This source file includes following definitions.
- evutil_secure_rng_set_urandom_device_file
- evutil_secure_rng_init
- evutil_secure_rng_global_setup_locks_
- ev_arc4random_buf
- evutil_secure_rng_global_setup_locks_
- evutil_secure_rng_set_urandom_device_file
- evutil_secure_rng_init
- ev_arc4random_buf
- evutil_secure_rng_get_bytes
- evutil_secure_rng_add_bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35 #include "event2/event-config.h"
36
37 #include <limits.h>
38
39 #include "util-internal.h"
40 #include "evthread-internal.h"
41
42 #ifdef _EVENT_HAVE_ARC4RANDOM
43 #include <stdlib.h>
44 #include <string.h>
45 int
46 evutil_secure_rng_set_urandom_device_file(char *fname)
47 {
48 (void) fname;
49 return -1;
50 }
51 int
52 evutil_secure_rng_init(void)
53 {
54
55 (void) arc4random();
56 return 0;
57 }
58 int
59 evutil_secure_rng_global_setup_locks_(const int enable_locks)
60 {
61 return 0;
62 }
63
64 static void
65 ev_arc4random_buf(void *buf, size_t n)
66 {
67 #if defined(_EVENT_HAVE_ARC4RANDOM_BUF) && !defined(__APPLE__)
68 return arc4random_buf(buf, n);
69 #else
70 unsigned char *b = buf;
71
72 #if defined(_EVENT_HAVE_ARC4RANDOM_BUF)
73
74
75
76
77
78
79 {
80 void (*tptr)(void *,size_t) =
81 (void (*)(void*,size_t))arc4random_buf;
82 if (tptr != NULL) {
83 return arc4random_buf(buf, n);
84 }
85 }
86 #endif
87
88
89 if (n >= 4 && ((ev_uintptr_t)b) & 3) {
90 ev_uint32_t u = arc4random();
91 int n_bytes = 4 - (((ev_uintptr_t)b) & 3);
92 memcpy(b, &u, n_bytes);
93 b += n_bytes;
94 n -= n_bytes;
95 }
96 while (n >= 4) {
97 *(ev_uint32_t*)b = arc4random();
98 b += 4;
99 n -= 4;
100 }
101 if (n) {
102 ev_uint32_t u = arc4random();
103 memcpy(b, &u, n);
104 }
105 #endif
106 }
107
108 #else
109
110 #ifdef _EVENT_ssize_t
111 #define ssize_t _EVENT_SSIZE_t
112 #endif
113 #define ARC4RANDOM_EXPORT static
114 #define _ARC4_LOCK() EVLOCK_LOCK(arc4rand_lock, 0)
115 #define _ARC4_UNLOCK() EVLOCK_UNLOCK(arc4rand_lock, 0)
116 #ifndef _EVENT_DISABLE_THREAD_SUPPORT
117 static void *arc4rand_lock;
118 #endif
119
120 #define ARC4RANDOM_UINT32 ev_uint32_t
121 #define ARC4RANDOM_NOSTIR
122 #define ARC4RANDOM_NORANDOM
123 #define ARC4RANDOM_NOUNIFORM
124
125 #include "./arc4random.c"
126
127 #ifndef _EVENT_DISABLE_THREAD_SUPPORT
128 int
129 evutil_secure_rng_global_setup_locks_(const int enable_locks)
130 {
131 EVTHREAD_SETUP_GLOBAL_LOCK(arc4rand_lock, 0);
132 return 0;
133 }
134 #endif
135
136 int
137 evutil_secure_rng_set_urandom_device_file(char *fname)
138 {
139 #ifdef TRY_SEED_URANDOM
140 _ARC4_LOCK();
141 arc4random_urandom_filename = fname;
142 _ARC4_UNLOCK();
143 #endif
144 return 0;
145 }
146
147 int
148 evutil_secure_rng_init(void)
149 {
150 int val;
151
152 _ARC4_LOCK();
153 if (!arc4_seeded_ok)
154 arc4_stir();
155 val = arc4_seeded_ok ? 0 : -1;
156 _ARC4_UNLOCK();
157 return val;
158 }
159
160 static void
161 ev_arc4random_buf(void *buf, size_t n)
162 {
163 arc4random_buf(buf, n);
164 }
165
166 #endif
167
168 void
169 evutil_secure_rng_get_bytes(void *buf, size_t n)
170 {
171 ev_arc4random_buf(buf, n);
172 }
173
174
175
176
177
178 #if 0
179 void
180 evutil_secure_rng_add_bytes(const char *buf, size_t n)
181 {
182 arc4random_addrandom((unsigned char*)buf,
183 n>(size_t)INT_MAX ? INT_MAX : (int)n);
184 }
185 #endif