Merge pull request #34 from 0xalivecow/dev

Merge refactoring changes

Cargo.toml

@@ -10,9 +10,17 @@ base64 = "0.22"
 openssl = "0.10"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+num = "0.4"
+rand = "0.8"
+threadpool = "1.8"
+num_cpus = "1.16.0"
 
 [source.crates-io]
 replace-with = "vendored-sources"
 
 [source.vendored-sources]
 directory = "vendor"
+
+[profile.profiling]
+inherits = "release"
+debug = true

src/main.rs

@@ -1,8 +1,10 @@
 use std::{
-    env::{self, args},
+    env::{self},
     fs,
 };
 
+// TESTING 2
+
 use anyhow::Result;
 
 fn main() -> Result<()> {
@@ -12,7 +14,7 @@ fn main() -> Result<()> {
     let json = fs::read_to_string(path_to_workload).unwrap();
     let workload = kauma::utils::parse::parse_json(json)?;
 
-    let response = kauma::tasks::task_distrubute(&workload)?;
+    let response = kauma::tasks::task_distribute(&workload)?;
     println!("{}", serde_json::to_string(&response)?);
 
     Ok(())

src/tasks/mod.rs

@@ -5,10 +5,18 @@ use std::collections::HashMap;
 use crate::utils::parse::{Responses, Testcase, Testcases};
 use tasks01::{
     block2poly::block2poly,
+    gcm::{gcm_decrypt, gcm_encrypt},
+    gcm_crack::gcm_crack,
     gfmul::gfmul_task,
+    pad_oracle::padding_oracle,
+    pfmath::{
+        gfdiv, gfpoly_add, gfpoly_diff, gfpoly_divmod, gfpoly_factor_ddf, gfpoly_factor_edf,
+        gfpoly_factor_sff, gfpoly_gcd, gfpoly_make_monic, gfpoly_mul, gfpoly_pow, gfpoly_powmod,
+        gfpoly_sort, gfpoly_sqrt,
+    },
     poly2block::poly2block,
     sea128::sea128,
-    xex::{self, fde_xex},
+    xex::fde_xex,
 };
 
 use anyhow::{anyhow, Result};
@@ -53,6 +61,129 @@ pub fn task_deploy(testcase: &Testcase) -> Result<Value> {
 
             Ok(json)
         }
+        "gcm_encrypt" => {
+            let (ciphertext, auth_tag, l_field, auth_key_h) = gcm_encrypt(args)?;
+            let out_ciph = BASE64_STANDARD.encode(&ciphertext);
+            let out_tag = BASE64_STANDARD.encode(&auth_tag);
+            let out_l = BASE64_STANDARD.encode(&l_field);
+            let out_h = BASE64_STANDARD.encode(&auth_key_h);
+
+            let json = json!({"ciphertext" : out_ciph, "tag" : out_tag, "L" : out_l, "H" : out_h});
+
+            Ok(json)
+        }
+        "gcm_decrypt" => {
+            let (plaintext, valid) = gcm_decrypt(args)?;
+            let out_plain = BASE64_STANDARD.encode(&plaintext);
+            let json = json!({ "authentic" : valid, "plaintext" : out_plain});
+
+            Ok(json)
+        }
+        "padding_oracle" => {
+            let plaintext = padding_oracle(args)?;
+            let out_plain = BASE64_STANDARD.encode(&plaintext);
+            let json = json!({"plaintext" : out_plain});
+
+            Ok(json)
+        }
+        "gfpoly_add" => {
+            let result = gfpoly_add(args)?;
+            let json = json!({"S" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_mul" => {
+            let result = gfpoly_mul(args)?;
+            let json = json!({"P" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_pow" => {
+            let result = gfpoly_pow(args)?;
+            let json = json!({"Z" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfdiv" => {
+            let result = gfdiv(args)?;
+            let out = result.to_b64();
+            let json = json!({"q" : out});
+
+            Ok(json)
+        }
+        "gfpoly_divmod" => {
+            let result = gfpoly_divmod(args)?;
+            let json = json!({"Q" : result.0.to_c_array(), "R" : result.1.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_powmod" => {
+            let result = gfpoly_powmod(args)?;
+            let json = json!({"Z" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_sort" => {
+            let sorted_array = gfpoly_sort(args)?;
+            let mut result: Vec<Vec<String>> = vec![];
+
+            for poly in sorted_array {
+                result.push(poly.to_c_array());
+            }
+
+            let json = json!({"sorted_polys" : json!(result)});
+
+            Ok(json)
+        }
+        "gfpoly_make_monic" => {
+            let result = gfpoly_make_monic(args)?;
+            let json = json!({"A*" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_sqrt" => {
+            let result = gfpoly_sqrt(args)?;
+            let json = json!({"S" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_diff" => {
+            let result = gfpoly_diff(args)?;
+            let json = json!({"F'" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_gcd" => {
+            let result = gfpoly_gcd(args)?;
+            let json = json!({"G" : result.to_c_array()});
+
+            Ok(json)
+        }
+        "gfpoly_factor_sff" => {
+            let result = gfpoly_factor_sff(args)?;
+            let json = json!({"factors" : result});
+
+            Ok(json)
+        }
+        "gfpoly_factor_ddf" => {
+            let result = gfpoly_factor_ddf(args)?;
+            let json = json!({"factors" : result});
+
+            Ok(json)
+        }
+        "gfpoly_factor_edf" => {
+            let result = gfpoly_factor_edf(args)?;
+            let json = json!({"factors" : result});
+
+            Ok(json)
+        }
+        "gcm_crack" => {
+            let result = gcm_crack(args)?;
+            let json = json!(result);
+
+            Ok(json)
+        }
+
         _ => Err(anyhow!(
             "Fatal. No compatible action found. Json data was {:?}. Arguments were; {:?}",
             testcase,
@@ -61,16 +192,60 @@ pub fn task_deploy(testcase: &Testcase) -> Result<Value> {
     }
 }
 
-pub fn task_distrubute(testcases: &Testcases) -> Result<Responses> {
+fn task_distribute_mt(testcases: &Testcases) -> Result<Responses> {
+    eprintln!("USING MULTITHREADED");
+    let mut responses: HashMap<String, Value> = HashMap::new();
+    let pool = threadpool::ThreadPool::default();
+    let (tx, rx) = std::sync::mpsc::channel();
+    for (key, testcase) in testcases.testcases.clone() {
+        let tx = tx.clone();
+        let testcase = testcase.clone();
+        pool.execute(move || {
+            tx.send((key, task_deploy(&testcase)))
+                .expect("could not send return value of thread to main thread")
+        });
+    }
+
+    for _ in 0..testcases.testcases.len() {
+        let result = match rx.recv_timeout(std::time::Duration::from_secs(60 * 5)) {
+            Ok(r) => r,
+            Err(e) => {
+                eprintln!("! Job timed out: {e}");
+                return Err(e.into());
+            }
+        };
+        match result.1 {
+            Ok(v) => {
+                let _ = responses.insert(result.0, v);
+            }
+            Err(e) => {
+                eprintln!("! failed to solve a challenge: {e:#}");
+                continue;
+            }
+        }
+    }
+
+    Ok(Responses { responses })
+}
+
+pub fn task_distribute_st(testcases: &Testcases) -> Result<Responses> {
+    //eprintln!("USING SINGLETHREADED");
     let mut responses: HashMap<String, Value> = HashMap::new();
 
     for (id, testcase) in &testcases.testcases {
         responses.insert(id.to_owned(), task_deploy(testcase).unwrap());
     }
 
-    Ok(Responses {
+    Ok(Responses { responses })
-        responses: responses,
+}
-    })
+
+pub fn task_distribute(testcases: &Testcases) -> Result<Responses> {
+    let cpus = num_cpus::get();
+    if cpus > 1 {
+        task_distribute_mt(testcases)
+    } else {
+        task_distribute_st(testcases)
+    }
 }
 
 #[cfg(test)]
@@ -103,7 +278,7 @@ mod tests {
         let expected = json!({ "responses": { "b856d760-023d-4b00-bad2-15d2b6da22fe": {"block": "ARIAAAAAAAAAAAAAAAAAgA=="}}});
 
         assert_eq!(
-            serde_json::to_value(task_distrubute(&parsed)?).unwrap(),
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
             serde_json::to_value(expected).unwrap()
         );
 
@@ -127,7 +302,7 @@ mod tests {
         });
 
         assert_eq!(
-            serde_json::to_value(task_distrubute(&parsed)?).unwrap(),
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
             serde_json::to_value(expected).unwrap()
         );
 
@@ -142,7 +317,7 @@ mod tests {
         let expected = json!({ "responses": { "b856d760-023d-4b00-bad2-15d2b6da22fe": {"product": "hSQAAAAAAAAAAAAAAAAAAA=="}}});
 
         assert_eq!(
-            serde_json::to_value(task_distrubute(&parsed)?).unwrap(),
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
             serde_json::to_value(expected).unwrap()
         );
 
@@ -160,7 +335,101 @@ mod tests {
         }});
 
         assert_eq!(
-            serde_json::to_value(task_distrubute(&parsed)?).unwrap(),
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
+            serde_json::to_value(expected).unwrap()
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_task_gcm_encrypt_aes_case() -> Result<()> {
+        let json = fs::read_to_string("test_json/gcm_encrypt.json").unwrap();
+        let parsed = parse_json(json).unwrap();
+
+        let expected = json!({ "responses" : { "b856d760-023d-4b00-bad2-15d2b6da22fe" : {
+        "ciphertext": "ET3RmvH/Hbuxba63EuPRrw==",
+        "tag": "Mp0APJb/ZIURRwQlMgNN/w==",
+        "L": "AAAAAAAAAEAAAAAAAAAAgA==",
+        "H": "Bu6ywbsUKlpmZXMQyuGAng=="
+        }}});
+
+        assert_eq!(
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
+            serde_json::to_value(expected).unwrap()
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_task_gcm_encrypt_sea_case() -> Result<()> {
+        let json = fs::read_to_string("test_json/gcm_encrypt_sea.json").unwrap();
+        let parsed = parse_json(json).unwrap();
+
+        let expected = json!({ "responses" : { "b856d760-023d-4b00-bad2-15d2b6da22fe" : {
+        "ciphertext": "0cI/Wg4R3URfrVFZ0hw/vg==",
+        "tag": "ysDdzOSnqLH0MQ+Mkb23gw==",
+        "L": "AAAAAAAAAEAAAAAAAAAAgA==",
+        "H": "xhFcAUT66qWIpYz+Ch5ujw=="
+        }}});
+
+        assert_eq!(
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
+            serde_json::to_value(expected).unwrap()
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_task_gcm_decrypt_aes_case() -> Result<()> {
+        let json = fs::read_to_string("test_json/gcm_decrypt_aes.json").unwrap();
+        let parsed = parse_json(json).unwrap();
+
+        let expected = json!({ "responses" : { "b856d760-023d-4b00-bad2-15d2b6da22fe" : {
+        "plaintext": "RGFzIGlzdCBlaW4gVGVzdA==",
+        "authentic": true,
+        }}});
+
+        assert_eq!(
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
+            serde_json::to_value(expected).unwrap()
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_task_gcm_decrypt_sea_case() -> Result<()> {
+        let json = fs::read_to_string("test_json/gcm_decrypt_sea.json").unwrap();
+        let parsed = parse_json(json).unwrap();
+
+        let expected = json!({ "responses" : { "b856d760-023d-4b00-bad2-15d2b6da22fe" : {
+        "plaintext": "RGFzIGlzdCBlaW4gVGVzdA==",
+        "authentic": true,
+        }}});
+
+        assert_eq!(
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
+            serde_json::to_value(expected).unwrap()
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_task_gcm_gfpoly_add() -> Result<()> {
+        let json = fs::read_to_string("test_json/gcm_decrypt_sea.json").unwrap();
+        let parsed = parse_json(json).unwrap();
+
+        let expected = json!({ "responses" : { "b856d760-023d-4b00-bad2-15d2b6da22fe" : {
+        "plaintext": "RGFzIGlzdCBlaW4gVGVzdA==",
+        "authentic": true,
+        }}});
+
+        assert_eq!(
+            serde_json::to_value(task_distribute(&parsed)?).unwrap(),
             serde_json::to_value(expected).unwrap()
         );
 

src/tasks/tasks01/block2poly.rs

@@ -1,4 +1,4 @@
-use crate::utils::poly::{b64_2_num, block_2_polynomial, get_coefficients};
+use crate::utils::poly::block_2_polynomial;
 use anyhow::Result;
 use base64::prelude::*;
 use serde_json::Value;
@@ -19,7 +19,6 @@ pub fn block2poly(val: &Value) -> Result<Vec<u8>> {
 #[cfg(test)]
 mod tests {
     use serde_json::json;
-    use std::str::FromStr;
 
