static Boolean TestKnownEnc(Aes aes, Byte[] Key, Byte[] IV, Byte[] Plain, Byte[] Cipher)
{
Byte[] CipherCalculated;
Console.WriteLine("Encrypting the following bytes:");
PrintByteArray(Plain);
Console.WriteLine("With the following Key:");
PrintByteArray(Key);
Console.WriteLine("and IV:");
PrintByteArray(IV);
Console.WriteLine("Expecting this ciphertext:");
PrintByteArray(Cipher);
ICryptoTransform sse = aes.CreateEncryptor(Key, IV);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, sse, CryptoStreamMode.Write);
cs.Write(Plain,0,Plain.Length);
cs.FlushFinalBlock();
CipherCalculated = ms.ToArray();
cs.Close();
Console.WriteLine("Computed this cyphertext:");
PrintByteArray(CipherCalculated);
if (!Compare(Cipher, CipherCalculated)) {
Console.WriteLine("ERROR: result is different from the expected");
return false;
}
Console.WriteLine("OK");
return true;
}
/// <summary>
/// Encrypt string using AES 128
/// </summary>
/// <param name="plaintext"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string Encrypt(string plaintext, string key)
{
byte[] keybytes = Encoding.UTF8.GetBytes(key);
RijndaelManaged aes = new RijndaelManaged();
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
byte[] IVbytes = Encoding.ASCII.GetBytes("dongbinhuiasxiny");
ICryptoTransform encryptor = aes.CreateEncryptor(keybytes, IVbytes);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write);
byte[] plainBytes = Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes(plaintext)));
cs.Write(plainBytes, 0, plainBytes.Length);
cs.FlushFinalBlock();
byte[] cipherBytes = ms.ToArray();
ms.Close();
cs.Close();
return Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);
}
public static string Encrypt(this string text, string lKey)
{
try
{
using (Aes aes = new AesManaged())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(Encoding.UTF8.GetString(IVa, 0, IVa.Length), Encoding.UTF8.GetBytes(lKey));
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
using (MemoryStream encryptionStream = new MemoryStream())
{
using (CryptoStream encrypt = new CryptoStream(encryptionStream, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] cleanText = Encoding.UTF8.GetBytes(text);
encrypt.Write(cleanText, 0, cleanText.Length);
encrypt.FlushFinalBlock();
}
byte[] encryptedData = encryptionStream.ToArray();
string encryptedText = Convert.ToBase64String(encryptedData);
return encryptedText;
}
}
}
catch
{
return String.Empty;
}
}
public static string Decrypt(this string text, string lKey)
{
try
{
using (Aes aes = new AesManaged())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(Encoding.UTF8.GetString(IVa, 0, IVa.Length), Encoding.UTF8.GetBytes(lKey));
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
using (MemoryStream decryptionStream = new MemoryStream())
{
using (CryptoStream decrypt = new CryptoStream(decryptionStream, aes.CreateDecryptor(), CryptoStreamMode.Write))
{
byte[] encryptedData = Convert.FromBase64String(text);
decrypt.Write(encryptedData, 0, encryptedData.Length);
decrypt.Flush();
}
byte[] decryptedData = decryptionStream.ToArray();
string decryptedText = Encoding.UTF8.GetString(decryptedData, 0, decryptedData.Length);
return decryptedText;
}
}
}
catch
{
return String.Empty;
}
}
/// <summary>
/// Return stream to read encrypted file.
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static CryptoStream Decrypt(string path)
{
FileStream encryptReader = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Delete);
var returnStream = new CryptoStream(encryptReader, RMCrypto.CreateDecryptor(Key, IV), CryptoStreamMode.Read);
Debug.Log("Return encrypt stream");
return returnStream;
}
/// <summary>
/// Return stream to write file in encrypted way.
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static CryptoStream Encrypt(string path)
{
FileStream encryptWriter = new FileStream(path, FileMode.Append,FileAccess.Write,FileShare.Delete);
var returnStream = new CryptoStream(encryptWriter, RMCrypto.CreateEncryptor(Key, IV), CryptoStreamMode.Write);
Debug.Log("Return encrypt stream");
return returnStream;
}
//This method is to encrypt the password given by user.
public static string Encrypt(string data, string password)
{
if (String.IsNullOrEmpty(data))
throw new ArgumentException("No data given");
if (String.IsNullOrEmpty(password))
throw new ArgumentException("No password given");
// setup the encryption algorithm
Rfc2898DeriveBytes keyGenerator = new Rfc2898DeriveBytes(password, 8);
TripleDES tdes = TripleDES.Create();
//Rijndael aes = Rijndael.Create();
tdes.IV = keyGenerator.GetBytes(tdes.BlockSize / 8);
tdes.Key = keyGenerator.GetBytes(tdes.KeySize / 8);
// encrypt the data
byte[] rawData = Encoding.Unicode.GetBytes(data);
using (MemoryStream memoryStream = new MemoryStream())
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, tdes.CreateEncryptor(), CryptoStreamMode.Write))
{
memoryStream.Write(keyGenerator.Salt, 0, keyGenerator.Salt.Length);
cryptoStream.Write(rawData, 0, rawData.Length);
cryptoStream.Close();
byte[] encrypted = memoryStream.ToArray();
return Convert.ToBase64String(encrypted);
}
}
public static Boolean Test() {
String Text = "This is some test text";
Console.WriteLine("Original text : " + Text);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, new ToBase64Transform(), CryptoStreamMode.Write);
cs.Write(Encoding.ASCII.GetBytes(Text), 0, Text.Length);
cs.Close();
Console.WriteLine("Encoded : " + Encoding.ASCII.GetString(ms.ToArray()));
MemoryStream ms1 = new MemoryStream();
CryptoStream cs1 = new CryptoStream(ms1, new FromBase64Transform(), CryptoStreamMode.Write);
cs1.Write(ms.ToArray(), 0, (int)ms.ToArray().Length);
cs1.Close();
Console.WriteLine("Decoded : " + Encoding.ASCII.GetString(ms1.ToArray()));
String mod = Encoding.ASCII.GetString((Byte[])ms.ToArray().Clone());
mod = mod.Insert(17, "\n").Insert(4, " ").Insert(8,"\t");
Byte[] modified = Encoding.ASCII.GetBytes(mod);
MemoryStream ms2 = new MemoryStream();
CryptoStream cs2 = new CryptoStream(ms2, new FromBase64Transform(), CryptoStreamMode.Write);
cs2.Write(modified, 0, (int)modified.Length);
cs2.Close();
Console.WriteLine("Decoded (with whitespaces) : " + Encoding.ASCII.GetString(ms2.ToArray()));
if (!Compare(ms1.ToArray(), ms2.ToArray())) return false;
return true;
}
//cmThe function used to decrypt the text
private static string Decrypt(string strText, string SaltKey)
{
byte[] byKey = { };
byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };
byte[] inputByteArray = new byte[strText.Length + 1];
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(SaltKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(strText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
catch (Exception ex)
{
return ex.Message;
}
}
public static bool ForCodeCoverage()
{
AesManaged aes = new AesManaged();
using (ICryptoTransform cte = aes.CreateEncryptor(), ctd = aes.CreateDecryptor())
{
byte[] plain1 = new byte[64];
for (int i = 0; i < plain1.Length; i++)
plain1[i] = (byte)i;
byte[] encr1 = cte.TransformFinalBlock(plain1, 0, plain1.Length);
using(MemoryStream ms = new MemoryStream())
using(CryptoStream cs = new CryptoStream(ms, ctd, CryptoStreamMode.Write))
{
cs.Write(encr1, 0, 16);
cs.Write(encr1, 16, 16);
cs.Write(encr1, 32, 16);
cs.Write(encr1, 48, encr1.Length-48);
cs.FlushFinalBlock();
byte[] plain2 = ms.ToArray();
if (!Compare(plain1, plain2))
{
Console.WriteLine("CodeCoverage case failed");
return false;
}
return true;
}
}
}
public static byte[] Decrypt(byte[] cipherText, string passPhrase,bool padding)
{
byte[] cipherTextBytes = cipherText;
using (PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (RijndaelManaged symmetricKey = new RijndaelManaged())
{
symmetricKey.Mode = CipherMode.CBC;
if(!padding)
symmetricKey.Padding = PaddingMode.None;
using (ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream(cipherTextBytes))
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
byte[] plainTextBytes = new byte[cipherTextBytes.Length];
cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
return plainTextBytes;
}
}
}
}
}
}
private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)
{
FileStream fs = new FileStream(inName, FileMode.Open, FileAccess.Read);
// Create an instance of the Rijndael cipher
SymmetricAlgorithm aes = Rijndael.Create();
// set the key to be the derivedKey computed above
aes.Key = desKey;
// set the IV to be all zeros
aes.IV = desIV; // arrays are zero-initialized
// now wrap an encryption transform around the filestream
CryptoStream stream1 = new CryptoStream(fs, aes.CreateEncryptor(), CryptoStreamMode.Read);
// The result of reading from stream1 is ciphertext, but we want it
// base64-encoded, so wrap another transform around it
CryptoStream stream2 = new CryptoStream(stream1, new ToBase64Transform(), CryptoStreamMode.Read);
FileStream fsout = new FileStream(outName, FileMode.OpenOrCreate);
byte[] buffer = new byte[1024];
int bytesRead;
do {
bytesRead = stream2.Read(buffer,0,1024);
fsout.Write(buffer,0,bytesRead);
} while (bytesRead > 0);
fsout.Flush();
fsout.Close();
}
// Decrypt a byte array into a byte array using a key and an IV
public static byte[] Decrypt(byte[] cipherData, byte[] Key, byte[] IV)
{
// Create a MemoryStream that is going to accept the decrypted bytes
MemoryStream ms = new MemoryStream();
// Create a symmetric algorithm.
// We are going to use Rijndael because it is strong and available on all platforms.
// You can use other algorithms, to do so substitute the next line with something like
// TripleDES alg = TripleDES.Create();
Rijndael alg = Rijndael.Create();
// Now set the key and the IV.
// We need the IV (Initialization Vector) because the algorithm is operating in its default
// mode called CBC (Cipher Block Chaining). The IV is XORed with the first block (8 byte)
// of the data after it is decrypted, and then each decrypted block is XORed with the previous
// cipher block. This is done to make encryption more secure.
