public byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
{
byte[] encryptedBytes = null;
// Set your salt here, change it to meet your flavor:
// The salt bytes must be at least 8 bytes.
byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
using (MemoryStream ms = new MemoryStream())
{
using (RijndaelManaged AES = new RijndaelManaged())
{
AES.KeySize = 256;
AES.BlockSize = 128;
var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
AES.Mode = CipherMode.CBC;
using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
cs.Close();
}
encryptedBytes = ms.ToArray();
}
}
return encryptedBytes;
}
public byte[] Encrypt(byte[] block)
{
ICryptoTransform enc = null;
Aes.Mode = CipherMode.CBC;
Aes.Key = key;
Aes.GenerateIV();
Console.WriteLine("Key: {0} IV: {1}", CNetwork.ByteArrayToString(Aes.Key), CNetwork.ByteArrayToString(Aes.IV));
CryptoStream cstream = null;
MemoryStream mem = null;
byte[] toEncrypt = null;
try
{
cstream = null;
mem = new MemoryStream();
toEncrypt = block;
enc = Aes.CreateEncryptor();
cstream = new CryptoStream(mem, enc, CryptoStreamMode.Write);
cstream.Write(toEncrypt, 0, toEncrypt.Length);
}
finally
{
if (cstream != null)
Aes.Clear();
cstream.Close();
}
Console.WriteLine(CNetwork.ByteArrayToString(mem.ToArray()));
return mem.ToArray();
}
public string Decrypt(string strEncryptedText)
{
if (strEncryptedText == null || strEncryptedText.Equals(""))
return strEncryptedText;
string strDecryptedText = null;
RijndaelManaged rijndael = new RijndaelManaged();
ICryptoTransform decryptor = rijndael.CreateDecryptor(Key, IV);
byte[] byteEncryptedText = Convert.FromBase64String(strEncryptedText);
MemoryStream memStream = new MemoryStream(byteEncryptedText);
CryptoStream decryptStream = null;
try
{
decryptStream = new CryptoStream(memStream, decryptor, CryptoStreamMode.Read);
byte[] byteDecryptedText = new byte[byteEncryptedText.Length];
int decryptedByteCount = decryptStream.Read(byteDecryptedText, 0, byteDecryptedText.Length);
strDecryptedText = Encoding.UTF8.GetString(byteDecryptedText, 0, decryptedByteCount);
}
finally
{
if (rijndael != null) rijndael.Clear();
if (decryptor != null) decryptor.Dispose();
if (memStream != null) memStream.Close();
if (decryptStream != null) decryptStream.Close();
}
if (UseSalt)
strDecryptedText = strDecryptedText.Substring(8);
return strDecryptedText;
}
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);
}
}
// Decrypt a byte array into a byte array using a key and an IV
public static byte[] Decrypt(byte[] cipherData, byte[] Key, byte[] IV, CipherMode cipherMode, PaddingMode paddingMode)
{
// Create a MemoryStream that is going to accept the
// decrypted bytes
MemoryStream ms = new MemoryStream();
// Create a symmetric algorithm.
// We are going to use Rijndael because it is strong and
// available on all platforms.
// You can use other algorithms, to do so substitute the next
// line with something like
// TripleDES alg = TripleDES.Create();
Rijndael alg = Rijndael.Create();
// Now set the key and the IV.
// We need the IV (Initialization Vector) because the algorithm
// is operating in its default
// mode called CBC (Cipher Block Chaining). The IV is XORed with
// the first block (8 byte)
// of the data after it is decrypted, and then each decrypted
// block is XORed with the previous
// cipher block. This is done to make encryption more secure.
// There is also a mode called ECB which does not need an IV,
// but it is much less secure.
alg.Mode = cipherMode;
alg.Padding = paddingMode;
alg.Key = Key;
alg.IV = IV;
// Create a CryptoStream through which we are going to be
// pumping our data.
// CryptoStreamMode.Write means that we are going to be
// writing data to the stream
// and the output will be written in the MemoryStream
// we have provided.
CryptoStream cs = new CryptoStream(ms,
alg.CreateDecryptor(), CryptoStreamMode.Write);
// Write the data and make it do the decryption
cs.Write(cipherData, 0, cipherData.Length);
// Close the crypto stream (or do FlushFinalBlock).
// This will tell it that we have done our decryption
// and there is no more data coming in,
// and it is now a good time to remove the padding
// and finalize the decryption process.
cs.Close();
// Now get the decrypted data from the MemoryStream.
// Some people make a mistake of using GetBuffer() here,
// which is not the right way.
byte[] decryptedData = ms.ToArray();
return decryptedData;
}
/// <summary>
/// AES解密(无向量)
/// </summary>
/// <param name="encryptedBytes">被加密的明文</param>
/// <param name="key">密钥</param>
/// <returns>明文</returns>
public static string AESDecryptWithoutVector(String Data, String Key)
{
Byte[] encryptedBytes = Convert.FromBase64String(Data);
Byte[] bKey = new Byte[32];
Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length);
MemoryStream mStream = new MemoryStream(encryptedBytes);
//mStream.Write( encryptedBytes, 0, encryptedBytes.Length );
//mStream.Seek( 0, SeekOrigin.Begin );
RijndaelManaged aes = new RijndaelManaged();
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = 128;
aes.Key = bKey;
//aes.IV = _iV;
CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateDecryptor(), CryptoStreamMode.Read);
try
{
byte[] tmp = new byte[encryptedBytes.Length + 32];
int len = cryptoStream.Read(tmp, 0, encryptedBytes.Length + 32);
byte[] ret = new byte[len];
Array.Copy(tmp, 0, ret, 0, len);
return Encoding.UTF8.GetString(ret);
}
finally
{
cryptoStream.Close();
mStream.Close();
aes.Clear();
}
}
public static string Decrypt(string cipherText, string passPhrase)
{
// Get the complete stream of bytes that represent:
// [32 bytes of Salt] + [32 bytes of IV] + [n bytes of CipherText]
var cipherTextBytesWithSaltAndIv = Convert.FromBase64String(cipherText);
// Get the saltbytes by extracting the first 32 bytes from the supplied cipherText bytes.
