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3dbf824380
There was recently an instance where a user was confused by the deprecation warnings in the docs. They believed the warning applied to the immediately preceding function declarations, when it fact it applied to the following function declarations. https://mta.openssl.org/pipermail/openssl-users/2021-December/014665.html We clarify the wording to make it clear that the warning applies to the following functions. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/17180)
100 lines
3.5 KiB
Plaintext
100 lines
3.5 KiB
Plaintext
=pod
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=head1 NAME
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DSA_set_default_method, DSA_get_default_method,
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DSA_set_method, DSA_new_method, DSA_OpenSSL - select DSA method
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=head1 SYNOPSIS
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#include <openssl/dsa.h>
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The following functions have been deprecated since OpenSSL 3.0, and can be
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hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
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see L<openssl_user_macros(7)>:
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void DSA_set_default_method(const DSA_METHOD *meth);
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const DSA_METHOD *DSA_get_default_method(void);
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int DSA_set_method(DSA *dsa, const DSA_METHOD *meth);
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DSA *DSA_new_method(ENGINE *engine);
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const DSA_METHOD *DSA_OpenSSL(void);
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=head1 DESCRIPTION
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All of the functions described on this page are deprecated.
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Applications should providers instead of method overrides.
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A B<DSA_METHOD> specifies the functions that OpenSSL uses for DSA
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operations. By modifying the method, alternative implementations
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such as hardware accelerators may be used. IMPORTANT: See the NOTES section for
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important information about how these DSA API functions are affected by the use
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of B<ENGINE> API calls.
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Initially, the default DSA_METHOD is the OpenSSL internal implementation,
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as returned by DSA_OpenSSL().
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DSA_set_default_method() makes B<meth> the default method for all DSA
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structures created later.
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B<NB>: This is true only whilst no ENGINE has
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been set as a default for DSA, so this function is no longer recommended.
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This function is not thread-safe and should not be called at the same time
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as other OpenSSL functions.
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DSA_get_default_method() returns a pointer to the current default
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DSA_METHOD. However, the meaningfulness of this result is dependent on
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whether the ENGINE API is being used, so this function is no longer
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recommended.
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DSA_set_method() selects B<meth> to perform all operations using the key
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B<rsa>. This will replace the DSA_METHOD used by the DSA key and if the
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previous method was supplied by an ENGINE, the handle to that ENGINE will
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be released during the change. It is possible to have DSA keys that only
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work with certain DSA_METHOD implementations (e.g. from an ENGINE module
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that supports embedded hardware-protected keys), and in such cases
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attempting to change the DSA_METHOD for the key can have unexpected
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results. See L<DSA_meth_new(3)> for information on constructing custom DSA_METHOD
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objects;
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DSA_new_method() allocates and initializes a DSA structure so that B<engine>
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will be used for the DSA operations. If B<engine> is NULL, the default engine
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for DSA operations is used, and if no default ENGINE is set, the DSA_METHOD
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controlled by DSA_set_default_method() is used.
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=head1 RETURN VALUES
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DSA_OpenSSL() and DSA_get_default_method() return pointers to the respective
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B<DSA_METHOD>s.
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DSA_set_default_method() returns no value.
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DSA_set_method() returns nonzero if the provided B<meth> was successfully set as
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the method for B<dsa> (including unloading the ENGINE handle if the previous
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method was supplied by an ENGINE).
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DSA_new_method() returns NULL and sets an error code that can be
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obtained by L<ERR_get_error(3)> if the allocation
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fails. Otherwise it returns a pointer to the newly allocated structure.
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=head1 SEE ALSO
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L<DSA_new(3)>, L<DSA_new(3)>, L<DSA_meth_new(3)>
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=head1 HISTORY
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All of these functions were deprecated in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
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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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