/// <summary>
/// 解密
/// </summary>
public static string Decode(string encryptStr)
{
byte[] bKey = Encoding.UTF8.GetBytes(Key);
byte[] bIV = Encoding.UTF8.GetBytes(IV);
encryptStr = encryptStr.Replace(" ", "+");
byte[] byteArray = Convert.FromBase64String(encryptStr);
string decrypt = null;
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
try
{
using (MemoryStream mStream = new MemoryStream())
{
using (CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write))
{
cStream.Write(byteArray, 0, byteArray.Length);
cStream.FlushFinalBlock();
decrypt = Encoding.UTF8.GetString(mStream.ToArray());
}
}
}
catch { }
des.Clear();
return decrypt;
}
public static ICryptoTransform CreateEncryptor(string key, CryptionType type)
{
ICryptoTransform transform;
SHA512 sha512 = new SHA512CryptoServiceProvider();
var bytes = sha512.ComputeHash(Sha1(key).ToAsciiBytes());
switch (type)
{
case CryptionType.Aes:
var aes = Rijndael.Create();
aes.Mode = CipherMode.CBC;
transform = aes.CreateEncryptor(bytes.Skip(17).Take(32).ToArray(), bytes.Skip(17).Take(16).ToArray());
aes.Clear();
break;
case CryptionType.Des:
var des = new DESCryptoServiceProvider { Mode = CipherMode.CBC };
transform = des.CreateEncryptor(bytes.Skip(17).Take(8).ToArray(), bytes.Skip(17).Take(16).ToArray());
des.Clear();
break;
default:
var tripleDes = new TripleDESCryptoServiceProvider { Mode = CipherMode.CBC };
transform = tripleDes.CreateEncryptor(bytes.Skip(17).Take(24).ToArray(), bytes.Skip(17).Take(16).ToArray());
tripleDes.Clear();
break;
}
return transform;
}
public static byte[] smethod_22(byte[] byte_0, string string_0)
{
System.Security.Cryptography.DESCryptoServiceProvider dESCryptoServiceProvider = new System.Security.Cryptography.DESCryptoServiceProvider();
dESCryptoServiceProvider.Key = System.Text.Encoding.UTF8.GetBytes(string_0);
dESCryptoServiceProvider.Mode = System.Security.Cryptography.CipherMode.ECB;
dESCryptoServiceProvider.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
System.Security.Cryptography.ICryptoTransform cryptoTransform = dESCryptoServiceProvider.CreateDecryptor();
byte[] array = cryptoTransform.TransformFinalBlock(byte_0, 0, byte_0.Length);
dESCryptoServiceProvider.Clear();
System.Array.Resize <byte>(ref array, array.Length - 1);
return(array);
}
/// <summary>
/// 解密字符串
/// </summary>
public static string Decrypt(string ciphertext)
{
string password2 = "Ahbool";
string cipher = string.Empty;
try
{
char[] key = new char[8];
if (password.Length > 8)
{
password = password.Remove(8);
}
password.CopyTo(0, key, 0, password.Length);
char[] iv = new char[8];
if (password2.Length > 8)
{
password2 = password2.Remove(8);
}
password2.CopyTo(0, iv, 0, password2.Length);
if (ciphertext == null)
{
return cipher;
}
SymmetricAlgorithm serviceProvider = new DESCryptoServiceProvider();
serviceProvider.Key = Encoding.ASCII.GetBytes(key);
serviceProvider.IV = Encoding.ASCII.GetBytes(iv);
byte[] contentArray = Convert.FromBase64String(ciphertext);
MemoryStream memoryStream = new MemoryStream(contentArray);
CryptoStream cryptoStream = new CryptoStream(memoryStream, serviceProvider.CreateDecryptor(), CryptoStreamMode.Read);
StreamReader streamReader = new StreamReader(cryptoStream);
cipher = streamReader.ReadToEnd();
streamReader.Dispose();
cryptoStream.Dispose();
memoryStream.Dispose();
serviceProvider.Clear();
}
catch
{
cipher = "123";
}
return cipher;
}
public static byte[] smethod_21(byte[] byte_0, string string_0)
{
byte[] array = byte_0;
System.Array.Resize <byte>(ref array, array.Length + 1);
array[array.Length - 1] = (byte)new System.Random().Next(0, 255);
System.Security.Cryptography.DESCryptoServiceProvider dESCryptoServiceProvider = new System.Security.Cryptography.DESCryptoServiceProvider();
dESCryptoServiceProvider.Key = System.Text.Encoding.UTF8.GetBytes(string_0);
dESCryptoServiceProvider.Mode = System.Security.Cryptography.CipherMode.ECB;
dESCryptoServiceProvider.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
System.Security.Cryptography.ICryptoTransform cryptoTransform = dESCryptoServiceProvider.CreateEncryptor();
byte[] result = cryptoTransform.TransformFinalBlock(array, 0, array.Length);
dESCryptoServiceProvider.Clear();
return(result);
}
/// <summary>
/// Decrypts a string using DES
/// </summary>
/// <param name="Input">Input string</param>
