public static bool TestAlgorithms(SymmetricAlgorithm encAlgorithm, SymmetricAlgorithm decAlgorithm, int maxLength, int iterations)
{
Random rand = new Random();
for (int i = 0; i < iterations; i++)
{
// Create random data, key, IV, mode
//
byte[] key = new byte[KeySizeBytes[rand.Next(KeySizeBytes.Length)]];
rand.NextBytes(key);
byte[] data = new byte[rand.Next(1, maxLength + 1)];
rand.NextBytes(data);
byte[] IV = new byte[BlockSizeBytes];
rand.NextBytes(IV);
// Encrypt the data
//
byte[] encryptedData;
encAlgorithm.Key = key;
encAlgorithm.IV = IV;
ICryptoTransform transform = encAlgorithm.CreateEncryptor();
encryptedData = transform.TransformFinalBlock(data, 0, data.Length);
// Decrypt the data
//
byte[] decryptedData;
decAlgorithm.Key = key;
decAlgorithm.IV = IV;
transform = decAlgorithm.CreateDecryptor();
decryptedData = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
if (!CompareBytes(data, decryptedData))
{
Console.WriteLine("ERROR - roundtrip encrypt/decrypt failed!\n");
Console.WriteLine("Encryption algorithm: {0}", encAlgorithm.ToString());
Console.WriteLine("Decryption algorithm: {0}", decAlgorithm.ToString());
Console.WriteLine("Original data: {0}", ByteArrayToString(data));
Console.WriteLine("Roundtrip data: {0}", ByteArrayToString(decryptedData));
Console.WriteLine("Key: {0}", ByteArrayToString(key));
Console.WriteLine("IV: {0}", ByteArrayToString(IV));
return false;
}
}
return true;
}
public string EncryptString(string plainText, string password)
{
// first we convert the plain text into a byte array
byte[] plainTextBytes = Encoding.Unicode.GetBytes(plainText);
// use a memory stream to hold the bytes
MemoryStream myStream = new MemoryStream();
// create the key and initialization vector using the password
SymmetricAlgorithm sa = InitCipher();
InitCipherObject(sa, password);
// create the encoder that will write to the memory stream
CryptoStream cryptStream = new CryptoStream(myStream, sa.CreateEncryptor(), CryptoStreamMode.Write);
// we now use the crypto stream to write our byte array to the memory stream
cryptStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptStream.FlushFinalBlock();
// change the encrypted stream to a printable version of our encrypted string
return(Convert.ToBase64String(myStream.ToArray()));
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="inputdata">输入的数据</param>
/// <param name="iv">向量128位(Iv的字符串长度为16)</param>
/// <param name="key">加密密钥(key的长度为32)</param>
/// <returns></returns>
public static byte[] AESEncrypt(string encryptString, string key, string iv)
{
//分组加密算法
SymmetricAlgorithm Aes = Rijndael.Create();
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);//得到需要加密的字节数组
//设置密钥及密钥向量
Aes.Key = Encoding.UTF8.GetBytes(key);
Aes.IV = Encoding.UTF8.GetBytes(iv);;
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, Aes.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
byte[] cipherBytes = ms.ToArray();//得到加密后的字节数组
cs.Close();
ms.Close();
return(cipherBytes);
//return Convert.ToBase64String(cipherBytes); //返回字符串
}
}
}
public static async Task <string> Encrypt(string plainText, byte[] key, byte[] iv)
{
using (SymmetricAlgorithm aes = Rijndael.Create())
{
aes.Key = key;
aes.IV = iv;
using (ICryptoTransform crypto = aes.CreateEncryptor())
{
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(ms, crypto, CryptoStreamMode.Write))
{
var bytes = Encoding.UTF8.GetBytes(plainText);
cryptoStream.Write(bytes, 0, bytes.Length);
await cryptoStream.FlushAsync();
}
var encryptedBytes = ms.ToArray();
return(Convert.ToBase64String(encryptedBytes));
}
}
}
}
static void encrypt()
{
string ans = "green";
string key = "1E14FC86752772F5DB58B99764D0168106D336563D77CCBA";
string salt = "xXsrnq4n1jebmRiC/Ty46g==";
byte[] key_bytes = GetBytes(key, key.Length);
byte[] ans_bytes = Encoding.Unicode.GetBytes(ans);
byte[] salt_bytes = Convert.FromBase64String(salt);
byte[] buf = new byte[ans_bytes.Length + salt_bytes.Length];
/*Array.Copy (salt_bytes, 0, buf, 0, salt_bytes.Length);*/
Array.Copy(ans_bytes, 0, buf, salt_bytes.Length, ans_bytes.Length);
Console.WriteLine("before encryption {0}", Convert.ToBase64String(buf));
SymmetricAlgorithm alg = Rijndael.Create();
ICryptoTransform encryptor = alg.CreateEncryptor(key_bytes, salt_bytes);
Console.WriteLine(Convert.ToBase64String(encryptor.TransformFinalBlock(buf, 0, buf.Length)));
}
private static byte[] Encrypt(SymmetricAlgorithm symmetricAlgorithm, byte[] bytes)
{
if (bytes == null || bytes.Length == 0)
{
Debug.LogError("The byte is null or zero length!");
return(bytes);
}
if (symmetricAlgorithm == null)
{
throw new NullReferenceException();
}
using (var stream = new MemoryStream())
using (var encryptor = symmetricAlgorithm.CreateEncryptor())
using (var encrypt = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))
{
encrypt.Write(bytes, 0, bytes.Length);
encrypt.FlushFinalBlock();
return(stream.ToArray());
}
}
// Return result in base64-encoded form
public static string EncryptBySymmetricAlgorithm(string plainText, SymmetricAlgorithm aesAlgorithm)
{
byte[] encrypted;
// Create an encryptor to perform the stream transform.