var saltStringBytes = cipherTextBytesWithSaltAndIv.Take(Keysize / 8).ToArray();
// Get the IV bytes by extracting the next 32 bytes from the supplied cipherText bytes.
var ivStringBytes = cipherTextBytesWithSaltAndIv.Skip(Keysize / 8).Take(Keysize / 8).ToArray();
// Get the actual cipher text bytes by removing the first 64 bytes from the cipherText string.
var cipherTextBytes = cipherTextBytesWithSaltAndIv.Skip((Keysize / 8) * 2).Take(cipherTextBytesWithSaltAndIv.Length - ((Keysize / 8) * 2)).ToArray();
var password = new Rfc2898DeriveBytes(passPhrase, saltStringBytes, DerivationIterations);
var keyBytes = password.GetBytes(Keysize / 8);
using (var symmetricKey = new RijndaelManaged())
{
symmetricKey.BlockSize = 256;
symmetricKey.Mode = CipherMode.CBC;
symmetricKey.Padding = PaddingMode.PKCS7;
using (var decryptor = symmetricKey.CreateDecryptor(keyBytes, ivStringBytes))
{
using (var memoryStream = new MemoryStream(cipherTextBytes))
{
using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
var plainTextBytes = new byte[cipherTextBytes.Length];
var decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
memoryStream.Close();
cryptoStream.Close();
return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
}
}
}
}
}
public static void DecryptFile(string strKey, string pathCypheredTextFile, string pathPlainTextFile)
{
// Place la clé de déchiffrement dans un tableau d'octets
byte[] key = GenerateAlgotihmInputs(strKey);
// Place le vecteur d'initialisation dans un tableau d'octets
byte[] iv = GenerateAlgotihmInputs(strKey);
// Filestream of the new file that will be decrypted.
Directory.CreateDirectory(Directory.GetParent(pathPlainTextFile).FullName);
FileStream fsCrypt = new FileStream(pathPlainTextFile, FileMode.Create);
RijndaelManaged rijndael = new RijndaelManaged();
rijndael.Mode = CipherMode.CBC;
rijndael.Key = key;
rijndael.IV = iv;
ICryptoTransform aesDecryptor = rijndael.CreateDecryptor();
CryptoStream cs = new CryptoStream(fsCrypt, aesDecryptor, CryptoStreamMode.Write);
// FileStream of the file that is currently encrypted.
FileStream fsIn = new FileStream(pathCypheredTextFile, FileMode.OpenOrCreate);
int data;
while ((data = fsIn.ReadByte()) != -1)
cs.WriteByte((byte)data);
cs.Close();
fsIn.Close();
fsCrypt.Close();
}
public static byte[] InternalEncrypt(byte[] data, out byte[] key, out byte[] IV)
{
byte[] bytes = null;
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.ICryptoTransform trans = GetEncServiceProvider(out key, out IV);
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, trans, System.Security.Cryptography.CryptoStreamMode.Write);
try
{
cs.Write(data, 0, data.Length);
if (cs != null)
{
cs.FlushFinalBlock();
cs.Close();
}
bytes = ms.ToArray();
}
finally
{
if (cs != null)
{
cs.Close();
}
if (ms != null)
{
ms.Close();
}
}
return(bytes);
}
/// <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);
}
/// <summary>
/// 解密
/// </summary>
public static string AESDecrypt(string input)
{
byte[] encryptBytes = Convert.FromBase64String(input);
byte[] salt = Encoding.UTF8.GetBytes(saltValue);
System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged( );
System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt);
aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
aes.KeySize = aes.LegalKeySizes[0].MaxSize;
aes.Key = rfc.GetBytes(aes.KeySize / 8);
aes.IV = rfc.GetBytes(aes.BlockSize / 8);
// 用当前的 Key 属性和初始化向量 IV 创建对称解密器对象
System.Security.Cryptography.ICryptoTransform decryptTransform = aes.CreateDecryptor( );
// 解密后的输出流
System.IO.MemoryStream decryptStream = new System.IO.MemoryStream( );
// 将解密后的目标流（decryptStream）与解密转换（decryptTransform）相连接
System.Security.Cryptography.CryptoStream decryptor = new System.Security.Cryptography.CryptoStream(
decryptStream, decryptTransform, System.Security.Cryptography.CryptoStreamMode.Write);
// 将一个字节序列写入当前 CryptoStream （完成解密的过程）
decryptor.Write(encryptBytes, 0, encryptBytes.Length);
decryptor.Close( );
// 将解密后所得到的流转换为字符串
byte[] decryptBytes = decryptStream.ToArray( );
string decryptedString = UTF8Encoding.UTF8.GetString(decryptBytes, 0, decryptBytes.Length);
return(decryptedString);
}
/// <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));
}
public override void Load()
{
if ((File.Exists(DataFilename)) && (new FileInfo(DataFilename).Length != 0))
{
try
{
using (Stream stream = File.Open(DataFilename, FileMode.Open))
using (DESCryptoServiceProvider crypt = new DESCryptoServiceProvider())
{
BinaryFormatter bin = new BinaryFormatter();
crypt.Key = ASCIIEncoding.ASCII.GetBytes("ABCDEFGH");
crypt.IV = ASCIIEncoding.ASCII.GetBytes("ABCDEFGH");
CryptoStream crStream = new CryptoStream(stream,
crypt.CreateDecryptor(), CryptoStreamMode.Read);
_list = (List<MB>)bin.Deserialize(crStream);
crStream.Close();
}
}
catch (Exception)
{
}
}
}
public static string AESEncrypt(string encryptStr, string encryptKey)
{
string result;
if (string.IsNullOrWhiteSpace(encryptStr))
{
result = string.Empty;
}
else
{
encryptKey = StringHelper.SubString(encryptKey, 32);
encryptKey = encryptKey.PadRight(32, ' ');
System.Security.Cryptography.SymmetricAlgorithm symmetricAlgorithm = System.Security.Cryptography.Rijndael.Create();
