core.enc.crc¶

CRC-32 checksum computation.

Overview¶

core.enc.crc implements the standard CRC-32 algorithm using a pre-computed 256-entry lookup table (IEEE 802.3 polynomial 0xEDB88320 reflected). It is used for data integrity verification throughout the kernel.

Dependencies¶

None.

Functions and Procedures¶

CRC32¶

function CRC32(p : puint8; size : uint32) : uint32;

Computes the CRC-32 checksum of size bytes starting at pointer p. The initial value is $FFFFFFFF and the result is bitwise inverted before returning, following the standard CRC-32 finalisation step.

Notes¶

The lookup table is a compile-time constant array of 256 uint32 values. No initialisation is required at runtime.

The algorithm processes one byte at a time using the standard table-driven update: CRC = table[(CRC xor byte) and $FF] xor (CRC shr 8).

This implementation is suitable for file/block integrity checks but is not cryptographically secure.