2017-07-06 01:17:40 +08:00
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=pod
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=head1 NAME
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OSSL_STORE_SEARCH,
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OSSL_STORE_SEARCH_by_name,
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OSSL_STORE_SEARCH_by_issuer_serial,
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OSSL_STORE_SEARCH_by_key_fingerprint,
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OSSL_STORE_SEARCH_by_alias,
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OSSL_STORE_SEARCH_free,
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OSSL_STORE_SEARCH_get_type,
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OSSL_STORE_SEARCH_get0_name,
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OSSL_STORE_SEARCH_get0_serial,
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OSSL_STORE_SEARCH_get0_bytes,
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OSSL_STORE_SEARCH_get0_string,
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OSSL_STORE_SEARCH_get0_digest
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- Type and functions to create OSSL_STORE search criteria
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=head1 SYNOPSIS
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#include <openssl/store.h>
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typedef struct ossl_store_search_st OSSL_STORE_SEARCH;
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OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_name(X509_NAME *name);
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OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_issuer_serial(X509_NAME *name,
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const ASN1_INTEGER
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*serial);
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OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_key_fingerprint(const EVP_MD *digest,
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const unsigned char
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*bytes, int len);
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OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_alias(const char *alias);
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void OSSL_STORE_SEARCH_free(OSSL_STORE_SEARCH *search);
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int OSSL_STORE_SEARCH_get_type(const OSSL_STORE_SEARCH *criterion);
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X509_NAME *OSSL_STORE_SEARCH_get0_name(OSSL_STORE_SEARCH *criterion);
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const ASN1_INTEGER *OSSL_STORE_SEARCH_get0_serial(const OSSL_STORE_SEARCH
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*criterion);
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const unsigned char *OSSL_STORE_SEARCH_get0_bytes(const OSSL_STORE_SEARCH
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*criterion, size_t *length);
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const char *OSSL_STORE_SEARCH_get0_string(const OSSL_STORE_SEARCH *criterion);
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const EVP_MD *OSSL_STORE_SEARCH_get0_digest(const OSSL_STORE_SEARCH
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*criterion);
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=head1 DESCRIPTION
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2018-03-11 02:13:23 +08:00
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These functions are used to specify search criteria to help search for specific
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objects through other names than just the URI that's given to OSSL_STORE_open().
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For example, this can be useful for an application that has received a URI
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and then wants to add on search criteria in a uniform and supported manner.
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=head2 Types
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B<OSSL_STORE_SEARCH> is an opaque type that holds the constructed search
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criterion, and that can be given to an OSSL_STORE context with
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OSSL_STORE_find().
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The calling application owns the allocation of an B<OSSL_STORE_SEARCH> at all
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times, and should therefore be careful not to deallocate it before
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OSSL_STORE_close() has been called for the OSSL_STORE context it was given
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to.
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=head2 Application Functions
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OSSL_STORE_SEARCH_by_name(),
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OSSL_STORE_SEARCH_by_issuer_serial(),
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OSSL_STORE_SEARCH_by_key_fingerprint(),
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and OSSL_STORE_SEARCH_by_alias()
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are used to create an B<OSSL_STORE_SEARCH> from a subject name, an issuer name
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and serial number pair, a key fingerprint, and an alias (for example a friendly
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name).
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The parameters that are provided are not copied, only referred to in a
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criterion, so they must have at least the same life time as the created
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B<OSSL_STORE_SEARCH>.
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OSSL_STORE_SEARCH_free() is used to free the B<OSSL_STORE_SEARCH>.
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=head2 Loader Functions
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OSSL_STORE_SEARCH_get_type() returns the criterion type for the given
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B<OSSL_STORE_SEARCH>.
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OSSL_STORE_SEARCH_get0_name(), OSSL_STORE_SEARCH_get0_serial(),
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OSSL_STORE_SEARCH_get0_bytes(), OSSL_STORE_SEARCH_get0_string(),
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and OSSL_STORE_SEARCH_get0_digest()
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are used to retrieve different data from a B<OSSL_STORE_SEARCH>, as
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available for each type.
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For more information, see L</SUPPORTED CRITERION TYPES> below.
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=head1 SUPPORTED CRITERION TYPES
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Currently supported criterion types are:
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=over 4
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=item OSSL_STORE_SEARCH_BY_NAME
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This criterion supports a search by exact match of subject name.
