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DH_SIZE(3)                          OpenSSL                         DH_SIZE(3)
NAME
       DH_size, DH_bits, DH_security_bits - get Diffie-Hellman prime size and
       security bits
SYNOPSIS
        #include <openssl/dh.h>
        int DH_size(const DH *dh);
        int DH_bits(const DH *dh);
        int DH_security_bits(const DH *dh);
DESCRIPTION
       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(3).
       DH_bits() returns the number of significant bits.
       dh and dh->p must not be NULL.
       DH_security_bits() returns the number of security bits of the given dh
       key. See BN_security_bits(3).
RETURN VALUES
       DH_size() returns the prime size of Diffie-Hellman in bytes.
       DH_bits() returns the number of bits in the key.
       DH_security_bits() returns the number of security bits.
SEE ALSO
       DH_new(3), DH_generate_key(3), BN_num_bits(3)
HISTORY
       The DH_bits() function was added in OpenSSL 1.1.0.
COPYRIGHT
       Copyright 2000-2018 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
       <https://www.openssl.org/source/license.html>;.
1.1.1k                            2021-03-25                        DH_SIZE(3)