WebAuthn tests -WIP-

client.js

function pkCcreate(){
  var publicKey = {
    challenge: new Uint8Array([10,32,47,4,13,3,37,11,13,47,18,46,6,51,11,27,13,25,42,25,19,36,35,0,17,46]),
    rp: {
      name: "Example CORP",
      id  : "localhost"
    },
    user: {
      id: new Uint8Array(26),
      name: "jdoe@example.com",
      displayName: "John Doe",
    },
    pubKeyCredParams: [
      {
        type: "public-key",
        alg: -7
      }
    ]
  };

  navigator.credentials.create({ publicKey })
    .then(function (newCredentialInfo) {
    // send attestation response and client extensions
    // to the server to proceed with the registration
    // of the credential
      const txDecoder = new TextDecoder("utf-8");

      
      console.log("cred properties");
      console.log("type", newCredentialInfo.type);
      console.log("id", newCredentialInfo.id);
      console.log("rawId", newCredentialInfo.rawId);
      const response = newCredentialInfo.response;
      console.log("cred.response properties");
      if(newCredentialInfo.response.getTransports){
        console.log("getTransports() is there");
        console.log("transports are:",response.getTransports());
      }
      console.log("attestationResponse.clientDataJSON", JSON.parse(txDecoder.decode(response.clientDataJSON)));
      console.log("cred.response.attestationObject");
      var attestationObject = CBOR.decode(response.attestationObject);
      console.log("fmt", attestationObject.fmt);
      console.log("attStmt", attestationObject.attStmt);

      // flags
  
      console.log("flags");
      var offset = attestationObject.authData.byteOffset;
      var currentOffset = 0;
      var sizeHash = 32;
      var rpIdHash = attestationObject.authData.slice(currentOffset,(currentOffset += sizeHash));
      var shaHash = "".concat(...Array.from(rpIdHash).map(e => e.toString(16)));
      console.log("rpIdHash is: ",shaHash);
      var sizeFlag = 1;
      var flagsNumber = attestationObject.authData.slice(currentOffset,(currentOffset += sizeFlag))[0];
      var flagsArray = flagsNumber.toString(2).split("").reverse();
      console.table(flagsArray);
      var sizeCounter = 4;
      var counter = (new DataView(attestationObject.authData.buffer, currentOffset + offset, sizeCounter)).getInt32();
      currentOffset += sizeCounter;
      console.log("signCount is:", counter);
      var sizeAaguid = 16;
      var aaguid = attestationObject.authData.slice(currentOffset,currentOffset += sizeAaguid);
      var strAaguid = "".concat(...Array.from(aaguid).map(e => e.toString(16).padStart(2,"0")));
      console.log("aaguid", strAaguid)
      var sizeSizeCred = 2;
      var sizeCred = (new DataView(attestationObject.authData.buffer, currentOffset + offset, sizeSizeCred)).getInt16();
      currentOffset += sizeSizeCred;
      console.log("credIdLength", sizeCred);

      var credentialId = attestationObject.authData.slice(currentOffset, (currentOffset += sizeCred));
      var strCredentialId = "".concat(...Array.from(credentialId).map(e => e.toString(16).padStart(2,"0")));
      console.log("credentialId",strCredentialId);

      var credPK = CBOR.decode(attestationObject.authData.buffer.slice(offset + currentOffset));
      console.log(credPK);
      // var cose =   
      // // Does Chrome support extensions ?

    }).catch(function (err) {
      console.error(err);
    });
}