asp.net中字符串加密,解密函数小结
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Text;
/// <summary>
///StrOperation 的摘要说明
/// </summary>
public class StrOperation
{
public StrOperation()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
private static string De(string strCookie, int type)
{
string str;
if ((type % 2) == 0)
{
str = DeTransform1(strCookie);
}
else
{
str = DeTransform3(strCookie);
}
return Transform2(strCookie);
}
//转换字符(Reverse)
public static string Decode(string str)
{
str = str.Replace("<br>", "\n");
str = str.Replace(">", ">");
str = str.Replace("<", "<");
str = str.Replace(" ", " ");
str = str.Replace(""", "\"");
return str;
}
//解密
public static string Decrypt(string Passowrd)
{
return FormsAuthentication.Decrypt(Passowrd).Name.ToString();
}
//解密方式一
public static string DeTransform1(string str)
{
int i = 0;
StringBuilder sb = new StringBuilder();
foreach (char a in str)
{
switch ((i % 6))
{
case 0:
sb.Append((char)(a - '\x0001'));
break;
case 1:
sb.Append((char)(a - '\x0005'));
break;
case 2:
sb.Append((char)(a - '\a'));
break;
case 3:
sb.Append((char)(a - '\x0002'));
break;
case 4:
sb.Append((char)(a - '\x0004'));
break;
case 5:
sb.Append((char)(a - '\t'));
break;
}
i++;
}
return sb.ToString();
}
//加密方式三
public static string DeTransform3(string str)
{
int i = 0;
StringBuilder sb = new StringBuilder();
foreach (char a in str)
{
switch ((i % 6))
{
case 0:
sb.Append((char)(a - '\x0003'));
break;
case 1:
sb.Append((char)(a - '\x0006'));
break;
case 2:
sb.Append((char)(a - '\b'));
break;
case 3:
sb.Append((char)(a - '\a'));
break;
case 4:
sb.Append((char)(a - '\x0005'));
break;
case 5:
sb.Append((char)(a - '\x0002'));
break;
}
i++;
}
return sb.ToString();
}
private static string En(string strCookie, int type)
{
string str;
if ((type % 2) == 0)
{
str = Transform1(strCookie);
}
else
{
str = Transform3(strCookie);
}
return Transform2(strCookie);
}
//转换字符
public static string Encode(string str)
{
str = str.Replace("&", "&");
str = str.Replace("'", "''");
str = str.Replace("\"", """);
str = str.Replace(" ", " ");
str = str.Replace("<", "<");
str = str.Replace(">", ">");
str = str.Replace("\n", "<br>");
return str;
}
//加密
public static string Encrypt(string Password)
{
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(Password, true, 2);
return FormsAuthentication.Encrypt(ticket).ToString();
}
//SHA1加密,MD5加密
public static string Encrypt(string Password, int Format)
{
switch (Format)
{
case 0:
return FormsAuthentication.HashPasswordForStoringInConfigFile(Password, "SHA1");
case 1:
return FormsAuthentication.HashPasswordForStoringInConfigFile(Password, "MD5");
}
return "";
}
public static string EncryptCookie(string strCookie, int type)
{
string str = En(strCookie, type);
StringBuilder sb = new StringBuilder();
foreach (char a in str)
{
sb.Append(Convert.ToString((int)a, 0x10).PadLeft(4, '0'));
}
return sb.ToString();
}
//反转字符
public static string Reverse(string str)
{
StringBuilder sb = new StringBuilder();
for (int i = str.Length - 1; i >= 0; i--)
{
sb.Append(str[i]);
}
return sb.ToString();
}
//解密方式一
public static string Transform1(string str)
{
int i = 0;
StringBuilder sb = new StringBuilder();
foreach (char a in str)
{
switch ((i % 6))
{
case 0:
sb.Append((char)(a + '\x0001'));
break;
case 1:
sb.Append((char)(a + '\x0005'));
break;
case 2:
sb.Append((char)(a + '\a'));
break;
case 3:
sb.Append((char)(a + '\x0002'));
break;
case 4:
sb.Append((char)(a + '\x0004'));
break;
case 5:
sb.Append((char)(a + '\t'));
break;
}
i++;
}
return sb.ToString();
}
public static string Transform2(string str)
{
uint j = 0;
StringBuilder sb = new StringBuilder();
str = Reverse(str);
foreach (char a in str)
{
j = a;
if (j > 0xff)
{
j = (uint)((a >> 8) + ((a & 0xff) << 8));
}
else
{
j = (uint)((a >> 4) + ((a & 15) << 4));
}
sb.Append((char)j);
}
return sb.ToString();
}
//解密方式三
public static string Transform3(string str)
{
int i = 0;
StringBuilder sb = new StringBuilder();
foreach (char a in str)
{
switch ((i % 6))
{
case 0:
sb.Append((char)(a + '\x0003'));
break;
case 1:
sb.Append((char)(a + '\x0006'));
break;
case 2:
sb.Append((char)(a + '\b'));
break;
case 3:
sb.Append((char)(a + '\a'));
break;
case 4:
sb.Append((char)(a + '\x0005'));
break;
case 5:
sb.Append((char)(a + '\x0002'));
break;
}
i++;
}
return sb.ToString();
}
public static string RandString()
{
string str = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz~!@#$%^&*,.:;'";
Random r = new Random();
string result = string.Empty;
for (int i = 0; i < 32; i++)
{
int m = r.Next(0, 76);
string s = str.Substring(m, 1);
result += s;
}
return result;
}
public static string DisGuise()
{
string str = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
Random r = new Random();
string result = string.Empty;
for (int i = 0; i < 32; i++)
{
int m = r.Next(0, 46);
string s = str.Substring(m, 1);
result += s;
}
return result;
}
}
