| public CreateEncryptor ( ) : ICryptoTransform | ||
| return | ICryptoTransform | |
public String EncryptIt(String s)
{
Encoding byteEncoder = Encoding.UTF8;
byte[] rijnKey = byteEncoder.GetBytes("h504lXb1erd4ilw7"); //this is key for encrypt data
byte[] rijnIV = byteEncoder.GetBytes("4hx7e4bwM15d0CrL"); //this is iv for encrypt data
String result;
AesManaged rijn = new AesManaged();
//Using AES-128
rijn.KeySize = 128;
rijn.BlockSize = 128;
using (MemoryStream msEncrypt = new MemoryStream())
{
using (ICryptoTransform encryptor = rijn.CreateEncryptor(rijnKey, rijnIV))
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(s);
}
}
}
result = Convert.ToBase64String(msEncrypt.ToArray());
}
rijn.Clear();
return result;
}
public static string Encrypt(string plainText, string key)
{
if (string.IsNullOrEmpty(plainText))
throw new ArgumentNullException("plainText");
if (string.IsNullOrEmpty(key))
throw new ArgumentNullException("key");
using (var keyDerivationFunction = new Rfc2898DeriveBytes(key, _saltSize))
{
var saltBytes = keyDerivationFunction.Salt;
var keyBytes = keyDerivationFunction.GetBytes(32);
var ivBytes = keyDerivationFunction.GetBytes(16);
using (var aesManaged = new AesManaged())
using (var encryptor = aesManaged.CreateEncryptor(keyBytes, ivBytes))
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
using (var streamWriter = new StreamWriter(cryptoStream))
streamWriter.Write(plainText);
var cipherTextBytes = memoryStream.ToArray();
Array.Resize(ref saltBytes, saltBytes.Length + cipherTextBytes.Length);
Array.Copy(cipherTextBytes, 0, saltBytes, _saltSize, cipherTextBytes.Length);
return Convert.ToBase64String(saltBytes);
}
}
}
/// <summary>
/// Encrypts the plainText input using the given Key.
/// A 128 bit random salt will be generated and prepended to the ciphertext before it is returned.
/// </summary>
/// <param name="plainText">The plain text to encrypt.</param>
/// <param name="password">The plain text encryption key.</param>
/// <returns>The salt and the ciphertext</returns>
public static byte[] Encrypt(byte[] plainText, string password)
{
if (plainText == null || plainText.Length == 0) throw new ArgumentNullException("plainText");
if (string.IsNullOrEmpty(password)) throw new ArgumentNullException("password");
// Derive a new Salt, Key, and IV from the password
using (var keyDerivationFunction = new Rfc2898DeriveBytes(password, SaltSize))
{
var saltBytes = keyDerivationFunction.Salt;
var keyBytes = keyDerivationFunction.GetBytes(32);
var ivBytes = keyDerivationFunction.GetBytes(16);
using (var aesManaged = new AesManaged())
using (var encryptor = aesManaged.CreateEncryptor(keyBytes, ivBytes))
using (var memoryStream = new MemoryStream())
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
using (var streamWriter = new BinaryWriter(cryptoStream))
{
streamWriter.Write(plainText);
}
var cipherTextBytes = memoryStream.ToArray();
Array.Resize(ref saltBytes, saltBytes.Length + cipherTextBytes.Length);
Array.Copy(cipherTextBytes, 0, saltBytes, SaltSize, cipherTextBytes.Length);
return saltBytes;
}
}
}
public Secret Encrypt(string plainText)
{
Secret result = new Secret();
using (MemoryStream ms = new MemoryStream())
{
using (Aes aesAlg = new AesManaged())
{
aesAlg.Key = _key;
result.IV = aesAlg.IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor();
using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
{
byte[] rawPlaintext = Encoding.Unicode.GetBytes(plainText);
cs.Write(rawPlaintext, 0, rawPlaintext.Length);
cs.FlushFinalBlock();
// get the encrypted text
ms.Seek(0, SeekOrigin.Begin);
byte[] content = new byte[ms.Length];
ms.Read(content, 0, content.Length);
result.Data = content;
}
}
}
return result;
}
public static bool ForCodeCoverage()
{
AesManaged aes = new AesManaged();
using (ICryptoTransform cte = aes.CreateEncryptor(), ctd = aes.CreateDecryptor())
{
byte[] plain1 = new byte[64];
for (int i = 0; i < plain1.Length; i++)
plain1[i] = (byte)i;
byte[] encr1 = cte.TransformFinalBlock(plain1, 0, plain1.Length);
using(MemoryStream ms = new MemoryStream())
