k256

Struct AffinePoint

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pub struct AffinePoint { /* private fields */ }
Expand description

secp256k1 curve point expressed in affine coordinates.

§serde support

When the serde feature of this crate is enabled, the Serialize and Deserialize traits are impl’d for this type.

The serialization uses the SEC1 Elliptic-Curve-Point-to-Octet-String encoding, serialized as binary.

When serialized with a text-based format, the SEC1 representation is subsequently hex encoded.

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impl AffinePoint

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pub const IDENTITY: Self = _

Additive identity of the group: the point at infinity.

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pub const GENERATOR: Self = _

Base point of secp256k1.

Gₓ = 79be667e f9dcbbac 55a06295 ce870b07 029bfcdb 2dce28d9 59f2815b 16f81798
Gᵧ = 483ada77 26a3c465 5da4fbfc 0e1108a8 fd17b448 a6855419 9c47d08f fb10d4b8

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impl Add<&AffinePoint> for &ProjectivePoint

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type Output = ProjectivePoint

The resulting type after applying the + operator.
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fn add(self, other: &AffinePoint) -> ProjectivePoint

Performs the + operation. Read more
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impl Add<&AffinePoint> for ProjectivePoint

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type Output = ProjectivePoint

The resulting type after applying the + operator.
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fn add(self, other: &AffinePoint) -> ProjectivePoint

Performs the + operation. Read more
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impl Add<AffinePoint> for ProjectivePoint

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type Output = ProjectivePoint

The resulting type after applying the + operator.
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fn add(self, other: AffinePoint) -> ProjectivePoint

Performs the + operation. Read more
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impl AddAssign<&AffinePoint> for ProjectivePoint

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fn add_assign(&mut self, rhs: &AffinePoint)

Performs the += operation. Read more
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impl AddAssign<AffinePoint> for ProjectivePoint

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fn add_assign(&mut self, rhs: AffinePoint)

Performs the += operation. Read more
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impl AffineCoordinates for AffinePoint

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type FieldRepr = GenericArray<u8, <Secp256k1 as Curve>::FieldBytesSize>

Field element representation.
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fn x(&self) -> FieldBytes

Get the affine x-coordinate as a serialized field element.
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fn y_is_odd(&self) -> Choice

Is the affine y-coordinate odd?
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impl Clone for AffinePoint

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fn clone(&self) -> AffinePoint

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl ConditionallySelectable for AffinePoint

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

Select a or b according to choice. Read more
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fn conditional_assign(&mut self, other: &Self, choice: Choice)

Conditionally assign other to self, according to choice. Read more
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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
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impl ConstantTimeEq for AffinePoint

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

Determine if two items are equal. Read more
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fn ct_ne(&self, other: &Self) -> Choice

Determine if two items are NOT equal. Read more
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impl Debug for AffinePoint

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

Formats the value using the given formatter. Read more
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impl DecompactPoint<Secp256k1> for AffinePoint

Decompaction using Taproot conventions as described in BIP 340.

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fn decompact(x_bytes: &FieldBytes) -> CtOption<Self>

Attempt to decompact an elliptic curve point
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impl DecompressPoint<Secp256k1> for AffinePoint

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fn decompress(x_bytes: &FieldBytes, y_is_odd: Choice) -> CtOption<Self>

Attempt to decompress an elliptic curve point.
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impl Default for AffinePoint

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl From<&AffinePoint> for EncodedPoint

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fn from(affine_point: &AffinePoint) -> EncodedPoint

Converts to this type from the input type.
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impl From<&AffinePoint> for ProjectivePoint

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fn from(p: &AffinePoint) -> Self

Converts to this type from the input type.
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impl From<&ProjectivePoint> for AffinePoint

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fn from(p: &ProjectivePoint) -> AffinePoint

Converts to this type from the input type.
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impl From<&PublicKey<Secp256k1>> for AffinePoint

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fn from(public_key: &PublicKey) -> AffinePoint

Converts to this type from the input type.
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impl From<AffinePoint> for EncodedPoint

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fn from(affine_point: AffinePoint) -> EncodedPoint

Converts to this type from the input type.
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impl From<AffinePoint> for ProjectivePoint

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fn from(p: AffinePoint) -> Self

Converts to this type from the input type.
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impl From<ProjectivePoint> for AffinePoint

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fn from(p: ProjectivePoint) -> AffinePoint

Converts to this type from the input type.
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impl From<PublicKey<Secp256k1>> for AffinePoint

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fn from(public_key: PublicKey) -> AffinePoint

Converts to this type from the input type.
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impl FromEncodedPoint<Secp256k1> for AffinePoint

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fn from_encoded_point(encoded_point: &EncodedPoint) -> CtOption<Self>

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

§Returns

None value if encoded_point is not on the secp256k1 curve.

