select_keytype_and_size
if (!select_keytype_and_size(buf, len, &keytype, &keylen, 0))
if (!select_keytype_and_size(buf, len, &keytype, &keylen, 1))
if (!select_keytype_and_size(buf, len, &keytype, &keylen, 0))
if (!select_keytype_and_size(buf, len, &keytype, &keylen, 1))