using(CryptoStream cs = new CryptoStream(ms, ctd, CryptoStreamMode.Write))
{
cs.Write(encr1, 0, 16);
cs.Write(encr1, 16, 16);
cs.Write(encr1, 32, 16);
cs.Write(encr1, 48, encr1.Length-48);
cs.FlushFinalBlock();
byte[] plain2 = ms.ToArray();
if (!Compare(plain1, plain2))
{
Console.WriteLine("CodeCoverage case failed");
return false;
}
return true;
}
}
}
public static byte[] EncryptStringToBytes(string plainText, byte[] key, byte[] IV)
{
byte[] encrypted;
using (Aes aesAlg = new AesManaged())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(Encoding.UTF8.GetString(IV, 0, IV.Length), key);
aesAlg.Key = deriveBytes.GetBytes(128 / 8);
aesAlg.IV = aesAlg.Key;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
return encrypted;
}
/// <summary>Encrypt the given string using AES. The string can be decrypted using
/// DecryptStringAes(). The sharedSecret parameters must match.</summary>
/// <param name="plainText">The text to encrypt.</param>
/// <param name="sharedSecret">A password used to generate a key for encryption.</param>
/// <param name="salt">The salt used for encryption.</param>
/// <returns></returns>
public static string EncryptStringAes(string plainText, string sharedSecret, string salt)
{
Guard.AgainstNullOrEmpty(plainText);
Guard.AgainstNullOrEmpty(sharedSecret);
Guard.AgainstNullOrEmpty(salt);
try
{
using (var key = new Rfc2898DeriveBytes(sharedSecret, Encoding.ASCII.GetBytes(salt)))
using (var aesManaged = new AesManaged())
{
aesManaged.Key = key.GetBytes(aesManaged.KeySize / 8);
aesManaged.IV = key.GetBytes(aesManaged.BlockSize / 8);
using (var encryptor = aesManaged.CreateEncryptor(aesManaged.Key, aesManaged.IV))
using (var memoryStream = new MemoryStream())
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
using (var streamWriter = new StreamWriter(cryptoStream))
{
//Write all data to the stream.
streamWriter.Write(plainText);
streamWriter.Close();
return Convert.ToBase64String(memoryStream.ToArray());
}
}
}
catch
{
return string.Empty;
}
}
public static string Encrypt(this string text)
{
if (string.IsNullOrEmpty(text))
{
return null;
}
byte[] rawPlaintext = System.Text.Encoding.Unicode.GetBytes(text);
byte[] cipherText = null;
using (Aes aes = new AesManaged())
{
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = AesKeySizeInBits;
int KeyStrengthInBytes = aes.KeySize / 8;
System.Security.Cryptography.Rfc2898DeriveBytes rfc2898 =
new System.Security.Cryptography.Rfc2898DeriveBytes(Password, Salt, Rfc2898KeygenIterations);
aes.Key = rfc2898.GetBytes(KeyStrengthInBytes);
aes.IV = rfc2898.GetBytes(KeyStrengthInBytes);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(rawPlaintext, 0, rawPlaintext.Length);
}
cipherText = ms.ToArray();
}
return ByteArrayToString(cipherText);
}
}
public void DecryptsToOriginalPlainText()
{
byte[] plaintextBytes = Encoding.UTF8.GetBytes("This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least. This is a test! It needs to be 128 characters long at least.");
byte[] decryptedBytes;
using (SymmetricAlgorithm algorithm = new AesManaged())
{
byte[] wrongDecryptionKey = algorithm.Key;
algorithm.GenerateKey();
byte[] encryptionKey = algorithm.Key;
Assert.AreNotEqual(encryptionKey, wrongDecryptionKey);
byte[] ciphertextBytes, iv;
using (Encryptor encryptor = algorithm.CreateEncryptor(encryptionKey, out iv))
{
Assert.AreEqual(encryptionKey, encryptor.Algorithm.Key);
Assert.AreEqual(iv, encryptor.Algorithm.IV);
ciphertextBytes = encryptor.Encrypt(plaintextBytes);
}
using (Decryptor decryptor = new Decryptor(algorithm, encryptionKey, iv, Encryption.DefaultOptions))
{
Assert.AreEqual(encryptionKey, decryptor.Algorithm.Key);
Assert.AreEqual(iv, decryptor.Algorithm.IV);
decryptedBytes = decryptor.Decrypt(ciphertextBytes);
}
}
Assert.AreEqual(plaintextBytes, decryptedBytes);
}
internal static void EncryptFile(string inputFile, string outputFile, string password)
{
try {
var UE = new UnicodeEncoding();
byte[] key = UE.GetBytes(password);
string cryptFile = outputFile;
var fsCrypt = new FileStream(cryptFile, FileMode.Create);
