rijndael_set_key
int rijndael_set_key(rijndael_ctx *, const u_char *, int);
rijndael_set_key(&ctx->key1, key, len * 4);
rijndael_set_key(&ctx->key2, key + (len / 2), len * 4);
if (rijndael_set_key(&ctx, key, 256) != 0)
rijndael_set_key(&ctx->key1, key, len * 4);
rijndael_set_key(&ctx->key2, key + (len / 2), len * 4);
int rijndael_set_key(rijndael_ctx *, const u_char *, int);
if (rijndael_set_key(&ctx, kdfinfo->maskkey, 256) != 0)
rijndael_set_key(&swap_ctxt, (u_char *)key->key,