tidy

Cargo.lock

@@ -255,6 +255,7 @@ dependencies = [
  "ark-std",
  "blake2",
  "digest",
+ "hex",
  "rand",
  "rand_core",
  "sha2",

Cargo.toml

@@ -1,17 +1,18 @@
 [package]
 edition = "2021"
 name = "arkeddsa"
+rust-version = "1.75.0"
 version = "0.1.0"
 
 [dependencies]
 
 ark-crypto-primitives = {version = "^0.4.0", default-features = false, features = ["sponge", "crh"]}
-ark-ec = "0.4"
+ark-ec = "^0.4.0"
 ark-ed-on-bn254 = {version = "0.4.0"}
-ark-ff = "0.4"
-ark-serialize = "0.4"
-ark-std = "0.4"
-digest = "0.10.7"
+ark-ff = "^0.4.0"
+ark-serialize = {version = "^0.4.0", default-features = false}
+ark-std = "^0.4.0"
+digest = "0.10"
 rand = "0.8"
 rand_core = {version = "0.6", default-features = false}
 
@@ -19,8 +20,9 @@ rand_core = {version = "0.6", default-features = false}
 ark-algebra-test-templates = "0.4.2"
 ark-ed-on-bls12-381 = {version = "0.4.0"}
 ark-ed-on-bls12-381-bandersnatch = {version = "0.4.0"}
-blake2 = "0.10.6"
-sha2 = "0.10.8"
+blake2 = "0.10"
+hex = "0.4.3"
+sha2 = "0.10"
 
 [features]
 default = []

rust-toolchain

@@ -0,0 +1 @@
+1.75.0

src/ed_on_bn254_twist.rs

@@ -6,6 +6,10 @@ use ark_ff::MontFp;
 pub type EdwardsAffine = Affine<EdwardsConfig>;
 pub type EdwardsProjective = Projective<EdwardsConfig>;
 
+pub use ark_ed_on_bn254::{Fq, Fr};
+pub type BaseField = ark_ed_on_bn254::Fq;
+pub type ScalarField = ark_ed_on_bn254::Fr;
+
 /// Twist of `Baby-JubJub` is a twist of twisted Edwards curve. These curves have equations of the
 /// form: ax² + y² = 1 + dx²y².
 /// over some base finite field BaseField.
@@ -18,27 +22,27 @@ pub struct EdwardsConfig;
 ark_algebra_test_templates::test_group!(te; EdwardsProjective; te);
 
 impl CurveConfig for EdwardsConfig {
-    type BaseField = ark_ed_on_bn254::Fq;
-    type ScalarField = ark_ed_on_bn254::Fr;
+    type BaseField = BaseField;
+    type ScalarField = ScalarField;
 
     /// COFACTOR = 8
     const COFACTOR: &'static [u64] = &[8];
 
     /// COFACTOR^(-1) mod r =
     /// 2394026564107420727433200628387514462817212225638746351800188703329891451411
-    const COFACTOR_INV: ark_ed_on_bn254::Fr =
+    const COFACTOR_INV: ScalarField =
         MontFp!("2394026564107420727433200628387514462817212225638746351800188703329891451411");
 }
 
 impl TECurveConfig for EdwardsConfig {
-    const COEFF_A: ark_ed_on_bn254::Fq = MontFp!("168700");
+    const COEFF_A: BaseField = MontFp!("168700");
 
     #[inline(always)]
     fn mul_by_a(elem: Self::BaseField) -> Self::BaseField {
         elem * <Self as TECurveConfig>::COEFF_A
     }
 
-    const COEFF_D: ark_ed_on_bn254::Fq = MontFp!("168696");
+    const COEFF_D: BaseField = MontFp!("168696");
 
     const GENERATOR: EdwardsAffine = EdwardsAffine::new_unchecked(GENERATOR_X, GENERATOR_Y);
 
@@ -47,21 +51,21 @@ impl TECurveConfig for EdwardsConfig {
 
 impl MontCurveConfig for EdwardsConfig {
     /// COEFF_A = 168698
-    const COEFF_A: ark_ed_on_bn254::Fq = MontFp!("168698");
+    const COEFF_A: BaseField = MontFp!("168698");
     /// COEFF_B = 168700
-    const COEFF_B: ark_ed_on_bn254::Fq = MontFp!("1");
+    const COEFF_B: BaseField = MontFp!("1");
 
     type TECurveConfig = EdwardsConfig;
 }
 
 /// GENERATOR_X =
 /// 19698561148652590122159747500897617769866003486955115824547446575314762165298
-pub const GENERATOR_X: ark_ed_on_bn254::Fq =
+pub const GENERATOR_X: BaseField =
     MontFp!("5299619240641551281634865583518297030282874472190772894086521144482721001553");
 
 /// GENERATOR_Y =
 /// 19298250018296453272277890825869354524455968081175474282777126169995084727839
-pub const GENERATOR_Y: ark_ed_on_bn254::Fq =
+pub const GENERATOR_Y: BaseField =
     MontFp!("16950150798460657717958625567821834550301663161624707787222815936182638968203");
 
