private String Encrypt(string _inputText, string _encryptionKey, string _initVector)
{
string _out = "";
_pwd = Encoding.UTF8.GetBytes(_encryptionKey);
_ivBytes = Encoding.UTF8.GetBytes(_initVector);
int len = _pwd.Length;
if (len > _key.Length)
{
len = _key.Length;
}
int ivLenth = _ivBytes.Length;
if (ivLenth > _iv.Length)
{
ivLenth = _iv.Length;
}
Array.Copy(_pwd, _key, len);
Array.Copy(_ivBytes, _iv, ivLenth);
_rcipher.Key = _key;
_rcipher.IV = _iv;
byte[] plainText = _rcipher.CreateEncryptor().TransformFinalBlock(_enc.GetBytes(_inputText), 0, _inputText.Length);
_out = Convert.ToBase64String(plainText);
_rcipher.Clear();
_rcipher.Dispose();
return(_out);
}
} //end StringToByteArray
/// <summary>
/// Dispose RijndaelManaged object initialized in the constructor
/// </summary>
public void Dispose()
{
if (rijn != null)
{
rijn.Dispose();
}
} //end Dispose()
public static byte[] DecrypteCBC(byte[] toDecryptArray, byte[] keyArray, byte[] ivArray, bool isPadding = false)
{
if (toDecryptArray.Length % 16 > 0)
{
Trace.WriteLine("AESdecryptCBC: data length not /16, truncating");
toDecryptArray = new byte[toDecryptArray.Length / 16 * 16];
}
RijndaelManaged rijndael = new RijndaelManaged
{
Mode = CipherMode.CBC,
Padding = PaddingMode.Zeros,
Key = keyArray,
IV = ivArray ?? ZEROIV
};
byte[] result;
using (ICryptoTransform cTransform = rijndael.CreateDecryptor())
{
result = cTransform.TransformFinalBlock(toDecryptArray, 0, toDecryptArray.Length);
}
rijndael.Dispose();
if (isPadding)
{
return(RemovePadding(16, result));
}
return(result);
}
public int RSAStorePrivateKey(string filename, string PrivateKey, string password)
{
try
{
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = 256;
AES.GenerateIV();
byte[] Passkey = AESCreateKey(password);
string pKey = Convert.ToBase64String(IVCipher(AES.IV, AESEncrypt(Encoding.UTF8.GetBytes(PrivateKey), Passkey, AES.IV)), Base64FormattingOptions.InsertLineBreaks);
if (AES != null)
{
AES.Dispose();
}
using (StreamWriter sw = new StreamWriter(filename))
{
sw.WriteLine("-----BEGIN PRIVATE KEY-----");
sw.WriteLine(pKey);
sw.WriteLine("-----END PRIVATE KEY-----");
}
return(0);
}
catch { return(1); }
}
public void Dispose()
{
Engine.Dispose();
HashProvider.Dispose();
HashBytes = null;
_Password = null;
}
private string Encrypt(string textToEncrypt, string key)
{
RijndaelManaged rijndaelCipher = new RijndaelManaged
{
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7,
KeySize = 128,
BlockSize = 128
};
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[16];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = pwdBytes;
rijndaelCipher.IV = keyBytes;
ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
byte[] plainText = Encoding.UTF8.GetBytes(textToEncrypt);
rijndaelCipher.Dispose();
return(Convert.ToBase64String(transform.TransformFinalBlock(plainText, 0, plainText.Length)));
}
/// <summary>
/// aes256 解密
/// </summary>
/// <param name="encryptStr"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns></returns>
public static string Decrypt(string encryptStr, byte[] key, byte[] iv)
{
byte[] toEncryptArray = Convert.FromBase64String(encryptStr);
using (var rijAlg = new RijndaelManaged())
{
//Settings
rijAlg.Mode = CipherMode.CBC;
//rijAlg.Padding = PaddingMode.PKCS7;
rijAlg.KeySize = 256;
// Create a decrytor to perform the stream transform.
var decryptor = rijAlg.CreateDecryptor(key, iv);
// Create the streams used for decryption.
