pub trait SecureRandom:
Send
+ Sync
+ Debug {
// Required method
fn fill(&self, buf: &mut [u8]) -> Result<(), GetRandomFailed>;
// Provided method
fn fips(&self) -> bool { ... }
}A source of cryptographically secure randomness.
SourceFill the given buffer with random bytes.
The bytes must be sourced from a cryptographically secure random number generator seeded with good quality, secret entropy.
This is used for all randomness required by rustls, but not necessarily randomness required by the underlying cryptography library. For example: SupportedKxGroup::start() requires random material to generate an ephemeral key exchange key, but this is not included in the interface with rustls: it is assumed that the cryptography library provides for this itself.
Return true if this is backed by a FIPS-approved implementation.
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