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9e11fe0d RL |
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 int ossl_method_construct_this(OSSL_PROVIDER *provider, void *cbdata) | |
28 | { | |
29 | struct construct_data_st *data = cbdata; | |
30 | int no_store = 0; /* Assume caching is ok */ | |
31 | const OSSL_ALGORITHM *map = | |
32 | ossl_provider_query_operation(provider, data->operation_id, &no_store); | |
33 | ||
34 | while (map->algorithm_name != NULL) { | |
35 | const OSSL_ALGORITHM *thismap = map++; | |
36 | void *method = NULL; | |
37 | ||
dc46e3dd MC |
38 | if ((method = data->mcm->construct(thismap->algorithm_name, |
39 | thismap->implementation, provider, | |
40 | data->mcm_data)) == NULL) | |
9e11fe0d RL |
41 | continue; |
42 | ||
a3830831 RL |
43 | /* |
44 | * Note regarding putting the method in stores: | |
45 | * | |
46 | * we don't need to care if it actually got in or not here. | |
47 | * If it didn't get in, it will simply not be available when | |
48 | * ossl_method_construct() tries to get it from the store. | |
49 | * | |
50 | * It is *expected* that the put function increments the refcnt | |
51 | * of the passed method. | |
52 | */ | |
53 | ||
9e11fe0d RL |
54 | if (data->force_store || !no_store) { |
55 | /* | |
56 | * If we haven't been told not to store, | |
57 | * add to the global store | |
58 | */ | |
a3830831 RL |
59 | data->mcm->put(data->libctx, NULL, |
60 | thismap->property_definition, | |
61 | method, data->mcm_data); | |
9e11fe0d RL |
62 | } |
63 | ||
a3830831 RL |
64 | data->mcm->put(data->libctx, data->store, |
65 | thismap->property_definition, | |
66 | method, data->mcm_data); | |
67 | ||
68 | /* refcnt-- because we're dropping the reference */ | |
69 | data->mcm->destruct(method, data->mcm_data); | |
9e11fe0d RL |
70 | } |
71 | ||
72 | return 1; | |
73 | } | |
74 | ||
75 | void *ossl_method_construct(OPENSSL_CTX *libctx, int operation_id, | |
76 | const char *name, const char *propquery, | |
77 | int force_store, | |
78 | OSSL_METHOD_CONSTRUCT_METHOD *mcm, void *mcm_data) | |
79 | { | |
80 | void *method = NULL; | |
81 | ||
82 | if ((method = mcm->get(libctx, NULL, propquery, mcm_data)) == NULL) { | |
83 | struct construct_data_st cbdata; | |
84 | ||
85 | /* | |
86 | * We have a temporary store to be able to easily search among new | |
87 | * items, or items that should find themselves in the global store. | |
88 | */ | |
89 | if ((cbdata.store = mcm->alloc_tmp_store()) == NULL) | |
90 | goto fin; | |
91 | ||
92 | cbdata.libctx = libctx; | |
93 | cbdata.operation_id = operation_id; | |
94 | cbdata.force_store = force_store; | |
95 | cbdata.mcm = mcm; | |
96 | cbdata.mcm_data = mcm_data; | |
97 | ossl_provider_forall_loaded(libctx, ossl_method_construct_this, | |
98 | &cbdata); | |
99 | ||
100 | method = mcm->get(libctx, cbdata.store, propquery, mcm_data); | |
101 | mcm->dealloc_tmp_store(cbdata.store); | |
102 | } | |
103 | ||
104 | fin: | |
105 | return method; | |
106 | } |