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#	README.md
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Zhi Guan
2017-02-14 16:12:29 +08:00
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doc/crypto/DH_size.pod
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=head1 NAME
DH_size - get Diffie-Hellman prime size
DH_size, DH_bits - get Diffie-Hellman prime size
=head1 SYNOPSIS
#include <openssl/dh.h>
#include <openssl/dh.h>
int DH_size(DH *dh);
int DH_size(const DH *dh);
int DH_bits(const DH *dh);
=head1 DESCRIPTION
This function returns the Diffie-Hellman size in bytes. It can be used
DH_size() returns the Diffie-Hellman prime size in bytes. It can be used
to determine how much memory must be allocated for the shared secret
computed by DH_compute_key().
B<dh-E<gt>p> must not be B<NULL>.
DH_bits() returns the number of significant bits.
B<dh> and B<dh-E<gt>p> must not be B<NULL>.
=head1 RETURN VALUE
The size in bytes.
The size.
=head1 SEE ALSO
L<dh(3)|dh(3)>, L<DH_generate_key(3)|DH_generate_key(3)>
L<dh(3)>, L<DH_generate_key(3)>,
L<BN_num_bits(3)>
=head1 HISTORY
DH_size() is available in all versions of SSLeay and OpenSSL.
DH_bits() was added in OpenSSL 1.1.0.
=head1 COPYRIGHT
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
L<https://www.openssl.org/source/license.html>.
=cut