     // Note this useful idiom: importing names from outer (for mod tests) scope.
     use super::*;

src/tasks/tasks01/gcm.rs

@@ -0,0 +1,52 @@
+use anyhow::{anyhow, Result};
+use base64::prelude::*;
+use serde_json::Value;
+
+use crate::utils::ciphers::{gcm_decrypt_aes, gcm_decrypt_sea, gcm_encrypt_aes, gcm_encrypt_sea};
+
+pub fn gcm_encrypt(args: &Value) -> Result<(Vec<u8>, Vec<u8>, Vec<u8>, Vec<u8>)> {
+    let nonce_text: String = serde_json::from_value(args["nonce"].clone())?;
+    let nonce = BASE64_STANDARD.decode(nonce_text)?;
+
+    let key_text: String = serde_json::from_value(args["key"].clone())?;
+    let key = BASE64_STANDARD.decode(key_text)?;
+
+    let plaintext_text: String = serde_json::from_value(args["plaintext"].clone())?;
+    let plaintext = BASE64_STANDARD.decode(plaintext_text)?;
+
+    let ad_text: String = serde_json::from_value(args["ad"].clone())?;
+    let ad = BASE64_STANDARD.decode(ad_text)?;
+
+    let alg_text: String = serde_json::from_value(args["algorithm"].clone())?;
+
+    match alg_text.as_str() {
+        "aes128" => Ok(gcm_encrypt_aes(nonce, key, plaintext, ad)?),
+        "sea128" => Ok(gcm_encrypt_sea(nonce, key, plaintext, ad)?),
+        _ => Err(anyhow!("No compatible algorithm found")),
+    }
+}
+
+pub fn gcm_decrypt(args: &Value) -> Result<(Vec<u8>, bool)> {
+    let nonce_text: String = serde_json::from_value(args["nonce"].clone())?;
+    let nonce = BASE64_STANDARD.decode(nonce_text)?;
+
+    let key_text: String = serde_json::from_value(args["key"].clone())?;
+    let key = BASE64_STANDARD.decode(key_text)?;
+
+    let plaintext_text: String = serde_json::from_value(args["ciphertext"].clone())?;
+    let plaintext = BASE64_STANDARD.decode(plaintext_text)?;
+
+    let ad_text: String = serde_json::from_value(args["ad"].clone())?;
+    let ad = BASE64_STANDARD.decode(ad_text)?;
+
+    let tag_text: String = serde_json::from_value(args["tag"].clone())?;
+    let tag = BASE64_STANDARD.decode(tag_text)?;
+
+    let alg_text: String = serde_json::from_value(args["algorithm"].clone())?;
+
+    match alg_text.as_str() {
+        "aes128" => Ok(gcm_decrypt_aes(nonce, key, plaintext, ad, tag)?),
+        "sea128" => Ok(gcm_decrypt_sea(nonce, key, plaintext, ad, tag)?),
+        _ => Err(anyhow!("No compatible algorithm found")),
+    }
+}

src/tasks/tasks01/gcm_crack.rs

@@ -0,0 +1,174 @@
+
+use anyhow::{Ok, Result};
+use base64::{prelude::BASE64_STANDARD, Engine};
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+
+use crate::utils::{
+    ciphers::ghash,
+    dff::ddf,
+    edf::edf,
+    field::FieldElement,
+    math::{reverse_bits_in_bytevec, xor_bytes},
+    poly::Polynomial,
+    sff::sff,
+};
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct CrackAnswer {
+    tag: String,
+    H: String,
+    mask: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+struct Message {
+    ciphertext: Vec<u8>,
+    ad: Vec<u8>,
+    tag: Vec<u8>,
+    l_field: Vec<u8>,
+}
+
+fn parse_message(val: &Value) -> Result<(Message, Polynomial)> {
+    let ciphertext_text: String = serde_json::from_value(val["ciphertext"].clone())?;
+    let mut ciphertext_bytes: Vec<u8> = BASE64_STANDARD.decode(ciphertext_text)?;
+    let mut c_len: Vec<u8> = ((ciphertext_bytes.len() * 8) as u64).to_be_bytes().to_vec();
+
+    if ciphertext_bytes.len() % 16 != 0 {
+        ciphertext_bytes.append(vec![0u8; 16 - (ciphertext_bytes.len() % 16)].as_mut());
+    }
+
+    let ciphertext_chunks: Vec<FieldElement> = ciphertext_bytes
+        .chunks(16)
+        .into_iter()
+        .map(|chunk| FieldElement::new(chunk.to_vec()))
+        .collect();
+
+    let ad_text: String = serde_json::from_value(val["associated_data"].clone())?;
+    let mut ad_bytes: Vec<u8> = BASE64_STANDARD.decode(ad_text)?;
+    let mut l_field: Vec<u8> = ((ad_bytes.len() * 8) as u64).to_be_bytes().to_vec();
+
+    if ad_bytes.len() % 16 != 0 || ad_bytes.is_empty() {
+        ad_bytes.append(vec![0u8; 16 - (ad_bytes.len() % 16)].as_mut());
+    }
+
+    let ad_chunks: Vec<FieldElement> = ad_bytes
+        .chunks(16)
+        .into_iter()
+        .map(|chunk| FieldElement::new(chunk.to_vec()))
+        .collect();
+
+    let tag_text: String = serde_json::from_value(val["tag"].clone()).unwrap_or("".to_string());
+    let tag_bytes: Vec<u8> = BASE64_STANDARD.decode(tag_text)?;
+    let tag_field: FieldElement = FieldElement::new(tag_bytes.clone());
+
+    l_field.append(c_len.as_mut());
+
+    // Combine all data
+    let mut combined: Vec<FieldElement> =
+        Vec::with_capacity(ad_chunks.len() + ciphertext_chunks.len() + 1);
+    combined.extend(ad_chunks);
+    combined.extend(ciphertext_chunks.clone());
+    combined.push(FieldElement::new(l_field.clone()));
+    combined.push(tag_field);
+
+    combined.reverse();
+
+    let h_poly: Polynomial = Polynomial::new(combined);
+
+    Ok((
+        Message {
+            ciphertext: ciphertext_bytes,
+            ad: ad_bytes,
+            tag: tag_bytes,
+            l_field,
+        },
+        h_poly,
+    ))
+}
+
+pub fn gcm_crack(args: &Value) -> Result<CrackAnswer> {
+    // Prepare first equation
+    let (m1_data, m1_h_poly) = parse_message(&args["m1"])?;
+
+    let (_, m2_h_poly) = parse_message(&args["m2"])?;
+
+    let (m3_data, _) = parse_message(&args["m3"])?;
+
+    let combine_poly = m1_h_poly + m2_h_poly;
+
+    let combine_sff = sff(combine_poly.monic());
+
+    let mut combine_ddf: Vec<(Polynomial, u128)> = vec![];
+    for (factor, _) in combine_sff {
+        combine_ddf.extend(ddf(factor));
+    }
+
+    let mut combine_edf: Vec<Polynomial> = vec![];
+    for (factor, degree) in combine_ddf {
+        if degree == 1 {
+            combine_edf.extend(edf(factor, degree as u32));
+        }
+    }
+
+    let mut m3_auth_tag: Vec<u8> = vec![];
+    let mut h_candidate: FieldElement = FieldElement::zero();
+    let mut eky0: Vec<u8> = vec![];
+    for candidate in combine_edf {
+        if candidate.degree() == 1 {
+            h_candidate = candidate.extract_component(0);
+            let m1_ghash = ghash(
+                reverse_bits_in_bytevec(h_candidate.to_vec()),
+                m1_data.ad.clone(),
+                m1_data.ciphertext.clone(),
+                m1_data.l_field.clone(),
+            )
+            .unwrap();
+
+            eky0 = xor_bytes(&m1_data.tag, m1_ghash).unwrap();
+            eprintln!("eky0: {:?}", BASE64_STANDARD.encode(eky0.clone()));
+
+            let m3_ghash = ghash(
+                reverse_bits_in_bytevec(h_candidate.to_vec()),
+                m3_data.ad.clone(),
+                m3_data.ciphertext.clone(),
+                m3_data.l_field.clone(),
+            )
+            .unwrap();
+
+            m3_auth_tag = xor_bytes(&eky0, m3_ghash).unwrap();
+            eprintln!(
+                "M3 auth tag: {:02X?}",
+                BASE64_STANDARD.encode(m3_auth_tag.clone())
+            );
+
+            if m3_auth_tag == m3_data.tag {
+                break;
+            } else {
+                eprintln!("H candidate not valid");
+            }
+        }
+    }
+
+    let (forgery_data, _) = parse_message(&args["forgery"])?;
+
+    let forgery_ghash = ghash(
+        reverse_bits_in_bytevec(h_candidate.to_vec()),
+        forgery_data.ad.clone(),
+        forgery_data.ciphertext.clone(),
+        forgery_data.l_field.clone(),
+    )
+    .unwrap();
+
+    let forgery_auth_tag = xor_bytes(&eky0, forgery_ghash).unwrap();
+
+    if eky0.is_empty() {
+        eky0 = vec![0; 16];
+    }
+
+    Ok(CrackAnswer {
+        tag: BASE64_STANDARD.encode(forgery_auth_tag),
+        H: h_candidate.to_b64(),
+        mask: BASE64_STANDARD.encode(eky0),
+    })
+}

src/tasks/tasks01/gfmul.rs

@@ -1,7 +1,4 @@
-use crate::utils::{
+use crate::utils::poly::gfmul;
-    field::ByteArray,
-    poly::{b64_2_num, coefficient_to_binary, gfmul},
-};
 
 use anyhow::Result;
 use base64::prelude::*;
@@ -16,7 +13,7 @@ pub fn gfmul_task(args: &Value) -> Result<Vec<u8>> {
 
     let semantic: String = serde_json::from_value(args["semantic"].clone())?;
 
-    let result = gfmul(poly_a, poly_b, &semantic)?;
+    let result = gfmul(&poly_a, &poly_b, &semantic)?;
 
     Ok(result)
 }
@@ -24,7 +21,6 @@ pub fn gfmul_task(args: &Value) -> Result<Vec<u8>> {
 #[cfg(test)]
 mod tests {
     use serde_json::json;
-    use std::str::FromStr;
 
     // Note this useful idiom: importing names from outer (for mod tests) scope.
     use super::*;
@@ -39,7 +35,7 @@ mod tests {
         let poly2_text: String = serde_json::from_value(args["b"].clone())?;
         let poly_b = BASE64_STANDARD.decode(poly2_text)?;
 
-        let result = BASE64_STANDARD.encode(gfmul(poly_a, poly_b, "xex")?);
+        let result = BASE64_STANDARD.encode(gfmul(&poly_a, &poly_b, "xex")?);
 
         assert_eq!(
             result, "hSQAAAAAAAAAAAAAAAAAAA==",
@@ -59,7 +55,7 @@ mod tests {
         let poly2_text: String = serde_json::from_value(args["b"].clone())?;
         let poly_b = BASE64_STANDARD.decode(poly2_text)?;
 
-        let result = BASE64_STANDARD.encode(gfmul(poly_a, poly_b, "xex")?);
+        let result = BASE64_STANDARD.encode(gfmul(&poly_a, &poly_b, "xex")?);
 
         assert_eq!(
             result, "QKgUAAAAAAAAAAAAAAAAAA==",
@@ -79,7 +75,7 @@ mod tests {
         let poly2_text: String = serde_json::from_value(args["b"].clone())?;
         let poly_b = BASE64_STANDARD.decode(poly2_text)?;
 
