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);
}
}
/// <summary>
/// 문자열을 복호화
/// </summary>
/// <param name="InputText"></param>
/// <param name="Password"></param>
/// <returns></returns>
internal string GetDecryptedString(string InputText, string Password)
{
byte[] EncryptedData = Convert.FromBase64String(InputText);
#region 복호화 키 객체 만들기
RijndaelManaged RijndaelCipher = new RijndaelManaged();
byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
// Decryptor 객체를 만듭니다.
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
#endregion
#region 복호화
byte[] PlainText = null;
int DecryptedCount = 0;
using (MemoryStream memoryStream = new MemoryStream(EncryptedData))
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, Decryptor, CryptoStreamMode.Read))
{
/*
* 복호화된 데이터를 담을 바이트 배열을 선언합니다.
길이는 알 수 없지만, 일단 복호화되기 전의 데이터의 길이보다는
길지 않을 것이기 때문에 그 길이로 선언합니다
*/
PlainText = new byte[EncryptedData.Length];
// 복호화 시작
DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length);
}
}
// 복호화된 데이터를 문자열로 바꿉니다.
string DecryptedData = Encoding.Unicode.GetString(PlainText, 0, DecryptedCount);
//복호화 키 객체 해제
Decryptor.Dispose();
#endregion
return DecryptedData;
}
public static void EncryptData(String inName, String outName, String password)
{
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(password, keySalt);
Rijndael alg = Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
CryptoStream cs = new CryptoStream(fout, alg.CreateEncryptor(), CryptoStreamMode.Write);
int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int bytesRead;
do
{
bytesRead = fin.Read(buffer, 0, bufferLen);
cs.Write(buffer, 0, bytesRead);
}
while(bytesRead != 0);
cs.Close();
fin.Close();
}
public string Encrypt(string clearText)
{
passwordDeriveBytes = new PasswordDeriveBytes(key, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
var clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
var encryptedData = Encrypt(clearBytes, passwordDeriveBytes.GetBytes(32), passwordDeriveBytes.GetBytes(16));
return Convert.ToBase64String(encryptedData);
}
/// <summary>
/// Encrypt string
/// </summary>
/// <param name="queryString"></param>
/// <returns></returns>
public static string EncryptString(string inputString)
{
try
{
if (inputString != null)
{
// First we need to turn the input string into a byte array.
byte[] queryStringBytes = Encoding.UTF8.GetBytes(inputString);//Encoding.Unicode.GetBytes(queryString) ovo je izbacivalo pogrešku;
// 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(passwordStr, Encoding.UTF8.GetBytes(saltStr));
// 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.
byte[] encryptedData = Encrypt(queryStringBytes,
pdb.GetBytes(32), pdb.GetBytes(16));
return Convert.ToBase64String(encryptedData);
}
else
return null;
}
catch
{
return null;
}
finally
{ }
}
public byte[] DecryptBinary( byte [] encryptedBytes, string key )
{
RijndaelManaged RijndaelCipher = new RijndaelManaged ();
byte [] EncryptedData = encryptedBytes;
byte [] Salt = Encoding.ASCII.GetBytes ( key.Length.ToString () );
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes ( key, Salt );
// Create a decryptor from the existing SecretKey bytes.
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor ( SecretKey.GetBytes ( 32 ), 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 ();
// Return decrypted string.
