mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-20 02:27:51 +01:00
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
#include <common/key_derive.h>
|
|
#include <common/keyset.h>
|
|
|
|
bool derive_keyset(const struct pubkey *per_commitment_point,
|
|
const struct pubkey *self_payment_basepoint,
|
|
const struct pubkey *other_payment_basepoint,
|
|
const struct pubkey *self_htlc_basepoint,
|
|
const struct pubkey *other_htlc_basepoint,
|
|
const struct pubkey *self_delayed_basepoint,
|
|
const struct pubkey *other_revocation_basepoint,
|
|
struct keyset *keyset)
|
|
{
|
|
/* BOLT #3:
|
|
*
|
|
* ### `localkey`, `remotekey`, `local_htlckey`, `remote_htlckey`,
|
|
* `local_delayedkey` and `remote_delayedkey` Derivation
|
|
*
|
|
* These keys are simply generated by addition from their base points:
|
|
*
|
|
* pubkey = basepoint + SHA256(per_commitment_point || basepoint)*G
|
|
*
|
|
* The `localkey` uses the local node's `payment_basepoint`,
|
|
* `remotekey` uses the remote node's `payment_basepoint`, the
|
|
* `local_delayedkey` uses the local node's
|
|
* `delayed_payment_basepoint`, the `local_htlckey` uses the local
|
|
* node's `htlc_basepoint` and the `remote_delayedkey` uses the
|
|
* remote node's `delayed_payment_basepoint`.
|
|
*/
|
|
if (!derive_simple_key(self_payment_basepoint,
|
|
per_commitment_point,
|
|
&keyset->self_payment_key))
|
|
return false;
|
|
|
|
if (!derive_simple_key(other_payment_basepoint,
|
|
per_commitment_point,
|
|
&keyset->other_payment_key))
|
|
return false;
|
|
|
|
if (!derive_simple_key(self_htlc_basepoint,
|
|
per_commitment_point,
|
|
&keyset->self_htlc_key))
|
|
return false;
|
|
|
|
if (!derive_simple_key(other_htlc_basepoint,
|
|
per_commitment_point,
|
|
&keyset->other_htlc_key))
|
|
return false;
|
|
|
|
if (!derive_simple_key(self_delayed_basepoint,
|
|
per_commitment_point,
|
|
&keyset->self_delayed_payment_key))
|
|
return false;
|
|
|
|
/* BOLT #3:
|
|
*
|
|
* ### `revocationkey` Derivation
|
|
*
|
|
* The `revocationkey` is a blinded key: when a node wishes to create
|
|
* a new commitment for a remote node, it uses its own
|
|
* `revocation_basepoint` and the remote node's `per_commitment_point`
|
|
* to derive a new `revocationkey` for the commitment.
|
|
*/
|
|
if (!derive_revocation_key(other_revocation_basepoint,
|
|
per_commitment_point,
|
|
&keyset->self_revocation_key))
|
|
return false;
|
|
|
|
return true;
|
|
}
|