feat: ed25519 sign

crates/anychain-kms/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "anychain-kms"
 description = "A Rust library providing Key Management Schema for AnyChain. Handles general security and signature algorithms."
-version = "0.1.14"
+version = "0.1.15"
 keywords = ["cryptography", "security", "signature", "algorithm"]
 categories = ["cryptography::cryptocurrencies"]
 
@@ -32,6 +32,7 @@ ed25519-dalek = { workspace = true }
 curve25519-dalek = { workspace = true }
 group = "0.13.0"
 encoding = "0.2.33"
+anychain-core = { version = "0.1.7", path = "../anychain-core" }
 
 [dev-dependencies]
 hex-literal = "0.4"

crates/anychain-kms/src/lib.rs

@@ -9,15 +9,26 @@ pub mod bip39;
 pub mod crypto;
 pub mod error;
 
+use anychain_core::crypto::sha256;
+use bip32::PrivateKey;
+use curve25519_dalek::Scalar;
+use ed25519_dalek::ExpandedSecretKey;
 use error::Error;
 
-pub fn ecdsa_sign(
-    secret_key: &libsecp256k1::SecretKey,
-    bytes: &[u8],
-) -> Result<(Vec<u8>, u8), Error> {
-    let message = libsecp256k1::Message::parse_slice(bytes)?;
-    let (signature, recid) = libsecp256k1::sign(&message, secret_key);
-    Ok((signature.serialize().to_vec(), recid.into()))
+pub fn secp256k1_sign(sk: &libsecp256k1::SecretKey, msg: &[u8]) -> Result<(Vec<u8>, u8), Error> {
+    let msg = libsecp256k1::Message::parse_slice(msg)?;
+    let (sig, recid) = libsecp256k1::sign(&msg, sk);
+    Ok((sig.serialize().to_vec(), recid.into()))
+}
+
+pub fn ed25519_sign(sk: &Scalar, msg: &[u8]) -> Result<Vec<u8>, Error> {
+    let sk_bytes = PrivateKey::to_bytes(sk);
+    let nonce = sha256(&sk_bytes).to_vec();
+    let xsk = [sk_bytes, nonce].concat();
+    let xsk = ExpandedSecretKey::from_bytes(&xsk).unwrap();
+    let pk = PrivateKey::public_key(sk);
+    let sig = xsk.sign(msg, &pk).to_bytes().to_vec();
+    Ok(sig)
 }
 
 #[cfg(test)]