/// <param name="Key">Key to use in decryption (must be at least 8 bytes)</param>
/// <returns>A decrypted string</returns>
public static string Decrypt(string Input,string Key)
{
if (string.IsNullOrEmpty(Input) || string.IsNullOrEmpty(Key))
{
throw new ArgumentNullException("The input/key string can not be empty.");
}
try
{
ASCIIEncoding Encoding = new ASCIIEncoding();
byte[] KeyHashArray = Encoding.GetBytes(Key);
byte[] KeyArray = new byte[8];
byte[] Key2Array = new byte[8];
SHA1CryptoServiceProvider SHA = new SHA1CryptoServiceProvider();
byte[] Hash = SHA.ComputeHash(KeyHashArray);
SHA.Clear();
for (int x = 0; x < 8; ++x)
{
KeyArray[x] = Hash[x];
Key2Array[x] = Hash[x + 8];
}
string Text = null;
DESCryptoServiceProvider Decryptor = new DESCryptoServiceProvider();
using (MemoryStream Stream = new MemoryStream(Convert.FromBase64String(Input)))
{
using (CryptoStream DESStream = new CryptoStream(Stream, Decryptor.CreateDecryptor(KeyArray, Key2Array), CryptoStreamMode.Read))
{
using (StreamReader Reader = new StreamReader(DESStream))
{
Text = Reader.ReadToEnd();
}
}
}
Decryptor.Clear();
return Text;
}
catch { throw; }
}
/// <summary>
/// Encrypts a string using DES
/// </summary>
/// <param name="Input">String to encrypt</param>
/// <param name="Key">Key to encrypt with (must be at least 8 bytes)</param>
/// <returns>An encrypted string</returns>
public static string Encrypt(string Input, string Key)
{
if (string.IsNullOrEmpty(Input) || string.IsNullOrEmpty(Key))
{
throw new ArgumentNullException("The input/key string can not be empty.");
}
ASCIIEncoding Encoding = new ASCIIEncoding();
byte[] KeyHashArray = Encoding.GetBytes(Key);
byte[] KeyArray = new byte[8];
byte[] Key2Array = new byte[8];
SHA1CryptoServiceProvider SHA = new SHA1CryptoServiceProvider();
byte[] Hash = SHA.ComputeHash(KeyHashArray);
SHA.Clear();
for (int x = 0; x < 8; ++x)
{
KeyArray[x] = Hash[x];
Key2Array[x] = Hash[x + 8];
}
byte[] Text = null;
DESCryptoServiceProvider Encryptor = new DESCryptoServiceProvider();
using (MemoryStream Stream = new MemoryStream())
{
using (CryptoStream DESStream = new CryptoStream(Stream, Encryptor.CreateEncryptor(KeyArray, Key2Array), CryptoStreamMode.Write))
{
using (StreamWriter Writer = new StreamWriter(DESStream))
{
Writer.Write(Input);
Writer.Flush();
DESStream.FlushFinalBlock();
Writer.Flush();
Text = Stream.GetBuffer();
}
}
}
Encryptor.Clear();
return Convert.ToBase64String(Text, 0, (int)Text.Length);
}
public static byte[] smethod_0(byte[] byte_0)
{
Class2.Stream0 stream = new Class2.Stream0(byte_0);
byte[] array = new byte[0];
int num = stream.method_1();
if (num == 67324752)
{
short num2 = (short)stream.method_0();
int num3 = stream.method_0();
int num4 = stream.method_0();
if (num == 67324752 && num2 == 20 && num3 == 0)
{
if (num4 == 8)
{
stream.method_1();
stream.method_1();
stream.method_1();
int num5 = stream.method_1();
int num6 = stream.method_0();
int num7 = stream.method_0();
if (num6 > 0)
{
byte[] buffer = new byte[num6];
stream.Read(buffer, 0, num6);
}
if (num7 > 0)
{
byte[] buffer2 = new byte[num7];
stream.Read(buffer2, 0, num7);
}
byte[] array2 = new byte[stream.Length - stream.Position];
stream.Read(array2, 0, array2.Length);
Class2.Class3 @class = new Class2.Class3(array2);
array = new byte[num5];
@class.method_2(array, 0, array.Length);
goto IL_1FF;
}
}
throw new FormatException("Wrong Header Signature");
}
int num8 = num >> 24;
num -= num8 << 24;
if (num != 8223355)
{
throw new FormatException("Unknown Header");
}
if (num8 == 1)
{
int num9 = stream.method_1();
array = new byte[num9];
int num11;
for (int i = 0; i < num9; i += num11)
{
int num10 = stream.method_1();
num11 = stream.method_1();
byte[] array3 = new byte[num10];
stream.Read(array3, 0, array3.Length);
Class2.Class3 class2 = new Class2.Class3(array3);
class2.method_2(array, i, num11);
}
}
if (num8 == 2)
{
DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider();
dESCryptoServiceProvider.Key = new byte[]
{
162,
181,
141,
204,
197,
202,
205,
58
};
dESCryptoServiceProvider.IV = new byte[]
{
83,
253,
177,
222,
83,
112,
167,
112
};
ICryptoTransform cryptoTransform = dESCryptoServiceProvider.CreateDecryptor();
byte[] byte_ = cryptoTransform.TransformFinalBlock(byte_0, 4, byte_0.Length - 4);
dESCryptoServiceProvider.Clear();
array = Class2.smethod_0(byte_);
