public bool DecryptData(string signed, string msg = "")
{
if (Init())
{
if (_type == 1)
{
//SHA256 sha256Hash = SHA256.Create();
//byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(msg));
byte[] bsigned = StringToByteArray(signed);
byte[] bytes = Encoding.UTF8.GetBytes(msg);
var rsa = RSA.Create();
rsa.KeySize = _keySize;
rsa.ImportSubjectPublicKeyInfo(Convert.FromBase64String(_publicKey), out int byteReads);
var result = rsa.VerifyData(bytes, bsigned, HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
return(result);
}
else
{
PGPLib pgp = new PGPLib();
byte[] bytes = Encoding.UTF8.GetBytes(_publicKey);
var stream = new MemoryStream(bytes);
SignatureCheckResult signatureCheck = pgp.VerifyString(signed, stream, out string plainText);
var result = signatureCheck == SignatureCheckResult.SignatureVerified;
return(result);
}
}
else
{
return(false);
}
}
public string EncryptData(string msg)
{
if (Init())
{
if (_type == 1)
{
SHA256 sha256Hash = SHA256.Create();
byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(msg));
var rsa = RSA.Create();
rsa.KeySize = 1024;
rsa.ImportRSAPrivateKey(Convert.FromBase64String(_privateKey), out int byteReads);
var signed = rsa.SignData(bytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
string result = Convert.ToBase64String(signed);
return(result);
}
else
{
PGPLib pgp = new PGPLib();
var signed = pgp.SignString(msg, new FileInfo(_privateKey), _pgpKeyPassword);
return(signed);
}
}
else
{
return(null);
}
}
public String encrypet(string InputText, string path, int ID)
{
String plainString = InputText;
// create an instance of the library
PGPLib pgp = new PGPLib();
Studnets loginStudent = new Studnets();
DataRow loginS = loginStudent.drSearchStudentEmail(ID);
string password = null;
if (loginS != null)
{
password = loginS["Password"].ToString();
}
String signedString = "";
try
{
signedString = pgp.SignString(plainString,
new FileInfo(path),
password);
}
catch
{
return("false");
}
return(signedString);
}
private void EncryptMessageButton_Click(object sender, RoutedEventArgs e)
{
string publickey = new TextRange(PublicKeyBox.Document.ContentStart, PublicKeyBox.Document.ContentEnd).Text;
string message = new TextRange(MessageToBeEncryptedBox.Document.ContentStart, MessageToBeEncryptedBox.Document.ContentEnd).Text;
PGPLib pgp = new PGPLib();
MemoryStream encryptedmessage = new MemoryStream();
using (MemoryStream messagestream = new MemoryStream(Encoding.UTF8.GetBytes(message)))
{
using (MemoryStream publickeystream = new MemoryStream(Encoding.UTF8.GetBytes(publickey)))
{
bool ascii = true;
pgp.EncryptStream(messagestream, publickeystream, encryptedmessage, ascii);
encryptedmessage = new MemoryStream(encryptedmessage.ToArray());
StreamReader streamReader = new StreamReader(encryptedmessage);
string encryptedtext = streamReader.ReadToEnd();
EncryptedMessageBox.Text = "";
EncryptedMessageBox.Text = encryptedtext;
}
}
}
private void DecryptButton_Click(object sender, RoutedEventArgs e)
{
string encryptedmessage = new TextRange(EncryptedMessageTextbox.Document.ContentStart, EncryptedMessageTextbox.Document.ContentEnd).Text;
string password = PasswordBox.Text;
string privatekey = new TextRange(PrivateKeyTextbox.Document.ContentStart, PrivateKeyTextbox.Document.ContentEnd).Text;
if (encryptedmessage == String.Empty)
{
MessageBox.Show("Keine Nachricht eingegeben");
}
if (privatekey == String.Empty)
{
MessageBox.Show("Keinen Private Key eingegeben");
}
PGPLib pGPLib = new PGPLib();
MemoryStream decrypted = new MemoryStream();
using (MemoryStream encryptedmessagestream = new MemoryStream(Encoding.UTF8.GetBytes(encryptedmessage)))
{
using (MemoryStream privatekeystream = new MemoryStream(Encoding.UTF8.GetBytes(privatekey)))
{
string test = pGPLib.DecryptStream(encryptedmessagestream, privatekeystream, password, decrypted);
