Struct libsecp256k1_core::curve::Scalar

pub struct Scalar(pub [u32; 8]);

A 256-bit scalar value.

Tuple Fields

0: [u32; 8]

Implementations

impl Scalar

pub fn clear(&mut self)

Clear a scalar to prevent the leak of sensitive data.

pub fn set_int(&mut self, v: u32)

Set a scalar to an unsigned integer.

pub fn from_int(v: u32) -> Self

Create a scalar from an unsigned integer.

pub fn bits(&self, offset: usize, count: usize) -> u32

Access bits from a scalar. All requested bits must belong to the same 32-bit limb.

pub fn bits_var(&self, offset: usize, count: usize) -> u32

Access bits from a scalar. Not constant time.

pub fn cadd_bit(&mut self, bit: usize, flag: bool)

Conditionally add a power of two to a scalar. The result is not allowed to overflow.

pub fn set_b32(&mut self, b32: &[u8; 32]) -> Choice

Set a scalar from a big endian byte array, return whether it overflowed.

pub fn b32(&self) -> [u8; 32]

Convert a scalar to a byte array.

pub fn fill_b32(&self, bin: &mut [u8; 32])

Convert a scalar to a byte array.

pub fn is_zero(&self) -> bool

Check whether a scalar equals zero.

pub fn is_one(&self) -> bool

Check whether a scalar equals one.

pub fn is_high(&self) -> bool

Check whether a scalar is higher than the group order divided by 2.

pub fn cond_neg_assign(&mut self, flag: Choice)

Conditionally negate a number, in constant time.

impl Scalar

pub fn mul_in_place(&mut self, a: &Scalar, b: &Scalar)

pub fn shr_int(&mut self, n: usize) -> u32

Shift a scalar right by some amount strictly between 0 and 16, returning the low bits that were shifted off.

pub fn sqr_in_place(&mut self, a: &Scalar)

pub fn sqr(&self) -> Scalar

pub fn inv_in_place(&mut self, x: &Scalar)

pub fn inv(&self) -> Scalar

pub fn inv_var(&self) -> Scalar

pub fn is_even(&self) -> bool

Trait Implementations

impl<'a, 'b> Add<&'a Scalar> for &'b Scalar

type Output = Scalar

The resulting type after applying the + operator.

fn add(self, other: &'a Scalar) -> Scalar

Performs the + operation.

impl Add<Scalar> for Scalar

type Output = Scalar

The resulting type after applying the + operator.

fn add(self, other: Scalar) -> Scalar

Performs the + operation.

impl<'a> AddAssign<&'a Scalar> for Scalar

fn add_assign(&mut self, other: &'a Scalar)

Performs the += operation.

impl AddAssign<Scalar> for Scalar

fn add_assign(&mut self, other: Scalar)

Performs the += operation.

impl Clone for Scalar

fn clone(&self) -> Scalar

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Scalar

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

Formats the value using the given formatter.

impl Default for Scalar

fn default() -> Scalar

Returns the “default value” for a type.

impl LowerHex for Scalar

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

Formats the value using the given formatter.

impl<'a, 'b> Mul<&'a Scalar> for &'b Scalar

type Output = Scalar

The resulting type after applying the * operator.

fn mul(self, other: &'a Scalar) -> Scalar

Performs the * operation.

impl Mul<Scalar> for Scalar

type Output = Scalar

The resulting type after applying the * operator.

fn mul(self, other: Scalar) -> Scalar

Performs the * operation.

impl<'a> MulAssign<&'a Scalar> for Scalar

fn mul_assign(&mut self, other: &'a Scalar)

Performs the *= operation.

impl MulAssign<Scalar> for Scalar

fn mul_assign(&mut self, other: Scalar)

Performs the *= operation.

impl<'a> Neg for &'a Scalar

type Output = Scalar

The resulting type after applying the - operator.

fn neg(self) -> Scalar

Performs the unary - operation.

impl Neg for Scalar

type Output = Scalar

The resulting type after applying the - operator.

fn neg(self) -> Scalar

Performs the unary - operation.

impl PartialEq<Scalar> for Scalar

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for Scalar

impl Eq for Scalar

impl StructuralEq for Scalar

impl StructuralPartialEq for Scalar