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

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       Licensed under the Apache License 2.0 (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>.

3.5.0                                              2025-06-04                                     DSA_SIZE(3SSL)

       All of the functions described on this page are deprecated.  Applications should instead use
       EVP_PKEY_get_bits(3), EVP_PKEY_get_security_bits(3) and EVP_PKEY_get_size(3).

       DSA_bits() returns the number of bits in key dsa: this is the number of bits in the p parameter.

       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_security_bits() returns the number of security bits of the given dsa key. See BN_security_bits(3).

       All of these functions were deprecated in OpenSSL 3.0.

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

DSA_security_bits() returns the number of security bits in the key, or -1 if dsa doesn't hold any key
       parameters.

       DSA_bits() returns the number of bits in the key, or -1 if dsa doesn't hold any key parameters.

       DSA_size() returns the signature size in bytes, or -1 if dsa doesn't hold any key parameters.

EVP_PKEY_get_bits(3), EVP_PKEY_get_security_bits(3), EVP_PKEY_get_size(3), DSA_new(3), DSA_sign(3)

        #include <openssl/dsa.h>

       The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining
       OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):

        int DSA_bits(const DSA *dsa);

        int DSA_size(const DSA *dsa);

        int DSA_security_bits(const DSA *dsa);