/// <summary>
/// Initial when user login + create token key to verify
/// </summary>
/// <param name="_key">Key generated and add to block</param>
/// <param name="_username">User username</param>
/// <returns>Redirect to Candidates view + token key</returns>
public ActionResult create_BC(string _key, string _username)
{
var user = db.Users.FirstOrDefault(x => x.Username.Equals(_username));
var block = new BlockChainModel();
if (user.Public_key == null)
{
block.initialBlock(_key, user);
}
//Generate a token
Random rnd = new Random();
int _num = rnd.Next(0, 9);
string _token = Membership.GeneratePassword(24, _num);
//Encrypt token and send with random key to AR server
string _keyToken = Guid.NewGuid().ToString("N");
var _encryptToken = TokenModel.encryptToken(_token, _keyToken);
var _encryptKey = TokenModel.CreateKey(Encoding.Unicode.GetBytes(_keyToken)); // 64 bytes
Session["UserSession"] = new UserSession {
Username = _username
};
Session["TokenSession"] = new TokenSession {
Token = _encryptToken, TokenKey = _encryptKey
};
Session["user_TokenSession"] = new UserSession {
Token = _token
};
return(RedirectToAction("Index", "Candidates"));
}
public async Task Set(DocumentId documentId, BlockChainModel blockChainModel, CancellationToken token = default)
{
HttpResponseMessage?response = await _httpClient.PostAsJsonAsync($"api/contract/set/{documentId.ToUrlEncoding()}", blockChainModel, token);
response.VerifyNotNull("Null returned");
response.EnsureSuccessStatusCode();
}
public async Task GivenNoContract_WhenCreated_ShouldVerify()
{
ContractClient client = TestApplication.GetContractClient();
var documentId = new DocumentId("test/unit-tests-smart/contract1");
var query = new QueryParameter()
{
Filter = "test/unit-tests-smart",
Recursive = false,
};
IReadOnlyList <string> search = (await client.Search(query).ReadNext()).Records;
if (search.Any(x => x == (string)documentId))
{
await client.Delete(documentId);
}
var blkHeader = new BlkHeader
{
PrincipalId = "dev/user/[email protected]",
DocumentId = (string)documentId,
Creator = "test",
Description = "test description",
};
await client.Create(blkHeader);
BlockChainModel model = await client.Get(documentId);
model.Should().NotBeNull();
model.Blocks.Should().NotBeNull();
model.Blocks.Count.Should().Be(2);
model.Blocks[0].Should().NotBeNull();
model.Blocks[0].IsValid().Should().BeTrue();
model.Blocks[1].Should().NotBeNull();
model.Blocks[1].IsValid().Should().BeTrue();
model.Blocks[1].DataBlock.Should().NotBeNull();
model.Blocks[1].DataBlock.BlockType.Should().Be(typeof(BlkHeader).Name);
bool isValid = await client.Validate(model);
isValid.Should().BeTrue();
BatchSet <string> searchList = await client.Search(query).ReadNext();
searchList.Should().NotBeNull();
searchList.Records.Any(x => x.EndsWith(documentId.Path)).Should().BeTrue();
(await client.Delete(documentId)).Should().BeTrue();
searchList = await client.Search(query).ReadNext();
searchList.Should().NotBeNull();
searchList.Records.Any(x => x.EndsWith(documentId.Path)).Should().BeFalse();
}
public async Task <IActionResult> Validate([FromBody] BlockChainModel blockChainModel, CancellationToken token)
{
blockChainModel.Verify();
bool isValid = await _contractService.Validate(blockChainModel.ToBlockChain(), token);
return(isValid ? Ok() : Conflict());
}
public async Task Set(DocumentId documentId, BlockChainModel blockChain, CancellationToken token)
{
Document document = new DocumentBuilder()
.SetDocumentId(documentId.WithContainer(_container))
.SetData(blockChain)
.Build();
await _artifactClient.Set(document, token);
}
// GET: Block
#region Index
/// <summary>
/// Decrypt encrypted vote and passing data to blockchain
/// </summary>
/// <param name="_id">Block id</param>
/// <param name="_dataBase64">Encrypted vote</param>
/// <returns>Success vote</returns>
public ActionResult Index(int _id, string _dataBase64)
{
var user = Session["UserSession"] as UserSession;
if (user == null)
{
return(RedirectToAction("Index", "Vote"));
}
if (_dataBase64 == null)
{
return(RedirectToAction("SignIn", "Vote"));
}
else
{
var _data = Convert.FromBase64String(_dataBase64);
var _privKey = Session["PrivateKeySession"] as PrivateKeySession;
var _voteData = VoteModel.RSADecrypt(_data, _privKey.PrivateKey);
var _temp = Session["UserSession"] as UserSession;
var _user = db.Users.SingleOrDefault(x => x.Username.Equals(_temp.Username));
var _block = db.Blocks.SingleOrDefault(x => x.Block_key.Equals(_user.Public_key));
_block.Data = _voteData;
db.Entry(_block).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
var block = new BlockChainModel();
block.isBlock(_user.Public_key, _block.Data, _block.Prev_ID, _block.Block_key);
/////////////
_user.Voted = 1;
db.Entry(_user).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
/////////////
var candidate = db.Blocks.SingleOrDefault(x => x.Block_key == _voteData);
if (candidate != null)
{
if (candidate.Data == null)
