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DSA_SIZE(3) Library Functions Manual DSA_SIZE(3)

DSA_size, DSA_bitsget DSA signature or key size

#include <openssl/dsa.h>

DSA_size(const DSA *dsa);

DSA_bits(const DSA *dsa);

() 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.

() 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.

DSA_size() returns the size of the signature in bytes.

DSA_bits() returns the size of the public key in bits.

DSA_get0_pqg(3), DSA_new(3), DSA_security_bits(3), DSA_sign(3)

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.

July 13, 2022 OpenBSD-current