return PlainText;
}
public static string omDecryptEx(string strEncryptedString)
{
if (!string.IsNullOrEmpty(strEncryptedString))
{
try
{
string strPassword = "******";
RijndaelManaged managed = new RijndaelManaged();
byte[] buffer = Convert.FromBase64String(strEncryptedString);
byte[] rgbSalt = Encoding.ASCII.GetBytes(strPassword.Length.ToString());
PasswordDeriveBytes bytes = new PasswordDeriveBytes(strPassword, rgbSalt);
ICryptoTransform transform = managed.CreateDecryptor(bytes.GetBytes(0x20), bytes.GetBytes(0x10));
MemoryStream stream = new MemoryStream(buffer);
CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Read);
byte[] buffer3 = new byte[buffer.Length];
int count = stream2.Read(buffer3, 0, buffer3.Length);
stream.Close();
stream2.Close();
return Encoding.Unicode.GetString(buffer3, 0, count);
}
catch
{
throw new SecurityException("Could not decrypt string");
}
}
return string.Empty;
}
private static string Decrypt(string inputText)
{
RijndaelManaged rijndaelCipher = new RijndaelManaged();
Byte[] encryptedData = Convert.FromBase64String(inputText);
//Rfc2898DeriveBytes pwdGen = new Rfc2898DeriveBytes(ENCRYPTION_KEY, ENCRYPTION_SALT, 1000);
PasswordDeriveBytes pwdGen = new PasswordDeriveBytes(ENCRYPTION(), ENCRYPTION_SALT());
byte[] Key = pwdGen.GetBytes(32);
byte[] IV = pwdGen.GetBytes(16);
using (ICryptoTransform decryptor = rijndaelCipher.CreateDecryptor(Key, IV))
{
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);
return Encoding.Unicode.GetString(plainText, 0, decryptedCount);
}
}
}
}
/// <summary>
/// Passwort-Verschlüsselung
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static string Encrypt(string text)
{
if (text.Length < 1)
{
return text;
}
string code = "";
System.Text.UnicodeEncoding enc = new System.Text.UnicodeEncoding();
byte[] bytes = enc.GetBytes(text);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(code, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
using (MemoryStream ms = new MemoryStream())
{
Rijndael alg = Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
using (CryptoStream cs = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(bytes, 0, bytes.Length);
}
bytes = ms.ToArray();
}
return Convert.ToBase64String(bytes);
}
/**
* AES 256 bits encrypt with salt
**/
private static byte[] Encrypt(byte[] plainTextBytes, byte[] passwordBytes, byte[] saltBytes)
{
byte[] cipherTextBytes = null;
ICryptoTransform encryptor = null;
PasswordDeriveBytes key = new PasswordDeriveBytes(passwordBytes, saltBytes, DEFAULT_HASH_ALGORITHM, PASSWORD_ITERATIONS);
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = DEFAULT_KEY_SIZE;
AES.Mode = CipherMode.CBC;
// Get Key And IV From Password And Salt
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
encryptor = AES.CreateEncryptor();
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write);
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
cipherTextBytes = memoryStream.ToArray();
memoryStream.Close();
cryptoStream.Close();
return cipherTextBytes;
}
public static string EncryptString(string InputText, string Password)
{
RijndaelManaged RijndaelCipher = new RijndaelManaged();
byte[] PlainText = System.Text.Encoding.Unicode.GetBytes(InputText);
byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, Encryptor, CryptoStreamMode.Write);
cryptoStream.Write(PlainText, 0, PlainText.Length);
cryptoStream.FlushFinalBlock();
byte[] CipherBytes = memoryStream.ToArray();
memoryStream.Close();
cryptoStream.Close();
string EncryptedData = Convert.ToBase64String(CipherBytes);
// Return encrypted string.
