DSA_set_default_method, DSA_get_default_method, DSA_set_method, DSA_new_method,
DSA_OpenSSL - select DSA method
void DSA_set_default_method(const DSA_METHOD *meth);
const DSA_METHOD *DSA_get_default_method(void);
int DSA_set_method(DSA *dsa, const DSA_METHOD *meth);
DSA *DSA_new_method(ENGINE *engine);
specifies the functions that OpenSSL uses for DSA
operations. By modifying the method, alternative implementations such as
hardware accelerators may be used. IMPORTANT: See the NOTES section for
important information about how these DSA API functions are affected by the
use of ENGINE
Initially, the default DSA_METHOD is the OpenSSL internal implementation, as
returned by DSA_OpenSSL()
the default method for all DSA
structures created later. NB
: This is true only whilst no ENGINE has
been set as a default for DSA, so this function is no longer recommended.
returns a pointer to the current default
DSA_METHOD. However, the meaningfulness of this result is dependent on whether
the ENGINE API is being used, so this function is no longer recommended.
to perform all operations using the
. This will replace the DSA_METHOD used by the DSA key and if
the previous method was supplied by an ENGINE, the handle to that ENGINE will
be released during the change. It is possible to have DSA keys that only work
with certain DSA_METHOD implementations (eg. from an ENGINE module that
supports embedded hardware-protected keys), and in such cases attempting to
change the DSA_METHOD for the key can have unexpected results. See
DSA_meth_new for information on constructing custom DSA_METHOD objects;
allocates and initializes a DSA structure so that
will be used for the DSA operations. If engine
the default engine for DSA operations is used, and if no default ENGINE is
set, the DSA_METHOD controlled by DSA_set_default_method()
return pointers to the
returns no value.
returns non-zero if the provided meth
successfully set as the method for dsa
(including unloading the ENGINE
handle if the previous method was supplied by an ENGINE).
returns NULL and sets an error code that can be obtained
(3) if the allocation fails. Otherwise it returns a
pointer to the newly allocated structure.
Copyright 2000-2016 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