openssl/doc/man3/DSA_size.pod

=pod

=head1 NAME

DSA_size, DSA_bits, DSA_security_bits - get DSA signature size, key bits or security bits

=head1 SYNOPSIS

 #include <openssl/dsa.h>

 int DSA_bits(const DSA *dsa);

Deprecated since OpenSSL 3.0, can be hidden entirely by defining
B<OPENSSL_API_COMPAT> with a suitable version value, see
L<openssl_user_macros(7)>:

 int DSA_size(const DSA *dsa);

 int DSA_security_bits(const DSA *dsa);

=head1 DESCRIPTION

DSA_bits() returns the number of bits in key B<dsa>: this is the number
of bits in the B<p> parameter.

The remaining functions described on this page are deprecated.
Applications should instead use L<EVP_PKEY_security_bits(3)> and
L<EVP_PKEY_size(3)>.

DSA_size() returns the maximum size of an ASN.1 encoded DSA signature
for key B<dsa> in bytes. It can be used to determine how much memory must
be allocated for a DSA signature.

B<dsa-E<gt>q> must not be B<NULL>.

DSA_security_bits() returns the number of security bits of the given B<dsa>
key. See L<BN_security_bits(3)>.

=head1 RETURN VALUES

DSA_bits() returns the number of bits in the key.

DSA_size() returns the signature size in bytes.

=head1 SEE ALSO

L<EVP_PKEY_bits(3)>,
L<EVP_PKEY_security_bits(3)>,
L<EVP_PKEY_size(3)>,
L<DSA_new(3)>, L<DSA_sign(3)>

=head1 HISTORY

The DSA_size() and DSA_security_bits() functions were deprecated in OpenSSL 3.0.

=head1 COPYRIGHT

Copyright 2000-2020 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
L<https://www.openssl.org/source/license.html>.

=cut