// There is also a mode called ECB which does not need an IV, but it is much less secure.
alg.Key = Key;
alg.IV = IV;
// Create a CryptoStream through which we are going to be pumping our data.
// CryptoStreamMode.Write means that we are going to be writing data to the stream
// and the output will be written in the MemoryStream we have provided.
CryptoStream cs = new CryptoStream(ms, alg.CreateDecryptor(), CryptoStreamMode.Write);
// Write the data and make it do the decryption
cs.Write(cipherData, 0, cipherData.Length);
// Close the crypto stream (or do FlushFinalBlock).
// This will tell it that we have done our decryption and there is no more data coming in,
// and it is now a good time to remove the padding and finalize the decryption process.
cs.Close();
// Now get the decrypted data from the MemoryStream.
// Some people make a mistake of using GetBuffer() here, which is not the right way.
byte[] decryptedData = ms.ToArray();
return decryptedData;
}
public static byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
{
byte[] encryptedBytes = null;
// Set your salt here, change it to meet your flavor:
// The salt bytes must be at least 8 bytes.
byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
using (MemoryStream ms = new MemoryStream())
{
using (RijndaelManaged AES = new RijndaelManaged())
{
AES.KeySize = 256;
AES.BlockSize = 128;
var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
AES.Mode = CipherMode.CBC;
using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
cs.Close();
}
encryptedBytes = ms.ToArray();
}
}
return encryptedBytes;
//end public byte[] AES_Encrypt
}
public static void Main() {
string PlainText = "Titan";
byte[] PlainBytes = new byte[5];
PlainBytes = Encoding.ASCII.GetBytes(PlainText.ToCharArray());
PrintByteArray(PlainBytes);
byte[] CipherBytes = new byte[8];
PasswordDeriveBytes pdb = new PasswordDeriveBytes("Titan", null);
byte[] IV = new byte[8];
byte[] Key = pdb.CryptDeriveKey("RC2", "SHA1", 40, IV);
PrintByteArray(Key);
PrintByteArray(IV);
// Now use the data to encrypt something
RC2CryptoServiceProvider rc2 = new RC2CryptoServiceProvider();
Console.WriteLine(rc2.Padding);
Console.WriteLine(rc2.Mode);
ICryptoTransform sse = rc2.CreateEncryptor(Key, IV);
MemoryStream ms = new MemoryStream();
CryptoStream cs1 = new CryptoStream(ms, sse, CryptoStreamMode.Write);
cs1.Write(PlainBytes, 0, PlainBytes.Length);
cs1.FlushFinalBlock();
CipherBytes = ms.ToArray();
cs1.Close();
Console.WriteLine(Encoding.ASCII.GetString(CipherBytes));
PrintByteArray(CipherBytes);
ICryptoTransform ssd = rc2.CreateDecryptor(Key, IV);
CryptoStream cs2 = new CryptoStream(new MemoryStream(CipherBytes), ssd, CryptoStreamMode.Read);
byte[] InitialText = new byte[5];
cs2.Read(InitialText, 0, 5);
Console.WriteLine(Encoding.ASCII.GetString(InitialText));
PrintByteArray(InitialText);
}
public static string DecryptString(string input, string cryptographicProvider_PublicKey, string cryptographicProvider_IV)
{
try
{
input = input.Replace(CryptographicProviderKey, String.Empty);
using (var dataString = new MemoryStream())
{
var service = new TripleDESCryptoServiceProvider().CreateDecryptor(Encoding.UTF8.GetBytes(cryptographicProvider_PublicKey),
Encoding.UTF8.GetBytes(cryptographicProvider_IV));
using (var cryptoStream = new CryptoStream(dataString, service, CryptoStreamMode.Write))
{
var inputData = Convert.FromBase64String(input);
cryptoStream.Write(inputData, 0, inputData.Length);
cryptoStream.FlushFinalBlock();
var dataResult = dataString.ToArray();
var resultString = Encoding.UTF8.GetString(Convert.FromBase64String(Convert.ToBase64String(dataResult)));
cryptoStream.Close();
return resultString;
}
}
}
catch (Exception e)
{
return e.ToString();
}
}
//This method is to decrypt the password given by user.
public static string Decrypt(string data, string password)
{
if (String.IsNullOrEmpty(data))
throw new ArgumentException("No data given");
if (String.IsNullOrEmpty(password))
throw new ArgumentException("No password given");
byte[] rawData = Convert.FromBase64String(data.Replace(" ", "+"));
if (rawData.Length < 8)
throw new ArgumentException("Invalid input data");
// setup the decryption algorithm
byte[] salt = new byte[8];
for (int i = 0; i < salt.Length; i++)
salt[i] = rawData[i];
Rfc2898DeriveBytes keyGenerator = new Rfc2898DeriveBytes(password, salt);
TripleDES tdes = TripleDES.Create();
//Rijndael aes = Rijndael.Create();
tdes.IV = keyGenerator.GetBytes(tdes.BlockSize / 8);
tdes.Key = keyGenerator.GetBytes(tdes.KeySize / 8);
// decrypt the data
using (MemoryStream memoryStream = new MemoryStream())
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, tdes.CreateDecryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(rawData, 8, rawData.Length - 8);
cryptoStream.Close();
byte[] decrypted = memoryStream.ToArray();
return Encoding.Unicode.GetString(decrypted);
}
}
public static string Decrypt(byte[] key, byte[] iv, byte[] input)
{
if (key == null || iv == null || input == null)
{
return null;
}
// Create a memory stream to the passed buffer.
MemoryStream ms = new MemoryStream(input);
// Create a CryptoStream using the memory stream and the
// CSP DES key.
CryptoStream encStream = new CryptoStream(ms, m_desKey.CreateDecryptor(key, iv), CryptoStreamMode.Read);
// Create a StreamReader for reading the stream.
StreamReader sr = new StreamReader(encStream);
// Read the stream as a string.
string val = sr.ReadToEnd();
// Close the streams.
sr.Close();
encStream.Close();
ms.Close();
return val;
}
/// <summary>
/// 对文件内容进行DES解密
/// </summary>
/// <param name="sourceFile">待解密的文件绝对路径</param>
/// <param name="destFile">解密后的文件保存的绝对路径</param>
public static void DecryptFile(string sourceFile, string destFile)
{
if (!File.Exists(sourceFile)) throw new FileNotFoundException("指定的文件路径不存在！", sourceFile);
byte[] btKey = Encoding.Default.GetBytes(key);
byte[] btIV = Encoding.Default.GetBytes(iv);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] btFile = File.ReadAllBytes(sourceFile);
using (FileStream fs = new FileStream(destFile, FileMode.Create, FileAccess.Write))
{
try
{
using (CryptoStream cs = new CryptoStream(fs, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
{
cs.Write(btFile, 0, btFile.Length);
cs.FlushFinalBlock();
}
}
catch
{
throw;
}
finally
{
fs.Close();
}
}
}
protected string DecryptString(string InputText, string Password)
{
try
{
RijndaelManaged RijndaelCipher = new RijndaelManaged();
byte[] EncryptedData = Convert.FromBase64String(InputText);
byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
// Create a decryptor from the existing SecretKey bytes.
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(16), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream(EncryptedData);
// Create a CryptoStream. (always use Read mode for decryption).
CryptoStream cryptoStream = new CryptoStream(memoryStream, Decryptor, CryptoStreamMode.Read);
// Since at this point we don't know what the size of decrypted data
// will be, allocate the buffer long enough to hold EncryptedData;
// DecryptedData is never longer than EncryptedData.
byte[] PlainText = new byte[EncryptedData.Length];
// Start decrypting.
int DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length);
memoryStream.Close();
cryptoStream.Close();
// Convert decrypted data into a string.
string DecryptedData = Encoding.Unicode.GetString(PlainText, 0, DecryptedCount);
// Return decrypted string.
return DecryptedData;
}
catch (Exception exception)
{
return (exception.Message);
}
}
/// <summary>
/// Decrypt byte array
/// </summary>
/// <param name="dataStream">encrypted data array</param>
/// <param name="password">password</param>
/// <returns>unencrypted data array</returns>
private static byte[] DecryptStream(byte[] dataStream, string password)
{
SqlPipe pipe = SqlContext.Pipe;
//the decrypter
RijndaelManaged cryptic = new RijndaelManaged
{
Key = Encoding.ASCII.GetBytes(password),
IV = Encoding.ASCII.GetBytes("1qazxsw23edcvfr4"),
Padding = PaddingMode.ISO10126,
};
//Get a decryptor that uses the same key and IV as the encryptor used.
ICryptoTransform decryptor = cryptic.CreateDecryptor();
//Now decrypt encrypted data stream
MemoryStream msDecrypt = new MemoryStream(dataStream);
CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
byte[] fromEncrypt = new byte[dataStream.Length];
//Read the data out of the crypto stream.
try
{
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
}
catch (Exception e)
{
pipe.Send("Failed to decrypt data");
pipe.Send(e.Message);
throw;
}
return fromEncrypt;
}
public static string DecryptRijndael(string encryptedString)
{
byte[] encrypted;
byte[] fromEncrypted;
UTF8Encoding utf8Converter = new UTF8Encoding();
encrypted = Convert.FromBase64String(encryptedString);
RijndaelManaged myRijndael = new RijndaelManaged();
ICryptoTransform decryptor = myRijndael.CreateDecryptor(Key, IV);
MemoryStream ms = new MemoryStream(encrypted);
CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read);
fromEncrypted = new byte[encrypted.Length];
cs.Read(fromEncrypted, 0, fromEncrypted.Length);
string decryptedString = utf8Converter.GetString(fromEncrypted);
int indexNull = decryptedString.IndexOf("\0");
if (indexNull > 0)
{
decryptedString = decryptedString.Substring(0, indexNull);
}
return decryptedString;
}
internal static bool DecryptFile(string inputPath, string outputPath, string password)
{
var input = new FileStream(inputPath, FileMode.Open, FileAccess.Read);
var output = new FileStream(outputPath, FileMode.OpenOrCreate, FileAccess.Write);
// Essentially, if you want to use RijndaelManaged as AES you need to make sure that:
// 1.The block size is set to 128 bits
// 2.You are not using CFB mode, or if you are the feedback size is also 128 bits
RijndaelManaged algorithm = new RijndaelManaged {KeySize = 256, BlockSize = 128};
algorithm.Mode = CipherMode.CBC;
var key = new Rfc2898DeriveBytes(password, Encoding.ASCII.GetBytes(Salt));
algorithm.Key = key.GetBytes(algorithm.KeySize/8);
algorithm.IV = key.GetBytes(algorithm.BlockSize/8);
try
{
using (var decryptedStream = new CryptoStream(output, algorithm.CreateDecryptor(), CryptoStreamMode.Write))
{
CopyStream(input, decryptedStream);
return true;
}
}
catch (CryptographicException)
{
throw new InvalidDataException("Please supply a correct password");
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 对数据进行解密
/// </summary>
/// <param name="decryptstring">需要解密的数据</param>
/// <returns></returns>
public static string Decode(string data)
{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
byte[] byEnc;
try
{
byEnc = Convert.FromBase64String(data);
}
catch
{
return null;
}
try
{
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream ms = new MemoryStream(byEnc);
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cst);
return sr.ReadToEnd();
}
catch
{
return null;
}
}
/// <summary>
/// Decrypts a previously encrypted string.
