Struct RandomOracle 

pub struct RandomOracle { /* private fields */ }

Random Oracle from SHA3-512.

• prefix should be globally unique.
• evaluate serializes the given input and outputs SHA3-512(prefix_len as big-endian u32 | prefix | input).
• Subprotocols may use a prefix that is extended from the prefix of its parent protocol, by deriving a new instance using extend, which simply concatenates the strings with the separator “-”. E.g., RandomOracle::new(“abc”).extend(“def”) = RandomOracle::new(“abc-def”).

The caller must make sure to:

• Choose distinct prefix & extension strings, preferably without “-” in them (asserted in debug mode).
• Ensure that the length of prefix & extension is small enough to fit in u32. Violating this constraint will cause a panic.

Implementations

impl RandomOracle

pub fn new(initial_prefix: &str) -> Self

Create a fresh random oracle with a given “session id”/prefix.

pub fn evaluate<T: Serialize>(&self, obj: &T) -> [u8; 64]

Evaluate the random oracle on a given input.

pub fn extend(&self, extension: &str) -> Self

Derive a new random oracle from the current one and additional string (can be done multiple times).

Trait Implementations

impl Clone for RandomOracle

fn clone(&self) -> RandomOracle

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RandomOracle

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RandomOracle

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for RandomOracle

impl PartialEq for RandomOracle

fn eq(&self, other: &RandomOracle) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for RandomOracle

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for RandomOracle