/// <summary>
/// Encrypts a string
/// </summary>
/// <param name="plaintext">Text to be encrypted</param>
/// <param name="password">Password to encrypt with</param>
/// <param name="salt">Salt to encrypt with</param>
/// <returns>An encrypted string</returns>
public static string Encrypt(string plaintext, string password, string salt)
{
string Result = "";
PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Encoding.ASCII.GetBytes(password), Encoding.ASCII.GetBytes(salt), "SHA512", 12345);
using (RijndaelManaged SymmetricKey = new RijndaelManaged())
{
SymmetricKey.Mode = CipherMode.CBC;
using (ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(DerivedPassword.GetBytes(32), DerivedPassword.GetBytes(16)))
{
using (MemoryStream MemStream = new MemoryStream())
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write))
{
byte[] PlainTextBytes = Encoding.ASCII.GetBytes(plaintext);
CryptoStream.Write(PlainTextBytes, 0, PlainTextBytes.Length);
CryptoStream.FlushFinalBlock();
Result = Convert.ToBase64String(MemStream.ToArray());
}
}
}
}
return Result;
}
public static string Encrypt(string plainText, string passPhrase)
{
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
using (PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (RijndaelManaged symmetricKey = new RijndaelManaged())
{
symmetricKey.Mode = CipherMode.CBC;
using (ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
byte[] cipherTextBytes = memoryStream.ToArray();
return Convert.ToBase64String(cipherTextBytes);
}
}
}
}
}
}
protected static 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);
}
}
public static string Decrypt(string text)
{
string decryptedData = null;
if (!string.IsNullOrEmpty(text)) {
var rijndaelCipher = new RijndaelManaged();
byte[] encryptedData = Convert.FromBase64String(text);
byte[] salt = Encoding.ASCII.GetBytes(Password.Length.ToString());
//Making of the key for decryption
var secretKey = new PasswordDeriveBytes(Password, salt);
//Creates a symmetric Rijndael decryptor object.
ICryptoTransform decryptor = rijndaelCipher.CreateDecryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
var memoryStream = new MemoryStream(encryptedData);
//Defines the cryptographics stream for decryption.THe stream contains decrpted data
var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
byte[] plainText = new byte[encryptedData.Length];
int decryptedCount = cryptoStream.Read(plainText, 0, plainText.Length);
memoryStream.Close();
cryptoStream.Close();
//Converting to string
decryptedData = Encoding.Unicode.GetString(plainText, 0, decryptedCount);
}
return decryptedData;
}
private static bool WriteObjectToXml(string path, object ob)
{
try
{
using (Stream fs = new FileStream(path, FileMode.Create))
{
var rm = new RijndaelManaged();
rm.BlockSize = rm.KeySize;
var secretKey = new PasswordDeriveBytes(Encoding.Unicode.GetBytes(Salt),
Encoding.ASCII.GetBytes(Salt));
// ReSharper disable once CSharpWarnings::CS0618
rm.Key = secretKey.GetBytes(rm.KeySize/8);
rm.IV = rm.Key;
ICryptoTransform desEncrypt = rm.CreateEncryptor();
using (var cs = new CryptoStream(fs, desEncrypt, CryptoStreamMode.Write))
{
var xmlser = new XmlSerializer(typeof (Data));
xmlser.Serialize(cs, ob);
}
desEncrypt.Dispose();
}
return true;
}
catch (Exception ex)
{
Logger.Write(ex.Message);
return false;
}
}
/// <summary>
/// Décrypte une chaine cryptée à partir d'un chiffreur symétrique
/// </summary>
/// <param name="base64String">chaine cryptée</param>
/// <param name="pass">Mot de passe utilisé pour dériver la clé</param>
/// <returns>Chaine décryptée</returns>
private static string Decrypt(string base64String, string pass)
{
string result = string.Empty;
System.Security.Cryptography.TripleDESCryptoServiceProvider des =
new System.Security.Cryptography.TripleDESCryptoServiceProvider();
des.IV = new byte[8];
System.Security.Cryptography.PasswordDeriveBytes pdb =
new System.Security.Cryptography.PasswordDeriveBytes(pass, new byte[0]);
des.Key = pdb.CryptDeriveKey("RC2", "SHA1", 128, new byte[8]);
byte[] encryptedBytes = Convert.FromBase64String(base64String);
using (MemoryStream ms = new MemoryStream(base64String.Length))
{
using (System.Security.Cryptography.CryptoStream decStream =
new System.Security.Cryptography.CryptoStream(ms, des.CreateDecryptor(),
System.Security.Cryptography.CryptoStreamMode.Write))
{
decStream.Write(encryptedBytes, 0, encryptedBytes.Length);
decStream.FlushFinalBlock();
byte[] plainBytes = new byte[ms.Length];
ms.Position = 0;
ms.Read(plainBytes, 0, (int)ms.Length);
result = Encoding.UTF8.GetString(plainBytes);
}
}
return(result);
}
// ************************************** DEBUT 1 *****************************
//public static string Encrypt(string original)
//{
// MD5CryptoServiceProvider hashMd5 = new MD5CryptoServiceProvider();
// byte[] passwordHash = hashMd5.ComputeHash(
// UnicodeEncoding.Unicode.GetBytes(clefDuCryptage));
// TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
// des.Key = passwordHash;
// des.Mode = CipherMode.ECB;
// byte[] buffer = UnicodeEncoding.Unicode.GetBytes(original);
// return UnicodeEncoding.Unicode.GetString(
// des.CreateEncryptor().TransformFinalBlock(buffer, 0, buffer.Length));
//}
//public static String Decrypt(String StringToDecrypt)
//{
// String StringDecrypted = "";
// MD5CryptoServiceProvider hashMd5 = new MD5CryptoServiceProvider();
