Trait ElementOps

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pub trait ElementOps: ScalarOps {
    type Element: Copy + Add<Output = Self::Element> + Sub<Output = Self::Element> + Neg<Output = Self::Element> + for<'a> Mul<&'a Self::Scalar, Output = Self::Element> + PartialEq + Debug;

    const ELEMENT_SIZE: usize;

    // Required methods
    fn identity() -> Self::Element;
    fn is_identity(element: &Self::Element) -> bool;
    fn generator() -> Self::Element;
    fn serialize_element(element: &Self::Element, output: &mut [u8]);
    fn deserialize_element(buffer: &[u8]) -> Option<Self::Element>;
}

Expand description

Helper trait for Group that describes operations on group elements (i.e., EC points for elliptic curve groups).

Required Associated Constants§

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const ELEMENT_SIZE: usize

Byte size of a serialized Self::Element.

Required Associated Types§

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type Element: Copy + Add<Output = Self::Element> + Sub<Output = Self::Element> + Neg<Output = Self::Element> + for<'a> Mul<&'a Self::Scalar, Output = Self::Element> + PartialEq + Debug

Element of the group. Arithmetic operations requested here (addition among elements and multiplication by a Scalar) must be constant-time.

Required Methods§

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fn identity() -> Self::Element

Returns the identity of the group (aka point at infinity for EC groups).

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fn is_identity(element: &Self::Element) -> bool

Checks if the specified element is the identity.

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fn generator() -> Self::Element

Returns the agreed-upon generator of the group.

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fn serialize_element(element: &Self::Element, output: &mut [u8])

Serializes element into the provided buffer, which is guaranteed to have length Self::ELEMENT_SIZE.

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fn deserialize_element(buffer: &[u8]) -> Option<Self::Element>

Deserializes an element from buffer, which is guaranteed to have length Self::ELEMENT_SIZE. This method returns None if the buffer does not correspond to a representation of a valid scalar.