/// </summary>
/// <param name="inputText">The encrypted string to decrypt.</param>
/// <returns>A decrypted string.</returns>
public static string Decrypt(string inputText)
{
string decrypted = null;
try
{
RijndaelManaged rijndaelCipher = new RijndaelManaged();
byte[] encryptedData = Convert.FromBase64String(inputText);
PasswordDeriveBytes secretKey = new PasswordDeriveBytes(ENCRYPTION_KEY, SALT);
using (ICryptoTransform decryptor = rijndaelCipher.CreateDecryptor(secretKey.GetBytes(32), secretKey.GetBytes(16)))
{
using (MemoryStream memoryStream = new MemoryStream(encryptedData))
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
byte[] plainText = new byte[encryptedData.Length];
int decryptedCount = cryptoStream.Read(plainText, 0, plainText.Length);
decrypted = Encoding.Unicode.GetString(plainText, 0, decryptedCount);
}
}
}
}
catch (Exception)
{
}
return decrypted;
}
private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)
{
//Create the file streams to handle the input and output files.
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
//Create variables to help with read and write.
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
long rdlen = 0; //This is the total number of bytes written.
long totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be written at a time.
SymmetricAlgorithm des = new DESCryptoServiceProvider();
des.Padding = PaddingMode.PKCS7;
CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);
Console.WriteLine("Encrypting...");
//Read from the input file, then encrypt and write to the output file.
while(rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
Console.WriteLine("{0} bytes processed", rdlen);
}
encStream.Close();
}
private string DeCryption(string content, string sKey, string sIV)
{
try
{
byte[] inputByteArray = Convert.FromBase64String(content);
using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider())
{
//byte[] inputByteArray = Convert.FromBase64String(content);
desProvider.Key = System.Text.Encoding.ASCII.GetBytes(sKey);
desProvider.IV = System.Text.Encoding.ASCII.GetBytes(sIV);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
using (CryptoStream cs = new CryptoStream(ms,desProvider.CreateDecryptor(), CryptoStreamMode.Write))
{
//cs.Clear();
cs.Write(inputByteArray,0,inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
string str = System.Text.Encoding.UTF8.GetString(ms.ToArray());
ms.Close();
return str;
}
}
catch
{
return "String Not Base64 Encode!!!";
}
}
static int Main ()
{
string filename = Path.Combine (AppDomain.CurrentDomain.BaseDirectory,
"encrypt.tmp");
string data = "this is sensitive data";
DESCryptoServiceProvider des = new DESCryptoServiceProvider ();
des.GenerateIV ();
des.GenerateKey ();
// ----------- WRITING ENCRYPTED SERIALIZED DATA ------------------
Stream stream = new FileStream (filename, FileMode.Create, FileAccess.Write);
stream = new CryptoStream (stream, des.CreateEncryptor (), CryptoStreamMode.Write);
BinaryFormatter bformatter = new BinaryFormatter ();
bformatter.Serialize (stream, data);
stream.Close ();
stream = null;
bformatter = null;
data = string.Empty;
// ----------- READING ENCRYPTED SERIALIZED DATA ------------------
stream = new FileStream (filename, FileMode.Open, FileAccess.Read);
stream = new CryptoStream (stream, des.CreateDecryptor (), CryptoStreamMode.Read);
bformatter = new BinaryFormatter ();
data = (string) bformatter.Deserialize (stream);
stream.Close ();
//----------- CHECK RESULTS ----------------
if (data != "this is sensitive data")
return 1;
return 0;
}
private static byte[] encryptStringToBytes_AES(String plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
{
throw new ArgumentNullException("plainText");
}
if (Key == null || Key.Length <= 0)
{
throw new ArgumentNullException("Name");
}
if (IV == null || IV.Length <= 0)
{
throw new ArgumentNullException("Name");
}
// Declare the streams used
// to encrypt to an in memory
// array of bytes.
MemoryStream msEncrypt = null;
CryptoStream csEncrypt = null;
StreamWriter swEncrypt = null;
// Declare the RijndaelManaged object
// used to encrypt the data.
RijndaelManaged aesAlg = null;
// Declare the bytes used to hold the
// encrypted data.
//byte[] encrypted = null;
try
{
// Create a RijndaelManaged object
// with the specified SessionID and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
msEncrypt = new MemoryStream();
csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
swEncrypt = new StreamWriter(csEncrypt);
//Write all data to the stream.
swEncrypt.Write(plainText);
}
finally
{
// Clean things up.
// Close the streams.
if (swEncrypt != null)
{
swEncrypt.Close();
}
if (csEncrypt != null)
{
csEncrypt.Close();
}
if (msEncrypt != null)
{
msEncrypt.Close();
}
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
// Return the encrypted bytes from the memory stream.
return(msEncrypt.ToArray());
}
private static String decryptStringFromBytes_AES_tostring(byte[] cipherText, byte[] Key, byte[] IV)
{
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
{
throw new ArgumentNullException("cipherText");
}
if (Key == null || Key.Length <= 0)
{
throw new ArgumentNullException("Name");
}
if (IV == null || IV.Length <= 0)
{
throw new ArgumentNullException("Name");
}
// TDeclare the streams used
// to decrypt to an in memory
// array of bytes.
MemoryStream msDecrypt = null;
CryptoStream csDecrypt = null;
StreamReader srDecrypt = null;
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged aesAlg = null;
// Declare the String used to hold
// the decrypted text.
String plaintext = null;
try
{
// Create a RijndaelManaged object
// with the specified SessionID and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
msDecrypt = new MemoryStream(cipherText);
csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
srDecrypt = new StreamReader(csDecrypt);
// Read the decrypted bytes from the decrypting stream
// and place them in a String.
plaintext = srDecrypt.ReadToEnd();
}
finally
{
// Clean things up.
// Close the streams.
if (srDecrypt != null)
{
srDecrypt.Close();
}
if (csDecrypt != null)
{
csDecrypt.Close();
}
if (msDecrypt != null)
{
msDecrypt.Close();
}
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
return(plaintext);
}
private static byte[] decrypt_AES(byte[] data, byte[] Key, byte[] IV)
{
// Check arguments.
if (Key.Length != 32)
{
throw new ArgumentNullException("Key");
}
if (data.Length < 1)
{
throw new ArgumentNullException("cipherText");
}
if (IV.Length != 16)
{
throw new ArgumentNullException("IV");
}
// TDeclare the streams used
// to decrypt to an in memory
// array of bytes.
MemoryStream msDecrypt = null;
CryptoStream csDecrypt = null;
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged aesAlg = null;
// the decrypted data.
byte[] clear = null;
try
{
// Create a RijndaelManaged object
// with the specified SessionID and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
msDecrypt = new MemoryStream(data);
csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
// Read the decrypted bytes from the decrypting stream
clear = new byte[data.Length];
csDecrypt.Read(clear, 0, data.Length);
}
finally
{
// Clean things up.
// Close the streams.
if (csDecrypt != null)
{
csDecrypt.Close();
}
if (msDecrypt != null)
{
msDecrypt.Close();
}
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
return(clear);
}
private static byte[] encrypt_AES(byte[] data, byte[] Key, byte[] IV)
{
// Check arguments.
if (Key.Length != 32)
{
throw new ArgumentNullException("Key");
}
if (data.Length < 1)
{
throw new ArgumentNullException("data");
}
if (IV.Length != 16)
{
throw new ArgumentNullException("IV");
}
// Declare the streams used
// to encrypt to an in memory
// array of bytes.
MemoryStream msEncrypt = null;
CryptoStream csEncrypt = null;
// Declare the RijndaelManaged object
// used to encrypt the data.
RijndaelManaged aesAlg = null;
// Declare the bytes used to hold the
// encrypted data.
//byte[] encrypted = null;
try
{
// Create a RijndaelManaged object
// with the specified SessionID and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
msEncrypt = new MemoryStream();
csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
//Write all data to the stream.
csEncrypt.Write(data, 0, data.Length);
csEncrypt.FlushFinalBlock();
}
finally
{
// Clean things up.
