Struct curve25519_dalek::backend::serial::u64::scalar::Scalar52

pub struct Scalar52(pub [u64; 5]);

The Scalar52 struct represents an element in \(\mathbb Z / \ell \mathbb Z\) as 5 \(52\)-bit limbs.

Methods

impl Scalar52

fn pack(&self) -> Scalar

Pack the limbs of this UnpackedScalar into a Scalar.

pub fn montgomery_invert(&self) -> Scalar52

Inverts an UnpackedScalar in Montgomery form.

pub fn invert(&self) -> Scalar52

Inverts an UnpackedScalar not in Montgomery form.

impl Scalar52

pub fn zero() -> Scalar52

Return the zero scalar

pub fn from_bytes(bytes: &[u8; 32]) -> Scalar52

Unpack a 32 byte / 256 bit scalar into 5 52-bit limbs.

pub fn from_bytes_wide(bytes: &[u8; 64]) -> Scalar52

Reduce a 64 byte / 512 bit scalar mod l

pub fn to_bytes(&self) -> [u8; 32]

Pack the limbs of this Scalar52 into 32 bytes

pub fn add(a: &Scalar52, b: &Scalar52) -> Scalar52

Compute a + b (mod l)

pub fn sub(a: &Scalar52, b: &Scalar52) -> Scalar52

Compute a - b (mod l)

pub(crate) fn mul_internal(a: &Scalar52, b: &Scalar52) -> [u128; 9]

Compute a * b

fn square_internal(a: &Scalar52) -> [u128; 9]

Compute a^2

pub(crate) fn montgomery_reduce(limbs: &[u128; 9]) -> Scalar52

Compute limbs/R (mod l), where R is the Montgomery modulus 2^260

pub fn mul(a: &Scalar52, b: &Scalar52) -> Scalar52

Compute a * b (mod l)

pub fn square(&self) -> Scalar52

Compute a^2 (mod l)

pub fn montgomery_mul(a: &Scalar52, b: &Scalar52) -> Scalar52

Compute (a * b) / R (mod l), where R is the Montgomery modulus 2^260

pub fn montgomery_square(&self) -> Scalar52

Compute (a^2) / R (mod l) in Montgomery form, where R is the Montgomery modulus 2^260

pub fn to_montgomery(&self) -> Scalar52

Puts a Scalar52 in to Montgomery form, i.e. computes a*R (mod l)

pub fn from_montgomery(&self) -> Scalar52

Takes a Scalar52 out of Montgomery form, i.e. computes a/R (mod l)

Trait Implementations

impl Clone for Scalar52

fn clone(&self) -> Scalar52

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Scalar52

impl Debug for Scalar52

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

Formats the value using the given formatter.

impl Index<usize> for Scalar52

type Output = u64

The returned type after indexing.

fn index(&self, _index: usize) -> &u64

Performs the indexing (container[index]) operation.

impl IndexMut<usize> for Scalar52

fn index_mut(&mut self, _index: usize) -> &mut u64

Performs the mutable indexing (container[index]) operation.

impl Zeroize for Scalar52

fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not "optimized away" by the compiler.