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(encryptStr);
symmetricAlgorithm.Key = System.Text.Encoding.UTF8.GetBytes(encryptKey);
symmetricAlgorithm.IV = SecureHelper._aeskeys;
byte[] inArray = null;
using (System.IO.MemoryStream memoryStream = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, symmetricAlgorithm.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cryptoStream.Write(bytes, 0, bytes.Length);
cryptoStream.FlushFinalBlock();
inArray = memoryStream.ToArray();
cryptoStream.Close();
memoryStream.Close();
}
}
result = System.Convert.ToBase64String(inArray);
}
return(result);
}
public string Decrypt(string encrypted_str)
{
Twofish fish = new Twofish();
fish.Mode = CipherMode.ECB;
byte[] plainText = {};
//create Twofish Decryptor from our twofish instance
ICryptoTransform decrypt = fish.CreateDecryptor(key, plainText);
System.IO.MemoryStream msD = new System.IO.MemoryStream();
//create crypto stream set to read and do a Twofish decryption transform on incoming bytes
CryptoStream cryptostreamDecr = new CryptoStream(msD, decrypt, CryptoStreamMode.Write);
byte[] bytOut = GetBytes(encrypted_str);
//write out Twofish encrypted stream
cryptostreamDecr.Write(bytOut, 0, bytOut.Length);
cryptostreamDecr.Close();
byte[] bytOutD = msD.GetBuffer();
return GetString(bytOutD);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="sIn"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public string Encrypt(string sIn, string sKey = "ColtSmart")
{
byte[] inputByteArray = System.Text.Encoding.ASCII.GetBytes(sIn);
using (System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider())
{
des.Mode = CipherMode.ECB;
des.Padding = PaddingMode.Zeros;
byte[] keyByteArray = new byte[8];
byte[] inputKeyByteArray = ASCIIEncoding.ASCII.GetBytes(sKey);
for (int i = 0; i < 8; i++)
{
if (inputKeyByteArray.Length > i)
{
keyByteArray[i] = inputKeyByteArray[i];
}
else
{
keyByteArray[i] = 0;
}
}
des.Key = keyByteArray;
System.IO.MemoryStream ms = new System.IO.MemoryStream();
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
string str = Convert.ToBase64String(ms.ToArray());
ms.Close();
return(str);
}
}
public byte[] digest()
{
sc.Close();
byte[] res = md.Hash;
init();
return(res);
}
public string Encrypt(string clearText, string EncryptionKey)
{
byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
using (Aes encryptor = Aes.Create())
{
System.Security.Cryptography.Rfc2898DeriveBytes pdb = new System.Security.Cryptography.Rfc2898DeriveBytes(EncryptionKey, new byte[]
{
73,
118,
97,
110,
32,
77,
101,
100,
118,
101,
100,
101,
118
});
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, encryptor.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
clearText = System.Convert.ToBase64String(ms.ToArray());
}
}
return(clearText);
}
/// <summary>
/// Encrypts the specified clear data.
/// </summary>
/// <param name="clearData">The clear data.</param>
/// <param name="Key">The key.</param>
/// <param name="IV">The IV.</param>
/// <returns></returns>
private static byte[] Encrypt(byte[] clearData, byte[] Key, byte[] IV)
{
Rijndael algorithm = Rijndael.Create();
algorithm.Key = Key;
algorithm.IV = IV;
if (ConfigurationManager.AppSettings["EncryptionBlockSize"] != null)
{
int blocksize = int.Parse(ConfigurationManager.AppSettings["EncryptionBlockSize"], NumberStyles.Integer, CultureInfo.InvariantCulture);
if (blocksize != 128 && blocksize != 192 && blocksize != 256)
throw new ConfigurationErrorsException("Please provide a block size. Supported block size is: 128, 192, or 256 bits.");
algorithm.BlockSize = blocksize;
}
else
{
algorithm.BlockSize = 128;
}
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, algorithm.CreateEncryptor(), CryptoStreamMode.Write);
cryptoStream.Write(clearData, 0, clearData.Length);
cryptoStream.Close();
byte[] encryptedData = memoryStream.ToArray();
return encryptedData;
}
private static string CryKey = "Xky_Lq_Py_Hu_Lp_Jhj_Zxt";//密钥
/// <summary>
/// 加密字符串
/// </summary>
public static string Encrypt(string PlainText)
{
System.Security.Cryptography.DESCryptoServiceProvider key = new System.Security.Cryptography.DESCryptoServiceProvider();
byte[] bk = System.Text.Encoding.Unicode.GetBytes(CryKey);
byte[] bs = new byte[8];
for (int i = 0; i < bs.Length; i++)
{
bs[i] = bk[i];
}
key.Key = bs;
key.IV = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream encStream = new System.Security.Cryptography.CryptoStream(ms, key.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
System.IO.StreamWriter sw = new System.IO.StreamWriter(encStream);
sw.WriteLine(PlainText);
sw.Close();
encStream.Close();
byte[] buffer = ms.ToArray();
ms.Close();
string s = "";
for (int i = 0; i < buffer.Length; i++)
{
s += buffer[i].ToString("X2");
}
return(s);
}
/// <summary>
/// 解密字符串
/// </summary>
public static string Decrypt(string CypherText)
{
System.Security.Cryptography.DESCryptoServiceProvider key = new System.Security.Cryptography.DESCryptoServiceProvider();
byte[] bk = System.Text.Encoding.Unicode.GetBytes(CryKey);
byte[] bs = new byte[8];
for (int i = 0; i < bs.Length; i++)
{
bs[i] = bk[i];
}
key.Key = bs;