// Close the streams.
if (csEncrypt != null)
{
csEncrypt.Close();
}
if (msEncrypt != null)
{
msEncrypt.Close();
}
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
// Return the encrypted bytes from the memory stream.
return(msEncrypt.ToArray());
}
/// <summary>
/// DES 加密
/// </summary>
/// <param name="Values">要加密的字符串</param>
/// <returns>加密后的字符串</returns>
public string DESEncrypt(string Values)
{
try
{
DESCryptoServiceProvider DesHash = new DESCryptoServiceProvider();
DesHash.Mode = CipherMode.CBC;
byte[] byt;
if (null == this._Key)
{
DesHash.GenerateKey();
_Key = Encoding.ASCII.GetString(DesHash.Key);
}
else
{
if (_Key.Length > 8)
{
_Key = _Key.Substring(0, 8);
}
else
{
for (int i = 8; i < _Key.Length; i--)
{
_Key += "0";
}
}
}
if (null == this._IV)
{
DesHash.GenerateIV();
_IV = Encoding.ASCII.GetString(DesHash.IV);
}
else
{
if (_IV.Length > 8)
{
_IV = _IV.Substring(0, 8);
}
else
{
for (int i = 8; i < _IV.Length; i--)
{
_IV += "0";
}
}
}
//return _Key + "：" + Encoding.ASCII.GetBytes(_Key).Length.ToString() + "<br>"+ _IV + "：" + Encoding.ASCII.GetBytes(this._IV).Length.ToString();
byt = Encoding.UTF8.GetBytes(Values);
ICryptoTransform ct = DesHash.CreateEncryptor(Encoding.ASCII.GetBytes(this._Key), Encoding.ASCII.GetBytes(this._IV));
DesHash.Clear();
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
cs.Write(byt, 0, byt.Length);
cs.FlushFinalBlock();
cs.Close();
return(Convert.ToBase64String(ms.ToArray()));
}
catch (System.Exception e)
{
throw new System.Exception("加密数据出错,详细原因：" + e.Message);
}
}
private static Stream Decrypt(Stream stream, ExchangePrivateKey privateKey)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (privateKey == null)
{
throw new ArgumentNullException(nameof(privateKey));
}
try
{
int type = (int)Varint.GetUInt64(stream);
if (type == (int)ConvertCryptoAlgorithm.Aes256)
{
byte[] cryptoKey;
{
int length = (int)Varint.GetUInt64(stream);
var encryptedBuffer = new byte[length];
if (stream.Read(encryptedBuffer, 0, encryptedBuffer.Length) != encryptedBuffer.Length)
{
throw new ArgumentException();
}
cryptoKey = Exchange.Decrypt(privateKey, encryptedBuffer);
}
var iv = new byte[32];
stream.Read(iv, 0, iv.Length);
RecyclableMemoryStream outStream = null;
try
{
outStream = new RecyclableMemoryStream(_bufferManager);
using (var aes = Aes.Create())
{
aes.KeySize = 256;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
using (var inStream = new RangeStream(stream, stream.Position, stream.Length - stream.Position, true))
using (var cs = new CryptoStream(inStream, aes.CreateDecryptor(cryptoKey, iv), CryptoStreamMode.Read))
using (var safeBuffer = _bufferManager.CreateSafeBuffer(1024 * 4))
{
int length;
while ((length = cs.Read(safeBuffer.Value, 0, safeBuffer.Value.Length)) > 0)
{
outStream.Write(safeBuffer.Value, 0, length);
}
}
}
outStream.Seek(0, SeekOrigin.Begin);
}
catch (Exception)
{
if (outStream != null)
{
outStream.Dispose();
}
throw;
}
return(outStream);
}
else
{
throw new NotSupportedException();
}
}
catch (Exception e)
{
throw new ArgumentException(e.Message, e);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
}
public ActionResult Edit(Password password)
{
if (password.PasswordId == -1)
{
password.CreatedByUserId = User.UserID;
password.CreatedOnDate = DateTime.UtcNow;
password.LastModifiedByUserId = User.UserID;
password.LastModifiedOnDate = DateTime.UtcNow;
string pwd1 = ModuleContext.Configuration.ModuleSettings["JTM2_PasswordManager_MasterPassword"].ToString();
// Create a byte array to hold the random value.
byte[] salt1 = new byte[SALT_LEN];
using (RNGCryptoServiceProvider rngCsp = new
RNGCryptoServiceProvider())
{
// Fill the array with a random value.
rngCsp.GetBytes(salt1);
}
//data1 can be a string or contents of a file.
string data1 = password.PasswordPlainText;
//The default iteration count is 1000 so the two methods use the same iteration count.
try
{
Rfc2898DeriveBytes k1 = new Rfc2898DeriveBytes(pwd1, salt1,
NUM_PBKDF2_ITERS);
// Encrypt the data.
Aes encAlg = Aes.Create();
password.PasswordIV = encAlg.IV;
encAlg.Key = k1.GetBytes(KEY_LEN);
MemoryStream encryptionStream = new MemoryStream();
CryptoStream encrypt = new CryptoStream(encryptionStream,
encAlg.CreateEncryptor(), CryptoStreamMode.Write);
byte[] utfD1 = new System.Text.UTF8Encoding(false).GetBytes(
data1);
encrypt.Write(utfD1, 0, utfD1.Length);
encrypt.FlushFinalBlock();
encrypt.Close();
byte[] edata1 = encryptionStream.ToArray();
password.PasswordText = edata1;
k1.Reset();
}
catch (Exception e)
{
Console.WriteLine("Error: ", e);
}
password.PasswordSalt = salt1;
password.PasswordPlainText = "";
PasswordManager.Instance.CreatePassword(password);
}
else
{
var existingPassword = PasswordManager.Instance.GetPassword(password.PasswordId, password.ModuleId);
existingPassword.LastModifiedByUserId = User.UserID;
existingPassword.LastModifiedOnDate = DateTime.UtcNow;
existingPassword.PasswordSite = password.PasswordSite;
existingPassword.PasswordText = password.PasswordText;
existingPassword.PasswordUrl = password.PasswordUrl;
existingPassword.PasswordNotes = password.PasswordNotes;
existingPassword.PasswordPlainText = "";
existingPassword.PasswordIV = password.PasswordIV;
existingPassword.PasswordSalt = password.PasswordSalt;
existingPassword.AssignedUserId = password.AssignedUserId;
PasswordManager.Instance.UpdatePassword(existingPassword);
}
return(RedirectToDefaultRoute());
}
public byte[] PublicFinalizeHashing(
CryptoStream hashStream,
byte[] salt) => base.FinalizeHashing(hashStream, salt);
public byte[] PublicWriteSalt(
CryptoStream hashStream,
byte[] salt) => base.WriteSalt(hashStream, salt);
public static String encryption(string plainText)
{
//Initial Setup:
//------------------------------------------------------------------------------------------------------------------
String ciphertext = "";
//------------------------------------------------------------------------------------------------------------------
//Do Initial Error Checking before encryption:
//------------------------------------------------------------------------------------------------------------------
if (plainText == null || plainText.Length <= 0)
{
throw new ArgumentException("plaintext");
}
if (key == null || key.Length <= 0)
{
throw new ArgumentException("key");
}
if (iv == null || iv.Length <= 0)
{
throw new ArgumentException("iv");
}
//------------------------------------------------------------------------------------------------------------------
//Declare encrypted Byte Array:
//------------------------------------------------------------------------------------------------------------------
byte[] encrypted;
//------------------------------------------------------------------------------------------------------------------
//Encrypt plaintext:
//------------------------------------------------------------------------------------------------------------------
using (Rijndael rij = Rijndael.Create())
{
rij.Key = key;
rij.IV = iv;
ICryptoTransform encryptor = rij.CreateEncryptor(rij.Key, rij.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter westream = new StreamWriter(csEncrypt))
{
westream.Write(plainText);
} //END OF STREAM-WRITER.
encrypted = msEncrypt.ToArray();
} //END OF CRYPTO_STREAM.
} //END OF MEMORY-STREAM.
} //END OF RIJNDAEL.
//------------------------------------------------------------------------------------------------------------------
//Convert Byte array to string:
//------------------------------------------------------------------------------------------------------------------
ciphertext = System.Text.Encoding.Default.GetString(encrypted);
//------------------------------------------------------------------------------------------------------------------
//Return Encrypted String:
//------------------------------------------------------------------------------------------------------------------
return(ciphertext);
//------------------------------------------------------------------------------------------------------------------
}//END OF ENCRYPTION FUNCTION.
public async Task LocalOrchestrator_Interceptor_ShouldSerialize()
{
var dbNameSrv = HelperDatabase.GetRandomName("tcp_lo_srv");
await HelperDatabase.CreateDatabaseAsync(ProviderType.Sql, dbNameSrv, true);
var dbNameCli = HelperDatabase.GetRandomName("tcp_lo_cli");
await HelperDatabase.CreateDatabaseAsync(ProviderType.Sql, dbNameCli, true);
var csServer = HelperDatabase.GetConnectionString(ProviderType.Sql, dbNameSrv);
var serverProvider = new SqlSyncProvider(csServer);
var csClient = HelperDatabase.GetConnectionString(ProviderType.Sql, dbNameCli);
var clientProvider = new SqlSyncProvider(csClient);
await new AdventureWorksContext((dbNameSrv, ProviderType.Sql, serverProvider), true, false).Database.EnsureCreatedAsync();
await new AdventureWorksContext((dbNameCli, ProviderType.Sql, clientProvider), true, false).Database.EnsureCreatedAsync();
var scopeName = "scopesnap1";
// Make a first sync to be sure everything is in place
var agent = new SyncAgent(clientProvider, serverProvider, this.Tables, scopeName);
// Making a first sync, will initialize everything we need
var r = await agent.SynchronizeAsync();
// Get the orchestrators
var localOrchestrator = agent.LocalOrchestrator;
var remoteOrchestrator = agent.RemoteOrchestrator;
// Server side : Create a product category and a product
// Create a productcategory item
// Create a new product on server
var productId = Guid.NewGuid();
var productName = HelperDatabase.GetRandomName();
var productNumber = productName.ToUpperInvariant().Substring(0, 10);
var productCategoryName = HelperDatabase.GetRandomName();
var productCategoryId = productCategoryName.ToUpperInvariant().Substring(0, 6);
using (var ctx = new AdventureWorksContext((dbNameCli, ProviderType.Sql, clientProvider)))
{
var pc = new ProductCategory {
ProductCategoryId = productCategoryId, Name = productCategoryName
};
ctx.Add(pc);
var product = new Product {
ProductId = productId, Name = productName, ProductNumber = productNumber
};
ctx.Add(product);
await ctx.SaveChangesAsync();
}
// Defining options with Batchsize to enable serialization on disk
agent.Options.BatchSize = 2000;
var myRijndael = new RijndaelManaged();
myRijndael.GenerateKey();
myRijndael.GenerateIV();
// Encrypting data on disk
localOrchestrator.OnSerializingSet(ssa =>
{
// Create an encryptor to perform the stream transform.
var encryptor = myRijndael.CreateEncryptor(myRijndael.Key, myRijndael.IV);
using (var msEncrypt = new MemoryStream())
{
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
var strSet = JsonConvert.SerializeObject(ssa.Set);
swEncrypt.Write(strSet);
}
ssa.Result = msEncrypt.ToArray();
}
}
});
// Get changes to be populated to the server.
