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Title "OSSL_STORE_EXPECT 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
OSSL_STORE_expect, OSSL_STORE_supports_search, OSSL_STORE_find \- Specify what object type is expected Header "SYNOPSIS" .Vb 1 #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); .Ve Header "DESCRIPTION" \fBOSSL_STORE_expect() helps applications filter what OSSL_STORE_load() returns by specifying a \s-1OSSL_STORE_INFO\s0 type. By default, no expectations on the types of objects to be loaded are made. \fIexpected_type may be 0 to indicate explicitly that no expectation is made, or it may be any of the known object types (see \*(L"\s-1SUPPORTED OBJECTS\*(R"\s0 in \s-1OSSL_STORE_INFO\s0\|(3)) except for \s-1OSSL_STORE_INFO_NAME\s0. For example, if \*(C`file:/foo/bar/store.pem\*(C' contains several objects of different type and only certificates are interesting, the application can simply say that it expects the type \s-1OSSL_STORE_INFO_CERT\s0.

\fBOSSL_STORE_find() helps applications specify a criterion for a more fine grained search of objects.

\fBOSSL_STORE_supports_search() checks if the loader of the given \s-1OSSL_STORE\s0 context supports the given search type. See \*(L"\s-1SUPPORTED CRITERION TYPES\*(R"\s0 in \s-1OSSL_STORE_SEARCH\s0\|(3) for information on the supported search criterion types.

\fBOSSL_STORE_expect() and OSSL_STORE_find must be called before the first \fBOSSL_STORE_load() of a given session, or they will fail.

Header "NOTES" If 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.

Header "RETURN VALUES" \fBOSSL_STORE_expect() returns 1 on success, or 0 on failure.

\fBOSSL_STORE_supports_search() returns 1 if the criterion is supported, or 0 otherwise.

\fBOSSL_STORE_find() returns 1 on success, or 0 on failure.

Header "SEE ALSO" \fBossl_store\|(7), \s-1OSSL_STORE_INFO\s0\|(3), \s-1OSSL_STORE_SEARCH\s0\|(3), \fBOSSL_STORE_load\|(3) Header "HISTORY" \fBOSSL_STORE_expect(), OSSL_STORE_supports_search() and OSSL_STORE_find() were added in OpenSSL 1.1.1. Header "COPYRIGHT" Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.