这个类是关于加密，解密的操作，文件的一些高级操作
1.MySecurity 加密字符串
2.MySecurity 加密字符串 密钥为系统默认 0123456789
3.MySecurity 加密文件
4.MySecurity 解密字符串
5.MySecurity 解密文件
6.MySecurity MD5加密
7.MySecurity Base64加密
8.MySecurity Base64解密
/// <summary>
/// 类说明：Assistant
/// 编 码 人：苏飞
/// 联系方式：361983679
/// 更新网站：[url=http://www.cckan.net/thread-655-1-1.html]http://www.cckan.net/thread-655-1-1.html[/url]
/// </summary>
using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using System.Text.RegularExpressions;
using System.Collections; namespace DotNet.Utilities
{
/// <summary>
/// MySecurity(安全类) 的摘要说明。
/// </summary>
public class MySecurity
{
/// <summary>
/// 初始化安全类
/// </summary>
public MySecurity()
{
///默认密码
key = "";
}
private string key; //默认密钥 private byte[] sKey;
private byte[] sIV; #region 加密字符串
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="inputStr">输入字符串</param>
/// <param name="keyStr">密码，可以为“”</param>
/// <returns>输出加密后字符串</returns>
static public string SEncryptString(string inputStr, string keyStr)
{
MySecurity ws = new MySecurity();
return ws.EncryptString(inputStr, keyStr);
}
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="inputStr">输入字符串</param>
/// <param name="keyStr">密码，可以为“”</param>
/// <returns>输出加密后字符串</returns>
public string EncryptString(string inputStr, string keyStr)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
if (keyStr == "")
keyStr = key;
byte[] inputByteArray = Encoding.Default.GetBytes(inputStr);
byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
SHA1 ha = new SHA1Managed();
byte[] hb = ha.ComputeHash(keyByteArray);
sKey = new byte[];
sIV = new byte[];
for (int i = ; i < ; i++)
[i] sKey = hb;
for (int i = ; i < ; i++)
sIV[i - ] = hb;
des.Key = sKey;
des.IV = sIV;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, , inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
cs.Close();
ms.Close();
return ret.ToString();
}
#endregion #region 加密字符串 密钥为系统默认 0123456789
/// <summary>
/// 加密字符串 密钥为系统默认
/// </summary>
/// <param name="inputStr">输入字符串</param>
/// <returns>输出加密后字符串</returns>
static public string SEncryptString(string inputStr)
{
MySecurity ws = new MySecurity();
return ws.EncryptString(inputStr, "");
}
#endregion #region 加密文件
/// <summary>
/// 加密文件
/// </summary>
/// <param name="filePath">输入文件路径</param>
/// <param name="savePath">加密后输出文件路径</param>
/// <param name="keyStr">密码，可以为“”</param>
/// <returns></returns>
public bool EncryptFile(string filePath, string savePath, string keyStr)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
if (keyStr == "")
keyStr = key;
FileStream fs = File.OpenRead(filePath);
byte[] inputByteArray = new byte[fs.Length];
fs.Read(inputByteArray, , (int)fs.Length);
fs.Close();
byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
SHA1 ha = new SHA1Managed();
byte[] hb = ha.ComputeHash(keyByteArray);
sKey = new byte[];
sIV = new byte[];
for (int i = ; i < ; i++)
sKey = hb;
for (int i = ; i < ; i++)
sIV[i - ] = hb;
des.Key = sKey;
des.IV = sIV;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, , inputByteArray.Length);
cs.FlushFinalBlock();
fs = File.OpenWrite(savePath);
foreach (byte b in ms.ToArray())
{
fs.WriteByte(b);
}
fs.Close();
cs.Close();
ms.Close();
return true;
}
#endregion #region 解密字符串
/// <summary>
/// 解密字符串
/// </summary>
/// <param name="inputStr">要解密的字符串</param>
/// <param name="keyStr">密钥</param>
/// <returns>解密后的结果</returns>
static public string SDecryptString(string inputStr, string keyStr)
{
MySecurity ws = new MySecurity();
return ws.DecryptString(inputStr, keyStr);
}
/// <summary>
/// 解密字符串 密钥为系统默认
/// </summary>
/// <param name="inputStr">要解密的字符串</param>
/// <returns>解密后的结果</returns>
static public string SDecryptString(string inputStr)
{
MySecurity ws = new MySecurity();
return ws.DecryptString(inputStr, "");
}
/// <summary>
/// 解密字符串
/// </summary>
/// <param name="inputStr">要解密的字符串</param>
/// <param name="keyStr">密钥</param>
/// <returns>解密后的结果</returns>
public string DecryptString(string inputStr, string keyStr)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
if (keyStr == "")
keyStr = key;
byte[] inputByteArray = new byte[inputStr.Length / ];
for (int x = ; x < inputStr.Length / ; x++)
{
int i = (Convert.ToInt32(inputStr.Substring(x * , ), ));
inputByteArray[x] = (byte)i;
}
byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
SHA1 ha = new SHA1Managed();
byte[] hb = ha.ComputeHash(keyByteArray);
sKey = new byte[];
sIV = new byte[];
for (int i = ; i < ; i++)
sKey = hb;
for (int i = ; i < ; i++)
sIV[i - ] = hb;
des.Key = sKey;
des.IV = sIV;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, , inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
#endregion #region 解密文件
/// <summary>
/// 解密文件
