2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include "internal/cryptlib_int.h"
11 #include "internal/thread_once.h"
13 struct openssl_ctx_onfree_list_st
{
14 openssl_ctx_onfree_fn
*fn
;
15 struct openssl_ctx_onfree_list_st
*next
;
18 struct openssl_ctx_st
{
23 * For most data in the OPENSSL_CTX we just use ex_data to store it. But
24 * that doesn't work for ex_data itself - so we store that directly.
26 OSSL_EX_DATA_GLOBAL global
;
28 /* Map internal static indexes to dynamically created indexes */
29 int dyn_indexes
[OPENSSL_CTX_MAX_INDEXES
];
31 CRYPTO_RWLOCK
*oncelock
;
32 int run_once_done
[OPENSSL_CTX_MAX_RUN_ONCE
];
33 int run_once_ret
[OPENSSL_CTX_MAX_RUN_ONCE
];
34 struct openssl_ctx_onfree_list_st
*onfreelist
;
38 static OPENSSL_CTX default_context_int
;
40 /* Always points at default_context_int if it has been initialised */
41 static OPENSSL_CTX
*default_context
= NULL
;
44 static int context_init(OPENSSL_CTX
*ctx
)
48 ctx
->lock
= CRYPTO_THREAD_lock_new();
49 if (ctx
->lock
== NULL
)
52 ctx
->oncelock
= CRYPTO_THREAD_lock_new();
53 if (ctx
->oncelock
== NULL
)
56 for (i
= 0; i
< OPENSSL_CTX_MAX_INDEXES
; i
++)
57 ctx
->dyn_indexes
[i
] = -1;
59 if (!do_ex_data_init(ctx
))
62 if (!crypto_new_ex_data_ex(ctx
, CRYPTO_EX_INDEX_OPENSSL_CTX
, NULL
,
64 crypto_cleanup_all_ex_data_int(ctx
);
70 CRYPTO_THREAD_lock_free(ctx
->oncelock
);
71 CRYPTO_THREAD_lock_free(ctx
->lock
);
76 static int context_deinit(OPENSSL_CTX
*ctx
)
78 struct openssl_ctx_onfree_list_st
*tmp
, *onfree
;
83 ossl_ctx_thread_stop(ctx
);
85 onfree
= ctx
->onfreelist
;
86 while (onfree
!= NULL
) {
89 onfree
= onfree
->next
;
92 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX
, NULL
, &ctx
->data
);
93 crypto_cleanup_all_ex_data_int(ctx
);
94 CRYPTO_THREAD_lock_free(ctx
->oncelock
);
95 CRYPTO_THREAD_lock_free(ctx
->lock
);
101 void openssl_ctx_default_deinit(void)
103 context_deinit(default_context
);
106 static CRYPTO_ONCE default_context_init
= CRYPTO_ONCE_STATIC_INIT
;
107 DEFINE_RUN_ONCE_STATIC(do_default_context_init
)
109 if (context_init(&default_context_int
))
110 default_context
= &default_context_int
;
116 OPENSSL_CTX
*OPENSSL_CTX_new(void)
118 OPENSSL_CTX
*ctx
= OPENSSL_zalloc(sizeof(*ctx
));
120 if (ctx
!= NULL
&& !context_init(ctx
)) {
121 OPENSSL_CTX_free(ctx
);
127 void OPENSSL_CTX_free(OPENSSL_CTX
*ctx
)
134 OPENSSL_CTX
*openssl_ctx_get_concrete(OPENSSL_CTX
*ctx
)
138 if (!RUN_ONCE(&default_context_init
, do_default_context_init
))
140 return default_context
;
146 static void openssl_ctx_generic_new(void *parent_ign
, void *ptr_ign
,
147 CRYPTO_EX_DATA
*ad
, int index
,
148 long argl_ign
, void *argp
)
150 const OPENSSL_CTX_METHOD
*meth
= argp
;
151 void *ptr
= meth
->new_func(crypto_ex_data_get_openssl_ctx(ad
));
154 CRYPTO_set_ex_data(ad
, index
, ptr
);
156 static void openssl_ctx_generic_free(void *parent_ign
, void *ptr
,
157 CRYPTO_EX_DATA
*ad
, int index
,
158 long argl_ign
, void *argp
)
160 const OPENSSL_CTX_METHOD
*meth
= argp
;
162 meth
->free_func(ptr
);
165 /* Non-static so we can use it in context_internal_test */
166 static int openssl_ctx_init_index(OPENSSL_CTX
*ctx
, int static_index
,
167 const OPENSSL_CTX_METHOD
*meth
)
171 ctx
= openssl_ctx_get_concrete(ctx
);
175 idx
= crypto_get_ex_new_index_ex(ctx
, CRYPTO_EX_INDEX_OPENSSL_CTX
, 0,
177 openssl_ctx_generic_new
,
178 NULL
, openssl_ctx_generic_free
);
182 ctx
->dyn_indexes
[static_index
] = idx
;
186 void *openssl_ctx_get_data(OPENSSL_CTX
*ctx
, int index
,
187 const OPENSSL_CTX_METHOD
*meth
)
191 ctx
= openssl_ctx_get_concrete(ctx
);
195 CRYPTO_THREAD_read_lock(ctx
->lock
);
197 if (ctx
->dyn_indexes
[index
] == -1
198 && !openssl_ctx_init_index(ctx
, index
, meth
)) {
199 CRYPTO_THREAD_unlock(ctx
->lock
);
203 /* The alloc call ensures there's a value there */
204 if (CRYPTO_alloc_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX
, NULL
,
205 &ctx
->data
, ctx
->dyn_indexes
[index
]))
206 data
= CRYPTO_get_ex_data(&ctx
->data
, ctx
->dyn_indexes
[index
]);
208 CRYPTO_THREAD_unlock(ctx
->lock
);
213 OSSL_EX_DATA_GLOBAL
*openssl_ctx_get_ex_data_global(OPENSSL_CTX
*ctx
)
215 ctx
= openssl_ctx_get_concrete(ctx
);
221 int openssl_ctx_run_once(OPENSSL_CTX
*ctx
, unsigned int idx
,
222 openssl_ctx_run_once_fn run_once_fn
)
224 int done
= 0, ret
= 0;
226 ctx
= openssl_ctx_get_concrete(ctx
);
230 CRYPTO_THREAD_read_lock(ctx
->oncelock
);
231 done
= ctx
->run_once_done
[idx
];
233 ret
= ctx
->run_once_ret
[idx
];
234 CRYPTO_THREAD_unlock(ctx
->oncelock
);
239 CRYPTO_THREAD_write_lock(ctx
->oncelock
);
240 if (ctx
->run_once_done
[idx
]) {
241 ret
= ctx
->run_once_ret
[idx
];
242 CRYPTO_THREAD_unlock(ctx
->oncelock
);
246 ret
= run_once_fn(ctx
);
247 ctx
->run_once_done
[idx
] = 1;
248 ctx
->run_once_ret
[idx
] = ret
;
249 CRYPTO_THREAD_unlock(ctx
->oncelock
);
254 int openssl_ctx_onfree(OPENSSL_CTX
*ctx
, openssl_ctx_onfree_fn onfreefn
)
256 struct openssl_ctx_onfree_list_st
*newonfree
257 = OPENSSL_malloc(sizeof(*newonfree
));
259 if (newonfree
== NULL
)
262 newonfree
->fn
= onfreefn
;
263 newonfree
->next
= ctx
->onfreelist
;
264 ctx
->onfreelist
= newonfree
;