Struct Sealer 

pub struct Sealer<A: Aead> { /* private fields */ }

Seals messages under nonces it builds itself, each used once.

Implementations

impl<A: Aead> Sealer<A>

pub fn new(key: &[u8], fixed: [u8; 4]) -> Result<Self>

A sealer whose first nonce is fixed || 0.

fixed names this sender. Any other party sealing under key must use a different one.

pub fn resume(key: &[u8], fixed: [u8; 4], counter: u64) -> Result<Self>

A sealer that continues from counter, the value a previous sealer on this key and fixed field reported from Sealer::counter when it was last used.

Restoring a counter lower than one already used reuses nonces. Persist the counter before sending what it sealed, not after.

pub fn counter(&self) -> u64

The counter the next seal will use.

pub fn seal( &mut self, aad: &[u8], in_out: &mut [u8], tag: &mut [u8], ) -> Result<[u8; 12]>

Encrypt in_out in place, write the tag, and return the nonce used.

The receiver needs the nonce, or the counter, to open the message. On failure the counter does not advance.

Trait Implementations

impl<A: Aead> Debug for Sealer<A>

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

Formats the value using the given formatter.