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use super::{read_from_file, write_to_file};
use concrete_core::crypto::GlweDimension;
use concrete_core::math::polynomial::PolynomialSize;
use concrete_core::math::random::RandomGenerator;
use concrete_core::{
crypto::secret::{GlweSecretKey, LweSecretKey},
math::tensor::IntoTensor,
};
use serde::{Deserialize, Serialize};
use std::error::Error;
use std::fmt;
#[derive(Debug, Serialize, Deserialize, PartialEq)]
pub struct RLWESecretKey {
pub val: GlweSecretKey<Vec<bool>>,
pub polynomial_size: usize,
pub dimension: usize,
pub std_dev: f64,
}
impl RLWESecretKey {
pub fn new(params: &crate::RLWEParams) -> RLWESecretKey {
let val = GlweSecretKey::generate(
GlweDimension(params.dimension),
PolynomialSize(params.polynomial_size),
&mut RandomGenerator::new(None),
);
RLWESecretKey {
val,
polynomial_size: params.polynomial_size,
dimension: params.dimension,
std_dev: params.get_std_dev(),
}
}
pub fn new_raw(polynomial_size: usize, dimension: usize, std_dev: f64) -> RLWESecretKey {
let val = GlweSecretKey::generate(
GlweDimension(dimension),
PolynomialSize(polynomial_size),
&mut RandomGenerator::new(None),
);
RLWESecretKey {
val,
polynomial_size,
dimension,
std_dev,
}
}
pub fn to_lwe_secret_key(&self) -> crate::LWESecretKey {
crate::LWESecretKey {
val: LweSecretKey::from_container(self.val.clone().into_tensor().into_container()),
dimension: self.dimension * self.polynomial_size,
std_dev: self.std_dev,
}
}
pub fn get_variance(&self) -> f64 {
f64::powi(self.std_dev, 2i32)
}
pub fn save(&self, path: &str) -> Result<(), Box<dyn Error>> {
write_to_file(path, self)
}
pub fn load(path: &str) -> Result<RLWESecretKey, Box<dyn Error>> {
read_from_file(path)
}
}
impl fmt::Display for RLWESecretKey {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut to_be_print: String = "".to_string();
to_be_print = to_be_print
+ &format!(
" RLWESecretKey {{\n -> dimension = {}\n -> polynomial_size = {}\n -> std_dev = {}\n",
self.dimension, self.polynomial_size, self.std_dev
);
to_be_print += " }";
writeln!(f, "{}", to_be_print)
}
}