DH_SIZE - Online Linux Manual PageSection : 3ossl
Updated : 2022-03-15
Source : 3.0.2
Note : OpenSSL
NAMEDH_size, DH_bits, DH_security_bits − get Diffie−Hellman prime size and security bits
SYNOPSIS #include <openssl/dh.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): int DH_bits(const DH *dh);
int DH_size(const DH *dh);
int DH_security_bits(const DH *dh);
DESCRIPTIONThe functions described on this page are deprecated. Applications should instead use EVP_PKEY_get_bits (3), EVP_PKEY_get_security_bits (3) and EVP_PKEY_get_size (3). DH_bits() returns the number of significant bits. dh and dh−>p must not be NULL. 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_security_bits() returns the number of security bits of the given dh key. See BN_security_bits (3).
RETURN VALUESDH_bits() returns the number of bits in the key, or −1 if dh doesn't hold any key parameters. DH_size() returns the prime size of Diffie-Hellman in bytes, or −1 if dh doesn't hold any key parameters. DH_security_bits() returns the number of security bits, or −1 if dh doesn't hold any key parameters.
SEE ALSOEVP_PKEY_get_bits (3), DH_new (3), DH_generate_key (3), BN_num_bits (3)
HISTORYAll 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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