DSA_size.3ssl - Man Page

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).

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)

Referenced By

BN_num_bytes.3ssl(3), DSA_get0_pqg.3ssl(3), DSA_meth_new.3ssl(3).

The man pages DSA_bits.3ssl(3) and DSA_security_bits.3ssl(3) are aliases of DSA_size.3ssl(3).

2021-09-20 1.1.1l OpenSSL