ursa 0.1.1-dev-1

This is the shared crypto library for Hyperledger components.
Documentation 
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use wasm_bindgen::prelude::*;

use bls;
use super::convert_from_js;

#[wasm_bindgen]
pub struct Generator(bls::Generator);

#[wasm_bindgen]
impl Generator {
    pub fn new() -> Result<Generator, JsValue> {
        Ok(Generator(maperr!(bls::Generator::new())))
    }

    pub fn as_bytes(&self) -> Vec<u8> {
        self.0.as_bytes().to_vec()
    }

    pub fn from_bytes(bytes: &[u8]) -> Result<Generator, JsValue>  {
        Ok(Generator(maperr!(bls::Generator::from_bytes(bytes))))
    }
}

#[wasm_bindgen]
pub struct SignKey(bls::SignKey);

#[wasm_bindgen]
impl SignKey {
    pub fn new() -> Result<SignKey, JsValue>  {
        Ok(SignKey(maperr!(bls::SignKey::new(None))))
    }

    pub fn from_seed(seed: &[u8]) -> Result<SignKey, JsValue>  {
        Ok(SignKey(maperr!(bls::SignKey::new(Some(seed)))))
    }

    pub fn from_bytes(bytes: &[u8]) -> Result<SignKey, JsValue> {
        Ok(SignKey(maperr!(bls::SignKey::from_bytes(bytes))))
    }

    pub fn to_bytes(&self) -> Result<Vec<u8>, JsValue> {
        Ok(self.0.as_bytes().to_vec())
    }
}

#[wasm_bindgen]
pub struct VerKey(bls::VerKey);

#[wasm_bindgen]
impl VerKey {
    pub fn new(generator: Generator, sign_key: SignKey) -> Result<VerKey, JsValue> {
        Ok(VerKey(maperr!(bls::VerKey::new(&generator.0, &sign_key.0))))
    }

    pub fn from_bytes(bytes: &[u8]) -> Result<VerKey, JsValue> {
        Ok(VerKey(maperr!(bls::VerKey::from_bytes(bytes))))
    }

    pub fn to_bytes(&self) -> Result<Vec<u8>, JsValue> {
        Ok(self.0.as_bytes().to_vec())
    }
}

#[wasm_bindgen]
pub struct ProofOfPossession(bls::ProofOfPossession);

#[wasm_bindgen]
impl ProofOfPossession {
    pub fn new(ver_key: &VerKey, sign_key: &SignKey) -> Result<ProofOfPossession, JsValue> {
        Ok(ProofOfPossession(maperr!(bls::ProofOfPossession::new(&ver_key.0, &sign_key.0))))
    }

    pub fn from_bytes(bytes: &[u8]) -> Result<ProofOfPossession, JsValue> {
        Ok(ProofOfPossession(maperr!(bls::ProofOfPossession::from_bytes(bytes))))
    }

    pub fn as_bytes(&self) -> Result<Vec<u8>, JsValue> {
        Ok(self.0.as_bytes().to_vec())
    }
}

#[wasm_bindgen]
pub struct Signature(bls::Signature);

#[wasm_bindgen]
impl Signature {
    pub fn from_bytes(bytes: &[u8]) -> Result<Signature, JsValue> {
        Ok(Signature(maperr!(bls::Signature::from_bytes(bytes))))
    }
    pub fn as_bytes(&self) -> Result<Vec<u8>, JsValue> {
        Ok(self.0.as_bytes().to_vec())
    }
}

#[wasm_bindgen]
pub struct MultiSignature(bls::MultiSignature);

#[wasm_bindgen]
impl MultiSignature {
    pub fn new(signatures: Vec<JsValue>) -> Result<MultiSignature, JsValue> {
        let sigs: Vec<bls::Signature> = signatures.iter().map(|x| x.into_serde().unwrap()).collect();
        Ok(MultiSignature(bls::MultiSignature::new(sigs.iter().collect::<Vec<_>>().as_slice())?))
    }

    pub fn from_bytes(bytes: &[u8]) -> Result<MultiSignature, JsValue> {
        Ok(MultiSignature(maperr!(bls::MultiSignature::from_bytes(bytes))))
    }

    pub fn as_bytes(&self) -> Result<Vec<u8>, JsValue> {
        Ok(self.0.as_bytes().to_vec())
    }
}

#[wasm_bindgen]
pub struct Bls(bls::Generator);

#[wasm_bindgen]
#[allow(non_snake_case)]
impl Bls {
    pub fn new() -> Bls {
        Bls(bls::Generator::new().unwrap())
    }

//    pub fn keypair() ->

    pub fn sign(message: &[u8], sign_key: &SignKey) -> Result<Signature, JsValue> {
        Ok(Signature(maperr!(bls::Bls::sign(message, &sign_key.0))))
    }

    pub fn verify(message: &[u8], signature: &Signature, ver_key: &VerKey, generator: &Generator) -> Result<bool, JsValue> {
        Ok(maperr!(bls::Bls::verify(&signature.0, message, &ver_key.0, &generator.0)))
    }

    pub fn verifyProofOfPosession(pop: &ProofOfPossession, ver_key: &VerKey, generator: &Generator) -> Result<bool, JsValue> {
        Ok(maperr!(bls::Bls::verify_proof_of_posession(&pop.0, &ver_key.0, &generator.0)))
    }

    pub fn verifyMultiSignature(multi_sig: &MultiSignature, message: &[u8], ver_keys: Vec<JsValue>, gen: &Generator) -> Result<bool, JsValue> {
        let vks: Vec<bls::VerKey> = ver_keys.iter().map(|x| convert_from_js(x).unwrap()).collect();
        Ok(maperr!(bls::Bls::verify_multi_sig(&multi_sig.0, message, vks.iter().collect::<Vec<_>>().as_slice(), &gen.0)))
    }
}