public bool TryDecrypt(string encryptedItem, string password, out string decryptedItem)
{
if (string.IsNullOrEmpty (encryptedItem) ||
string.IsNullOrEmpty (password)) {
decryptedItem = "";
return false;
}
try {
byte[] cipherBytes = Convert.FromBase64String (encryptedItem);
using (var memoryStream = new MemoryStream(cipherBytes)) {
var des = new DESCryptoServiceProvider ();
byte[] iv = new byte[8];
memoryStream.Read (iv, 0, iv.Length);
var rfc2898DeriveBytes = new Rfc2898DeriveBytes (password, iv, ITERATIONS);
byte[] key = rfc2898DeriveBytes.GetBytes (8);
using (var cryptoStream = new CryptoStream(memoryStream, des.CreateDecryptor(key, iv), CryptoStreamMode.Read))
using (var streamReader = new StreamReader(cryptoStream)) {
decryptedItem = streamReader.ReadToEnd ();
return true;
}
}
} catch (Exception ex) {
Logger.instance.Log (new Logger.Message (this, ex));
decryptedItem = "";
return false;
}
}
static int Main ()
{
string filename = Path.Combine (AppDomain.CurrentDomain.BaseDirectory,
"encrypt.tmp");
string data = "this is sensitive data";
DESCryptoServiceProvider des = new DESCryptoServiceProvider ();
des.GenerateIV ();
des.GenerateKey ();
// ----------- WRITING ENCRYPTED SERIALIZED DATA ------------------
Stream stream = new FileStream (filename, FileMode.Create, FileAccess.Write);
stream = new CryptoStream (stream, des.CreateEncryptor (), CryptoStreamMode.Write);
BinaryFormatter bformatter = new BinaryFormatter ();
bformatter.Serialize (stream, data);
stream.Close ();
stream = null;
bformatter = null;
data = string.Empty;
// ----------- READING ENCRYPTED SERIALIZED DATA ------------------
stream = new FileStream (filename, FileMode.Open, FileAccess.Read);
stream = new CryptoStream (stream, des.CreateDecryptor (), CryptoStreamMode.Read);
bformatter = new BinaryFormatter ();
data = (string) bformatter.Deserialize (stream);
stream.Close ();
//----------- CHECK RESULTS ----------------
if (data != "this is sensitive data")
return 1;
return 0;
}
public static string Decrypt(string originalString, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[originalString.Length / 2];
for (int x = 0; x < originalString.Length / 2; x++)
{
int i = (Convert.ToInt32(originalString.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
//建立加密对象的密钥和偏移量，此值重要，不能修改
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV)
{
//Create the file streams to handle the input and output files.
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
//Create variables to help with read and write.
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
long rdlen = 0; //This is the total number of bytes written.
long totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be written at a time.
SymmetricAlgorithm des = new DESCryptoServiceProvider();
des.Padding = PaddingMode.PKCS7;
CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);
Console.WriteLine("Decrypting...");
//Read from the input file, then encrypt and write to the output file.