var encryptor = aesAlgorithm.CreateEncryptor(aesAlgorithm.Key, aesAlgorithm.IV);
// Create the streams used for encryption.
using (var msEncrypt = new MemoryStream())
{
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
// Return encoded data.
return(Convert.ToBase64String(encrypted));
}
//构造，初始化加密与解密容器，获取向量与密钥,
//无参构造，默认使用TripleDES算法,其提供的key位数更多，加密可靠性更高。
public void DesInit(string algorithmName = "DES") //TripleDES
{
SymmetricAlgorithm provider = SymmetricAlgorithm.Create(algorithmName);
//provider.IV = Convert.FromBase64String(IV);
switch (algorithmName)
{
case "DES":
provider.Key = Encoding.UTF8.GetBytes(DesKey);
break;
case "TripleDES":
provider.Key = Encoding.UTF8.GetBytes(TripleDesKey);
break;
default:
throw new Exception("选择不正确,DES||TripleDES");
}
//密钥和初始向量
provider.IV = new byte[] { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
encryptor = provider.CreateEncryptor();
decryptor = provider.CreateDecryptor();
}
public static string Encrypt(this string clearMessage, string key, string vector)
{
byte[] message = Encoding.Default.GetBytes(clearMessage);
string cipher = string.Empty;
SymmetricAlgorithm des3 = SymmetricAlgorithm.Create("3DES");
des3.Key = Encoding.Default.GetBytes(key);
des3.IV = Encoding.Default.GetBytes(vector);
using (MemoryStream mstream = new MemoryStream())
{
using (CryptoStream cstream = new CryptoStream(mstream, des3.CreateEncryptor(), CryptoStreamMode.Write))
{
cstream.Write(message, 0, message.Length);
}
byte[] cryptostream = mstream.ToArray();
cipher = Convert.ToBase64String(cryptostream);
}
return(cipher);
}
public override bool Encrypt(NetOutgoingMessage msg)
{
int unEncLenBits = msg.LengthBits;
var ms = new MemoryStream();
var cs = new CryptoStream(ms, m_algorithm.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(msg.m_data, 0, msg.LengthBytes);
cs.Close();
// get results
var arr = ms.ToArray();
ms.Close();
msg.EnsureBufferSize((arr.Length + 4) * 8);
msg.LengthBits = 0; // reset write pointer
msg.Write((uint)unEncLenBits);
msg.WriteRaw(arr);
msg.LengthBits = (arr.Length + 4) * 8;
return(true);
}
/// <summary>
/// AES加密算法
/// </summary>
/// <param name="plainText">明文字符串</param>
/// <param name="strKey">密钥</param>
/// <returns>返回加密后的密文字节数组</returns>
public string AESEncrypt(string plainText, string strKey)
{
//分组加密算法
SymmetricAlgorithm des = Rijndael.Create();
byte[] inputByteArray = Encoding.UTF8.GetBytes(plainText);//得到需要加密的字节数组
des.Mode = CipherMode.ECB;
des.Padding = PaddingMode.PKCS7;
//设置密钥及密钥向量
des.Key = Encoding.UTF8.GetBytes(strKey);
des.IV = _key1;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
byte[] cipherBytes = ms.ToArray();//得到加密后的字节数组
cs.Close();
ms.Close();
//BitConverter.ToString(cipherBytes).Replace("-", "").ToLower()
return(BitConverter.ToString(cipherBytes).Replace("-", "").ToLower());
}
public string encryptData(string rawData)
{
SymmetricAlgorithm sym = SymmetricAlgorithm.Create("rijndael");
sym.Key = readKey();
sym.Key = readKey();
byte[] clearData = Encoding.UTF8.GetBytes(rawData);
MemoryStream mem = new MemoryStream();
sym.GenerateIV();
mem.Write(sym.IV, 0, sym.IV.Length);
CryptoStream cs = new CryptoStream(mem, sym.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(clearData, 0, clearData.Length);
cs.FlushFinalBlock();
cs.Close();
string creptedata = Convert.ToBase64String(mem.ToArray());
mem.Close();
return(creptedata);
}
private static byte[] Encrypt(byte[] key, string value)
{
SymmetricAlgorithm Sa = Rijndael.Create();
ICryptoTransform Ct = Sa.CreateEncryptor((new PasswordDeriveBytes(value, null)).GetBytes(16), new byte[16]);
MemoryStream Ms = new MemoryStream();
CryptoStream Cs = new CryptoStream(Ms, Ct, CryptoStreamMode.Write);
Cs.Write(key, 0, key.Length);
Cs.FlushFinalBlock();
byte[] Result = Ms.ToArray();
Ms.Close();
Ms.Dispose();
Cs.Close();
Cs.Dispose();
Ct.Dispose();
return(Result);
}
public static string encrypt(string encryptionString, string Key, string IV)
{
byte[] clearTextBytes = Encoding.UTF8.GetBytes(encryptionString);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.Mode = CipherMode.ECB;
