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https://github.com/ElementsProject/lightning.git
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fc98d797d2
Instead of reusing HSMFD_ECDH, we have an explicit channeld hsm fd, which can do ECDH and will soon do channel announce signatures as well. Based-on: Christian Decker <decker.christian@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
#include "hsm_control.h"
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#include "lightningd.h"
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#include "peer_control.h"
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#include "subd.h"
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#include <ccan/err/err.h>
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#include <ccan/io/io.h>
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#include <ccan/take/take.h>
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#include <daemon/log.h>
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#include <inttypes.h>
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#include <lightningd/hsm/gen_hsm_wire.h>
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#include <wally_bip32.h>
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static bool hsm_init_done(struct subd *hsm, const u8 *msg, const int *fds,
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struct lightningd *ld)
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{
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u8 *serialized_extkey;
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if (!fromwire_hsmctl_init_reply(hsm, msg, NULL, &ld->dstate.id,
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&ld->peer_seed,
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&serialized_extkey))
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errx(1, "HSM did not give init reply");
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log_info_struct(ld->log, "Our ID: %s", struct pubkey, &ld->dstate.id);
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ld->bip32_base = tal(ld, struct ext_key);
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if (bip32_key_unserialize(serialized_extkey, tal_len(serialized_extkey),
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ld->bip32_base) != WALLY_OK)
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errx(1, "HSM did not give unserializable BIP32 extkey");
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io_break(ld->hsm);
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return true;
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}
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static void hsm_finished(struct subd *hsm, int status)
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{
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if (WIFEXITED(status))
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errx(1, "HSM failed (exit status %i), exiting.",
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WEXITSTATUS(status));
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errx(1, "HSM failed (signal %u), exiting.", WTERMSIG(status));
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}
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static int hsm_msg(struct subd *hsm, const u8 *msg, const int *fds)
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{
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enum hsm_wire_type t = fromwire_peektype(msg);
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u8 *badmsg;
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struct peer *peer;
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u64 id;
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switch (t) {
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case WIRE_HSMSTATUS_CLIENT_BAD_REQUEST:
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if (!fromwire_hsmstatus_client_bad_request(msg, msg, NULL,
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&id, &badmsg))
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errx(1, "HSM bad status %s", tal_hex(msg, msg));
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peer = peer_by_unique_id(hsm->ld, id);
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/* "Shouldn't happen" */
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errx(1, "HSM says bad cmd from %"PRIu64" (%s): %s",
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id,
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peer ? (peer->id ? type_to_string(msg, struct pubkey,
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peer->id)
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: "pubkey not yet known")
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: "unknown peer",
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tal_hex(msg, badmsg));
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/* We don't get called for failed status. */
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case WIRE_HSMSTATUS_INIT_FAILED:
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case WIRE_HSMSTATUS_WRITEMSG_FAILED:
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case WIRE_HSMSTATUS_BAD_REQUEST:
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case WIRE_HSMSTATUS_FD_FAILED:
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case WIRE_HSMSTATUS_KEY_FAILED:
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/* HSM doesn't send these */
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case WIRE_HSMCTL_INIT:
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case WIRE_HSMCTL_HSMFD_ECDH:
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case WIRE_HSMCTL_HSMFD_CHANNELD:
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case WIRE_HSMCTL_SIGN_FUNDING:
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/* Replies should be paired to individual requests. */
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case WIRE_HSMCTL_INIT_REPLY:
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case WIRE_HSMCTL_HSMFD_CHANNELD_REPLY:
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case WIRE_HSMCTL_HSMFD_ECDH_FD_REPLY:
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case WIRE_HSMCTL_SIGN_FUNDING_REPLY:
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errx(1, "HSM gave invalid message %s", hsm_wire_type_name(t));
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}
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return 0;
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}
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void hsm_init(struct lightningd *ld, bool newdir)
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{
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bool create;
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ld->hsm = new_subd(ld, ld, "lightningd_hsm", NULL,
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hsm_wire_type_name,
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hsm_msg, hsm_finished, -1);
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if (!ld->hsm)
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err(1, "Could not subd hsm");
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if (newdir)
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create = true;
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else
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create = (access("hsm_secret", F_OK) != 0);
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subd_req(ld->hsm, ld->hsm, take(towire_hsmctl_init(ld->hsm, create)),
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-1, 0, hsm_init_done, ld);
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if (io_loop(NULL, NULL) != ld->hsm)
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errx(1, "Unexpected io exit during HSM startup");
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}
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