CRYPTO_EX_INDEX_DSA
if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_DSA,
if (!ossl_crypto_new_ex_data_ex(libctx, CRYPTO_EX_INDEX_DSA, ret,
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, l, p, newf, dupf, freef)