Updated: 2021/Apr/14

DSA_size(3)                         OpenSSL                        DSA_size(3)



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

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/dsa.h>

        int DSA_size(const DSA *dsa);
        int DSA_bits(const DSA *dsa);
        int DSA_security_bits(const DSA *dsa);

DESCRIPTION
       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).

RETURN VALUES
       DSA_size() returns the signature size in bytes.

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

SEE ALSO
       DSA_new(3), DSA_sign(3)

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>.



1.1.1i                            2018-09-23                       DSA_size(3)