Struct EncodedPoint

pub struct EncodedPoint<Size>
where
    Size: ModulusSize,
{ /* private fields */ }

SEC1 encoded curve point.

This type is an enum over the compressed and uncompressed encodings, useful for cases where either encoding can be supported, or conversions between the two forms.

Implementations

impl<Size> EncodedPoint<Size>

where Size: ModulusSize,

pub fn from_bytes(input: impl AsRef<[u8]>) -> Result<Self>

Decode elliptic curve point (compressed or uncompressed) from the Elliptic-Curve-Point-to-Octet-String encoding described in SEC 1: Elliptic Curve Cryptography (Version 2.0) section 2.3.3 (page 10).

http://www.secg.org/sec1-v2.pdf

pub fn from_untagged_bytes( bytes: &GenericArray<u8, Size::UntaggedPointSize>, ) -> Self

Decode elliptic curve point from raw uncompressed coordinates, i.e. encoded as the concatenated x || y coordinates with no leading SEC1 tag byte (which would otherwise be 0x04 for an uncompressed point).

pub fn from_affine_coordinates( x: &GenericArray<u8, Size>, y: &GenericArray<u8, Size>, compress: bool, ) -> Self

Encode an elliptic curve point from big endian serialized coordinates (with optional point compression)

pub fn identity() -> Self

Return EncodedPoint representing the additive identity (a.k.a. point at infinity)

pub fn len(&self) -> usize

Get the length of the encoded point in bytes

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

Get byte slice containing the serialized EncodedPoint.

pub fn to_bytes(&self) -> Box<[u8]>

Get boxed byte slice containing the serialized EncodedPoint

pub fn is_compact(&self) -> bool

Is this EncodedPoint compact?

pub fn is_compressed(&self) -> bool

Is this EncodedPoint compressed?

pub fn is_identity(&self) -> bool

Is this EncodedPoint the additive identity? (a.k.a. point at infinity)

pub fn compress(&self) -> Self

Compress this EncodedPoint, returning a new EncodedPoint.

pub fn tag(&self) -> Tag

Get the SEC1 tag for this EncodedPoint

pub fn coordinates(&self) -> Coordinates<'_, Size>

Get the Coordinates for this EncodedPoint.

pub fn x(&self) -> Option<&GenericArray<u8, Size>>

Get the x-coordinate for this EncodedPoint.

Returns None if this point is the identity point.

pub fn y(&self) -> Option<&GenericArray<u8, Size>>

Get the y-coordinate for this EncodedPoint.

Returns None if this point is compressed or the identity point.

Trait Implementations

impl<Size> AsRef<[u8]> for EncodedPoint<Size>

where Size: ModulusSize,

fn as_ref(&self) -> &[u8]

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

impl<Size> Clone for EncodedPoint<Size>

where Size: ModulusSize + Clone, Size::UncompressedPointSize: Clone,

fn clone(&self) -> EncodedPoint<Size>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Size> ConditionallySelectable for EncodedPoint<Size>

where Size: ModulusSize, <Size::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

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

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<Size> Debug for EncodedPoint<Size>

where Size: ModulusSize,

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

Formats the value using the given formatter.

impl<Size> Default for EncodedPoint<Size>

where Size: ModulusSize + Default, Size::UncompressedPointSize: Default,

fn default() -> EncodedPoint<Size>

Returns the “default value” for a type.

impl<Size> Display for EncodedPoint<Size>

where Size: ModulusSize,

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

Formats the value using the given formatter.

impl<Size> FromStr for EncodedPoint<Size>

where Size: ModulusSize,

Decode a SEC1-encoded point from hexadecimal.

Upper and lower case hexadecimal are both accepted, however mixed case is rejected.

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.

impl<Size> Hash for EncodedPoint<Size>

where Size: ModulusSize,

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<Size> LowerHex for EncodedPoint<Size>

where Size: ModulusSize,

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

Formats the value using the given formatter.

impl<Size> Ord for EncodedPoint<Size>

where Size: ModulusSize,

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<Size> PartialEq for EncodedPoint<Size>

where Size: ModulusSize,

fn eq(&self, other: &Self) -> 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<Size> PartialOrd for EncodedPoint<Size>

where Size: ModulusSize,

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<Size> TryFrom<&[u8]> for EncodedPoint<Size>

where Size: ModulusSize,

type Error = Error

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<Size> UpperHex for EncodedPoint<Size>

where Size: ModulusSize,

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

Formats the value using the given formatter.

impl<Size> Zeroize for EncodedPoint<Size>

where Size: ModulusSize,

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.

impl<Size> Copy for EncodedPoint<Size>

where Size: ModulusSize, <Size::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

impl<Size: ModulusSize> Eq for EncodedPoint<Size>