// Should intercept the OnSerializing interceptor
var changes = await localOrchestrator.GetChangesAsync();
}
public string Decrypt(string EncryptedValue)
{
Byte[] encryptedPasswordBytes = Convert.FromBase64String(EncryptedValue);
Byte[] textBytes;
String plainTextValue;
UTF8Encoding encoder = new UTF8Encoding();
// Perform Decryption
//-------------------
// Create an instances of the decryption algorithm (Rinjdael AES) for the encryption to perform,
// a memory stream used to store the decrypted data temporarily, and
// a crypto stream that performs the decryption algorithm.
RijndaelManaged rmEncryption = new RijndaelManaged();
MemoryStream myMemoryStream = new MemoryStream();
CryptoStream myDecryptionStream = new CryptoStream(myMemoryStream, rmEncryption.CreateDecryptor(key, vector), CryptoStreamMode.Write);
// Use the crypto stream to perform the decryption on the encrypted data in the byte array.
myDecryptionStream.Write(encryptedPasswordBytes, 0, encryptedPasswordBytes.Length);
myDecryptionStream.FlushFinalBlock();
// Retrieve the decrypted data from the memory stream, and write it to a separate byte array.
myMemoryStream.Position = 0;
textBytes = new Byte[myMemoryStream.Length];
myMemoryStream.Read(textBytes, 0, textBytes.Length);
// Close all the streams.
myDecryptionStream.Close();
myMemoryStream.Close();
// Convert the bytes to a string and display it.
plainTextValue = encoder.GetString(textBytes);
return(plainTextValue);
}
public async Task <byte[]> PublicWriteSaltAsync(
CryptoStream hashStream,
byte[] salt) => await base.WriteSaltAsync(hashStream, salt);
/// <summary>
/// Decrypt the given string. Assumes the string was encrypted using
/// EncryptStringAES(), using an identical sharedSecret.
/// </summary>
/// <param name="cipherText">The text to decrypt.</param>
/// <param name="sharedSecret">A password used to generate a key for decryption.</param>
public string DecryptStringAES(string cipherText, string sharedSecret, string inpSalt = null, int FromFETPIP = 0)
{
if (string.IsNullOrEmpty(cipherText))
{
throw new ArgumentNullException("cipherText");
}
if (string.IsNullOrEmpty(sharedSecret))
{
throw new ArgumentNullException("sharedSecret");
}
if (!string.IsNullOrEmpty(inpSalt))
{
//System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
//salt = encoding.GetBytes(inpSalt);
// UNCOMMENT ME (below)
salt = Encoding.ASCII.GetBytes(inpSalt + pepperEnc);
//salt = Encoding.ASCII.GetBytes(inpSalt);
}
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged aesAlg = null;
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
try
{
// generate the key from the shared secret and the salt
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, salt);
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Padding = PaddingMode.Zeros;
aesAlg.BlockSize = 256;
aesAlg.KeySize = 256;
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
aesAlg.IV = key.GetBytes(aesAlg.BlockSize / 8);
// Create a decryptor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
if (FromFETPIP == 1)
{
byte[] bytes = Convert.FromBase64String(cipherText);
using (MemoryStream msDecrypt = new MemoryStream(bytes))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
else
{
SoapHexBinary shb = SoapHexBinary.Parse(cipherText);
byte[] bytes = shb.Value;
using (MemoryStream msDecrypt = new MemoryStream(bytes))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
return(plaintext.TrimEnd('\0')); // TrimEnd shouldn't be necessary but sometimes they're still there (it also gets stripped when inserted into dictionary in LogggedInMaster)
}
public static void DecryptFile(string inFile, string destinationFile)
{
Aes aes = Aes.Create();
byte[] LenK = new byte[4];
byte[] LenIV = new byte[4];
inFile = Path.ChangeExtension(inFile, extension);
using (FileStream inFs = new FileStream(inFile, FileMode.Open))
{
inFs.Seek(0, SeekOrigin.Begin);
inFs.Seek(0, SeekOrigin.Begin);
inFs.Read(LenK, 0, 3);
inFs.Seek(4, SeekOrigin.Begin);
inFs.Read(LenIV, 0, 3);
int lenK = BitConverter.ToInt32(LenK, 0);
int lenIV = BitConverter.ToInt32(LenIV, 0);
int startC = lenK + lenIV + 8;
int lenC = (int)inFs.Length - startC;
byte[] KeyEncrypted = new byte[lenK];
byte[] IV = new byte[lenIV];
inFs.Seek(8, SeekOrigin.Begin);
inFs.Read(KeyEncrypted, 0, lenK);
inFs.Seek(8 + lenK, SeekOrigin.Begin);
inFs.Read(IV, 0, lenIV);
byte[] KeyDecrypted = rsa.Decrypt(KeyEncrypted, false);
ICryptoTransform transform = aes.CreateDecryptor(KeyDecrypted, IV);
using (FileStream outFs = new FileStream(destinationFile, FileMode.Create))
{
int count = 0;
int offset = 0;
int blockSizeBytes = aes.BlockSize / 8;
byte[] data = new byte[blockSizeBytes];
inFs.Seek(startC, SeekOrigin.Begin);
using (CryptoStream outStreamDecrypted = new CryptoStream(outFs, transform, CryptoStreamMode.Write))
{
do
{
count = inFs.Read(data, 0, blockSizeBytes);
offset += count;
outStreamDecrypted.Write(data, 0, count);
}while (count > 0);
outStreamDecrypted.FlushFinalBlock();
outStreamDecrypted.Close();
}
outFs.Close();
}
inFs.Close();
}
}
/// <summary>
/// DES 解密
/// </summary>
/// <param name="Values">加密后的字符串</param>
/// <returns>解密后的字符串</returns>
public string DeDESEncrypt(string Values)
{
try
{
byte[] buffer = Convert.FromBase64String(Values);
DESCryptoServiceProvider DesHash = new DESCryptoServiceProvider();
DesHash.Mode = CipherMode.CBC;
#region 处理key ,iv
if (null == this._Key)
{
DesHash.GenerateKey();
_Key = Encoding.ASCII.GetString(DesHash.Key);
}
else
{
if (_Key.Length > 8)
{
_Key = _Key.Substring(0, 8);
}
else
{
for (int i = 8; i < _Key.Length; i--)
{
_Key += "0";
}
}
}
if (null == this._IV)
{
DesHash.GenerateIV();
_IV = Encoding.ASCII.GetString(DesHash.IV);
}
else
{
if (_IV.Length > 8)
{
_IV = _IV.Substring(0, 8);
}
else
{
for (int i = 8; i < _IV.Length; i--)
{
_IV += "0";
}
}
}
#endregion
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer);
ICryptoTransform ct = DesHash.CreateDecryptor(Encoding.ASCII.GetBytes(this._Key), Encoding.ASCII.GetBytes(this._IV));
DesHash.Clear();
CryptoStream cs = new CryptoStream(ms, ct, CryptoStreamMode.Read);
System.IO.StreamReader sw = new System.IO.StreamReader(cs);
return(sw.ReadToEnd());
}
catch (System.Exception e)
{
throw new System.Exception("解密数据出错,详细原因：" + e.Message);
}
}
private static string pepperHash = "f7&eroisldkKDSlsaoei3(djfoOSIdkdleD24dkd"; // Do Not Change
/// <summary>
/// Encrypt the given string using AES. The string can be decrypted using
/// DecryptStringAES(). The sharedSecret parameters must match.
/// </summary>
/// <param name="plainText">The text to encrypt.</param>
/// <param name="sharedSecret">A password used to generate a key for encryption.</param>
public string EncryptStringAES(string plainTextInp, string sharedSecret, string inpSalt = null, int intSomeValue = 0)
{
string plainText = plainTextInp.Trim();
if (string.IsNullOrEmpty(plainText))
{
throw new ArgumentNullException("plainText");
}
if (string.IsNullOrEmpty(sharedSecret))
{
throw new ArgumentNullException("sharedSecret");
}
if (!string.IsNullOrEmpty(inpSalt))
{
//System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
//salt = encoding.GetBytes(inpSalt);
salt = Encoding.ASCII.GetBytes(inpSalt + pepperEnc);
//salt = Encoding.ASCII.GetBytes(inpSalt);
}
byte[] encryptedData;
string outStr = null; // Encrypted string to return
RijndaelManaged aesAlg = null; // RijndaelManaged object used to encrypt the data.
try
{
// generate the key from the shared secret and the salt
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, salt);
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Padding = PaddingMode.Zeros;
aesAlg.BlockSize = 256; // if want interoperability with AES then need block size of 128
aesAlg.KeySize = 256;
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
aesAlg.IV = key.GetBytes(aesAlg.BlockSize / 8);
// Create an encryptor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
//csEncrypt.FlushFinalBlock();
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
swEncrypt.Flush();
}
}
msEncrypt.Close();
if (intSomeValue == 1)
{
outStr = Convert.ToBase64String(msEncrypt.ToArray());
}
else
{
encryptedData = msEncrypt.ToArray();
SoapHexBinary shb = new SoapHexBinary(encryptedData);
outStr = shb.ToString();
}
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
// Return the encrypted bytes from the memory stream.
return(outStr);
}
private async static Task File(string inFile, string outFile, RSACryptoServiceProvider key)
{
RSACryptoServiceProvider rsaPrivateKey = key;
// Create instance of AesManaged for
// symetric decryption of the data.
using (AesManaged aesManaged = new AesManaged())
{
aesManaged.KeySize = 256;
aesManaged.BlockSize = 128;
aesManaged.Mode = CipherMode.CBC;
// Create byte arrays to get the length of
// the encrypted key and IV.
// These values were stored as 4 bytes each
// at the beginning of the encrypted package.
byte[] LenK = new byte[4];
byte[] LenIV = new byte[4];
// Consruct the file name for the decrypted file.
