Manpages - DSA_size.3ssl

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


#include <openssl/dsa.h> int DSA_size(const DSA *dsa); int DSA_bits(const DSA *dsa); int DSA_security_bits(const DSA *dsa);


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

dsa->q must not be NULL.

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

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


DSA_size() returns the signature size in bytes.

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


DSA_new (3), DSA_sign (3)


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

Author: dt

Created: 2022-02-20 Sun 14:34