Struct secret_integers::U8

impl U8

pub fn classify<T: Into<u8>>(x: T) -> Self

Examples found in repository ?

examples/chacha20.rs (line 70)

fn chacha20_block(k: &Key, counter: U32, nonce: &Nonce) -> Block {
    let st = chacha20(k, counter, nonce);
    let mut block = [U8::classify(0u8); BLOCK_SIZE];
    block.copy_from_slice(U32::to_le_bytes(&st).as_slice());
    block
}

pub fn declassify(self) -> u8

Warning: use with caution, breaks the constant-time guarantee.

pub fn zero() -> Self

Examples found in repository ?

examples/chacha20.rs (line 89)

fn chacha20_counter_mode(key: &Key, counter: U32, nonce: &Nonce, msg: &Vec<U8>) -> Vec<U8> {
    let mut blocks: Vec<[U8; BLOCK_SIZE]> = msg
        .chunks(BLOCK_SIZE)
        .map(|block| {
            let mut new_block = [U8::zero(); BLOCK_SIZE];
            new_block[0..block.len()].copy_from_slice(block);
            new_block
        })
        .collect();
    let nb_blocks = blocks.len();
    let mut key_block: [U8; BLOCK_SIZE];
    let mut ctr = counter;
    for i in 0..blocks.len() - 1 {
        key_block = chacha20_block(key, ctr, nonce);
        blocks[i] = xor_block(&blocks[i], &key_block);
        ctr += U32::one();
    }
    let last = &mut blocks[nb_blocks - 1];
    key_block = chacha20_block(key, ctr, nonce);
    *last = xor_block(last, &key_block);
    blocks
        .iter()
        .map(|block| block.to_vec())
        .flatten()
        .take(msg.len())
        .collect()
}

pub fn checked_add(self, rhs: Self) -> Self

Warning: panics when overflow.

impl U8

pub fn checked_sub(self, rhs: Self) -> Self

Warning: panics when overflow.

impl U8

pub fn checked_mul(self, rhs: Self) -> Self

Warning: panics when overflow.

impl U8

pub fn rotate_left(self, rotval: usize) -> Self

pub fn rotate_right(self, rotval: usize) -> Self

impl U8

Constant-time comparison operators

pub fn comp_eq(self, rhs: Self) -> Self

Produces a new integer which is all ones if the two arguments are equal and all zeroes otherwise. With inspiration from Wireguard.

pub fn comp_ne(self, rhs: Self) -> Self

Produces a new integer which is all ones if the first argument is different from the second argument, and all zeroes otherwise.

pub fn comp_gte(self, rhs: Self) -> Self

Produces a new integer which is all ones if the first argument is greater than or equal to the second argument, and all zeroes otherwise. With inspiration from WireGuard.

pub fn comp_gt(self, rhs: Self) -> Self

Produces a new integer which is all ones if the first argument is strictly greater than the second argument, and all zeroes otherwise.

pub fn comp_lte(self, rhs: Self) -> Self

Produces a new integer which is all ones if the first argument is less than or equal to the second argument, and all zeroes otherwise.

pub fn comp_lt(self, rhs: Self) -> Self

Produces a new integer which is all ones if the first argument is strictly less than the second argument, and all zeroes otherwise.

Trait Implementations§

impl Add<U8> for U8

Warning: has wrapping semantics.

type Output = U8

The resulting type after applying the + operator.

fn add(self, rhs: Self) -> Self

Performs the + operation. Read more

impl AddAssign<U8> for U8

Warning: has wrapping semantics.

fn add_assign(&mut self, rhs: Self)

Performs the += operation. Read more

impl BitAnd<U8> for U8

type Output = U8

The resulting type after applying the & operator.

fn bitand(self, rhs: Self) -> Self

Performs the & operation. Read more

impl BitAndAssign<U8> for U8

fn bitand_assign(&mut self, rhs: Self)

Performs the &= operation. Read more

impl BitOr<U8> for U8

type Output = U8

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self

Performs the | operation. Read more

impl BitOrAssign<U8> for U8

fn bitor_assign(&mut self, rhs: Self)

Performs the |= operation. Read more

impl BitXor<U8> for U8

type Output = U8

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: Self) -> Self

Performs the ^ operation. Read more

impl BitXorAssign<U8> for U8

fn bitxor_assign(&mut self, rhs: Self)

Performs the ^= operation. Read more

impl Clone for U8

fn clone(&self) -> U8

Returns a copy of the value. Read more

1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for U8

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

impl Default for U8

fn default() -> U8

Returns the “default value” for a type. Read more

impl Display for U8

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more