// byte[] passwordHash = hashMd5.ComputeHash(
// UnicodeEncoding.Unicode.GetBytes(clefDuCryptage));
// TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
// des.Key = passwordHash;
// des.Mode = CipherMode.ECB;
// byte[] buffer = UnicodeEncoding.Unicode.GetBytes(StringToDecrypt);
// StringDecrypted = UnicodeEncoding.Unicode.GetString(
// des.CreateDecryptor().TransformFinalBlock(buffer, 0, buffer.Length));
// return StringDecrypted;
//}
// ************************************** FIN 1 *****************************
// ************************************** DEBUT 2 *****************************
//public static string Encrypt(string input, string key)
//{
// byte[] inputArray = UTF8Encoding.UTF8.GetBytes(input);
// TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider();
// tripleDES.Key = UTF8Encoding.UTF8.GetBytes(key);
// tripleDES.Mode = CipherMode.ECB;
// tripleDES.Padding = PaddingMode.PKCS7;
// ICryptoTransform cTransform = tripleDES.CreateEncryptor();
// byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);
// tripleDES.Clear();
// return Convert.ToBase64String(resultArray, 0, resultArray.Length);
//}
//public static string Decrypt(string input, string key)
//{
// byte[] inputArray = Convert.FromBase64String(input);
// TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider();
// tripleDES.Key = UTF8Encoding.UTF8.GetBytes(key);
// tripleDES.Mode = CipherMode.ECB;
// tripleDES.Padding = PaddingMode.PKCS7;
// ICryptoTransform cTransform = tripleDES.CreateDecryptor();
// byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);
// tripleDES.Clear();
// return UTF8Encoding.UTF8.GetString(resultArray);
//}
// ************************************** FIN 2 *****************************
/// <summary>
/// Crypte une chaine en utilisant un chiffreur symétrique
/// </summary>
/// <param name="plainText">Chaine à crypter</param>
/// <param name="pass">Mot de passe utilisé pour dériver la clé</param>
/// <returns>Chaine cryptée</returns>
public static string Encrypt(string plainText, string pass)
{
string result = string.Empty;
System.Security.Cryptography.TripleDESCryptoServiceProvider des =
new System.Security.Cryptography.TripleDESCryptoServiceProvider();
des.IV = new byte[8];
System.Security.Cryptography.PasswordDeriveBytes pdb =
new System.Security.Cryptography.PasswordDeriveBytes(pass, new byte[0]);
des.Key = pdb.CryptDeriveKey("RC2", "SHA1", 128, new byte[8]);
using (MemoryStream ms = new MemoryStream(plainText.Length * 2))
{
using (System.Security.Cryptography.CryptoStream encStream = new
System.Security.Cryptography.CryptoStream(ms, des.CreateEncryptor(),
System.Security.Cryptography.CryptoStreamMode.Write))
{
byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
encStream.Write(plainBytes, 0, plainBytes.Length);
encStream.FlushFinalBlock();
byte[] encryptedBytes = new byte[ms.Length];
ms.Position = 0;
ms.Read(encryptedBytes, 0, (int)ms.Length);
encStream.Close();
ms.Close();
result = Convert.ToBase64String(encryptedBytes);
}
}
return(result);
}
public static string Encrypt(string plainText)
{
// Encryption operates on byte arrays, not on strings.
byte[] plainTextBytes =
System.Text.Encoding.Unicode.GetBytes(plainText);
// Derive a key from the password.
PasswordDeriveBytes passwordDerivedBytes = new PasswordDeriveBytes(NOT_SECRET_KEY,
new byte[] {0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76});
// Use Rijndael symmetric algorithm to do the encryption.
Rijndael rijndaelAlgorithm = Rijndael.Create();
rijndaelAlgorithm.Key = passwordDerivedBytes.GetBytes(32);
rijndaelAlgorithm.IV = passwordDerivedBytes.GetBytes(16);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndaelAlgorithm.CreateEncryptor(), CryptoStreamMode.Write);
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.Close();
byte[] encryptedBytes = memoryStream.ToArray();
return Convert.ToBase64String(encryptedBytes);
}
public static string Decrypt(string encryptedText)
{
RegistryKey registryKey =
Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\VisualStudio\10.0\PbsEncryptionKey");
var password = (string)registryKey.GetValue("Key");
var passwordDerivedBytes = new PasswordDeriveBytes(password, _salt);
byte[] encryptedTextBytes = Convert.FromBase64String(encryptedText);
using (var memoryStream = new MemoryStream())
{
using (var rijndael = Rijndael.Create())
{
using (
var cryptoTransform = rijndael.CreateDecryptor(passwordDerivedBytes.GetBytes(32),
passwordDerivedBytes.GetBytes(16)))
{
using (
var cryptoStream = new CryptoStream(memoryStream, cryptoTransform,
CryptoStreamMode.Write))
{
cryptoStream.Write(encryptedTextBytes, 0, encryptedTextBytes.Length);
cryptoStream.Close();
return Encoding.Unicode.GetString(memoryStream.ToArray());
}
}
}
}
}
// Decrypt a file into another file using a password
public static void Decrypt(string fileIn, string fileOut, string Password)
{
// First we are going to open the file streams
FileStream fsIn = new FileStream(fileIn, FileMode.Open, FileAccess.Read);
FileStream fsOut = new FileStream(fileOut, FileMode.OpenOrCreate, FileAccess.Write);
// Then we are going to derive a Key and an IV from the Password and create an algorithm
PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
Rijndael alg = Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
// Now create a crypto stream through which we are going to be pumping data.