using (var msDecrypt = new MemoryStream(toEncryptArray))
{
using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
encryptStr = srDecrypt.ReadToEnd();
srDecrypt.Dispose();
}
csDecrypt.Dispose();
}
msDecrypt.Dispose();
}
rijAlg.Dispose();
}
return(encryptStr);
}
private static string encryptDecrypt(string _inputText, string _encryptionKey, EncryptMode _mode, string _initVector)
{
string _out = ""; // output string
//_encryptionKey = MD5Hash (_encryptionKey);
using (RijndaelManaged _rcipher = GetProvider(_encryptionKey, _initVector))
{
UTF8Encoding _enc = new UTF8Encoding();
try
{
if (_mode.Equals(EncryptMode.ENCRYPT))
{
//encrypt
byte[] plainText = _rcipher.CreateEncryptor().TransformFinalBlock(_enc.GetBytes(_inputText), 0, _inputText.Length);
_out = Convert.ToBase64String(plainText);
}
if (_mode.Equals(EncryptMode.DECRYPT))
{
//decrypt
byte[] plainText = _rcipher.CreateDecryptor().TransformFinalBlock(Convert.FromBase64String(_inputText), 0, Convert.FromBase64String(_inputText).Length);
_out = _enc.GetString(plainText);
}
}
catch (Exception ex) { throw; }
finally { _rcipher.Dispose(); }
}
return(_out); // return encrypted/decrypted string
}
/// <summary>
///
/// </summary>
/// <param name="text"></param>
/// <param name="saltValue"></param>
/// <param name="passPhrase"></param>
/// <param name="hashAlgorithm"></param>
/// <param name="passwordIterations"></param>
/// <param name="initVector"></param>
/// <returns></returns>
private static string Decryption(string text, string saltValue, string passPhrase, string hashAlgorithm, int passwordIterations, string initVector)
{
try
{
saltValue = saltValue.ToLower();
var bytes = Encoding.ASCII.GetBytes(initVector);
var rgbSalt = Encoding.ASCII.GetBytes(saltValue);
var buffer = Convert.FromBase64String(text);
var rgbKey = new PasswordDeriveBytes(passPhrase, rgbSalt, hashAlgorithm, passwordIterations).GetBytes(KeySize / 8);
var managed = new RijndaelManaged {
Mode = CipherMode.CBC
};
var transform = managed.CreateDecryptor(rgbKey, bytes);
var stream = new MemoryStream(buffer);
var stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Read);
var buffer5 = new byte[buffer.Length];
var count = stream2.Read(buffer5, 0, buffer5.Length);
stream.Close();
stream.Dispose();
stream2.Close();
stream2.Dispose();
transform.Dispose();
managed.Dispose();
return(Encoding.UTF8.GetString(buffer5, 0, count));
}
catch (Exception) { return(text); }
}
private string Decrypt(string textToDecrypt, string key)
{
RijndaelManaged rijndaelCipher = new RijndaelManaged
{
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7,
KeySize = 128,
BlockSize = 128
};
byte[] encryptedData = Convert.FromBase64String(textToDecrypt);
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[16];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = pwdBytes;
rijndaelCipher.IV = keyBytes;
byte[] plainText = rijndaelCipher.CreateDecryptor().TransformFinalBlock(encryptedData, 0, encryptedData.Length);
rijndaelCipher.Dispose();
return(Encoding.UTF8.GetString(plainText));
}
/// <summary>
///
/// </summary>
/// <param name="text"></param>
/// <param name="saltValue"></param>
/// <param name="passPhrase"></param>
/// <param name="hashAlgorithm"></param>
/// <param name="passwordIterations"></param>
/// <param name="initVector"></param>
/// <returns></returns>
private static string Encrypt(string text, string saltValue, string passPhrase, string hashAlgorithm, int passwordIterations, string initVector)
{
try
{
saltValue = saltValue.ToLower();
var bytes = Encoding.ASCII.GetBytes(initVector);
var rgbSalt = Encoding.ASCII.GetBytes(saltValue);
var buffer = Encoding.UTF8.GetBytes(text);