-        let result = BASE64_STANDARD.encode(gfmul(poly_a, poly_b, "xex")?);
+        let result = BASE64_STANDARD.encode(gfmul(&poly_a, &poly_b, "xex")?);
 
         assert_eq!(
             result, "UIAUAAAAAAAAAAAAAAAAAA==",
@@ -99,7 +95,7 @@ mod tests {
         let poly2_text: String = serde_json::from_value(args["b"].clone())?;
         let poly_b = BASE64_STANDARD.decode(poly2_text)?;
 
-        let result = BASE64_STANDARD.encode(gfmul(poly_a, poly_b, "xex")?);
+        let result = BASE64_STANDARD.encode(gfmul(&poly_a, &poly_b, "xex")?);
 
         assert_eq!(
             result, "hSQAAAAAAAAAAAAAAAAAAA==",

src/tasks/tasks01/mod.rs

@@ -1,5 +1,9 @@
 pub mod block2poly;
+pub mod gcm;
+pub mod gcm_crack;
 pub mod gfmul;
+pub mod pad_oracle;
+pub mod pfmath;
 pub mod poly2block;
 pub mod sea128;
 pub mod xex;

src/tasks/tasks01/pad_oracle.rs

@@ -0,0 +1,148 @@
+use anyhow::Result;
+use base64::prelude::*;
+use serde_json::Value;
+use std::io::prelude::*;
+use std::net::TcpStream;
+use std::usize;
+
+pub fn padding_oracle(args: &Value) -> Result<Vec<u8>> {
+    let hostname: String = serde_json::from_value(args["hostname"].clone())?;
+
+    let port_val: Value = serde_json::from_value(args["port"].clone())?;
+    let port: u64 = port_val.as_u64().expect("Failure in parsing port number");
+
+    let iv_string: String = serde_json::from_value(args["iv"].clone())?;
+    let iv: Vec<u8> = BASE64_STANDARD.decode(iv_string)?;
+
+    let cipher_text: String = serde_json::from_value(args["ciphertext"].clone())?;
+    let ciphertext: Vec<u8> = BASE64_STANDARD.decode(cipher_text)?;
+
+    // Initialise tracker to adapt correct byte
+    let byte_counter = 15;
+    eprintln!("byte_counter is: {}", byte_counter);
+
+    let mut plaintext: Vec<u8> = vec![];
+    eprintln!("Ciphertext: {:002X?}", ciphertext);
+
+    let cipher_chunks: Vec<&[u8]> = ciphertext.chunks(16).rev().collect();
+    let mut chunk_counter = 0;
+
+    for chunk in &cipher_chunks {
+        let mut stream = TcpStream::connect(format!("{}:{}", hostname, port))?;
+        stream.set_nodelay(true).expect("Error on no delay");
+        stream.set_nonblocking(false)?;
+
+        // Track value sent to server
+        let mut attack_counter: Vec<u8> = vec![0; 16];
+
+        // Amount of q blocks to send to server.
+        // TODO:: May be increased via function
+        let q_block_count: u16 = 256;
+
+        //Send the first ciphertext chunk
+        stream.flush()?;
+        stream.write_all(&chunk)?;
+        stream.flush()?;
+
+        for i in (0..=15).rev() {
+            // Craft length message
+            // FIXME: Assignment is redundant for now
+            // TODO: Goal is to maybe add speed increase in the future
+            let l_msg: [u8; 2] = q_block_count.to_le_bytes();
+
+            // Generate attack blocks
+            //  TODO: Collect all and send in one
+            let mut payload: Vec<u8> = Vec::with_capacity(2 + 16 * 265);
+            payload.extend(l_msg.to_vec());
+            for _j in 0..q_block_count {
+                // Next byte
+                payload.extend(&attack_counter);
+                attack_counter[i as usize] += 1;
+            }
+
+            stream.write_all(&payload)?;
+            stream.flush()?;
+
+            // Read server response
+            let mut server_q_resp = [0u8; 256];
+            stream.read_exact(&mut server_q_resp)?;
+
+            // extract valid position
+            let valid_val = server_q_resp
+                .iter()
+                .position(|&r| r == 0x01)
+                .unwrap_or(0x00) as u8;
+            if valid_val == 0x00 {
+                eprintln!("No valid found in main loop");
+            }
+            // Craft next attack vector padding; 0x01, 0x02, ...
+            attack_counter[i as usize] = valid_val;
+
+            // Check for edgecase
+            if i == 15 {
+                let mut l_msg_check: Vec<u8> = vec![0x01, 0x00];
+                let mut check_q_block: Vec<u8> = vec![0; 16];
+                check_q_block[15] = attack_counter[15];
+                check_q_block[14] = !check_q_block[15];
+
+                l_msg_check.extend(check_q_block.as_slice());
+
+                stream.write_all(&l_msg_check)?;
+                let mut buf = [0u8; 0x01];
+                stream.read(&mut buf)?;
+                if buf == [0x01] {
+                } else {
+                    // Search for second hit
+                    let valid_val = 255
+                        - server_q_resp
+                            .iter()
+                            .rev()
+                            .position(|&r| r == 0x01)
+                            .unwrap_or(0x00) as u8;
+                    if valid_val == 0x00 {
+                        eprintln!("No valid found");
+                    }
+                    // Craft next attack vector padding; 0x01, 0x02, ...
+                    attack_counter[i as usize] = valid_val;
+                }
+            }
+
+            if chunk_counter + 1 < cipher_chunks.len() {
+                plaintext.push(
+                    cipher_chunks[chunk_counter + 1][i]
+                        ^ (attack_counter[i as usize] ^ (15 - i as u8 + 1)),
+                );
+            } else {
+                plaintext.push(iv[i] ^ (attack_counter[i as usize] ^ (15 - i as u8 + 1)));
+            }
+            let range = i;
+            for pos in range..=15 {
+                let intermediate = attack_counter[pos as usize] ^ (15 - i as u8 + 1);
+
+                attack_counter[pos as usize] = intermediate ^ ((15 - i as u8 + 1) + 1);
+            }
+
+            stream.flush()?;
+
+            // Write plaintext
+        }
+        chunk_counter += 1;
+        stream.flush()?;
+        drop(stream);
+    }
+
+    plaintext.reverse();
+
+    eprintln!("{:02X?}", BASE64_STANDARD.encode(&plaintext));
+    Ok(plaintext)
+} // the stream is closed here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_connection() -> Result<()> {
+        Ok(())
+    }
+}

src/tasks/tasks01/pfmath.rs

@@ -0,0 +1,282 @@
+
+use anyhow::Result;
+use base64::{prelude::BASE64_STANDARD, Engine};
+use serde_json::Value;
+
+use crate::utils::{
+        self,
+        dff::ddf,
+        edf::edf,
+        field::FieldElement,
+        poly::{gcd, Polynomial},
+        sff::{sff, Factors},
+    };
+
+pub fn gfpoly_add(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+
+    let poly_b = Polynomial::from_c_array(&args["B"].clone());
+
+    let result = poly_a + poly_b;
+
+    Ok(result)
+}
+
+pub fn gfpoly_mul(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+
+    let poly_b = Polynomial::from_c_array(&args["B"].clone());
+
+    let result = poly_a * poly_b;
+
+    Ok(result)
+}
+
+pub fn gfpoly_pow(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+
+    let k: u128 = serde_json::from_value(args["k"].clone())?;
+
+    let result = poly_a.pow(k);
+
+    Ok(result)
+}
+
+pub fn gfdiv(args: &Value) -> Result<FieldElement> {
+    let f1_text: String = serde_json::from_value(args["a"].clone())?;
+    let f_a = FieldElement::new(BASE64_STANDARD.decode(f1_text)?);
+
+    let f2_text: String = serde_json::from_value(args["b"].clone())?;
+    let f_b = FieldElement::new(BASE64_STANDARD.decode(f2_text)?);
+
+    let result = f_a / f_b;
+
+    Ok(result)
+}
+
+pub fn gfpoly_divmod(args: &Value) -> Result<(Polynomial, Polynomial)> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+
+    let poly_b = Polynomial::from_c_array(&args["B"].clone());
+
+    let result = poly_a.div(&poly_b);
+
+    Ok(result)
+}
+
+pub fn gfpoly_powmod(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+
+    let poly_m = Polynomial::from_c_array(&args["M"].clone());
+
+    let k: u128 = serde_json::from_value(args["k"].clone())?;
+
+    let result = poly_a.pow_mod(k, poly_m);
+
+    Ok(result)
+}
+
+pub fn gfpoly_sort(args: &Value) -> Result<Vec<Polynomial>> {
+    let poly_arrays: Vec<Value> = serde_json::from_value(args["polys"].clone())?;
+    let mut polys: Vec<Polynomial> = vec![];
+
+    for array in poly_arrays {
+        polys.push(Polynomial::from_c_array(&array));
+    }
+
+    polys.sort();
+    //polys.sort();
+    Ok(polys)
+}
+
+pub fn gfpoly_make_monic(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+
+    let result = poly_a.monic();
+
+    Ok(result)
+}
+
+pub fn gfpoly_sqrt(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["Q"].clone());
+
+    let result = poly_a.sqrt();
+
+    Ok(result)
+}
+
+pub fn gfpoly_diff(args: &Value) -> Result<Polynomial> {
+    let poly_f = Polynomial::from_c_array(&args["F"].clone());
+
+    let result = poly_f.diff();
+
+    Ok(result)
+}
+
+pub fn gfpoly_gcd(args: &Value) -> Result<Polynomial> {
+    let poly_a = Polynomial::from_c_array(&args["A"].clone());
+    let poly_b = Polynomial::from_c_array(&args["B"].clone());
+
+    let result = gcd(&poly_a.monic(), &poly_b.monic());
+
+    Ok(result)
+}
+
+pub fn gfpoly_factor_sff(arsg: &Value) -> Result<Vec<Factors>> {
+    let poly_f = Polynomial::from_c_array(&arsg["F"].clone());
+
+    let mut factors = sff(poly_f);
+    factors.sort();
+    let mut result: Vec<Factors> = vec![];
+
+    for (factor, exponent) in factors {
+        result.push(Factors {
+            factor: factor.to_c_array(),
+            exponent,
+        });
+    }
+
+    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)
+}
+
+pub fn gfpoly_factor_edf(arsg: &Value) -> Result<Vec<Vec<String>>> {
+    let poly_f = Polynomial::from_c_array(&arsg["F"].clone());
+    let d: u32 = serde_json::from_value(arsg["d"].clone())?;
+
+    let mut factors = edf(poly_f, d);
+
+    factors.sort();
+
+    let mut result: Vec<Vec<String>> = vec![];
+
+    for factor in factors {
+        result.push(factor.to_c_array())
+    }
+
+    Ok(result)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use serde_json::json;
+
+    #[test]
+    fn test_poly_sorting() {
+        let json1 = json!(
+            {"polys": [
+            [
+                "NeverGonnaGiveYouUpAAA==",
+                "NeverGonnaLetYouDownAA==",
+                "NeverGonnaRunAroundAAA==",
+                "AndDesertYouAAAAAAAAAA=="
+            ],
+            [
+                "WereNoStrangersToLoveA==",
+                "YouKnowTheRulesAAAAAAA==",
+                "AndSoDoIAAAAAAAAAAAAAA=="
+            ],
+            [
+                "NeverGonnaMakeYouCryAA==",
+                "NeverGonnaSayGoodbyeAA==",
+                "NeverGonnaTellALieAAAA==",
+                "AndHurtYouAAAAAAAAAAAA=="
+            ]
+        ]});
+
+        let expected = json!([
+            [
+                "WereNoStrangersToLoveA==",
+                "YouKnowTheRulesAAAAAAA==",
+                "AndSoDoIAAAAAAAAAAAAAA=="
+            ],
+            [
+                "NeverGonnaMakeYouCryAA==",
+                "NeverGonnaSayGoodbyeAA==",
+                "NeverGonnaTellALieAAAA==",
+                "AndHurtYouAAAAAAAAAAAA=="
+            ],
+            [
+                "NeverGonnaGiveYouUpAAA==",
+                "NeverGonnaLetYouDownAA==",
+                "NeverGonnaRunAroundAAA==",
+                "AndDesertYouAAAAAAAAAA=="
+            ]
+        ]);
+
+        let sorted_array = gfpoly_sort(&json1).unwrap();
+        let mut result: Vec<Vec<String>> = vec![];
+        for poly in sorted_array {
+            result.push(poly.to_c_array());
+        }
+
+        assert_eq!(json!(result), expected);
+        //assert_eq!(BASE64_STANDARD.encode(product), "MoAAAAAAAAAAAAAAAAAAAA==");
+    }
+
+    #[test]
+    fn test_poly_sorting_02() {
+        let json1 = json!(
+            {"polys": [
+            [
+            "AQAAAAAAAAAAAAAAAAAAAA==",  // 0x01
+            "AgAAAAAAAAAAAAAAAAAAAA==",  // 0x02 
+            "AwAAAAAAAAAAAAAAAAAAAA=="   // 0x03
+            ],
+            [
+            "AQAAAAAAAAAAAAAAAAAAAA==",  // 0x01
+            "AgAAAAAAAAAAAAAAAAAAAA==",  // 0x02
+            "BAAAAAAAAAAAAAAAAAAAAA=="   // 0x04
+            ],
+            [
+            "AQAAAAAAAAAAAAAAAAAAAA==",  // 0x01
+            "AgAAAAAAAAAAAAAAAAAAAA=="   // 0x02
+            ],
+            [
+            "AQAAAAAAAAAAAAAAAAAAAA==",  // 0x01
+            "AwAAAAAAAAAAAAAAAAAAAA=="   // 0x03
+            ]
+        ],});
+
+        let expected = json!([
+            ["AQAAAAAAAAAAAAAAAAAAAA==", "AgAAAAAAAAAAAAAAAAAAAA=="],
+            ["AQAAAAAAAAAAAAAAAAAAAA==", "AwAAAAAAAAAAAAAAAAAAAA=="],
+            [
+                "AQAAAAAAAAAAAAAAAAAAAA==",
+                "AgAAAAAAAAAAAAAAAAAAAA==",
+                "BAAAAAAAAAAAAAAAAAAAAA=="
+            ],
+            [
+                "AQAAAAAAAAAAAAAAAAAAAA==",
+                "AgAAAAAAAAAAAAAAAAAAAA==",
+                "AwAAAAAAAAAAAAAAAAAAAA=="
+            ]
+        ]);
+
+        let sorted_array = gfpoly_sort(&json1).unwrap();
+        let mut result: Vec<Vec<String>> = vec![];
+        for poly in sorted_array {
+            result.push(poly.to_c_array());
+        }
+
+        assert_eq!(json!(result), expected);
+        //assert_eq!(BASE64_STANDARD.encode(product), "MoAAAAAAAAAAAAAAAAAAAA==");
+    }
+}