decrypted = new MemoryStream(decrypted.ToArray());
StreamReader streamReader = new StreamReader(decrypted);
string decryptedtext = streamReader.ReadToEnd();
DecryptedMessageBox.Text = "";
DecryptedMessageBox.Text = decryptedtext;
}
}
}
public string DecryptFiles(string EncryptedFilePath, string KeyInboundPath, string KeyInboundPassword, string OutputFolder)
{
string result = null;
// initialize the library
PGPLib pgp = new PGPLib();
pgp.Cypher = CypherAlgorithm.TRIPLE_DES;
// decrypts the content of the PGP archive
// and returns array with full file paths of the
// exytracted file(s)
string[] decryptedFileNames = { };
try
{
decryptedFileNames =
pgp.DecryptTo(EncryptedFilePath,
KeyInboundPath,
KeyInboundPassword,
OutputFolder);
}
catch (IOException ex)
{
throw ex;
}
catch (PGPException ex)
{
if (ex is NonPGPDataException)
{
throw new Exception("the passed encrypted input is not a valid OpenPGP archive");
}
else if (ex is IntegrityCheckException)
{
throw new Exception("the passed encrypted input is corrupted");
}
else if (ex is FileIsPBEEncryptedException)
{
throw new Exception("the passed encrypted input is encrypted with a password, but an attempted was made to decrypt it with a private key");
}
else if (ex is WrongPrivateKeyException)
{
throw new Exception("the encrypted input was encrypted with a different private key than the provided one");
}
else if (ex is WrongPasswordException)
{
throw new Exception("the password for the provided private key is wrong");
}
else
{
throw new Exception("general decryption error");
}
}
return(result);
}
public string DecryptFile(string EncryptedFilePath, string KeyInboundPath, string KeyInboundPassword, string SenderKeyPath, string OutputFilePath)
{
string result = null;
// initialize the library
PGPLib pgp = new PGPLib();
pgp.Cypher = CypherAlgorithm.TRIPLE_DES;
try
{
bool verified = pgp.DecryptAndVerifyFile(EncryptedFilePath,
KeyInboundPath,
KeyInboundPassword,
SenderKeyPath,
OutputFilePath);
if (!verified)
{
throw new Exception("Signature is invalid!");
}
}
catch (IOException ex)
{
throw ex;
}
catch (PGPException ex)
{
if (ex is NonPGPDataException)
{
throw new Exception("the passed encrypted input is not a valid OpenPGP archive");
}
else if (ex is IntegrityCheckException)
{
throw new Exception("the passed encrypted input is corrupted");
}
else if (ex is FileIsPBEEncryptedException)
{
throw new Exception("the passed encrypted input is encrypted with a password, but an attempted was made to decrypt it with a private key");
}
else if (ex is WrongPrivateKeyException)
{
throw new Exception("the encrypted input was encrypted with a different private key than the provided one");
}
else if (ex is WrongPasswordException)
{
throw new Exception("the password for the provided private key is wrong");
}
else
{
throw new Exception("general decryption error");
}
}
return(result);
}
static void DownloadandDecrypt()
{
PGPLib pgp = new PGPLib();
bool asciiArmor = false;
bool withIntegrityCheck = false;
string downloadedblobpath = @"C:\DATA FILES\Downloaded Files\";
string decryptedblobpath = @"C:\DATA FILES\Decrypted Files\";
string fileName = "";
string privatekeypassword = "******";
string downloadedfile = System.IO.Path.Combine(downloadedblobpath, fileName);
string decryptedfile = System.IO.Path.Combine(decryptedblobpath, fileName);
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
CloudConfigurationManager.GetSetting("StorageConnectionString"));
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("encryptedtgblfiles");
foreach (IListBlobItem item in container.ListBlobs(null, false))
{
if (item.GetType() == typeof(CloudBlockBlob))
{
CloudBlockBlob blob = (CloudBlockBlob)item;
// Retrieve reference to a blob named "photo1.jpg".