key.IV = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
byte[] bc = new byte[CypherText.Length / 2];
for (int i = 0; i < bc.Length; i++)
{
try
{
bc[i] = Convert.ToByte(CypherText.Substring(2 * i, 2), 16);
}
catch { }
}
System.IO.MemoryStream ms = new System.IO.MemoryStream(bc);
System.Security.Cryptography.CryptoStream encStream = new System.Security.Cryptography.CryptoStream(ms, key.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Read);
System.IO.StreamReader sr = new System.IO.StreamReader(encStream);
string val = sr.ReadLine();
sr.Close();
encStream.Close();
ms.Close();
return(val);
}
public static string Encrypt3DES(string a_strString, string a_strKey, string a_strIV)
{
System.Security.Cryptography.TripleDESCryptoServiceProvider des = new System.Security.Cryptography.TripleDESCryptoServiceProvider();
byte[] inputByteArray = System.Text.Encoding.UTF8.GetBytes(a_strString);
des.Key = System.Text.Encoding.UTF8.GetBytes(a_strKey);
des.IV = System.Text.Encoding.UTF8.GetBytes(a_strIV);
des.Mode = System.Security.Cryptography.CipherMode.CBC;
des.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
System.IO.StreamWriter swEncrypt = new System.IO.StreamWriter(cs);
swEncrypt.WriteLine(a_strString);
swEncrypt.Close();
//把内存流转换成字节数组，内存流现在已经是密文了
byte[] bytesCipher = ms.ToArray();
string base64String = System.Convert.ToBase64String(bytesCipher);
//加密流关闭
cs.Close();
des.Clear();
ms.Close();
return(base64String);
}
public int dbEncrypt(String partition, int size, String data, out String dataOut)
{
AesManaged aes = null;
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
try
{
aes = new AesManaged();
aes.Key = readKeyFromFile(partition);
memoryStream = new MemoryStream();
cryptoStream = new CryptoStream(memoryStream, aes.CreateEncryptor(), CryptoStreamMode.Write);
byte[] buf = Encoding.UTF8.GetBytes(data);
cryptoStream.Write(buf, 0, buf.Length);
cryptoStream.FlushFinalBlock();
dataOut = Convert.ToBase64String(memoryStream.ToArray());
}
finally
{
if (cryptoStream != null)
cryptoStream.Close();
if (memoryStream != null)
memoryStream.Close();
if (aes != null)
aes.Clear();
}
return getErrorCode() == 0 ? 1 : 0;
}
/// <summary>
/// 加密
/// </summary>
public static string AESEncrypt(string input)
{
byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(input);
byte[] salt = System.Text.UTF8Encoding.UTF8.GetBytes(saltValue);
// AesManaged - 高级加密标准(AES) 对称算法的管理类
System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged( );
// Rfc2898DeriveBytes - 通过使用基于 HMACSHA1 的伪随机数生成器，实现基于密码的密钥派生功能 (PBKDF2 - 一种基于密码的密钥派生函数)
// 通过 密码 和 salt 派生密钥
System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt);
aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
aes.KeySize = aes.LegalKeySizes[0].MaxSize;
aes.Key = rfc.GetBytes(aes.KeySize / 8);
aes.IV = rfc.GetBytes(aes.BlockSize / 8);
// 用当前的 Key 属性和初始化向量 IV 创建对称加密器对象
System.Security.Cryptography.ICryptoTransform encryptTransform = aes.CreateEncryptor( );
// 加密后的输出流
System.IO.MemoryStream encryptStream = new System.IO.MemoryStream( );
// 将加密后的目标流（encryptStream）与加密转换（encryptTransform）相连接
System.Security.Cryptography.CryptoStream encryptor = new System.Security.Cryptography.CryptoStream
(encryptStream, encryptTransform, System.Security.Cryptography.CryptoStreamMode.Write);
// 将一个字节序列写入当前 CryptoStream （完成加密的过程）
encryptor.Write(data, 0, data.Length);
encryptor.Close( );
// 将加密后所得到的流转换成字节数组，再用Base64编码将其转换为字符串
string encryptedString = Convert.ToBase64String(encryptStream.ToArray( ));
return(encryptedString);
}
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();
}
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="encryptString"></param>
/// <returns></returns>
public static string Encrypt(string encryptString)
{
System.IO.MemoryStream mStream = null;
System.Security.Cryptography.CryptoStream cStream = null;
try
{
EncryptUtil des = new EncryptUtil();
byte[] rgbKey = Encoding.UTF8.GetBytes(des.encryptKey.Substring(0, 8));
byte[] rgbIV = Encoding.UTF8.GetBytes(des.encryptIV.Substring(0, 8));
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
System.Security.Cryptography.DESCryptoServiceProvider dCSP = new System.Security.Cryptography.DESCryptoServiceProvider();
mStream = new System.IO.MemoryStream();
cStream = new System.Security.Cryptography.CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), System.Security.Cryptography.CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Convert.ToBase64String(mStream.ToArray()));
}
catch (Exception)
{
return(encryptString);
}
finally
{
if (mStream != null)
{
mStream.Close(); mStream.Dispose();
}
if (cStream != null)
{
cStream.Close(); cStream.Dispose();
}
}
}
/// <summary>
/// Método para encriptar em AES
/// </summary>
/// <param name="plaintext"></param>
/// <param name="text"></param>
/// <returns></returns>
public static byte[] Encrypt(byte[] plaintext, string text)
{
/*
* Block Length: 128bit
* Block Mode: ECB
* Data Padding: Padded by bytes which Asc() equal for number of padded bytes (done automagically)
* Key Padding: 0x00 padded to multiple of 16 bytes
* IV: None
*/
byte[] key = System.Text.ASCIIEncoding.ASCII.GetBytes(text);