var AesMngd = new AesManaged();
var cs = new CryptoStream(fsCrypt,
AesMngd.CreateEncryptor(key, key),
CryptoStreamMode.Write);
using (var fsIn = new FileStream(inputFile, FileMode.Open)) {
int data;
while ((data = fsIn.ReadByte()) != -1)
cs.WriteByte((byte)data);
}
cs.Close();
fsCrypt.Close();
} catch {
Shared.MSGBOX(Shared.GetRes("#D.02#","Error"),"Encryption failed!",System.Windows.Application.Current.MainWindow);
}
}
public string Encrypt(byte[] key, string dataToEncrypt)
{
// Initialize
AesManaged encryptor = new AesManaged();
// Set the key
encryptor.Key = key;
encryptor.IV = key;
// create a memory stream
using (MemoryStream encryptionStream = new MemoryStream())
{
// Create the crypto stream
using (
CryptoStream encrypt = new CryptoStream(encryptionStream, encryptor.CreateEncryptor(),
CryptoStreamMode.Write))
{
// Encrypt
byte[] utfD1 = UTF8Encoding.UTF8.GetBytes(dataToEncrypt);
encrypt.Write(utfD1, 0, utfD1.Length);
encrypt.FlushFinalBlock();
encrypt.Close();
// Return the encrypted data
return Convert.ToBase64String(encryptionStream.ToArray());
}
}
}
public byte[] EncryptAES(ParametroEntreda Entrada)
{
if (Entrada.plainText == null || Entrada.plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Entrada.Key == null || Entrada.Key.Length <= 0)
throw new ArgumentNullException("Key");
if (Entrada.IV == null || Entrada.IV.Length <= 0)
throw new ArgumentNullException("Key");
byte[] encrypted;
using (AesManaged aesAlg = new AesManaged())
{
aesAlg.Key = Entrada.Key;
aesAlg.IV = Entrada.IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(Entrada.plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
return encrypted;
}
public static string Encrypt(string key, string text)
{
// Our symmetric encryption algorithm
AesManaged aes = new AesManaged();
// We're using the PBKDF2 standard for password-based key generation
Rfc2898DeriveBytes rfc = new Rfc2898DeriveBytes("password", Encoding.UTF8.GetBytes(key));
// Setting our parameters
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);
// Encryption
ICryptoTransform encryptTransf = aes.CreateEncryptor();
// Output stream, can be also a FileStream
MemoryStream encryptStream = new MemoryStream();
CryptoStream encryptor = new CryptoStream(encryptStream, encryptTransf, CryptoStreamMode.Write);
byte[] utfData = Encoding.Unicode.GetBytes(text);
encryptor.Write(utfData, 0, utfData.Length);
encryptor.Flush();
encryptor.Close();
// return encrypted content
return Convert.ToBase64String(encryptStream.ToArray());
}
public static string Encrypt(string plainText, string key)
{
if(string.IsNullOrEmpty(plainText)) {
throw new ArgumentNullException("plainText");
}
if(string.IsNullOrEmpty(key)) {
throw new ArgumentNullException("key");
}
using(var keyDerivationFunction = new Rfc2898DeriveBytes(key, SALT_SIZE)) {
byte[] saltBytes = keyDerivationFunction.Salt;
byte[] keyBytes = keyDerivationFunction.GetBytes(32);
byte[] ivBytes = keyDerivationFunction.GetBytes(16);
using(var aesManaged = new AesManaged()) {
aesManaged.KeySize = 256;
using(var encryptor = aesManaged.CreateEncryptor(keyBytes, ivBytes)) {
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
return WriteMemoryStream(plainText, ref saltBytes, encryptor, ref memoryStream, ref cryptoStream);
}
}
}
}
public static string EncryptText(string textToEncrypt, string key, string salt)
{
if (string.IsNullOrWhiteSpace(textToEncrypt)) return null;
if (string.IsNullOrWhiteSpace(key)) return null;
if (string.IsNullOrWhiteSpace(salt)) return null;
using (MemoryStream ms = new MemoryStream())
{
try
{
using (AesManaged aes = new AesManaged())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(key, Encoding.UTF8.GetBytes(salt));
aes.Key = deriveBytes.GetBytes(128 / 8);
ms.Write(BitConverter.GetBytes(aes.IV.Length), 0, sizeof(int));
ms.Write(aes.IV, 0, aes.IV.Length);
using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] bytesFromText = Encoding.Unicode.GetBytes(textToEncrypt);
cs.Write(bytesFromText, 0, bytesFromText.Length);
cs.FlushFinalBlock();
}