// Our fileOut is going to be receiving the Decrypted bytes.
CryptoStream cs = new CryptoStream(fsOut, alg.CreateDecryptor(), CryptoStreamMode.Write);
// Now will will initialize a buffer and will be processing the input file in chunks.
// This is done to avoid reading the whole file (which can be huge) into memory.
int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int bytesRead;
do
{
// read a chunk of data from the input file
bytesRead = fsIn.Read(buffer, 0, bufferLen);
// Decrypt it
cs.Write(buffer, 0, bytesRead);
} while (bytesRead != 0);
cs.Close();
fsIn.Close();
}
/// <summary>
/// Decrypts a byte array with a password
/// </summary>
/// <param name="data">Data to decrypt</param>
/// <param name="password">Password to use</param>
/// <param name="paddingMode">Padding mode to use</param>
/// <returns>Decrypted byte array</returns>
/// <exception cref="System.ArgumentNullException">
/// data
/// or
/// password
/// </exception>
/// <exception cref="ArgumentNullException"></exception>
public static byte[] DecryptData(byte[] data, string password, PaddingMode paddingMode)
{
if (data == null || data.Length == 0)
throw new ArgumentNullException("data");
if (password == null)
throw new ArgumentNullException("password");
var pdb = new PasswordDeriveBytes(password, Encoding.UTF8.GetBytes("Salt"));
var rm = new RijndaelManaged { Padding = paddingMode };
ICryptoTransform decryptor = rm.CreateDecryptor(pdb.GetBytes(16), pdb.GetBytes(16));
pdb.Dispose();
using (var msDecrypt = new MemoryStream(data))
using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
// Decrypted bytes will always be less then encrypted bytes, so length of encrypted data will be big enough for buffer.
byte[] fromEncrypt = new byte[data.Length];
// Read as many bytes as possible.
int read = csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
if (read < fromEncrypt.Length)
{
// Return a byte array of proper size.
byte[] clearBytes = new byte[read];
Buffer.BlockCopy(fromEncrypt, 0, clearBytes, 0, read);
return clearBytes;
}
return fromEncrypt;
}
}
public static string Decrypt(string cipherText, string passPhrase)
{
if (cipherText != null && cipherText != "")
{
byte[] cipherTextBytes = Convert.FromBase64String(cipherText);
using (PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (RijndaelManaged symmetricKey = new RijndaelManaged())
{
symmetricKey.Mode = CipherMode.CBC;
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];
int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
}
}
}
}
}
}
return "";
}
public string Decrypt(string cipherText, string password)
{
if (string.IsNullOrEmpty(cipherText))
return cipherText;
try
{
if (System.Web.HttpContext.Current != null)
cipherText = System.Web.HttpContext.Current.Server.UrlDecode(cipherText);
cipherText = cipherText.Replace(" ", "+");
byte[] cipherBytes = Convert.FromBase64String(cipherText);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(password,
new byte[] {0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65,
0x64, 0x76, 0x65, 0x64, 0x65, 0x76});
byte[] decryptedData = Decrypt(cipherBytes,
pdb.GetBytes(32), pdb.GetBytes(16));
return System.Text.Encoding.Unicode.GetString(decryptedData);
}
catch
{
return string.Empty;
}
}
/// <summary>
/// Encrypts a string
/// </summary>
/// <param name="plainText">Text to be encrypted</param>
/// <param name="password">Password to encrypt with</param>
/// <param name="salt">Salt to encrypt with</param>
/// <param name="hashAlgorithm">Can be either SHA1 or MD5</param>
/// <param name="passwordIterations">Number of iterations to do. The number of times the algorithm is run on the text. </param>
/// <param name="initialVector">Needs to be 16 ASCII characters long</param>
/// <param name="keySize">Can be 128, 192, or 256</param>
/// <returns>An encrypted string</returns>
public static string Encrypt(string plainText, string password, string salt = "69ad1bfbd6605f3f6a3011460cdfb9db7757e0f9", string hashAlgorithm = "SHA1", int passwordIterations = 2, string initialVector = "OFRna73m*aze01xY", int keySize = 256)
{
if (string.IsNullOrEmpty(plainText))
return "";
byte[] initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
var derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);
var symmetricKey = new RijndaelManaged {Mode = CipherMode.CBC};
byte[] cipherTextBytes;
using (ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initialVectorBytes))
{
using (MemoryStream memStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
cipherTextBytes = memStream.ToArray();
memStream.Close();
cryptoStream.Close();
}
}
}
symmetricKey.Clear();
return Convert.ToBase64String(cipherTextBytes);
}
public void Ctor_PasswordSaltNull ()
{
PasswordDeriveBytes pdb = new PasswordDeriveBytes ("s3kr3t", null);
Assert.AreEqual ("SHA1", pdb.HashName, "HashName");
Assert.AreEqual (100, pdb.IterationCount, "IterationCount");
Assert.IsNull (pdb.Salt, "Salt");
}
/// <summary>
/// Encrypts a string
/// </summary>
/// <param name="PlainText">Text to be encrypted</param>