}
IL_1FF:
stream.Close();
return array;
}
/// <summary>
/// DES�����ַ���
/// </summary>
/// <param name="decryptString">�����ܵ��ַ���</param>
/// <param name="decryptKey">������Կ,Ҫ��Ϊ8λ,�ͼ�����Կ��ͬ</param>
/// <returns>���ܳɹ����ؽ��ܺ���ַ�����ʧ�ܷ�Դ��</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);
var dcsp = new DESCryptoServiceProvider { IV = rgbIv, Key = rgbKey };
using (var mStream = new MemoryStream())
{
var cStream = new CryptoStream(mStream, dcsp.CreateDecryptor(),
CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
string s = Encoding.UTF8.GetString(mStream.ToArray());
mStream.Close();
dcsp.Clear();
return s;
}
}
catch
{
return decryptString;
}
}
/// <summary>
/// Encrypt ScopedPdu using DES encryption protocol
/// </summary>
/// <param name="unencryptedData">Unencrypted ScopedPdu byte array</param>
/// <param name="offset">Offset to start encryption</param>
/// <param name="length">Length of data to encrypt</param>
/// <param name="key">Encryption key. Key has to be at least 32 bytes is length</param>
/// <param name="engineBoots">Authoritative engine boots value</param>
/// <param name="engineTime">Authoritative engine time value. Not used for DES</param>
/// <param name="privacyParameters">Privacy parameters out buffer. This field will be filled in with information
/// required to decrypt the information. Output length of this field is 8 bytes and space has to be reserved
/// in the USM header to store this information</param>
/// <param name="authDigest">Authentication digest class reference. Not used by DES and can be null.</param>
/// <returns>Encrypted byte array</returns>
/// <exception cref="ArgumentOutOfRangeException">Thrown when encryption key is null or length of the encryption key is too short.</exception>
public byte[] Encrypt(byte[] unencryptedData, int offset, int length, byte[] key, int engineBoots, int engineTime, out byte[] privacyParameters, IAuthenticationDigest authDigest)
{
if (key == null || key.Length < MinimumKeyLength)
throw new ArgumentOutOfRangeException("encryptionKey", "Encryption key length has to 32 bytes or more.");
privacyParameters = GetSalt(engineBoots);
byte[] iv = GetIV(key, privacyParameters);
// DES uses 8 byte keys but we need 16 to encrypt ScopedPdu. Get first 8 bytes and use them as encryption key
byte[] outKey = GetKey(key);
int div = (int)Math.Floor(length / 8.0);
if ((length % 8) != 0)
div += 1;
int newLength = div * 8;
byte[] result = new byte[newLength];
byte[] buffer = new byte[newLength];
byte[] inbuffer = new byte[8];
byte[] cipherText = iv;
int posIn = 0;
int posResult = 0;
Buffer.BlockCopy(unencryptedData, offset, buffer, 0, length);
DES des = new DESCryptoServiceProvider();
des.Mode = CipherMode.ECB;
des.Padding = PaddingMode.None;
ICryptoTransform transform = des.CreateEncryptor(outKey, null);
for (int b = 0; b < div; b++)
{
for (int i = 0; i < 8; i++)
{
inbuffer[i] = (byte)(buffer[posIn] ^ cipherText[i]);
posIn++;
}
transform.TransformBlock(inbuffer, 0, inbuffer.Length, cipherText, 0);
Buffer.BlockCopy(cipherText, 0, result, posResult, cipherText.Length);
posResult += cipherText.Length;
}
des.Clear();
return result;
}
//JIAMI
public static string Encrypt(string cleartext)
{
string password2 = "Ahbool";
string cipher;
char[] key = new char[8];
if (password.Length > 8)
{
password = password.Remove(8);
}
password.CopyTo(0, key, 0, password.Length);
char[] iv = new char[8];
if (password2.Length > 8)
{
password2 = password2.Remove(8);
}
password2.CopyTo(0, iv, 0, password2.Length);
if (cleartext == null)
{
return string.Empty;
}
SymmetricAlgorithm serviceProvider = new DESCryptoServiceProvider();
serviceProvider.Key = Encoding.ASCII.GetBytes(key);
serviceProvider.IV = Encoding.ASCII.GetBytes(iv);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, serviceProvider.CreateEncryptor(), CryptoStreamMode.Write);
StreamWriter streamWriter = new StreamWriter(cryptoStream);
streamWriter.Write(cleartext);
streamWriter.Dispose();
cryptoStream.Dispose();
byte[] signData = memoryStream.ToArray();
memoryStream.Dispose();
serviceProvider.Clear();
cipher = Convert.ToBase64String(signData);
return cipher;
}
/// <summary>
/// Encrypt ScopedPdu using DES encryption protocol
/// </summary>
/// <param name="unencryptedData">Unencrypted ScopedPdu byte array</param>
