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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2014-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#include <stdio.h>
#include <string.h>
#include <openssl/opensslconf.h>
#include <erl_nif.h>
#include "crypto_callback.h"
#ifdef DEBUG
# define ASSERT(e) \
((void) ((e) ? 1 : (fprintf(stderr,"Assert '%s' failed at %s:%d\n",\
#e, __FILE__, __LINE__), abort(), 0)))
#else
# define ASSERT(e) ((void) 1)
#endif
#ifdef __GNUC__
# define INLINE __inline__
#elif defined(__WIN32__)
# define INLINE __forceinline
#else
# define INLINE
#endif
#ifdef __WIN32__
# define DLLEXPORT __declspec(dllexport)
#elif defined(__GNUC__) && __GNUC__ >= 4
# define DLLEXPORT __attribute__ ((visibility("default")))
#elif defined (__SUNPRO_C) && (__SUNPRO_C >= 0x550)
# define DLLEXPORT __global
#else
# define DLLEXPORT
#endif
/* to be dlsym'ed */
DLLEXPORT struct crypto_callbacks* get_crypto_callbacks(int nlocks);
static void nomem(size_t size, const char* op)
{
fprintf(stderr, "Out of memory abort. Crypto failed to %s %zu bytes.\r\n",
op, size);
abort();
}
static void* crypto_alloc(size_t size CCB_FILE_LINE_ARGS)
{
void *ret;
if ((ret = enif_alloc(size)) == NULL)
goto err;
return ret;
err:
if (size)
nomem(size, "allocate");
return NULL;
}
static void* crypto_realloc(void* ptr, size_t size CCB_FILE_LINE_ARGS)
{
void* ret = enif_realloc(ptr, size);
if (!ret && size)
nomem(size, "reallocate");
return ret;
}
static void crypto_free(void* ptr CCB_FILE_LINE_ARGS)
{
enif_free(ptr);
}
#ifdef OPENSSL_THREADS /* vvvvvvvvvvvvvvv OPENSSL_THREADS vvvvvvvvvvvvvvvv */
static ErlNifRWLock** lock_vec = NULL; /* Static locks used by openssl */
#include <openssl/crypto.h>
static INLINE void locking(int mode, ErlNifRWLock* lock)
{
switch (mode) {
case CRYPTO_LOCK|CRYPTO_READ:
enif_rwlock_rlock(lock);
break;
case CRYPTO_LOCK|CRYPTO_WRITE:
enif_rwlock_rwlock(lock);
break;
case CRYPTO_UNLOCK|CRYPTO_READ:
enif_rwlock_runlock(lock);
break;
case CRYPTO_UNLOCK|CRYPTO_WRITE:
enif_rwlock_rwunlock(lock);
break;
default:
ASSERT(!"Invalid lock mode");
}
}
static void locking_function(int mode, int n, const char *file, int line)
{
locking(mode, lock_vec[n]);
}
static unsigned long id_function(void)
{
return (unsigned long) enif_thread_self();
}
/* Dynamic locking, not used by current openssl version (0.9.8)
*/
static struct CRYPTO_dynlock_value* dyn_create_function(const char *file, int line)
{
return (struct CRYPTO_dynlock_value*) enif_rwlock_create("crypto_dyn");
}
static void dyn_lock_function(int mode, struct CRYPTO_dynlock_value* ptr,const char *file, int line)
{
locking(mode, (ErlNifRWLock*)ptr);
}
static void dyn_destroy_function(struct CRYPTO_dynlock_value *ptr, const char *file, int line)
{
enif_rwlock_destroy((ErlNifRWLock*)ptr);
}
#endif /* ^^^^^^^^^^^^^^^^^^^^^^ OPENSSL_THREADS ^^^^^^^^^^^^^^^^^^^^^^ */
DLLEXPORT struct crypto_callbacks* get_crypto_callbacks(int nlocks)
{
static int is_initialized = 0;
static struct crypto_callbacks the_struct = {
sizeof(struct crypto_callbacks),
&crypto_alloc,
&crypto_realloc,
&crypto_free,
#ifdef OPENSSL_THREADS
&locking_function,
&id_function,
&dyn_create_function,
&dyn_lock_function,
&dyn_destroy_function
#endif /* OPENSSL_THREADS */
};
if (!is_initialized) {
#ifdef OPENSSL_THREADS
if (nlocks > 0) {
int i;
lock_vec = enif_alloc(nlocks*sizeof(*lock_vec));
if (lock_vec==NULL) return NULL;
memset(lock_vec, 0, nlocks*sizeof(*lock_vec));
for (i=nlocks-1; i>=0; --i) {
lock_vec[i] = enif_rwlock_create("crypto_stat");
if (lock_vec[i]==NULL) return NULL;
}
}
#endif
is_initialized = 1;
}
return &the_struct;
}
#ifdef HAVE_DYNAMIC_CRYPTO_LIB
/* This is not really a NIF library, but we use ERL_NIF_INIT in order to
* get access to the erl_nif API (on Windows).
*/
static struct {
int dummy__;
ErlNifFunc funcv[0];
} empty;
ERL_NIF_INIT(dummy, empty.funcv, NULL, NULL, NULL, NULL)
#endif
|