CloudBlockBlob blockBlob = container.GetBlockBlobReference(blob.Name);
// Save blob contents to a file.
using (var fileStream = System.IO.File.OpenWrite(downloadedblobpath + blob.Name))
{
blockBlob.DownloadToStream(fileStream);
}
}
}
if (System.IO.Directory.Exists(downloadedblobpath))
{
string[] files = System.IO.Directory.GetFiles(downloadedblobpath);
// Copy the files and overwrite destination files if they already exist.
foreach (string s in files)
{
// Use static Path methods to extract only the file name from the path.
fileName = System.IO.Path.GetFileName(s);
pgp.DecryptFile(downloadedblobpath + fileName,
@"C:\DATA FILES\privatekey.asc",
privatekeypassword,
decryptedblobpath + fileName);
// destFile = System.IO.Path.Combine(targetPath, fileName);
// System.IO.File.Copy(s, destFile, true);
}
}
}
public Boolean Decreypt(string encrypt, int ID)
{
//Get Public File
GetKey objKey = new GetKey();
DataRow drKey = objKey.drSearchStudentKey(ID);
string PublicKey1 = drKey[0].ToString();
// obtain an OpenPGP signed message
String signedString = encrypt;
// Extract the message and check the validity of the signature
String plainText;
// create an instance of the library
PGPLib pgp = new PGPLib();
SignatureCheckResult signatureCheck;
try
{
signatureCheck = pgp.VerifyString(signedString,
new FileInfo(PublicKey1), out plainText);
}
catch
{
return(false);
}
string strData1 = plainText;
// Print the results
Console.WriteLine("Extracted plain text message is " + plainText);
if (signatureCheck == SignatureCheckResult.SignatureVerified)
{
// Console.WriteLine("Signature OK");
return(true);
}
else if (signatureCheck == SignatureCheckResult.SignatureBroken)
{
//Console.WriteLine("Signature of the message is either broken or forged");
return(false);
}
else if (signatureCheck == SignatureCheckResult.PublicKeyNotMatching)
{
// Console.WriteLine("The provided public key doesn't match the signature");
return(false);
}
else if (signatureCheck == SignatureCheckResult.NoSignatureFound)
{
// Console.WriteLine("This message is not digitally signed");
return(false);
}
return(false);
}
public string EncryptFile(string keyPath, string ediToEnc)
{
try
{
PGPLib pgp = new PGPLib();
return(pgp.EncryptString(ediToEnc, keyPath));
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(string.Empty);
}
}
public void Decreypt(string encrypt)
{
//Get Public File
GetKey objKey = new GetKey();
int ID = Convert.ToInt32(Session["ID"].ToString());
DataRow drKey = objKey.drSearchStudentKey(ID);
string PublicKey1 = drKey[0].ToString();
// obtain an OpenPGP signed message
String signedString = encrypt;
// Extract the message and check the validity of the signature
String plainText;
// create an instance of the library
PGPLib pgp = new PGPLib();
//SignatureCheckResult signatureCheck = pgp.VerifyString(signedString,
// new FileInfo(@"C:\Users\Dua'a-Orcas\Desktop\finalProject\WebApplication1 - Copy (2)\WebApplication1\Sig\public_key_exported.asc"),
// out plainText);
SignatureCheckResult signatureCheck = pgp.VerifyString(signedString,
new FileInfo(PublicKey1), out plainText);
string strData1 = plainText;
// Print the results
Console.WriteLine("Extracted plain text message is " + plainText);
if (signatureCheck == SignatureCheckResult.SignatureVerified)
{
Console.WriteLine("Signature OK");
Result = true;
}
else if (signatureCheck == SignatureCheckResult.SignatureBroken)
{
Console.WriteLine("Signature of the message is either broken or forged");
}
else if (signatureCheck == SignatureCheckResult.PublicKeyNotMatching)
{
Console.WriteLine("The provided public key doesn't match the signature");
}
else if (signatureCheck == SignatureCheckResult.NoSignatureFound)
{
Console.WriteLine("This message is not digitally signed");
}
}
public string EncryptData(string msg, string code = "")
{
if (Init())
{
if (_type == 1)
{
//SHA256 sha256Hash = SHA256.Create();
// byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(msg));
//var key = Encoding.UTF8.GetBytes(code);
//HMACMD5 hmac = new HMACMD5(key);
// Convert the input string to a byte array and compute the hash.