src/tasks/tasks01/poly2block.rs

@@ -1,6 +1,5 @@
-use crate::utils::poly::{self, polynomial_2_block};
+use crate::utils::poly::polynomial_2_block;
 use anyhow::{Ok, Result};
-use base64::prelude::*;
 use serde_json::Value;
 
 pub fn poly2block(args: &Value) -> Result<Vec<u8>> {

src/tasks/tasks01/sea128.rs

@@ -6,19 +6,13 @@ use crate::utils::ciphers::{sea_128_decrypt, sea_128_encrypt};
 
 pub fn sea128(args: &Value) -> Result<String> {
     let key_string: String = serde_json::from_value(args["key"].clone())?;
-    //let key: &[u8] = b64_2_num(key_string)?.to_ne_bytes();
     let key = BASE64_STANDARD.decode(key_string)?;
-    //eprintln!("{:?}", key);
     let input_string: String = serde_json::from_value(args["input"].clone())?;
-    //let plaintexts: &[u8] = &b64_2_num(plaintexts_string)?.to_ne_bytes();
     let input = BASE64_STANDARD.decode(input_string)?;
-    let xor_val: u128 = 0xc0ffeec0ffeec0ffeec0ffeec0ffee11;
 
     let mode: String = serde_json::from_value(args["mode"].clone())?;
     match mode.as_str() {
         "encrypt" => {
-            //eprintln!("{:?}", plaintexts);
-
             let output = BASE64_STANDARD.encode(sea_128_encrypt(&key, &input)?);
 
             Ok(output)
@@ -34,7 +28,6 @@ pub fn sea128(args: &Value) -> Result<String> {
 
 #[cfg(test)]
 mod tests {
-    use std::fs;
 
     use anyhow::Result;
     use serde_json::json;

src/utils/ciphers.rs

@@ -1,12 +1,12 @@
-use std::io::BufRead;
+use crate::utils::{field::ByteArray, poly::gfmul};
-
 use anyhow::Result;
 use openssl::symm::{Cipher, Crypter, Mode};
 
-use crate::utils::field::ByteArray;
-
 use super::math::xor_bytes;
 
+/// AES ENCRYPT
+/// Function to perform encryption with AES ECB mode
+/// Function does not use padding for blocks
 pub fn aes_128_encrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
     let mut encrypter = Crypter::new(Cipher::aes_128_ecb(), Mode::Encrypt, &key, None)?;
     encrypter.pad(false);
@@ -22,6 +22,9 @@ pub fn aes_128_encrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
     Ok(ciphertext)
 }
 
+/// AES DECRPYT
+/// Function to perform decryption with AES ECB mode
+/// Function does not use padding for blocks    
 pub fn aes_128_decrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
     let mut decrypter = Crypter::new(Cipher::aes_128_ecb(), Mode::Decrypt, key, None)?;
     decrypter.pad(false);
@@ -34,13 +37,18 @@ pub fn aes_128_decrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
 
     let mut bytes: [u8; 16] = [0u8; 16];
     bytes.copy_from_slice(&plaintext);
-    let number: u128 = <u128>::from_be_bytes(bytes);
 
     Ok(plaintext)
 }
 
+/// SEA ENCRYPT
+/// Function to perform sea encrption.
+/// At its core, the function ses the AES ENCRYPT, but then xors with a constant value of:
+/// 0xc0ffeec0ffeec0ffeec0ffeec0ffee11
 pub fn sea_128_encrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
+    // Constant value used for XOR
     let xor_val: u128 = 0xc0ffeec0ffeec0ffeec0ffeec0ffee11;
+
     let sea128_out = xor_bytes(
         &aes_128_encrypt(key, input)?,
         xor_val.to_be_bytes().to_vec(),
@@ -48,38 +56,30 @@ pub fn sea_128_encrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
     Ok(sea128_out)
 }
 
+/// SEA DECRYPT
+/// Function to perform sea decryption.
+/// At its core, the function ses the AES DECRYPT, but then xors with a constant value of:
+/// 0xc0ffeec0ffeec0ffeec0ffeec0ffee11
 pub fn sea_128_decrypt(key: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
+    // Constant value used for XOR
     let xor_val: u128 = 0xc0ffeec0ffeec0ffeec0ffeec0ffee11;
 
     let intermediate = xor_bytes(input, xor_val.to_be_bytes().to_vec())?;
     Ok(aes_128_decrypt(&key, &intermediate)?)
 }
 
+/// Function to perform xex encryption.
+/// The function performs the encryption for XEX on the basis of the SEA ENCRYPT.
 pub fn xex_encrypt(mut key: Vec<u8>, tweak: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
     let key2: Vec<u8> = key.split_off(16);
-    //let key1: ByteArray = ByteArray(vec![key_parts[0]]);
-    //let key2: ByteArray = ByteArray(vec![key_parts[1]]);
 
     let input_chunks: Vec<Vec<u8>> = input.chunks(16).map(|x| x.to_vec()).collect();
 
     let mut output: Vec<u8> = vec![];
-    //assert!(key.len() % 16 == 0, "Failure: Key len {}", key.len());
-    //assert!(key2.len() % 16 == 0, "Failure: Key2 len {}", key2.len());
     let mut tweak_block: ByteArray = ByteArray(sea_128_encrypt(&key2, tweak)?);
 
-    //dbg!("input_chunks: {:001X?}", &input_chunks);
-
     for chunk in input_chunks {
         let plaintext_intermediate = xor_bytes(&tweak_block.0, chunk)?;
-        /*
-                assert!(
-                    plaintext_intermediate.len() % 16 == 0,
-                    "Failure: plaintext_intermediate len was {}",
-                    plaintext_intermediate.len()
-                );
-        */
-        //assert!(key.len() % 16 == 0, "Failure: Key len {}", key.len());
-        //assert!(key2.len() % 16 == 0, "Failure: Key2 len {}", key2.len());
         let cypher_block_intermediate = sea_128_encrypt(&key, &plaintext_intermediate)?;
         let mut cypher_block = xor_bytes(&tweak_block.0, cypher_block_intermediate)?;
         output.append(cypher_block.as_mut());
@@ -91,28 +91,13 @@ pub fn xex_encrypt(mut key: Vec<u8>, tweak: &Vec<u8>, input: &Vec<u8>) -> Result
 
 pub fn xex_decrypt(mut key: Vec<u8>, tweak: &Vec<u8>, input: &Vec<u8>) -> Result<Vec<u8>> {
     let key2: Vec<u8> = key.split_off(16);
-    //let key1: ByteArray = ByteArray(vec![key_parts[0]]);
-    //let key2: ByteArray = ByteArray(vec![key_parts[1]]);
-
     let input_chunks: Vec<Vec<u8>> = input.chunks(16).map(|x| x.to_vec()).collect();
 
     let mut output: Vec<u8> = vec![];
-    //assert!(key.len() % 16 == 0, "Failure: Key len {}", key.len());
-    //assert!(key2.len() % 16 == 0, "Failure: Key2 len {}", key2.len());
     let mut tweak_block: ByteArray = ByteArray(sea_128_encrypt(&key2, tweak)?);
 
     for chunk in input_chunks {
         let cyphertext_intermediate = xor_bytes(&tweak_block.0, chunk)?;
-
-        /*
-        assert!(
-            cyphertext_intermediate.len() % 16 == 0,
-            "Failure: plaintext_intermediate len was {}",
-            cyphertext_intermediate.len()
-        );
-        assert!(key.len() % 16 == 0, "Failure: Key len {}", key.len());
-        assert!(key2.len() % 16 == 0, "Failure: Key2 len {}", key2.len());
-        */
         let plaintext_block_intermediate = sea_128_decrypt(&key, &cyphertext_intermediate)?;
         let mut cypher_block = xor_bytes(&tweak_block.0, plaintext_block_intermediate)?;
         output.append(cypher_block.as_mut());
@@ -122,12 +107,220 @@ pub fn xex_decrypt(mut key: Vec<u8>, tweak: &Vec<u8>, input: &Vec<u8>) -> Result
     Ok(output)
 }
 
-/*
+pub fn gcm_encrypt_aes(
-* let mut bytes: [u8; 16] = [0u8; 16];
+    mut nonce: Vec<u8>,
-    bytes.copy_from_slice(&ciphertext);
+    key: Vec<u8>,
-    let number: u128 = <u128>::from_be_bytes(bytes);
+    plaintext: Vec<u8>,
+    ad: Vec<u8>,
+) -> Result<(Vec<u8>, Vec<u8>, Vec<u8>, Vec<u8>)> {
+    let mut ciphertext: Vec<u8> = vec![];
 