// Use FileStream objects to read the encrypted
// file (inFs) and save the decrypted file (outFs).
using (FileStream inFs = new FileStream(inFile, FileMode.Open))
{
inFs.Seek(0, SeekOrigin.Begin);
inFs.Seek(0, SeekOrigin.Begin);
await inFs.ReadAsync(LenK, 0, 3);
inFs.Seek(4, SeekOrigin.Begin);
await inFs.ReadAsync(LenIV, 0, 3);
// Convert the lengths to integer values.
int lenK = BitConverter.ToInt32(LenK, 0);
int lenIV = BitConverter.ToInt32(LenIV, 0);
// Determine the start postition of
// the ciphter text (startC)
// and its length(lenC).
int startC = lenK + lenIV + 8;
int lenC = (int)inFs.Length - startC;
// Create the byte arrays for
// the encrypted AesManaged key,
// the IV, and the cipher text.
byte[] KeyEncrypted = new byte[lenK];
byte[] IV = new byte[lenIV];
// Extract the key and IV
// starting from index 8
// after the length values.
inFs.Seek(8, SeekOrigin.Begin);
await inFs.ReadAsync(KeyEncrypted, 0, lenK);
inFs.Seek(8 + lenK, SeekOrigin.Begin);
await inFs.ReadAsync(IV, 0, lenIV);
// Use RSACryptoServiceProvider
// to decrypt the AesManaged key.
byte[] KeyDecrypted = rsaPrivateKey.Decrypt(KeyEncrypted, false);
// Decrypt the key.
using (ICryptoTransform transform = aesManaged.CreateDecryptor(KeyDecrypted, IV))
{
// Decrypt the cipher text from
// from the FileSteam of the encrypted
// file (inFs) into the FileStream
// for the decrypted file (outFs).
using (FileStream outFs = new FileStream(outFile, FileMode.Create))
{
int count = 0;
int offset = 0;
int blockSizeBytes = aesManaged.BlockSize / 8;
byte[] data = new byte[blockSizeBytes];
// By decrypting a chunk a time,
// you can save memory and
// accommodate large files.
// Start at the beginning
// of the cipher text.
inFs.Seek(startC, SeekOrigin.Begin);
using (CryptoStream outStreamDecrypted = new CryptoStream(outFs, transform, CryptoStreamMode.Write))
{
do
{
count = await inFs.ReadAsync(data, 0, blockSizeBytes);
offset += count;
await outStreamDecrypted.WriteAsync(data, 0, count);
}while (count > 0);
}
}
}
}
}
}
private static Stream Encrypt(Stream stream, ExchangePublicKey publicKey)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (publicKey == null)
{
throw new ArgumentNullException(nameof(publicKey));
}
try
{
RecyclableMemoryStream outStream = null;
try
{
outStream = new RecyclableMemoryStream(_bufferManager);
Varint.SetUInt64(outStream, (uint)ConvertCryptoAlgorithm.Aes256);
var cryptoKey = new byte[32];
var iv = new byte[32];
using (var random = RandomNumberGenerator.Create())
{
random.GetBytes(cryptoKey);
random.GetBytes(iv);
}
{
var encryptedBuffer = Exchange.Encrypt(publicKey, cryptoKey);
Varint.SetUInt64(outStream, (uint)encryptedBuffer.Length);
outStream.Write(encryptedBuffer, 0, encryptedBuffer.Length);
}
outStream.Write(iv, 0, iv.Length);
using (var aes = Aes.Create())
{
aes.KeySize = 256;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
using (var inStream = new WrapperStream(stream))
using (var cs = new CryptoStream(inStream, aes.CreateEncryptor(cryptoKey, iv), CryptoStreamMode.Read))
using (var safeBuffer = _bufferManager.CreateSafeBuffer(1024 * 4))
{
int length;
while ((length = cs.Read(safeBuffer.Value, 0, safeBuffer.Value.Length)) > 0)
{
outStream.Write(safeBuffer.Value, 0, length);
}
}
}
outStream.Seek(0, SeekOrigin.Begin);
}
catch (Exception)
{
if (outStream != null)
{
outStream.Dispose();
}
throw;
}
return(outStream);
}
catch (Exception e)
{
throw new ArgumentException(e.Message, e);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
}
public static byte[] SimpleEncrypt(byte[] secretMessage, byte[] cryptKey, byte[] authKey, byte[] nonSecretPayload = null)
{
//User Error Checks
if (cryptKey == null || cryptKey.Length != KeyBitSize / 8)
throw new ArgumentException(String.Format("Key needs to be {0} bit!", KeyBitSize), "cryptKey");
if (authKey == null || authKey.Length != KeyBitSize / 8)
throw new ArgumentException(String.Format("Key needs to be {0} bit!", KeyBitSize), "authKey");
if (secretMessage == null || secretMessage.Length < 1)
throw new ArgumentException("Secret Message Required!", "secretMessage");
//non-secret payload optional
nonSecretPayload = nonSecretPayload ?? new byte[] { };
byte[] cipherText;
byte[] iv;
using (var aes = new AesManaged
{
KeySize = KeyBitSize,
BlockSize = BlockBitSize,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
})
{
//Use random IV
aes.GenerateIV();
iv = aes.IV;
using (var encrypter = aes.CreateEncryptor(cryptKey, iv))
using (var cipherStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(cipherStream, encrypter, CryptoStreamMode.Write))
using (var binaryWriter = new BinaryWriter(cryptoStream))
{
//Encrypt Data
binaryWriter.Write(secretMessage);
}
cipherText = cipherStream.ToArray();
}
}
//Assemble encrypted message and add authentication
using (var hmac = new HMACSHA256(authKey))
using (var encryptedStream = new MemoryStream())
{
using (var binaryWriter = new BinaryWriter(encryptedStream))
{
//Prepend non-secret payload if any
binaryWriter.Write(nonSecretPayload);
//Prepend IV
binaryWriter.Write(iv);
//Write Ciphertext
binaryWriter.Write(cipherText);
binaryWriter.Flush();
//Authenticate all data
var tag = hmac.ComputeHash(encryptedStream.ToArray());
//Postpend tag
binaryWriter.Write(tag);
}
return encryptedStream.ToArray();
}
}
/// <summary>
/// Decrypt the given string. Assumes the string was encrypted using
/// EncryptStringAES(), using an identical sharedSecret.
/// </summary>
/// <param name="cipherText">The text to decrypt.</param>
/// <param name="sharedSecret">A password used to generate a key for decryption.</param>
///
public static string DecryptStringAES(string cipherText, string sharedSecret)
{
if (string.IsNullOrEmpty(cipherText))
{
throw new ArgumentNullException("cipherText");
}
if (string.IsNullOrEmpty(sharedSecret))
{
throw new ArgumentNullException("sharedSecret");
}
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged aesAlg = null;
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
try
{
// generate the key from the shared secret and the salt
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, _salt);
// Create the streams used for decryption.
byte[] bytes = Convert.FromBase64String(cipherText);
using (MemoryStream msDecrypt = new MemoryStream(bytes))
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
// Get the initialization vector from the encrypted stream
aesAlg.IV = ReadByteArray(msDecrypt);
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
return(plaintext);
}
// This is the only method about exchange data between this software and AirVPN infrastructure.
// We don't use SSL. Useless layer in our case, and we need to fetch hostname and direct IP that don't permit common-name match.
// 'S' is the AES 256 bit one-time session key, crypted with a RSA 4096 public-key.
// 'D' is the data from the client to our server, crypted with the AES.
// The server answer is XML decrypted with the same AES session.
public static XmlDocument FetchUrl(string authPublicKey, string url, Dictionary <string, string> parameters)
{
// AES
using (RijndaelManaged rijAlg = new RijndaelManaged())
{
rijAlg.KeySize = 256;
rijAlg.GenerateKey();
rijAlg.GenerateIV();
// Generate S
// Bug workaround: Xamarin 6.1.2 macOS throw an 'Default constructor not found for type System.Diagnostics.FilterElement' error.
// in 'new System.Xml.Serialization.XmlSerializer', so i avoid that.
