rijndael_set_key
rijndael_set_key(&c->r_ctx, (u_char *)key,
void rijndael_set_key(rijndael_ctx *, u_char *, int, int);
rijndael_set_key(ctx, keydata, keylen_in_bytes * 8);
rijndael_set_key(&ctx->key1, keydata, (keylen_in_bytes / 2) * 8);
rijndael_set_key(&ctx->key2, keydata + (keylen_in_bytes / 2),
void rijndael_set_key(rijndael_ctx *, const u_char *, int);
rijndael_set_key(&ctx->cc_aes, k->wk_key, k->wk_keylen*NBBY);