Struct ExpandedKeypair 

pub struct ExpandedKeypair {
    pub(crate) secret: ExpandedSecretKey,
    pub(crate) public: PublicKey,
}

A variant of Keypair containing an ExpandedSecretKey.

In the Tor protocol, we use this type for blinded onion service identity keys (KS_hs_blind_id). Since their scalar values are computed, rather than taken directly from a SHA-512 transformation of a SecretKey, we cannot use the regular Keypair type.

Fields

secret: ExpandedSecretKey

public: PublicKey

Implementations

impl ExpandedKeypair

pub fn public(&self) -> &PublicKey

Return the public part of this expanded keypair.

pub fn sign(&self, message: &[u8]) -> Signature

Compute a signature over a message using this keypair.

pub fn to_secret_key_bytes(&self) -> [u8; 64]

Return a representation of the secret key in this keypair.

(Since it is an expanded secret key, we represent it as its scalar part followed by its hash_prefix.)

pub fn from_secret_key_bytes(bytes: [u8; 64]) -> Option<ExpandedKeypair>

Reconstruct a key from its byte representation as returned by to_secret_key_bytes().

Return None if the input cannot be the output of to_secret_key_bytes().

Trait Implementations

impl AsRef<ExpandedKeypair> for HsBlindIdKeypair

fn as_ref(&self) -> &ExpandedKeypair

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<ExpandedKeypair> for HsIdKeypair

fn as_ref(&self) -> &ExpandedKeypair

Converts this type into a shared reference of the (usually inferred) input type.

impl ConstantTimeEq for ExpandedKeypair

where ExpandedSecretKey: ConstantTimeEq, PublicKey: ConstantTimeEq,

fn ct_eq(&self, other: &ExpandedKeypair) -> Choice

Determine if two items are equal.

fn ct_ne(&self, other: &Self) -> Choice

Determine if two items are NOT equal.

impl Ed25519SigningKey for ExpandedKeypair

fn sign(&self, message: &[u8]) -> Signature

Sign a message with this key.

impl EncodableItem for ExpandedKeypair

fn as_keystore_item(&self) -> Result<KeystoreItem, Error>

Return the key as a KeystoreItem.

impl<'a> From<&'a Keypair> for ExpandedKeypair

fn from(kp: &'a Keypair) -> ExpandedKeypair

Converts to this type from the input type.

impl From<ExpandedKeypair> for HsBlindIdKeypair

fn from(value: ExpandedKeypair) -> HsBlindIdKeypair

Converts to this type from the input type.

impl From<ExpandedKeypair> for HsIdKeypair

fn from(value: ExpandedKeypair) -> HsIdKeypair

Converts to this type from the input type.

impl From<ExpandedKeypair> for PublicKey

fn from(ekp: ExpandedKeypair) -> PublicKey

Converts to this type from the input type.

impl From<HsBlindIdKeypair> for ExpandedKeypair

fn from(value: HsBlindIdKeypair) -> ExpandedKeypair

Converts to this type from the input type.

impl From<HsIdKeypair> for ExpandedKeypair

fn from(value: HsIdKeypair) -> ExpandedKeypair

Converts to this type from the input type.

impl ItemType for ExpandedKeypair

fn item_type() -> KeystoreItemType

where ExpandedKeypair: Sized,

The type of the key.

impl Keygen for ExpandedKeypair

fn generate(rng: &mut dyn KeygenRng) -> Result<ExpandedKeypair, Error>

where ExpandedKeypair: Sized,

Generate a new key of this type.