EVP_PKEY_get1_DSA
dtmp = EVP_PKEY_get1_DSA(key);
key = EVP_PKEY_get1_DSA(pkey);
struct dsa_st *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
if (!TEST_ptr(dsa = EVP_PKEY_get1_DSA(pkey))