-* */
+    let mut counter: u32 = 1;
+    nonce.append(counter.to_be_bytes().to_vec().as_mut());
+    //nonce.append(0u8.to_le_bytes().to_vec().as_mut());
+
+    let auth_tag_xor = aes_128_encrypt(&key, &nonce)?;
+
+    let auth_key_h = aes_128_encrypt(&key, &0u128.to_be_bytes().to_vec())?;
+
+    let plaintext_chunks: Vec<Vec<u8>> = plaintext.chunks(16).map(|x| x.to_vec()).collect();
+
+    counter = 2;
+    for chunk in plaintext_chunks {
+        nonce.drain(12..);
+        nonce.append(counter.to_be_bytes().to_vec().as_mut());
+
+        let inter1 = aes_128_encrypt(&key, &nonce)?;
+
+        let mut inter2 = xor_bytes(&inter1, chunk.clone())?;
+
+        ciphertext.append(inter2.as_mut());
+        counter += 1;
+    }
+
+    let mut l_field: Vec<u8> = ((ad.len() * 8) as u64).to_be_bytes().to_vec();
+    let mut c_len: Vec<u8> = ((ciphertext.len() * 8) as u64).to_be_bytes().to_vec();
+    l_field.append(c_len.as_mut());
+
+    let auth_tag = xor_bytes(
+        &ghash(auth_key_h.clone(), ad, ciphertext.clone(), l_field.clone())?,
+        auth_tag_xor,
+    )?;
+
+    Ok((ciphertext, auth_tag, l_field, auth_key_h))
+}
+
+pub fn gcm_decrypt_aes(
+    mut nonce: Vec<u8>,
+    key: Vec<u8>,
+    ciphertext: Vec<u8>,
+    ad: Vec<u8>,
+    tag: Vec<u8>,
+) -> Result<(Vec<u8>, bool)> {
+    let mut plaintext: Vec<u8> = vec![];
+
+    let mut counter: u32 = 1;
+    nonce.append(counter.to_be_bytes().to_vec().as_mut());
+
+    let auth_tag_xor = aes_128_encrypt(&key, &nonce)?;
+
+    let auth_key_h = aes_128_encrypt(&key, &0u128.to_be_bytes().to_vec())?;
+
+    let ciphertext_chunks: Vec<Vec<u8>> = ciphertext.chunks(16).map(|x| x.to_vec()).collect();
+
+    counter = 2;
+    for chunk in ciphertext_chunks {
+        nonce.drain(12..);
+        nonce.append(counter.to_be_bytes().to_vec().as_mut());
+
+        let inter1 = aes_128_encrypt(&key, &nonce)?;
+
+        let mut inter2 = xor_bytes(&inter1, chunk.clone())?;
+
+        plaintext.append(inter2.as_mut());
+        counter += 1;
+    }
+
+    let mut l_field: Vec<u8> = ((ad.len() * 8) as u64).to_be_bytes().to_vec();
+    let mut c_len: Vec<u8> = ((ciphertext.len() * 8) as u64).to_be_bytes().to_vec();
+    l_field.append(c_len.as_mut());
+
+    let auth_tag = xor_bytes(
+        &ghash(auth_key_h.clone(), ad, ciphertext.clone(), l_field.clone())?,
+        auth_tag_xor,
+    )?;
+
+    let valid = auth_tag == tag;
+
+    Ok((plaintext, valid))
+}
+
+pub fn gcm_encrypt_sea(
+    mut nonce: Vec<u8>,
+    key: Vec<u8>,
+    plaintext: Vec<u8>,
+    ad: Vec<u8>,
+) -> Result<(Vec<u8>, Vec<u8>, Vec<u8>, Vec<u8>)> {
+    let mut ciphertext: Vec<u8> = vec![];
+
+    let mut counter: u32 = 1;
+    nonce.append(counter.to_be_bytes().to_vec().as_mut());
+    //nonce.append(0u8.to_le_bytes().to_vec().as_mut());
+
+    let auth_tag_xor = sea_128_encrypt(&key, &nonce)?;
+
+    let auth_key_h = sea_128_encrypt(&key, &0u128.to_be_bytes().to_vec())?;
+
+    let plaintext_chunks: Vec<Vec<u8>> = plaintext.chunks(16).map(|x| x.to_vec()).collect();
+
+    counter = 2;
+    for chunk in plaintext_chunks {
+        nonce.drain(12..);
+        nonce.append(counter.to_be_bytes().to_vec().as_mut());
+
+        let inter1 = sea_128_encrypt(&key, &nonce)?;
+
+        let mut inter2 = xor_bytes(&inter1, chunk.clone())?;
+
+        ciphertext.append(inter2.as_mut());
+        counter += 1;
+    }
+
+    let mut l_field: Vec<u8> = ((ad.len() * 8) as u64).to_be_bytes().to_vec();
+    let mut c_len: Vec<u8> = ((ciphertext.len() * 8) as u64).to_be_bytes().to_vec();
+    l_field.append(c_len.as_mut());
+
+    let auth_tag = xor_bytes(
+        &ghash(auth_key_h.clone(), ad, ciphertext.clone(), l_field.clone())?,
+        auth_tag_xor,
+    )?;
+
+    Ok((ciphertext, auth_tag, l_field, auth_key_h))
+}
+
+pub fn gcm_decrypt_sea(
+    mut nonce: Vec<u8>,
+    key: Vec<u8>,
+    ciphertext: Vec<u8>,
+    ad: Vec<u8>,
+    tag: Vec<u8>,
+) -> Result<(Vec<u8>, bool)> {
+    let mut plaintext: Vec<u8> = vec![];
+
+    let mut counter: u32 = 1;
+    nonce.append(counter.to_be_bytes().to_vec().as_mut());
+
+    let auth_tag_xor = sea_128_encrypt(&key, &nonce)?;
+
+    let auth_key_h = sea_128_encrypt(&key, &0u128.to_be_bytes().to_vec())?;
+
+    let plaintext_chunks: Vec<Vec<u8>> = ciphertext.chunks(16).map(|x| x.to_vec()).collect();
+
+    counter = 2;
+    for chunk in plaintext_chunks {
+        nonce.drain(12..);
+        nonce.append(counter.to_be_bytes().to_vec().as_mut());
+
+        let inter1 = sea_128_encrypt(&key, &nonce)?;
+
+        let mut inter2 = xor_bytes(&inter1, chunk.clone())?;
+
+        plaintext.append(inter2.as_mut());
+        counter += 1;
+    }
+
+    let mut l_field: Vec<u8> = ((ad.len() * 8) as u64).to_be_bytes().to_vec();
+    let mut c_len: Vec<u8> = ((plaintext.len() * 8) as u64).to_be_bytes().to_vec();
+    l_field.append(c_len.as_mut());
+
+    let auth_tag = xor_bytes(
+        &ghash(auth_key_h.clone(), ad, ciphertext.clone(), l_field.clone())?,
+        auth_tag_xor,
+    )?;
+
+    let valid = auth_tag == tag;
+
+    Ok((plaintext, valid))
+}
+
+pub fn ghash(
+    auth_key_h: Vec<u8>,
+    mut ad: Vec<u8>,
+    mut ciphertext: Vec<u8>,
+    l_field: Vec<u8>,
+) -> Result<Vec<u8>> {
+    let output: Vec<u8> = vec![0; 16];
+
+    if ad.len() % 16 != 0 || ad.is_empty() {
+        ad.append(vec![0u8; 16 - (ad.len() % 16)].as_mut());
+    }
+
+    if ciphertext.len() % 16 != 0 {
+        ciphertext.append(vec![0u8; 16 - (ciphertext.len() % 16)].as_mut());
+    }
+
+    let mut ad_chunks = ad.chunks(16);
+
+    let inter1 = xor_bytes(&output, ad_chunks.next().unwrap().to_vec())?;
+    let mut inter_loop = gfmul(&inter1, &auth_key_h, "gcm")?;
+
+    for chunk in ad_chunks {
+        let inter2 = xor_bytes(&inter_loop, chunk.to_vec())?;
+        inter_loop = gfmul(&inter2, &auth_key_h, "gcm")?;
+    }
+
+    let cipher_chunks = ciphertext.chunks(16);
+
+    for chunk in cipher_chunks {
+        let inter3 = xor_bytes(&inter_loop, chunk.to_vec())?;
+        inter_loop = gfmul(&inter3, &auth_key_h, "gcm")?;
+    }
+
+    let inter4 = xor_bytes(&inter_loop, l_field)?;
+    inter_loop = gfmul(&inter4, &auth_key_h, "gcm")?;
+
+    Ok(inter_loop)
+}
 