while(rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
Console.WriteLine("{0} bytes processed", rdlen);
}
encStream.Close();
}
/// <summary>
/// 对文件内容进行DES解密
/// </summary>
/// <param name="sourceFile">待解密的文件绝对路径</param>
/// <param name="destFile">解密后的文件保存的绝对路径</param>
public static void DecryptFile(string sourceFile, string destFile)
{
if (!File.Exists(sourceFile)) throw new FileNotFoundException("指定的文件路径不存在！", sourceFile);
byte[] btKey = Encoding.Default.GetBytes(key);
byte[] btIV = Encoding.Default.GetBytes(iv);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] btFile = File.ReadAllBytes(sourceFile);
using (FileStream fs = new FileStream(destFile, FileMode.Create, FileAccess.Write))
{
try
{
using (CryptoStream cs = new CryptoStream(fs, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
{
cs.Write(btFile, 0, btFile.Length);
cs.FlushFinalBlock();
}
}
catch
{
throw;
}
finally
{
fs.Close();
}
}
}
//cmThe function used to decrypt the text
private static string Decrypt(string strText, string SaltKey)
{
byte[] byKey = { };
byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };
byte[] inputByteArray = new byte[strText.Length + 1];
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(SaltKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(strText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
catch (Exception ex)
{
return ex.Message;
}
}
private string DeCryption(string content, string sKey, string sIV)
{
try
{
byte[] inputByteArray = Convert.FromBase64String(content);
using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider())
{
//byte[] inputByteArray = Convert.FromBase64String(content);
desProvider.Key = System.Text.Encoding.ASCII.GetBytes(sKey);
desProvider.IV = System.Text.Encoding.ASCII.GetBytes(sIV);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
using (CryptoStream cs = new CryptoStream(ms,desProvider.CreateDecryptor(), CryptoStreamMode.Write))
{
//cs.Clear();
cs.Write(inputByteArray,0,inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
string str = System.Text.Encoding.UTF8.GetString(ms.ToArray());
ms.Close();
return str;
}
}
catch
{
return "String Not Base64 Encode!!!";
}
}
/// <summary>
/// 对数据进行解密
/// </summary>
/// <param name="decryptstring">需要解密的数据</param>
/// <returns></returns>
public static string Decode(string data)
{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
byte[] byEnc;
try
{
byEnc = Convert.FromBase64String(data);
}
catch
{
return null;
}
try
{
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream ms = new MemoryStream(byEnc);
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cst);
return sr.ReadToEnd();
}
catch
{
return null;
}
}
public static string Decrypt(string stringToDecrypt)
{
string sEncryptionKey = "thuynnxkey";
byte[] key = { };
byte[] IV = { 10, 20, 30, 40, 50, 60, 70, 80 };
byte[] inputByteArray = new byte[stringToDecrypt.Length];
try
{
key = Encoding.UTF8.GetBytes(sEncryptionKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(stringToDecrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
Encoding encoding = Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
catch (System.Exception ex)
{
SiAuto.Main.LogString("Lỗi :", ex.ToString());
return (string.Empty);
}
}
public static SaveData Load()
{
if (!File.Exists("save01.sav"))
return null;
SaveData data = null;
using(Stream stream = File.Open("save01.sav", FileMode.Open)) {
BinaryFormatter binaryFormatter = new BinaryFormatter();
binaryFormatter.Binder = new VersionDeserializationBinder();
byte[] byKey = Encoding.UTF8.GetBytes(strEncrypt.Substring(0, 8));
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) {
using (Stream cryptoStream = new CryptoStream(stream, des.CreateDecryptor(byKey, dv), CryptoStreamMode.Read))
{
Log.debug("Save", "Loading...");
try {
data = (SaveData) binaryFormatter.Deserialize(cryptoStream);
} catch (Exception e) {
Log.debug("Save", ""+e);
return new SaveData();
}
Log.debug("Save", "Loaded (level={0})", data.level);
cryptoStream.Close();
}
}
stream.Close();
}
return data;
}
public string Decrypt(string SourceData)
{
byte[] EncryptedDataBytes = Convert.FromBase64String(SourceData);
MemoryStream TempStream = new MemoryStream(EncryptedDataBytes, 0, EncryptedDataBytes.Length);
DESCryptoServiceProvider Decryptor = new DESCryptoServiceProvider();
CryptoStream DecryptionStream = new CryptoStream(TempStream, Decryptor.CreateDecryptor(Key, Iv), CryptoStreamMode.Read);
StreamReader AllDataReader = new StreamReader(DecryptionStream);
return AllDataReader.ReadToEnd();
}
public static string DESDecrypt(string input)
{
byte[] bytes = Encoding.ASCII.GetBytes((string)ConfigurationSettings.AppSettings["CipherKeyProd"]);
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream
(Convert.FromBase64String(input));
CryptoStream cryptoStream = new CryptoStream(memoryStream,
cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptoStream);
return reader.ReadToEnd();
}
/**/
/// <summary>
/// 对称加密解密的密钥
/// </summary>
public static string Key
{
get
{
return key;
}
set
{
key = value;
}
}
#endregion Properties
#region Methods
/**/
/// <summary>
/// DES解密
/// </summary>
/// <param name="decryptString"></param>
/// <returns></returns>
public static string DesDecrypt(string decryptString)
{
byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
byte[] keyIV = keyBytes;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, provider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
public string Decrypt(string input)
{
string output = "";
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(input));
CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(cryptBytes, cryptBytes), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptoStream);
output = reader.ReadToEnd();
return output;
}
public static string DecryptDES(string text, byte[] key)
{
if(text != null && text != "")
{
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(text));
CryptoStream cryptoStream = new CryptoStream(memoryStream,
cryptoProvider.CreateDecryptor(key, key), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptoStream);
text = reader.ReadToEnd();
}
return text;
}
//by me
public string Decrypt(string oldword)
{
if (String.IsNullOrEmpty(oldword))
{
throw new ArgumentNullException("The string which needs to be decrypted can not be null.");
}
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(oldword));
CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptoStream);
return reader.ReadToEnd();
}
static Boolean Test()
{
Byte[] PlainText = {0, 1, 2, 3, 4, 5, 6, 7}; //, 8, 9, 10, 11, 12, 13, 14, 15};
Byte[] Key = {1, 1, 1, 1, 1, 1, 1, 2};
Byte[] IV = {1, 1, 1, 1, 1, 1, 1, 1};
Console.WriteLine("Encrypting the following bytes:");
PrintByteArray(PlainText);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Mode = CipherMode.ECB;
// des.FeedbackSize = 0;
des.Padding = PaddingMode.None;
Console.WriteLine("DES default key size = " + des.KeySize);
ICryptoTransform sse = des.CreateEncryptor(Key, IV);
Console.WriteLine("SSE mode = " + des.Mode);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, sse, CryptoStreamMode.Write);
cs.Write(PlainText,0,PlainText.Length);
cs.FlushFinalBlock();
byte[] CipherText = ms.ToArray();
cs.Close();
Console.WriteLine("Cyphertext:");
PrintByteArray(CipherText);
Console.WriteLine("Decrypting...");
// DESCryptoServiceProvider des = new DESCryptoServiceProvider();
// des.Mode = CipherMode.ECB;
// des.FeedbackSize = 0;
ICryptoTransform ssd = des.CreateDecryptor(Key, IV);
Console.WriteLine("SSD mode = " + des.Mode);
cs = new CryptoStream(new MemoryStream(CipherText), ssd, CryptoStreamMode.Read);
byte[] NewPlainText = new byte[8];
cs.Read(NewPlainText,0,8);
PrintByteArray(NewPlainText);
if (!Compare(PlainText, NewPlainText)) {
Console.WriteLine("ERROR: roundtrip failed");
return false;
}
return true;
}
/// <summary>
/// Standard DES decryption
/// </summary>
/// <param name="val">Value of decrypted</param>
/// <returns>Returns decrypted value as string</returns>
public static string Decrypt(string val)
{
string decrpted = "";
if (val != "") {
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
//convert from string to byte
byte[] buffer = Convert.FromBase64String(val);
MemoryStream ms = new MemoryStream(buffer);
CryptoStream cs = new CryptoStream(ms, cryptoProvider.CreateDecryptor(KEY_64, IV_64), CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cs);
