public IActionResult TriggerFingerprint()
{
// Description: Using for DEBUG. URL: https://lifeblocks.site/home/testfingerprintbutton
ViewBag.DoctorName = HttpContext.Session.GetString(Globals.currentUserName);
// Retrieve the Public IP of the Client Computer using the browser
var ip = HttpContext.Connection.RemoteIpAddress;
string ipAddress = ip.ToString();
bool debug = true; // true for DEBUG
string status = "entered function";
TcpClient tcpClient = new TcpClient();
List <Image> fpList = FingerprintService.authenticateFP("24.84.225.22", 3);
// Do fingerprint fetch from windows service here
Image fpImg = null;
for (int i = 0; i < fpList.Count; i++)
{
var debugByte = FingerprintService.imgToByte(fpList[i]);
fpImg = FingerprintService.byteToImg(debugByte);
fpImg.Save(i.ToString() + ".bmp");
}
// Write the Public IP of the client computer on the window
var model = new TestFingerprintButton()
{
message = status
};
return(RedirectToAction("TestFingerprintButton", model));
}
public IActionResult RequestAccess(RequestAccessViewModel requestAccessViewModel)
{
// Description: Authenticates a patient's identity when a Doctor requests access to their medical information
// Get's the Doctor's information for current session
ViewBag.DoctorName = HttpContext.Session.GetString(Globals.currentUserName);
if (!ModelState.IsValid)
{
return(View(requestAccessViewModel));
}
string PHN = HttpContext.Session.GetString(Globals.currentPPHN);
string patientSignPublicKey = HttpContext.Session.GetString(Globals.currentPSPubK);
string doctorSignPrivatekey = HttpContext.Session.GetString(Globals.currentDSPriK);
string doctorSignPublicKey = EncryptionService.getSignPublicKeyStringFromPrivate(doctorSignPrivatekey);
string doctorAgreePrivatekey = HttpContext.Session.GetString(Globals.currentDAPriK);
string doctorAgreePublicKey = EncryptionService.getAgreePublicKeyStringFromPrivate(doctorAgreePrivatekey);
string keyword = requestAccessViewModel.keyword;
// Searches for a patient with the specified PHN
Assets <UserCredAssetData> userAsset = _bigChainDbService.GetUserAssetFromTypeID(AssetType.Patient, PHN);
if (userAsset == null)
{
ModelState.AddModelError("", "Could not find a patient profile with PHN: " + PHN);
return(View(requestAccessViewModel));
}
// Decrypt the patient's fingerprint data stored in the Blockchain
byte[] dbFpData = null;
string patientSignPrivateKey, patientAgreePrivateKey;
List <string> dbList = userAsset.data.Data.FingerprintData;
List <Image> dbfpList = new List <Image>();
try
{
foreach (string db in dbList)
{
EncryptionService.decryptFingerprintData(PHN, keyword, db, out dbFpData);
dbfpList.Add(FingerprintService.byteToImg(dbFpData));
}
EncryptionService.getPrivateKeyFromIDKeyword(PHN, keyword, userAsset.data.Data.PrivateKeys, out patientSignPrivateKey, out patientAgreePrivateKey);
}
catch
{
ModelState.AddModelError("", "Keyword may be incorrect");
return(View(requestAccessViewModel));
}
// Send request to the Client Computer to authenticate with fingerprint
int numScans = 1;
List <Image> fpList = FingerprintService.authenticateFP("24.84.225.22", numScans); // DEBUG: Jacob's Computer
// Check if fingerprint data is valid
if (fpList.Count < numScans)
{
ModelState.AddModelError("", "Something went wrong with the fingerprint scan, try again.");
return(View(requestAccessViewModel));
}
Image fpImg = fpList[0];
// Compare the scanned fingerprint with the one saved in the database
if (!FingerprintService.compareFP(fpImg, dbfpList))
{
ModelState.AddModelError("", "The fingerprint did not match, try again.");
return(View(requestAccessViewModel));
}
// Choose the types of records we want to get