System.Security.Cryptography.RijndaelManaged AES = new System.Security.Cryptography.RijndaelManaged();
AES.BlockSize = 128;
AES.Mode = System.Security.Cryptography.CipherMode.ECB;
AES.Key = key;
System.Security.Cryptography.ICryptoTransform encryptor = AES.CreateEncryptor();
MemoryStream mem = new MemoryStream();
System.Security.Cryptography.CryptoStream cryptStream = new System.Security.Cryptography.CryptoStream(mem, encryptor,
System.Security.Cryptography.CryptoStreamMode.Write);
cryptStream.Write(plaintext, 0, plaintext.Length);
cryptStream.FlushFinalBlock();
byte[] cypher = mem.ToArray();
cryptStream.Close();
cryptStream = null;
encryptor.Dispose();
AES = null;
return(cypher);
}
public static void Main()
{
//chave secreta
byte[] Key = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
//vetor de inicialização
byte[] IV = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
//Stream de memória
IO.MemoryStream memstream = new IO.MemoryStream(15);
//Stream de criptografia
CP.RC2CryptoServiceProvider provider = new CP.RC2CryptoServiceProvider();
CP.ICryptoTransform transform = provider.CreateEncryptor(Key, IV);
CP.CryptoStreamMode mode = CP.CryptoStreamMode.Write;
CP.CryptoStream stream = new CP.CryptoStream(memstream, transform, mode);
//Lê cada caracter da string
foreach (char ch in "Isto é um teste")
{
stream.WriteByte((Convert.ToByte(ch)));
}
int c;
//Reposiciona o ponteiro para leitura
memstream.Position = c = 0; //técnica não trivial, mas válida
while ((c = memstream.ReadByte()) != -1)
{
Console.Write((char)c);
}
stream.Close(); //Libera a stream (crypto)
memstream.Close(); //Libera a stream (mem)
}
/// <summary>
/// A simply rijndael aes encryption, can be used to store passwords
/// </summary>
/// <param name="ClearText">the string to call upon</param>
/// <returns>an encryped string in base64 form</returns>
public static string Encrypt(this string ClearText)
{
string returnValue = ClearText;
try
{
byte[] clearTextBytes = Encoding.ASCII.GetBytes(ClearText);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
using (MemoryStream ms = new MemoryStream())
{
byte[] rgbIV = Encoding.ASCII.GetBytes(RGBIV);
byte[] key = Encoding.ASCII.GetBytes(KEY);
CryptoStream cs = new CryptoStream(ms, rijn.CreateEncryptor(key, rgbIV), CryptoStreamMode.Write);
cs.Write(clearTextBytes, 0, clearTextBytes.Length);
cs.Close();
returnValue = Convert.ToBase64String(ms.ToArray());
}
}
catch (Exception ex)
{
LOG.ErrorFormat("Error encrypting, error: ", ex.Message);
}
return returnValue;
}
/// <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>
private 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 byte[] aes_decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes, byte[] iv)
{
byte[] decryptedBytes = null;
using (MemoryStream ms = new MemoryStream())
{
using (RijndaelManaged AES = new RijndaelManaged())
{
AES.KeySize = 256;
AES.BlockSize = 128;
AES.Padding = PaddingMode.ANSIX923;
AES.Key = passwordBytes;
AES.IV = iv;
AES.Mode = CipherMode.CBC;
try
{
using (var cs = new CryptoStream(ms, AES.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
cs.FlushFinalBlock();
cs.Close();
}
decryptedBytes = ms.ToArray();
}
catch
{
Console.WriteLine("Error in decryption process");
Environment.Exit(1);
}
}
}
return decryptedBytes;
}
public string Decrypt(string CypherText)
{
string outText = string.Empty;
System.Security.Cryptography.CryptoStream myCryptoStream = null;
try
{
System.Byte[] data = System.Convert.FromBase64String(CypherText);
System.IO.MemoryStream memStream = new System.IO.MemoryStream(data.Length);
myrijManaged.Key = keyByte;
myrijManaged.IV = IVByte;
System.Security.Cryptography.ICryptoTransform myCryptoTransform = myrijManaged.CreateDecryptor();
myCryptoStream = new System.Security.Cryptography.CryptoStream(memStream, myCryptoTransform, System.Security.Cryptography.CryptoStreamMode.Read);
memStream.Write(data, 0, data.Length);
memStream.Position = 0;
outText = new System.IO.StreamReader(myCryptoStream).ReadToEnd();
}
catch (Exception exp)
{
throw exp;
}
finally
{
if (myCryptoStream != null)
{
myCryptoStream.Close();
}
}
return(outText);
}
public byte[] Decrypt(byte[] file)
{
Twofish fish = new Twofish();
fish.Mode = CipherMode.ECB;
byte[] dummy = { };
//create Twofish Decryptor from our twofish instance
ICryptoTransform decrypt = fish.CreateDecryptor(key, dummy);
System.IO.MemoryStream msD = new System.IO.MemoryStream();
//create crypto stream set to read and do a Twofish decryption transform on incoming bytes
CryptoStream cryptostreamDecr = new CryptoStream(msD, decrypt, CryptoStreamMode.Write);
//write out Twofish encrypted stream
cryptostreamDecr.Write(file, 0, file.Length);
cryptostreamDecr.Close();
byte[] buf = msD.GetBuffer();
// TODO: It might be pretty dangerous to cut on the size of the input buffer
// because of the padding some bytes might be added. However these bytes will
// be only zeros (External.Twofish uses Padding.Zero) so zeros should be OK.
Array.Resize(ref buf, file.Length);
// We can not remove any other padding bytes because we can not distinuish between
// bytes added by the crypto algo and bytes belonging to the original unecrtypted file.
