Struct NonceGenerator 

pub struct NonceGenerator { /* private fields */ }

Monotonically increasing nonce generator.

Each session gets its own nonce generator. The counter MUST NOT be reused – nonce reuse breaks AES-GCM catastrophically.

Implementations

impl NonceGenerator

pub fn new() -> Self

Create a new nonce generator starting at counter 0.

pub fn next(&mut self, _cipher: Cipher) -> [u8; 16]

Generate the next nonce for the given cipher.

Returns the full 16-byte nonce field for the TRANSFORM_HEADER.

• CCM: 8-byte LE counter in bytes 0..8, zeros in bytes 8..16 (the cipher uses the first 11 bytes as the nonce).
• GCM: 8-byte LE counter in bytes 0..8, zeros in bytes 8..16 (the cipher uses the first 12 bytes as the nonce).

Panics

Panics if the counter overflows u64::MAX. In practice this can never happen (2^64 messages at line speed would take millennia).

Trait Implementations

impl Default for NonceGenerator

fn default() -> Self

Returns the “default value” for a type.