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101 lines
2.7 KiB
101 lines
2.7 KiB
#include "hsm_control.h"
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#include "lightningd.h"
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#include "peer_control.h"
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#include "subdaemon.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_control_wire.h>
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#include <lightningd/hsm/gen_hsm_status_wire.h>
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#include <wally_bip32.h>
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static void hsm_init_done(struct subdaemon *hsm, const u8 *msg,
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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_response(hsm, msg, NULL, &ld->dstate.id,
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&serialized_extkey))
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errx(1, "HSM did not give init response");
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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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}
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static void hsm_finished(struct subdaemon *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 enum subdaemon_status hsm_status(struct subdaemon *hsm, const u8 *msg,
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int fd)
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{
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enum hsm_status_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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break;
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}
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return STATUS_COMPLETE;
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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_subdaemon(ld, ld, "lightningd_hsm",
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hsm_status_wire_type_name,
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hsm_control_wire_type_name,
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hsm_status, hsm_finished, -1);
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if (!ld->hsm)
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err(1, "Could not subdaemon 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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if (create)
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subdaemon_req(ld->hsm, take(towire_hsmctl_init_new(ld->hsm)),
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-1, NULL, hsm_init_done, ld);
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else
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subdaemon_req(ld->hsm, take(towire_hsmctl_init_load(ld->hsm)),
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-1, NULL, 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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