 #[cfg(test)]
 mod tests {
@@ -180,4 +373,190 @@ mod tests {
 
         Ok(())
     }
+
+    #[test]
+    fn test_gcm_encrypt_aes() -> Result<()> {
+        let nonce = BASE64_STANDARD.decode("4gF+BtR3ku/PUQci")?;
+        let key = BASE64_STANDARD.decode("Xjq/GkpTSWoe3ZH0F+tjrQ==")?;
+        let plaintext = BASE64_STANDARD.decode("RGFzIGlzdCBlaW4gVGVzdA==")?;
+        let ad = BASE64_STANDARD.decode("QUQtRGF0ZW4=")?;
+
+        let (ciphertext, auth_tag, l_field, auth_key_h) =
+            gcm_encrypt_aes(nonce, key, plaintext, ad)?;
+
+        eprintln!(
+            "Cipher: {:001X?} \n Tag: {:001X?} \n L_Field: {:001X?} \n H: {:001X?}",
+            BASE64_STANDARD.encode(&ciphertext),
+            BASE64_STANDARD.encode(&auth_tag),
+            BASE64_STANDARD.encode(&l_field),
+            BASE64_STANDARD.encode(&auth_key_h)
+        );
+
+        assert_eq!(
+            BASE64_STANDARD.encode(ciphertext),
+            "ET3RmvH/Hbuxba63EuPRrw=="
+        );
+        assert_eq!(BASE64_STANDARD.encode(auth_tag), "Mp0APJb/ZIURRwQlMgNN/w==");
+        assert_eq!(BASE64_STANDARD.encode(l_field), "AAAAAAAAAEAAAAAAAAAAgA==");
+        assert_eq!(
+            BASE64_STANDARD.encode(auth_key_h),
+            "Bu6ywbsUKlpmZXMQyuGAng=="
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_gcm_encrypt_aes_long_ad() -> Result<()> {
+        let nonce = BASE64_STANDARD.decode("yv66vvrO263eyviI")?;
+        let key = BASE64_STANDARD.decode("/v/pkoZlcxxtao+UZzCDCA==")?;
+        let plaintext = BASE64_STANDARD.decode(
+            "2TEyJfiEBuWlWQnFr/UmmoanqVMVNPfaLkwwPYoxinIcPAyVlWgJUy/PDiRJprUlsWrt9aoN5le6Y3s5",
+        )?;
+        let ad = BASE64_STANDARD.decode("/u36zt6tvu/+7frO3q2+76ut2tI=")?;
+
+        let (ciphertext, auth_tag, l_field, auth_key_h) =
+            gcm_encrypt_aes(nonce, key, plaintext, ad)?;
+
+        eprintln!(
+            "Cipher: {:001X?} \n Tag: {:001X?} \n L_Field: {:001X?} \n H: {:001X?}",
+            BASE64_STANDARD.encode(&ciphertext),
+            BASE64_STANDARD.encode(&auth_tag),
+            BASE64_STANDARD.encode(&l_field),
+            BASE64_STANDARD.encode(&auth_key_h)
+        );
+
+        assert_eq!(
+            BASE64_STANDARD.encode(ciphertext),
+            "QoMewiF3dCRLciG3hNDUnOOqIS8sAqTgNcF+IymsoS4h1RSyVGaTHH2PalqshKoFG6MLOWoKrJc9WOCR"
+        );
+        assert_eq!(BASE64_STANDARD.encode(auth_tag), "W8lPvDIhpduU+ula5xIaRw==");
+        assert_eq!(BASE64_STANDARD.encode(l_field), "AAAAAAAAAKAAAAAAAAAB4A==");
+        assert_eq!(
+            BASE64_STANDARD.encode(auth_key_h),
+            "uDtTNwi/U10KpuUpgNU7eA=="
+        );
+
+        Ok(())
+    }
+    /*
+        * TODO:Not sure if this case can really happen in our data
+
+        #[test]
+        fn test_gcm_encrypt_aes_long_0000() -> Result<()> {
+            let nonce = BASE64_STANDARD.decode(
+                "kxMiXfiEBuVVkJxa/1Jpqmp6lThTT32h5MMD0qMYpyjDwMlRVoCVOfzw4kKaa1JUFq7b9aDealemN7Ob",
+            )?;
+            let key = BASE64_STANDARD.decode("/v/pkoZlcxxtao+UZzCDCP7/6ZKGZXMcbWqPlGcwgwg=")?;
+            let plaintext = BASE64_STANDARD.decode(
+                "2TEyJfiEBuWlWQnFr/UmmoanqVMVNPfaLkwwPYoxinIcPAyVlWgJUy/PDiRJprUlsWrt9aoN5le6Y3s5",
+            )?;
+            let ad = BASE64_STANDARD.decode("/u36zt6tvu/+7frO3q2+76ut2tI=")?;
+
+            let (ciphertext, auth_tag, l_field, auth_key_h) =
+                gcm_encrypt_aes(nonce, key, plaintext, ad)?;
+
+            eprintln!(
+                "Cipher: {:001X?} \n Tag: {:001X?} \n L_Field: {:001X?} \n H: {:001X?}",
+                BASE64_STANDARD.encode(&ciphertext),
+                BASE64_STANDARD.encode(&auth_tag),
+                BASE64_STANDARD.encode(&l_field),
+                BASE64_STANDARD.encode(&auth_key_h)
+            );
+
+            assert_eq!(
+                BASE64_STANDARD.encode(ciphertext),
+                "Wo3vLwyeU/H3XXhTZZ4qIO6ysiqv3mQZoFirT290a/QPwMO3gPJERS2j6/HF2CzeokGJlyAO+C5Ern4/"
+            );
+            assert_eq!(BASE64_STANDARD.encode(auth_tag), "pEqCZu4cjrDItdTPWunxmg==");
+            assert_eq!(BASE64_STANDARD.encode(l_field), "AAAAAAAAAKAAAAAAAAAB4A==");
+            assert_eq!(
+                BASE64_STANDARD.encode(auth_key_h),
+                "rL7yBXm0uOvOiJushzLa1w=="
+            );
+
+            Ok(())
+        }
+    */
+    #[test]
+    fn test_gcm_encrypt_sea() -> Result<()> {
+        let nonce = BASE64_STANDARD.decode("4gF+BtR3ku/PUQci")?;
+        let key = BASE64_STANDARD.decode("Xjq/GkpTSWoe3ZH0F+tjrQ==")?;
+        let plaintext = BASE64_STANDARD.decode("RGFzIGlzdCBlaW4gVGVzdA==")?;
+        let ad = BASE64_STANDARD.decode("QUQtRGF0ZW4=")?;
+
+        let (ciphertext, auth_tag, l_field, auth_key_h) =
+            gcm_encrypt_sea(nonce, key, plaintext, ad)?;
+
+        eprintln!(
+            "Cipher: {:001X?} \n Tag: {:001X?} \n L_Field: {:001X?} \n H: {:001X?}",
+            BASE64_STANDARD.encode(&ciphertext),
+            BASE64_STANDARD.encode(&auth_tag),
+            BASE64_STANDARD.encode(&l_field),
+            BASE64_STANDARD.encode(&auth_key_h)
+        );
+
+        assert_eq!(
+            BASE64_STANDARD.encode(ciphertext),
+            "0cI/Wg4R3URfrVFZ0hw/vg=="
+        );
+        assert_eq!(BASE64_STANDARD.encode(auth_tag), "ysDdzOSnqLH0MQ+Mkb23gw==");
+        assert_eq!(BASE64_STANDARD.encode(l_field), "AAAAAAAAAEAAAAAAAAAAgA==");
+        assert_eq!(
+            BASE64_STANDARD.encode(auth_key_h),
+            "xhFcAUT66qWIpYz+Ch5ujw=="
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_gcm_decrypt_aes() -> Result<()> {
+        let nonce = BASE64_STANDARD.decode("4gF+BtR3ku/PUQci")?;
+        let key = BASE64_STANDARD.decode("Xjq/GkpTSWoe3ZH0F+tjrQ==")?;
+        let ciphertext = BASE64_STANDARD.decode("ET3RmvH/Hbuxba63EuPRrw==")?;
+        let ad = BASE64_STANDARD.decode("QUQtRGF0ZW4=")?;
+        let tag = BASE64_STANDARD.decode("Mp0APJb/ZIURRwQlMgNN/w==")?;
+
+        let (plaintext, valid) = gcm_decrypt_aes(nonce, key, ciphertext, ad, tag)?;
+
+        eprintln!(
+            "Cipher: {:001X?} \n Valids: {:001X?}",
+            BASE64_STANDARD.encode(&plaintext),
+            &valid,
+        );
+
+        assert_eq!(
+            BASE64_STANDARD.encode(plaintext),
+            "RGFzIGlzdCBlaW4gVGVzdA=="
+        );
+        assert_eq!(valid, true);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_gcm_decrypt_sea() -> Result<()> {
+        let nonce = BASE64_STANDARD.decode("4gF+BtR3ku/PUQci")?;
+        let key = BASE64_STANDARD.decode("Xjq/GkpTSWoe3ZH0F+tjrQ==")?;
+        let ciphertext = BASE64_STANDARD.decode("0cI/Wg4R3URfrVFZ0hw/vg==")?;
+        let ad = BASE64_STANDARD.decode("QUQtRGF0ZW4=")?;
+        let tag = BASE64_STANDARD.decode("ysDdzOSnqLH0MQ+Mkb23gw==")?;
+
+        let (plaintext, valid) = gcm_decrypt_sea(nonce, key, ciphertext, ad, tag)?;
+
+        eprintln!(
+            "Plaintext: {:001X?} \n Valid: {:001X?}",
+            BASE64_STANDARD.encode(&plaintext),
+            &valid,
+        );
+
+        assert_eq!(
+            BASE64_STANDARD.encode(plaintext),
+            "RGFzIGlzdCBlaW4gVGVzdA=="
+        );
+        assert_eq!(valid, true);
+
+        Ok(())
+    }
 }

src/utils/dff.rs

@@ -0,0 +1,81 @@
+use std::usize;
+
+use num::{pow::Pow, BigUint, FromPrimitive};
+use serde::{Deserialize, Serialize};
+
+use super::poly::{gcd, Polynomial};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Factors {
+    pub factor: Vec<String>,
+    pub degree: u32,
+}
+
+pub fn ddf(f: Polynomial) -> Vec<(Polynomial, u128)> {
+    let q = BigUint::pow(&BigUint::from_u8(2).unwrap(), 128);
+
+    let mut z: Vec<(Polynomial, u128)> = vec![];
+    let mut d: u128 = 1;
+    let mut f_star = f.clone();
+
+    let one_cmp = Polynomial::one();
+
+    while f_star.degree() as u128 >= (2 * d) {
+        let h = Polynomial::x().bpow_mod(q.clone().pow(d), &f_star.clone()) + Polynomial::x();
+
+        let g = gcd(&h, &f_star);
+        if g != one_cmp {
+            z.push((g.clone(), d));
+            f_star = f_star.div(&g).0;
+        }
+
+        d += 1;
+    }
+
+    if f_star != one_cmp {
+        z.push((f_star.clone(), f_star.degree() as u128));
+    } else if z.len() == 0 {
+        z.push((f.clone(), 1));
+    }
+
+    z
+}
+
+#[cfg(test)]
+mod tests {
+
+    use serde_json::json;
+
+    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    use super::*;
+
+    #[test]
+    fn test_dff_sheet() {
+        let json_f = json!([
+            "tpkgAAAAAAAAAAAAAAAAAA==",
+            "m6MQAAAAAAAAAAAAAAAAAA==",
+            "8roAAAAAAAAAAAAAAAAAAA==",
+            "3dUAAAAAAAAAAAAAAAAAAA==",
+            "FwAAAAAAAAAAAAAAAAAAAA==",
+            "/kAAAAAAAAAAAAAAAAAAAA==",
+            "a4AAAAAAAAAAAAAAAAAAAA==",
+            "gAAAAAAAAAAAAAAAAAAAAA=="
+        ]);
+        let poly_f = Polynomial::from_c_array(&json_f);
+
+        let mut factors = ddf(poly_f);
+        factors.sort();
+        let mut result: Vec<Factors> = vec![];
+
+        for (factor, degree) in factors {
+            result.push(Factors {
+                factor: factor.to_c_array(),
+                degree: degree as u32,
+            });
+        }
+
+        println!("Result: {:?}", result);
+        let _bit_indices: Vec<u8> = vec![0];
+        assert!(false)
+    }
+}

src/utils/edf.rs

@@ -0,0 +1,86 @@
+use num::{BigUint, FromPrimitive, One};
+use rand::Rng;
+
+use super::poly::{gcd, Polynomial};
+
+pub fn edf(f: Polynomial, d: u32) -> Vec<Polynomial> {
+    let q = BigUint::pow(&BigUint::from_u8(2).unwrap(), 128);
+    let n: u32 = (f.degree() as u32) / (d);
+    let mut z: Vec<Polynomial> = vec![f.clone()];
+    let one_cmp = Polynomial::one();
+
+    while (z.len() as u32) < n {
+        let h = Polynomial::rand(&rand::thread_rng().gen_range(1..=f.degree()));
+
+        let exponent = (q.pow(d) - BigUint::one()) / BigUint::from_u8(3).unwrap();
+
+        let g = h.bpow_mod(exponent, &f) + Polynomial::one();
+
+        for i in (0..z.len()).rev() {
+            if z[i].degree() as u32 > d {
+                let j = gcd(&z[i], &g);
+                if j != one_cmp && j != z[i] {
+                    let intemediate = z[i].div(&j).0;
+                    z.remove(i);
+                    z.push(j.clone());
+                    z.push(intemediate);
+                }
+            }
+        }
+    }
+
+    z
+}
+
+#[cfg(test)]
+mod tests {
+
+    use serde_json::json;
+
+    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    use super::*;
+
+    #[test]
+    fn test_edf_sheet() {
+        let json_f = json!([
+            "mmAAAAAAAAAAAAAAAAAAAA==",
+            "AbAAAAAAAAAAAAAAAAAAAA==",
+            "zgAAAAAAAAAAAAAAAAAAAA==",
+            "FwAAAAAAAAAAAAAAAAAAAA==",
+            "AAAAAAAAAAAAAAAAAAAAAA==",
+            "wAAAAAAAAAAAAAAAAAAAAA==",
+            "gAAAAAAAAAAAAAAAAAAAAA=="
+        ]);
+        let d = 3;
+        let poly_f = Polynomial::from_c_array(&json_f);
+
+        let mut factors = edf(poly_f, d);
+        factors.sort();
+
+        let mut result: Vec<Vec<String>> = vec![];
+
+        for factor in factors {
+            result.push(factor.to_c_array())
+        }
+
+        println!("Result: {:?}", result);
+
+        assert_eq!(
+            result,
+            vec![
+                [
+                    "iwAAAAAAAAAAAAAAAAAAAA==",
+                    "CAAAAAAAAAAAAAAAAAAAAA==",
+                    "AAAAAAAAAAAAAAAAAAAAAA==",
+                    "gAAAAAAAAAAAAAAAAAAAAA=="
+                ],
+                [
+                    "kAAAAAAAAAAAAAAAAAAAAA==",
+                    "CAAAAAAAAAAAAAAAAAAAAA==",
+                    "wAAAAAAAAAAAAAAAAAAAAA==",
+                    "gAAAAAAAAAAAAAAAAAAAAA=="
+                ]
+            ]
+        )
+    }
+}

src/utils/field.rs

@@ -1,7 +1,239 @@
-use anyhow::{anyhow, Ok, Result};
+use base64::prelude::*;
-use base64::Engine;
+use std::{u128, u8, usize};
 
