ossl_dsa_new
DSA *dsa = ossl_dsa_new(pctx->libctx);
if ((dupkey = ossl_dsa_new(dsa->libctx)) == NULL)
DSA *ossl_dsa_new(OSSL_LIB_CTX *libctx);
return ossl_dsa_new(PROV_LIBCTX_OF(provctx));
dsa = ossl_dsa_new(gctx->libctx);