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use concrete_commons::dispersion::Variance;
use crate::backends::core::implementation::engines::CoreEngine;
use crate::backends::core::implementation::entities::{
GlweCiphertext32, GlweCiphertext64, GlweSecretKey32, GlweSecretKey64, PlaintextVector32,
PlaintextVector64,
};
use crate::backends::core::private::crypto::glwe::GlweCiphertext as ImplGlweCiphertext;
use crate::specification::engines::{
GlweCiphertextEncryptionEngine, GlweCiphertextEncryptionError,
};
use crate::specification::entities::GlweSecretKeyEntity;
/// # Description:
/// Implementation of [`GlweCiphertextEncryptionEngine`] for [`CoreEngine`] that operates on 32 bits
/// integers.
impl GlweCiphertextEncryptionEngine<GlweSecretKey32, PlaintextVector32, GlweCiphertext32>
for CoreEngine
{
/// # Example:
/// ```
/// use concrete_commons::dispersion::Variance;
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::prelude::*;
/// # use std::error::Error;
///
/// # fn main() -> Result<(), Box<dyn Error>> {
/// // DISCLAIMER: the parameters used here are only for test purpose, and are not secure.
/// let glwe_dimension = GlweDimension(2);
/// let polynomial_size = PolynomialSize(4);
/// // There are always polynomial_size messages encrypted in the GLWE ciphertext
/// // Here a hard-set encoding is applied (shift by 20 bits)
/// let input = vec![3_u32 << 20; polynomial_size.0];
/// let noise = Variance(2_f64.powf(-25.));
///
/// let mut engine = CoreEngine::new()?;
/// let key: GlweSecretKey32 = engine.create_glwe_secret_key(glwe_dimension, polynomial_size)?;
/// let plaintext_vector = engine.create_plaintext_vector(&input)?;
///
/// let ciphertext = engine.encrypt_glwe_ciphertext(&key, &plaintext_vector, noise)?;
/// #
/// assert_eq!(ciphertext.glwe_dimension(), glwe_dimension);
/// assert_eq!(ciphertext.polynomial_size(), polynomial_size);
///
/// engine.destroy(key)?;
/// engine.destroy(plaintext_vector)?;
/// engine.destroy(ciphertext)?;
/// #
/// # Ok(())
/// # }
/// ```
fn encrypt_glwe_ciphertext(
&mut self,
key: &GlweSecretKey32,
input: &PlaintextVector32,
noise: Variance,
) -> Result<GlweCiphertext32, GlweCiphertextEncryptionError<Self::EngineError>> {
GlweCiphertextEncryptionError::perform_generic_checks(key, input)?;
Ok(unsafe { self.encrypt_glwe_ciphertext_unchecked(key, input, noise) })
}
unsafe fn encrypt_glwe_ciphertext_unchecked(
&mut self,
key: &GlweSecretKey32,
input: &PlaintextVector32,
noise: Variance,
) -> GlweCiphertext32 {
let mut ciphertext = ImplGlweCiphertext::allocate(
0u32,
key.polynomial_size(),
key.glwe_dimension().to_glwe_size(),
);
key.0.encrypt_glwe(
&mut ciphertext,
&input.0,
noise,
&mut self.encryption_generator,
);
GlweCiphertext32(ciphertext)
}
}
/// # Description:
/// Implementation of [`GlweCiphertextEncryptionEngine`] for [`CoreEngine`] that operates on 64 bits
/// integers.
impl GlweCiphertextEncryptionEngine<GlweSecretKey64, PlaintextVector64, GlweCiphertext64>
for CoreEngine
{
/// # Example:
/// ```
/// use concrete_commons::dispersion::Variance;
/// use concrete_commons::parameters::{GlweDimension, PolynomialSize};
/// use concrete_core::prelude::*;
/// # use std::error::Error;
///
/// # fn main() -> Result<(), Box<dyn Error>> {
/// // DISCLAIMER: the parameters used here are only for test purpose, and are not secure.
/// let glwe_dimension = GlweDimension(2);
/// let polynomial_size = PolynomialSize(4);
/// // There are always polynomial_size messages encrypted in the GLWE ciphertext
/// // Here a hard-set encoding is applied (shift by 50 bits)
/// let input = vec![3_u64 << 50; polynomial_size.0];
/// let noise = Variance(2_f64.powf(-25.));
///
/// let mut engine = CoreEngine::new()?;
/// let key: GlweSecretKey64 = engine.create_glwe_secret_key(glwe_dimension, polynomial_size)?;
/// let plaintext_vector = engine.create_plaintext_vector(&input)?;
///
/// let ciphertext = engine.encrypt_glwe_ciphertext(&key, &plaintext_vector, noise)?;
/// #
/// assert_eq!(ciphertext.glwe_dimension(), glwe_dimension);
/// assert_eq!(ciphertext.polynomial_size(), polynomial_size);
///
/// engine.destroy(key)?;
/// engine.destroy(plaintext_vector)?;
/// engine.destroy(ciphertext)?;
/// #
/// # Ok(())
/// # }
/// ```
fn encrypt_glwe_ciphertext(
&mut self,
key: &GlweSecretKey64,
input: &PlaintextVector64,
noise: Variance,
) -> Result<GlweCiphertext64, GlweCiphertextEncryptionError<Self::EngineError>> {
GlweCiphertextEncryptionError::perform_generic_checks(key, input)?;
Ok(unsafe { self.encrypt_glwe_ciphertext_unchecked(key, input, noise) })
}
unsafe fn encrypt_glwe_ciphertext_unchecked(
&mut self,
key: &GlweSecretKey64,
input: &PlaintextVector64,
noise: Variance,
) -> GlweCiphertext64 {
let mut ciphertext = ImplGlweCiphertext::allocate(
0u64,
key.polynomial_size(),
key.glwe_dimension().to_glwe_size(),
);
key.0.encrypt_glwe(
&mut ciphertext,
&input.0,
noise,
&mut self.encryption_generator,
);
GlweCiphertext64(ciphertext)
}
}