rijn.Padding = PaddingMode.Zeros;
rijn.BlockSize = 256;
MemoryStream ms = new MemoryStream();
byte[] rgbIV = Encoding.ASCII.GetBytes(IV);
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();
return(Convert.ToBase64String(ms.ToArray()));
}
public byte[] EncodeData(byte[] text, byte[] sharedKey)
{
using (SymmetricAlgorithm algorithm = SymmetricAlgorithm.Create("Rijndael"))
{
algorithm.GenerateIV();
algorithm.GenerateKey();
//algorithm.Padding = PaddingMode.Zeros;
//algorithm.Mode = CipherMode.CBC;
var key = new byte[algorithm.Key.Length];
var iv = new byte[algorithm.IV.Length];
Array.Copy(sharedKey, 0, key, 0, key.Length);
Array.Copy(sharedKey, key.Length, iv, 0, iv.Length);
BlockChainService.WriteLogByteArray("Crypte:Encode:key", key);
BlockChainService.WriteLogByteArray("Crypte:Encode:iv", iv);
using (var cryptoTransform = algorithm.CreateEncryptor(key, iv))
{
return(Transform(text, cryptoTransform));
}
}
}
/// <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);
using (CryptoStream cs = new CryptoStream(ms, rijn.CreateEncryptor(key, rgbIV), CryptoStreamMode.Write)) {
cs.Write(clearTextBytes, 0, clearTextBytes.Length);
cs.FlushFinalBlock();
returnValue = Convert.ToBase64String(ms.ToArray());
}
}
} catch (Exception ex) {
LOG.ErrorFormat("Error encrypting, error: {0}", ex.Message);
}
return(returnValue);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="Value"></param>
/// <param name="p_strKey">密钥</param>
/// <param name="p_strIV">干扰码</param>
/// <returns></returns>
public string EncryptString(string Value, string p_strKey, string p_strIV)
{
ICryptoTransform ct;
System.IO.MemoryStream ms;
CryptoStream cs;
byte[] byt;
//ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV);
ct = mCSP.CreateEncryptor(Convert.FromBase64String(p_strKey.Trim()), Convert.FromBase64String(p_strIV.Trim()));
byt = System.Text.Encoding.UTF8.GetBytes(Value);
ms = new System.IO.MemoryStream();
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
cs.Write(byt, 0, byt.Length);
cs.FlushFinalBlock();
cs.Close();
return(Convert.ToBase64String(ms.ToArray()));
}
public static byte[] AESEncrypt(this string text)
{
byte[] data = Encoding.Unicode.GetBytes(text);
SymmetricAlgorithm aes = Rijndael.Create();
aes.Key = keyArray;
aes.IV = ivArray;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.Zeros;
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(data, 0, data.Length);
cs.FlushFinalBlock();
byte[] cipherBytes = ms.ToArray(); // 得到加密后的字节数组
cs.Close();
ms.Close();
aes.Clear();
return(cipherBytes);
}
}
}
private static byte[] EncryptBytes(
SymmetricAlgorithm alg,
byte[] message)
{
if ((message == null) || (message.Length == 0))
{
return(message);
}
if (alg == null)
{
throw new ArgumentNullException("alg");
}
using (var stream = new MemoryStream())
using (var encryptor = alg.CreateEncryptor())
using (var encrypt = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))
{
encrypt.Write(message, 0, message.Length);
encrypt.FlushFinalBlock();
return(stream.ToArray());
}
}
/// <summary>
/// AES加密算法
/// </summary>
/// <param name="plainText">明文字符串</param>
/// <returns>将加密后的密文转换为Base64编码，以便显示</returns>
public static string AESEncrypt(string plainText)
{
//分组加密算法
SymmetricAlgorithm des = Rijndael.Create();
byte[] inputByteArray = Encoding.UTF8.GetBytes(plainText);//得到需要加密的字节数组
//设置密钥及密钥向量
des.Key = Encoding.UTF8.GetBytes(Key);
des.IV = _key1;
byte[] cipherBytes = null;
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cipherBytes = ms.ToArray();//得到加密后的字节数组
cs.Close();
ms.Close();
}
}
return(Convert.ToBase64String(cipherBytes));
}
/// <summary>
/// 对称加密
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public string SymmetricEncrpyt(string str)
{
Guard.NotNullOrEmpty(str, "str");
SymmetricAlgorithm cryptoObj = GetSymmetricAlgorithm(this.symmetricAlgorithmType);
byte[] bytIn = UTF8Encoding.UTF8.GetBytes(str);
using (MemoryStream ms = new MemoryStream())
{
cryptoObj.Key = GetLegalKey(cryptoObj);
cryptoObj.IV = GetLegalIV(cryptoObj);
ICryptoTransform encrypto = cryptoObj.CreateEncryptor();