return buf;
}
public string Encrypt(string Text)
{
string outText = string.Empty;
System.Security.Cryptography.CryptoStream myCryptoStream = null;
try
{
System.Byte[] bufferRead = System.Text.Encoding.ASCII.GetBytes(Text);
System.IO.MemoryStream myOutMemStream = new System.IO.MemoryStream(1024);
myrijManaged.Key = keyByte;
myrijManaged.IV = IVByte;
System.Security.Cryptography.ICryptoTransform myCryptoTransform = myrijManaged.CreateEncryptor();
myCryptoStream = new System.Security.Cryptography.CryptoStream(myOutMemStream, myCryptoTransform, System.Security.Cryptography.CryptoStreamMode.Write);
myCryptoStream.Write(bufferRead, 0, bufferRead.Length);
myCryptoStream.FlushFinalBlock();
System.Byte[] result = new byte[(int)myOutMemStream.Position];
myOutMemStream.Position = 0;
myOutMemStream.Read(result, 0, result.Length);
outText = System.Convert.ToBase64String(result);
}
catch (Exception exp)
{
throw exp;
}
finally
{
if (myCryptoStream != null)
{
myCryptoStream.Close();
}
}
return(outText);
}
/// <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;
}
public static void DecryptFile(string inputFile, string outputFile, string keyIV)
{
byte[] array = new byte[0x20];
byte[] buffer2 = new byte[0x10];
HexStringToByteArray(keyIV, array, 0);
HexStringToByteArray(keyIV, buffer2, 0x40);
FileStream stream = File.Open(inputFile, System.IO.FileMode.Open);
FileStream stream2 = File.Open(outputFile, System.IO.FileMode.CreateNew);
AesManaged managed = new AesManaged {
Key = array,
IV = buffer2
};
CryptoStream stream3 = new CryptoStream(stream, managed.CreateDecryptor(managed.Key, managed.IV), CryptoStreamMode.Read);
try
{
int num;
byte[] buffer = new byte[0xa000];
while ((num = stream3.Read(buffer, 0, buffer.Length)) > 0)
{
stream2.Write(buffer, 0, num);
}
}
finally
{
stream3.Close();
stream.Close();
stream2.Close();
}
}
public static string EncryptString(string _inputString,
string sKey)
{
string sInputFilename = string.Empty;
string sOutputFilename = string.Empty;
FileStream fsInput = new FileStream(_inputString,
FileMode.Open,
FileAccess.Read);
FileStream fsEncrypted = new FileStream(sOutputFilename,
FileMode.Create,
FileAccess.Write);
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
ICryptoTransform desencrypt = DES.CreateEncryptor();
CryptoStream cryptostream = new CryptoStream(fsEncrypted,
desencrypt,
CryptoStreamMode.Write);
byte[] bytearrayinput = new byte[_inputString.Length];
fsInput.Read(bytearrayinput, 0, bytearrayinput.Length);
cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length);
cryptostream.Close();
fsInput.Close();
fsEncrypted.Close();
return bytearrayinput.ToString();
}
/// <summary>
/// A chave deve possuir 16 com caracteres "1234567890123456"
/// </summary>
/// <param name="str"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string GetCriptografiaSimetrica(this string str, string key)
{
using (TripleDESCryptoServiceProvider provider = new TripleDESCryptoServiceProvider())
{
provider.Mode = CipherMode.CFB;
provider.Padding = PaddingMode.PKCS7;
MemoryStream mStream = new MemoryStream();
CryptoStream cs = new CryptoStream(mStream, provider.CreateEncryptor(Encoding.UTF8.GetBytes(key), new byte[] { 138, 154, 251, 188, 64, 108, 167, 121 }), CryptoStreamMode.Write);
byte[] toEncrypt = new UTF8Encoding().GetBytes(str);
cs.Write(toEncrypt, 0, toEncrypt.Length);
cs.FlushFinalBlock();
byte[] ret = mStream.ToArray();
mStream.Close();
cs.Close();
str = Convert.ToBase64String(ret);
}
return str;
}
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="inputStr">输入字符串</param>
/// <param name="keyStr">密码，可以为“”</param>
/// <returns>输出加密后字符串</returns>
public string EncryptString(string inputStr, string keyStr)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
if (keyStr == "")
keyStr = key;
byte[] inputByteArray = Encoding.Default.GetBytes(inputStr);
byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
SHA1 ha = new SHA1Managed();
byte[] hb = ha.ComputeHash(keyByteArray);
sKey = new byte[8];
sIV = new byte[8];
for (int i = 0; i < 8; i++)
sKey[i] = hb[i];
for (int i = 8; i < 16; i++)
sIV[i - 8] = hb[i];
des.Key = sKey;
des.IV = sIV;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
cs.Close();
ms.Close();
return ret.ToString();
}
public static string AESDecrypt(string decryptStr, string decryptKey)
{
string result;
if (string.IsNullOrWhiteSpace(decryptStr))
{
result = string.Empty;
}
else
{
decryptKey = StringHelper.SubString(decryptKey, 32);
decryptKey = decryptKey.PadRight(32, ' ');
byte[] array = System.Convert.FromBase64String(decryptStr);
System.Security.Cryptography.SymmetricAlgorithm symmetricAlgorithm = System.Security.Cryptography.Rijndael.Create();
symmetricAlgorithm.Key = System.Text.Encoding.UTF8.GetBytes(decryptKey);
symmetricAlgorithm.IV = SecureHelper._aeskeys;
byte[] array2 = new byte[array.Length];
using (System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(array))
{
using (System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, symmetricAlgorithm.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Read))
{
cryptoStream.Read(array2, 0, array2.Length);
cryptoStream.Close();
memoryStream.Close();
}
}
result = System.Text.Encoding.UTF8.GetString(array2).Replace("\0", "");
}
return(result);
}
public string mDecryptURLEncode(string EncryptedText)
{
string DecryptedText = "";
System.Security.Cryptography.ICryptoTransform ssd = rc2.CreateDecryptor();
string sEncrypt = HttpUtility.UrlDecode(EncryptedText);
byte[] cipherBytes = Convert.FromBase64String(sEncrypt);
byte[] initialText = null;
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(cipherBytes))
{
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, ssd, System.Security.Cryptography.CryptoStreamMode.Read))
{
int iCount = opGetArrLength(cipherBytes);
initialText = new Byte[cipherBytes.Length];
cs.Read(initialText, 0, initialText.Length);
cs.Close();
cs.Dispose();
}
ms.Close();
ms.Dispose();
}
DecryptedText = System.Text.UTF8Encoding.UTF8.GetString(initialText);
return(DecryptedText = DecryptedText.Replace("\0", ""));
}
public static byte[] smethod_3(byte[] byte_0, string string_0)
{
System.Security.Cryptography.Rijndael rijndael = System.Security.Cryptography.Rijndael.Create();
System.Security.Cryptography.Rfc2898DeriveBytes rfc2898DeriveBytes = new System.Security.Cryptography.Rfc2898DeriveBytes(string_0, new byte[]
