Struct elliptic_curve::NonZeroScalar

source · [−]

pub struct NonZeroScalar<C> where
    C: Curve + ScalarArithmetic,  { /* private fields */ }

Available on crate feature arithmetic only.

Expand description

Non-zero scalar type.

This type ensures that its value is not zero, ala core::num::NonZero*. To do this, the generic S type must impl both Default and ConstantTimeEq, with the requirement that S::default() returns 0.

In the context of ECC, it’s useful for ensuring that scalar multiplication cannot result in the point at infinity.

Implementations

impl<C> NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

pub fn random(rng: impl CryptoRng + RngCore) -> Self

Generate a random NonZeroScalar.

pub fn new(scalar: Scalar<C>) -> CtOption<Self>

Create a NonZeroScalar from a scalar.

pub fn from_repr(repr: FieldBytes<C>) -> CtOption<Self>

Decode a NonZeroScalar from a big endian-serialized field element.

pub fn from_uint(uint: C::UInt) -> CtOption<Self>

Create a NonZeroScalar from a C::UInt.

Trait Implementations

impl<C> AsRef<<C as ScalarArithmetic>::Scalar> for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

fn as_ref(&self) -> &Scalar<C>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C: Clone> Clone for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

fn clone(&self) -> NonZeroScalar<C>

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<C> ConditionallySelectable for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

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

Select a or b according to choice. Read more

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

Conditionally assign other to self, according to choice. Read more

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

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

impl<C> ConstantTimeEq for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

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

Determine if two items are equal. Read more

impl<C> Deref for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

type Target = <C as ScalarArithmetic>::Scalar

The resulting type after dereferencing.

fn deref(&self) -> &Scalar<C>

Dereferences the value.

impl<C> Display for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

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

Formats the value using the given formatter. Read more

impl<C> From<&'_ NonZeroScalar<C>> for FieldBytes<C> where
C: Curve + ScalarArithmetic,

fn from(scalar: &NonZeroScalar<C>) -> FieldBytes<C>

Converts to this type from the input type.

impl<C> From<&'_ NonZeroScalar<C>> for ScalarCore<C> where
C: Curve + ScalarArithmetic,

fn from(scalar: &NonZeroScalar<C>) -> ScalarCore<C>

Converts to this type from the input type.

impl<C> From<&'_ NonZeroScalar<C>> for SecretKey<C> where
C: Curve + ProjectiveArithmetic,

fn from(scalar: &NonZeroScalar<C>) -> SecretKey<C>

Converts to this type from the input type.

impl<C> From<&'_ SecretKey<C>> for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

fn from(sk: &SecretKey<C>) -> NonZeroScalar<C>

Converts to this type from the input type.

impl<C> From<NonZeroScalar<C>> for FieldBytes<C> where
C: Curve + ScalarArithmetic,

fn from(scalar: NonZeroScalar<C>) -> FieldBytes<C>

Converts to this type from the input type.

impl<C> From<NonZeroScalar<C>> for ScalarCore<C> where
C: Curve + ScalarArithmetic,

fn from(scalar: NonZeroScalar<C>) -> ScalarCore<C>

Converts to this type from the input type.

impl<C> From<NonZeroScalar<C>> for SecretKey<C> where
C: Curve + ProjectiveArithmetic,

fn from(scalar: NonZeroScalar<C>) -> SecretKey<C>

Converts to this type from the input type.

impl<C> From<SecretKey<C>> for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

fn from(sk: SecretKey<C>) -> NonZeroScalar<C>

Converts to this type from the input type.

impl<C> FromStr for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

type Err = Error

The associated error which can be returned from parsing.

fn from_str(hex: &str) -> Result<Self>

Parses a string s to return a value of this type. Read more

impl<C> Invert for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

type Output = NonZeroScalar<C>

Field element type

fn invert(&self) -> Self

Invert a field element.

impl<C> IsHigh for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

fn is_high(&self) -> Choice

Is this scalar greater than or equal to n / 2?

impl<C> LowerHex for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

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

Formats the value using the given formatter.

impl<C> Mul<&'_ NonZeroScalar<C>> for NonZeroScalar<C> where
C: PrimeCurve + ScalarArithmetic,

type Output = NonZeroScalar<C>

The resulting type after applying the * operator.

fn mul(self, other: &Self) -> Self

Performs the * operation. Read more

impl<C> Mul<NonZeroScalar<C>> for NonZeroScalar<C> where
C: PrimeCurve + ScalarArithmetic,

type Output = NonZeroScalar<C>

The resulting type after applying the * operator.