/// </summary>
/// <param name="filePath">输入文件路径</param>
/// <param name="savePath">解密后输出文件路径</param>
/// <param name="keyStr">密码，可以为“”</param>
/// <returns></returns>
public bool DecryptFile(string filePath, string savePath, string keyStr)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
if (keyStr == "")
keyStr = key;
FileStream fs = File.OpenRead(filePath);
byte[] inputByteArray = new byte[fs.Length];
fs.Read(inputByteArray, , (int)fs.Length);
fs.Close();
byte[] keyByteArray = Encoding.Default.GetBytes(keyStr);
SHA1 ha = new SHA1Managed();
byte[] hb = ha.ComputeHash(keyByteArray);
sKey = new byte[];
sIV = new byte[];
for (int i = ; i < ; i++)
sKey = hb;
for (int i = ; i < ; i++)
sIV[i - ] = hb;
des.Key = sKey;
des.IV = sIV;
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, , inputByteArray.Length);
cs.FlushFinalBlock();
fs = File.OpenWrite(savePath);
foreach (byte b in ms.ToArray())
{
fs.WriteByte(b);
}
fs.Close();
cs.Close();
ms.Close();
return true;
}
#endregion #region MD5加密
/// <summary>
/// 128位MD5算法加密字符串
/// </summary>
/// <param name="text">要加密的字符串</param>
public static string MD5(string text)
{ //如果字符串为空，则返回
if (Tools.IsNullOrEmpty<string>(text))
{
return "";
}
//返回MD5值的字符串表示
return MD5(text);
} /// <summary>
/// 128位MD5算法加密Byte数组
/// </summary>
/// <param name="data">要加密的Byte数组</param>
public static string MD5(byte[] data)
{
//如果Byte数组为空，则返回
if (Tools.IsNullOrEmpty<byte[]>(data))
{
return "";
} try
{
//创建MD5密码服务提供程序
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); //计算传入的字节数组的哈希值
byte[] result = md5.ComputeHash(data); //释放资源
md5.Clear(); //返回MD5值的字符串表示
return Convert.ToBase64String(result);
}
catch
{ //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
return "";
}
}
#endregion #region Base64加密
/// <summary>
/// Base64加密
/// </summary>
/// <param name="text">要加密的字符串</param>
/// <returns></returns>
public static string EncodeBase64(string text)
{
//如果字符串为空，则返回
if (Tools.IsNullOrEmpty<string>(text))
{
return "";
} try
{
char[] Base64Code = new char[]{'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T',
'U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n',
'o','p','q','r','s','t','u','v','w','x','y','z','','','','','','','','',
'','','+','/','='};
byte empty = (byte);
ArrayList byteMessage = new ArrayList(Encoding.Default.GetBytes(text));
StringBuilder outmessage;
int messageLen = byteMessage.Count;
int page = messageLen / ;
int use = ;
if ((use = messageLen % ) > )
{
for (int i = ; i < - use; i++)
byteMessage.Add(empty);
page++;
}
outmessage = new System.Text.StringBuilder(page * );
for (int i = ; i < page; i++)
{
byte[] instr = new byte[];
instr[] = (byte)byteMessage[i * ];
instr[] = (byte)byteMessage[i * + ];
instr[] = (byte)byteMessage[i * + ];
int[] outstr = new int[];
outstr[] = instr[] >> ;
outstr[] = ((instr[] & 0x03) << ) ^ (instr[] >> );
if (!instr[].Equals(empty))
outstr[] = ((instr[] & 0x0f) << ) ^ (instr[] >> );
else
outstr[] = ;
if (!instr[].Equals(empty))
outstr[] = (instr[] & 0x3f);
else
outstr[] = ;
outmessage.Append(Base64Code[outstr[]]);
outmessage.Append(Base64Code[outstr[]]);
outmessage.Append(Base64Code[outstr[]]);
outmessage.Append(Base64Code[outstr[]]);
}
return outmessage.ToString();
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region Base64解密
/// <summary>
/// Base64解密
/// </summary>
/// <param name="text">要解密的字符串</param>
public static string DecodeBase64(string text)
{
//如果字符串为空，则返回
if (Tools.IsNullOrEmpty<string>(text))
{
return "";
} //将空格替换为加号
text = text.Replace(" ", "+"); try
{
if ((text.Length % ) != )
{
return "包含不正确的BASE64编码";
}
if (!Regex.IsMatch(text, "^[A-Z0-9/+=]*$", RegexOptions.IgnoreCase))
{
return "包含不正确的BASE64编码";
}
string Base64Code = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
int page = text.Length / ;
ArrayList outMessage = new ArrayList(page * );
char[] message = text.ToCharArray();
for (int i = ; i < page; i++)
{
byte[] instr = new byte[];
instr[] = (byte)Base64Code.IndexOf(message[i * ]);
instr[] = (byte)Base64Code.IndexOf(message[i * + ]);
instr[] = (byte)Base64Code.IndexOf(message[i * + ]);
instr[] = (byte)Base64Code.IndexOf(message[i * + ]);
byte[] outstr = new byte[];
outstr[] = (byte)((instr[] << ) ^ ((instr[] & 0x30) >> ));
if (instr[] != )
{
outstr[] = (byte)((instr[] << ) ^ ((instr[] & 0x3c) >> ));
}
else
{
outstr[] = ;
}
if (instr[] != )
{
outstr[] = (byte)((instr[] << ) ^ instr[]);
}
else
{
outstr[] = ;
}
outMessage.Add(outstr[]);
if (outstr[] != )
outMessage.Add(outstr[]);
if (outstr[] != )
outMessage.Add(outstr[]);
}
byte[] outbyte = (byte[])outMessage.ToArray(Type.GetType("System.Byte"));
return Encoding.Default.GetString(outbyte);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion
}
}