{
candidate.Data = "1";
db.Entry(candidate).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
}
else
{
candidate.Data = (int.Parse(candidate.Data) + 1).ToString();
db.Entry(candidate).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
}
}
return(RedirectToAction("VoteSuccess", "Vote"));
}
}
// ////////////////////////////////////////////////////////////////////////////////////////////
// CRUD methods
public async Task <BlockChainModel?> Get(DocumentId documentId, CancellationToken token)
{
Document?document = await _artifactClient.Get(documentId.WithContainer(_container), token);
if (document == null)
{
return(null);
}
BlockChainModel model = document.DeserializeData <BlockChainModel>();
return(model);
}
public ActionResult NewCandidate(AdminModel admin)
{
Block b = new Block()
{
Block_key = admin.Name,
Network = "2"
};
var block = new BlockChainModel();
block.createBlock(b);
return(View("Candidates"));
}
public async Task <IActionResult> Set(string path, [FromBody] BlockChainModel blockChainModel, CancellationToken token)
{
blockChainModel.Verify();
DocumentId documentId = DocumentIdTools.FromUrlEncoding(path);
bool isValid = await _contractService.Validate(blockChainModel.ToBlockChain(), token);
if (!isValid)
{
return(Conflict());
}
await _contractService.Set(documentId, blockChainModel, token);
return(Ok());
}
public async Task <IActionResult> Sign(string path, [FromBody] BlockChainModel blockChainModel, CancellationToken token)
{
blockChainModel.Verify();
BlockChain blockChain = await _contractService.Sign(blockChainModel.ToBlockChain(), token);
if (path == "model")
{
return(Ok(blockChain.ToBlockChainModel()));
}
DocumentId documentId = DocumentIdTools.FromUrlEncoding(path);
await _contractService.Set(documentId, blockChain.ToBlockChainModel(), token);
return(Ok());
}
public async Task GivenBlockChain_WhenFile_WillRoundTrip()
{
ContractClient client = TestApplication.GetContractClient();
var documentId = new DocumentId("test/unit-tests-smart/contract1");
await Delete(documentId, false);
var blkHeader = new BlkHeader
{
PrincipalId = "dev/user/[email protected]",
DocumentId = (string)documentId,
Creator = "test",
Description = "test description",
};
BlockChain blockChain = new BlockChainBuilder()
.SetPrincipleId(blkHeader.PrincipalId)
.Build()
.Add(blkHeader, blkHeader.PrincipalId);
BlockChainModel signedBlockChainModel = await client.Sign(blockChain.ToBlockChainModel());
signedBlockChainModel.Should().NotBeNull();
await client.Set(documentId, signedBlockChainModel);
BlockChainModel readBlockChainModel = await client.Get(documentId);
readBlockChainModel.Should().NotBeNull();
readBlockChainModel.Blocks.Count.Should().Be(signedBlockChainModel.Blocks.Count);
readBlockChainModel.Blocks
.Zip(signedBlockChainModel.Blocks)
.All(x => x.First == x.Second)
.Should().BeTrue();
bool isValid = await client.Validate(documentId);
isValid.Should().BeTrue();
isValid = await client.Validate(readBlockChainModel);
isValid.Should().BeTrue();
await Delete(documentId, true);
}
public ActionResult ReturnBlockChainCalculatedHashNonceAndPrev(BlockChainModel model)
{
int nonce = 0;
string hash = string.Empty;
int diffucultLevel = int.Parse(ConfigurationManager.AppSettings["DifficultyLevel"]);
var zeros = GetHashRateZeros(diffucultLevel);
while (true)
{
hash = Sha256.CreateSha256(model.Data + model.Prev + nonce);
if (hash.Substring(0, diffucultLevel) == zeros)
{
break;
}
nonce += 1;
}
model.Nonce = nonce;
model.Hash = hash;
return(Json(model, JsonRequestBehavior.AllowGet));
}
public async Task GivenBlockChain_WhenSigned_FailedWithWrongSignature()
{
ContractClient client = TestApplication.GetContractClient();
var documentId = new DocumentId("test/unit-tests-smart/contract1");
var blkHeader = new BlkHeader
{
PrincipalId = "dev/user/[email protected]",
DocumentId = (string)documentId,
Creator = "test",
Description = "test description",
};
BlockChain blockChain = new BlockChainBuilder()
.SetPrincipleId(blkHeader.PrincipalId)
.Build()
.Add(blkHeader, blkHeader.PrincipalId);
BlockChainModel signedBlockChainModel = await client.Sign(blockChain.ToBlockChainModel());
signedBlockChainModel.Should().NotBeNull();
bool isValid = await client.Validate(signedBlockChainModel);
// Modify signature
signedBlockChainModel.Blocks[1] = signedBlockChainModel.Blocks[1] with {
DataBlock = signedBlockChainModel.Blocks[1].DataBlock with {
JwtSignature = "junk"
}
};
isValid = await client.Validate(signedBlockChainModel);
isValid.Should().BeFalse();
}
public static BlockChain ToBlockChain(this BlockChainModel blockChainModel)
{
blockChainModel.VerifyNotNull(nameof(blockChainModel));
return(new BlockChain(blockChainModel.Blocks));
}
public static void Verify(this BlockChainModel blockChainModel)
{
blockChainModel.VerifyNotNull(nameof(blockChainModel));
blockChainModel.Blocks.VerifyNotNull(nameof(blockChainModel.Blocks));
blockChainModel.Blocks.ForEach(x => x.Verify());
}