decrpted = sr.ReadToEnd();
}
return decrpted;
}
// 解密字符串
public string DecryptString(string sInputString, string sKey)
{
string[] sInput = sInputString.Split("-".ToCharArray());
var data = new byte[sInput.Length];
for (int i = 0; i < sInput.Length; i++)
{
data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);
}
var DES = new DESCryptoServiceProvider();
DES.Key = Encoding.ASCII.GetBytes(sKey);
DES.IV = Encoding.ASCII.GetBytes(sKey);
ICryptoTransform desencrypt = DES.CreateDecryptor();
byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
return Encoding.UTF8.GetString(result);
}
/// <summary>
/// MD5解密
/// </summary>
/// <param name="Source">需要解密的字符串</param>
/// <returns>MD5解密后的字符串</returns>
public string Md5Decrypt(string Source)
{
//将解密字符串转换成字节数组
byte[] bytIn = System.Convert.FromBase64String(Source);
//给出解密的密钥和偏移量，密钥和偏移量必须与加密时的密钥和偏移量相同
byte[] iv = { 103, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = iv;
mobjCryptoService.IV = key;
//实例流进行解密
System.IO.MemoryStream ms = new System.IO.MemoryStream(bytIn, 0, bytIn.Length);
ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
StreamReader strd = new StreamReader(cs, Encoding.Default);
return strd.ReadToEnd();
}
private string Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
byte[] buffer = new byte[pToDecrypt.Length / 2];
for (int i = 0; i < (pToDecrypt.Length / 2); i++)
{
int num2 = Convert.ToInt32(pToDecrypt.Substring(i * 2, 2), 0x10);
buffer[i] = (byte)num2;
}
provider.Key = Encoding.ASCII.GetBytes(sKey);
provider.IV = Encoding.ASCII.GetBytes(sKey);
MemoryStream stream = new MemoryStream();
CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
stream2.Write(buffer, 0, buffer.Length);
stream2.FlushFinalBlock();
new StringBuilder();
return Encoding.Default.GetString(stream.ToArray());
}
public static string Decrypt(string pstrText)
{
pstrText = pstrText.Replace(" ", "+");
string pstrDecrKey = "1239;[pewGKG)NisarFidesTech";
byte[] byKey = { };
byte[] IV = { 18, 52, 86, 120, 144, 171, 205, 239 };
byte[] inputByteArray = new byte[pstrText.Length];
byKey = System.Text.Encoding.UTF8.GetBytes(pstrDecrKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(pstrText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
/// <summary>
/// 解密原函数
/// </summary>
/// <param name="pToDecrypt"></param>
/// <param name="sKey"></param>
/// <returns></returns>
static public string DesDecrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.UTF8.GetString(ms.ToArray());
}
public static string DesDecrypt(string toDecryptString,string keyStr)
{
byte[] toDecryptBytes = Convert.FromBase64String(toDecryptString);
using (var des = new DESCryptoServiceProvider())
{
des.Key = Encoding.GetBytes(keyStr);
des.IV = Encoding.GetBytes(keyStr);
var ms = new MemoryStream();
using (var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(toDecryptBytes, 0, toDecryptBytes.Length);
cs.FlushFinalBlock();
cs.Close();
}
string decryptedString = Encoding.GetString(ms.ToArray());
ms.Close();
return decryptedString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
/// <summary>
/// MD5����
/// </summary>
public static string MD5Decrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
public static string DESDecrypt(string str, string key)
{
try
{
str = str.Replace('*', '+');
byte[] rgbKey = System.Text.Encoding.UTF8.GetBytes(key);
byte[] rgbIV = rgbKey;
byte[] inputByteArray = Convert.FromBase64String(str);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
System.IO.MemoryStream mStream = new System.IO.MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return System.Text.Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return "";
}
}
public string Decrypt(string stringToDecrypt, string sEncryptionKey)
{
byte[] inputByteArray = new byte[stringToDecrypt.Length + 1];
try
{
key = System.Text.Encoding.UTF8.GetBytes(sEncryptionKey);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(stringToDecrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms,
des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
catch (Exception e)
{
return e.Message;
}
}
/// DES解密
public string MD5Decrypt(string pToDecrypt, string sKey)
