DSA_SET_METHOD - Online Linux Manual PageSection : 3ossl
Updated : 2022-03-15
Source : 3.0.2
Note : OpenSSL
NAMEDSA_set_default_method, DSA_get_default_method, DSA_set_method, DSA_new_method, DSA_OpenSSL − select DSA method
SYNOPSIS​ #include <openssl/dsa.h> The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros (7): ​ 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); ​ ​ const DSA_METHOD *DSA_OpenSSL(void);
DESCRIPTIONAll of the functions described on this page are deprecated. Applications should providers instead of method overrides. A DSA_METHOD 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 API calls. Initially, the default DSA_METHOD is the OpenSSL internal implementation, as returned by DSA_OpenSSL(). ​DSA_set_default_method() makes meth 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. This function is not thread-safe and should not be called at the same time as other OpenSSL functions. ​DSA_get_default_method() 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. ​DSA_set_method() selects meth to perform all operations using the key ​rsa. 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 (e.g. 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 (3) for information on constructing custom DSA_METHOD objects; ​DSA_new_method() allocates and initializes a DSA structure so that engine will be used for the DSA operations. If engine is NULL, the default engine for DSA operations is used, and if no default ENGINE is set, the DSA_METHOD controlled by DSA_set_default_method() is used.
RETURN VALUES​DSA_OpenSSL() and DSA_get_default_method() return pointers to the respective ​DSA_METHODs. ​DSA_set_default_method() returns no value. ​DSA_set_method() returns nonzero if the provided meth was successfully set as the method for dsa (including unloading the ENGINE handle if the previous method was supplied by an ENGINE). ​DSA_new_method() returns NULL and sets an error code that can be obtained by ERR_get_error (3) if the allocation fails. Otherwise it returns a pointer to the newly allocated structure.
SEE ALSO​DSA_new (3), DSA_new (3), DSA_meth_new (3)
HISTORYAll of these functions were deprecated in OpenSSL 3.0.
COPYRIGHTCopyright 2000−2021 The OpenSSL Project Authors. All Rights Reserved. Licensed under the Apache License 2.0 (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 <https://www.openssl.org/source/license.html>. 0
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