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

pub trait Host {
    // Required method
    fn insecure_seed(&mut self) -> Result<(u64, u64)>;
}

Required Methods

fn insecure_seed(&mut self) -> Result<(u64, u64)>

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