AssetType[] typeList = { AssetType.TestRequisition };
var recordList = _bigChainDbService.GetAllTypeRecordsFromPPublicKey <string>
(typeList, patientSignPublicKey);
foreach (var record in recordList)
{
MetaDataSaved <object> metadata = record.metadata;
if (!metadata.AccessList.Keys.Contains(doctorSignPublicKey))
{
var hashedKey = metadata.AccessList[patientSignPublicKey];
var dataDecryptionKey = EncryptionService.getDecryptedEncryptionKey(hashedKey, patientAgreePrivateKey);
var newHash = EncryptionService.getEncryptedEncryptionKey(dataDecryptionKey, patientAgreePrivateKey, doctorAgreePublicKey);
metadata.AccessList[doctorSignPublicKey] = newHash;
_bigChainDbService.SendTransferTransactionToDataBase(record.id, metadata,
patientSignPrivateKey, patientSignPublicKey, record.transID);
}
}
return(RedirectToAction("PatientRecords"));
}
public IActionResult PatientSignUp(PatientSignUpViewModel patientSignUpViewModel)
{
// Description: Registers a patient up for a MedNet account
ViewBag.DoctorName = HttpContext.Session.GetString(Globals.currentUserName);
string signPrivateKey = null, agreePrivateKey = null, signPublicKey = null, agreePublicKey = null;
Assets <PatientCredAssetData> userAsset = _bigChainDbService.GetPatientAssetFromID(patientSignUpViewModel.PHN);
// Check if PHN is already in use
if (userAsset != null)
{
ModelState.AddModelError("", "A Patient profile with that PHN already exists");
return(View(patientSignUpViewModel));
}
// Register fingerprint information
int numScans = 5;
List <Image> fpList = FingerprintService.authenticateFP("24.84.225.22", numScans);
List <byte[]> fpdb = new List <byte[]>();
if (fpList.Count > numScans)
{
ModelState.AddModelError("", "Something went wrong with the fingerprint scan, try again.");
return(View(patientSignUpViewModel));
}
// Parse the input data for user registration
var passphrase = patientSignUpViewModel.KeyWord;
var password = patientSignUpViewModel.Password;
// Encrypt fingerprint data
List <string> encrList = new List <string>();
foreach (var fp in fpList)
{
byte[] fpByte = FingerprintService.imgToByte(fp);
string encrStr = EncryptionService.encryptFingerprintData(patientSignUpViewModel.PHN, passphrase, fpByte);
encrList.Add(encrStr);
}
// Create a user for the Blockchain
EncryptionService.getNewBlockchainUser(out signPrivateKey, out signPublicKey, out agreePrivateKey, out agreePublicKey);
// Create the user Asset
var userAssetData = new PatientCredAssetData
{
ID = patientSignUpViewModel.PHN,
DateOfBirth = patientSignUpViewModel.DateOfBirth,
PrivateKeys = EncryptionService.encryptPrivateKeys(patientSignUpViewModel.PHN, passphrase, signPrivateKey, agreePrivateKey),
DateOfRecord = DateTime.Now,
SignPublicKey = signPublicKey,
AgreePublicKey = agreePublicKey,
FingerprintData = encrList,
};
// Encrypt the user's password in the metadata
var userMetadata = new PatientCredMetadata
{
FirstName = patientSignUpViewModel.FirstName,
LastName = patientSignUpViewModel.LastName,
Email = patientSignUpViewModel.Email,
hashedPassword = EncryptionService.hashPassword(password)
};
// Save the user Asset and Metadata
var asset = new AssetSaved <PatientCredAssetData>
{
Type = AssetType.Patient,
Data = userAssetData,
RandomId = _random.Next(0, 100000)
};
var metadata = new MetaDataSaved <PatientCredMetadata>
{
data = userMetadata
};
// Send the user's information to the Blockchain database
_bigChainDbService.SendCreateTransactionToDataBase(asset, metadata, signPrivateKey);
return(RedirectToAction("PatientLookUp"));
}
public IActionResult FillPrescription(FillPrescriptionViewModel fillPrescriptionViewModel)
{
// Get's the Doctor's information for current session
