Module fletcher 

Fletcher-64 checksum used by APFS.

Every on-disk object has a 64-bit checksum at offset 0, computed over bytes 8..block_size using a modular Fletcher-64 variant.

Functions

fletcher64

Compute APFS Fletcher-64 checksum over a byte slice.

verify_object

Verify the Fletcher-64 checksum of an APFS on-disk object block.