add checksum to nginx log entries (no replies)

Hi,
I'm wondering if there is a ready way to add a checksum (e.g. CRC) to the end of each log entry before they get written to the "access" or "error" log files? One of the project I work on wants each log line to have its own checksum for some integrity checks.

Any hint on how I can implement these would be of great help.

Thanks,
Cheers,
Prasanna