kn_decode_key
if (kn_decode_key(&dc, key, KEYNOTE_PUBLIC_KEY) != 0)
int kn_decode_key(struct keynote_deckey *, char *, int);
i = kn_decode_key(&dc, s, KEYNOTE_PRIVATE_KEY);
if (!buf2 || kn_decode_key(&dc, buf2,
if (kn_decode_key(&dc, dat, KEYNOTE_PUBLIC_KEY) != 0)