CompressedPoint

monero_io

Struct CompressedPoint 

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pub struct CompressedPoint(pub [u8; 32]);
Expand description

A compressed Ed25519 point.

CompressedEdwardsY, the curve25519_dalek version of this struct exposes a CompressedEdwardsY::decompress function that does not check the point is canonically encoded. This struct exposes a CompressedPoint::decompress function that does check the point is canonically encoded, check that function for details.

Tuple Fields§

§0: [u8; 32]

Implementations§

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impl CompressedPoint

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pub fn read<R: Read>(r: &mut R) -> Result<CompressedPoint>

Read a CompressedPoint without checking if this point can be decompressed.

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pub fn write<W: Write>(&self, w: &mut W) -> Result<()>

Write a compressed point.

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

Returns the raw bytes of the compressed point.

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

Returns a reference to the raw bytes of the compressed point.

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pub fn decompress(&self) -> Option<EdwardsPoint>

Decompress a canonically-encoded Ed25519 point.

Ed25519 is of order 8 * l. This function ensures each of those 8 * l points have a singular encoding by checking points aren’t encoded with an unreduced field element, and aren’t negative when the negative is equivalent (0 == -0).

Since this decodes an Ed25519 point, it does not check the point is in the prime-order subgroup. Torsioned points do have a canonical encoding, and only aren’t canonical when considered in relation to the prime-order subgroup.

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impl Clone for CompressedPoint

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fn clone(&self) -> CompressedPoint

Returns a duplicate 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 Debug for CompressedPoint

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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 From<[u8; 32]> for CompressedPoint

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fn from(value: [u8; 32]) -> Self

Converts to this type from the input type.
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impl From<CompressedEdwardsY> for CompressedPoint

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fn from(compressed: CompressedEdwardsY) -> Self

Converts to this type from the input type.
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impl PartialEq for CompressedPoint

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fn eq(&self, other: &CompressedPoint) -> 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 Zeroize for CompressedPoint

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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.
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impl Copy for CompressedPoint

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impl Eq for CompressedPoint

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impl StructuralPartialEq for CompressedPoint

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

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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where Self: LowerExp,

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where Self: LowerHex,

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where Self: Octal,

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

Causes self to use its UpperExp implementation when Debug-formatted.
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes