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805e021f CE |
1 | /* |
2 | * Copyright (c) 2012 Your File System Inc. All rights reserved. | |
3 | */ | |
4 | ||
5 | #include <afsconfig.h> | |
6 | #include <afs/param.h> | |
7 | ||
8 | #include <roken.h> | |
9 | ||
10 | #ifdef HAVE_UUID_UUID_H | |
11 | # include <uuid/uuid.h> | |
12 | #endif | |
13 | ||
14 | #ifdef AFS_NT40_ENV | |
15 | # include <rpc.h> | |
16 | #endif | |
17 | ||
18 | #include <hcrypto/rand.h> | |
19 | ||
20 | #include "uuid.h" | |
21 | #include "jhash.h" | |
22 | ||
23 | static const opr_uuid_t nilUid = {{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; | |
24 | ||
25 | void | |
26 | opr_uuid_create(opr_uuid_t *uuid) | |
27 | { | |
28 | #if defined (AFS_NT40_ENV) | |
29 | struct opr_uuid_unpacked raw; | |
30 | ||
31 | UuidCreate((UUID *) &raw); | |
32 | opr_uuid_pack(uuid, &raw); | |
33 | ||
34 | #elif !defined(KERNEL) && defined(HAVE_UUID_GENERATE) | |
35 | ||
36 | uuid_generate(uuid->data); | |
37 | ||
38 | #else | |
39 | RAND_bytes(uuid->data, 16); | |
40 | ||
41 | uuid->data[6] = (uuid->data[6] & 0x0F) | 0x40; /* verison is 4 */ | |
42 | uuid->data[8] = (uuid->data[8] & 0x3F) | 0x80; /* variant is DCE */ | |
43 | #endif | |
44 | } | |
45 | ||
46 | int | |
47 | opr_uuid_isNil(const opr_uuid_t *uuid) | |
48 | { | |
49 | return opr_uuid_equal(uuid, &nilUid); | |
50 | } | |
51 | ||
52 | int | |
53 | opr_uuid_equal(const opr_uuid_t *uuid1, const opr_uuid_t *uuid2) | |
54 | { | |
55 | return memcmp(uuid1, uuid2, sizeof(opr_uuid_t)) == 0; | |
56 | } | |
57 | ||
58 | unsigned int | |
59 | opr_uuid_hash(const opr_uuid_t *uuid) | |
60 | { | |
61 | return opr_jhash_opaque(uuid->data, sizeof(uuid->data), 0); | |
62 | } | |
63 | ||
64 | #if !defined(KERNEL) | |
65 | int | |
66 | opr_uuid_toString(const opr_uuid_t *uuid, char **string) | |
67 | { | |
68 | unsigned const char *p; | |
69 | int r; | |
70 | ||
71 | p = uuid->data; | |
72 | r = asprintf(string, | |
73 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" | |
74 | "%02x%02x%02x%02x%02x%02x", | |
75 | p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], | |
76 | p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); | |
77 | if (r < 0) { | |
78 | *string = NULL; | |
79 | return ENOMEM; | |
80 | } | |
81 | return 0; | |
82 | } | |
83 | ||
84 | void | |
85 | opr_uuid_freeString(char *string) | |
86 | { | |
87 | free(string); | |
88 | } | |
89 | ||
90 | int | |
91 | opr_uuid_fromString(opr_uuid_t *uuid, const char *string) | |
92 | { | |
93 | unsigned int i[16]; | |
94 | int items, c; | |
95 | ||
96 | /* XXX - Traditionally, AFS has printed UUIDs as | |
97 | * 00000000-0000-00-00-00000000. We should perhaps also accept | |
98 | * that format here | |
99 | */ | |
100 | items = sscanf(string, | |
101 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" | |
102 | "%02x%02x%02x%02x%02x%02x", | |
103 | &i[0], &i[1], &i[2], &i[3], &i[4], &i[5], | |
104 | &i[6], &i[7], &i[8], &i[9], &i[10], &i[11], | |
105 | &i[12], &i[13], &i[14], &i[15]); | |
106 | if (items !=16) { | |
107 | /* Originally, AFS's printed UUIDs would take the form | |
108 | * 00000000-0000-0000-00-00-00000000. Also handle this. */ | |
109 | items = sscanf(string, | |
110 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x-%02x-" | |
111 | "%02x%02x%02x%02x%02x%02x", | |
112 | &i[0], &i[1], &i[2], &i[3], &i[4], &i[5], | |
113 | &i[6], &i[7], &i[8], &i[9], &i[10], &i[11], | |
114 | &i[12], &i[13], &i[14], &i[15]); | |
115 | } | |
116 | if (items !=16) | |
117 | return EINVAL; | |
118 | ||
119 | for (c=0; c<16; c++) | |
120 | uuid->data[c] = i[c]; | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | #endif | |
126 | ||
127 | void | |
128 | opr_uuid_pack(opr_uuid_t *uuid, const struct opr_uuid_unpacked *raw) | |
129 | { | |
130 | afs_uint32 intval; | |
131 | unsigned short shortval; | |
132 | ||
133 | intval = htonl(raw->time_low); | |
134 | memcpy(&uuid->data[0], &intval, sizeof(uint32_t)); | |
135 | ||
136 | shortval = htons(raw->time_mid); | |
137 | memcpy(&uuid->data[4], &shortval, sizeof(uint16_t)); | |
138 | ||
139 | shortval = htons(raw->time_hi_and_version); | |
140 | memcpy(&uuid->data[6], &shortval, sizeof(uint16_t)); | |
141 | ||
142 | uuid->data[8] = raw->clock_seq_hi_and_reserved; | |
143 | uuid->data[9] = raw->clock_seq_low; | |
144 | ||
145 | memcpy(&uuid->data[10], &raw->node, 6); | |
146 | } | |
147 | ||
148 | void | |
149 | opr_uuid_unpack(const opr_uuid_t *uuid, struct opr_uuid_unpacked *raw) | |
150 | { | |
151 | afs_uint32 intval; | |
152 | unsigned short shortval; | |
153 | ||
154 | memcpy(&intval, &uuid->data[0], sizeof(uint32_t)); | |
155 | raw->time_low = ntohl(intval); | |
156 | ||
157 | memcpy(&shortval, &uuid->data[4], sizeof(uint16_t)); | |
158 | raw->time_mid = ntohs(shortval); | |
159 | ||
160 | memcpy(&shortval, &uuid->data[6], sizeof(uint16_t)); | |
161 | raw->time_hi_and_version = ntohs(shortval); | |
162 | ||
163 | raw->clock_seq_hi_and_reserved = uuid->data[8]; | |
164 | raw->clock_seq_low = uuid->data[9]; | |
165 | ||
166 | memcpy(&raw->node, &uuid->data[10], 6); | |
167 | } | |
168 |