Struct RC5ControlBlock 

pub struct RC5ControlBlock<W: Word> { /* private fields */ }

RC5 control block

This struct represents the internal state of an RC5 cipher with a given word size. It encapsulates key expansion (S table), the number of rounds, and a computed version tag.

Parameters:

• W: The word type (e.g., u16, u32, u64), which must implement the Word trait.

Implementations

impl<W: Word> RC5ControlBlock<W>

pub fn new<K>(key: K, rounds: usize) -> Result<Self, Reason>

where K: AsRef<[u8]>,

RC5 constructor method

It creates an instance of an RC5 control block from raw key and rounds.

Returns a result type containing the control block.

pub fn s_table(&self) -> &[W]

Returns a reference to the expanded S table used for round keys.

pub fn rounds(&self) -> usize

pub fn parametric_version(&self) -> String

Returns a string describing the parametric RC5 version, e.g. "RC5-32/12/16".

Trait Implementations

impl<W: Word> BlockCipher<W, 2> for RC5ControlBlock<W>

fn encrypt(&self, pt: [W; 2]) -> [W; 2]

Raw encryption, encrypt a single [W;N] block.

fn decrypt(&self, ct: [W; 2]) -> [W; 2]

Raw decryption, decrypt a single [W;N] block.

fn generate_blocks(&self, pt: Vec<u8>) -> Vec<[W; 2]>

Split a byte‐vector into a Vec of length-N word blocks. More generally, it creates a list of blocks from a stream of plain bytes.

fn generate_bytes_stream(&self, blocks: Vec<[W; 2]>) -> Vec<u8>

Generates a stream of bytes from a list of blocks. More specefically from N word blocks list generates byte-vector. Its counterfiet of generate_blocks method.

fn control_block_version(&self) -> String

Human‐readable version tag, mostly a parametric version. e.g. in RC5-block-cipher “RC5-32/12/16”.

fn block_size(&self) -> usize

Base block-size in bytes for a block-cipher.

fn word_size(&self) -> usize

Word-szie in bytes per block for a block-cipher.