return BytesToBase64String(ms.ToArray());// Return the encrypted bytes from the memory stream and convert to Base64
}
}
catch
{
return null;
}
}
}
//平文から暗号化バイト配列を生成して返す
static byte[] EncryptStringToBytes_Aes(string str,string password)
{
if (string.IsNullOrEmpty(str))
throw new ArgumentNullException("plainText");
if (password == null || password.Length <= 0)
throw new ArgumentNullException("key");
byte[] encrypted;
using (AesManaged aesAlg = new AesManaged())
{
byte[] key, iv;
GenerateKeyFromPassword(password, aesAlg.KeySize, out key, aesAlg.BlockSize, out iv);
aesAlg.Key = key;
aesAlg.IV = iv;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(str);
}
encrypted = msEncrypt.ToArray();
}
}
}
return encrypted;
}
public static void EncryptFile(string inputFile, string outputFile, string skey)
{
try
{
using (Aes aes = new AesManaged())
{
var key = new Rfc2898DeriveBytes(skey, salt);
aes.Key = key.GetBytes(aes.KeySize / 8);
aes.IV = key.GetBytes(aes.BlockSize / 8);
using (FileStream fsCrypt = new FileStream(outputFile, FileMode.Create))
{
using (ICryptoTransform encryptor = aes.CreateEncryptor())
{
using (CryptoStream cs = new CryptoStream(fsCrypt, encryptor, CryptoStreamMode.Write))
{
using (FileStream fsIn = new FileStream(inputFile, FileMode.Open))
{
int data;
while ((data = fsIn.ReadByte()) != -1)
{
cs.WriteByte((byte)data);
}
}
}
}
}
}
}
catch { throw; }
}
/// <summary>
/// <see cref="IAesManagedWrapper.Encrypt"/>
/// </summary>
public byte[] Encrypt(byte[] bytesToBeEncrypted, byte[] aesKey, out byte[] aesIv)
{
byte[] encryptedBytes;
using (var ms = new MemoryStream())
{
using (var aes = new AesManaged())
{
SetStandardConfiguration(aes);
aes.Key = aesKey;
aes.GenerateIV();
aesIv = aes.IV;
using (var cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
cs.Close();
}
encryptedBytes = ms.ToArray();
}
}
return encryptedBytes;
}
public static byte[] Encrypt(string text, string password, byte[] salt = null)
{
if (string.IsNullOrEmpty(text)) throw new ArgumentNullException("text");
if (string.IsNullOrEmpty(password)) throw new ArgumentNullException("password");
if (salt == null) salt = DefaultSalt;
var aes = new AesManaged();
byte[] encryptedData;
try
{
aes.SetKey(password, salt);
var encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
using (var ms = new MemoryStream())
{
ms.Write(BitConverter.GetBytes(aes.IV.Length), 0, sizeof(int));
ms.Write(aes.IV, 0, aes.IV.Length);
using (var cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
using (var sw = new StreamWriter(cs))
sw.Write(text);
encryptedData = ms.ToArray();
}
}
finally
{
aes.Clear();
}
return encryptedData;
}
static byte[] EncryptedStringToBytes_Aes(string plainText, byte[] key, byte[] IV)
{
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (key == null || key.Length <= 0)
throw new ArgumentNullException("key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("SAL");
byte[] encrypted;
using (AesManaged aesAlg = new AesManaged())
{
aesAlg.Key = key;
aesAlg.IV = IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
return encrypted;
}
public BlockConsensusRequest CreateRequest(MinerWallet wallet)
{
lock (SyncRoot)
{
if (!Valid) throw new InvalidOperationException();
if (request == null)
{
request = new BlockConsensusRequest
{
PrevHash = PrevHash,
Miner = my_pubkey,
NonceHash = NonceHashes[my_pubkey],
TransactionHashes = TransactionHashes.ToArray()
};
SplitSecret secret = SecretSharing.Split(Nonces[my_pubkey].ToArray(), (Miners.Length - 1) / 2 + 1);
for (int i = 0; i < Miners.Length; i++)
{
if (Miners[i].Equals(my_pubkey)) continue;
byte[] aeskey = wallet.GetAesKey(Miners[i]);
byte[] iv = aeskey.Take(16).ToArray();
byte[] piece = secret.GetShare(i + 1).ToArray();
using (AesManaged aes = new AesManaged())
using (ICryptoTransform encryptor = aes.CreateEncryptor(aeskey, iv))
{
piece = encryptor.TransformFinalBlock(piece, 0, piece.Length);
}
Array.Clear(aeskey, 0, aeskey.Length);
Array.Clear(iv, 0, iv.Length);
request.NoncePieces.Add(Miners[i], piece);
}
}
return request;
}
}
/// <summary>
/// Encrypt a string using AES
/// </summary>
