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fix: Fix handling of special cases in powmod

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This commit is contained in:
alivecow 2024-11-15 20:14:54 +01:00
parent 67bbf67f18
commit 7dc6fa1ac9
1 changed files with 38 additions and 0 deletions
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38
src/utils/field.rs
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@ -75,6 +75,18 @@ impl Polynomial {
polynomial_2_block(vec![0], "gcm").unwrap(),
)]);
if exponent == 1 {
return self;
}
if exponent == 0 {
Polynomial::new(vec![FieldElement::new(
polynomial_2_block(vec![1], "gcm").unwrap(),
)])
.div(&modulus)
.1;
}
//eprintln!("Initial result: {:?}", result);
while exponent > 0 {
//eprintln!("Current exponent: {:02X}", exponent);
@ -1008,4 +1020,30 @@ mod tests {
eprintln!("Result is: {:02X?}", result);
assert_eq!(result.to_c_array(), vec!["oNXl5P8xq2WpUTP92u25zg=="]);
}
#[test]
fn test_field_poly_powmod_k1() {
let json1 = json!(["JAAAAAAAAAAAAAAAAAAAAA==",]);
let json2 = json!(["KryptoanalyseAAAAAAAAA=="]);
let element1: Polynomial = Polynomial::from_c_array(&json1);
let modulus: Polynomial = Polynomial::from_c_array(&json2);
let result = element1.pow_mod(1, modulus);
eprintln!("Result is: {:02X?}", result);
assert_eq!(result.to_c_array(), vec!["JAAAAAAAAAAAAAAAAAAAAA=="]);
}
#[test]
fn test_field_poly_powmod_k0() {
let json1 = json!(["JAAAAAAAAAAAAAAAAAAAAA==",]);
let json2 = json!(["KryptoanalyseAAAAAAAAA=="]);
let element1: Polynomial = Polynomial::from_c_array(&json1);
let modulus: Polynomial = Polynomial::from_c_array(&json2);
let result = element1.pow_mod(0, modulus);
eprintln!("Result is: {:02X?}", result);
assert_eq!(result.to_c_array(), vec!["gAAAAAAAAAAAAAAAAAAAAA=="]);
}
}