var rgbKey = new PasswordDeriveBytes(passPhrase, rgbSalt, hashAlgorithm, passwordIterations).GetBytes(KeySize / 8);
var managed = new RijndaelManaged {
Mode = CipherMode.CBC
};
var transform = managed.CreateEncryptor(rgbKey, bytes);
var stream = new MemoryStream();
var stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Write);
stream2.Write(buffer, 0, buffer.Length);
stream2.FlushFinalBlock();
var inArray = stream.ToArray();
stream.Close();
stream.Dispose();
stream2.Close();
stream2.Dispose();
transform.Dispose();
managed.Dispose();
return(Convert.ToBase64String(inArray));
}
catch { return(text); }
}
public static string Decrypt(string encyrptedText, string key)
{
byte[] cipherTextBytesWithSaltAndIv = Convert.FromBase64String(encyrptedText);
byte[] saltStringBytes = cipherTextBytesWithSaltAndIv.Take(KEY_SIZE / 8).ToArray();
byte[] ivStringBytes = cipherTextBytesWithSaltAndIv.Skip(KEY_SIZE / 8)
.Take(KEY_SIZE / 8).ToArray();
byte[] cipherTextBytes = cipherTextBytesWithSaltAndIv.Skip(KEY_SIZE / 8 * 2)
.Take(cipherTextBytesWithSaltAndIv.Length - KEY_SIZE / 8 * 2).ToArray();
Rfc2898DeriveBytes password = new Rfc2898DeriveBytes(key, saltStringBytes, ITERATIONS_COUNT);
byte[] keyBytes = password.GetBytes(KEY_SIZE / 8);
RijndaelManaged symmetricKey = new RijndaelManaged
{
BlockSize = 256,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
};
ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, ivStringBytes);
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();
password.Dispose(); symmetricKey.Dispose(); decryptor.Dispose();
memoryStream.Dispose(); cryptoStream.Dispose();
return(Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount));
}
public static string Encrypt(string plainText, string key)
{
byte[] saltStringBytes = Generate256BitsOfRandomEntropy();
byte[] ivStringBytes = Generate256BitsOfRandomEntropy();
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
Rfc2898DeriveBytes password = new Rfc2898DeriveBytes(key, saltStringBytes, ITERATIONS_COUNT);
byte[] keyBytes = password.GetBytes(KEY_SIZE / 8);
RijndaelManaged symmetricKey = new RijndaelManaged
{
BlockSize = 256,
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7
};
ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, ivStringBytes);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write);
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
byte[] cipherTextBytes = saltStringBytes;
cipherTextBytes = cipherTextBytes.Concat(ivStringBytes).ToArray();
cipherTextBytes = cipherTextBytes.Concat(memoryStream.ToArray()).ToArray();
memoryStream.Close(); cryptoStream.Close();
cryptoStream.Dispose(); memoryStream.Dispose(); encryptor.Dispose();
symmetricKey.Dispose(); password.Dispose();
return(Convert.ToBase64String(cipherTextBytes));
}
/// <summary>
/// AES对称解密
/// </summary>
/// <param name="encryptBytes">要解密的二进制数据,如果是一个对象,该对象必须实现了<see cref="SerializableAttribute"/></param>
/// <param name="privateKey">加密的私钥</param>
/// <returns></returns>
public static object DeEncryptAES(byte[] encryptBytes, string privateKey)
{
object result = null;
if (StringUtil.IsNullOrEmpty(encryptBytes))
{
return(result);
}
RijndaelManaged managed = (RijndaelManaged)GetEncryptFactory <RijndaelManaged>(privateKey, 16);
try
{
byte[] deencryptResult = Encrypt(managed.CreateDecryptor(), encryptBytes);
result = SerializeUtil.FromBinary <object>(deencryptResult);
}
catch (CryptographicException ex)
{
throw ex;
}
catch (SerializationException ex)
{
throw new SerializationException("解密时序列化失败,无法反序列化对象", ex);
}
finally
{
managed.Dispose();
}
return(result);
}
public static byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes)
{
byte[] result = null;
byte[] salt = new byte[8] {
1, 2, 3, 4, 5, 6, 7, 8
};
MemoryStream val = new MemoryStream();