/// <param name="Password">Password to encrypt with</param>
/// <param name="Salt">Salt to encrypt with</param>
/// <param name="InitialVector">Needs to be 16 ASCII characters long</param>
/// <param name="HashAlgorithm">Can be either SHA1 or MD5</param>
/// <param name="PasswordIterations">Number of iterations to do</param>
/// <param name="KeySize">Can be 128, 192, or 256</param>
/// <returns>An encrypted bytes</returns>
public static byte[] Encrypt(byte[] PlainText, byte[] Password, byte[] InitialVector,
byte[] Salt)
{
PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, Salt, HASH_ALGORITHM, PASSWORDITERATIONS);
byte[] KeyBytes = DerivedPassword.GetBytes(KEY_SIZE / 8);
RijndaelManaged SymmetricKey = new RijndaelManaged();
SymmetricKey.Mode = CipherMode.CBC;
byte[] CipherTextBytes = null;
using (ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(KeyBytes, InitialVector))
{
using (MemoryStream MemStream = new MemoryStream())
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write))
{
CryptoStream.Write(PlainText, 0, PlainText.Length);
CryptoStream.FlushFinalBlock();
CipherTextBytes = MemStream.ToArray();
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return CipherTextBytes;
//return Encoding.UTF8.GetBytes(Convert.ToBase64String(CipherTextBytes));
}
/// <summary>
/// Encrypt a string into a string using a password. Uses Encrypt(byte[], byte[], byte[])
/// </summary>
public static string Encrypt(string clearText, string Password, bool useUrlEncoding)
{
// First we need to turn the input string into a byte array.
byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
// Then, we need to turn the password into Key and IV
// We are using salt to make it harder to guess our key
// using a dictionary attack -
// trying to guess a password by enumerating all possible words.
PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password,
new byte[] {0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76});
// Now get the key/IV and do the encryption using the function that accepts byte arrays.
// Using PasswordDeriveBytes object we are first getting 32 bytes for the Key
// (the default Rijndael key length is 256bit = 32bytes) and then 16 bytes for the IV.
// IV should always be the block size, which is by default 16 bytes (128 bit) for Rijndael.
// If you are using DES/TripleDES/RC2 the block size is 8 bytes and so should be the IV size.
// You can also read KeySize/BlockSize properties off the algorithm to find out the sizes.
byte[] encryptedData = Encrypt(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
// Now we need to turn the resulting byte array into a string.
// A common mistake would be to use an Encoding class for that.
// It does not work because not all byte values can be represented by characters.
// We are going to be using Base64 encoding that is designed exactly for what we are trying to do.
string data = HttpUtility.UrlEncode(Convert.ToBase64String(encryptedData));
// Optionally URL encode the encrypted data (use if data will be put in URL as URL parameter/querystring).
if (useUrlEncoding) {
data = HttpUtility.UrlEncode(data );
}
return data;
}
public static string Decrypt(string cipherText, string Password)
{
byte[] cipherData = Convert.FromBase64String(cipherText);
PasswordDeriveBytes bytes = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 110, 0x20, 0x4d, 0x65, 100, 0x76, 0x65, 100, 0x65, 0x76 });
byte[] buffer2 = Decrypt(cipherData, bytes.GetBytes(0x20), bytes.GetBytes(0x10));
return Encoding.Unicode.GetString(buffer2);
}
// Decrypt a string into a string using a password
// Uses Decrypt(byte[], byte[], byte[])
public static string Decrypt(string cipherText, string Password)
{
// First we need to turn the input string into a byte array.
// We presume that Base64 encoding was used
byte[] cipherBytes = Convert.FromBase64String(cipherText);
// Then, we need to turn the password into Key and IV
// We are using salt to make it harder to guess our key using a dictionary attack -
// trying to guess a password by enumerating all possible words.
PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76,
0x65, 0x64, 0x65, 0x76
});
// Now get the key/IV and do the decryption using the function that accepts byte arrays.
// Using PasswordDeriveBytes object we are first getting 32 bytes for the Key
// (the default Rijndael key length is 256bit = 32bytes) and then 16 bytes for the IV.
// IV should always be the block size, which is by default 16 bytes (128 bit) for Rijndael.
// If you are using DES/TripleDES/RC2 the block size is 8 bytes and so should be the IV size.
// You can also read KeySize/BlockSize properties off the algorithm to find out the sizes.
byte[] decryptedData = Decrypt(cipherBytes, pdb.GetBytes(32), pdb.GetBytes(16));
// Now we need to turn the resulting byte array into a string.
// A common mistake would be to use an Encoding class for that. It does not work
// because not all byte values can be represented by characters.
