Module common 

Common utilities shared across HCTR2/HCTR3 cipher implementations.

Enums

Direction

Direction of cipher operation.

Error

Unified error type for all HCTR cipher operations.

Constants

BLOCK_LENGTH

AES block length in bytes.

Functions

absorb

Absorb message into Polyval with HCTR2/HCTR3-style padding.

elk

ELK mode: Encrypted LFSR Keystream.

lfsr_next_128

LFSR next state function for 128-bit state.

lfsr_next_256

LFSR next state function for 256-bit state.

xctr

XCTR mode: counter-based stream cipher using AES.

xor_block

XOR two 16-byte blocks, storing result in the first argument.

xor_blocks

XOR two 16-byte blocks, returning a new block.

xor_blocks_3

XOR three 16-byte blocks, returning a new block.