Function hsm_secret_is_encrypted

tools/hsmtool.c:148–168

We detect an encrypted hsm_secret as a hsm_secret which is 73-bytes long. */

/* We detect an encrypted hsm_secret as a hsm_secret which is 73-bytes long. */
static bool hsm_secret_is_encrypted(const char *hsm_secret_path)
{
        switch (is_hsm_secret_encrypted(hsm_secret_path)) {
		case -1:
			err(EXITCODE_ERROR_HSM_FILE, "Cannot open '%s'", hsm_secret_path);
		case 1:
			return true;
	        case 0: {
			/* Extra sanity check on HSM file! */
			struct stat st;
			stat(hsm_secret_path, &st);
			if (st.st_size != 32)
				errx(EXITCODE_ERROR_HSM_FILE,
				     "Invalid hsm_secret '%s' (neither plaintext "
				     "nor encrypted).", hsm_secret_path);
			return false;
		}
	}

	abort();
}

static int decrypt_hsm(const char *hsm_secret_path)
{