-use super::poly::gfmul;
+use std::{
+    cmp::Ordering,
+    ops::{Add, BitXor, Div, Mul},
+};
+
+use anyhow::{anyhow, Ok, Result};
+
+use super::{
+    math::{reverse_bits_in_bytevec, xor_bytes},
+    poly::gfmul,
+};
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub struct FieldElement {
+    field_element: Vec<u8>,
+}
+
+impl FieldElement {
+    pub const IRREDUCIBLE_POLYNOMIAL: [u8; 17] = [
+        0x87, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 0x01,
+    ];
+
+    pub fn rand() -> Self {
+        let rand_field: [u8; 16] = rand::random();
+        FieldElement::new_no_convert(rand_field.to_vec())
+    }
+
+    pub fn zero() -> Self {
+        FieldElement::new_no_convert(vec![0; 16])
+    }
+
+    pub fn one() -> Self {
+        FieldElement::new_no_convert(vec![0x01, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
+    }
+
+    pub fn to_vec(&self) -> Vec<u8> {
+        self.field_element.clone()
+    }
+
+    pub fn new(field_element: Vec<u8>) -> Self {
+        Self {
+            field_element: reverse_bits_in_bytevec(field_element),
+        }
+    }
+
+    pub fn new_no_convert(field_element: Vec<u8>) -> Self {
+        Self { field_element }
+    }
+
+    pub fn mul(&self, poly_a: Vec<u8>, poly_b: Vec<u8>) -> Result<Vec<u8>> {
+        gfmul(&poly_a, &poly_b, "gcm")
+    }
+
+    pub fn to_b64(&self) -> String {
+        BASE64_STANDARD.encode(reverse_bits_in_bytevec(self.field_element.to_owned()))
+    }
+
+    pub fn pow(mut self, mut exponent: u128) -> FieldElement {
+        let mut result: FieldElement = FieldElement::one();
+
+        if exponent == 1 {
+            return self;
+        }
+
+        if exponent == 0 {
+            let result = FieldElement::one();
+
+            return result;
+        }
+
+        while exponent > 0 {
+            if exponent & 1 == 1 {
+                let temp = &self * &result;
+
+                result = temp
+            }
+            let temp_square = &self * &self;
+
+            self = temp_square;
+            exponent >>= 1;
+        }
+
+        result
+    }
+
+    pub fn inv(mut self) -> Self {
+        const INVERSER_START: u128 = 0xfffffffffffffffffffffffffffffffe;
+
+        let mut inverser = INVERSER_START;
+        let mut inverse: Vec<u8> = vec![0x01, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
+
+        while inverser > 0 {
+            if inverser & 1 == 1 {
+                inverse = gfmul(&self.field_element, &inverse, "xex").unwrap();
+            }
+            inverser >>= 1;
+            self.field_element = gfmul(&self.field_element, &self.field_element, "xex")
+                .expect("Error in sqrmul sqr");
+        }
+        FieldElement::new_no_convert(inverse)
+    }
+
+    pub fn is_zero(&self) -> bool {
+        self.field_element.iter().all(|&x| x == 0x00)
+    }
+
+    pub fn reverse_bits(&self) -> Self {
+        FieldElement::new_no_convert(reverse_bits_in_bytevec(self.field_element.clone()))
+    }
+}
+
+impl Mul for FieldElement {
+    type Output = Self;
+
+    fn mul(self, rhs: Self) -> Self::Output {
+        FieldElement::new_no_convert(
+            gfmul(&self.field_element, &rhs.field_element, "xex")
+                .expect("Error during multiplication"),
+        )
+    }
+}
+
+impl Mul for &FieldElement {
+    type Output = FieldElement;
+
+    fn mul(self, rhs: &FieldElement) -> FieldElement {
+        FieldElement::new_no_convert(
+            gfmul(&self.field_element, &rhs.field_element, "xex")
+                .expect("Error during multiplication"),
+        )
+    }
+}
+
+impl Add for FieldElement {
+    type Output = Self;
+    fn add(self, rhs: Self) -> Self::Output {
+        FieldElement::new_no_convert(
+            xor_bytes(&self.field_element, rhs.field_element).expect("Error in poly add"),
+        )
+    }
+}
+
+impl Add for &FieldElement {
+    type Output = FieldElement;
+    fn add(self, rhs: Self) -> Self::Output {
+        FieldElement::new_no_convert(
+            xor_bytes(&self.field_element, rhs.field_element.clone()).expect("Error in poly add"),
+        )
+    }
+}
+
+impl AsRef<[u8]> for FieldElement {
+    fn as_ref(&self) -> &[u8] {
+        &self.field_element.as_ref()
+    }
+}
+
+impl Clone for FieldElement {
+    fn clone(&self) -> Self {
+        FieldElement {
+            field_element: self.field_element.clone(),
+        }
+    }
+}
+
+impl BitXor for FieldElement {
+    type Output = Self;
+    fn bitxor(self, rhs: Self) -> Self::Output {
+        let result: Vec<u8> = self
+            .field_element
+            .iter()
+            .zip(rhs.field_element.iter())
+            .map(|(&x1, &x2)| x1 ^ x2)
+            .collect();
+        FieldElement::new_no_convert(result)
+    }
+}
+
+impl Div for FieldElement {
+    type Output = Self;
+    fn div(self, rhs: Self) -> Self::Output {
+        let inverse = rhs.inv();
+        self * inverse
+    }
+}
+
+impl Div for &FieldElement {
+    type Output = FieldElement;
+
+    fn div(self, rhs: Self) -> Self::Output {
+        self.clone() * rhs.clone().inv()
+    }
+}
+
+impl PartialOrd for FieldElement {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        for (byte_a, byte_b) in self.as_ref().iter().rev().zip(other.as_ref().iter().rev()) {
+            if byte_a > byte_b {
+                return Some(Ordering::Greater);
+            } else if byte_a < byte_b {
+                return Some(Ordering::Less);
+            } else {
+                continue;
+            }
+        }
+        Some(Ordering::Equal)
+    }
+}
+
+impl PartialEq for FieldElement {
+    fn eq(&self, other: &Self) -> bool {
+        self.field_element == other.field_element
+    }
+}
+
+impl Eq for FieldElement {
+    // add code here
+}
+
+impl Ord for FieldElement {
+    fn cmp(&self, other: &Self) -> Ordering {
+        for (byte_a, byte_b) in self.as_ref().iter().rev().zip(other.as_ref().iter().rev()) {
+            if byte_a > byte_b {
+                return Ordering::Greater;
+            } else if byte_a < byte_b {
+                return Ordering::Less;
+            } else {
+                continue;
+            }
+        }
+        Ordering::Equal
+    }
+}
 
 #[derive(Debug)]
 pub struct ByteArray(pub Vec<u8>);
@@ -37,13 +269,13 @@ impl ByteArray {
                 let alpha_poly: Vec<u8> = base64::prelude::BASE64_STANDARD
                     .decode("AgAAAAAAAAAAAAAAAAAAAA==")
                     .expect("Decode failed");
-                self.0 = gfmul(self.0.clone(), alpha_poly, "xex").unwrap();
+                self.0 = gfmul(&self.0, &alpha_poly, "xex").unwrap();
             }
             "gcm" => {
                 let alpha_poly: Vec<u8> = base64::prelude::BASE64_STANDARD
                     .decode("AgAAAAAAAAAAAAAAAAAAAA==")
                     .expect("Decode failed");
-                self.0 = gfmul(self.0.clone(), alpha_poly, "gcm").unwrap();
+                self.0 = gfmul(&self.0, &alpha_poly, "gcm").unwrap();
             }
             _ => {}
         }
@@ -96,18 +328,21 @@ impl ByteArray {
         }
         true
     }
+
+    pub fn reverse_bits_in_bytevec(&mut self) {
+        self.0 = self.0.iter_mut().map(|byte| byte.reverse_bits()).collect();
+    }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::fs;
 
     #[test]
     fn test_byte_array_shift1() {
         let mut byte_array: ByteArray = ByteArray(vec![0x00, 0x01]);
         let shifted_array: ByteArray = ByteArray(vec![0x00, 0x02]);
-        byte_array.left_shift("xex");
+        byte_array.left_shift("xex").unwrap();
 
         assert_eq!(byte_array.0, shifted_array.0);
     }
@@ -116,7 +351,7 @@ mod tests {
     fn test_byte_array_shift2() {
         let mut byte_array: ByteArray = ByteArray(vec![0xFF, 0x00]);
         let shifted_array: ByteArray = ByteArray(vec![0xFE, 0x01]);
-        byte_array.left_shift("xex");
+        byte_array.left_shift("xex").unwrap();
 
         assert_eq!(
             byte_array.0, shifted_array.0,
@@ -129,7 +364,7 @@ mod tests {
     fn test_byte_array_shift1_gcm() {
         let mut byte_array: ByteArray = ByteArray(vec![0xFF, 0x00]);
         let shifted_array: ByteArray = ByteArray(vec![0x7F, 0x80]);
-        byte_array.left_shift("gcm");
+        byte_array.left_shift("gcm").unwrap();
 
         assert_eq!(
             byte_array.0, shifted_array.0,
@@ -142,7 +377,7 @@ mod tests {
     fn test_byte_array_shift1_right_gcm() {
         let mut byte_array: ByteArray = ByteArray(vec![0xFF, 0x00]);
         let shifted_array: ByteArray = ByteArray(vec![0xFE, 0x00]);
-        byte_array.right_shift("gcm");
+        byte_array.right_shift("gcm").unwrap();
 
         assert_eq!(
             byte_array.0, shifted_array.0,
@@ -155,7 +390,7 @@ mod tests {
     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("xex");
+        byte_array.right_shift("xex").unwrap();
 
         assert_eq!(
             byte_array.0, shifted_array.0,
@@ -195,4 +430,39 @@ mod tests {
 
         assert_eq!(byte_array.0, vec![0x55, 0x55]);
     }
+
+    #[test]
+    fn test_field_add_01() {
+        let element1: FieldElement =
+            FieldElement::new(BASE64_STANDARD.decode("NeverGonnaGiveYouUpAAA==").unwrap());
+        let element2: FieldElement =
+            FieldElement::new(BASE64_STANDARD.decode("KryptoanalyseAAAAAAAAA==").unwrap());
+        let sum = element2 + element1;
+
+        assert_eq!(sum.to_b64(), "H1d3GuyA9/0OxeYouUpAAA==");
+    }
+
+    #[test]
+    fn test_field_add_02() {
+        let element1: FieldElement =
+            FieldElement::new(BASE64_STANDARD.decode("NeverGonnaLetYouDownAA==").unwrap());
+        let element2: FieldElement =
+            FieldElement::new(BASE64_STANDARD.decode("DHBWMannheimAAAAAAAAAA==").unwrap());
+        let sum = element2 + element1;
+
+        assert_eq!(sum.to_b64(), "OZuIncPAGEp4tYouDownAA==");
+    }
+
+    #[test]
+    fn test_field_div_01() {
+        let element1 =
+            FieldElement::new(BASE64_STANDARD.decode("JAAAAAAAAAAAAAAAAAAAAA==").unwrap());
+
+        let element2 =
+            FieldElement::new(BASE64_STANDARD.decode("wAAAAAAAAAAAAAAAAAAAAA==").unwrap());
+
+        let result = element1 / element2;
+
+        assert_eq!(result.to_b64(), "OAAAAAAAAAAAAAAAAAAAAA==");
+    }
 }

src/utils/math.rs

@@ -1,7 +1,5 @@
-use anyhow::{anyhow, Ok, Result};
+use anyhow::{Ok, Result};
-use base64::Engine;
 
-use super::poly::gfmul;
 
 pub fn xor_bytes(vec1: &Vec<u8>, mut vec2: Vec<u8>) -> Result<Vec<u8>> {
     for (byte1, byte2) in vec1.iter().zip(vec2.iter_mut()) {
@@ -10,3 +8,9 @@ pub fn xor_bytes(vec1: &Vec<u8>, mut vec2: Vec<u8>) -> Result<Vec<u8>> {
 
