Struct Point 

pub struct Point { /* private fields */ }

Implementations

impl Point

pub fn new() -> Self

Trait Implementations

impl BinaryMarshaler for Point

fn marshal_binary(&self) -> Result<Vec<u8>, MarshallingError>

impl BinaryUnmarshaler for Point

fn unmarshal_binary(&mut self, data: &[u8]) -> Result<(), MarshallingError>

impl Clone for Point

fn clone(&self) -> Point

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Point

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

Formats the value using the given formatter.

impl Default for Point

fn default() -> Point

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Point

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Point

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

Formats the value using the given formatter.

impl Hash for Point

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 LowerHex for Point

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

Formats the value using the given formatter.

impl Marshaling for Point

fn marshal_to(&self, w: &mut impl Write) -> Result<(), MarshallingError>

Encode the contents of this object and write it to an io::Write.

fn marshal_size(&self) -> usize

Encoded length of this object in bytes.

fn unmarshal_from(&mut self, r: &mut impl Read) -> Result<(), MarshallingError>

Decode the content of this object by reading from a io::Read. If r is an [XOF], it uses r to pick a valid object pseudo-randomly, which may entail reading more than len bytes due to retries.

fn unmarshal_from_random(&mut self, r: &mut (impl Read + Stream))

fn marshal_id(&self) -> [u8; 8]

[marshal_id()] returns the type tag used in encoding/decoding

impl Ord for Point

fn cmp(&self, other: &Point) -> 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 PartialEq for Point

fn eq(&self, p2: &Self) -> bool

[eq()] is an equality test for two points on the same curve

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 PartialOrd for Point

fn partial_cmp(&self, other: &Point) -> 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 Point for Point

fn null(self) -> Self

[null()] sets [self] to the neutral element, which is (0,1) for twisted Edwards curves.

fn base(self) -> Self

[base()] sets [self] to the standard base point for this curve

fn mul(self, s: &Scalar, p: Option<&Self>) -> Self

[mul()] multiplies Point p by Scalar s using the repeated doubling method.

type SCALAR = Scalar

fn pick<S: Stream>(self, rand: &mut S) -> Self

[pick()] sets the receiver to a fresh random or pseudo-random Point.

fn set(&mut self, p: &Self) -> Self

[set()] sets the receiver equal to another Point p.

fn embed_len(&self) -> usize

[embed_len()] returns the maximum number of bytes that can be embedded in a single group element via [pick()].

fn embed<S: Stream>(self, data: Option<&[u8]>, rand: &mut S) -> Self

[embed()] encodes a limited amount of specified data in the Point, using r as a source of cryptographically secure random data. Implementations only embed the first embed_len bytes of the given data.

fn data(&self) -> Result<Vec<u8>, PointError>

[data()] extracts data embedded in a Point chosen via [embed()]. Returns an Error if doesn’t represent valid embedded data.

fn add(self, p1: &Self, p2: &Self) -> Self

[add()] adds points so that their scalars add homomorphically.

fn sub(self, p1: &Self, p2: &Self) -> Self

[sub()] subtracts points so that their scalars subtract homomorphically.

fn neg(&mut self, a: &Self) -> Self

Set to the negation of point a.

impl PointCanCheckCanonicalAndSmallOrder for Point

fn has_small_order(&self) -> bool

[has_small_order()] determines whether the group element has small order

Provides resilience against malicious key substitution attacks (M-S-UEO) and message bound security (MSB) even for malicious keys See paper https://eprint.iacr.org/2020/823.pdf for definitions and theorems

This is the same code as in https://github.com/jedisct1/libsodium/blob/4744636721d2e420f8bbe2d563f31b1f5e682229/src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c#L1170

fn is_canonical(&self, b: &[u8]) -> bool

[is_canonical()] determines whether the group element is canonical

Checks whether group element s is less than p, according to RFC8032§5.1.3.1 https://tools.ietf.org/html/rfc8032#section-5.1.3

Taken from https://github.com/jedisct1/libsodium/blob/4744636721d2e420f8bbe2d563f31b1f5e682229/src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c#L1113

The method accepts a buffer instead of calling marshal_binary() on the receiver because that always returns a value modulo prime.

impl Serialize for Point

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl UpperHex for Point

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

Formats the value using the given formatter.

impl Copy for Point

impl Eq for Point