/// <param name="Str">String to encrypt</param>
/// <param name="Password">Encryption password</param>
/// <param name="Salt">A salt string (at least 8 bytes)</param>
/// <returns>Encrypted string in case of success; otherwise - empty string</returns>
public static string EncryptString(string Str, string Password = "******", string Salt = "tdcm1234")
{
try
{
using (Aes aes = new AesManaged())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(Password, Encoding.UTF8.GetBytes(Salt));
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
using (MemoryStream encryptionStream = new MemoryStream())
{
using (CryptoStream encrypt = new CryptoStream(encryptionStream, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] utfD1 = UTF8Encoding.UTF8.GetBytes(Str);
encrypt.Write(utfD1, 0, utfD1.Length);
encrypt.FlushFinalBlock();
}
return Convert.ToBase64String(encryptionStream.ToArray());
}
}
}
catch (Exception ex)
{
Debug.WriteLine("Error : AES ~ EncryptString ; " + ex.Message);
return "";
}
}
public static byte[] Encrypt(byte[] input)
{
if (_key == null || _key.Length == 0) throw new Exception("Key can not be empty.");
if (input == null || input.Length == 0) throw new ArgumentException("Input can not be empty.");
byte[] data = input, encdata = new byte[0];
try
{
using (var ms = new MemoryStream())
{
using (var rd = new AesManaged { Key = _key })
{
rd.GenerateIV();
using (var cs = new CryptoStream(ms, rd.CreateEncryptor(), CryptoStreamMode.Write))
{
ms.Write(rd.IV, 0, rd.IV.Length); // write first 16 bytes IV, followed by encrypted message
cs.Write(data, 0, data.Length);
}
}
encdata = ms.ToArray();
}
}
catch
{
}
return encdata;
}
internal static byte[] Encrypt(byte[] data)
{
byte[] output = null;
using (var aes = new AesManaged())
{
using (var encryptor = aes.CreateEncryptor(Configuration.Default.EncryptionKey, Configuration.Default.EncryptionIV))
{
using (var dataStream = new MemoryStream())
{
using (var encryptionStream = new CryptoStream(dataStream, encryptor, CryptoStreamMode.Write))
{
encryptionStream.Write(data, 0, data.Length);
encryptionStream.FlushFinalBlock();
dataStream.Position = 0;
byte[] transformedBytes = new byte[dataStream.Length];
dataStream.Read(transformedBytes, 0, transformedBytes.Length);
encryptionStream.Close();
dataStream.Close();
output = transformedBytes;
}
}
}
}
return output;
}
/// <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);
}
// should be used to encrypt a key with another key
public static string EncryptWithKey(this string plaintext, string hexkey, string iv)
{
byte[] key = hexkey.ToByteArray ();
byte[] byte_iv = iv.ToByteArray ();
var aes = new AesManaged ();
if (key.Length != 16 && key.Length != 20 && key.Length != 32)
throw new Exception ("Key must be 128, 192 or 256 bits");
ICryptoTransform encryptor = aes.CreateEncryptor (key, byte_iv);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plaintext);
}
var encrypted = msEncrypt.ToArray();
return encrypted.ToHexString ();
}
}
}
public byte[] Encrypt(string plainText, byte[] Key, byte[] IV)
{
byte[] encrypted;
// Create a new AesManaged.
using (System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged())
{
// Create encryptor
System.Security.Cryptography.ICryptoTransform encryptor = aes.CreateEncryptor(Key, IV);
// Create MemoryStream
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
// Create crypto stream using the CryptoStream class. This class is the key to encryption
// and encrypts and decrypts data from any given stream. In this case, we will pass a memory stream
// to encrypt
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
// Create StreamWriter and write data to a stream
using (System.IO.StreamWriter sw = new System.IO.StreamWriter(cs))
sw.Write(plainText);
encrypted = ms.ToArray();
}
}
}
// Return encrypted data
return(encrypted);
}
///<summary>Encrypts signature text and returns a base 64 string so that it can go directly into the database.</summary>
public static string Encrypt(string str,byte[] key){
//No need to check RemotingRole; no call to db.