     Ok(vec2)
 }
+
+pub fn reverse_bits_in_bytevec(mut vec: Vec<u8>) -> Vec<u8> {
+    vec = vec.iter_mut().map(|byte| byte.reverse_bits()).collect();
+
+    vec
+}

src/utils/mod.rs

@@ -1,5 +1,9 @@
 pub mod ciphers;
+pub mod dff;
+pub mod edf;
 pub mod field;
 pub mod math;
+pub mod net;
 pub mod parse;
 pub mod poly;
+pub mod sff;

src/utils/net.rs

@@ -0,0 +1 @@
+

src/utils/parse.rs

@@ -8,13 +8,13 @@ pub struct Testcases {
     pub testcases: HashMap<String, Testcase>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct Testcase {
     pub action: String,
     pub arguments: Value,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct Responses {
     pub responses: HashMap<String, Value>,
 }
@@ -28,8 +28,6 @@ pub fn parse_json(json: String) -> Result<Testcases> {
 mod tests {
     use std::fs;
 
-    use serde_json::json;
-
     // Note this useful idiom: importing names from outer (for mod tests) scope.
     use super::*;
 

src/utils/sff.rs

@@ -0,0 +1,92 @@
+use serde::{Deserialize, Serialize};
+
+use crate::utils::{
+    field::FieldElement,
+    poly::{gcd, polynomial_2_block},
+};
+
+use super::poly::Polynomial;
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Factors {
+    pub factor: Vec<String>,
+    pub exponent: u128,
+}
+
+pub fn sff(mut f: Polynomial) -> Vec<(Polynomial, u128)> {
+    let mut c = gcd(&f, &f.clone().diff());
+    f = f.div(&c).0;
+    let mut z: Vec<(Polynomial, u128)> = vec![];
+    let mut e: u128 = 1;
+
+    let one_element = Polynomial::new(vec![FieldElement::new(
+        polynomial_2_block(vec![0], "gcm").unwrap(),
+    )]);
+
+    while f != one_element {
+        let y = gcd(&f, &c);
+        if f != y {
+            z.push(((f.div(&y).0), e));
+        }
+
+        f = y.clone();
+        c = c.div(&y).0;
+        e += 1;
+    }
+
+    if c != one_element {
+        let r = sff(c.sqrt());
+        for (f_star, e_star) in r {
+            z.push((f_star, 2 * e_star));
+        }
+    }
+
+    z
+}
+
+#[cfg(test)]
+mod tests {
+
+    use serde_json::json;
+    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    use super::*;
+
+    #[test]
+    fn byte_indices_0x01() {
+        let json_f = json!([
+            "vL77UwAAAAAAAAAAAAAAAA==",
+            "mEHchYAAAAAAAAAAAAAAAA==",
+            "9WJa0MAAAAAAAAAAAAAAAA==",
+            "akHfwWAAAAAAAAAAAAAAAA==",
+            "E12o/QAAAAAAAAAAAAAAAA==",
+            "vKJ/FgAAAAAAAAAAAAAAAA==",
+            "yctWwAAAAAAAAAAAAAAAAA==",
+            "c1BXYAAAAAAAAAAAAAAAAA==",
+            "o0AtAAAAAAAAAAAAAAAAAA==",
+            "AbP2AAAAAAAAAAAAAAAAAA==",
+            "k2YAAAAAAAAAAAAAAAAAAA==",
+            "vBYAAAAAAAAAAAAAAAAAAA==",
+            "dSAAAAAAAAAAAAAAAAAAAA==",
+            "69gAAAAAAAAAAAAAAAAAAA==",
+            "VkAAAAAAAAAAAAAAAAAAAA==",
+            "a4AAAAAAAAAAAAAAAAAAAA==",
+            "gAAAAAAAAAAAAAAAAAAAAA=="
+        ]);
+        let poly_f = Polynomial::from_c_array(&json_f);
+
+        let mut factors = sff(poly_f);
+        factors.sort();
+        let mut result: Vec<Factors> = vec![];
+
+        for (factor, exponent) in factors {
+            result.push(Factors {
+                factor: factor.to_c_array(),
+                exponent,
+            });
+        }
+
+        println!("{:?}", result);
+        let _bit_indices: Vec<u8> = vec![0];
+        assert!(false)
+    }
+}

test_json/gcm_decrypt_aes.json

@@ -0,0 +1,14 @@
+{
+  "testcases": {
+    "b856d760-023d-4b00-bad2-15d2b6da22fe": {
+      "action": "gcm_decrypt",
+"arguments": {
+"algorithm": "aes128",
+"nonce": "4gF+BtR3ku/PUQci",
+"key": "Xjq/GkpTSWoe3ZH0F+tjrQ==",
+"ciphertext": "ET3RmvH/Hbuxba63EuPRrw==",
+"ad": "QUQtRGF0ZW4=",
+"tag": "Mp0APJb/ZIURRwQlMgNN/w=="
+}    }
+  }
+}

test_json/gcm_decrypt_sea.json

@@ -0,0 +1,14 @@
+{
+  "testcases": {
+    "b856d760-023d-4b00-bad2-15d2b6da22fe": {
+      "action": "gcm_decrypt",
+"arguments": {
+"algorithm": "sea128",
+"nonce": "4gF+BtR3ku/PUQci",
+"key": "Xjq/GkpTSWoe3ZH0F+tjrQ==",
+"ciphertext": "0cI/Wg4R3URfrVFZ0hw/vg==",
+"ad": "QUQtRGF0ZW4=",
+"tag": "ysDdzOSnqLH0MQ+Mkb23gw=="
+}    }
+  }
+}

test_json/gcm_encrypt.json

@@ -0,0 +1,14 @@
+{
+  "testcases": {
+    "b856d760-023d-4b00-bad2-15d2b6da22fe": {
+      "action": "gcm_encrypt",
+      "arguments": {
+        "algorithm": "aes128",
+        "nonce": "4gF+BtR3ku/PUQci",
+        "key": "Xjq/GkpTSWoe3ZH0F+tjrQ==",
+        "plaintext": "RGFzIGlzdCBlaW4gVGVzdA==",
+        "ad": "QUQtRGF0ZW4="
+      }
+    }
+  }
+}

test_json/gcm_encrypt_sea.json

@@ -0,0 +1,14 @@
+{
+  "testcases": {
+    "b856d760-023d-4b00-bad2-15d2b6da22fe": {
+      "action": "gcm_encrypt",
+      "arguments": {
+"algorithm": "sea128",
+"nonce": "4gF+BtR3ku/PUQci",
+"key": "Xjq/GkpTSWoe3ZH0F+tjrQ==",
+"plaintext": "RGFzIGlzdCBlaW4gVGVzdA==",
+"ad": "QUQtRGF0ZW4="
+}
+    }
+  }
+}

test_json/pfmath_tests.json

@@ -0,0 +1,98 @@
+{
+  "testcases": {
+    "gfpoly_add": {
+      "action": "gfpoly_add",
+      "arguments": {
+        "A": [
+          "NeverGonnaGiveYouUpAAA==",
+          "NeverGonnaLetYouDownAA==",
+          "NeverGonnaRunAroundAAA==",
+          "AndDesertYouAAAAAAAAAA=="
+        ],
+        "B": [
+          "KryptoanalyseAAAAAAAAA==",
+          "DHBWMannheimAAAAAAAAAA=="
+        ]
+      }
+    },
+    "gfpoly_mul": {
+      "action": "gfpoly_mul",
+      "arguments": {
+        "A": [
+          "JAAAAAAAAAAAAAAAAAAAAA==",
+          "wAAAAAAAAAAAAAAAAAAAAA==",
+          "ACAAAAAAAAAAAAAAAAAAAA=="
+        ],
+        "B": [
+          "0AAAAAAAAAAAAAAAAAAAAA==",
+          "IQAAAAAAAAAAAAAAAAAAAA=="
+        ]
+      }
+    },
+    "gfpoly_mul_10": {
+      "action": "gfpoly_mul",
+      "arguments": {
+        "A": [
+          "JAAAAAAAAAAAAAAAAAAAAA==",
+          "wAAAAAAAAAAAAAAAAAAAAA==",
+          "ACAAAAAAAAAAAAAAAAAAAA=="
+        ],
+        "B": [
+          "AAAAAAAAAAAAAAAAAAAAAA=="
+        ]
+      }
+    },
+    "gfpoly_mul_01": {
+      "action": "gfpoly_mul",
+      "arguments": {
+        "A": [
+          "AAAAAAAAAAAAAAAAAAAAAA=="
+        ],
+        "B": [
+          "0AAAAAAAAAAAAAAAAAAAAA==",
+          "IQAAAAAAAAAAAAAAAAAAAA=="
+        ]
+      }
+    },
+    "gfpoly_pow": {
+      "action": "gfpoly_pow",
+      "arguments": {
+        "A": [
+          "JAAAAAAAAAAAAAAAAAAAAA==",
+          "wAAAAAAAAAAAAAAAAAAAAA==",
+          "ACAAAAAAAAAAAAAAAAAAAA=="
+        ],
+        "k": 3
+      }
+    },
+    "gfpoly_pow_k0": {
+      "action": "gfpoly_pow",
+      "arguments": {
+        "A": [
+          "JAAAAAAAAAAAAAAAAAAAAA==",
+          "wAAAAAAAAAAAAAAAAAAAAA==",
+          "ACAAAAAAAAAAAAAAAAAAAA=="
+        ],
+        "k": 0
+      }
+    },
+    "gfpoly_pow_k1": {
+      "action": "gfpoly_pow",
+      "arguments": {
+        "A": [
+          "JAAAAAAAAAAAAAAAAAAAAA==",
+          "wAAAAAAAAAAAAAAAAAAAAA==",
+          "ACAAAAAAAAAAAAAAAAAAAA=="
+        ],
+        "k": 1
+      }
+    },
+    "gfdiv": {
+      "action": "gfdiv",
+      "arguments": {
+        "a": "JAAAAAAAAAAAAAAAAAAAAA==",
+        "b": "wAAAAAAAAAAAAAAAAAAAAA=="
+      }
+    }
+  }
+}

test_json/poly_algs.json

@@ -0,0 +1,29 @@
+{
+  "testcases": {
+    "b856d760-023d-4b00-bad2-15d2b6da22fe": {
+
+"action": "gfpoly_sort",
+"arguments": {
+"polys": [
+[
+"NeverGonnaGiveYouUpAAA==",
+"NeverGonnaLetYouDownAA==",
+"NeverGonnaRunAroundAAA==",
+"AndDesertYouAAAAAAAAAA=="
+],
+[
+"WereNoStrangersToLoveA==",
+"YouKnowTheRulesAAAAAAA==",
+"AndSoDoIAAAAAAAAAAAAAA=="
+],
+[
+"NeverGonnaMakeYouCryAA==",
+"NeverGonnaSayGoodbyeAA==",
+"NeverGonnaTellALieAAAA==",
+"AndHurtYouAAAAAAAAAAAA=="
+]
+]
+}
+}
+  }
+}

test_json/sandbox.json

@@ -0,0 +1,29 @@
+{
+    "testcases": {
+        "gcm_crack1": {
+            "action": "gcm_crack",
+            "arguments": {
+                "nonce": "4gF+BtR3ku/PUQci",
+                "m1": {
+                    "ciphertext": "CGOkZDnJEt24aVV8mqQq+P4pouVDWhAYj0SN5MDAgg==",
+                    "associated_data": "TmFjaHJpY2h0IDE=",
+                    "tag": "GC9neV3aZLnmznTIWqCC4A=="
+                },
+                "m2": {
+                    "ciphertext": "FnWyLSTfRrO8Y1MuhLIs6A==",
+                    "associated_data": "",
+                    "tag": "gb2ph1vzwU85/FsUg51t3Q=="
+                },
+                "m3": {
+                    "ciphertext": "CGOkZDnJEt25aV58iaMt6O8+8chKVh0Eg1XFxA==",
+                    "associated_data": "TmFjaHJpY2h0IDM=",
+                    "tag": "+/aDjsAzTseDLuM4jt5Q6Q=="
+                },
+                "forgery": {
+                    "ciphertext": "AXe/ZQ==",
+                    "associated_data": ""
+                }
+            }
+        }
+    }
+}