/// <param name="key">Encryption key. Key has to be at least 32 bytes is length</param>
/// <param name="privacyParameters">Privacy parameters out buffer. This field will be filled in with information
/// required to decrypt the information. Output length of this field is 8 bytes and space has to be reserved
/// in the USM header to store this information</param>
/// <returns>Encrypted byte array</returns>
/// <exception cref="ArgumentOutOfRangeException">Thrown when encryption key is null or length of the encryption key is too short.</exception>
public static byte[] Encrypt(byte[] unencryptedData, byte[] key, byte[] privacyParameters)
{
if (unencryptedData == null)
{
throw new ArgumentNullException("unencryptedData");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
if (privacyParameters == null)
{
throw new ArgumentNullException("privacyParameters");
}
if (key.Length < MinimumKeyLength)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Encryption key length has to 32 bytes or more. Current: {0}", key.Length), "key");
}
var iv = GetIV(key, privacyParameters);
// DES uses 8 byte keys but we need 16 to encrypt ScopedPdu. Get first 8 bytes and use them as encryption key
var outKey = GetKey(key);
var div = (int)Math.Floor(unencryptedData.Length / 8.0);
if ((unencryptedData.Length % 8) != 0)
{
div += 1;
}
var newLength = div * 8;
var result = new byte[newLength];
var buffer = new byte[newLength];
var inbuffer = new byte[8];
var cipherText = iv;
var posIn = 0;
var posResult = 0;
Buffer.BlockCopy(unencryptedData, 0, buffer, 0, unencryptedData.Length);
using (DES des = new DESCryptoServiceProvider())
{
des.Mode = CipherMode.ECB;
des.Padding = PaddingMode.None;
using (var transform = des.CreateEncryptor(outKey, null))
{
for (var b = 0; b < div; b++)
{
for (var i = 0; i < 8; i++)
{
inbuffer[i] = (byte)(buffer[posIn] ^ cipherText[i]);
posIn++;
}
transform.TransformBlock(inbuffer, 0, inbuffer.Length, cipherText, 0);
Buffer.BlockCopy(cipherText, 0, result, posResult, cipherText.Length);
posResult += cipherText.Length;
}
}
des.Clear();
}
return result;
}
/// <summary>
/// 解密文件
/// </summary>
/// <param name="SourceFilePath">源文件路径（被解密的文件路径）</param>
/// <param name="TargetFilePath">目标文件路径（解密后生成的文件路径）</param>
/// <param name="DecryptKey">解密文件用的密钥</param>
public static void DecryptFile(string SourceFilePath, string TargetFilePath, string DecryptKey)
{
if (string.IsNullOrEmpty(SourceFilePath))
{
throw new SourceFilePathIsNullOrEmptyException();
}
FileInfo fi = new FileInfo(SourceFilePath);
if (!fi.Exists)
{
throw new SourceFileNotExistException();
}
if (fi.Length > 2048000)
{
throw new FileSizeIsGreaterThan2MException();
}
if (string.IsNullOrEmpty(TargetFilePath))
{
throw new TargetFilePathIsNullOrEmptyException();
}
if (string.IsNullOrEmpty(DecryptKey))
{
throw new EncryptKeyIsNullOrEmptyException();
}
byte[] IV = { 0x1E, 0xA2, 0x61, 0x5F, 0xD0, 0x3C, 0x99, 0xBB };//这里要与加密的相同，否则解密出来的结果会不相同。
if (DecryptKey.Length < 8)
{
DecryptKey = DecryptKey.PadRight(8, '0');
}
else if (DecryptKey.Length > 8)
{
DecryptKey = DecryptKey.Remove(8);
}
byte[] byKey = null;
byKey = Encoding.UTF8.GetBytes(DecryptKey.Substring(0, 8));
using (FileStream fsSource = new FileStream(SourceFilePath, FileMode.Open, FileAccess.Read))
{
using (MemoryStream ms = new MemoryStream())
{
byte[] bSource = new byte[100];
long readLength = 0;
long writeLength = fsSource.Length;
int iLength = 0;
DES des = new DESCryptoServiceProvider();
try
{
using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write))
{
while (readLength < writeLength)
{
iLength = fsSource.Read(bSource, 0, bSource.Length);
cs.Write(bSource, 0, iLength);
readLength = readLength + iLength;
}
cs.FlushFinalBlock();
using (FileStream fsTarget = new FileStream(TargetFilePath, FileMode.OpenOrCreate, FileAccess.Write))
{
ms.WriteTo(fsTarget);
fsTarget.Close();
}
cs.Clear();
cs.Close();
}
}
catch (CryptographicException)
{
throw new DecryptErrorException();
}
des.Clear();
ms.Close();
}
fsSource.Close();
}
}
private static string DESEncrypt(byte[] buffer, byte[] rgbKey, byte[] rgbIV)
{
string encrypt = null;
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
try
{
using (MemoryStream mStream = new MemoryStream())
{
using (CryptoStream cStream = new CryptoStream(mStream, des.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
{