{
var des = new DESCryptoServiceProvider();
var inputByteArray = new byte[pToDecrypt.Length/2];
for (int x = 0; x < pToDecrypt.Length/2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x*2, 2), 16));
inputByteArray[x] = (byte) i;
}
des.Key = Encoding.ASCII.GetBytes(sKey);
des.IV = Encoding.ASCII.GetBytes(sKey);
var ms = new MemoryStream();
var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
var ret = new StringBuilder();
return Encoding.Default.GetString(ms.ToArray());
}
///
/// dec 解密过程
///
///
///
///
public string decrypt(string ptodecrypt, string skey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputbytearray = new byte[ptodecrypt.Length / 2];
for (int x = 0; x < ptodecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(ptodecrypt.Substring(x * 2, 2), 16));
inputbytearray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(skey); //建立加密对象的密钥和偏移量，此值重要，不能修改
des.IV = ASCIIEncoding.ASCII.GetBytes(skey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputbytearray, 0, inputbytearray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder(); //建立stringbuild对象，createdecrypt使用的是流对象，必须把解密后的文本变成流对象
return(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
public static string DecryptData(string STRING)
{
try
{
//Have a Key
byte[] myKey = Encoding.ASCII.GetBytes("ActisKey");
//Have a vector required to create a Crypto stream
byte[] myVector = Encoding.ASCII.GetBytes("ActisKey");
//Create a Service Provider object
DESCryptoServiceProvider myCryptoProvider = new DESCryptoServiceProvider();
//Create a memory strem
MemoryStream myMemoryStream = new MemoryStream(Convert.FromBase64String(STRING));
//Create a Cryptro memory stream
CryptoStream myCryptoStream = new CryptoStream(myMemoryStream, myCryptoProvider.CreateDecryptor(myKey, myVector), CryptoStreamMode.Read);
//HAve a reader
StreamReader myReader = new StreamReader(myCryptoStream);
return(myReader.ReadToEnd());
}
catch (Exception ex)
{
throw ex;
}
}
//C# DES解密方法
public static string DESDecrypt(string encryptedValue, string key, string iv)
{
key = Util.MD5Encrypt32(key).Substring(0, 8);
using (DESCryptoServiceProvider sa = new DESCryptoServiceProvider {
Key = Encoding.UTF8.GetBytes(key), IV = Encoding.UTF8.GetBytes(iv)
})
{
using (ICryptoTransform ct = sa.CreateDecryptor())
{
byte[] byt = Convert.FromBase64String(encryptedValue);
using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, ct, CryptoStreamMode.Write))
{
cs.Write(byt, 0, byt.Length);
cs.FlushFinalBlock();
}
return(Encoding.UTF8.GetString(ms.ToArray()));
}
}
}
}
public void button1_Click(object sender, EventArgs e)
{
t.Start();
TcpClient p = t.AcceptTcpClient();
ns = p.GetStream();
byte[] buffer = new byte[1024];
new Thread(() =>
{
while (true)
{
int size = ns.Read(buffer, 0, buffer.Length);
MemoryStream tw = new MemoryStream();
CryptoStream we = new CryptoStream(tw, provider.CreateDecryptor(), CryptoStreamMode.Write);
we.Write(buffer, 0, size);
we.FlushFinalBlock();
Invoke(new Action(() =>
{
listBox1.Items.Add(Encoding.ASCII.GetString(tw.ToArray()));
}));
}
}).Start();
}
/// <summary>
/// DES解密
/// </summary>
/// <param name="data">解密数据</param>
/// <param name="key">8位字符的密钥字符串(需要和加密时相同)</param>
/// <param name="iv">8位字符的初始化向量字符串(需要和加密时相同)</param>
/// <returns></returns>
public static string DesDecrypt(string data,
string key,
string iv)
{
var byKey = Encoding.ASCII.GetBytes(key);
var byIv = Encoding.ASCII.GetBytes(iv);
byte[] byEnc;
try
{
byEnc = Convert.FromBase64String(data);
}
catch
{
return(null);
}
var cryptoProvider = new DESCryptoServiceProvider();
var ms = new MemoryStream(byEnc);
var cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIv), CryptoStreamMode.Read);
var sr = new StreamReader(cst);
return(sr.ReadToEnd());
}
public static string Decrypt(string pToDecrypt)
{
string s1 = "SeiweLL0";
string s2 = "0SeiweLL";
DESCryptoServiceProvider cryptoServiceProvider = new DESCryptoServiceProvider();
byte[] buffer = new byte[pToDecrypt.Length / 2];
for (int index = 0; index < pToDecrypt.Length / 2; ++index)
{
int int32 = Convert.ToInt32(pToDecrypt.Substring(index * 2, 2), 16);
buffer[index] = (byte)int32;
}
cryptoServiceProvider.Key = Encoding.ASCII.GetBytes(s1);
cryptoServiceProvider.IV = Encoding.ASCII.GetBytes(s2);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream((Stream)memoryStream, cryptoServiceProvider.CreateDecryptor(), CryptoStreamMode.Write);
cryptoStream.Write(buffer, 0, buffer.Length);
cryptoStream.FlushFinalBlock();
StringBuilder stringBuilder = new StringBuilder();
return(Encoding.Default.GetString(memoryStream.ToArray()));
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DesDecrypt(string decryptString, string decryptKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len = decryptString.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(decryptString.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(GetMD5(decryptKey).Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(GetMD5(decryptKey).Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return(Encoding.Default.GetString(ms.ToArray()));
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <returns></returns>
public static string DESDecrypt(this string decryptString)
{
try
{
var bytes = Convert.FromBase64String(decryptString);
using (var des = new DESCryptoServiceProvider())
{
using (var stream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(stream, des.CreateDecryptor(RgbKey, RgbIV), CryptoStreamMode.Write))
{
cryptoStream.Write(bytes, 0, bytes.Length);
cryptoStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(stream.ToArray()));
}
}
}
}
catch
{
return(string.Empty);
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
public static string Decode(string decryptString, string decryptKey = "www.GMS.com")
{
try
{
decryptKey = MD5(decryptKey);
decryptKey = decryptKey.Substring(0, 8);
decryptKey = decryptKey.PadRight(8, ' ');
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
catch
{
return("");
}
}
public string Decrypt(string pText, string pDecrKey)
{
string str = "";
byte[] rgbIV = new byte[] { 0x12, 0x34, 0x56, 120, 0x90, 0xab, 0xcd, 0xef };
byte[] buffer = new byte[pText.Length + 1];
try
{
byte[] bytes = Encoding.UTF8.GetBytes(Strings.Left(pDecrKey, 8));
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
buffer = Convert.FromBase64String(pText);
MemoryStream stream2 = new MemoryStream();
CryptoStream stream = new CryptoStream(stream2, provider.CreateDecryptor(bytes, rgbIV), CryptoStreamMode.Write);
stream.Write(buffer, 0, buffer.Length);
stream.FlushFinalBlock();
str = Encoding.UTF8.GetString(stream2.ToArray());
}
catch (Exception exception1)
{
str = "Decrypt error" + exception1.StackTrace;
}
return(str);
}
/// <summary>
/// DES对称解密，密钥必须为8位
/// </summary>
/// <param name="textToDecrypt"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string DESDecrypt(string textToDecrypt, string key)
{
if (string.IsNullOrEmpty(key) || key.Length != 8)
{
throw new Error("请提供有效的8位密钥");
}
byte[] inputByteArray = Convert.FromBase64String(textToDecrypt);
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
{
des.Key = ASCIIEncoding.ASCII.GetBytes(key);
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
string str = Encoding.UTF8.GetString(ms.ToArray());
ms.Close();
return(str);
}
}
//DES解密
private static string DESDecode(string decodeStr)
{
string key = "nimeiaaa";
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[decodeStr.Length / 2];
for (int x = 0; x < decodeStr.Length / 2; x++)
{
int i = (Convert.ToInt32(decodeStr.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(key);
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
static string DESDecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
{
string plaintext = null;
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) {
des.Key = Key;
des.IV = new byte[IV.Length];
des.Padding = PaddingMode.PKCS7;
des.BlockSize = 64;
des.Mode = CipherMode.ECB;
ICryptoTransform decryptor = des.CreateDecryptor(des.Key, des.IV);
using (MemoryStream msDecrypt = new MemoryStream(cipherText)) {
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) {
using (StreamReader srDecrypt = new StreamReader(csDecrypt)) {
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return(plaintext);
}
// Methods
public static string Decrypt(this string cryptedString, byte[] key)
{
