1=pod 2 3=head1 NAME 4 5OSSL_STORE_expect, 6OSSL_STORE_supports_search, 7OSSL_STORE_find 8- Specify what object type is expected 9 10=head1 SYNOPSIS 11 12 #include <openssl/store.h> 13 14 int OSSL_STORE_expect(OSSL_STORE_CTX *ctx, int expected_type); 15 16 int OSSL_STORE_supports_search(OSSL_STORE_CTX *ctx, int criterion_type); 17 18 int OSSL_STORE_find(OSSL_STORE_CTX *ctx, OSSL_STORE_SEARCH *search); 19 20=head1 DESCRIPTION 21 22OSSL_STORE_expect() helps applications filter what OSSL_STORE_load() returns 23by specifying a B<OSSL_STORE_INFO> type. 24By default, no expectations on the types of objects to be loaded are made. 25I<expected_type> may be 0 to indicate explicitly that no expectation is made, 26or it may be any of the known object types (see 27L<OSSL_STORE_INFO(3)/SUPPORTED OBJECTS>) except for B<OSSL_STORE_INFO_NAME>. 28For example, if C<file:/foo/bar/store.pem> contains several objects of different 29type and only certificates are interesting, the application can simply say 30that it expects the type B<OSSL_STORE_INFO_CERT>. 31 32OSSL_STORE_find() helps applications specify a criterion for a more fine 33grained search of objects. 34 35OSSL_STORE_supports_search() checks if the loader of the given OSSL_STORE 36context supports the given search type. 37See L<OSSL_STORE_SEARCH(3)/SUPPORTED CRITERION TYPES> for information on the 38supported search criterion types. 39 40OSSL_STORE_expect() and OSSL_STORE_find I<must> be called before the first 41OSSL_STORE_load() of a given session, or they will fail. 42 43=head1 NOTES 44 45If a more elaborate filter is required by the application, a better choice 46would be to use a post-processing function. 47See L<OSSL_STORE_open(3)> for more information. 48 49However, some loaders may take advantage of the knowledge of an expected type 50to make object retrieval more efficient, so if a single type is expected, this 51method is usually preferable. 52 53=head1 RETURN VALUES 54 55OSSL_STORE_expect() returns 1 on success, or 0 on failure. 56 57OSSL_STORE_supports_search() returns 1 if the criterion is supported, or 0 58otherwise. 59 60OSSL_STORE_find() returns 1 on success, or 0 on failure. 61 62=head1 SEE ALSO 63 64L<ossl_store(7)>, L<OSSL_STORE_INFO(3)>, L<OSSL_STORE_SEARCH(3)>, 65L<OSSL_STORE_load(3)> 66 67=head1 HISTORY 68 69OSSL_STORE_expect(), OSSL_STORE_supports_search() and OSSL_STORE_find() 70were added in OpenSSL 1.1.1. 71 72=head1 COPYRIGHT 73 74Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved. 75 76Licensed under the Apache License 2.0 (the "License"). You may not use 77this file except in compliance with the License. You can obtain a copy 78in the file LICENSE in the source distribution or at 79L<https://www.openssl.org/source/license.html>. 80 81=cut 82