cStream.Write(buffer, 0, buffer.Length);
cStream.FlushFinalBlock();
encrypt = Convert.ToBase64String(mStream.ToArray());
}
}
}
catch { }
des.Clear();
return encrypt;
}
/// <summary>
/// DES 加密(数据加密标准，速度较快，适用于加密大量数据的场合）
/// </summary>
/// <param name="encryptString">待加密的明文</param>
/// <param name="encryptKey">加密的密钥,必须为8位</param>
/// <returns>加密后的密文</returns>
public static string DESEncrypt(string encryptString, string encryptKey)
{
if (string.IsNullOrEmpty(encryptString))
{
throw (new Exception("明文不得为空！"));
}
if (string.IsNullOrEmpty(encryptKey))
{
throw (new Exception("密钥不得为空！"));
}
if (encryptKey.Length != 8)
{
throw new Exception("密钥必须为8位");
}
byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
string m_strEncrypt = "";
var m_DESProvider = new DESCryptoServiceProvider();
try
{
byte[] m_btencryptString = Encoding.Default.GetBytes(encryptString);
using (var m_stream = new MemoryStream())
{
using (var m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateEncryptor(Encoding.Default.GetBytes(encryptKey), m_btIV), CryptoStreamMode.Write))
{
m_cstream.Write(m_btencryptString, 0, m_btencryptString.Length);
m_cstream.FlushFinalBlock();
m_strEncrypt = Convert.ToBase64String(m_stream.ToArray());
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
m_DESProvider.Clear();
}
return m_strEncrypt;
}
public void EncryptData(string inName, string outName)
{
FileStream fileStream = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fileStream.SetLength(0L);
this.desKey[0] = (byte) 20;
this.desKey[1] = (byte) 157;
this.desKey[2] = (byte) 64;
this.desKey[3] = (byte) 213;
this.desKey[4] = (byte) 193;
this.desKey[5] = (byte) 46;
this.desKey[6] = (byte) 85;
this.desKey[7] = (byte) 2;
this.desIV[0] = (byte) 0;
this.desIV[1] = (byte) 0;
this.desIV[2] = (byte) 0;
this.desIV[3] = (byte) 0;
this.desIV[4] = (byte) 0;
this.desIV[5] = (byte) 0;
this.desIV[6] = (byte) 0;
this.desIV[7] = (byte) 0;
byte[] buffer = new byte[8];
long num1 = 8L;
long num2 = (long) inName.Length;
DESCryptoServiceProvider cryptoServiceProvider = new DESCryptoServiceProvider();
cryptoServiceProvider.Mode = CipherMode.CBC;
cryptoServiceProvider.Padding = PaddingMode.None;
CryptoStream cryptoStream = new CryptoStream((Stream) fileStream, cryptoServiceProvider.CreateEncryptor(this.desKey, this.desIV), CryptoStreamMode.Write);
this.i = 0;
do
{
buffer[this.i] = checked ((byte) Strings.Asc(Strings.Mid(inName, this.i + 1, 1)));
checked { ++this.i; }
}
while (this.i <= 7);
for (; num1 <= num2; {
int count;
num1 = (long) Convert.ToInt32((double) num1 + (double) count / (double) cryptoServiceProvider.BlockSize * (double) cryptoServiceProvider.BlockSize);
}
)
{
count = 8;
cryptoStream.Write(buffer, 0, count);
}
cryptoStream.Close();
fileStream.Close();
cryptoStream.Clear();
cryptoServiceProvider.Clear();
try
{
this.DES_file_name = FileSystem.CurDir() + "\\Password.dat";
FileInfo fileInfo = new FileInfo(this.DES_file_name);
if (!fileInfo.Exists)
{
int num3 = (int) Interaction.MsgBox((object) ("DES output file : " + this.DES_file_name + " does not exist in the local directory"), MsgBoxStyle.OkOnly, (object) null);
}
this.DES_file_number = FileSystem.FreeFile();
this.DES_file_buffer_len = checked ((int) fileInfo.Length);
FileSystem.FileOpen(this.DES_file_number, this.DES_file_name, OpenMode.Binary, OpenAccess.Read, OpenShare.Default, this.DES_file_buffer_len);
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
int num3 = (int) Interaction.MsgBox((object) ("Unable to open DES output file " + this.DES_file_name), MsgBoxStyle.OkOnly, (object) null);
ProjectData.ClearProjectError();
}
try
{
FileSystem.FileGet(this.DES_file_number, ref this.DES_file_string_bytes, -1L, false);
this.DESBox.Text = "";
MainForm mainForm = this;
int num3 = 0;
int num4 = checked (this.DES_file_buffer_len - 2);
mainForm.i = num3;
while (this.i <= num4)
{
if (Strings.Len(Conversion.Hex(Strings.Asc(Strings.Mid(this.DES_file_string_bytes, checked (this.i + 1), 1)))) == 2)
{
TextBox desBox = this.DESBox;
desBox.Text = desBox.Text + Conversion.Hex(Strings.Asc(Strings.Mid(this.DES_file_string_bytes, checked (this.i + 1), 1))) + ".";
}
else
{
TextBox desBox = this.DESBox;
desBox.Text = desBox.Text + "0" + Conversion.Hex(Strings.Asc(Strings.Mid(this.DES_file_string_bytes, checked (this.i + 1), 1))) + ".";
}
checked { ++this.i; }
}
