feat: add ring - eddsa

ring/src/main.rs

@@ -1,8 +1,11 @@
 use ring::{
+    signature::{ KeyPair, Ed25519KeyPair, UnparsedPublicKey, ED25519 },
     hmac, rand, error::Unspecified,
     digest,
 };
 
+const SEED_LEN: usize = 32;
+
 fn main() -> Result<(), Unspecified> {
     {
         println!("{} HHmac {}", "-".repeat(10), "-".repeat(10));
@@ -21,6 +24,17 @@ fn main() -> Result<(), Unspecified> {
         let sha256 = digest::digest(&digest::SHA256, b"hello, world");
         println!("{:?}", sha256);
     }
+    {
+        println!("{} EdDSA  {}", "-".repeat(10), "-".repeat(10));
+        let rng = rand::SystemRandom::new();
+        let seed: [u8; SEED_LEN] = rand::generate(&rng)?.expose();
+        let key_pair = Ed25519KeyPair::from_seed_unchecked(&seed)?;
+        let sig = key_pair.sign(&"hello world".as_bytes());
+        println!("{}", hex::encode(sig.as_ref()));
+        let public_key = key_pair.public_key().as_ref();
+        let verify_result = UnparsedPublicKey::new(&ED25519, &public_key).verify(&"hello world".as_bytes(), sig.as_ref());
+        println!("verify: {}", verify_result.is_ok());
+    }
 
     Ok(())
 }