OSSL_STORE_EXPECT - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEOSSL_STORE_expect, OSSL_STORE_supports_search, OSSL_STORE_find ​− Specify what object type is expected
SYNOPSIS​ #include <openssl/store.h> ​ ​ int OSSL_STORE_expect(OSSL_STORE_CTX *ctx, int expected_type); ​ ​ int OSSL_STORE_supports_search(OSSL_STORE_CTX *ctx, int criterion_type); ​ ​ int OSSL_STORE_find(OSSL_STORE_CTX *ctx, OSSL_STORE_SEARCH *search);
DESCRIPTION​OSSL_STORE_expect() helps applications filter what OSSL_STORE_load() returns by specifying a OSSL_STORE_INFO type. For example, if file:/foo/bar/store.pem contains several different objects and only the certificates are interesting, the application can simply say that it expects the type OSSL_STORE_INFO_CERT. All known object types (see ‟SUPPORTED OBJECTS” in OSSL_STORE_INFO (3)) except for OSSL_STORE_INFO_NAME are supported. ​OSSL_STORE_find() helps applications specify a criterion for a more fine grained search of objects. ​OSSL_STORE_supports_search() checks if the loader of the given OSSL_STORE context supports the given search type. See ‟SUPPORTED CRITERION TYPES” in OSSL_STORE_SEARCH for information on the supported search criterion types. ​OSSL_STORE_expect() and OSSL_STORE_find must be called before the first ​OSSL_STORE_load() of a given session, or they will fail.
NOTESIf a more elaborate filter is required by the application, a better choice would be to use a post-processing function. See OSSL_STORE_open (3) for more information. However, some loaders may take advantage of the knowledge of an expected type to make object retrieval more efficient, so if a single type is expected, this method is usually preferable.
RETURN VALUES​OSSL_STORE_expect() returns 1 on success, or 0 on failure. ​OSSL_STORE_supports_search() returns 1 if the criterion is supported, or 0 otherwise. ​OSSL_STORE_find() returns 1 on success, or 0 on failure.
SEE ALSO​ossl_store (7), OSSL_STORE_INFO (3), OSSL_STORE_SEARCH (3), ​OSSL_STORE_load (3)
HISTORY​OSSL_STORE_expect(), OSSL_STORE_supports_search() and OSSL_STORE_find() were added in OpenSSL 1.1.1.
COPYRIGHTCopyright 2018−2019 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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