EVP_PKEY_set1_DSA
success = EVP_PKEY_set1_DSA(pkey, key->dsa);
ret = EVP_PKEY_set1_DSA(pk, (DSA *)x);
ret = EVP_PKEY_set1_DSA(pk, (DSA *)x);
if (EVP_PKEY_set1_DSA(pkey, key))
int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, struct dsa_st *key);
#define dsa_set1 (evp_pkey_set1_fn *)EVP_PKEY_set1_DSA
EVP_PKEY_set1_DSA(pkey, dsakey);