if (Strings.Len(Conversion.Hex(Strings.Asc(Strings.Mid(this.DES_file_string_bytes, this.DES_file_buffer_len, 1)))) == 2)
{
TextBox desBox = this.DESBox;
desBox.Text = desBox.Text + Conversion.Hex(Strings.Asc(Strings.Mid(this.DES_file_string_bytes, this.DES_file_buffer_len, 1)));
}
else
{
TextBox desBox = this.DESBox;
desBox.Text = desBox.Text + "0" + Conversion.Hex(Strings.Asc(Strings.Mid(this.DES_file_string_bytes, this.DES_file_buffer_len, 1)));
}
try
{
FileSystem.FileClose(new int[1]
{
this.DES_file_number
});
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
int num5 = (int) Interaction.MsgBox((object) ("Unable to close DES encoded output file " + this.DES_file_name), MsgBoxStyle.OkOnly, (object) null);
ProjectData.ClearProjectError();
}
}
catch (Exception ex1)
{
ProjectData.SetProjectError(ex1);
int num3 = (int) Interaction.MsgBox((object) ("Error reading password file " + this.DES_file_name), MsgBoxStyle.OkOnly, (object) null);
try
{
FileSystem.FileClose(new int[1]
{
this.DES_file_number
});
}
catch (Exception ex2)
{
ProjectData.SetProjectError(ex2);
int num4 = (int) Interaction.MsgBox((object) ("Unable to close DES encoded password file " + this.DES_file_name), MsgBoxStyle.OkOnly, (object) null);
ProjectData.ClearProjectError();
}
ProjectData.ClearProjectError();
}
if (this.SaveSeedCheckBox.Checked)
return;
try
{
FileSystem.Kill(this.DES_file_name);
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
ProjectData.ClearProjectError();
}
}
public void DecryptData(string inName, string outName)
{
FileStream fileStream1 = new FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream fileStream2 = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fileStream2.SetLength(0L);
this.desKey[0] = (byte) 20;
this.desKey[1] = (byte) 157;
this.desKey[2] = (byte) 64;
this.desKey[3] = (byte) 213;
this.desKey[4] = (byte) 193;
this.desKey[5] = (byte) 46;
this.desKey[6] = (byte) 85;
this.desKey[7] = (byte) 2;
this.desIV[0] = (byte) 0;
this.desIV[1] = (byte) 0;
this.desIV[2] = (byte) 0;
this.desIV[3] = (byte) 0;
this.desIV[4] = (byte) 0;
this.desIV[5] = (byte) 0;
this.desIV[6] = (byte) 0;
this.desIV[7] = (byte) 0;
byte[] numArray = new byte[8];
long num = 8L;
long length = fileStream1.Length;
DESCryptoServiceProvider cryptoServiceProvider = new DESCryptoServiceProvider();
cryptoServiceProvider.Mode = CipherMode.CBC;
cryptoServiceProvider.Padding = PaddingMode.None;
CryptoStream cryptoStream = new CryptoStream((Stream) fileStream2, cryptoServiceProvider.CreateDecryptor(this.desKey, this.desIV), CryptoStreamMode.Write);
for (; num <= length; {
int count;
num = (long) Convert.ToInt32((double) num + (double) count / (double) cryptoServiceProvider.BlockSize * (double) cryptoServiceProvider.BlockSize);
}
)
{
count = fileStream1.Read(numArray, 0, 8);
cryptoStream.Write(numArray, 0, count);
}
cryptoStream.Close();
fileStream1.Close();
fileStream2.Close();
cryptoStream.Clear();
cryptoServiceProvider.Clear();
}
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="strSource">被加密的字符串</param>
/// <param name="EncryptKey">加密用的密钥（8位加密KEY，同解密用的密钥相同）</param>
/// <returns>加密后的字符串</returns>
public static string EncryptedString(string strSource, string EncryptKey)
{
if (string.IsNullOrEmpty(strSource))
{
throw new SourceIsNullOrEmptyException();
}
if (string.IsNullOrEmpty(EncryptKey))
{
throw new EncryptKeyIsNullOrEmptyException();
}
byte[] IV = { 0x1E, 0xA2, 0x61, 0x5F, 0xD0, 0x3C, 0x99, 0xBB };//这里要与解密的相同，否则解密出来的结果会不相同。
if (EncryptKey.Length < 8)
{
EncryptKey = EncryptKey.PadRight(8, '0');
}
else if (EncryptKey.Length > 8)
{
EncryptKey = EncryptKey.Remove(8);
}
byte[] byKey = null;
byKey = Encoding.UTF8.GetBytes(EncryptKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] sourceByteArray = Encoding.UTF8.GetBytes(strSource);
string strEncryptString = string.Empty;
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write))
{
cs.Write(sourceByteArray, 0, sourceByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
strEncryptString = Convert.ToBase64String(ms.ToArray());
}
des.Clear();
return strEncryptString;
}
////////////////////Encrypt Function////////////////////
private static byte[] Encrypt(byte[] plainData, string sKey)
{
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
DES.IV = DES.Key;
ICryptoTransform desEncrypt = DES.CreateEncryptor();