if (string.IsNullOrEmpty(cryptedString))
{
throw new ArgumentNullException("The string which needs to be decrypted can not be null.");
}
if (key.Length < 8)
{
throw new ArgumentException("Password key length should be nore than 8");
}
byte[] destinationArray = new byte[8];
Array.Copy(key, destinationArray, 8);
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
MemoryStream stream = new MemoryStream(Convert.FromBase64String(cryptedString));
CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(destinationArray, destinationArray), CryptoStreamMode.Read);
string str = new StreamReader(stream2).ReadToEnd();
if (string.CompareOrdinal(str, EMPTY) == 0)
{
return(string.Empty);
}
return(str);
}
public static string Decrypt(string EncryptedText)
{
byte[] inputByteArray = new byte[EncryptedText.Length + 1];
byte[] rgbIV = { 0x21, 0x43, 0x56, 0x87, 0x10, 0xfd, 0xea, 0x1c };
byte[] key = { };
try
{
key = System.Text.Encoding.UTF8.GetBytes("A0D1nX0Q");
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(EncryptedText);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, rgbIV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return(encoding.GetString(ms.ToArray()));
}
catch (Exception e)
{
return(e.Message);
}
}
public static string DecryptDESECBPKCS7(string source, string key)
{
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] sourceArray = Convert.FromBase64String(source);
des.Mode = CipherMode.ECB;
des.Padding = PaddingMode.PKCS7;
des.Key = Encoding.UTF8.GetBytes(key);
des.IV = Encoding.UTF8.GetBytes(key);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(sourceArray, 0, sourceArray.Length);
cs.FlushFinalBlock();
cs.Close();
ms.Close();
return(Encoding.UTF8.GetString(ms.ToArray()));
}
catch (Exception)
{
return("");
}
}
/// <summary>
/// 解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
using (MemoryStream mStream = new MemoryStream())
{
using (CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
{
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
}
}
catch
{
return(decryptString);
}
}
/// <summary>
/// 对DES加密后的字符串进行解密
/// </summary>
/// <param name="encryptedString">待解密的字符串</param>
/// <returns>解密后的字符串</returns>
public static string Decrypt(string encryptedString)
{
byte[] btKey = Encoding.Default.GetBytes(key);
byte[] btIV = Encoding.Default.GetBytes(iv);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
using (MemoryStream ms = new MemoryStream())
{
byte[] inData = Convert.FromBase64String(encryptedString);
try
{
using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
{
cs.Write(inData, 0, inData.Length);
cs.FlushFinalBlock();
}
return Encoding.Default.GetString(ms.ToArray());
}
catch
{
throw;
}
}
}
/// <summary>
/// Metoda koja dekriptira sadržaj na temelju ključa i inicijalizacijskoga vektora
/// </summary>
/// <param name="dataToDecrypt"></param>
/// <returns></returns>
public override string DecryptData(string dataToDecrypt)
{
string result;
var data = Convert.FromBase64String(dataToDecrypt);
using (var des = new DESCryptoServiceProvider())
{
des.Mode = CipherMode.CBC;
des.Padding = PaddingMode.PKCS7;
des.Key = key;
des.IV = IV;
using (var memoryStream = new MemoryStream())
{
var cryptoStream = new CryptoStream(memoryStream,
des.CreateDecryptor(), CryptoStreamMode.Write);
cryptoStream.Write(data, 0, data.Length);
cryptoStream.FlushFinalBlock();
var decryptBytes = memoryStream.ToArray();
result = Encoding.UTF8.GetString(decryptBytes);
return(result);
}
}
}
public static string Decrypt(string str, string shortKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Mode = CipherMode.ECB;//java默认是ECB
des.Padding = PaddingMode.PKCS7;
byte[] inputByteArray = new byte[str.Length / 2];
for (int x = 0; x < str.Length / 2; x++)
{
int i = (Convert.ToInt32(str.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = Encoding.UTF8.GetBytes(shortKey);
des.IV = Encoding.UTF8.GetBytes(shortKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
/// <summary>
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Decrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return(Encoding.Default.GetString(ms.ToArray()));
}
/// <summary>
/// Decrypts the specified string to decrypt.
