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libhsmd: Migrate handle_channel_update_sig

This commit is contained in:
Christian Decker 2021-04-21 20:56:33 +02:00 committed by Rusty Russell
parent 166f0ade04
commit eab4aeaed3
2 changed files with 53 additions and 55 deletions
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55
hsmd/hsmd.c
View File

@ -763,57 +763,6 @@ static struct io_plan *init_hsm(struct io_conn *conn,
&bolt12)));
}
/*~ The specific routine to sign the channel_update message. */
static struct io_plan *handle_channel_update_sig(struct io_conn *conn,
struct client *c,
const u8 *msg_in)
{
/* BOLT #7:
*
* - MUST set `signature` to the signature of the double-SHA256 of the
* entire remaining packet after `signature`, using its own
* `node_id`.
*/
/* 2 bytes msg type + 64 bytes signature */
size_t offset = 66;
struct privkey node_pkey;
struct sha256_double hash;
secp256k1_ecdsa_signature sig;
struct short_channel_id scid;
u32 timestamp, fee_base_msat, fee_proportional_mill;
struct amount_msat htlc_minimum, htlc_maximum;
u8 message_flags, channel_flags;
u16 cltv_expiry_delta;
struct bitcoin_blkid chain_hash;
u8 *cu;
if (!fromwire_hsmd_cupdate_sig_req(tmpctx, msg_in, &cu))
return bad_req(conn, c, msg_in);
if (!fromwire_channel_update_option_channel_htlc_max(cu, &sig,
&chain_hash, &scid, &timestamp, &message_flags,
&channel_flags, &cltv_expiry_delta,
&htlc_minimum, &fee_base_msat,
&fee_proportional_mill, &htlc_maximum)) {
return bad_req_fmt(conn, c, msg_in, "Bad inner channel_update");
}
if (tal_count(cu) < offset)
return bad_req_fmt(conn, c, msg_in,
"inner channel_update too short");
node_key(&node_pkey, NULL);
sha256_double(&hash, cu + offset, tal_count(cu) - offset);
sign_hash(&node_pkey, &hash, &sig);
cu = towire_channel_update_option_channel_htlc_max(tmpctx, &sig, &chain_hash,
&scid, timestamp, message_flags, channel_flags,
cltv_expiry_delta, htlc_minimum,
fee_base_msat, fee_proportional_mill,
htlc_maximum);
return req_reply(conn, c, take(towire_hsmd_cupdate_sig_reply(NULL, cu)));
}
/*~ This is another lightningd-only interface; signing a commit transaction.
* This is dangerous, since if we sign a revoked commitment tx we'll lose
* funds, thus it's only available to lightningd.
@ -1581,9 +1530,6 @@ static struct io_plan *handle_client(struct io_conn *conn, struct client *c)
case WIRE_HSMD_CLIENT_HSMFD:
return pass_client_hsmfd(conn, c, c->msg_in);
case WIRE_HSMD_CUPDATE_SIG_REQ:
return handle_channel_update_sig(conn, c, c->msg_in);
case WIRE_HSMD_SIGN_WITHDRAWAL:
return handle_sign_withdrawal_tx(conn, c, c->msg_in);
@ -1623,6 +1569,7 @@ static struct io_plan *handle_client(struct io_conn *conn, struct client *c)
case WIRE_HSMD_GET_OUTPUT_SCRIPTPUBKEY:
case WIRE_HSMD_CANNOUNCEMENT_SIG_REQ:
case WIRE_HSMD_NODE_ANNOUNCEMENT_SIG_REQ:
case WIRE_HSMD_CUPDATE_SIG_REQ:
/* Hand off to libhsmd for processing */
return req_reply(conn, c,
take(hsmd_handle_client_message(

53
hsmd/libhsmd.c
View File

@ -671,6 +671,56 @@ static u8 *handle_sign_node_announcement(struct hsmd_client *c,
return reply;
}
/*~ The specific routine to sign the channel_update message. */
static u8 *handle_channel_update_sig(struct hsmd_client *c, const u8 *msg_in)
{
/* BOLT #7:
*
* - MUST set `signature` to the signature of the double-SHA256 of the
* entire remaining packet after `signature`, using its own
* `node_id`.
*/
/* 2 bytes msg type + 64 bytes signature */
size_t offset = 66;
struct privkey node_pkey;
struct sha256_double hash;
secp256k1_ecdsa_signature sig;
struct short_channel_id scid;
u32 timestamp, fee_base_msat, fee_proportional_mill;
struct amount_msat htlc_minimum, htlc_maximum;
u8 message_flags, channel_flags;
u16 cltv_expiry_delta;
struct bitcoin_blkid chain_hash;
u8 *cu;
if (!fromwire_hsmd_cupdate_sig_req(tmpctx, msg_in, &cu))
return hsmd_status_malformed_request(c, msg_in);
if (!fromwire_channel_update_option_channel_htlc_max(cu, &sig,
&chain_hash, &scid, &timestamp, &message_flags,
&channel_flags, &cltv_expiry_delta,
&htlc_minimum, &fee_base_msat,
&fee_proportional_mill, &htlc_maximum)) {
return hsmd_status_bad_request(c, msg_in,
"Bad inner channel_update");
}
if (tal_count(cu) < offset)
return hsmd_status_bad_request(
c, msg_in, "inner channel_update too short");
node_key(&node_pkey, NULL);
sha256_double(&hash, cu + offset, tal_count(cu) - offset);
sign_hash(&node_pkey, &hash, &sig);
cu = towire_channel_update_option_channel_htlc_max(tmpctx, &sig, &chain_hash,
&scid, timestamp, message_flags, channel_flags,
cltv_expiry_delta, htlc_minimum,
fee_base_msat, fee_proportional_mill,
htlc_maximum);
return towire_hsmd_cupdate_sig_reply(NULL, cu);
}
u8 *hsmd_handle_client_message(const tal_t *ctx, struct hsmd_client *client,
const u8 *msg)
{
@ -697,7 +747,6 @@ u8 *hsmd_handle_client_message(const tal_t *ctx, struct hsmd_client *client,
switch (t) {
case WIRE_HSMD_INIT:
case WIRE_HSMD_CLIENT_HSMFD:
case WIRE_HSMD_CUPDATE_SIG_REQ:
case WIRE_HSMD_SIGN_WITHDRAWAL:
case WIRE_HSMD_SIGN_COMMITMENT_TX:
case WIRE_HSMD_SIGN_DELAYED_PAYMENT_TO_US:
@ -729,6 +778,8 @@ u8 *hsmd_handle_client_message(const tal_t *ctx, struct hsmd_client *client,
return handle_cannouncement_sig(client, msg);
case WIRE_HSMD_NODE_ANNOUNCEMENT_SIG_REQ:
return handle_sign_node_announcement(client, msg);
case WIRE_HSMD_CUPDATE_SIG_REQ:
return handle_channel_update_sig(client, msg);
case WIRE_HSMD_DEV_MEMLEAK:
case WIRE_HSMD_ECDH_RESP: