Trait wasmtime_wasi::preview2::command::wasi::random::insecure_seed::Host

pub trait Host {
    // Required method
    fn insecure_seed<'life0, 'async_trait>(
        &'life0 mut self
    ) -> Pin<Box<dyn Future<Output = Result<(u64, u64)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}

Required Methods

fn insecure_seed<'life0, 'async_trait>( &'life0 mut self ) -> Pin<Box<dyn Future<Output = Result<(u64, u64)>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Return a 128-bit value that may contain a pseudo-random value.

The returned value is not required to be computed from a CSPRNG, and may even be entirely deterministic. Host implementations are encouraged to provide pseudo-random values to any program exposed to attacker-controlled content, to enable DoS protection built into many languages’ hash-map implementations.

This function is intended to only be called once, by a source language to initialize Denial Of Service (DoS) protection in its hash-map implementation.

Expected future evolution

This will likely be changed to a value import, to prevent it from being called multiple times and potentially used for purposes other than DoS protection.

Implementors