/// </summary>
/// <param name="stringToDecrypt">The string to decrypt.</param>
/// <param name="decryptionKey">The decryption key.</param>
/// <returns>Return string</returns>
public string Decrypt(string stringToDecrypt, string decryptionKey)
{
///// byte[] inputByteArray = new byte[stringToDecrypt.Length + 1];
byte[] inputByteArray;
try
{
stringToDecrypt = stringToDecrypt.Replace(" ", "+");
stringToDecrypt = stringToDecrypt.Replace("-", "/");
this.key = System.Text.Encoding.UTF8.GetBytes(this.Left(decryptionKey, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(stringToDecrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(this.key, this.iV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return(encoding.GetString(ms.ToArray()));
}
catch (Exception e)
{
return(e.Message);
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="key"></param>
/// <param name="data"></param>
/// <returns></returns>
public static string Decrypt(string key, string data)
{
if (string.IsNullOrEmpty(data))
{
return(string.Empty);
}
byte[] rgbKey = Encoding.UTF8.GetBytes(key);
byte[] rgbIV = Encoding.UTF8.GetBytes(key);
byte[] inputByteArray = HexStringToByteArray(data);
DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
desc.Mode = CipherMode.CBC;
desc.Padding = PaddingMode.PKCS7;
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, desc.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
/// DES解密
/// <param >待解密的字符串</param>
/// <param >解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string Decrypt(string decryptString)
{
try
{
Encoding ed = Encoding.UTF8;
decryptString = ed.GetString(Convert.FromBase64String(decryptString));
string decryptKey = KeyValue;
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
catch
{
//return decryptString;
return("Decrypt Failed!");
}
}
public void Decrypt(string inputFilename,
string outputFilename,
string sKey)
{
sKey = Base64Encode(sKey);
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
FileStream fsread = new FileStream(inputFilename,
FileMode.Open,
FileAccess.Read);
ICryptoTransform desdecrypt = DES.CreateDecryptor();
CryptoStream cryptostreamDecr = new CryptoStream(fsread,
desdecrypt,
CryptoStreamMode.Read);
StreamWriter fsDecrypted = new StreamWriter(outputFilename);
fsDecrypted.Write(new StreamReader(cryptostreamDecr).ReadToEnd());
fsDecrypted.Flush();
fsDecrypted.Close();
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="toDecryptString">待解密的字符串</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string Decrypt(string toDecryptString)
{
try
{
if (toDecryptString == null || toDecryptString == "" || toDecryptString == string.Empty)
{
return("");
}
byte[] rgbKey = Encoding.UTF8.GetBytes(key);
byte[] rgbIV = IV;
byte[] inputByteArray = Convert.FromBase64String(toDecryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
catch
{
return(toDecryptString);
}
}
///MD5解密
public static string MD5Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
public static string Decrypt(string text)
{
try
{
key = Encoding.UTF8.GetBytes(stringKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
Byte[] byteArray = Convert.FromBase64String(text);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream,
des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
cryptoStream.Write(byteArray, 0, byteArray.Length);
cryptoStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(memoryStream.ToArray()));
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString)
{
if (decryptString == "")
{
return("");
}
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes("openblog");
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
catch (Exception ex)
{
return(ex.Message);
}
}
/// <summa
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Decrypt(string Text, string sKey)
{
DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider();
int num = Text.Length / 2;
byte[] array = new byte[num];
for (int i = 0; i < num; i++)
{
int num2 = Convert.ToInt32(Text.Substring(i * 2, 2), 16);
array[i] = (byte)num2;
}
dESCryptoServiceProvider.Key = Encoding.ASCII.GetBytes(MD5Lower(sKey).Substring(0, 8));
dESCryptoServiceProvider.IV = Encoding.ASCII.GetBytes(MD5Lower(sKey).Substring(0, 8));
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, dESCryptoServiceProvider.CreateDecryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(array, 0, array.Length);
cryptoStream.FlushFinalBlock();
return(Encoding.Default.GetString(memoryStream.ToArray()));
}
}
}
/// <summary>
/// DES解密
/// </summary>
/// <param name="pwd">密文</param>
/// <param name="key">密钥</param>
/// <returns>明文</returns>
public static string DESDecrypt(string decryptString, string key)
{
//默认向量
byte[] ivs = { 0x13, 0x24, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
using (DESCryptoServiceProvider dES = new DESCryptoServiceProvider())
{
byte[] inputByteArray = Convert.FromBase64String(decryptString);
dES.Key = ASCIIEncoding.ASCII.GetBytes(key);
dES.IV = ivs;
MemoryStream memory = new MemoryStream();
using (CryptoStream csStream = new CryptoStream(memory, dES.CreateDecryptor(), CryptoStreamMode.Write))
{
csStream.Write(inputByteArray, 0, inputByteArray.Length);
csStream.FlushFinalBlock();
}
string result = Encoding.UTF8.GetString(memory.ToArray());
memory.Close();
return(result);
}
}