using (CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write))
{
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
ms.Close();
byte[] bytOut = ms.ToArray();
return(Convert.ToBase64String(bytOut));
}
}
}
/// <summary>
/// AES encoder
/// </summary>
/// <param name="str">string you want to encode.</param>
/// <returns>encode string with Base64.</returns>
public static string EncodeAES(string str)
{
try {
SymmetricAlgorithm des = Rijndael.Create();
byte[] inputBytes = Encoding.UTF8.GetBytes(str);
des.Key = Encoding.UTF8.GetBytes(_aes_key);
des.IV = _aes_IV;
byte[] cipherBytes = null;
using (MemoryStream ms = new MemoryStream()) {
using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write)) {
cs.Write(inputBytes, 0, inputBytes.Length);
cs.FlushFinalBlock();
cipherBytes = ms.ToArray(); //get byte array
cs.Close();
ms.Close();
}
}
return(Convert.ToBase64String(cipherBytes));
} catch (Exception e) {
XLAFInnerLog.Error(e.ToString());
}
return("");
}
public override DecryptResponse Query(DecryptRequest request, IServiceRouter router, RequestContext context)
{
DecryptResponse response = new DecryptResponse();
using (SymmetricAlgorithm alg = SymmetricAlgorithm.Create(request.Algorithm))
{
alg.IV = request.IV;
alg.Key = request.Key;
using (ICryptoTransform transform = alg.CreateEncryptor())
{
using (MemoryStream memoryStream = new MemoryStream())
{
memoryStream.Write(request.CipherText, 0, request.CipherText.Length);
memoryStream.Flush();
List <byte> bytes = new List <byte>();
using (CryptoStream stream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Read))
{
int readByte;
while ((readByte = stream.ReadByte()) >= 0)
{
bytes.Add((byte)readByte);
}
}
response.ClearText = bytes.ToArray();
}
}
}
return(response);
}
public string Encrypting(string Source, string Key)
{
byte[] bytIn = System.Text.ASCIIEncoding.ASCII.GetBytes(Source);
// create a MemoryStream so that the process can be done without I/O files
System.IO.MemoryStream ms = new System.IO.MemoryStream();
byte[] bytKey = GetLegalKey(Key);
// set the private key
mobjCryptoService.Key = bytKey;
mobjCryptoService.IV = bytKey;
// create an Encryptor from the Provider Service instance
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
// create Crypto Stream that transforms a stream using the encryption
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
// write out encrypted content into MemoryStream
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
// get the output and trim the '\0' bytes
byte[] bytOut = ms.GetBuffer();
int i = 0;
for (i = 0; i < bytOut.Length; i++)
{
if (bytOut[i] == 0)
{
break;
}
}
// convert into Base64 so that the result can be used in xml
return(System.Convert.ToBase64String(bytOut, 0, i));
}
/// <summary>
/// Encrypts a byte array
/// </summary>
/// <param name="Data">Data to encrypt</param>
/// <param name="Key">Key to use to encrypt the data (can use PasswordDeriveBytes, Rfc2898DeriveBytes, etc. Really anything that implements DeriveBytes)</param>
/// <param name="AlgorithmUsing">Algorithm to use for encryption (defaults to AES)</param>
/// <param name="InitialVector">Needs to be 16 ASCII characters long</param>
/// <param name="KeySize">Can be 64 (DES only), 128 (AES), 192 (AES and Triple DES), or 256 (AES)</param>
/// <returns>An encrypted byte array</returns>
public static byte[] Encrypt(this byte[] Data,
DeriveBytes Key,
SymmetricAlgorithm AlgorithmUsing = null,
string InitialVector = "OFRna73m*aze01xY",
int KeySize = 256)
{
if (Data.IsNull())
{
return(null);
}
AlgorithmUsing = AlgorithmUsing.NullCheck(new RijndaelManaged());
InitialVector.ThrowIfNullOrEmpty("InitialVector");
using (DeriveBytes DerivedPassword = Key)
{
using (SymmetricAlgorithm SymmetricKey = AlgorithmUsing)
{
SymmetricKey.Mode = CipherMode.CBC;
byte[] CipherTextBytes = null;
using (ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(DerivedPassword.GetBytes(KeySize / 8), InitialVector.ToByteArray()))
{
using (MemoryStream MemStream = new MemoryStream())
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write))
