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feat: gfmul fix algorithm. test is passing.

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0xalivecow 2024-10-26 17:57:14 +02:00
parent 4dc6cdfef8
commit 7564869ea8
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2 changed files with 24 additions and 5 deletions
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5
src/tasks/tasks01/gfmul.rs
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@ -44,10 +44,13 @@ pub fn gfmul(args: &Value) -> Result<String> {
if poly2.LSB_is_one() { if poly2.LSB_is_one() {
result.xor_byte_arrays(&poly1); result.xor_byte_arrays(&poly1);
poly2.right_shift();
} else {
poly2.right_shift();
} }
while !poly2.is_empty() { while !poly2.is_empty() {
if !poly2.LSB_is_one() { if poly2.LSB_is_one() {
poly1.left_shift(); poly1.left_shift();
poly1.xor_byte_arrays(&red_poly_bytes); poly1.xor_byte_arrays(&red_poly_bytes);
eprintln!("Poly1 after reduction: {:01X?}", poly1); eprintln!("Poly1 after reduction: {:01X?}", poly1);

24
src/utils/math.rs
View file

@ -69,8 +69,8 @@ mod tests {
#[test] #[test]
fn test_byte_array_shift2() { fn test_byte_array_shift2() {
let mut byte_array: ByteArray = ByteArray(vec![0x00, 0xFF]); let mut byte_array: ByteArray = ByteArray(vec![0xFF, 0x00]);
let shifted_array: ByteArray = ByteArray(vec![0x01, 0xFE]); let shifted_array: ByteArray = ByteArray(vec![0xFE, 0x01]);
byte_array.left_shift(); byte_array.left_shift();
assert_eq!( assert_eq!(
@ -80,13 +80,29 @@ mod tests {
); );
} }
#[test]
fn test_byte_array_shift_right() {
let mut byte_array: ByteArray = ByteArray(vec![0x02]);
let shifted_array: ByteArray = ByteArray(vec![0x01]);
byte_array.right_shift();
assert_eq!(
byte_array.0, shifted_array.0,
"Failure: Shifted array was: {:?}",
byte_array.0
);
}
#[test] #[test]
fn test_lsb_one() { fn test_lsb_one() {
let mut byte_array: ByteArray = ByteArray(vec![0x00, 0xFF]); let mut byte_array: ByteArray = ByteArray(vec![0x00, 0xFF]);
assert!(byte_array.LSB_is_one()); assert!(!byte_array.LSB_is_one());
let mut byte_array2: ByteArray = ByteArray(vec![0x00, 0x02]); let mut byte_array2: ByteArray = ByteArray(vec![0x02, 0xFF]);
assert!(!byte_array2.LSB_is_one()); assert!(!byte_array2.LSB_is_one());
let mut byte_array3: ByteArray = ByteArray(vec![0xFF, 0x00]);
assert!(byte_array3.LSB_is_one());
} }
#[test] #[test]