//byte[] bytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(msg));
var rsa = RSA.Create();
rsa.KeySize = _keySize;
rsa.ImportRSAPrivateKey(Convert.FromBase64String(_privateKey), out int byteReads);
var r = rsa.SignData(Encoding.UTF8.GetBytes(msg), HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
//string result = Convert.ToBase64String(r);
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < r.Length; i++)
{
sBuilder.Append(r[i].ToString("x2"));
}
return(sBuilder.ToString());
}
else
{
PGPLib pgp = new PGPLib();
byte[] bytes = Encoding.UTF8.GetBytes(_privateKey);
var stream = new MemoryStream(bytes);
var signed = pgp.SignString(msg, stream, _pgpKeyPassword);
// Xử lý chuỗi lấy ra base64 string
var split = signed.Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries);
string result = string.Join("", split.Skip(2).Take(split.Length - 3));
//
return(result);
}
}
else
{
return(null);
}
}
private string signDataPgp()
{
PGPLib pgp = new PGPLib();
try
{
string privateKeyPem = Directory.GetCurrentDirectory().ToString() + @"\Services\fileKey\privateKeyPGP.asc";
string secretKeyFile = Directory.GetCurrentDirectory().ToString() + @"\Services\fileKey\secretKeyFile.txt";
string signPGPFile = Directory.GetCurrentDirectory().ToString() + @"\Services\fileKey\signPGP.pgp";
pgp.SignFile(secretKeyFile, privateKeyPem, "nhom9", signPGPFile, true);
//var signText = pgp.SignString("nhom9", privateKeyPem, "nhom9");
string signText = System.IO.File.ReadAllText(Directory.GetCurrentDirectory().ToString() + @"\Services\fileKey\signPGP.pgp");
return(signText);
} catch (Exception e)
{
return("");
}
}
public static String MultiRecipientStringEncrypter(string toBeEncryptedData, string secretKeyPath, string[] recipientPublicKeyPaths, bool gui = false, string privatePassWord = "")
{
FileInfo secKeyPathInfo = new FileInfo(secretKeyPath);
FileStream secKeyStream = secKeyPathInfo.OpenRead();
PGPLib pgp = new PGPLib();
MemoryStream streamString = new MemoryStream(Encoding.UTF8.GetBytes(toBeEncryptedData));
FileStream[] recipientPublicKeyPathsStream = new FileStream[recipientPublicKeyPaths.Length];
for (int i = 0; i < recipientPublicKeyPaths.Length; i++)
{
FileInfo publicKeyInfo = new FileInfo(recipientPublicKeyPaths[i]);
recipientPublicKeyPathsStream[i] = publicKeyInfo.OpenRead();
}
if (privatePassWord == "")
{
if (!gui)
{
Console.Write("Please enter the passphrase of the chosen private key: ");
privatePassWord = Console.ReadLine();
}
else
{
privatePassWord = Prompt.ShowDialog("Enter the password of the chosen secret key", "Password entry", false, false, false);
}
}
MemoryStream encryptedOutputStream = new MemoryStream();
Int32 unixTimestamp = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
string filler = unixTimestamp.ToString(); //needed for the encryption, decided that it may as well have a semi-useful value
pgp.SignAndEncryptStream(streamString, filler, secKeyStream, privatePassWord, recipientPublicKeyPathsStream, encryptedOutputStream, true, true);