{
CryptoStream.Write(Data, 0, Data.Length);
CryptoStream.FlushFinalBlock();
CipherTextBytes = MemStream.ToArray();
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return(CipherTextBytes);
}
}
}
private void CodeButton_Click(object sender, EventArgs e)
{
// cipher
SymmetricAlgorithm sa = TripleDES.Create();
sa.GenerateKey();
key = sa.Key;
sa.Mode = CipherMode.ECB;
sa.Padding = PaddingMode.PKCS7;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, sa.CreateEncryptor(), CryptoStreamMode.Write);
byte[] plainbytes = Encoding.Default.GetBytes(plainTextBox.Text);
cs.Write(plainbytes, 0, plainbytes.Length);
cs.Close();
cipherbytes = ms.ToArray();
ms.Close();
// show ciphered text
str = Encoding.Default.GetString(cipherbytes);
cipherTextBox.Text = str;
// decipher
te = new byte[str.Length];
te = Encoding.Default.GetBytes(str);
SymmetricAlgorithm sa2 = TripleDES.Create();
sa2.Key = key;
sa2.Mode = CipherMode.ECB;
sa2.Padding = PaddingMode.PKCS7;
MemoryStream ms2 = new MemoryStream(te);
CryptoStream cs2 = new CryptoStream(ms2, sa2.CreateDecryptor(), CryptoStreamMode.Read);
byte[] plainbytes2 = new byte[te.Length];
cs2.Read(plainbytes2, 0, te.Length);
cs2.Close();
ms2.Close();
textBox.Text = Encoding.Default.GetString(plainbytes2);
}
public static byte[] EncryptData(SymmetricAlgorithms symmetricAlgorithm, byte[] inputBytes, byte[] key)
{
byte[] result;
using (SymmetricAlgorithm algorithm = GetSymmetricAlgorithm(symmetricAlgorithm))
{
byte[] encrypted;
byte[] salt = new byte[PBKDF2_SaltSizeBytes];
int maxKeySize = GetLegalKeySizes(algorithm).Max();
_rng.GetBytes(salt);
using (Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(key, salt, PBKDF2_Iterations))
{
algorithm.Key = pbkdf2.GetBytes(maxKeySize);
}
using (ICryptoTransform cryptoTransform = algorithm.CreateEncryptor())
{
using (MemoryStream inputStream = new MemoryStream(inputBytes), transformedStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(inputStream, cryptoTransform, CryptoStreamMode.Read))
{
cryptoStream.CopyTo(transformedStream);
}
encrypted = transformedStream.ToArray();
}
}
result = new byte[salt.Length + algorithm.IV.Length + encrypted.Length];
Buffer.BlockCopy(salt, 0, result, 0, salt.Length);
Buffer.BlockCopy(algorithm.IV, 0, result, salt.Length, algorithm.IV.Length);
Buffer.BlockCopy(encrypted, 0, result, salt.Length + algorithm.IV.Length, encrypted.Length);
}
return(result);
}
private static Stream CreateStream(Stream s, bool bEncrypt, byte[] pbKey, byte[] pbIV)
{
StandardAesEngine.ValidateArguments(s, bEncrypt, pbKey, pbIV);
byte[] pbLocalIV = new byte[16];
Array.Copy(pbIV, pbLocalIV, 16);
byte[] pbLocalKey = new byte[32];
Array.Copy(pbKey, pbLocalKey, 32);
#if KeePassUAP
return(StandardAesEngineExt.CreateStream(s, bEncrypt, pbLocalKey, pbLocalIV));
#else
SymmetricAlgorithm a = CryptoUtil.CreateAes();
if (a.BlockSize != 128) // AES block size
{
Debug.Assert(false);
a.BlockSize = 128;
}
a.IV = pbLocalIV;
a.KeySize = 256;
a.Key = pbLocalKey;
a.Mode = m_rCipherMode;
a.Padding = m_rCipherPadding;
ICryptoTransform iTransform = (bEncrypt ? a.CreateEncryptor() : a.CreateDecryptor());
Debug.Assert(iTransform != null);
if (iTransform == null)
{
throw new SecurityException("Unable to create AES transform!");
}
return(new CryptoStream(s, iTransform, bEncrypt ? CryptoStreamMode.Write :
CryptoStreamMode.Read));
#endif
}
private byte[] Encrypt(byte[] byteData)
{
MemoryStream memoryStream = new MemoryStream();
SymmetricAlgorithm symmetricAlgorithm = DES.Create();
symmetricAlgorithm.Key = new byte[]
{
115,
17,
147,
32,
91,
245,
111,
7
};
symmetricAlgorithm.IV = new byte[]
{
14,
177,
19,
167,
154,
220,
12,
15
};
byte[] result;
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, symmetricAlgorithm.CreateEncryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(byteData, 0, byteData.Length);
cryptoStream.Close();
byte[] array = memoryStream.ToArray();
result = array;
}
return(result);
}
static byte[] Encrypt(string PlainText, SymmetricAlgorithm key)
{
try
{
// Create a memory stream.