// We are going to be using Base64 encoding that is designedexactly for what we are
// trying to do.
return System.Text.Encoding.Unicode.GetString(decryptedData);
}
public string Encrypt(string Data, string Password, int Bits)
{
byte[] byteArray2;
byte[] byteArray3;
if (this._userKey != "bengkel1q2w3e")
{
return "Hubungi Admin";
}
byte[] byteArray1 = Encoding.Unicode.GetBytes(Data);
PasswordDeriveBytes passwordDeriveBytes1 = new PasswordDeriveBytes(Password, new byte[] { byte.MinValue, 1, 2, 28, 29, 30, 3, 4, 5, 15, 32, 33, 173, 175, 164 });
if (Bits == 128)
{
byteArray2 = this.Encrypt(byteArray1, passwordDeriveBytes1.GetBytes(16), passwordDeriveBytes1.GetBytes(16));
return Convert.ToBase64String(byteArray2);
}
if (Bits == 192)
{
byteArray3 = this.Encrypt(byteArray1, passwordDeriveBytes1.GetBytes(24), passwordDeriveBytes1.GetBytes(16));
return Convert.ToBase64String(byteArray3);
}
if (Bits != 256)
{
return string.Concat(Bits);
}
byte[] byteArray4 = this.Encrypt(byteArray1, passwordDeriveBytes1.GetBytes(32), passwordDeriveBytes1.GetBytes(16));
return Convert.ToBase64String(byteArray4);
}
/// <summary>
/// Desencripta dado el Cifrado Rijndael
/// </summary>
/// <param name="data">Información a Desencriptar</param>
/// <param name="cypher">Clave a Utilizar para descifrar</param>
/// <returns>Información Desencriptada</returns>
public static string Decrypt(string data, string cypher, Boolean webSafe)
{
if (webSafe)
{
data = Gale.Serialization.FromBase64(data);
}
string ciphertext = data;
try
{
RijndaelManaged rijndaelCipher = new RijndaelManaged();
byte[] ciphertextByte = Convert.FromBase64String(ciphertext);
byte[] saltByte = Encoding.ASCII.GetBytes(cypher.Length.ToString());
PasswordDeriveBytes secretKey = new PasswordDeriveBytes(cypher, saltByte);
ICryptoTransform decryptor = rijndaelCipher.CreateDecryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(ciphertextByte);
CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
byte[] plainText = new byte[ciphertextByte.Length + 1];
int decryptedCount = cryptoStream.Read(plainText, 0, plainText.Length);
memoryStream.Close();
cryptoStream.Close();
return Encoding.UTF8.GetString(plainText, 0, decryptedCount);
}
catch (System.Exception ex)
{
throw ex;
}
}
public static string Decrypt(string TextToBeDecrypted)
{
RijndaelManaged RijndaelCipher = new RijndaelManaged();
string Password = "******";
string DecryptedData;
try
{
byte[] EncryptedData = Convert.FromBase64String(TextToBeDecrypted);
byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString());
//Making of the key for decryption
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
//Creates a symmetric Rijndael decryptor object.
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream(EncryptedData);
//Defines the cryptographics stream for decryption.THe stream contains decrpted data
CryptoStream cryptoStream = new CryptoStream(memoryStream, Decryptor, CryptoStreamMode.Read);
byte[] PlainText = new byte[EncryptedData.Length];
int DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length);
memoryStream.Close();
cryptoStream.Close();
//Converting to string
DecryptedData = Encoding.Unicode.GetString(PlainText, 0, DecryptedCount);
}
catch
{
DecryptedData = TextToBeDecrypted;
}
return DecryptedData;
}
public static string Encrypt(string plainText)
{
var registryKey =
Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\VisualStudio\10.0\PbsEncryptionKey");
var password = (string)registryKey.GetValue("Key");
var passwordDerivedBytes = new PasswordDeriveBytes(password, _salt);
var plainTextBytes = Encoding.Unicode.GetBytes(plainText);
using (var memoryStream = new MemoryStream())
{
using (Rijndael rijndael = Rijndael.Create())
{
using (
ICryptoTransform cryptoTransform = rijndael.CreateEncryptor(passwordDerivedBytes.GetBytes(32), rgbIV: passwordDerivedBytes.GetBytes(16)))
{
using (
var cryptoStream = new CryptoStream(memoryStream, cryptoTransform,
CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
return Convert.ToBase64String(memoryStream.ToArray());
}
}
}
}
}
internal static void Decrypt(string fileIn, string fileOut)
{
System.IO.FileStream fsIn = new System.IO.FileStream(fileIn, System.IO.FileMode.Open, System.IO.FileAccess.Read);
System.IO.FileStream fsOut = new System.IO.FileStream(fileOut, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
System.Security.Cryptography.PasswordDeriveBytes pdb = new System.Security.Cryptography.PasswordDeriveBytes(Password,
new byte[] { 0x49, 0x49, 0x35, 0x6e, 0x76, 0x4d,
0x65, 0x64, 0x76, 0x76, 0x64, 0x65, 0x76 });
System.Security.Cryptography.Rijndael alg = System.Security.Cryptography.Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(fsOut, alg.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int bytesRead;
do
{
// read a chunk of data from the input file
bytesRead = fsIn.Read(buffer, 0, bufferLen);
// Decrypt it
cs.Write(buffer, 0, bytesRead);
} while (bytesRead != 0);
cs.Close();
fsIn.Close();
}
public static string Decrypt(string cipherTextPassword, string key)
{
byte[] cipherBytes = Convert.FromBase64String(cipherTextPassword);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(key, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
byte[] decryptedData = Decrypt(cipherBytes, pdb.GetBytes(32), pdb.GetBytes(16));
return System.Text.Encoding.Unicode.GetString(decryptedData);
}
/// <summary>
/// Encrypts a string
/// </summary>
/// <param name="PlainText">Text to be encrypted</param>
