fix keygen

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zkryptium"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 license = "Apache-2.0"
 authors = ["LINKS Foundation"]

README.md

@@ -33,15 +33,15 @@ This library enables the creation of zero-knowledge proofs, exposing cryptograph
 
 ```toml
 [dependencies]
-zkryptium = { version = "0.2.0", default-features = false, features = ["bbsplus"] }
+zkryptium = { version = "0.2.1", default-features = false, features = ["bbsplus"] }
 ```
 
 ##### CL2003:
 - see the **requirements** above
 
 ```toml
 [dependencies]
-zkryptium = { version = "0.2.0", default-features = false, features = ["cl03"] }
+zkryptium = { version = "0.2.1", default-features = false, features = ["cl03"] }
 ```
 
 ### Examples

src/bbsplus/keys.rs

@@ -21,7 +21,7 @@ use crate::{
     },
     schemes::algorithms::BBSplus,
     utils::util::bbsplus_utils::{
-        hash_to_scalar, i2osp, parse_g2_projective_compressed, parse_g2_projective_uncompressed,
+        generate_random_secret, hash_to_scalar, i2osp, parse_g2_projective_compressed, parse_g2_projective_uncompressed
     },
 };
 use bls12_381_plus::{G2Affine, G2Projective, Scalar};
@@ -164,6 +164,27 @@ impl<CS: BbsCiphersuite> KeyPair<BBSplus<CS>> {
             private: BBSplusSecretKey(sk),
         })
     }
+
+    /// # Description
+    /// This operation generates a random keypair (SK, PK)
+    ///
+    /// # Output:
+    /// * a keypair [`KeyPair`]
+    pub fn random() -> Result<Self, Error>
+    where
+        CS::Expander: for<'a> ExpandMsg<'a>,
+    {
+        let key_material = generate_random_secret(64);
+
+        let sk = key_gen::<CS>(&key_material, None, None)?;
+
+        let pk = sk_to_pk(sk);
+
+        Ok(Self {
+            public: BBSplusPublicKey(pk),
+            private: BBSplusSecretKey(sk),
+        })
+    }
 }
 
 /// https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-bbs-signatures-05#name-secret-key -> SK = KeyGen(key_material, key_info, key_dst)