{
38,
220,
255,
0,
173,
237,
122,
238,
197,
254,
7,
175,
77,
8,
34,
60
});
rijndael.Key = rfc2898DeriveBytes.GetBytes(32);
rijndael.IV = rfc2898DeriveBytes.GetBytes(16);
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, rijndael.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cryptoStream.Write(byte_0, 0, byte_0.Length);
cryptoStream.Close();
return(memoryStream.ToArray());
}
/// <summary>
/// A chave deve possuir 16 com caracteres "1234567890123456"
/// </summary>
/// <param name="str"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string GetDescriptografiaSimetrica(this string str, string key)
{
using (TripleDESCryptoServiceProvider provider = new TripleDESCryptoServiceProvider())
{
provider.Mode = CipherMode.CFB;
provider.Padding = PaddingMode.PKCS7;
byte[] inputEquivalent = Convert.FromBase64String(str);
MemoryStream msDecrypt = new MemoryStream();
CryptoStream csDecrypt = new CryptoStream(msDecrypt, provider.CreateDecryptor(Encoding.UTF8.GetBytes(key), new byte[] { 138, 154, 251, 188, 64, 108, 167, 121 }), CryptoStreamMode.Write);
csDecrypt.Write(inputEquivalent, 0, inputEquivalent.Length);
csDecrypt.FlushFinalBlock();
csDecrypt.Close();
str = Encoding.UTF8.GetString(msDecrypt.ToArray());
msDecrypt.Close();
}
return str;
}
public static string TripleDESDecrypt(string pToDecrypt, string key = "")
{
string result;
try
{
key = (string.IsNullOrWhiteSpace(key) ? EncryptHelper.strKey : key);
byte[] array = new byte[pToDecrypt.Length / 2];
for (int i = 0; i < pToDecrypt.Length / 2; i++)
{
int num = System.Convert.ToInt32(pToDecrypt.Substring(i * 2, 2), 16);
array[i] = (byte)num;
}
TripleDESCryptoServiceProvider tripleDESCryptoServiceProvider = new System.Security.Cryptography.TripleDESCryptoServiceProvider();
tripleDESCryptoServiceProvider.Key = System.Text.Encoding.ASCII.GetBytes(key);
tripleDESCryptoServiceProvider.Mode = System.Security.Cryptography.CipherMode.ECB;
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, tripleDESCryptoServiceProvider.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cryptoStream.Write(array, 0, array.Length);
cryptoStream.FlushFinalBlock();
cryptoStream.Close();
memoryStream.Close();
result = System.Text.Encoding.UTF8.GetString(memoryStream.ToArray());
}
catch (Exception ex)
{
result = ex.ToString();
}
return(result);
}
public static byte[] Desencriptar(byte[] mensajeEncriptado,
SymmetricAlgorithm algoritmo)
{
int numeroBytesDesencriptados = 0;
// La clase SymmetricAlgorithm delega el proceso de desencriptación de datos
// Una instancia de ICryptoTransform transforma texto plano en texto cifrado o vice versa.
// Las siguiente sentencia demuestra como crear transformaciones usando CreateDecryptor.
byte[] mensajeDesencriptado = new
byte[mensajeEncriptado.Length];
// Crear una ICryptoTransform que puede ser usada para desencriptar datos
ICryptoTransform desencriptador =
algoritmo.CreateDecryptor();
// Procedemos a descifrar el mensaje
MemoryStream memoryStream = new
MemoryStream(mensajeEncriptado);
// Creamos el CryptoStream
CryptoStream cryptoStream = new CryptoStream(memoryStream,
desencriptador, CryptoStreamMode.Read);
// Decrypting data and get the count of plain text bytes.
numeroBytesDesencriptados = cryptoStream.Read(mensajeDesencriptado, 0, mensajeDesencriptado.Length);
// Liberamos recursos.
memoryStream.Close();
cryptoStream.Close();
return mensajeDesencriptado;
}
public static string Decrypt(string cipherText)
{
//Get the plain text in a byte array
System.Byte[] ByteText = System.Convert.FromBase64String(cipherText);
System.IO.MemoryStream EncStream = new System.IO.MemoryStream(ByteText, 0, ByteText.Length);
//Get the binary format of the hash key
System.Byte[] HashKey = Crypter.FormatKey(Crypter.encrypKey);
System.Byte[] IVector = Crypter.FormatInitializationVector();
Crypter.encryptionProvider.Key = HashKey;
Crypter.encryptionProvider.IV = IVector;
System.Security.Cryptography.ICryptoTransform Encrypter = Crypter.encryptionProvider.CreateDecryptor();
//Create a Stream for the transform
System.Security.Cryptography.CryptoStream Stream = new System.Security.Cryptography.CryptoStream(EncStream, Encrypter, System.Security.Cryptography.CryptoStreamMode.Read);
System.IO.StreamReader PlainText = null;
try
{
PlainText = new System.IO.StreamReader(Stream);
return(PlainText.ReadToEnd());
}
finally
{
PlainText.Close();
Stream.Close();
}
}
public void EncryptFile(string sInputFilename,string sOutputFilename,string sKey)
{
var fsInput = new FileStream(sInputFilename,
FileMode.Open,
FileAccess.Read);
var fsEncrypted = new FileStream(sOutputFilename,
FileMode.Create,
FileAccess.Write);
var DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
ICryptoTransform desencrypt = DES.CreateEncryptor();
var cryptostream = new CryptoStream(fsEncrypted,
desencrypt,
CryptoStreamMode.Write);
byte[] bytearrayinput = new byte[fsInput.Length - 1];
fsInput.Read(bytearrayinput, 0, bytearrayinput.Length);
cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length);
cryptostream.Close();
fsInput.Close();
fsEncrypted.Close();
}
private static string DESEncrypt(string MainKey, string strPlain)
{
string g_strDESKey = ComputeMD5HashHEX(MainKey + g_strDESIV).Substring(0, 8);
string p_strReturn = string.Empty;
try
{
string strDESKey = g_strDESKey;
string strDESIV = g_strDESIV;
byte[] bytesDESKey = System.Text.ASCIIEncoding.ASCII.GetBytes(strDESKey);
byte[] bytesDESIV = System.Text.ASCIIEncoding.ASCII.GetBytes(strDESIV);
System.Security.Cryptography.DESCryptoServiceProvider desEncrypt = new System.Security.Cryptography.DESCryptoServiceProvider();
System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, desEncrypt.CreateEncryptor(bytesDESKey, bytesDESIV), System.Security.Cryptography.CryptoStreamMode.Write);
System.IO.StreamWriter swEncrypt = new System.IO.StreamWriter(csEncrypt);
swEncrypt.WriteLine(strPlain);
swEncrypt.Close();
csEncrypt.Close();
byte[] bytesCipher = msEncrypt.ToArray();
msEncrypt.Close();
p_strReturn = ConvertByteArrayToHex(bytesCipher);
}
catch (System.Exception) { }
return(p_strReturn);
}
/// <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 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());
}
}
}
}
}
/// <summary>
/// 加密文件
/// </summary>
public static void EncryptFile(string Value, string OuputFileName)
{
try
{
// Must be 64 bits, 8 bytes.