if(str==""){
return "";
}
byte[] ecryptBytes=Encoding.UTF8.GetBytes(str);
MemoryStream ms=new MemoryStream();
CryptoStream cs=null;
Aes aes=new AesManaged();
aes.Key=key;
aes.IV=new byte[16];
ICryptoTransform encryptor=aes.CreateEncryptor(aes.Key,aes.IV);
cs=new CryptoStream(ms,encryptor,CryptoStreamMode.Write);
cs.Write(ecryptBytes,0,ecryptBytes.Length);
cs.FlushFinalBlock();
byte[] encryptedBytes=new byte[ms.Length];
ms.Position=0;
ms.Read(encryptedBytes,0,(int)ms.Length);
cs.Dispose();
ms.Dispose();
if(aes!=null) {
aes.Clear();
}
return Convert.ToBase64String(encryptedBytes);
}
public static string Encrypt(this string text, string lKey)
{
try
{
using (Aes aes = new AesManaged())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(Encoding.UTF8.GetString(IVa, 0, IVa.Length), Encoding.UTF8.GetBytes(lKey));
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
using (MemoryStream encryptionStream = new MemoryStream())
{
using (CryptoStream encrypt = new CryptoStream(encryptionStream, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] cleanText = Encoding.UTF8.GetBytes(text);
encrypt.Write(cleanText, 0, cleanText.Length);
encrypt.FlushFinalBlock();
}
byte[] encryptedData = encryptionStream.ToArray();
string encryptedText = Convert.ToBase64String(encryptedData);
return encryptedText;
}
}
}
catch
{
return String.Empty;
}
}
public static string encrypt(string valueToEncrypt)
{
using (Aes aes = new AesManaged())
{
aes.Padding = PaddingMode.PKCS7;
aes.KeySize = 128; // in bits
aes.Key = new byte[128 / 8]; // 16 bytes for 128 bit encryption
aes.IV = new byte[128 / 8]; // AES needs a 16-byte IV
// Should set Key and IV here. Good approach: derive them from
// a password via Cryptography.Rfc2898DeriveBytes
byte[] cipherText = null;
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(UTF8Encoding.UTF8.GetBytes(valueToEncrypt), 0, valueToEncrypt.Length);
}
cipherText = ms.ToArray();
}
return Convert.ToBase64String(cipherText);
}
}
/// <summary>
/// Encrypts the string using the Advanced Encryption Standard (AES) symmetric algorithm.
/// </summary>
/// <param name="plainText">The plain string to be encypted.</param>
/// <param name="key">The secret key to use for the symmetric algorithm.</param>
/// <param name="iv">The initialization vector to use for the symmetric algorithm.</param>
/// <returns>A byte array containing the encypted string.</returns>
public static byte[] EncryptString(string plainText, byte[] key, byte[] iv)
{
// Check arguments.
if (string.IsNullOrEmpty(plainText))
throw new ArgumentNullException("plainText");
if (key == null || key.Length <= 0)
throw new ArgumentNullException("key");
if (iv == null || iv.Length <= 0)
throw new ArgumentNullException("iv");
using (var msEncrypt = new MemoryStream())
using (var aes = new AesManaged())
{
aes.Key = key;
aes.IV = iv;
ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (var swEncrypt = new StreamWriter(csEncrypt))
swEncrypt.Write(plainText);
return msEncrypt.ToArray();
}
}
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;
}
private void CreateCrytoTransform()
{
// Get shared secret
GetSharedSecret(ref key, ref iv);
if (key.Length == 0)
{
return;
}
// Set transform
AesManaged aes = new System.Security.Cryptography.AesManaged();
AesManaged aes_decrypt = new AesManaged();
aes.Key = key;
aes.IV = iv;
aes.Mode = System.Security.Cryptography.CipherMode.CBC;
aes.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
aes.BlockSize = 128;
transform = aes.CreateEncryptor();
aes_decrypt.Key = key;
aes_decrypt.IV = iv;
aes_decrypt.Mode = System.Security.Cryptography.CipherMode.CBC;
aes_decrypt.Padding = System.Security.Cryptography.PaddingMode.None;
aes_decrypt.BlockSize = 128;
decryptTransform = aes_decrypt.CreateDecryptor();
}