Trait ring::aead::NonceSequence [−][src]
A sequences of unique nonces.
A given NonceSequence
must never return the same Nonce
twice from
advance()
.
A simple counter is a reasonable (but probably not ideal) NonceSequence
.
Intentionally not Clone
or Copy
since cloning would allow duplication
of the sequence.
Required methods
fn advance(&mut self) -> Result<Nonce, Unspecified>
[src]
Returns the next nonce in the sequence.
This may fail if “too many” nonces have been requested, where how many
is too many is up to the implementation of NonceSequence
. An
implementation may that enforce a maximum number of records are
sent/received under a key this way. Once advance()
fails, it must
fail for all subsequent calls.