// Distribute this key to the user who will decrypt this file.
//Get the Key for the file to Encrypt.
string sKey = GenerateKey();
byte[] b = ASCIIEncoding.ASCII.GetBytes(Value);
System.IO.FileStream fsEncrypted = new System.IO.FileStream(OuputFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
System.Security.Cryptography.DESCryptoServiceProvider DES = new System.Security.Cryptography.DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
System.Security.Cryptography.ICryptoTransform desencrypt = DES.CreateEncryptor();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(fsEncrypted, desencrypt, System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(b, 0, b.Length);
cs.Close();
fsEncrypted.Close();
}
catch (Exception ex)
{
throw ex;
}
}
private void encryptFile(string inputFile, string cryptFile)
{
FileStream fsCrypt = null;
CryptoStream cryptStream = null;
try
{
UnicodeEncoding UE = new UnicodeEncoding();
byte[] key = UE.GetBytes(TPW);
fsCrypt = new FileStream(cryptFile, FileMode.Create);
RijndaelManaged RMCrypto = new RijndaelManaged();
cryptStream = new CryptoStream(fsCrypt,
RMCrypto.CreateEncryptor(key, key),
CryptoStreamMode.Write);
byte[] inBytes = File.ReadAllBytes(inputFile);
cryptStream.Write(inBytes, 0, inBytes.Length);
}
finally
{
if (cryptStream != null)
cryptStream.Close();
if ( fsCrypt != null )
fsCrypt.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;
}
/// <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);
}
public byte[] doFinal()
{
// System.arraycopy(mac.doFinal(), 0, buf, 0, 12);
// return buf;
cs.Close();
Array.Copy(mentalis_mac.Hash, 0, buf, 0, 12);
return(buf);
}
public void doFinal(byte[] buf, int offset)
{
cs.Close();
Array.Copy(mac.Hash, 0, buf, offset, BSIZE);
byte[] key = (byte[])mac.Key.Clone();
mac.Clear();
init(key);
}
public byte[] doFinal()
{
//return mac.doFinal();
cs.Close();
byte[] result = mentalis_mac.Hash;
byte[] key = mentalis_mac.Key;
mentalis_mac.Clear();
init(key);
return(result);
}
public static byte[] smethod_9(byte[] byte_0, string string_0)
{
System.Security.Cryptography.SymmetricAlgorithm symmetricAlgorithm = System.Security.Cryptography.SymmetricAlgorithm.Create();
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
byte[] bytes = System.Text.Encoding.ASCII.GetBytes(string_0);
byte[] rgbIV = bytes;
System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, symmetricAlgorithm.CreateEncryptor(bytes, rgbIV), System.Security.Cryptography.CryptoStreamMode.Write);
cryptoStream.Write(byte_0, 0, byte_0.Length);
cryptoStream.Close();
return(memoryStream.ToArray());
}
private static byte[] AES_Decrypt(byte[] cipherData, byte[] Key, byte[] IV)
{
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
System.Security.Cryptography.Rijndael rijndael = System.Security.Cryptography.Rijndael.Create();
rijndael.Key = Key;
rijndael.IV = IV;
System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, rijndael.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cryptoStream.Write(cipherData, 0, cipherData.Length);
cryptoStream.Close();
return(memoryStream.ToArray());
}
private static void Main(string[] args)
{
string action = "DECRYPT", filePath = "";
if (args.Length < 1 || args[0] == "/?")
{
Console.Error.WriteLine("Aes256 Encryption/Decryption.");
Console.Error.WriteLine();
Console.Error.WriteLine("crypt.exe [-e] <filepath>"); // args[0] args[1]
Console.Error.WriteLine(" -e encrypting the file, default is decrypting");
Console.Error.WriteLine(" <filepath> path of file to be encrypted or decrypted");
Console.Error.WriteLine();
return;
}
else if (args.Length > 1 && args[0] == "-e")
{
action = "ENCRYPT";
filePath = args[1];
}
else
{
filePath = args[0];
}
// [ https://www.codeproject.com/Questions/562372/Theplusinputplusdataplusisplusnotplusapluscomplete ]
FileStream reader = new FileStream(filePath, FileMode.Open, FileAccess.Read);
FileStream writer = new FileStream(filePath + ".out", FileMode.OpenOrCreate, FileAccess.Write);
using (var aes = getAes256Provider()) {
using (ICryptoTransform cryptor = (action == "DECRYPT") ? aes.CreateDecryptor(aes.Key, aes.IV) : aes.CreateEncryptor(aes.Key, aes.IV)) {
//Create a Crypt Stream using the encryptor/decryptor created above
System.Security.Cryptography.CryptoStream cryptoStream
= new System.Security.Cryptography.CryptoStream(writer, cryptor, CryptoStreamMode.Write);
byte[] bites = new byte[1024]; //Stores 1 KB
Int32 bitesRead = 0; //Number of Bytes read
Int64 totalBites = 0; //Total Number of Bytes read
//Loop through the entire file reading 1 kb at a time
while (!(totalBites >= reader.Length))
{
bitesRead = reader.Read(bites, 0, 1024); //Read the bytes from the input file.
cryptoStream.Write(bites, 0, bitesRead); //Write the encrypted bytes to the output file.
totalBites += bitesRead;
}
cryptoStream.Close(); cryptoStream.Dispose();
cryptor.Dispose();
}
}
//Close and release streams:
reader.Close(); reader.Dispose();
writer.Close(); writer.Dispose();
}