try {
RijndaelManaged val2 = new RijndaelManaged();
try {
val2.KeySize = 256;
val2.BlockSize = 128;
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(passwordBytes, salt, 1000);
val2.Key = rfc2898DeriveBytes.GetBytes(val2.KeySize / 8);
val2.IV = rfc2898DeriveBytes.GetBytes(val2.BlockSize / 8);
val2.Mode = CipherMode.CBC;
using (CryptoStream cryptoStream = new CryptoStream(val, val2.CreateDecryptor(), CryptoStreamMode.Write)) {
cryptoStream.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
cryptoStream.Close();
}
result = val.ToArray();
} finally {
val2?.Dispose();
}
} finally {
val?.Dispose();
}
return(result);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
_rijndaelManaged.Dispose();
_rsa.Dispose();
}
}
private String encryptDecrypt(string _inputText, string _encryptionKey, EncryptMode _mode, string _initVector)
{
string _out = "";
//get hashed pin code to bytes array
_pwd = Encoding.UTF8.GetBytes(_encryptionKey);
//get IV to byte array
_ivBytes = Encoding.UTF8.GetBytes(_initVector);
//check that the IV and hashed key are the correct size in bytes
int len = _pwd.Length;
if (len > _key.Length)
{
len = _key.Length;
}
int ivLenth = _ivBytes.Length;
if (ivLenth > _iv.Length)
{
ivLenth = _iv.Length;
}
//copy hashed pincode and IV bytes to AES key and IV
Array.Copy(_pwd, _key, len);
Array.Copy(_ivBytes, _iv, ivLenth);
_rcipher.Key = _key;
_rcipher.IV = _iv;
//encrypt mode
if (_mode.Equals(EncryptMode.ENCRYPT))
{
//encrypt the password
byte[] plainText = _rcipher.CreateEncryptor().TransformFinalBlock(_enc.GetBytes(_inputText),
0, _inputText.Length);
//combine the ciphertext and the IV so we can use it later
byte[] combined = new byte[_iv.Length + plainText.Length];
System.Buffer.BlockCopy(_iv, 0, combined, 0, _iv.Length);
System.Buffer.BlockCopy(plainText, 0, combined, _iv.Length, plainText.Length);
//convert ciphertext bytes to hex
_out = Convert.ToBase64String(combined);
}
//decrypt mode
if (_mode.Equals(EncryptMode.DECRYPT))
{
//decrypt the ciphertext back to plaintext using the same IV
byte[] plainText = _rcipher.CreateDecryptor().TransformFinalBlock(Convert.FromBase64String(_inputText),
0, Convert.FromBase64String(_inputText).Length);
//convert plaintext bytes back to hex
String outputToString = _enc.GetString(plainText);
//remove IV from plaintext
String trimmed = outputToString.Remove(0, _iv.Length - 1);
_out = trimmed;
}
_rcipher.Dispose();
return(_out);
}
/// <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
var key = new Rfc2898DeriveBytes(sharedSecret, Salt);
// Create the streams used for decryption.
byte[] bytes = Convert.FromBase64String(cipherText);
using (var 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 (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var 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();
aesAlg.Dispose();
}
}
return(plaintext);
}
public static string EncryptStringAES(string plainText)
{
if (string.IsNullOrEmpty(plainText))
{
throw new ArgumentNullException("plainText");
}
string encryptedString = null; // Encrypted string to return.
RijndaelManaged aesAlgorithm = null; // RijndaelManaged object used to encrypt the data.
try
{
// Generate the key from a shared secret and initilization vector.
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes("https://github.com/R-Smith/vmPing" + Environment.MachineName, Encoding.ASCII.GetBytes(Environment.UserName + "@@vmping-salt@@"));
// Create a RijndaelManaged object.
aesAlgorithm = new RijndaelManaged();
aesAlgorithm.Padding = PaddingMode.PKCS7;
aesAlgorithm.Key = key.GetBytes(aesAlgorithm.KeySize / 8);
if (key != null)
{
key.Dispose();
}
// Create a decryptor to perform the stream transform.
