Struct Nonce 

pub struct Nonce(/* private fields */);

Nonce of the Falcon signature.

Implementations

impl Nonce

pub fn deterministic() -> Nonce

Returns a new deterministic Nonce.

This is used in deterministic signing following 1 and is composed of two parts:

1. a byte serving as a version byte,
2. a pre-versioned fixed nonce which is the UTF8 encoding of the domain separator “FALCON-POSEIDON2-DET” padded with enough zeros to make it of size 39 bytes.

The usefulness of the notion of versioned fixed nonce is discussed in Section 2.1 in 1.

pub fn as_bytes(&self) -> [u8; 40]

Returns the underlying concatenated bytes of this nonce.

pub fn from_bytes(nonce_bytes: [u8; 40]) -> Nonce

Returns a Nonce given an array of bytes.

pub fn to_elements(&self) -> [Felt; 8]

Converts byte representation of the nonce into field element representation.

Nonce bytes are converted to field elements by taking consecutive 5 byte chunks of the nonce and interpreting them as field elements.

Trait Implementations

impl Clone for Nonce

fn clone(&self) -> Nonce

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Nonce

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

Formats the value using the given formatter.

impl Deserializable for Nonce

fn read_from<R>(source: &mut R) -> Result<Nonce, DeserializationError>

where R: ByteReader,

Reads a sequence of bytes from the provided source, attempts to deserialize these bytes into Self, and returns the result.

fn min_serialized_size() -> usize

Returns the minimum serialized size for one instance of this type.

fn read_from_bytes(bytes: &[u8]) -> Result<Self, DeserializationError>

Attempts to deserialize the provided bytes into Self and returns the result.

fn read_from_bytes_with_budget( bytes: &[u8], budget: usize, ) -> Result<Self, DeserializationError>

Deserializes Self from bytes with a byte budget limit.

impl PartialEq for Nonce

fn eq(&self, other: &Nonce) -> 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 Serializable for &Nonce

fn write_into<W>(&self, target: &mut W)

where W: ByteWriter,

Serializes self into bytes and writes these bytes into the target.

fn to_bytes(&self) -> Vec<u8>

Serializes self into a vector of bytes.

fn get_size_hint(&self) -> usize

Returns an estimate of how many bytes are needed to represent self.

impl Eq for Nonce

impl StructuralPartialEq for Nonce