314 static int _read_mk(const char *file, char **key, int keysize)  in _read_mk()  argument
318           *key = malloc(keysize);  in _read_mk()
327           if ((read(fd, *key, keysize) != keysize)) {  in _read_mk()
328                     log_err("Cannot read %d bytes from keyfile %s.\n", keysize, file);  in _read_mk()
330                     memset(*key, 0, keysize);  in _read_mk()
340           int r = -EINVAL, keysize;  in _action_luksFormat_useMK()  local
355           keysize = (opt_key_size ?: DEFAULT_LUKS1_KEYBITS) / 8;  in _action_luksFormat_useMK()
356           if (_read_mk(opt_master_key_file, &key, keysize) < 0)  in _action_luksFormat_useMK()
367           if ((r = crypt_format(cd, CRYPT_LUKS1, cipher, cipher_mode, NULL, key, keysize, &params)))  in _action_luksFormat_useMK()
370           r = crypt_keyslot_add_by_volume_key(cd, opt_key_slot, key, keysize, NULL, 0);  in _action_luksFormat_useMK()
375                     memset(key, 0, keysize);  in _action_luksFormat_useMK()
466           int r = -EINVAL, keysize = 0;  in _action_luksAddKey_useMK()  local
476           keysize = crypt_get_volume_key_size(cd);  in _action_luksAddKey_useMK()
482           if (_read_mk(opt_master_key_file, &key, keysize) < 0)  in _action_luksAddKey_useMK()
485           r = crypt_keyslot_add_by_volume_key(cd, opt_key_slot, key, keysize, NULL, 0);  in _action_luksAddKey_useMK()
489                     memset(key, 0, keysize);  in _action_luksAddKey_useMK()