/// <summary>
/// 加密字符串返回加密后的字节
/// </summary>
/// <param name="plainText"></param>
/// <returns></returns>
public static byte[] EncryptPlainText(string plainText)
{
TripleDES ta = TripleDES.Create();
ta.KeySize = 128;
ta.GenerateKey();
ta.GenerateIV();
ta.Mode = CipherMode.ECB;
ta.Padding = PaddingMode.PKCS7;
byte[] head = new byte[4];
new Random().NextBytes(head);
byte[] key = ta.Key;
byte[] cipherbytes = null;
try
{
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, ta.CreateEncryptor(), CryptoStreamMode.Write);
byte[] plainbytes = Encoding.Default.GetBytes(plainText);
cs.Write(plainbytes, 0, plainbytes.Length);
cs.Close();
byte[] cipherText = ms.ToArray();
ms.Close();
int len = cipherText.Length + 20;
cipherbytes = new byte[len];
head.CopyTo(cipherbytes, 0);
key.CopyTo(cipherbytes, 4);
cipherText.CopyTo(cipherbytes, 20);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
return(cipherbytes);
}
public static string Encrypt(string key, string data)
{
if (string.IsNullOrEmpty(data))
{
return("");
}
data = data.Trim();
byte[] keydata = Encoding.ASCII.GetBytes(key);
string md5String = BitConverter.ToString(new MD5CryptoServiceProvider().ComputeHash(keydata)).Replace("-", "").ToLower();
byte[] tripleDesKey = Encoding.ASCII.GetBytes(md5String.Substring(0, 24));
TripleDES tripdes = TripleDESCryptoServiceProvider.Create();
tripdes.Mode = CipherMode.ECB;
tripdes.Key = tripleDesKey;
tripdes.GenerateIV();
MemoryStream ms = new MemoryStream();
CryptoStream encStream = new CryptoStream(ms, tripdes.CreateEncryptor(), CryptoStreamMode.Write);
encStream.Write(Encoding.ASCII.GetBytes(data), 0, Encoding.ASCII.GetByteCount(data));
encStream.FlushFinalBlock();
byte[] cryptoByte = ms.ToArray();
ms.Close();
encStream.Close();
return(Convert.ToBase64String(cryptoByte, 0, cryptoByte.GetLength(0)).Trim());
}
public void Key()
{
TripleDES algo = TripleDES.Create();
algo.GenerateKey();
algo.GenerateIV();
Assert.AreEqual(192, algo.KeySize, "Key Size");
Assert.AreEqual(24, algo.Key.Length, "Key Length");
Assert.AreEqual(8, algo.IV.Length, "IV Length");
}
/// <summary>
/// 获得初始向量 IV.
/// </summary>
/// <returns>初试向量 IV.</returns>
private byte[] GetLegalIV()
{
string sTemp = IV;
mydes.GenerateIV();
byte[] bytTemp = mydes.IV;
int IVLength = bytTemp.Length;
if (sTemp.Length > IVLength)
{
sTemp = sTemp.Substring(0, IVLength);
}
else if (sTemp.Length < IVLength)
{
sTemp = sTemp.PadRight(IVLength, ' ');
}
return(ASCIIEncoding.ASCII.GetBytes(sTemp));
}
public static string Decrypt11(string key, string dataen)
{
byte[] toEncryptArray = Convert.FromBase64String(dataen);
byte[] keydata = Encoding.ASCII.GetBytes(key);
string md5String = BitConverter.ToString(new MD5CryptoServiceProvider().ComputeHash(keydata)).Replace("-", "").ToLower();
byte[] tripleDesKey = Encoding.ASCII.GetBytes(md5String.Substring(0, 24));
TripleDES tripdes = TripleDESCryptoServiceProvider.Create();
tripdes.Mode = CipherMode.ECB;
tripdes.Padding = PaddingMode.PKCS7;
tripdes.Key = tripleDesKey;
tripdes.GenerateIV();
ICryptoTransform ict = tripdes.CreateDecryptor();
byte[] resultArray = ict.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
tripdes.Clear();
return(Encoding.ASCII.GetString(resultArray));
}
public static string encrypt3des(string input, string key_seed)
{
string s = Crypto.MD5SUM(Encoding.ASCII.GetBytes(key_seed)).Substring(0, 24);
input = input.Trim();
ASCIIEncoding asciiEncoding = new ASCIIEncoding();
TripleDES tripleDes = TripleDES.Create();
tripleDes.Padding = PaddingMode.Zeros;
tripleDes.Mode = CipherMode.ECB;
tripleDes.Key = asciiEncoding.GetBytes(s);
tripleDes.GenerateIV();
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream((Stream)memoryStream, tripleDes.CreateEncryptor(), CryptoStreamMode.Write);
cryptoStream.Write(asciiEncoding.GetBytes(input), 0, asciiEncoding.GetByteCount(input));
cryptoStream.FlushFinalBlock();
byte[] inArray = memoryStream.ToArray();
memoryStream.Close();
cryptoStream.Close();
return(Convert.ToBase64String(inArray, 0, inArray.GetLength(0)).Trim());
}
/// <summary>
/// 按照key，解密
/// </summary>
/// <param name="key"></param>
/// <param name="cipherText"></param>
/// <returns></returns>
private static byte[] DecryptCipherText(byte[] key, byte[] cipherText)
{
TripleDES ta = TripleDES.Create();
ta.KeySize = 0x80;
ta.Key = key;
ta.GenerateIV();
ta.Mode = CipherMode.ECB;
ta.Padding = PaddingMode.PKCS7;
MemoryStream ms = new MemoryStream(cipherText);
CryptoStream cs = new CryptoStream(ms, ta.CreateDecryptor(), CryptoStreamMode.Read);
byte[] plainbytesT = new byte[cipherText.Length];
int i = 0;
try
{
int b;
while ((b = cs.ReadByte()) != -1)
{
plainbytesT[i] = (byte)b;
i++;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
byte[] plainbytes = new byte[i];
Array.Copy(plainbytesT, 0, plainbytes, 0, i);
try
{
cs.Close();
ms.Close();
}
catch { }
return(plainbytes);
}
public string CreateTripleDESIV()
{
tripleDES.GenerateIV();
return(ByteToString(tripleDES.IV));
}
public EncryptedString(string String)
{
des.GenerateIV();
des.GenerateKey();
Set(String);
}