#region MD5 加密
/// <summary>
/// MD5加密静态方法
/// </summary>
/// <param name="EncryptString">待加密的密文</param>
/// <returns></returns>
public static string MD5Encrypt(string EncryptString)
{
if (string.IsNullOrEmpty(EncryptString))
{
throw (new Exception("密文不得为空"));
}
MD5 m_ClassMD5 = new MD5CryptoServiceProvider();
string m_strEncrypt = "";
try
{
m_strEncrypt = BitConverter.ToString(m_ClassMD5.ComputeHash(Encoding.Default.GetBytes(EncryptString))).Replace("-", "");
}
catch (ArgumentException ex) { throw ex; }
catch (CryptographicException ex) { throw ex; }
catch (Exception ex) { throw ex; }
finally {
m_ClassMD5.Clear();
}
return m_strEncrypt;
}
#endregion
#region DES 加密解密 可以自己设定
private static string DesKey = "wanwanzz";
/// <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">待加密的密文</param>
/// <returns></returns>
public static string DESEncrypt(string EncryptString)
{
if (string.IsNullOrEmpty(EncryptString))
{
throw (new Exception("密文不得为空"));
}
if (string.IsNullOrEmpty(DesKey))
{
throw (new Exception("密钥不得为空"));
}
if (DesKey.Length!=8)
{
throw (new Exception("密钥必须为8位"));
}
//定义偏移量
byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
string m_strEncrypt = "";
DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider();
try
{
byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString);
MemoryStream m_stream = new MemoryStream();
CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateEncryptor(Encoding.Default.GetBytes(DesKey), m_btIV), CryptoStreamMode.Write);
m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length);
m_cstream.FlushFinalBlock();
m_strEncrypt = Convert.ToBase64String(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_strEncrypt;
}
/// <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"></param>
/// <returns></returns>
public static string DESDecrypt(string DecryptString)
{
if (string.IsNullOrEmpty(DecryptString))
{
throw (new Exception("密文不得为空"));
}
if (string.IsNullOrEmpty(DesKey))
{
throw (new Exception("密钥不得为空"));
}
if (DesKey.Length != 8)
{
throw (new Exception("密钥必须为9位"));
}
byte[] m_btIV = { 0x12,0x34,0x56,0x78,0x90,0xAB,0xCD,0xEF};
string m_strDecrpty = "";
DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider();
try
{
byte[] m_btDecrptyString = Convert.FromBase64String(DecryptString);
MemoryStream m_stream = new MemoryStream();
CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateDecryptor(Encoding.Default.GetBytes(DesKey), m_btIV), CryptoStreamMode.Write);
m_cstream.Write(m_btDecrptyString, 0, m_btDecrptyString.Length);
m_cstream.FlushFinalBlock();
m_strDecrpty = 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; }
return m_strDecrpty;
}
#endregion
#region MD5加密解密
/// <summary>
/// MD5加密
/// </summary>
/// <param name="strSource">需要加密的字符串</param>
/// <returns>MD5加密后的字符串</returns>
public static string Md5Encrypt(string strSource)
{
//把字符串放到byte数组中
byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
//建立加密对象的密钥和偏移量
byte[] iv = { 102, 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
//实例DES加密类
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = iv;
mobjCryptoService.IV = key;
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
//实例MemoryStream流加密密文件
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
return System.Convert.ToBase64String(ms.ToArray());
}
#endregion
#region MD5解密
/// <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 static 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 = { 102, 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();
}
#endregion