ICryptoTransform encryptor = aesAlgorithm.CreateEncryptor(aesAlgorithm.Key, aesAlgorithm.IV);
// Create the streams used for encryption.
using (MemoryStream memoryStream = new MemoryStream())
{
// Prepend the IV.
memoryStream.Write(BitConverter.GetBytes(aesAlgorithm.IV.Length), 0, sizeof(int));
memoryStream.Write(aesAlgorithm.IV, 0, aesAlgorithm.IV.Length);
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter streamWriter = new StreamWriter(cryptoStream))
{
// Write all data to the stream.
streamWriter.Write(plainText);
}
}
encryptedString = Convert.ToBase64String(memoryStream.ToArray());
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlgorithm != null)
{
aesAlgorithm.Clear();
}
aesAlgorithm.Dispose();
}
// Return the encrypted bytes from the memory stream.
return(encryptedString);
}
public void Dispose()
{
if (m_aesAlg != null)
{
m_aesAlg.Clear();
m_aesAlg.Dispose();
m_aesAlg = null;
}
}
/// <inheritdoc />
public void Dispose()
{
CryptoStream.Flush();
CryptoStream.Dispose();
_transform.Dispose();
_symmetricKey.Dispose();
_key.Dispose();
}
public byte[] CreateIV()
{
var r = new RijndaelManaged();
r.GenerateIV();
var result = r.IV;
r.Dispose();
return(result);
}
public PasswordSheet DecryptFile()
{
PasswordSheet decryptedData = null;
FileStream stream = null;
PasswordDeriveBytes secretKey = null;
RijndaelManaged rijndaelCipher = null;
ICryptoTransform decryptor = null;
CryptoStream cryptoStream = null;
try
{
rijndaelCipher = new RijndaelManaged();
// Making of the key for decryption
secretKey = GetPasswordBytes();
// Creates a symmetric Rijndael decryptor object.
decryptor = rijndaelCipher.CreateDecryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
stream = new FileStream(_fileName, FileMode.Open, FileAccess.Read);
// Defines the cryptographics stream for decryption.THe stream contains decrpted data
cryptoStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read);
XmlSerializer serializer = new XmlSerializer(typeof(PasswordSheet));
decryptedData = (PasswordSheet)serializer.Deserialize(cryptoStream);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
if (secretKey != null)
{
secretKey.Dispose();
}
if (rijndaelCipher != null)
{
rijndaelCipher.Dispose();
}
if (cryptoStream != null)
{
cryptoStream.Dispose();
}
}
return(decryptedData);
}
public void EncryptFile(PasswordSheet sheet)
{
FileStream stream = null;
PasswordDeriveBytes secretKey = null;
RijndaelManaged rijndaelCipher = null;
ICryptoTransform encryptor = null;
CryptoStream cryptoStream = null;
try
{
stream = new FileStream(_fileName, FileMode.OpenOrCreate, FileAccess.Write);
stream.SetLength(0);
secretKey = GetPasswordBytes();
rijndaelCipher = new RijndaelManaged();
encryptor = rijndaelCipher.CreateEncryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
// Defines a stream that links data streams to cryptographic transformations
cryptoStream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write);
byte[] data = null;
using (var sheetStream = new MemoryStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(PasswordSheet));
serializer.Serialize(sheetStream, sheet);
data = sheetStream.GetBuffer();
}
cryptoStream.Write(data, 0, data.Length);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
finally
{
if (secretKey != null)
{
secretKey.Dispose();
}
if (rijndaelCipher != null)
{
rijndaelCipher.Dispose();
}
if (cryptoStream != null)
{
cryptoStream.Dispose();
}
}
}
/// <summary>
/// Protected implementation of Dispose pattern.
