feat: Add ddf algorithm

src/tasks/mod.rs

@@ -9,8 +9,9 @@ use tasks01::{
     gfmul::gfmul_task,
     pad_oracle::padding_oracle,
     pfmath::{
-        gfdiv, gfpoly_add, gfpoly_diff, gfpoly_divmod, gfpoly_factor_sff, gfpoly_gcd,
-        gfpoly_make_monic, gfpoly_mul, gfpoly_pow, gfpoly_powmod, gfpoly_sort, gfpoly_sqrt,
+        gfdiv, gfpoly_add, gfpoly_diff, gfpoly_divmod, gfpoly_factor_ddf, gfpoly_factor_sff,
+        gfpoly_gcd, gfpoly_make_monic, gfpoly_mul, gfpoly_pow, gfpoly_powmod, gfpoly_sort,
+        gfpoly_sqrt,
     },
     poly2block::poly2block,
     sea128::sea128,
@@ -163,6 +164,12 @@ pub fn task_deploy(testcase: &Testcase) -> Result<Value> {
 
             Ok(json)
         }
+        "gfpoly_factor_ddf" => {
+            let result = gfpoly_factor_ddf(args)?;
+            let json = json!({"factors" : result});
+
+            Ok(json)
+        }
 
         _ => Err(anyhow!(
             "Fatal. No compatible action found. Json data was {:?}. Arguments were; {:?}",

src/tasks/tasks01/pfmath.rs

@@ -1,11 +1,18 @@
+use std::usize;
+
 use anyhow::Result;
 use base64::{prelude::BASE64_STANDARD, Engine};
 use serde_json::Value;
 
-use crate::utils::{
-    field::FieldElement,
-    poly::{gcd, Polynomial},
-    sff::{sff, Factors},
+use crate::{
+    tasks,
+    utils::{
+        self,
+        dff::ddf,
+        field::FieldElement,
+        poly::{gcd, Polynomial},
+        sff::{sff, Factors},
+    },
 };
 
 pub fn gfpoly_add(args: &Value) -> Result<Polynomial> {
@@ -135,6 +142,23 @@ pub fn gfpoly_factor_sff(arsg: &Value) -> Result<Vec<(Factors)>> {
     Ok(result)
 }
 
+pub fn gfpoly_factor_ddf(arsg: &Value) -> Result<Vec<(utils::dff::Factors)>> {
+    let poly_f = Polynomial::from_c_array(&arsg["F"].clone());
+
+    let mut factors = ddf(poly_f);
+    factors.sort();
+    let mut result: Vec<utils::dff::Factors> = vec![];
+
+    for (factor, degree) in factors {
+        result.push(utils::dff::Factors {
+            factor: factor.to_c_array(),
+            degree: degree as u32,
+        });
+    }
+
+    Ok(result)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;