MemoryStream ms = new MemoryStream();
// Create a CryptoStream using the memory stream and the
// CSP DES key.
CryptoStream encStream = new CryptoStream(ms, key.CreateEncryptor(), CryptoStreamMode.Write);
// Create a StreamWriter to write a string
// to the stream.
StreamWriter sw = new StreamWriter(encStream);
// Write the plaintext to the stream.
sw.WriteLine(PlainText);
// Close the StreamWriter and CryptoStream.
sw.Close();
encStream.Close();
// Get an array of bytes that represents
// the memory stream.
byte[] buffer = ms.ToArray();
// Close the memory stream.
ms.Close();
// Return the encrypted byte array.
return(buffer);
}
catch
{
return(null);
}
}
public static Stream GetEncryptedStream(Stream inStream, SymmetricAlgorithm provider)
{
if (inStream == null)
{
throw new ArgumentNullException("Invalid stream.", "inStream");
}
if (provider == null)
{
throw new ArgumentNullException("Invalid provider.", "provider");
}
Stream compStream = CompressStream(inStream);
MemoryStream outStream = new MemoryStream();
CryptoStream encryptStream = new CryptoStream(outStream, provider.CreateEncryptor(), CryptoStreamMode.Write);
// Read the in stream in 1024 byte chunks
byte[] buffer = new byte[1024];
int bytesRead = 0;
do
{
bytesRead = compStream.Read(buffer, 0, 1024);
if (bytesRead > 0)
{
encryptStream.Write(buffer, 0, bytesRead);
}
}while (bytesRead > 0);
encryptStream.FlushFinalBlock();
outStream.Position = 0;
return(outStream);
}
public CounterModeCryptoTransform(SymmetricAlgorithm symmetricAlgorithm, byte[] key, byte[] counter)
{
if (symmetricAlgorithm == null) throw new ArgumentNullException("symmetricAlgorithm");
if (key == null) throw new ArgumentNullException("key");
if (counter == null) throw new ArgumentNullException("counter");
if (counter.Length != symmetricAlgorithm.BlockSize / 8)
throw new ArgumentException(String.Format("Counter size must be same as block size (actual: {0}, expected: {1})",
counter.Length, symmetricAlgorithm.BlockSize / 8));
_symmetricAlgorithm = symmetricAlgorithm;
_counter = counter;
var zeroIv = new byte[_symmetricAlgorithm.BlockSize / 8];
_counterEncryptor = symmetricAlgorithm.CreateEncryptor(key, zeroIv);
}
static bool Test(SymmetricAlgorithm cipher, byte[] key, byte[] iv, byte[] input, byte[] expected)
{
cipher.Mode = CipherMode.ECB;
cipher.KeySize = key.Length * 8;
cipher.Padding = PaddingMode.Zeros;
byte[] output = new byte [input.Length];
ICryptoTransform encryptor = cipher.CreateEncryptor (key, iv);
encryptor.TransformBlock (input, 0, input.Length, output, 0);
if (!Compare (output, expected))
return false;
byte[] original = new byte [output.Length];
ICryptoTransform decryptor = cipher.CreateDecryptor (key, iv);
decryptor.TransformBlock (output, 0, output.Length, original, 0);
return Compare (original, input);
}
// Perform a primitive ECB encryption on a block.
private void ECBBlock(byte[] buf, int index,
SymmetricAlgorithm alg, byte[] key)
{
ICryptoTransform encryptor;
CipherMode mode = alg.Mode;
PaddingMode padding = alg.Padding;
alg.Mode = CipherMode.ECB;
alg.Padding = PaddingMode.None;
encryptor = alg.CreateEncryptor(key, null);
alg.Mode = mode;
alg.Padding = padding;
encryptor.TransformBlock(buf, index, alg.BlockSize / 8,
buf, index);
encryptor.Dispose();
}
// Run a cipher mode test.
private void RunModeTest(SymmetricAlgorithm alg, CipherMode mode,
PaddingMode padding, String input)
{
// Set the algorithm modes.
alg.Mode = mode;
alg.Padding = padding;
// Get the raw and padded versions of the input.
byte[] rawInput = Encoding.ASCII.GetBytes(input);
byte[] paddedInput = StringToBytes(input, alg);
// Generate key and IV values.
