) is funded */
20 /* in part by the European Union Sixth Framework Programme */
21 /* The European Union is not liable of any use that may be */
22 /* made of this code. */
25 /* This file is part of FORB (Frescor Object Request Broker) */
27 /* FORB is free software; you can redistribute it and/or modify it */
28 /* under terms of the GNU General Public License as published by the */
29 /* Free Software Foundation; either version 2, or (at your option) any */
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31 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty */
32 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
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34 /* copy of the GNU General Public License along with FORB; see file */
35 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
36 /* Cambridge, MA 02139, USA. */
38 /* As a special exception, including FORB header files in a file, */
39 /* instantiating FORB generics or templates, or linking other files */
40 /* with FORB objects to produce an executable application, does not */
41 /* by itself cause the resulting executable application to be covered */
42 /* by the GNU General Public License. This exception does not */
43 /* however invalidate any other reasons why the executable file might be */
44 /* covered by the GNU Public License. */
45 /**************************************************************************/
49 * @author Michal Sojka <sojkam1@fel.cvut.cz>
50 * @date Tue Aug 26 09:17:31 2008
52 * @brief Unix version of UUID generator
55 #include <forb/uuid.h>
59 #include <sys/types.h>
65 * Generates universally unique ID.
67 * @param dest Where to store the newly generated UUID.
69 * @return Same as @a dest.
71 forb_uuid_t *forb_uuid_generate(forb_uuid_t *dest)
76 unsigned char digest[20];
82 SHA1Update(&ctx, (unsigned char*)&tv, sizeof(tv));
83 SHA1Update(&ctx, (unsigned char*)&pid, sizeof(pid));
85 /* Crank the random number generator a few times */
87 for (i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--) {
89 SHA1Update(&ctx, (unsigned char*)&r, sizeof(r));
92 /* Also try to use /dev/urnadom to get some randomnes */
94 /* This should be enough for localhost process.
95 * TODO: Add network addresses for distributed operation! */
96 SHA1Final(digest, &ctx);
97 memcpy(dest, digest, sizeof(forb_uuid_t));
102 * Converts UUID to string.
104 * @param dest Where to store the result.
105 * @param uuid The UUID to convert.
106 * @param n Size of @a dest buffer.
108 * @return The same value as @a dest.
110 char *forb_uuid_to_string(char *dest, const forb_uuid_t *uuid, size_t n)
113 for (i = 0; i<sizeof(uuid->byte) && 2*(i+1) < n; i++)
114 sprintf(dest + 2*i, "%02hhx", uuid->byte[i]);
119 static inline int hexval(char c)
121 if (c >= '0' && c <= '9')
123 if (c >= 'a' && c <= 'f')
125 if (c >= 'A' && c <= 'F')
131 * Creates UUID from string form.
133 * @param dest Where to store the UUID.
134 * @param string UUID in the string form.
136 * @return @a dest in case of success, NULL in case of error.
138 forb_uuid_t *forb_uuid_from_string(forb_uuid_t *dest, const char *string)
142 for (i = 0; i<sizeof(dest->byte); i++) {
144 a = hexval(string[2*i]);
147 b = hexval(string[2*i+1]);
151 dest->byte[i] = (a << 4) + b;