string encryptedMultiRecipientString = Encoding.ASCII.GetString(encryptedOutputStream.ToArray());
return(encryptedMultiRecipientString);
}
public String encrypet(string InputText, string path)
{
int ID = Convert.ToInt32(Session["ID"].ToString());
String plainString = InputText;
// create an instance of the library
PGPLib pgp = new PGPLib();
Studnets loginStudent = new Studnets();
DataRow loginS = loginStudent.drSearchStudentEmail(ID);
string password = null;
if (loginS != null)
{
password = loginS["Password"].ToString();
}
String signedString = pgp.SignString(plainString,
new FileInfo(path),
password);
return(signedString);
}
public String encrypet(string InputText, string path, string password)
{
String plainString = InputText;
// create an instance of the library
PGPLib pgp = new PGPLib();
String signedString = "";
try
{
signedString = pgp.SignString(plainString,
new FileInfo(path),
password);
}
catch
{
return("false");
}
return(signedString);
}
static void RawFileMovetoEncrypt()
{
PGPLib pgp = new PGPLib();
bool asciiArmor = false;
bool withIntegrityCheck = false;
string sourcePath = @"C:\DATA FILES\Raw Data Files\";
string targetPath = @"C:\DATA FILES\Encrypted Data Files\";
string fileName = "";
int fileSize;
string sourceFile = System.IO.Path.Combine(sourcePath, fileName);
string destFile = System.IO.Path.Combine(targetPath, fileName);
if (System.IO.Directory.Exists(sourcePath))
{
string[] files = System.IO.Directory.GetFiles(sourcePath);
// Copy the files and overwrite destination files if they already exist.
foreach (string s in files)
{
// Use static Path methods to extract only the file name from the path.
fileName = System.IO.Path.GetFileName(s);
pgp.EncryptFile(sourcePath + fileName,
@"C:\DATA FILES\publickey.asc",
targetPath + fileName,
asciiArmor,
withIntegrityCheck);
// destFile = System.IO.Path.Combine(targetPath, fileName);
// System.IO.File.Copy(s, destFile, true);
}
}
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
CloudConfigurationManager.GetSetting("StorageConnectionString"));
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
//encryptedtgblfiles
CloudBlobContainer container = blobClient.GetContainerReference("encryptedtgblfiles");
if (System.IO.Directory.Exists(sourcePath))
{
string[] files = System.IO.Directory.GetFiles(sourcePath);
// Copy the files and overwrite destination files if they already exist.
foreach (string s in files)
{
fileName = System.IO.Path.GetFileName(s);
CloudBlockBlob blockBlob = container.GetBlockBlobReference(fileName);
fileSize = fileName.Length;
// Create or overwrite the "myblob" blob with contents from a local file.
using (var fileStream = System.IO.File.OpenRead(targetPath + fileName))
{
blockBlob.UploadFromStream(fileStream);
}
// To move a file or folder to a new location:
// logger(fileName, "Uploaded",fileSize);
// To move an entire directory. To programmatically modify or combine
// path strings, use the System.IO.Path class.
