Struct SaltCounter 

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

Thread-safe salt counter for shared use across multiple encryptions.

Implementations

impl SaltCounter

pub fn new() -> Self

Create a new salt counter initialized from cryptographic randomness.

Panics if the OS random source is unavailable.

pub fn from_value(value: u64) -> Self

Create a salt counter initialized to a specific value.

This is primarily for testing purposes.

pub fn next(&self) -> u64

Get the next salt value and increment the counter.

This method never returns zero. Per net-snmp behavior, zero is skipped on wraparound to avoid potential IV reuse issues.

Uses the post-increment value as the salt and a single compare_exchange to skip zero atomically, avoiding the two-fetch_add race that could cause IV reuse under concurrent access.

Trait Implementations

impl Default for SaltCounter

fn default() -> Self

Returns the “default value” for a type.