/*
* StringReader sr = new System.IO.StringReader(authPublicKey);
* System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(RSAParameters));
* RSAParameters publicKey = (RSAParameters)xs.Deserialize(sr);
*/
RSAParameters publicKey = new RSAParameters();
XmlDocument docAuthPublicKey = new XmlDocument();
docAuthPublicKey.LoadXml(authPublicKey);
publicKey.Modulus = Convert.FromBase64String(docAuthPublicKey.DocumentElement["Modulus"].InnerText);
publicKey.Exponent = Convert.FromBase64String(docAuthPublicKey.DocumentElement["Exponent"].InnerText);
Dictionary <string, byte[]> assocParamS = new Dictionary <string, byte[]>();
assocParamS["key"] = rijAlg.Key;
assocParamS["iv"] = rijAlg.IV;
byte[] bytesParamS = null;
using (RSACryptoServiceProvider csp = new RSACryptoServiceProvider())
{
csp.ImportParameters(publicKey);
bytesParamS = csp.Encrypt(UtilsCore.AssocToUtf8Bytes(assocParamS), false);
}
// Generate D
byte[] aesDataIn = UtilsCore.AssocToUtf8Bytes(parameters);
byte[] bytesParamD = null;
{
MemoryStream aesCryptStream = null;
CryptoStream aesCryptStream2 = null;
try
{
aesCryptStream = new MemoryStream();
using (ICryptoTransform aesEncryptor = rijAlg.CreateEncryptor())
{
aesCryptStream2 = new CryptoStream(aesCryptStream, aesEncryptor, CryptoStreamMode.Write);
aesCryptStream2.Write(aesDataIn, 0, aesDataIn.Length);
aesCryptStream2.FlushFinalBlock();
bytesParamD = aesCryptStream.ToArray();
}
}
finally
{
if (aesCryptStream2 != null)
{
aesCryptStream2.Dispose();
}
else if (aesCryptStream != null)
{
aesCryptStream.Dispose();
}
}
}
// HTTP Fetch
HttpRequest request = new HttpRequest();
request.Url = url;
request.Parameters["s"] = UtilsString.Base64Encode(bytesParamS);
request.Parameters["d"] = UtilsString.Base64Encode(bytesParamD);
HttpResponse response = Engine.Instance.FetchUrl(request);
try
{
byte[] fetchResponse = response.BufferData;
byte[] fetchResponsePlain = null;
MemoryStream aesDecryptStream = null;
CryptoStream aesDecryptStream2 = null;
// Decrypt answer
try
{
aesDecryptStream = new MemoryStream();
using (ICryptoTransform aesDecryptor = rijAlg.CreateDecryptor())
{
aesDecryptStream2 = new CryptoStream(aesDecryptStream, aesDecryptor, CryptoStreamMode.Write);
aesDecryptStream2.Write(fetchResponse, 0, fetchResponse.Length);
aesDecryptStream2.FlushFinalBlock();
fetchResponsePlain = aesDecryptStream.ToArray();
}
}
finally
{
if (aesDecryptStream2 != null)
{
aesDecryptStream2.Dispose();
}
else if (aesDecryptStream != null)
{
aesDecryptStream.Dispose();
}
}
string finalData = System.Text.Encoding.UTF8.GetString(fetchResponsePlain);
XmlDocument doc = new XmlDocument();
doc.LoadXml(finalData);
return(doc);
}
catch (Exception ex)
{
string message = "";
if (response.GetHeader("location") != "")
{
message = MessagesFormatter.Format(Messages.ManifestFailedUnexpected302, response.GetHeader("location"));
}
else
{
message = ex.Message + " - " + response.GetLineReport();
}
throw new Exception(message);
}
}
}
private List <DomainUserViewModel> FindAllADUsers(int id, string userName)// GetAllADUsers(int id, string UseName)
{
try
{
string cipherText = "";
IQueryable <DomainSetting> domainSetting = _context.DomainSetting.Where(w => w.Id == id);
var domain = domainSetting.Select(w => new DomainSetting
{
UserName = w.UserName,
Server = w.Server,
Title = w.Title,
Password = w.Password
}).FirstOrDefault();
string EncryptionKey = "MAKV2SPBNI99212";
byte[] cipherBytes = Convert.FromBase64String(domain.Password);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = Encoding.Unicode.GetString(ms.ToArray());
}
}
List <DomainUserViewModel> lstADUsers = new List <DomainUserViewModel>();
DomainUserViewModel objSurveyUsers = new DomainUserViewModel();
DomainSettingViewModel SelectAll = new DomainSettingViewModel();
string dcString = "";
string rootNode = "";
string[] arrString;
arrString = domain.Title.Split('.');
if (arrString.Length == 1)
{
dcString = "dc=" + domain.Title + "";
rootNode = arrString[0];
}
else
{
for (int i = 0; i != arrString.Length; i++)
{
dcString += "dc=" + arrString[i].ToString() + ",";
}
if (arrString.Length == 3)
{
rootNode = arrString[1].ToString();
}
else if (arrString.Length == 2)
{
rootNode = arrString[0].ToString();
}
dcString = dcString.Substring(0, dcString.Length - 1);
}
try
{
string DomainPath = "LDAP://" + domain.Server + "/" + dcString;
System.DirectoryServices.DirectoryEntry searchRoot = new System.DirectoryServices.DirectoryEntry(DomainPath);
searchRoot.Username = domain.UserName;
searchRoot.Password = cipherText;
DirectorySearcher search = new DirectorySearcher(searchRoot);
if (userName == "*")
{
search.Filter = $"(objectClass=user)";
}
else
{
userName = userName.Split("@")[0];
search.Filter = $"(samaccountname=*{userName}*)";
}
search.PropertiesToLoad.Add("samaccountname");
search.PropertiesToLoad.Add("mail");
search.PropertiesToLoad.Add("usergroup");
search.PropertiesToLoad.Add("displayname"); //first name
search.PropertiesToLoad.Add("givenname"); //first name
search.PropertiesToLoad.Add("sn"); //first name
SearchResult resultFetch;
SearchResultCollection resultCol = search.FindAll();
if (resultCol != null)
{
for (int counter = 0; counter < resultCol.Count; counter++)
{
string UserNameEmailString = string.Empty;
resultFetch = resultCol[counter];
if (resultFetch.Properties.Contains("samaccountname"))
{
objSurveyUsers = new DomainUserViewModel();
if (resultFetch.Properties.Contains("mail"))
{
objSurveyUsers.Email = (String)resultFetch.Properties["mail"][0];
}
else
{
// objSurveyUsers.Email = (String)resultFetch.Properties["samaccountname"][0] + id.ToString() + "@Pointer.com";
}
if (resultFetch.Properties.Contains("displayname"))
{
objSurveyUsers.DisplayName = (String)resultFetch.Properties["displayname"][0];
}
else
{
objSurveyUsers.DisplayName = (String)resultFetch.Properties["samaccountname"][0];
}
objSurveyUsers.UserName = (String)resultFetch.Properties["samaccountname"][0];
if (resultFetch.Properties.Contains("givenname"))
{
objSurveyUsers.FirstName = (String)resultFetch.Properties["givenname"][0];
}
else
{
objSurveyUsers.FirstName = (String)resultFetch.Properties["samaccountname"][0];
}
if (resultFetch.Properties.Contains("sn"))
{
objSurveyUsers.LastName = (String)resultFetch.Properties["sn"][0];
}
else
{
objSurveyUsers.LastName = (String)resultFetch.Properties["samaccountname"][0];
}
objSurveyUsers.dcString = dcString;
lstADUsers.Add(objSurveyUsers);
}
}
}
}
catch (Exception ex)
{
}
return(lstADUsers);
}
catch (Exception e)
{
Log.Error(e, e.Message);
return(null);
}
}
public SaveSystemSymmetricCryptoStream(CryptoStream cryptoStream, SymmetricAlgorithm algorithm, ICryptoTransform cryptoTransform) : base(cryptoStream)
{
this.Algorithm = algorithm;
this.CryptoTransform = cryptoTransform;
}
/// <summary>
/// Writes the value of 'LicenseString' as an encrypted stream to the file:stream specified
/// by 'currentFile'.
/// </summary>
/// <param name="currentFile">Fully qualified path to the alternate stream</param>
/// <param name="LicenseString">The string value to encrypt and write to the alternate stream</param>
public static void WriteAlternateStreamEncrypted(string currentFile, string LicenseString)
{
RC2CryptoServiceProvider rc2 = null;
CryptoStream cs = null;
MemoryStream ms = null;
uint count = 0;
IntPtr buffer = IntPtr.Zero;
IntPtr hFile = IntPtr.Zero;
try
{
Encoding enc = Encoding.Unicode;
byte[] ba = enc.GetBytes(LicenseString);
ms = new MemoryStream();
rc2 = new RC2CryptoServiceProvider();
rc2.Key = GetBytesFromHexString("7a6823a42a3a3ae27057c647db812d0");
rc2.IV = GetBytesFromHexString("827d961224d99b2d");
cs = new CryptoStream(ms, rc2.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(ba, 0, ba.Length);
cs.FlushFinalBlock();
buffer = Marshal.AllocHGlobal(1000 * sizeof(char));
ZeroMemory(buffer, 1000 * sizeof(char));
uint nBytes = (uint)ms.Length;
Marshal.Copy(ms.GetBuffer(), 0, buffer, (int)nBytes);
DeleteFile(currentFile);
hFile = CreateFile(currentFile, Win32ApiConstant.GENERIC_WRITE, 0, IntPtr.Zero,
Win32ApiConstant.CREATE_ALWAYS, 0, IntPtr.Zero);
if (-1 != hFile.ToInt32())
{
bool bRtn = WriteFile(hFile, buffer, nBytes, out count, 0);
}
else
{
Exception excptn = new Win32Exception(Marshal.GetLastWin32Error());
if (!excptn.Message.Contains("cannot find the file"))
{
throw excptn;
}
}
}
catch (Exception exception)
{
Console.WriteLine("WriteAlternateStreamEncrypted()");
Console.WriteLine(exception.Message);
}
finally
{
CloseHandle(hFile);
hFile = IntPtr.Zero;
if (cs != null)
{
cs.Close();
cs.Dispose();
}
rc2 = null;
if (ms != null)
{
ms.Close();
ms.Dispose();
}
if (buffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(buffer);
}
}
}
///
/// Decrypts specified ciphertext using Rijndael symmetric key algorithm.
///
///
/// Base64-formatted ciphertext value.
///
///
/// Passphrase from which a pseudo-random password will be derived. The
/// derived password will be used to generate the encryption key.
/// Passphrase can be any string. In this example we assume that this
/// passphrase is an ASCII string.
///
///
/// Salt value used along with passphrase to generate password. Salt can
/// be any string. In this example we assume that salt is an ASCII string.
///
///
/// Hash algorithm used to generate password. Allowed values are: “MD5? and
/// “SHA1?. SHA1 hashes are a bit slower, but more secure than MD5 hashes.
///
///
/// Number of iterations used to generate password. One or two iterations
/// should be enough.
///
///
/// Initialization vector (or IV). This value is required to encrypt the
/// first block of plaintext data. For RijndaelManaged class IV must be
/// exactly 16 ASCII characters long.
///
///
/// Size of encryption key in bits. Allowed values are: 128, 192, and 256.
/// Longer keys are more secure than shorter keys.
///
///
/// Decrypted string value.
///
///
/// Most of the logic in this function is similar to the Encrypt
/// logic. In order for decryption to work, all parameters of this function
/// – except cipherText value – must match the corresponding parameters of
/// the Encrypt function which was called to generate the
/// ciphertext.
///
public static string Decrypt(string cipherText, string iVector)
{
initVector = iVector;
// Convert strings defining encryption key characteristics into byte
// arrays. Let us assume that strings only contain ASCII codes.
// If strings include Unicode characters, use Unicode, UTF7, or UTF8
// encoding.
byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);
// Convert our ciphertext into a byte array.
byte[] cipherTextBytes = Convert.FromBase64String(cipherText);
// First, we must create a password, from which the key will be
// derived. This password will be generated from the specified
// passphrase and salt value. The password will be created using
// the specified hash algorithm. Password creation can be done in
// several iterations.