//System.IO.Directory.Move(@"C:\Users\Public\public\test\", @"C:\Users\Public\private");
}
}
}
public static void Decrypt(string encryptedMessage, string secretKeyPath, string publicKeyPath, bool gui = false, string privatePassWord = "")
{
string plainTextExtracted;
if (privatePassWord == "")
{
if (!gui)
{
Console.Write("Please enter the passphrase of the chosen private key: ");
privatePassWord = Console.ReadLine();
}
else
{
privatePassWord = Prompt.ShowDialog("Enter the password of the chosen secret key", "Password entry", false, false, false);
}
}
// create an instance of the library
PGPLib pgp = new PGPLib();
// decrypt and verify
try
{
SignatureCheckResult signatureCheck =
pgp.DecryptAndVerifyString(encryptedMessage,
new FileInfo(secretKeyPath), //secret key path
privatePassWord, //this is the password of the secret key
new FileInfo(publicKeyPath),
out string plainTextExtract);
plainTextExtracted = plainTextExtract;
// print the results
if (signatureCheck == SignatureCheckResult.SignatureVerified)
{
Console.WriteLine("Signature OK");
if (gui)
{
MessageBox.Show("Signature OK");
}
}
else if (signatureCheck == SignatureCheckResult.SignatureBroken)
{
Console.WriteLine("Signature of the message is either broken or forged");
if (gui)
{
MessageBox.Show("Signature of the message is either broken or forged");
}
}
else if (signatureCheck == SignatureCheckResult.PublicKeyNotMatching)
{
Console.WriteLine("The provided public key doesn't match the signature");
if (gui)
{
MessageBox.Show("The provided public key doesn't match the signature");
}
}
else if (signatureCheck == SignatureCheckResult.NoSignatureFound)
{
Console.WriteLine("This message is not digitally signed");
if (gui)
{
MessageBox.Show("This message is not digitally signed");
}
}
if (!gui)
{
Console.WriteLine("Extracted message: \n" + plainTextExtracted);
}
else
{
SimpleReportViewer.ShowDialog(plainTextExtracted, "Decrypted data", Program.genericGUIForm);
}
}
catch (Exception e)
{
if (e is DidiSoft.Pgp.Exceptions.WrongPrivateKeyException)
{
Console.WriteLine("The chosen private key is either not a private key or not suited to decrypt this message.");
if (gui)
{
MessageBox.Show("The chosen private key is either not a private key or not suited to decrypt this message.");
}
//The supplied private key source is not a private key at all
}
else if (e is DidiSoft.Pgp.Exceptions.WrongPasswordException)
{
Console.WriteLine("The entered passphrase is incorrect, please try again.");
if (!gui)
{
Decrypt(encryptedMessage, secretKeyPath, publicKeyPath);
}
else
{
MessageBox.Show("The entered passphrase is incorrect, please try again.");
}
}
else if (e is DidiSoft.Pgp.Exceptions.WrongPublicKeyException)
{
if (!gui)
{
Console.WriteLine("The chosen public key is either not a public key or not suited to verify this message.");
}
else
{
MessageBox.Show("The chosen public key is either not a public key or not suited to verify this message.");
}
}
else if (e is DidiSoft.Pgp.Exceptions.KeyIsExpiredException)
{
Console.WriteLine("The public key you want to encrypt for is expired and cannot be used.");
if (gui)
{
MessageBox.Show("The public key you want to encrypt for is expired and cannot be used.");
}
//Can be worked around by setting UseExpiredKeys to true
}
else if (e is DidiSoft.Pgp.Exceptions.KeyIsRevokedException)
{
Console.WriteLine("The public key you want to encrypt for appears to be revoked and cannot be used.");
if (gui)
{
MessageBox.Show("The public key you want to encrypt for appears to be revoked and cannot be used.");
}
//Can be worked around by setting UseRevokedKeys to true
}
else if (e is DidiSoft.Pgp.Exceptions.NonPGPDataException)
{
Console.WriteLine("The data you want to decrypt is not encrypted with PGP.");
if (gui)
{
MessageBox.Show("The data you want to decrypt is not encrypted with PGP.");
}
//Can be worked around by setting UseRevokedKeys to true
}
else if (e is IOException)
{
Console.WriteLine("IO Exception has occured, decrypting of unencrypted data is not possible.");
if (gui)
{
MessageBox.Show("IO Exception has occured, decrypting of unencrypted data is not possible.");
}
//Can be worked around by setting UseRevokedKeys to true
}
else
{
throw new ApplicationException("Something unexpected went wrong, contact support and explain your actions in detail and chronological order.");
}
}
}