Struct Signature 

pub struct Signature {
    pub R: ProjectivePoint,
    pub s: Scalar,
}

Ed25519 signature representation.

Signature verification libraries are expected to reject invalid field elements at the time a signature is verified.

Fields

R: ProjectivePoint

R is an EdwardsPoint, formed by using an hash function with 512-bits output to produce the digest of:

• the nonce half of the ExpandedSecretKey, and
• the message to be signed.

This digest is then interpreted as a Scalar and reduced into an element in ℤ/lℤ. The scalar is then multiplied by the distinguished basepoint to produce R, and EdwardsPoint.

s: Scalar

s is a Scalar, formed by using a hash function with 512-bits output to produce the digest of:

• the r portion of this Signature,
• the PublicKey which should be used to verify this Signature, and
• the message to be signed.

This digest is then interpreted as a Scalar and reduced into an element in ℤ/lℤ.

Implementations

impl Signature

pub fn to_bytes(&self) -> [u8; 64]

Converts the signature to a 64-byte array.

The first 32 bytes contain the compressed encoding of the R value. The last 32 bytes contain the canonical encoding of the s scalar.

pub fn from_affine_R_s(R: AffinePoint, s: Scalar) -> Self

Construct a signature from affine point R and scalar s.

Trait Implementations

impl Clone for Signature

fn clone(&self) -> Signature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl PartialEq for Signature

fn eq(&self, other: &Signature) -> 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 Copy for Signature

impl Eq for Signature

impl StructuralPartialEq for Signature