5 OSSL_METHOD_STORE, ossl_method_store_new, ossl_method_store_free,
6 ossl_method_store_init, ossl_method_store_cleanup,
7 ossl_method_store_add, ossl_method_store_remove, ossl_method_store_fetch,
8 ossl_method_store_set_global_properties,
9 ossl_method_store_cache_get, ossl_method_store_cache_set
10 - implementation method store and query
14 #include "internal/property.h"
16 typedef struct ossl_method_store_st OSSL_METHOD_STORE;
18 OSSL_METHOD_STORE *ossl_method_store_new(OPENSSL_CTX *ctx);
19 void ossl_method_store_free(OSSL_METHOD_STORE *store);
20 int ossl_method_store_init(OPENSSL_CTX *ctx);
21 void ossl_method_store_cleanup(OPENSSL_CTX *ctx);
22 int ossl_method_store_add(OSSL_METHOD_STORE *store,
23 int nid, const char *properties, void *method,
24 int (*method_up_ref)(void *),
25 void (*method_destruct)(void *));
26 int ossl_method_store_remove(OSSL_METHOD_STORE *store,
27 int nid, const void *method);
28 int ossl_method_store_fetch(OSSL_METHOD_STORE *store,
29 int nid, const char *properties,
31 int ossl_method_store_set_global_properties(OSSL_METHOD_STORE *store,
32 const char *prop_query);
33 int ossl_method_store_cache_get(OSSL_METHOD_STORE *store, int nid,
34 const char *prop_query, void **method);
35 int ossl_method_store_cache_set(OSSL_METHOD_STORE *store, int nid,
36 const char *prop_query, void *method);
40 OSSL_METHOD_STORE stores methods that can be queried using properties and a
41 numeric identity (nid).
43 Methods are expected to be library internal structures.
44 It's left to the caller to define the exact contents.
46 Numeric identities are expected to be an algorithm identity for the methods.
47 It's left to the caller to define exactly what an algorithm is, and to allocate
48 these numeric identities accordingly.
50 The B<OSSL_METHOD_STORE> also holds an internal query cache, which is accessed
51 separately (see L</Cache Functions> below).
53 =head2 Store Functions
55 ossl_method_store_init() initialises the method store subsystem in the scope of
56 the library context B<ctx>.
58 ossl_method_store_cleanup() cleans up and shuts down the implementation method
59 store subsystem in the scope of the library context B<ctx>.
61 ossl_method_store_new() create a new empty method store using the supplied
62 B<ctx> to allow access to the required underlying property data.
64 ossl_method_store_free() frees resources allocated to B<store>.
66 ossl_method_store_add() adds the B<method> to the B<store> as an instance of an
67 algorithm indicated by B<nid> and the property definition B<properties>.
68 If the B<method_up_ref> function is given, it's called to increment the
69 reference count of the method.
70 If the B<method_destruct> function is given, it's called when this function
71 fails to add the method to the store, or later on when it is being released from
74 ossl_method_store_remove() removes the B<method> identified by B<nid> from the
77 ossl_method_store_fetch() queries B<store> for an method identified by B<nid>
78 that matches the property query B<prop_query>.
79 The result, if any, is returned in B<method>.
81 ossl_method_store_set_global_properties() sets method B<store> wide query
82 properties to B<prop_query>.
83 All subsequent fetches will need to meet both these global query properties
84 and the ones passed to the ossl_method_store_free().
86 =head2 Cache Functions
88 ossl_method_store_cache_get() queries the cache associated with the B<store>
89 for an method identified by B<nid> that matches the property query
91 The result, if any, is returned in B<method>.
93 ossl_method_store_cache_set() sets a cache entry identified by B<nid> with the
94 property query B<prop_query> in the B<store>.
95 Future cache gets will return the specified B<method>.
99 ossl_method_store_new() a new method store object or B<NULL> on failure.
101 ossl_method_store_free(), ossl_method_store_add(),
102 ossl_method_store_remove(), ossl_method_store_fetch(),
103 ossl_method_store_set_global_properties(), ossl_method_store_cache_get()
104 and ossl_method_store_cache_set() return B<1> on success and B<0> on error.
106 ossl_method_store_free() and ossl_method_store_cleanup() do not return values.
110 This functionality was added to OpenSSL 3.0.
114 Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
115 Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
117 Licensed under the Apache License 2.0 (the "License"). You may not use this
118 file except in compliance with the License. You can obtain a copy in the file
119 LICENSE in the source distribution or at
120 L<https://www.openssl.org/source/license.html>.