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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 | ||
d5e5e2ff SL |
34 | if (map == NULL) |
35 | return 0; | |
36 | ||
9e11fe0d RL |
37 | while (map->algorithm_name != NULL) { |
38 | const OSSL_ALGORITHM *thismap = map++; | |
39 | void *method = NULL; | |
40 | ||
dc46e3dd MC |
41 | if ((method = data->mcm->construct(thismap->algorithm_name, |
42 | thismap->implementation, provider, | |
43 | data->mcm_data)) == NULL) | |
9e11fe0d RL |
44 | continue; |
45 | ||
a3830831 RL |
46 | /* |
47 | * Note regarding putting the method in stores: | |
48 | * | |
49 | * we don't need to care if it actually got in or not here. | |
50 | * If it didn't get in, it will simply not be available when | |
51 | * ossl_method_construct() tries to get it from the store. | |
52 | * | |
53 | * It is *expected* that the put function increments the refcnt | |
54 | * of the passed method. | |
55 | */ | |
56 | ||
9e11fe0d RL |
57 | if (data->force_store || !no_store) { |
58 | /* | |
59 | * If we haven't been told not to store, | |
60 | * add to the global store | |
61 | */ | |
2ccb1b4e | 62 | data->mcm->put(data->libctx, NULL, method, data->operation_id, |
2e49c054 RL |
63 | thismap->algorithm_name, |
64 | thismap->property_definition, data->mcm_data); | |
9e11fe0d RL |
65 | } |
66 | ||
2ccb1b4e | 67 | data->mcm->put(data->libctx, data->store, method, data->operation_id, |
2e49c054 RL |
68 | thismap->algorithm_name, thismap->property_definition, |
69 | data->mcm_data); | |
a3830831 RL |
70 | |
71 | /* refcnt-- because we're dropping the reference */ | |
72 | data->mcm->destruct(method, data->mcm_data); | |
9e11fe0d RL |
73 | } |
74 | ||
75 | return 1; | |
76 | } | |
77 | ||
78 | void *ossl_method_construct(OPENSSL_CTX *libctx, int operation_id, | |
79 | const char *name, const char *propquery, | |
80 | int force_store, | |
81 | OSSL_METHOD_CONSTRUCT_METHOD *mcm, void *mcm_data) | |
82 | { | |
83 | void *method = NULL; | |
84 | ||
2e49c054 | 85 | if ((method = |
2ccb1b4e RL |
86 | mcm->get(libctx, NULL, operation_id, name, propquery, mcm_data)) |
87 | == NULL) { | |
9e11fe0d RL |
88 | struct construct_data_st cbdata; |
89 | ||
90 | /* | |
91 | * We have a temporary store to be able to easily search among new | |
92 | * items, or items that should find themselves in the global store. | |
93 | */ | |
1aedc35f | 94 | if ((cbdata.store = mcm->alloc_tmp_store(libctx)) == NULL) |
9e11fe0d RL |
95 | goto fin; |
96 | ||
97 | cbdata.libctx = libctx; | |
98 | cbdata.operation_id = operation_id; | |
99 | cbdata.force_store = force_store; | |
100 | cbdata.mcm = mcm; | |
101 | cbdata.mcm_data = mcm_data; | |
102 | ossl_provider_forall_loaded(libctx, ossl_method_construct_this, | |
103 | &cbdata); | |
104 | ||
2ccb1b4e RL |
105 | method = mcm->get(libctx, cbdata.store, operation_id, name, |
106 | propquery, mcm_data); | |
9e11fe0d RL |
107 | mcm->dealloc_tmp_store(cbdata.store); |
108 | } | |
109 | ||
110 | fin: | |
111 | return method; | |
112 | } |