Struct elastic_elgamal::SecretKey

pub struct SecretKey<G: Group>(_);

Secret key for ElGamal encryption and related protocols. This is a thin wrapper around the Group scalar.

Implementations

impl<G: Group> SecretKey<G>

pub fn decrypt_to_element(&self, encrypted: Ciphertext<G>) -> G::Element

Decrypts the provided ciphertext and returns the produced group element.

As the ciphertext does not include a MAC or another way to assert integrity, this operation cannot fail. If the ciphertext is not produced properly (e.g., it targets another receiver), the returned group element will be garbage.

pub fn decrypt(
    &self,
    encrypted: Ciphertext<G>,
    lookup_table: &DiscreteLogTable<G>
) -> Option<u64>

Decrypts the provided ciphertext and returns the original encrypted value.

lookup_table is used to find encrypted values based on the original decrypted group element. That is, it must contain all valid plaintext values. If the value is not in the table, this method will return None.

impl<G: Group> SecretKey<G>

pub fn generate<R: CryptoRng + RngCore>(rng: &mut R) -> Self

Generates a random secret key.

pub fn from_bytes(bytes: &[u8]) -> Option<Self>

Deserializes a secret key from bytes. If bytes do not represent a valid scalar, returns None.

pub fn expose_scalar(&self) -> &G::Scalar

Exposes the scalar equivalent to this key.

Trait Implementations

impl<G: Group> Add<SecretKey<G>> for SecretKey<G>

type Output = SecretKey<G>

The resulting type after applying the + operator.

fn add(self, rhs: Self) -> Self

Performs the + operation.

impl<G: Group> AddAssign<SecretKey<G>> for SecretKey<G>

fn add_assign(&mut self, rhs: Self)

Performs the += operation.

impl<G: Group> Clone for SecretKey<G>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<G: Group> Debug for SecretKey<G>

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

Formats the value using the given formatter.

impl<'de, G: Group> Deserialize<'de> for SecretKey<G>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where
    D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl<G: Group> Drop for SecretKey<G>

fn drop(&mut self)

Executes the destructor for this type.

impl<G: Group> From<&SecretKey<G>> for PublicKey<G>

fn from(secret_key: &SecretKey<G>) -> Self

Converts to this type from the input type.

impl<G: Group> From<SecretKey<G>> for Keypair<G>

fn from(secret: SecretKey<G>) -> Self

Converts to this type from the input type.

impl<G: Group> Mul<&<G as ScalarOps>::Scalar> for SecretKey<G>

type Output = SecretKey<G>

The resulting type after applying the * operator.

fn mul(self, k: &G::Scalar) -> Self

Performs the * operation.

impl<G: Group> Mul<&<G as ScalarOps>::Scalar> for &SecretKey<G>

type Output = SecretKey<G>

The resulting type after applying the * operator.

fn mul(self, k: &G::Scalar) -> SecretKey<G>

Performs the * operation.

impl<G: Group> Serialize for SecretKey<G>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<G: Group> Sub<SecretKey<G>> for SecretKey<G>

type Output = SecretKey<G>

The resulting type after applying the - operator.

fn sub(self, rhs: Self) -> Self

Performs the - operation.

impl<G: Group> SubAssign<SecretKey<G>> for SecretKey<G>

fn sub_assign(&mut self, rhs: Self)

Performs the -= operation.