 #[test]
@@ -77,7 +81,7 @@ fn test_twist() {
 
     fn untwist(curve: EdwardsAffine) -> ark_ed_on_bn254::EdwardsAffine {
         use ark_ff::Field;
-        const A: ark_ed_on_bn254::Fq = MontFp!("168700");
+        const A: BaseField = MontFp!("168700");
         let sqrt_a = A.sqrt().unwrap();
         ark_ed_on_bn254::EdwardsAffine {
             x: curve.x * sqrt_a,
@@ -86,7 +90,6 @@ fn test_twist() {
     }
 
     use ark_ec::{AffineRepr, CurveGroup};
-    use ark_ed_on_bn254::Fr;
     use ark_std::UniformRand;
     use rand_core::OsRng;
 

src/eddsa.rs

@@ -29,6 +29,14 @@ impl SecretKey {
         let x = prune_buffer(buffer);
         (x, hash_prefix)
     }
+
+    pub fn to_bytes(&self) -> [u8; 32] {
+        self.0
+    }
+
+    pub fn from_bytes(bytes: [u8; 32]) -> Self {
+        Self(bytes)
+    }
 }
 
 #[derive(Copy, Clone, Debug)]
@@ -37,6 +45,15 @@ pub struct PublicKey(A)
 where
     A::Config: TECurveConfig;
 
+impl<A: AffineRepr> PublicKey<A>
+where
+    A::Config: TECurveConfig,
+{
+    pub fn xy(&self) -> (&A::BaseField, &A::BaseField) {
+        self.0.xy().unwrap()
+    }
+}
+
 #[derive(Copy, Clone, Debug)]
 /// `SigningKey` produces EdDSA signatures for given message
 pub struct SigningKey<A: AffineRepr>
@@ -73,8 +90,8 @@ where
         Self::new::<D>(&secret_key)
     }
 
-    pub fn public_key(&self) -> PublicKey<A> {
-        self.public_key
+    pub fn public_key(&self) -> &PublicKey<A> {
+        &self.public_key
     }
 
     pub fn sign<D: Digest, E: Absorb>(

src/lib.rs

@@ -1,6 +1,5 @@
 pub mod ed_on_bn254_twist;
 pub mod eddsa;
-pub mod poseidon;
 pub mod signature;
 
 use ark_ff::PrimeField;
@@ -21,20 +20,38 @@ pub enum Error {
 
 #[cfg(test)]
 mod test {
+
+    use crate::SigningKey;
+    use ark_crypto_primitives::sponge::poseidon::{find_poseidon_ark_and_mds, PoseidonConfig};
     use ark_crypto_primitives::sponge::Absorb;
     use ark_ec::{twisted_edwards::TECurveConfig, AffineRepr};
     use ark_ff::PrimeField;
     use digest::Digest;
     use rand_core::OsRng;
 
-    use crate::SigningKey;
+    /// Generates poseidon constants and returns the config
+    pub fn poseidon_config<F: PrimeField>(
+        rate: usize,
+        full_rounds: usize,
+        partial_rounds: usize,
+    ) -> PoseidonConfig<F> {
+        let prime_bits = F::MODULUS_BIT_SIZE as u64;
+        let (ark, mds) = find_poseidon_ark_and_mds(
+            prime_bits,
+            rate,
+            full_rounds as u64,
+            partial_rounds as u64,
+            0,
+        );
+        PoseidonConfig::new(full_rounds, partial_rounds, 5, mds, ark, rate, 1)
+    }
 
     fn run_test<A: AffineRepr, D: Digest>()
     where
         A::BaseField: Absorb + PrimeField,
         A::Config: TECurveConfig,
     {
-        let poseidon = crate::poseidon::poseidon_config(4, 8, 55);
+        let poseidon = poseidon_config(4, 8, 55);
         let signing_key = SigningKey::<A>::generate::<D>(&mut OsRng).unwrap();
         let message = b"xxx yyy <<< zzz >>> bunny";
         let signature = signing_key.sign::<D, _>(&poseidon, &message[..]);

src/poseidon.rs

@@ -1,19 +0,0 @@
-use ark_crypto_primitives::sponge::poseidon::{find_poseidon_ark_and_mds, PoseidonConfig};
-use ark_ff::PrimeField;
-
-/// Generates poseidon constants and returns the config
-pub fn poseidon_config<F: PrimeField>(
-    rate: usize,
-    full_rounds: usize,
-    partial_rounds: usize,
-) -> PoseidonConfig<F> {
-    let prime_bits = F::MODULUS_BIT_SIZE as u64;
-    let (ark, mds) = find_poseidon_ark_and_mds(
-        prime_bits,
-        rate,
-        full_rounds as u64,
-        partial_rounds as u64,
-        0,
-    );
-    PoseidonConfig::new(full_rounds, partial_rounds, 5, mds, ark, rate, 1)
-}