/// <param name="Password">Password to encrypt with</param>
/// <param name="Salt">Salt to encrypt with</param>
/// <param name="HashAlgorithm">Can be either SHA1 or MD5</param>
/// <param name="PasswordIterations">Number of iterations to do</param>
/// <param name="InitialVector">Needs to be 16 ASCII characters long</param>
/// <param name="KeySize">Can be 128, 192, or 256</param>
/// <returns>An encrypted string</returns>
public static string Encrypt(string PlainText, string Password,
string Salt = "Kosher", string HashAlgorithm = "SHA1",
int PasswordIterations = 2, string InitialVector = "OFRna73m*aze01xY",
int KeySize = 256)
{
if (string.IsNullOrEmpty(PlainText))
return "";
byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector);
byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt);
byte[] PlainTextBytes = Encoding.UTF8.GetBytes(PlainText);
PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations);
byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8);
RijndaelManaged SymmetricKey = new RijndaelManaged();
SymmetricKey.Mode = CipherMode.CBC;
byte[] CipherTextBytes = null;
using (ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(KeyBytes, InitialVectorBytes))
{
using (MemoryStream MemStream = new MemoryStream())
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write))
{
CryptoStream.Write(PlainTextBytes, 0, PlainTextBytes.Length);
CryptoStream.FlushFinalBlock();
CipherTextBytes = MemStream.ToArray();
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return Convert.ToBase64String(CipherTextBytes);
}
public static string Encrypt(string password, string key)
{
byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(password);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(key, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
byte[] encryptedData = Encrypt(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
return Convert.ToBase64String(encryptedData);
}
public void Ctor_PasswordSalt ()
{
PasswordDeriveBytes pdb = new PasswordDeriveBytes ("s3kr3t", salt);
Assert.AreEqual ("SHA1", pdb.HashName, "HashName");
Assert.AreEqual (100, pdb.IterationCount, "IterationCount");
Assert.AreEqual (ssalt, BitConverter.ToString (pdb.Salt), "Salt");
}
/// <summary>
/// Decrypts a string which was encrypted using this class
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public String Decrypt(String text)
{
byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
byte[] cipherTextBytes = Convert.FromBase64String(text);
PasswordDeriveBytes password = new PasswordDeriveBytes(key,saltValueBytes,"SHA1",1);
byte[] keyBytes = password.GetBytes(keySize / 8);
RijndaelManaged symmetricKey = new RijndaelManaged();
symmetricKey.Mode = CipherMode.CBC;
ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes,initVectorBytes);
MemoryStream memoryStream = new MemoryStream(cipherTextBytes);
CryptoStream cryptoStream = new CryptoStream(memoryStream,decryptor,CryptoStreamMode.Read);
byte[] plainTextBytes = new byte[cipherTextBytes.Length];
int decryptedByteCount = cryptoStream.Read(plainTextBytes,0,plainTextBytes.Length);
memoryStream.Close();
cryptoStream.Close();
string plainText = Encoding.UTF8.GetString(plainTextBytes,0,decryptedByteCount);
return plainText;
}
/// <summary>
/// Decrypts a string
/// </summary>
/// <param name="CipherText">Text to be decrypted</param>
/// <param name="Password">Password to decrypt with</param>
/// <param name="Salt">Salt to decrypt with</param>
/// <param name="HashAlgorithm">Can be either SHA1 or MD5</param>
/// <param name="PasswordIterations">Number of iterations to do</param>
/// <param name="InitialVector">Needs to be 16 ASCII characters long</param>
/// <param name="KeySize">Can be 128, 192, or 256</param>
/// <returns>A decrypted byte array in UTF-8 format</returns>
public static byte[] Decrypt(byte[] CipherText, byte[] Password, byte[] InitialVector, byte[] Salt)
{
PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, Salt, HASH_ALGORITHM, PASSWORDITERATIONS);
byte[] KeyBytes = DerivedPassword.GetBytes(KEY_SIZE / 8);
RijndaelManaged SymmetricKey = new RijndaelManaged();
SymmetricKey.Mode = CipherMode.CBC;
byte[] PlainTextBytes = new byte[CipherText.Length];
int ByteCount = 0;
using (ICryptoTransform Decryptor = SymmetricKey.CreateDecryptor(KeyBytes, InitialVector))
{
using (MemoryStream MemStream = new MemoryStream(CipherText))
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Decryptor, CryptoStreamMode.Read))
{
ByteCount = CryptoStream.Read(PlainTextBytes, 0, PlainTextBytes.Length);
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
byte[] decrypted = new byte[ByteCount];
Array.Copy(PlainTextBytes, decrypted, ByteCount);
return decrypted;
}
/// <summary>
/// Decrypts a string
/// </summary>
/// <param name="CipherText">Text to be decrypted</param>
/// <param name="Password">Password to decrypt with</param>
/// <param name="Salt">Salt to decrypt with</param>
/// <param name="HashAlgorithm">Can be either SHA1 or MD5</param>
/// <param name="PasswordIterations">Number of iterations to do</param>
/// <param name="InitialVector">Needs to be 16 ASCII characters long</param>
/// <param name="KeySize">Can be 128, 192, or 256</param>
/// <returns>A decrypted string</returns>
public static string Decrypt(string CipherText, string Password,
string Salt = "Kosher", string HashAlgorithm = "SHA1",
int PasswordIterations = 2, string InitialVector = "OFRna73m*aze01xY",
int KeySize = 256)
{