PasswordDeriveBytes password = new PasswordDeriveBytes(
passPhrase,
saltValueBytes,
hashAlgorithm,
passwordIterations);
// Use the password to generate pseudo-random bytes for the encryption
// key. Specify the size of the key in bytes (instead of bits).
byte[] keyBytes = password.GetBytes(keySize / 8);
// Create uninitialized Rijndael encryption object.
RijndaelManaged symmetricKey = new RijndaelManaged();
// It is reasonable to set encryption mode to Cipher Block Chaining
// (CBC). Use default options for other symmetric key parameters.
symmetricKey.Mode = CipherMode.CBC;
// Generate decryptor from the existing key bytes and initialization
// vector. Key size will be defined based on the number of the key
// bytes.
ICryptoTransform decryptor = symmetricKey.CreateDecryptor(
keyBytes,
initVectorBytes);
// Define memory stream which will be used to hold encrypted data.
MemoryStream memoryStream = new MemoryStream(cipherTextBytes);
// Define cryptographic stream (always use Read mode for encryption).
CryptoStream cryptoStream = new CryptoStream(memoryStream,
decryptor,
CryptoStreamMode.Read);
// Since at this point we don’t know what the size of decrypted data
// will be, allocate the buffer long enough to hold ciphertext;
// plaintext is never longer than ciphertext.
byte[] plainTextBytes = new byte[cipherTextBytes.Length];
// Start decrypting.
int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
// Close both streams.
memoryStream.Close();
cryptoStream.Close();
// Convert decrypted data into a string.
// Let us assume that the original plaintext string was UTF8-encoded.
string plainText = Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
// Return decrypted string.
return(plainText);
}
/// <summary>
/// Decrypt the Text
/// </summary>
/// <param name="value">Value to be decrypted</param>
/// <returns>Decrypted Value</returns>
public byte[] Decrypt(byte[] value)
{
byte[] cipherText = value;
byte[] retVal = null;
// TDeclare the streams used
// to decrypt to an in memory
// array of bytes.
MemoryStream msDecrypt = null;
CryptoStream csDecrypt = null;
StreamReader srDecrypt = null;
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged aesAlg = null;
// Declare the string used to hold
// the decrypted text.
//char[] plaintext = null;
try
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = SecureKey.key;
aesAlg.IV = SecureKey.vector;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
msDecrypt = new MemoryStream(cipherText);
csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
srDecrypt = new StreamReader(csDecrypt);
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
//plaintext = srDecrypt.ReadToEnd().ToCharArray();
//retVal = srDecrypt.CurrentEncoding.GetBytes(srDecrypt.ReadToEnd());
retVal = CharArrayToByteArray(srDecrypt.ReadToEnd().ToCharArray());
}
finally
{
// Clean things up.
// Close the streams.
if (srDecrypt != null)
{
srDecrypt.Close();
}
if (csDecrypt != null)
{
csDecrypt.Close();
}
if (msDecrypt != null)
{
msDecrypt.Close();
}
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
//log.Log(Level.ALL, value + " => " + plaintext);
return(retVal);
}
public static byte[] SimpleDecrypt(byte[] encryptedMessage, byte[] cryptKey, byte[] authKey, int nonSecretPayloadLength = 0)
{
//Basic Usage Error Checks
if (cryptKey == null || cryptKey.Length != KeyBitSize / 8)
throw new ArgumentException(String.Format("CryptKey needs to be {0} bit!", KeyBitSize), "cryptKey");
if (authKey == null || authKey.Length != KeyBitSize / 8)
throw new ArgumentException(String.Format("AuthKey needs to be {0} bit!", KeyBitSize), "authKey");
if (encryptedMessage == null || encryptedMessage.Length == 0)
throw new ArgumentException("Encrypted Message Required!", "encryptedMessage");
using (var hmac = new HMACSHA256(authKey))
{
var sentTag = new byte[hmac.HashSize / 8];
//Calculate Tag
var calcTag = hmac.ComputeHash(encryptedMessage, 0, encryptedMessage.Length - sentTag.Length);
var ivLength = (BlockBitSize / 8);
//if message length is to small just return null
if (encryptedMessage.Length < sentTag.Length + nonSecretPayloadLength + ivLength)
return null;
//Grab Sent Tag
Array.Copy(encryptedMessage, encryptedMessage.Length - sentTag.Length, sentTag, 0, sentTag.Length);
//Compare Tag with constant time comparison
var compare = 0;
for (var i = 0; i < sentTag.Length; i++)
compare |= sentTag[i] ^ calcTag[i];
//if message doesn't authenticate return null
if (compare != 0)
return null;
using (var aes = new AesManaged
{
KeySize = KeyBitSize,
BlockSize = BlockBitSize,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
})
{
//Grab IV from message
var iv = new byte[ivLength];
Array.Copy(encryptedMessage, nonSecretPayloadLength, iv, 0, iv.Length);
using (var decrypter = aes.CreateDecryptor(cryptKey, iv))
using (var plainTextStream = new MemoryStream())
{
using (var decrypterStream = new CryptoStream(plainTextStream, decrypter, CryptoStreamMode.Write))
using (var binaryWriter = new BinaryWriter(decrypterStream))
{
//Decrypt Cipher Text from Message
binaryWriter.Write(
encryptedMessage,
nonSecretPayloadLength + iv.Length,
encryptedMessage.Length - nonSecretPayloadLength - iv.Length - sentTag.Length
);
}
//Return Plain Text
return plainTextStream.ToArray();
}
}
}
}
private void personSendBtn_Click(object sender, EventArgs e)
{
bool person1To2 = int.Parse(((Button)sender).Tag.ToString()) == 1;
string messageToSend = person1To2 ? txt_Giden_Mesaj_Kul_1.Text : txt_Giden_Mesaj_Kul_2.Text;
if (person1PublicKey == null || person1PublicKey.Length <= 0)
{
GenerateKeys();
}
// Gönderiliyor
using (Aes aes = new AesCryptoServiceProvider())
{
aes.Key = commonKey;
if (IV == null || IV.Length <= 0)
{
IV = aes.IV;
}
else
{
aes.IV = IV;
}
ECDiffieHellmanCng_Class.txt_Ortak_Anahtar = Convert.ToBase64String(IV);
txt_Baslatma_Vektoru_IV.Text = Convert.ToBase64String(IV);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] plainTextMessage = Encoding.UTF8.GetBytes(messageToSend);
cs.Write(plainTextMessage, 0, plainTextMessage.Length);
cs.Close();
if (person1To2)
{
encryptedMessage1 = ms.ToArray();
txt_Sifreli_Gelen_Mesaj_kul_2.Text = Convert.ToBase64String(encryptedMessage1);
}
else
{
encryptedMessage2 = ms.ToArray();
txt_Sifreli_Gelen_Mesaj_kul_1.Text = Convert.ToBase64String(encryptedMessage2);
}
}
}
}
// Alınıyor
using (Aes aes = new AesCryptoServiceProvider())
{
aes.Key = commonKey;
aes.IV = IV;
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Write))
{
if (person1To2)
{
cs.Write(encryptedMessage1, 0, encryptedMessage1.Length);
}
else
{
cs.Write(encryptedMessage2, 0, encryptedMessage2.Length);
}
cs.Close();
string receivedMessage = Encoding.UTF8.GetString(ms.ToArray());
if (person1To2)
{
txt_Gelen_Mesaj_Kul_2.Text = receivedMessage;
}
else
{
txt_Gelen_Mesaj_Kul_1.Text = receivedMessage;
}
}
}
}
}
/// <summary>
/// Encrypt the text
/// </summary>
/// <param name="value">Value to be encrypted</param>
/// <returns>Encrypted Value</returns>
public string Encrypt(string value)
{
// Declare the streams used
// to encrypt to an in memory
// array of bytes.
MemoryStream msEncrypt = null;
CryptoStream csEncrypt = null;
StreamWriter swEncrypt = null;
// Declare the RijndaelManaged object
// used to encrypt the data.
RijndaelManaged aesAlg = null;
try
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = SecureKey.key;
aesAlg.IV = SecureKey.vector;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
msEncrypt = new MemoryStream();
csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
swEncrypt = new StreamWriter(csEncrypt);
//Write all data to the stream.
swEncrypt.Write(value);
//int chunkSize = 3145728;
//StringBuilder chunkData = null;
//for (int i = 0; i < value.Length; i += chunkSize)
//{
// chunkData = new StringBuilder(Util.GetValueOfString(value.Substring(i, chunkSize)));
// swEncrypt.Write(chunkData.ToString());
//}
}
finally
{
// Clean things up.
// Close the streams.
if (swEncrypt != null)
{
swEncrypt.Close();
}
if (csEncrypt != null)
{
csEncrypt.Close();
}
if (msEncrypt != null)
{
msEncrypt.Close();
}
// Clear the RijndaelManaged object.
if (aesAlg != null)
{
aesAlg.Clear();
}
}
// Return the encrypted bytes from the memory stream.
byte[] bFinal = msEncrypt.ToArray();
if (swEncrypt != null)
{
swEncrypt = null;
}
if (csEncrypt != null)
{
csEncrypt = null;
}
if (msEncrypt != null)
{
msEncrypt = null;
}
string encString = ByteArrayToString(bFinal);
log.Log(Level.ALL, value + " => " + encString);
return(encString);
}
public static string EncryptRijndael(string original)
{
byte[] encrypted;
byte[] toEncrypt;
UTF8Encoding utf8Converter = new UTF8Encoding();
toEncrypt = utf8Converter.GetBytes(original);
RijndaelManaged myRijndael = new RijndaelManaged();
MemoryStream ms = new MemoryStream();
ICryptoTransform encryptor = myRijndael.CreateEncryptor(Key, IV);
CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write);
cs.Write(toEncrypt, 0, toEncrypt.Length);
cs.FlushFinalBlock();
encrypted = ms.ToArray();
string encryptedString = Convert.ToBase64String(encrypted);
return encryptedString;
}
public static string Decrypt(string cipherText)
{
try
{
string EncryptionKey = "MAKV2SPBNI99212";
cipherText = cipherText.Replace(" ", "+");
byte[] cipherBytes = Convert.FromBase64String(cipherText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = Encoding.Unicode.GetString(ms.ToArray());
}
}
return cipherText;
}
catch (Exception ex)
{
return "0";
}
}