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impl GroupEncoding for AffinePoint

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type Repr = GenericArray<u8, UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B1>>

The encoding of group elements. Read more
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fn from_bytes(bytes: &Self::Repr) -> CtOption<Self>

Attempts to deserialize a group element from its encoding.
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fn from_bytes_unchecked(bytes: &Self::Repr) -> CtOption<Self>

Attempts to deserialize a group element, not checking if the element is valid. Read more
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fn to_bytes(&self) -> Self::Repr

Converts this element into its byte encoding. This may or may not support encoding the identity.
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impl Mul<&Scalar> for AffinePoint

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type Output = ProjectivePoint

The resulting type after applying the * operator.
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fn mul(self, scalar: &Scalar) -> ProjectivePoint

Performs the * operation. Read more
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impl Mul<Scalar> for AffinePoint

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type Output = ProjectivePoint

The resulting type after applying the * operator.
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fn mul(self, scalar: Scalar) -> ProjectivePoint

Performs the * operation. Read more
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impl Neg for AffinePoint

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type Output = AffinePoint

The resulting type after applying the - operator.
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fn neg(self) -> Self::Output

Performs the unary - operation. Read more
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impl PartialEq<AffinePoint> for ProjectivePoint

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialEq<ProjectivePoint> for AffinePoint

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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fn identity() -> Self

Returns the identity of the group: the point at infinity.

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fn generator() -> Self

Returns the base point of secp256k1.

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fn is_identity(&self) -> Choice

Is this point the identity point?

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fn to_curve(&self) -> ProjectivePoint

Convert to curve representation.

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type Scalar = Scalar

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type Curve = ProjectivePoint

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impl Sub<&AffinePoint> for &ProjectivePoint

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type Output = ProjectivePoint

The resulting type after applying the - operator.
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fn sub(self, other: &AffinePoint) -> ProjectivePoint

Performs the - operation. Read more
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impl Sub<&AffinePoint> for ProjectivePoint

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type Output = ProjectivePoint

The resulting type after applying the - operator.
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fn sub(self, other: &AffinePoint) -> ProjectivePoint

Performs the - operation. Read more
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impl Sub<AffinePoint> for ProjectivePoint

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type Output = ProjectivePoint

The resulting type after applying the - operator.
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fn sub(self, other: AffinePoint) -> ProjectivePoint

Performs the - operation. Read more
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impl SubAssign<&AffinePoint> for ProjectivePoint

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fn sub_assign(&mut self, rhs: &AffinePoint)

Performs the -= operation. Read more
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impl SubAssign<AffinePoint> for ProjectivePoint

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fn sub_assign(&mut self, rhs: AffinePoint)

Performs the -= operation. Read more
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impl ToEncodedPoint<Secp256k1> for AffinePoint

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fn to_encoded_point(&self, compress: bool) -> EncodedPoint

Serialize this value as a SEC1 EncodedPoint, optionally applying point compression.
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impl TryFrom<&AffinePoint> for PublicKey

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(affine_point: &AffinePoint) -> Result<PublicKey>

Performs the conversion.
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impl TryFrom<&EncodedPoint<<Secp256k1 as Curve>::FieldBytesSize>> for AffinePoint

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(point: &EncodedPoint) -> Result<AffinePoint>

Performs the conversion.
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impl TryFrom<AffinePoint> for PublicKey

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(affine_point: AffinePoint) -> Result<PublicKey>

Performs the conversion.
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impl TryFrom<EncodedPoint<<Secp256k1 as Curve>::FieldBytesSize>> for AffinePoint

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(point: EncodedPoint) -> Result<AffinePoint>

Performs the conversion.
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impl VerifyPrimitive<Secp256k1> for AffinePoint

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fn verify_prehashed(&self, z: &FieldBytes, sig: &Signature) -> Result<(), Error>

Verify the prehashed message against the provided ECDSA signature. Read more
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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.
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impl Copy for AffinePoint

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impl DefaultIsZeroes for AffinePoint

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impl Eq for AffinePoint

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