Struct Scalar

pub struct Scalar(pub Scalar);

Available on crate feature ed25519 only.

Ed25519 scalar

Tuple Fields

0: Scalar

Implementations

impl Scalar

pub const ONE: Self

Scalar equal to 1

pub const ZERO: Self

Scalar equal to 0

Trait Implementations

impl Additive for Scalar

fn add(a: &Self, b: &Self) -> Self

Computes a + b

fn sub(a: &Self, b: &Self) -> Self

Computes a - b

fn negate(x: &Self) -> Self

Computes -a

fn double(x: &Self) -> Self

where Self: Sized,

Takes x, returns x + x

impl Clone for Scalar

fn clone(&self) -> Scalar

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ConditionallySelectable for Scalar

fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self

Select a or b according to choice.

fn conditional_assign(&mut self, other: &Self, choice: Choice)

Conditionally assign other to self, according to choice.

fn conditional_swap(a: &mut Self, b: &mut Self, choice: Choice)

Conditionally swap self and other if choice == 1; otherwise, reassign both unto themselves.

impl ConstantTimeEq for Scalar

fn ct_eq(&self, other: &Self) -> Choice

Determine if two items are equal.

fn ct_ne(&self, other: &Self) -> Choice

Determine if two items are NOT equal.

impl Default for Scalar

fn default() -> Scalar

Returns the “default value” for a type.

impl IntegerEncoding for Scalar

type Bytes = [u8; 32]

Byte array that fits the whole encoded integer

fn to_be_bytes(&self) -> Self::Bytes

Encodes integer as bytes in big-endian byte order

fn to_le_bytes(&self) -> Self::Bytes

Encodes integer as bytes in little-endian byte order

fn from_be_bytes_exact(bytes: &Self::Bytes) -> Option<Self>

Decodes integer encoded as bytes in big-endian bytes order

fn from_le_bytes_exact(bytes: &Self::Bytes) -> Option<Self>

Decodes integer encoded as bytes in little-endian bytes order

fn from_be_bytes_mod_order(bytes: &[u8]) -> Self

Interprets bytes as big-endian encoding of an integer. Returns integer mod curve (prime) order.

fn from_le_bytes_mod_order(bytes: &[u8]) -> Self

Interprets bytes as little-endian encoding of an integer. Returns integer mod curve (prime) order.

impl Invertible for Scalar

fn invert(x: &Self) -> CtOption<Self>

Inverts $x$, returns $x^{-1}$ such that $x \cdot x^{-1} = 1$

impl Multiplicative<CurveGenerator> for Scalar

type Output = Point

Type of multiplication output

fn mul(a: &Self, _: &CurveGenerator) -> Self::Output

Computes a * b

impl Multiplicative<Point> for Scalar

type Output = Point

Type of multiplication output

fn mul(a: &Self, b: &Point) -> Self::Output

Computes a * b

impl Multiplicative<Scalar> for Scalar

type Output = Scalar

Type of multiplication output

fn mul(a: &Self, b: &Scalar) -> Self::Output

Computes a * b

impl One for Scalar

fn one() -> Self

Constructs one value of Self

fn is_one(x: &Self) -> Choice

Checks (in constant-time) if x is one

impl Ord for Scalar

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Scalar

fn eq(&self, other: &Scalar) -> bool

Tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Scalar

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Reduce<32> for Scalar

fn from_be_array_mod_order(bytes: &[u8; 32]) -> Self

Interprets bytes as big-endian encoding of an integer, returns this integer modulo curve (prime) order

fn from_le_array_mod_order(bytes: &[u8; 32]) -> Self

Interprets bytes as little-endian encoding of an integer, returns this integer modulo curve (prime) order

impl Reduce<64> for Scalar

fn from_be_array_mod_order(bytes: &[u8; 64]) -> Self

Interprets bytes as big-endian encoding of an integer, returns this integer modulo curve (prime) order

fn from_le_array_mod_order(bytes: &[u8; 64]) -> Self

Interprets bytes as little-endian encoding of an integer, returns this integer modulo curve (prime) order

impl Samplable for Scalar

fn random<R: RngCore>(rng: &mut R) -> Self

Uniformely samples a random value of Self

impl Zero for Scalar

fn zero() -> Self

Constructs zero value of Self

fn is_zero(x: &Self) -> Choice

Checks (in constant-time) if x is zero

impl Zeroize for Scalar

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.

impl Copy for Scalar

impl Eq for Scalar

impl StructuralPartialEq for Scalar