1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
use super::engine_error;
use crate::specification::engines::AbstractEngine;
use crate::specification::entities::{GlweCiphertextEntity, PlaintextVectorEntity};
engine_error! {
GlweCiphertextTrivialDecryptionError for GlweCiphertextTrivialDecryptionEngine @
}
/// A trait for engines trivially decrypting GLWE ciphertexts.
///
/// # Semantics
///
/// This [pure](super#operation-semantics) operation generates a plaintext vector containing the
/// trivial decryption of the `input` ciphertext.
///
/// # Formal Definition
///
/// see [here](../engines/trait.GlweCiphertextTrivialEncryptionEngine.html)
pub trait GlweCiphertextTrivialDecryptionEngine<Ciphertext, PlaintextVector>:
AbstractEngine
where
Ciphertext: GlweCiphertextEntity,
PlaintextVector: PlaintextVectorEntity,
{
/// Decrypts a GLWE ciphertext into a plaintext vector.
fn trivially_decrypt_glwe_ciphertext(
&mut self,
input: &Ciphertext,
) -> Result<PlaintextVector, GlweCiphertextTrivialDecryptionError<Self::EngineError>>;
/// Unsafely trivially decrypts a GLWE ciphertext into a plaintext vector.
///
/// # Safety
/// For the _general_ safety concerns regarding this operation, refer to the different variants
/// of [`GlweCiphertextTrivialDecryptionError`]. For safety concerns _specific_ to an engine,
/// refer to the implementer safety section.
unsafe fn trivially_decrypt_glwe_ciphertext_unchecked(
&mut self,
input: &Ciphertext,
) -> PlaintextVector;
}