GChecksum *csum = g_checksum_new(G_CHECKSUM_SHA256);
g_checksum_update(csum, data->data, data->len);
gchar *name = g_strdup(g_checksum_get_string(csum));
GChecksum *csum = g_checksum_new(G_CHECKSUM_SHA256);
g_checksum_update(csum, data->data, data->len);
gchar *name = g_strdup(g_checksum_get_string(csum));