ISH_CRC_XOROUT
vendor_crc = crc32(ISH_CRC_INIT, sys_vendor, strlen(sys_vendor)) ^ ISH_CRC_XOROUT;
strlen(product_family)) ^ ISH_CRC_XOROUT;
name_crc = crc32(ISH_CRC_INIT, product_name, strlen(product_name)) ^ ISH_CRC_XOROUT;
sku_crc = crc32(ISH_CRC_INIT, product_sku, strlen(product_sku)) ^ ISH_CRC_XOROUT;