byte[] key = CreateKey(alg);
byte[] iv = CreateIV(alg);
// Encrypt the raw input in the selected mode.
int size = alg.BlockSize / 8;
int cutoff = rawInput.Length - rawInput.Length % size;
ICryptoTransform encryptor;
encryptor = alg.CreateEncryptor(key, iv);
Assert(GetError("encryptor cannot transform multiple blocks",
alg, input),
encryptor.CanTransformMultipleBlocks);
if(mode == CipherMode.ECB || mode == CipherMode.CBC)
{
AssertEquals(GetError("encryptor has wrong input size",
alg, input),
size, encryptor.InputBlockSize);
AssertEquals(GetError("encryptor has wrong output size",
alg, input),
size, encryptor.OutputBlockSize);
}
else
{
AssertEquals(GetError("encryptor has wrong input size",
alg, input),
1, encryptor.InputBlockSize);
AssertEquals(GetError("encryptor has wrong output size",
alg, input),
1, encryptor.OutputBlockSize);
}
byte[] rawOutput = new byte [rawInput.Length + 256];
int len = encryptor.TransformBlock
(rawInput, 0, cutoff, rawOutput, 0);
byte[] rawTail = encryptor.TransformFinalBlock
(rawInput, cutoff, rawInput.Length - cutoff);
Array.Copy(rawTail, 0, rawOutput, len, rawTail.Length);
len += rawTail.Length;
((IDisposable)encryptor).Dispose();
// Reverse the ciphertext back to the original.
cutoff = len - len % size;
ICryptoTransform decryptor;
decryptor = alg.CreateDecryptor(key, iv);
Assert(GetError("decryptor cannot transform multiple blocks",
alg, input),
decryptor.CanTransformMultipleBlocks);
if(mode == CipherMode.ECB || mode == CipherMode.CBC)
{
AssertEquals(GetError("decryptor has wrong input size",
alg, input),
size, decryptor.InputBlockSize);
AssertEquals(GetError("decryptor has wrong output size",
alg, input),
size, decryptor.OutputBlockSize);
}
else
{
AssertEquals(GetError("decryptor has wrong input size",
alg, input),
1, decryptor.InputBlockSize);
AssertEquals(GetError("decryptor has wrong output size",
alg, input),
1, decryptor.OutputBlockSize);
}
byte[] rawReverse = new byte [rawInput.Length + 256];
int rlen = decryptor.TransformBlock
(rawOutput, 0, cutoff, rawReverse, 0);
rawTail = decryptor.TransformFinalBlock
(rawOutput, cutoff, len - cutoff);
Array.Copy(rawTail, 0, rawReverse, rlen, rawTail.Length);
rlen += rawTail.Length;
((IDisposable)decryptor).Dispose();
// Compare the reversed plaintext with the original.
if(padding != PaddingMode.None)
{
AssertEquals(GetError
("reversed plaintext has incorrect length",
alg, input), rawInput.Length, rlen);
if(!IdenticalBlock(rawInput, 0, rawReverse, 0, rlen))
{
Fail(GetError
("reversed plaintext is not the same as original",
alg, input));
}
}
else
{
if(rawInput.Length > rlen)
{
Fail(GetError
("reversed plaintext has incorrect length",
alg, input));
}
if(!IdenticalBlock(rawInput, 0, rawReverse, 0,
rawInput.Length))
{
Fail(GetError
("reversed plaintext is not the same as original",
alg, input));
}
}
// Encrypt the padded plaintext using a primitive
// algorithm simulation to verify the expected output.
byte[] paddedOutput;
switch(mode)
{
case CipherMode.ECB:
{
paddedOutput = DoECB(paddedInput, alg, key);
}
break;
case CipherMode.CBC:
{
paddedOutput = DoCBC(paddedInput, alg, key, iv);
}
break;
case CipherMode.OFB:
{
paddedOutput = DoOFB(paddedInput, alg, key, iv);
}
break;
case CipherMode.CFB:
{
paddedOutput = DoCFB(paddedInput, alg, key, iv);
}
break;
case CipherMode.CTS:
default:
{
paddedOutput = DoCTS(paddedInput, alg, key, iv);
}
break;
}
// Compare the actual output with the expected output.
AssertEquals(GetError("ciphertext has incorrect length",
alg, input),
paddedOutput.Length, len);
if(!IdenticalBlock(paddedOutput, 0, rawOutput, 0, len))
{
Fail(GetError("ciphertext was not the expected value",
alg, input));
}
}
// Run a symmetric algorithm test.
protected void RunSymmetric(SymmetricAlgorithm alg, byte[] key,
byte[] plaintext, byte[] expected)
{
// Set up the algorithm the way we want.
alg.Mode = CipherMode.ECB;
alg.Padding = PaddingMode.None;
// Create an encryptor and run the test forwards.
