Struct Challenge 

pub struct Challenge {
    pub nonce: [u8; 32],
    pub issued_at: DateTime<Utc>,
    pub window: Duration,
}

A challenge issued to a device signer: a fresh 256-bit nonce and a validity window. Authenticity is established by the ability to produce a timely, nonce-bound response — a static copy of a prior artifact cannot satisfy the challenge.

Fields

nonce: [u8; 32]

The nonce (>= 128 bits of entropy; we use 256).

issued_at: DateTime<Utc>

When the challenge was issued.

window: Duration

Freshness window.

Implementations

impl Challenge

pub fn generate(window: Duration) -> SignatifResult<Self>

Generate a challenge with an OS-random nonce.

Errors

Returns a revocation-category error if the OS RNG fails.

pub fn expected_payload(&self) -> Value

The canonical payload the response artifact must carry: the nonce bound into a deterministic JSON object.

pub fn verify_response( &self, response_payload: &Value, now: DateTime<Utc>, ) -> SignatifResult<()>

Verify a response artifact’s payload: the nonce must match and the response must be inside the freshness window.

Errors

Returns an artifact-format error on nonce mismatch or expiry.

Trait Implementations

impl Clone for Challenge

fn clone(&self) -> Challenge

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Challenge

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

Formats the value using the given formatter.