ViewBag.DoctorName = HttpContext.Session.GetString(Globals.currentUserName);
var oldViewModel = JsonConvert.DeserializeObject <FillPrescriptionViewModel>(TempData["viewModel"] as string);
fillPrescriptionViewModel.PrescriptionData = oldViewModel.PrescriptionData;
fillPrescriptionViewModel.PatientAsset = oldViewModel.PatientAsset;
fillPrescriptionViewModel.PatientMetadata = oldViewModel.PatientMetadata;
TempData["viewModel"] = JsonConvert.SerializeObject(fillPrescriptionViewModel);
if (!ModelState.IsValid)
{
return(View(fillPrescriptionViewModel));
}
string PHN = HttpContext.Session.GetString(Globals.currentPPHN);
string patientSignPublicKey = HttpContext.Session.GetString(Globals.currentPSPubK);
string keyword = fillPrescriptionViewModel.PatientKeyword;
// Searches for a patient with the specified PHN
Assets <UserCredAssetData> userAsset = _bigChainDbService.GetUserAssetFromTypeID(AssetType.Patient, PHN);
if (userAsset == null)
{
ModelState.AddModelError("", "Could not find a patient profile with PHN: " + PHN);
return(View(fillPrescriptionViewModel));
}
// Send request to the Client Computer to authenticate with fingerprint
int numScans = 1;
List <Image> fpList = FingerprintService.authenticateFP("24.84.225.22", numScans); // DEBUG: Jacob's Computer
// Check if fingerprint data is valid
if (fpList.Count < numScans)
{
ModelState.AddModelError("", "Something went wrong with the fingerprint scan, try again.");
return(View(fillPrescriptionViewModel));
}
Image fpImg = fpList[0];
// Decrypt the patient's fingerprint data stored in the Blockchain
byte[] dbFpData = null;
string patientSignPrivateKey, patientAgreePrivateKey;
List <string> dbList = userAsset.data.Data.FingerprintData;
List <Image> dbfpList = new List <Image>();
try
{
foreach (string db in dbList)
{
EncryptionService.decryptFingerprintData(PHN, keyword, db, out dbFpData);
dbfpList.Add(FingerprintService.byteToImg(dbFpData));
}
EncryptionService.getPrivateKeyFromIDKeyword(PHN, keyword, userAsset.data.Data.PrivateKeys, out patientSignPrivateKey, out patientAgreePrivateKey);
}
catch
{
ModelState.AddModelError("", "Keyword may be incorrect");
return(View(fillPrescriptionViewModel));
}
// Compare the scanned fingerprint with the one saved in the database
if (!FingerprintService.compareFP(fpImg, dbfpList))
{
ModelState.AddModelError("", "The fingerprint did not match, try again.");
return(View(fillPrescriptionViewModel));
}
var prescriptionData = _bigChainDbService.GetMetaDataAndAssetFromTransactionId <string, PrescriptionMetadata>
(fillPrescriptionViewModel.PrescriptionData.transID);
var oldMetadata = prescriptionData.metadata;
if (fillPrescriptionViewModel.PrescriptionData.assetData.EndDate.CompareTo(DateTime.Now) < 0)
{
ModelState.AddModelError("", "The Prescription seems to have expired. Cannot fill this prescription.");
return(View(fillPrescriptionViewModel));
}
if (fillPrescriptionViewModel.PrescriptionData.Metadata.RefillRemaining < fillPrescriptionViewModel.QtyFilled)
{
ModelState.AddModelError("", "Connot issue more than remaining refills.");
}
MetaDataSaved <PrescriptionMetadata> newMetadata = oldMetadata;
newMetadata.data.LastIssueQty = fillPrescriptionViewModel.QtyFilled;
newMetadata.data.LastIssueDate = DateTime.Now;
newMetadata.data.RefillRemaining = fillPrescriptionViewModel.PrescriptionData.Metadata.RefillRemaining - fillPrescriptionViewModel.QtyFilled;
_bigChainDbService.SendTransferTransactionToDataBase <PrescriptionMetadata>(fillPrescriptionViewModel.PrescriptionData.assetID,
newMetadata, patientSignPrivateKey, patientSignPublicKey, fillPrescriptionViewModel.PrescriptionData.transID);
return(RedirectToAction("PatientRecords"));
}