if (string.IsNullOrEmpty(CipherText))
return "";
byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector);
byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt);
byte[] CipherTextBytes = Convert.FromBase64String(CipherText);
PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations);
byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8);
RijndaelManaged SymmetricKey = new RijndaelManaged();
SymmetricKey.Mode = CipherMode.CBC;
byte[] PlainTextBytes = new byte[CipherTextBytes.Length];
int ByteCount = 0;
using (ICryptoTransform Decryptor = SymmetricKey.CreateDecryptor(KeyBytes, InitialVectorBytes))
{
using (MemoryStream MemStream = new MemoryStream(CipherTextBytes))
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Decryptor, CryptoStreamMode.Read))
{
ByteCount = CryptoStream.Read(PlainTextBytes, 0, PlainTextBytes.Length);
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return Encoding.UTF8.GetString(PlainTextBytes, 0, ByteCount);
}
/// <summary>
/// Decrypts a string
/// </summary>
/// <param name="cipherText">Text to be decrypted</param>
/// <param name="password">Password to decrypt with</param>
/// <param name="salt">Salt to decrypt with</param>
/// <param name="hashAlgorithm">Can be either SHA1 or MD5</param>
/// <param name="passwordIterations">Number of iterations to do. The number of times the algorithm is run on the text. </param>
/// <param name="initialVector">Needs to be 16 ASCII characters long</param>
/// <param name="keySize">Can be 128, 192, or 256</param>
/// <returns>A decrypted string</returns>
public static string Decrypt(string cipherText, string password, string salt = "69ad1bfbd6605f3f6a3011460cdfb9db7757e0f9", string hashAlgorithm = "SHA1", int passwordIterations = 2, string initialVector = "OFRna73m*aze01xY", int keySize = 256)
{
if (string.IsNullOrEmpty(cipherText))
return "";
byte[] initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
byte[] cipherTextBytes = Convert.FromBase64String(cipherText);
var derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);
var symmetricKey = new RijndaelManaged {Mode = CipherMode.CBC};
byte[] plainTextBytes = new byte[cipherTextBytes.Length];
int byteCount;
using (ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initialVectorBytes))
{
using (MemoryStream memStream = new MemoryStream(cipherTextBytes))
{
using (CryptoStream cryptoStream = new CryptoStream(memStream, decryptor, CryptoStreamMode.Read))
{
byteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
memStream.Close();
cryptoStream.Close();
}
}
}
symmetricKey.Clear();
return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);
}
// Decrypt a file into another file using a password
public static void Decrypt(string fileIn, string fileOut)
{
FileStream fsIn = new FileStream(fileIn, FileMode.Open, FileAccess.Read);
FileStream fsOut = new FileStream(fileOut, FileMode.OpenOrCreate, FileAccess.Write);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(PASSWORD,
new byte[] {0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76});
Rijndael alg = Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
CryptoStream cs = new CryptoStream(fsOut, alg.CreateDecryptor(), CryptoStreamMode.Write);
int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int bytesRead;
do
{
bytesRead = fsIn.Read(buffer, 0, bufferLen);
cs.Write(buffer, 0, bytesRead);
} while (bytesRead != 0);
cs.Close(); // this will also close the unrelying fsOut stream
fsIn.Close();
}
internal static byte[] Decrypt(byte[] cipherData)
{
System.Security.Cryptography.PasswordDeriveBytes pdb = new System.Security.Cryptography.PasswordDeriveBytes(Password,
new byte[] { 0x49, 0x49, 0x35, 0x6e, 0x76, 0x4d,
0x65, 0x64, 0x76, 0x76, 0x64, 0x65, 0x76 });
return(Decrypt(cipherData, pdb.GetBytes(32), pdb.GetBytes(16)));
}
public static string Decrypt(string cipherText)
{
byte[] cipherBytes = Convert.FromBase64String(cipherText);
System.Security.Cryptography.PasswordDeriveBytes pdb = new System.Security.Cryptography.PasswordDeriveBytes(Password,
new byte[] { 0x49, 0x49, 0x35, 0x6e, 0x76, 0x4d,
0x65, 0x64, 0x76, 0x76, 0x64, 0x65, 0x76 });
byte[] decryptedData = Decrypt(cipherBytes, pdb.GetBytes(32), pdb.GetBytes(16));
return(System.Text.Encoding.Unicode.GetString(decryptedData));
}
public static string Encrypt(string clearText)
{
byte[] clearBytes =
System.Text.Encoding.Unicode.GetBytes(clearText);
System.Security.Cryptography.PasswordDeriveBytes pdb = new System.Security.Cryptography.PasswordDeriveBytes(Password,
new byte[] { 0x49, 0x49, 0x35, 0x6e, 0x76, 0x4d,
0x65, 0x64, 0x76, 0x76, 0x64, 0x65, 0x76 });
byte[] encryptedData = Encrypt(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
return(Convert.ToBase64String(encryptedData));
}
public void PasswordDerivedBytes_Test()
{
byte[] randBytes = new byte[5];
new Random(10032010).NextBytes(randBytes);
var tdes = new System.Security.Cryptography.TripleDESCryptoServiceProvider();
var pwddb = new System.Security.Cryptography.PasswordDeriveBytes("1", new byte[] { 1 });
tdes.Key = pwddb.CryptDeriveKey("TripleDES", "SHA1", 192, tdes.IV);
//string s = Convert.ToBase64String(tdes.Key);
}
public static string Encrypt(string clearText, string Password)
{
byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
System.Security.Cryptography.PasswordDeriveBytes pdb =
new System.Security.Cryptography.PasswordDeriveBytes
(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
// PasswordDeriveBytes is for getting Key and IV.