return EncryptedData;
}
/// <summary>
/// Triple DES Descrypt
/// </summary>
/// <param name="input">String to decrypt</param>
/// <param name="key">Encryption Key</param>
/// <returns></returns>
public static string Decrypt(string input, string key)
{
TripleDESCryptoServiceProvider crp =new TripleDESCryptoServiceProvider();
System.Text.UnicodeEncoding uEncode = new UnicodeEncoding();
System.Text.ASCIIEncoding aEncode =new ASCIIEncoding();
Byte[] bytCipherText = System.Convert.FromBase64String(input);
MemoryStream stmPlainText =new MemoryStream();
MemoryStream stmCipherText = new MemoryStream(bytCipherText);
Byte[] slt= {0x12};
PasswordDeriveBytes pdb = new PasswordDeriveBytes(key, slt);
Byte[] bytDerivedKey = pdb.GetBytes(24);
crp.Key = bytDerivedKey;
crp.IV = pdb.GetBytes(8);
CryptoStream csDecrypted = new CryptoStream(stmCipherText, crp.CreateDecryptor(), CryptoStreamMode.Read);
StreamWriter sw = new StreamWriter(stmPlainText);
StreamReader sr = new StreamReader(csDecrypted);
sw.Write(sr.ReadToEnd());
sw.Flush();
crp.Clear();
return uEncode.GetString(stmPlainText.ToArray());
}
// 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 designed exactly for what we are
// trying to do.
return System.Text.Encoding.Unicode.GetString(decryptedData);
}
public static String Cryption(string text, string password, bool boolCrypt)
{
byte[] utf8_Salt = new byte[] { 0x26, 0x19, 0x81, 0x4E, 0xA0, 0x6D, 0x95, 0x34, 0x26, 0x75, 0x64, 0x05, 0xF6 };
PasswordDeriveBytes i_Pass = new PasswordDeriveBytes(password, utf8_Salt);
Rijndael i_Alg = Rijndael.Create();
i_Alg.Key = i_Pass.GetBytes(32);
i_Alg.IV = i_Pass.GetBytes(16);
ICryptoTransform i_Trans = (boolCrypt) ? i_Alg.CreateEncryptor() : i_Alg.CreateDecryptor();
MemoryStream i_Mem = new MemoryStream();
CryptoStream i_Crypt = new CryptoStream(i_Mem, i_Trans, CryptoStreamMode.Write);
byte[] utf8_Data;
if (boolCrypt) utf8_Data = Encoding.Unicode.GetBytes(text);
else utf8_Data = Convert.FromBase64String(text);
try
{
i_Crypt.Write(utf8_Data, 0, utf8_Data.Length);
i_Crypt.Close();
}
catch { return null; }
if (boolCrypt) return Convert.ToBase64String(i_Mem.ToArray());
else return Encoding.Unicode.GetString(i_Mem.ToArray());
}
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());
}
}
}
}
}
public EncryptedAttribute( string password )
{
byte[] salt = new byte[] { 0x26, 0x19, 0x81, 0x4E, 0xA0, 0x6D, 0x95, 0x34, 0x26, 0x75, 0x64, 0x05, 0xF6 };
PasswordDeriveBytes pass = new PasswordDeriveBytes( password, salt );
this.Key = pass.GetBytes( 32 );
this.Vector = pass.GetBytes( 16 );
}
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());
}
}
}
}
}
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;
}
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;
}
}
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);
}
/// <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 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 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 DecryptString(String Text, String Key)
{
if (Text.IsNullOrEmpty())
throw new BPAExtensionException("DecryptString Text Not Found!");
RijndaelManaged RijndaelCipher = new RijndaelManaged();
byte[] EncryptedData = Convert.FromBase64String(Text.Replace("_", "/").Replace("-", "+"));
byte[] Salt = new UTF8Encoding().GetBytes(Key.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Key, Salt);
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(16), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream(EncryptedData);
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();
String DecryptedData = new UTF8Encoding().GetString(PlainText, 0, DecryptedCount);
if (HttpContext.Current != null)
return HttpContext.Current.Server.HtmlDecode(DecryptedData);
else
return DecryptedData;
}
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>
/// 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;
}
}
/// <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;
}
// 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();
}
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;
}
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();
}
// Decrypt bytes into bytes using a password
public static byte[] Decrypt(byte[] cipherData)
{
PasswordDeriveBytes pdb = new PasswordDeriveBytes(PASSWORD,
new byte[] {0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76});
return Decrypt(cipherData, pdb.GetBytes(32), pdb.GetBytes(16));
}
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 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);
}
