Type Alias AffinePoint

pub type AffinePoint = AffinePoint<NistP256>;

Elliptic curve point in affine coordinates.

Aliased Type

struct AffinePoint { /* private fields */ }

Implementations

impl<C> AffinePoint<C>

where C: PrimeCurveParams,

pub const IDENTITY: AffinePoint<C>

Additive identity of the group a.k.a. the point at infinity.

pub const GENERATOR: AffinePoint<C>

Base point of the curve.

pub fn is_identity(&self) -> Choice

Is this point the point at infinity?

Trait Implementations

impl VerifyPrimitive<NistP256> for AffinePoint

fn verify_prehashed( &self, z: &GenericArray<u8, <C as Curve>::FieldBytesSize>, sig: &Signature<C>, ) -> Result<(), Error>

Verify the prehashed message against the provided ECDSA signature.

fn verify_digest<D>( &self, msg_digest: D, sig: &Signature<C>, ) -> Result<(), Error>

where D: FixedOutput<OutputSize = <C as Curve>::FieldBytesSize>,

Verify message digest against the provided signature.

impl<C> AffineCoordinates for AffinePoint<C>

where C: PrimeCurveParams,

type FieldRepr = GenericArray<u8, <C as Curve>::FieldBytesSize>

Field element representation.

fn x(&self) -> GenericArray<u8, <C as Curve>::FieldBytesSize>

Get the affine x-coordinate as a serialized field element.

fn y_is_odd(&self) -> Choice

Is the affine y-coordinate odd?

impl<C> Clone for AffinePoint<C>

where C: Clone + PrimeCurveParams, <C as PrimeCurveParams>::FieldElement: Clone,

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<C> ConditionallySelectable for AffinePoint<C>

where C: PrimeCurveParams,

fn conditional_select( a: &AffinePoint<C>, b: &AffinePoint<C>, choice: Choice, ) -> AffinePoint<C>

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<C> ConstantTimeEq for AffinePoint<C>

where C: PrimeCurveParams,

fn ct_eq(&self, other: &AffinePoint<C>) -> Choice

Determine if two items are equal.

impl<C> Debug for AffinePoint<C>

where C: Debug + PrimeCurveParams, <C as PrimeCurveParams>::FieldElement: Debug,

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

Formats the value using the given formatter.

impl<C> DecompactPoint<C> for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy,

fn decompact( x_bytes: &GenericArray<u8, <C as Curve>::FieldBytesSize>, ) -> CtOption<AffinePoint<C>>

Attempt to decompact an elliptic curve point

impl<C> DecompressPoint<C> for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy,

fn decompress( x_bytes: &GenericArray<u8, <C as Curve>::FieldBytesSize>, y_is_odd: Choice, ) -> CtOption<AffinePoint<C>>

Attempt to decompress an elliptic curve point.

impl<C> Default for AffinePoint<C>

where C: PrimeCurveParams,

fn default() -> AffinePoint<C>

Returns the “default value” for a type.

impl<C> From<&ProjectivePoint<C>> for AffinePoint<C>

where C: PrimeCurveParams,

fn from(p: &ProjectivePoint<C>) -> AffinePoint<C>

Converts to this type from the input type.

impl<C> From<&PublicKey<C>> for AffinePoint<C>

where C: PrimeCurveParams,

fn from(public_key: &PublicKey<C>) -> AffinePoint<C>

Converts to this type from the input type.

impl<C> From<ProjectivePoint<C>> for AffinePoint<C>

where C: PrimeCurveParams,

fn from(p: ProjectivePoint<C>) -> AffinePoint<C>

Converts to this type from the input type.

impl<C> From<PublicKey<C>> for AffinePoint<C>

where C: PrimeCurveParams,

fn from(public_key: PublicKey<C>) -> AffinePoint<C>

Converts to this type from the input type.

impl<C> FromEncodedPoint<C> for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy,

fn from_encoded_point( encoded_point: &EncodedPoint<<C as Curve>::FieldBytesSize>, ) -> CtOption<AffinePoint<C>>

Attempts to parse the given EncodedPoint as an SEC1-encoded AffinePoint.