ICryptoTransform encryptor = alg.CreateEncryptor(key, null);
byte[] output = new byte [plaintext.Length * 2];
byte[] tail;
int len = encryptor.TransformBlock
(plaintext, 0, plaintext.Length,
output, 0);
AssertEquals("ECB encrypt length mismatch",
len, expected.Length);
tail = encryptor.TransformFinalBlock
(plaintext, 0, 0);
AssertNotNull("ECB encrypt tail should be non-null");
AssertEquals("ECB encrypt tail should be zero length",
tail.Length, 0);
if(!IdenticalBlock(expected, 0, output, 0,
expected.Length))
{
Fail("did not encrypt to the expected output");
}
encryptor.Dispose();
// Create a decryptor and run the test backwards.
ICryptoTransform decryptor = alg.CreateDecryptor(key, null);
len = decryptor.TransformBlock
(expected, 0, expected.Length, output, 0);
AssertEquals("ECB decrypt length mismatch",
len, expected.Length);
tail = decryptor.TransformFinalBlock
(expected, 0, 0);
AssertNotNull("ECB decrypt tail should be non-null");
AssertEquals("ECB decrypt tail should be zero length",
tail.Length, 0);
if(!IdenticalBlock(plaintext, 0, output, 0,
plaintext.Length))
{
Fail("did not decrypt to the original plaintext");
}
decryptor.Dispose();
}
private static bool TestRoundTrip(SymmetricAlgorithm testAlgorithm, SymmetricAlgorithm baseline, List<byte[]> data, out byte[] result)
{
result = null;
try
{
byte[] testCipherValue;
byte[] baselineCipherValue;
using (MemoryStream testEncrypted = new MemoryStream())
using (MemoryStream baselineEncrypted = new MemoryStream())
{
using (CryptoStream testEncryptor = new CryptoStream(testEncrypted, testAlgorithm.CreateEncryptor(), CryptoStreamMode.Write))
using (CryptoStream baselineEncryptor = new CryptoStream(baselineEncrypted, baseline.CreateEncryptor(), CryptoStreamMode.Write))
{
foreach (byte[] blocks in data)
{
testEncryptor.Write(blocks, 0, blocks.Length);
baselineEncryptor.Write(blocks, 0, blocks.Length);
}
testEncryptor.Close();
baselineEncryptor.Close();
testCipherValue = testEncrypted.ToArray();
baselineCipherValue = baselineEncrypted.ToArray();
}
}
byte[] testRoundtrip;
byte[] baselineRoundtrip;
using (MemoryStream testDecrypted = new MemoryStream())
using (MemoryStream baselineDecrypted = new MemoryStream())
{
using (CryptoStream testDecryptor = new CryptoStream(testDecrypted, testAlgorithm.CreateDecryptor(), CryptoStreamMode.Write))
using (CryptoStream baselineDecryptor = new CryptoStream(baselineDecrypted, baseline.CreateDecryptor(), CryptoStreamMode.Write))
{
testDecryptor.Write(baselineCipherValue, 0, baselineCipherValue.Length);
testDecryptor.Close();
baselineDecryptor.Write(testCipherValue, 0, testCipherValue.Length);
baselineDecryptor.Close();
testRoundtrip = testDecrypted.ToArray();
baselineRoundtrip = baselineDecrypted.ToArray();
}
}
if (!CompareBytes(testRoundtrip, baselineRoundtrip))
{
Console.WriteLine("Roundtrip bytes do not match");
Console.WriteLine("Test data: {0}", ByteArrayToString(testRoundtrip));
Console.WriteLine("Baseline data: {0}", ByteArrayToString(baselineRoundtrip));
Console.WriteLine("Key: {0}", ByteArrayToString(testAlgorithm.Key));
Console.WriteLine("IV: {0}", ByteArrayToString(testAlgorithm.IV));
Console.WriteLine("Cipher mode: {0}", testAlgorithm.Mode.ToString());
Console.WriteLine("Padding mode: {0}", testAlgorithm.Padding.ToString());
return false;
}
result = testRoundtrip;
return true;
}
catch (Exception e)
{
Console.WriteLine("Got an exception, fail");
Console.WriteLine(e);
return false;
}
}
static void Speed(SymmetricAlgorithm cipher, int block)
{
byte[] input = new byte [block];
byte[] output = new byte [block];
DateTime now = DateTime.UtcNow;
long size = 0;
ICryptoTransform transform = cipher.CreateEncryptor ();
while ((DateTime.UtcNow - now).TotalSeconds < 30) {
transform.TransformBlock (input, 0, input.Length, output, 0);
size += input.Length;
}
transform.TransformFinalBlock (input, 0, input.Length);
size += input.Length;
double speed = size / (DateTime.UtcNow - now).TotalSeconds;
Console.WriteLine ("{0}: {1}: {2} Mbytes/sec", block, cipher, speed / 1024 / 1024);
}