Byte[] encryptedData = desEncrypt.TransformFinalBlock(plainData, 0, plainData.Length);
DES.Clear();
desEncrypt.Dispose();
return encryptedData;
}
/// <summary>
/// Decrypt DES encrypted ScopedPdu
/// </summary>
/// <param name="encryptedData">Source data buffer</param>
/// <param name="key">Decryption key. Key length has to be 32 bytes in length or longer (bytes beyond 32 bytes are ignored).</param>
/// <param name="privacyParameters">Privacy parameters extracted from USM header</param>
/// <returns>Decrypted byte array</returns>
/// <exception cref="ArgumentNullException">Thrown when encrypted data is null or length == 0</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown when encryption key length is less then 32 byte or if privacy parameters
/// argument is null or length other then 8 bytes</exception>
public static byte[] Decrypt(byte[] encryptedData, byte[] key, byte[] privacyParameters)
{
if (encryptedData == null)
{
throw new ArgumentNullException("encryptedData");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
if (privacyParameters == null)
{
throw new ArgumentNullException("privacyParameters");
}
if (encryptedData.Length == 0)
{
throw new ArgumentException("empty encrypted data", "encryptedData");
}
if ((encryptedData.Length % 8) != 0)
{
throw new ArgumentException("Encrypted data buffer has to be divisible by 8.", "encryptedData");
}
if (privacyParameters.Length != PrivacyParametersLength)
{
throw new ArgumentOutOfRangeException("privacyParameters", "Privacy parameters argument has to be 8 bytes long");
}
if (key.Length < MinimumKeyLength)
{
throw new ArgumentOutOfRangeException("key", "Decryption key has to be at least 16 bytes long.");
}
var iv = new byte[8];
for (var i = 0; i < 8; ++i)
{
iv[i] = (byte)(key[8 + i] ^ privacyParameters[i]);
}
using (DES des = new DESCryptoServiceProvider())
{
des.Mode = CipherMode.CBC;
des.Padding = PaddingMode.Zeros;
// .NET implementation only takes an 8 byte key
var outKey = new byte[8];
Buffer.BlockCopy(key, 0, outKey, 0, 8);
des.Key = outKey;
des.IV = iv;
using (var transform = des.CreateDecryptor())
{
var decryptedData = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
des.Clear();
return decryptedData;
}
}
}
public static string Encrypt(string orgidata, byte[] key = null, CryptoStringFormat format = CryptoStringFormat.Base64, string iv = null)
{
if (orgidata == null)
{
return null;
}
try
{
byte[] orgi = Encoding.GetBytes(orgidata);
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
{
des.Key = GetCheckKey(key);
des.IV = string.IsNullOrEmpty(iv) ? _iv : Encoding.GetBytes(iv);
using (ICryptoTransform transform = des.CreateEncryptor())
{
byte[] data = transform.TransformFinalBlock(orgi, 0, orgi.Length);
if (data != null)
{
des.Clear();
switch (format)
{
case CryptoStringFormat.Base64:
return Convert.ToBase64String(data);
case CryptoStringFormat.Encoding:
return Encoding.GetString(data);
}
}
}
}
orgi = null;
}
catch (Exception ex)
{
Log.WriteException(ex);
}
return null;
}
static byte[] Compute_LM (string password, byte[] challenge)
{
var buffer = new byte [21];
// create Lan Manager password
#if MOONLIGHT
DESCryptoServiceProvider des = new DESCryptoServiceProvider ();
#else
DES des = DES.Create ();
#endif
des.Mode = CipherMode.ECB;
ICryptoTransform ct = null;
// Note: In .NET DES cannot accept a weak key
// this can happen for a null password
if ((password == null) || (password.Length < 1)) {
Buffer.BlockCopy (nullEncMagic, 0, buffer, 0, 8);
} else {
des.Key = PasswordToKey (password, 0);
ct = des.CreateEncryptor ();
ct.TransformBlock (magic, 0, 8, buffer, 0);
}
// and if a password has less than 8 characters
if ((password == null) || (password.Length < 8)) {
Buffer.BlockCopy (nullEncMagic, 0, buffer, 8, 8);
} else {
des.Key = PasswordToKey (password, 7);
ct = des.CreateEncryptor ();
ct.TransformBlock (magic, 0, 8, buffer, 8);
}
des.Clear ();
return GetResponse (challenge, buffer);
}
/// <summary>
/// Decrypts a string using a given private key and the DES algorithm
/// </summary>
/// <param name="strCipherText">Text to be decrypted</param>
/// <param name="privateKey">Private Key used to decrypt</param>
/// <returns>Decrypted Text</returns>
/// <remarks>The parameter must be 8 characters long</remarks>
private static string DESPrivateKeyDecryption(string strCipherText, string privateKey)
