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.

Linux 6.8.2-arch2-1              July 13, 2022             Linux 6.8.2-arch2-1