public JObject Register(JObject json)
{
var user = json["fields"].ToObject <User>();
json = Validate(json);
if (json.ContainsKey("invalidFields"))
{
return(json);
}
user.PublicKey = CryptographyService.GetPublicKeyFromPrivate(user.PrivateKey);
user.PrivateKey = null; // since the service lies on blockchain, private keys must not be stored
user.Enabled = true;
user.CorrespondingIndices = new Dictionary <string, string>();
// For now, the newly created user is considered to belong to the demo company created during initialization.
if (user.Position.Equals("companyVesselsRegistryManager"))
{
user.Company = "1234567890";
}
_usersDataAccess.Insert(user);
json["saved"] = _usersDataAccess.FindByPublicKey(user.PublicKey) != null;
if (!json["saved"].ToObject <bool>())
{
return(json);
}
json["token"] = GenerateToken(user);
return(json);
}
public JObject Insert(JObject json, string privateKey)
{
json = Validate(json);
if (json.ContainsKey("invalidFields"))
{
return(json);
}
var vessel = json.ToObject <Vessel>();
vessel.Company = _usersDataAccess.FindByPublicKey(CryptographyService.GetPublicKeyFromPrivate(privateKey)).Company;
try
{
_vesselsDataAccess.Insert(vessel);
var company = _companiesDataAccess.FindByRegistryNumber(vessel.Company);
var vessels = company.Vessels;
vessels.AddLast(vessel.Id);
company.Vessels = vessels;
_companiesDataAccess.Update(company);
json["saved"] = true;
return(json);
}
catch (Exception e)
{
Console.WriteLine(e);
json["saved"] = false;
json["errorDetails"] = e.Message;
return(json);
}
}
// Creates, encrypts and saves a new contract in the database as block
// Currently not used - implementation pending
public void ConcludeContract(Contract contract)
{
// Parse contract into json string
var jsonToString = JsonConvert.SerializeObject(contract);
// Encrypt string
var encryptedData = CryptographyService.Encrypt(jsonToString);
var encryptedContract = encryptedData[0];
var secretKey = encryptedData[1];
// Save block in the database
var lastBlock = _blockchainDataAccess.FindLast();
var lastBlockIndex = lastBlock.Index;
var lastBlockHash = lastBlock.Hash;
var newBlockIndex = (Convert.ToInt64(lastBlockIndex) + 1).ToString();
_blockchainDataAccess.Insert(new Block(newBlockIndex, encryptedContract, lastBlockHash));
// Encrypt and send the secret key to all users included in the contract
var signatures = (List <dynamic>)contract.Essentials["signatures"];
foreach (var signature in signatures.Select(hashMap => (Dictionary <string, dynamic>)hashMap))
{
foreach (var(key, value) in signature)
{
if (!key.Equals("signer") && !key.Equals("onBehalfOf"))
{
continue;
}
var encryptedSecret = CryptographyService.EncryptWithPublicKey(secretKey, (string)value);
var userToBeUpdated = _usersDataAccess.FindByPublicKey((string)value);
var userCorrespondingIndices = userToBeUpdated.CorrespondingIndices;
userCorrespondingIndices[newBlockIndex] = encryptedSecret;
_usersDataAccess.Update(userToBeUpdated);
}
}
}