/// </summary>
/// <param name="disposing"></param>
protected virtual void Dispose(bool disposing)
{
if (disposed)
{
return;
}
rijndael?.Dispose();
disposed = true;
}
void Dispose(bool disposing)
{ // would be protected virtual if not sealed
if (disposing && !_disposed)
{ // only run this logic when Dispose is called
// and anything else that touches managed objects
_rijndael.Dispose();
//_encryptor.Dispose();
_disposed = true;
GC.SuppressFinalize(this);
}
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
if (_aes != null)
{
_aes.Dispose();
_aes = null;
}
}
}
/// <summary>
/// バイト配列を復号化する
/// </summary>
/// <param name="tCryptoData">暗号化されたバイト配列</param>
/// <param name="tKey">暗号化キー</param>
/// <param name="tVector">暗号化ベクター</param>
/// <returns>復号化されたバイト配列</returns>
public static byte[] Decrypt(byte[] cryptoData, string key, string vector)
{
// 暗号化用の種別オブジェクト生成
// TripleDESCryptoServiceProvider tKind = new TripleDESCryptoServiceProvider() ;
RijndaelManaged kind = new RijndaelManaged()
{
Padding = PaddingMode.Zeros,
Mode = CipherMode.CBC,
KeySize = 256,
BlockSize = 256
};
//-----------------------------------------------------
// 暗号用のキー情報をセットする
byte[] aKey = Encoding.UTF8.GetBytes(key);
byte[] aVector = Encoding.UTF8.GetBytes(vector);
ICryptoTransform decryptor = kind.CreateDecryptor(aKey, aVector);
//-----------------------------------------------------
byte[] data = new byte[cryptoData.Length];
//-----------------------------------------------------
MemoryStream memoryStream = new MemoryStream(cryptoData);
// 復号化
CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
cryptoStream.Read(data, 0, data.Length);
cryptoStream.Close();
memoryStream.Close();
//-----------------------------------------------------
decryptor.Dispose();
kind.Clear();
kind.Dispose();
//-----------------------------------------------------
long size = (( long )data[0] << 0) | (( long )data[1] << 8) | (( long )data[2] << 16) | (( long )data[3]);
byte[] originalData = new byte[size];
System.Array.Copy(data, 4, originalData, 0, size);
return(originalData);
}
/// <summary>
/// static declerations for this scope only
/// </summary>
/// <param name="textToBeDecrypted">this is decrypted text</param>
/// <returns>it return th string</returns>
public static string Decrypt(string textToBeDecrypted)
{
RijndaelManaged rijndaelCipher = null;
const string Password = "******";
string decryptedData;
MemoryStream memoryStream = null;
PasswordDeriveBytes secretKey = null;
try
{
byte[] encryptedData = Convert.FromBase64String(textToBeDecrypted);
rijndaelCipher = new RijndaelManaged();
byte[] salt = Encoding.ASCII.GetBytes(Password.Length.ToString(CultureInfo.InvariantCulture));
////Making of the key for decryption
secretKey = new PasswordDeriveBytes(Password, salt);
////Creates a symmetric Rijndael decryptor object.
ICryptoTransform decryptor = rijndaelCipher.CreateDecryptor(secretKey.GetBytes(32), secretKey.GetBytes(16));
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);
////Converting to string
decryptedData = Encoding.UTF8.GetString(plainText, 0, decryptedCount);
return(decryptedData);
}
catch
{
decryptedData = textToBeDecrypted;
throw;
}
finally
{
// cryptoStream.Close();
if (rijndaelCipher != null)
{
rijndaelCipher.Dispose();
}
if (memoryStream != null)
{
memoryStream.Dispose();
}
if (secretKey != null)
{
secretKey.Dispose();
}
}
}
/// <summary>
/// AES对称加密
/// </summary>
/// <param name="content">要加密的内容,如果是一个对象必须要实现<see cref="SerializableAttribute"/></param>
/// <param name="privateKey">加密的密钥</param>
/// <returns></returns>
public static byte[] EncryptAES(object content, string privateKey)
{
byte[] result = new byte[0];
if (StringUtil.IsNullOrEmpty(content))
{
return(result);
}
RijndaelManaged managed = (RijndaelManaged)GetEncryptFactory <RijndaelManaged>(privateKey, 16);
result = Encrypt(managed.CreateEncryptor(), SerializeUtil.ToBinary(content));
managed.Dispose();
return(result);
}
