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#include "hsm_control.h"
#include "lightningd.h"
#include "subd.h"
#include <ccan/err/err.h>
#include <ccan/fdpass/fdpass.h>
#include <ccan/io/io.h>
#include <ccan/take/take.h>
#include <common/status.h>
#include <common/utils.h>
#include <errno.h>
#include <hsmd/gen_hsm_wire.h>
#include <inttypes.h>
#include <lightningd/bitcoind.h>
#include <lightningd/hsm_control.h>
#include <lightningd/log.h>
#include <lightningd/log_status.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <wally_bip32.h>
#include <wire/wire_sync.h>
static int hsm_get_fd(struct lightningd *ld,
const struct node_id *id,
u64 dbid,
int capabilities)
{
int hsm_fd;
u8 *msg;
msg = towire_hsm_client_hsmfd(NULL, id, dbid, capabilities);
if (!wire_sync_write(ld->hsm_fd, take(msg)))
fatal("Could not write to HSM: %s", strerror(errno));
msg = wire_sync_read(tmpctx, ld->hsm_fd);
if (!fromwire_hsm_client_hsmfd_reply(msg))
fatal("Bad reply from HSM: %s", tal_hex(tmpctx, msg));
hsm_fd = fdpass_recv(ld->hsm_fd);
if (hsm_fd < 0)
fatal("Could not read fd from HSM: %s", strerror(errno));
return hsm_fd;
}
int hsm_get_client_fd(struct lightningd *ld,
const struct node_id *id,
u64 dbid,
int capabilities)
{
assert(dbid);
return hsm_get_fd(ld, id, dbid, capabilities);
}
int hsm_get_global_fd(struct lightningd *ld, int capabilities)
{
return hsm_get_fd(ld, &ld->id, 0, capabilities);
}
static unsigned int hsm_msg(struct subd *hsmd,
const u8 *msg, const int *fds UNUSED)
{
/* We only expect one thing from the HSM that's not a STATUS message */
struct node_id client_id;
u8 *bad_msg;
char *desc;
if (!fromwire_hsmstatus_client_bad_request(tmpctx, msg, &client_id,
&desc, &bad_msg))
fatal("Bad status message from hsmd: %s", tal_hex(tmpctx, msg));
/* This should, of course, never happen. */
log_broken(hsmd->log, "client %s %s (request %s)",
type_to_string(tmpctx, struct node_id, &client_id),
desc, tal_hex(tmpctx, bad_msg));
return 0;
}
void hsm_init(struct lightningd *ld)
{
u8 *msg;
int fds[2];
/* We actually send requests synchronously: only status is async. */
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds) != 0)
err(1, "Could not create hsm socketpair");
ld->hsm = new_global_subd(ld, "lightning_hsmd",
hsm_wire_type_name,
hsm_msg,
take(&fds[1]), NULL);
if (!ld->hsm)
err(1, "Could not subd hsm");
ld->hsm_fd = fds[0];
if (!wire_sync_write(ld->hsm_fd, towire_hsm_init(tmpctx,
&ld->topology->bitcoind->chainparams->bip32_key_version,
chainparams,
IFDEV(ld->dev_force_privkey, NULL),
IFDEV(ld->dev_force_bip32_seed, NULL),
IFDEV(ld->dev_force_channel_secrets, NULL),
IFDEV(ld->dev_force_channel_secrets_shaseed, NULL))))
err(1, "Writing init msg to hsm");
ld->wallet->bip32_base = tal(ld->wallet, struct ext_key);
msg = wire_sync_read(tmpctx, ld->hsm_fd);
if (!fromwire_hsm_init_reply(msg,
&ld->id, ld->wallet->bip32_base))
errx(1, "HSM did not give init reply");
}