load_keyparams
params = load_keyparams(infile, informat, 1, "DSA", "DSA parameters");
pkey = load_keyparams(dsaparams, FORMAT_UNDEF, 1, "DSA", "DSA parameters");
EVP_PKEY *load_keyparams(const char *uri, int format, int maybe_stdin,
dhpkey = load_keyparams(dhfile, FORMAT_UNDEF, 0, "DH", "DH parameters");