{
DESCryptoServiceProvider crp = new DESCryptoServiceProvider();
UnicodeEncoding uEncode = new UnicodeEncoding();
MemoryStream stmPlainText = new MemoryStream();
byte[] bytCipherText;
byte[] slt = new byte[0];
byte[] bytDerivedKey;
bytCipherText = Convert.FromBase64String(strCipherText);
MemoryStream stmCipherText = new MemoryStream(bytCipherText);
crp.KeySize = DES_KEY_SIZE;
PasswordDeriveBytes pdb = new PasswordDeriveBytes(privateKey, slt);
bytDerivedKey = pdb.GetBytes(8);
crp.Key = bytDerivedKey;
crp.IV = pdb.GetBytes(8);
CryptoStream csDecrypted = new CryptoStream(stmCipherText, crp.CreateDecryptor(), CryptoStreamMode.Read);
StreamWriter sw = new StreamWriter(stmPlainText);
StreamReader sr = new StreamReader(csDecrypted);
sw.Write(sr.ReadToEnd());
sw.Flush();
csDecrypted.Clear();
crp.Clear();
return uEncode.GetString(stmPlainText.ToArray());
}
/// <summary>
/// DES 解密(数据加密标准，速度较快，适用于加密大量数据的场合)
/// </summary>
/// <param name="DecryptString">待解密的密文</param>
/// <param name="DecryptKey">解密的密钥</param>
/// <returns>returns</returns>
public static string DESDecrypt(string DecryptString, string DecryptKey)
{
if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); }
if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); }
if (DecryptKey.Length != 8) { throw (new Exception("密钥必须为8位")); }
byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
string m_strDecrypt = "";
DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider();
try
{
byte[] m_btDecryptString = Convert.FromBase64String(DecryptString);
MemoryStream m_stream = new MemoryStream();
CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write);
m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length);
m_cstream.FlushFinalBlock();
m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray());
m_stream.Close(); m_stream.Dispose();
m_cstream.Close(); m_cstream.Dispose();
}
catch (IOException ex) { throw ex; }
catch (CryptographicException ex) { throw ex; }
catch (ArgumentException ex) { throw ex; }
catch (Exception ex) { throw ex; }
finally { m_DESProvider.Clear(); }
return m_strDecrypt;
}
/// <summary>
/// Decrypt DES encrypted ScopedPdu
/// </summary>
/// <param name="encryptedData">Source data buffer</param>
/// <param name="offset">Offset within the buffer to start decryption process</param>
/// <param name="length">Length of data to decrypt</param>
/// <param name="key">Decryption key. Key length has to be 32 bytes in length or longer (bytes beyond 32 bytes are ignored).</param>
/// <param name="engineBoots">Authoritative engine boots value</param>
/// <param name="engineTime">Authoritative engine time value</param>
/// <param name="privacyParameters">Privacy parameters extracted from USM header</param>
/// <returns>Decrypted byte array</returns>
/// <exception cref="ArgumentNullException">Thrown when encrypted data is null or length == 0</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown when encryption key length is less then 32 byte or if privacy parameters
/// argument is null or length other then 8 bytes</exception>
public byte[] Decrypt(byte[] encryptedData, int offset, int length, byte[] key, int engineBoots, int engineTime, byte[] privacyParameters)
{
if ((length % 8) != 0)
throw new ArgumentOutOfRangeException("encryptedData", "Encrypted data buffer has to be divisible by 8.");
if (encryptedData == null || encryptedData.Length == 0)
throw new ArgumentNullException("cryptedData");
if (privacyParameters == null || privacyParameters.Length != PrivacyParametersLength)
throw new ArgumentOutOfRangeException("privacyParameters", "Privacy parameters argument has to be 8 bytes long");
if (key == null || key.Length < MinimumKeyLength)
throw new ArgumentOutOfRangeException("decryptionKey", "Decryption key has to be at least 16 bytes long.");
byte[] iv = new byte[8];
for (int i = 0; i < 8; ++i)
{
iv[i] = (byte)(key[8 + i] ^ privacyParameters[i]);
}
DES des = new DESCryptoServiceProvider();
des.Mode = CipherMode.CBC;
des.Padding = PaddingMode.Zeros;
// .NET implementation only takes an 8 byte key
byte[] outKey = new byte[8];
Buffer.BlockCopy(key, 0, outKey, 0, 8);
des.Key = outKey;
des.IV = iv;
ICryptoTransform transform = des.CreateDecryptor();
byte[] decryptedData = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
des.Clear();
return decryptedData;
}
