1 | /* |
2 | * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved. |
3 | * |
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 |
8 | */ |
9 | |
10 | #include <stddef.h> |
11 | |
12 | #include <openssl/core.h> |
13 | #include "internal/cryptlib.h" |
14 | #include "internal/core.h" |
15 | #include "internal/property.h" |
16 | #include "internal/provider.h" |
17 | |
18 | struct construct_data_st { |
19 | OPENSSL_CTX *libctx; |
20 | OSSL_METHOD_STORE *store; |
21 | int operation_id; |
22 | int force_store; |
23 | OSSL_METHOD_CONSTRUCT_METHOD *mcm; |
24 | void *mcm_data; |
25 | }; |
26 | |
27 | static void ossl_method_construct_this(OSSL_PROVIDER *provider, |
28 | const OSSL_ALGORITHM *algo, |
29 | int no_store, void *cbdata) |
30 | { |
31 | struct construct_data_st *data = cbdata; |
32 | void *method = NULL; |
33 | |
34 | if ((method = data->mcm->construct(algo, provider, data->mcm_data)) |
35 | == NULL) |
36 | return; |
37 | |
38 | /* |
39 | * Note regarding putting the method in stores: |
40 | * |
41 | * we don't need to care if it actually got in or not here. |
42 | * If it didn't get in, it will simply not be available when |
43 | * ossl_method_construct() tries to get it from the store. |
44 | * |
45 | * It is *expected* that the put function increments the refcnt |
46 | * of the passed method. |
47 | */ |
48 | |
49 | if (data->force_store || !no_store) { |
50 | /* |
51 | * If we haven't been told not to store, |
52 | * add to the global store |
53 | */ |
54 | data->mcm->put(data->libctx, NULL, method, provider, |
55 | data->operation_id, algo->algorithm_names, |
56 | algo->property_definition, data->mcm_data); |
57 | } |
58 | |
59 | data->mcm->put(data->libctx, data->store, method, provider, |
60 | data->operation_id, algo->algorithm_names, |
61 | algo->property_definition, data->mcm_data); |
62 | |
63 | /* refcnt-- because we're dropping the reference */ |
64 | data->mcm->destruct(method, data->mcm_data); |
65 | } |
66 | |
67 | void *ossl_method_construct(OPENSSL_CTX *libctx, int operation_id, |
68 | int force_store, |
69 | OSSL_METHOD_CONSTRUCT_METHOD *mcm, void *mcm_data) |
70 | { |
71 | void *method = NULL; |
72 | |
73 | if ((method = mcm->get(libctx, NULL, mcm_data)) == NULL) { |
74 | struct construct_data_st cbdata; |
75 | |
76 | /* |
77 | * We have a temporary store to be able to easily search among new |
78 | * items, or items that should find themselves in the global store. |
79 | */ |
80 | if ((cbdata.store = mcm->alloc_tmp_store(libctx)) == NULL) |
81 | goto fin; |
82 | |
83 | cbdata.libctx = libctx; |
84 | cbdata.operation_id = operation_id; |
85 | cbdata.force_store = force_store; |
86 | cbdata.mcm = mcm; |
87 | cbdata.mcm_data = mcm_data; |
88 | ossl_algorithm_do_all(libctx, operation_id, NULL, |
89 | ossl_method_construct_this, &cbdata); |
90 | |
91 | method = mcm->get(libctx, cbdata.store, mcm_data); |
92 | mcm->dealloc_tmp_store(cbdata.store); |
93 | } |
94 | |
95 | fin: |
96 | return method; |
97 | } |
98 | |