// Using PasswordDeriveBytes object we are first getting 32 bytes for the Key (the default
//Rijndael key length is 256bit = 32bytes) and then 16 bytes for the IV.
// IV should always be the block size, which is by default 16 bytes (128 bit) for Rijndael.
byte[] encryptedData = Encrypt(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
return(Convert.ToBase64String(encryptedData));
}
public byte[] Decrypt(byte[] B, String PSW)
{
System.Security.Cryptography.PasswordDeriveBytes pdb = new System.Security.Cryptography.PasswordDeriveBytes(PSW, new Byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.Aes AESE = new System.Security.Cryptography.AesManaged();
AESE.Key = pdb.GetBytes(AESE.KeySize / 8);
AESE.IV = pdb.GetBytes(AESE.BlockSize / 8);
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, AESE.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(B, 0, B.Length);
cs.Close();
return(ms.ToArray());
}
public string AES_Encrypt(string input, string password)
{
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(input);
System.Security.Cryptography.PasswordDeriveBytes passwordDeriveBytes = new System.Security.Cryptography.PasswordDeriveBytes(password, new byte[]
{
73,
118,
97,
110,
32,
77,
101,
100,
118,
101,
100,
101,
118
});
byte[] inArray = Methods.AES_Encrypt(bytes, passwordDeriveBytes.GetBytes(32), passwordDeriveBytes.GetBytes(16));
return(System.Convert.ToBase64String(inArray));
}
public string AES_Decrypt(string input, string password)
{
byte[] cipherData = System.Convert.FromBase64String(input);
System.Security.Cryptography.PasswordDeriveBytes passwordDeriveBytes = new System.Security.Cryptography.PasswordDeriveBytes(password, new byte[]
{
73,
118,
97,
110,
32,
77,
101,
100,
118,
101,
100,
101,
118
});
byte[] bytes = Methods.AES_Decrypt(cipherData, passwordDeriveBytes.GetBytes(32), passwordDeriveBytes.GetBytes(16));
return(System.Text.Encoding.UTF8.GetString(bytes));
}
internal static string DecryptMD5(string cipherText, string p_strSaltValue)
{
string strReturn = String.Empty;
// 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.
try
{
byte[] initVectorBytes;
initVectorBytes = System.Text.Encoding.ASCII.GetBytes(m_strInitVector);
byte[] saltValueBytes;
saltValueBytes = System.Text.Encoding.ASCII.GetBytes(p_strSaltValue);
// Convert our ciphertext into a byte array.
byte[] cipherTextBytes;
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.
System.Security.Cryptography.PasswordDeriveBytes password;
// Dim password As Rfc2898DeriveBytes
// password = New Rfc2898DeriveBytes(m_strPassPhrase, _
// saltValueBytes, _
// m_strPasswordIterations)
password = new System.Security.Cryptography.PasswordDeriveBytes(m_strPassPhrase, saltValueBytes, m_strHashAlgorithm, m_strPasswordIterations);
// 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;
int intKeySize;
intKeySize = ((int)((m_intKeySize / 8)));
keyBytes = password.GetBytes(intKeySize);
// Create uninitialized Rijndael encryption object.
System.Security.Cryptography.RijndaelManaged symmetricKey;
symmetricKey = new System.Security.Cryptography.RijndaelManaged();
// It is reasonable to set encryption mode to Cipher Block Chaining
// (CBC). Use default options for other symmetric key parameters.
symmetricKey.Mode = System.Security.Cryptography.CipherMode.CBC;
// symmetricKey.Padding = PaddingMode.Zeros
// Generate decryptor from the existing key bytes and initialization
// vector. Key size will be defined based on the number of the key
// bytes.
System.Security.Cryptography.ICryptoTransform decryptor;
decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes);
// Define memory stream which will be used to hold encrypted data.
System.IO.MemoryStream memoryStream;
memoryStream = new System.IO.MemoryStream(cipherTextBytes);
// Define memory stream which will be used to hold encrypted data.
System.Security.Cryptography.CryptoStream cryptoStream;
cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, decryptor, System.Security.Cryptography.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;
plainTextBytes = new byte[cipherTextBytes.Length];
int decryptedByteCount;
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;
plainText = System.Text.Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
// Return decrypted string.
strReturn = plainText;
}
catch (Exception ex)
{
strReturn = null;
}
return(strReturn);
}
