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SDA lattice attack, need to fix LLL part

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This commit is contained in:
Sam Hadow
2025-04-04 10:15:20 +02:00
parent 1620037cd1
commit 6dc394c162
3 changed files with 73 additions and 9 deletions
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21
src/matrix.rs
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@@ -11,14 +11,14 @@ macro_rules! int {
#[derive(Debug, PartialEq)]
pub struct Matrix {
pub n: usize, //rows
pub n: usize, // rows
pub m: usize, // columns
values: Vec<Element>,
}
impl Matrix {
pub fn new(n: usize, m: usize, values: Vec<Element>) -> Option<Self> {
if n*m == values.len() {
if n * m == values.len() {
Some(Matrix { n, m, values })
} else {
None
@@ -29,8 +29,8 @@ impl Matrix {
let n = ciphertexts.len();
let mut values = Vec::with_capacity(n * n);
// First row: [2^noise_bits, ciphertexts[1], ..., ciphertexts[t]]
values.push(int!(2u64).pow(noise_bits as u32));
// First row: [2^(noise_bits+1), ciphertexts[1], ..., ciphertexts[t]]
values.push(int!(2u64).pow(noise_bits as u32 + 1));
values.extend_from_slice(&ciphertexts[1..]);
// -x0 on diagonal, 0 everywhere else
@@ -48,7 +48,7 @@ impl Matrix {
impl Index<(usize, usize)> for Matrix {
type Output = Element;
fn index(&self, index: (usize, usize)) -> &Self::Output {
if index.0>=self.m || index.1 >= self.n {
if index.0 >= self.m || index.1 >= self.n {
panic!();
}
&self.values[(self.n * index.0) + index.1]
@@ -57,7 +57,7 @@ impl Index<(usize, usize)> for Matrix {
impl IndexMut<(usize, usize)> for Matrix {
fn index_mut(&mut self, index: (usize, usize)) -> &mut Self::Output {
if index.0>=self.m || index.1 >= self.n {
if index.0 >= self.m || index.1 >= self.n {
panic!();
}
&mut self.values[(self.n * index.0) + index.1]
@@ -91,7 +91,12 @@ mod tests {
m[(1, 0)] = int!(5);
assert_eq!(m[(1, 0)], int!(5));
let m2 = Matrix::new(3, 2, vec![int!(1), int!(2), int!(3), int!(4), int!(5), int!(6)]).unwrap();
let m2 = Matrix::new(
3,
2,
vec![int!(1), int!(2), int!(3), int!(4), int!(5), int!(6)],
)
.unwrap();
assert_eq!(m2[(0, 2)], int!(3));
assert_eq!(m2[(1, 0)], int!(4));
let result = panic::catch_unwind(|| {
@@ -111,7 +116,7 @@ mod tests {
let noise_bits = 2;
let expected_values = vec![
int!(4),
int!(8),
int!(8),
int!(12),
int!(0),