DSA_SIZE(3) Library Functions Manual DSA_SIZE(3)
NAME
DSA_size, DSA_bits — get DSA signature or key size
SYNOPSIS
#include <openssl/dsa.h>
int
DSA_size(const DSA *dsa);
int
DSA_bits(const DSA *dsa);
DESCRIPTION
DSA_size() returns the maximum size of an ASN.1 encoded DSA signature for the 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 significant bits in the public domain parameter p contained in dsa. This is also the number of bits in the public key.
RETURN VALUES
DSA_size() returns the size of the signature in bytes.
DSA_bits() returns the size of the public key in bits.
SEE ALSO
DSA_get0_pqg(3), DSA_new(3), DSA_security_bits(3), DSA_sign(3)
HISTORY
DSA_size() first appeared in SSLeay 0.6.0 and has been available since OpenBSD 2.4.
DSA_bits() first appeared in OpenSSL 1.1.0 and has been available since OpenBSD 7.1. GNU July 13, 2022 DSA_SIZE(3)