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

Performs the * operation. Read more

impl<C> Neg for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

type Output = NonZeroScalar<C>

The resulting type after applying the - operator.

fn neg(self) -> NonZeroScalar<C>

Performs the unary - operation. Read more

impl<C, I> Reduce<I> for NonZeroScalar<C> where
    C: Curve + ScalarArithmetic,
    I: Integer + ArrayEncoding,
    Scalar<C>: ReduceNonZero<I>,

Note: implementation is the same as ReduceNonZero

fn from_uint_reduced(n: I) -> Self

Perform a modular reduction, returning a field element.

fn from_be_bytes_reduced(bytes: ByteArray<UInt>) -> Self

Interpret the given byte array as a big endian integer and perform a modular reduction. Read more

fn from_le_bytes_reduced(bytes: ByteArray<UInt>) -> Self

Interpret the given byte array as a little endian integer and perform a modular reduction. Read more

fn from_be_digest_reduced<D>(digest: D) -> Self where
D: FixedOutput<OutputSize = UInt::ByteSize>,

Available on crate feature digest only.

Interpret a digest as a big endian integer and perform a modular reduction. Read more

fn from_le_digest_reduced<D>(digest: D) -> Self where
D: FixedOutput<OutputSize = UInt::ByteSize>,

Available on crate feature digest only.

Interpret a digest as a little endian integer and perform a modular reduction. Read more

impl<C, I> ReduceNonZero<I> for NonZeroScalar<C> where
    C: Curve + ScalarArithmetic,
    I: Integer + ArrayEncoding,
    Scalar<C>: ReduceNonZero<I>,

fn from_uint_reduced_nonzero(n: I) -> Self

Perform a modular reduction, returning a field element.

impl<C> TryFrom<&'_ [u8 ]> for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

type Error = Error

The type returned in the event of a conversion error.

fn try_from(bytes: &[u8 ]) -> Result<Self>

Performs the conversion.

impl<C> UpperHex for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

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

Formats the value using the given formatter.

impl<C> Zeroize for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

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. Read more

impl<C> Copy for NonZeroScalar<C> where
C: Curve + ScalarArithmetic,

Auto Trait Implementations

impl<C> RefUnwindSafe for NonZeroScalar<C> where
<C as ScalarArithmetic>::Scalar: RefUnwindSafe,

impl<C> Send for NonZeroScalar<C>

impl<C> Sync for NonZeroScalar<C>

impl<C> Unpin for NonZeroScalar<C> where
<C as ScalarArithmetic>::Scalar: Unpin,

impl<C> UnwindSafe for NonZeroScalar<C> where
<C as ScalarArithmetic>::Scalar: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

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impl<A, T> AsBits<T> for A where
A: AsRef<[T]>,
T: BitStore,

fn as_bits<O>(&self) -> &BitSlice<T, O> where
O: BitOrder,

Views self as an immutable bit-slice region with the O ordering.

fn try_as_bits<O>(&self) -> Result<&BitSlice<T, O>, BitSpanError<T>> where
O: BitOrder,

Attempts to view self as an immutable bit-slice region with the O ordering. Read more

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T: ?Sized,

const: unstable · source

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const: unstable · source

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fn conv<T>(self) -> T where
Self: Into<T>,

Converts self into T using Into<T>. Read more

impl<T> FmtForward for T

fn fmt_binary(self) -> FmtBinary<Self> where
Self: Binary,

Causes self to use its Binary implementation when Debug-formatted. Read more

fn fmt_display(self) -> FmtDisplay<Self> where
Self: Display,

Causes self to use its Display implementation when Debug-formatted. Read more

fn fmt_lower_exp(self) -> FmtLowerExp<Self> where
Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted. Read more

fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted. Read more

fn fmt_octal(self) -> FmtOctal<Self> where
Self: Octal,

Causes self to use its Octal implementation when Debug-formatted. Read more

fn fmt_pointer(self) -> FmtPointer<Self> where
Self: Pointer,

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fn fmt_upper_exp(self) -> FmtUpperExp<Self> where
Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted. Read more

fn fmt_upper_hex(self) -> FmtUpperHex<Self> where
Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted. Read more

fn fmt_list(self) -> FmtList<Self> where
&'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more

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const: unstable · source

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Returns the argument unchanged.

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U: From<T>,

const: unstable · source

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R: 'a,

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    Self: Borrow<B>,
    B: 'a + ?Sized,
    R: 'a,

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    &'a mut self,
    func: impl FnOnce(&'a mut B) -> R
) -> R where
    Self: BorrowMut<B>,
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    R: 'a,

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    Self: AsRef<U>,
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    Self: AsMut<U>,
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    Self: Deref<Target = T>,
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    &'a mut self,
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) -> R where
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type Output = T

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🔬 This is a nightly-only experimental API. (toowned_clone_into)

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const: unstable · source

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const: unstable · source

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