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channeld: add hsm_req() helper.

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We're going to be making more HSM requests as we move signing over to the HSM.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-07-23 11:53:03 +09:30 committed by Christian Decker
parent 89b1cc69ef
commit 909bda938b
1 changed files with 28 additions and 15 deletions
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43
channeld/channel.c
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@ -300,6 +300,27 @@ static void enqueue_peer_msg(struct peer *peer, const u8 *msg TAKES)
msg_enqueue(&peer->peer_out, msg);
}
static const u8 *hsm_req(const tal_t *ctx, const u8 *req TAKES)
{
u8 *msg;
int type = fromwire_peektype(req);
if (!wire_sync_write(HSM_FD, req))
status_failed(STATUS_FAIL_HSM_IO,
"Writing %s to HSM: %s",
hsm_client_wire_type_name(type),
strerror(errno));
msg = wire_sync_read(ctx, HSM_FD);
if (!msg)
status_failed(STATUS_FAIL_HSM_IO,
"Reading resp to %s: %s",
hsm_client_wire_type_name(type),
strerror(errno));
return msg;
}
/* Create and send channel_update to gossipd (and maybe peer) */
static void send_channel_update(struct peer *peer, int disable_flag)
{
@ -354,19 +375,14 @@ static void send_announcement_signatures(struct peer *peer)
/* First 2 + 256 byte are the signatures and msg type, skip them */
size_t offset = 258;
struct sha256_double hash;
u8 *msg, *ca, *req;
const u8 *msg, *ca, *req;
status_trace("Exchanging announcement signatures.");
ca = create_channel_announcement(tmpctx, peer);
req = towire_hsm_cannouncement_sig_req(tmpctx, ca);
if (!wire_sync_write(HSM_FD, req))
status_failed(STATUS_FAIL_HSM_IO,
"Writing cannouncement_sig_req: %s",
strerror(errno));
msg = wire_sync_read(tmpctx, HSM_FD);
if (!msg || !fromwire_hsm_cannouncement_sig_reply(msg,
msg = hsm_req(tmpctx, req);
if (!fromwire_hsm_cannouncement_sig_reply(msg,
&peer->announcement_node_sigs[LOCAL],
&peer->announcement_bitcoin_sigs[LOCAL]))
status_failed(STATUS_FAIL_HSM_IO,
@ -569,7 +585,7 @@ static bool get_shared_secret(const struct htlc *htlc,
{
struct pubkey ephemeral;
struct onionpacket *op;
u8 *msg;
const u8 *msg;
/* We unwrap the onion now. */
op = parse_onionpacket(tmpctx, htlc->routing, TOTAL_PACKET_SIZE);
@ -581,14 +597,11 @@ static bool get_shared_secret(const struct htlc *htlc,
/* Because wire takes struct pubkey. */
ephemeral.pubkey = op->ephemeralkey;
msg = towire_hsm_ecdh_req(tmpctx, &ephemeral);
if (!wire_sync_write(HSM_FD, msg))
status_failed(STATUS_FAIL_HSM_IO, "Writing ecdh req");
msg = wire_sync_read(tmpctx, HSM_FD);
/* Gives all-zero shares_secret if it was invalid. */
if (!msg || !fromwire_hsm_ecdh_resp(msg, shared_secret))
msg = hsm_req(tmpctx, towire_hsm_ecdh_req(tmpctx, &ephemeral));
if (!fromwire_hsm_ecdh_resp(msg, shared_secret))
status_failed(STATUS_FAIL_HSM_IO, "Reading ecdh response");
/* Gives all-zero shares_secret if it was invalid. */
return !memeqzero(shared_secret, sizeof(*shared_secret));
}