Returns

None value if encoded_point is not on the secp384r1 curve.

impl<C> GroupEncoding for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy, <<<C as Curve>::FieldBytesSize as ModulusSize>::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

fn from_bytes( bytes: &<AffinePoint<C> as GroupEncoding>::Repr, ) -> CtOption<AffinePoint<C>>

NOTE: not constant-time with respect to identity point

type Repr = GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>

The encoding of group elements.

fn from_bytes_unchecked( bytes: &<AffinePoint<C> as GroupEncoding>::Repr, ) -> CtOption<AffinePoint<C>>

Attempts to deserialize a group element, not checking if the element is valid.

fn to_bytes(&self) -> <AffinePoint<C> as GroupEncoding>::Repr

Converts this element into its byte encoding. This may or may not support encoding the identity.

impl<C, S> Mul<S> for AffinePoint<C>

where C: PrimeCurveParams, S: Borrow<<C as CurveArithmetic>::Scalar>, ProjectivePoint<C>: Double,

type Output = ProjectivePoint<C>

The resulting type after applying the * operator.

fn mul(self, scalar: S) -> ProjectivePoint<C>

Performs the * operation.

impl<C> Neg for AffinePoint<C>

where C: PrimeCurveParams,

type Output = AffinePoint<C>

The resulting type after applying the - operator.

fn neg(self) -> AffinePoint<C>

Performs the unary - operation.

impl<C> PartialEq for AffinePoint<C>

where C: PrimeCurveParams,

fn eq(&self, other: &AffinePoint<C>) -> bool

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

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<C> PrimeCurveAffine for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, ProjectivePoint<C>: Double, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy, <<<C as Curve>::FieldBytesSize as ModulusSize>::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

type Curve = ProjectivePoint<C>

type Scalar = <C as CurveArithmetic>::Scalar

fn identity() -> AffinePoint<C>

Returns the additive identity.

fn generator() -> AffinePoint<C>

Returns a fixed generator of unknown exponent.

fn is_identity(&self) -> Choice

Determines if this point represents the point at infinity; the additive identity.

fn to_curve(&self) -> ProjectivePoint<C>

Converts this element to its curve representation.

impl<C> ToCompactEncodedPoint<C> for AffinePoint<C>

where C: PrimeCurveParams, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy, <<<C as Curve>::FieldBytesSize as ModulusSize>::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

fn to_compact_encoded_point( &self, ) -> CtOption<EncodedPoint<<C as Curve>::FieldBytesSize>>

Serialize this value as a SEC1 compact EncodedPoint

impl<C> ToEncodedPoint<C> for AffinePoint<C>

where C: PrimeCurveParams, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy, <<<C as Curve>::FieldBytesSize as ModulusSize>::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

fn to_encoded_point( &self, compress: bool, ) -> EncodedPoint<<C as Curve>::FieldBytesSize>

Serialize this value as a SEC1 EncodedPoint, optionally applying point compression.

impl<C> TryFrom<&EncodedPoint<<C as Curve>::FieldBytesSize>> for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy,

type Error = Error

The type returned in the event of a conversion error.

fn try_from( point: &EncodedPoint<<C as Curve>::FieldBytesSize>, ) -> Result<AffinePoint<C>, Error>

Performs the conversion.

impl<C> TryFrom<EncodedPoint<<C as Curve>::FieldBytesSize>> for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy,

type Error = Error

The type returned in the event of a conversion error.

fn try_from( point: EncodedPoint<<C as Curve>::FieldBytesSize>, ) -> Result<AffinePoint<C>, Error>

Performs the conversion.

impl<C> Copy for AffinePoint<C>

where C: Copy + PrimeCurveParams, <C as PrimeCurveParams>::FieldElement: Copy,

impl<C> DefaultIsZeroes for AffinePoint<C>

where C: PrimeCurveParams,

impl<C> Eq for AffinePoint<C>

where C: PrimeCurveParams,