Struct DecryptionKey

pub struct DecryptionKey { /* private fields */ }

An ElGamal decryption key (also called a private key in other implementations).

Implementations

impl DecryptionKey

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

Generate a new ElGamal decryption key using the randomness source rng, together with its corresponding encryption key.

Example

use rand::rngs::StdRng;
use rand::SeedableRng;
use rust_elgamal::DecryptionKey;

let mut rng = StdRng::from_entropy();
let dec_key = DecryptionKey::new(&mut rng);

pub fn decrypt(&self, ct: Ciphertext) -> RistrettoPoint

Decrypt the ciphertext ct.

Example

use rand::rngs::StdRng;
use rand::SeedableRng;
use rust_elgamal::{DecryptionKey, GENERATOR_TABLE, Scalar};

let mut rng = StdRng::from_entropy();
let dec_key = DecryptionKey::new(&mut rng);

let m = &Scalar::from(5u32) * &GENERATOR_TABLE;
let ct = dec_key.encryption_key().encrypt(m, &mut rng);
let decrypted = dec_key.decrypt(ct);
assert_eq!(m, decrypted);

pub fn encryption_key(&self) -> &EncryptionKey

Retrieve the encryption key corresponding to this decryption key.

Trait Implementations

impl AsRef<Scalar> for DecryptionKey

fn as_ref(&self) -> &Scalar

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

impl Clone for DecryptionKey

fn clone(&self) -> DecryptionKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DecryptionKey

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

Formats the value using the given formatter.

impl From<DecryptionKey> for EncryptionKey

fn from(dk: DecryptionKey) -> Self

Converts to this type from the input type.

impl From<Scalar> for DecryptionKey

fn from(secret: Scalar) -> Self

Converts to this type from the input type.

impl PartialEq for DecryptionKey

fn eq(&self, other: &DecryptionKey) -> 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 Copy for DecryptionKey

impl Eq for DecryptionKey

impl StructuralPartialEq for DecryptionKey