Function load_hsm

hsmd/hsmd.c:427–466

~ We always load the HSM file, even if we just created it above. This * both unifies the code paths, and provides a nice sanity check that the * file contents are as they will be for future invocations. */

 * both unifies the code paths, and provides a nice sanity check that the
 * file contents are as they will be for future invocations. */
static void load_hsm(const char *passphrase)
{
	u8 *hsm_secret_contents;
	struct hsm_secret *hsms;
	enum hsm_secret_error err;

	/* Read the hsm_secret file */
	hsm_secret_contents = grab_file_raw(tmpctx, "hsm_secret");
	if (!hsm_secret_contents) {
		hsmd_send_init_reply_failure(HSM_SECRET_ERR_INVALID_FORMAT, STATUS_FAIL_INTERNAL_ERROR,
			                        "Could not read hsm_secret: %s", strerror(errno));
	}

	/* Extract the secret using the new hsm_secret module */
	hsms = extract_hsm_secret(tmpctx, hsm_secret_contents,
				  tal_bytelen(hsm_secret_contents),
				  passphrase, &err);
	if (!hsms) {
		/* Wrong passphrase is user error, not internal error - exit cleanly  */
		if (err == HSM_SECRET_ERR_WRONG_PASSPHRASE) {
			u8 *msg = towire_hsmd_init_reply_failure(NULL, err,
								 tal_fmt(tmpctx,
									 "Failed to load hsm_secret: %s",
									 hsm_secret_error_str(err)));
			wire_sync_write(REQ_FD, msg);
			exit(0);
		}
		hsmd_send_init_reply_failure(err, STATUS_FAIL_INTERNAL_ERROR,
			                        "Failed to load hsm_secret: %s", hsm_secret_error_str(err));
	}

	/* Allocate and populate our global hsm_secret */
	hsm_secret = tal(NULL, struct hsm_secret);
	hsm_secret->secret_data = tal_steal(hsm_secret, hsms->secret_data);
	hsm_secret->type = hsms->type;
	hsm_secret->mnemonic = tal_steal(hsm_secret, hsms->mnemonic);

	/*~ Don't swap this secret data to disk for security. */
	mlock_tal_memory(hsm_secret->secret_data);
}

/*~ We have a pre-init call in developer mode, to set dev flags */
static struct io_plan *preinit_hsm(struct io_conn *conn,