e90fc053c3
Reviewed-by: Paul Dale <paul.dale@oracle.com> (Merged from https://github.com/openssl/openssl/pull/3938)
102 lines
4.2 KiB
Text
102 lines
4.2 KiB
Text
=pod
|
|
|
|
=head1 NAME
|
|
|
|
DSA_get0_pqg, DSA_set0_pqg, DSA_get0_key, DSA_set0_key, DSA_clear_flags,
|
|
DSA_test_flags, DSA_set_flags, DSA_get0_engine - Routines for getting and
|
|
setting data in a DSA object
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/dsa.h>
|
|
|
|
void DSA_get0_pqg(const DSA *d,
|
|
const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
|
|
int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
|
|
void DSA_get0_key(const DSA *d,
|
|
const BIGNUM **pub_key, const BIGNUM **priv_key);
|
|
int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key);
|
|
void DSA_clear_flags(DSA *d, int flags);
|
|
int DSA_test_flags(const DSA *d, int flags);
|
|
void DSA_set_flags(DSA *d, int flags);
|
|
ENGINE *DSA_get0_engine(DSA *d);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
A DSA object contains the parameters B<p>, B<q> and B<g>. It also contains a
|
|
public key (B<pub_key>) and (optionally) a private key (B<priv_key>).
|
|
|
|
The B<p>, B<q> and B<g> parameters can be obtained by calling DSA_get0_pqg().
|
|
If the parameters have not yet been set then B<*p>, B<*q> and B<*g> will be set
|
|
to NULL. Otherwise they are set to pointers to their respective values. These
|
|
point directly to the internal representations of the values and therefore
|
|
should not be freed directly.
|
|
|
|
The B<p>, B<q> and B<g> values can be set by calling DSA_set0_pqg() and passing
|
|
the new values for B<p>, B<q> and B<g> as parameters to the function. Calling
|
|
this function transfers the memory management of the values to the DSA object,
|
|
and therefore the values that have been passed in should not be freed directly
|
|
after this function has been called.
|
|
|
|
To get the public and private key values use the DSA_get0_key() function. A
|
|
pointer to the public key will be stored in B<*pub_key>, and a pointer to the
|
|
private key will be stored in B<*priv_key>. Either may be NULL if they have not
|
|
been set yet, although if the private key has been set then the public key must
|
|
be. The values point to the internal representation of the public key and
|
|
private key values. This memory should not be freed directly.
|
|
|
|
The public and private key values can be set using DSA_set0_key(). The public
|
|
key must be non-NULL the first time this function is called on a given DSA
|
|
object. The private key may be NULL. On subsequent calls, either may be NULL,
|
|
which means the corresponding DSA field is left untouched. As for DSA_set0_pqg()
|
|
this function transfers the memory management of the key values to the DSA
|
|
object, and therefore they should not be freed directly after this function has
|
|
been called.
|
|
|
|
DSA_set_flags() sets the flags in the B<flags> parameter on the DSA object.
|
|
Multiple flags can be passed in one go (bitwise ORed together). Any flags that
|
|
are already set are left set. DSA_test_flags() tests to see whether the flags
|
|
passed in the B<flags> parameter are currently set in the DSA object. Multiple
|
|
flags can be tested in one go. All flags that are currently set are returned, or
|
|
zero if none of the flags are set. DSA_clear_flags() clears the specified flags
|
|
within the DSA object.
|
|
|
|
DSA_get0_engine() returns a handle to the ENGINE that has been set for this DSA
|
|
object, or NULL if no such ENGINE has been set.
|
|
|
|
=head1 NOTES
|
|
|
|
Values retrieved with DSA_get0_key() are owned by the DSA object used
|
|
in the call and may therefore I<not> be passed to DSA_set0_key(). If
|
|
needed, duplicate the received value using BN_dup() and pass the
|
|
duplicate. The same applies to DSA_get0_pqg() and DSA_set0_pqg().
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
DSA_set0_pqg() and DSA_set0_key() return 1 on success or 0 on failure.
|
|
|
|
DSA_test_flags() returns the current state of the flags in the DSA object.
|
|
|
|
DSA_get0_engine() returns the ENGINE set for the DSA object or NULL if no ENGINE
|
|
has been set.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<DSA_new(3)>, L<DSA_new(3)>, L<DSA_generate_parameters(3)>, L<DSA_generate_key(3)>,
|
|
L<DSA_dup_DH(3)>, L<DSA_do_sign(3)>, L<DSA_set_method(3)>, L<DSA_SIG_new(3)>,
|
|
L<DSA_sign(3)>, L<DSA_size(3)>, L<DSA_meth_new(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
The functions described here were added in OpenSSL 1.1.0.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|