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The subject name itself is a B<X509_NAME> pointer.
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A criterion of this type is created with OSSL_STORE_SEARCH_by_name(),
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and the actual subject name is retrieved with OSSL_STORE_SEARCH_get0_name().
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=item OSSL_STORE_SEARCH_BY_ISSUER_SERIAL
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This criterion supports a search by exact match of both issuer name and serial
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number.
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The issuer name itself is a B<X509_NAME> pointer, and the serial number is
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a B<ASN1_INTEGER> pointer.
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A criterion of this type is created with OSSL_STORE_SEARCH_by_issuer_serial()
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and the actual issuer name and serial number are retrieved with
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OSSL_STORE_SEARCH_get0_name() and OSSL_STORE_SEARCH_get0_serial().
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=item OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT
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This criterion supports a search by exact match of key fingerprint.
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The key fingerprint in itself is a string of bytes and its length, as
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well as the algorithm that was used to compute the fingerprint.
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The digest may be left unspecified (NULL), and in that case, the
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loader has to decide on a default digest and compare fingerprints
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accordingly.
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A criterion of this type is created with OSSL_STORE_SEARCH_by_key_fingerprint()
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and the actual fingerprint and its length can be retrieved with
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OSSL_STORE_SEARCH_get0_bytes().
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The digest can be retrieved with OSSL_STORE_SEARCH_get0_digest().
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=item OSSL_STORE_SEARCH_BY_ALIAS
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This criterion supports a search by match of an alias of some kind.
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The alias in itself is a simple C string.
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A criterion of this type is created with OSSL_STORE_SEARCH_by_alias()
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and the actual alias is retrieved with OSSL_STORE_SEARCH_get0_string().
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=back
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=head1 RETURN VALUES
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OSSL_STORE_SEARCH_by_name(),
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OSSL_STORE_SEARCH_by_issuer_serial(),
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OSSL_STORE_SEARCH_by_key_fingerprint(),
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and OSSL_STORE_SEARCH_by_alias()
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return a B<OSSL_STORE_SEARCH> pointer on success, or NULL on failure.
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OSSL_STORE_SEARCH_get_type() returns the criterion type of the given
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B<OSSL_STORE_SEARCH>.
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There is no error value.
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OSSL_STORE_SEARCH_get0_name() returns a B<X509_NAME> pointer on success,
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or NULL when the given B<OSSL_STORE_SEARCH> was of a different type.
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OSSL_STORE_SEARCH_get0_serial() returns a B<ASN1_INTEGER> pointer on success,
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or NULL when the given B<OSSL_STORE_SEARCH> was of a different type.
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OSSL_STORE_SEARCH_get0_bytes() returns a B<const unsigned char> pointer and
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sets I<*length> to the strings length on success, or NULL when the given
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B<OSSL_STORE_SEARCH> was of a different type.
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OSSL_STORE_SEARCH_get0_string() returns a B<const char> pointer on success,
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or NULL when the given B<OSSL_STORE_SEARCH> was of a different type.
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OSSL_STORE_SEARCH_get0_digest() returns a B<const EVP_MD> pointer.
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NULL is a valid value and means that the store loader default will
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be used when applicable.
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=head1 SEE ALSO
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L<ossl_store(7)>, L<OSSL_STORE_supports_search(3)>, L<OSSL_STORE_find(3)>
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=head1 HISTORY
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B<OSSL_STORE_SEARCH>,
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OSSL_STORE_SEARCH_by_name(),
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OSSL_STORE_SEARCH_by_issuer_serial(),
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OSSL_STORE_SEARCH_by_key_fingerprint(),
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OSSL_STORE_SEARCH_by_alias(),
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OSSL_STORE_SEARCH_free(),
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OSSL_STORE_SEARCH_get_type(),
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OSSL_STORE_SEARCH_get0_name(),
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OSSL_STORE_SEARCH_get0_serial(),
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OSSL_STORE_SEARCH_get0_bytes(),
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and OSSL_STORE_SEARCH_get0_string()
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were added in OpenSSL 1.1.1.
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=head1 COPYRIGHT
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2020-10-15 21:10:06 +08:00
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Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved.
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2018-12-06 21:04:44 +08:00
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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